core:crypto/hash: Add a generic higher level hash interface

There is a lot of code duplicated in convenience methods in each hash
implementation, and having a generic hash type makes implementing
higher-level constructs such as HMAC significantly easier down the road.

18 files changed, 1516 insertions, 2240 deletions

diff --git a/core/crypto/README.md b/core/crypto/README.md
index adb815df4..1e4e41fb8 100644
--- a/core/crypto/README.md
+++ b/core/crypto/README.md
@@ -1,84 +1,22 @@
 # crypto
 
-A cryptography library for the Odin language
+A cryptography library for the Odin language.
 
 ## Supported
 
-This library offers various algorithms implemented in Odin.
-Please see the chart below for some of the options.
-
-## Hashing algorithms
-
-| Algorithm                                                                                                    |                  |
-|:-------------------------------------------------------------------------------------------------------------|:-----------------|
-| [BLAKE2B](https://datatracker.ietf.org/doc/html/rfc7693)                                                     | ✔️ |
-| [BLAKE2S](https://datatracker.ietf.org/doc/html/rfc7693)                                                     | ✔️ |
-| [SHA-2](https://csrc.nist.gov/csrc/media/publications/fips/180/2/archive/2002-08-01/documents/fips180-2.pdf) | ✔️ |
-| [SHA-3](https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf)                                            | ✔️ |
-| [SHAKE](https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf)                                            | ✔️ |
-| [SM3](https://datatracker.ietf.org/doc/html/draft-sca-cfrg-sm3-02)                                           | ✔️ |
-| legacy/[Keccak](https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf)                                    | ✔️ |
-| legacy/[MD5](https://datatracker.ietf.org/doc/html/rfc1321)                                                  | ✔️ |
-| legacy/[SHA-1](https://datatracker.ietf.org/doc/html/rfc3174)                                                | ✔️ |
-
-#### High level API
-
-Each hash algorithm contains a procedure group named `hash`, or if the algorithm provides more than one digest size `hash_<size>`\*.
-Included in these groups are six procedures.
-- `hash_string` - Hash a given string and return the computed hash. Just calls `hash_bytes` internally
-- `hash_bytes` - Hash a given byte slice and return the computed hash
-- `hash_string_to_buffer` - Hash a given string and put the computed hash in the second proc parameter. Just calls `hash_bytes_to_buffer` internally
-- `hash_bytes_to_buffer` - Hash a given string and put the computed hash in the second proc parameter. The destination buffer has to be at least as big as the digest size of the hash
-- `hash_stream` - Takes a stream from io.Stream and returns the computed hash from it
-- `hash_file` - Takes a file handle and returns the computed hash from it. A second optional boolean parameter controls if the file is streamed (this is the default) or read at once (set to true)
-
-\* On some algorithms there is another part to the name, since they might offer control about additional parameters.
-For instance, `SHA-2` offers different sizes.
-Computing a 512-bit hash is therefore achieved by calling `sha2.hash_512(...)`.
-
-#### Low level API
-
-The above mentioned procedures internally call three procedures: `init`, `update` and `final`.
-You may also directly call them, if you wish.
-
-#### Example
-
-```odin
-package crypto_example
-
-// Import the desired package
-import "core:crypto/blake2b"
-
-main :: proc() {
-    input := "foo"
-
-    // Compute the hash, using the high level API
-    computed_hash := blake2b.hash(input)
-
-    // Variant that takes a destination buffer, instead of returning the computed hash
-    hash := make([]byte, sha2.DIGEST_SIZE) // @note: Destination buffer has to be at least as big as the digest size of the hash
-    blake2b.hash(input, hash[:])
-
-    // Compute the hash, using the low level API
-    ctx: blake2b.Context
-    computed_hash_low: [blake2b.DIGEST_SIZE]byte
-    blake2b.init(&ctx)
-    blake2b.update(&ctx, transmute([]byte)input)
-    blake2b.final(&ctx, computed_hash_low[:])
-}
-```
-For example uses of all available algorithms, please see the tests within `tests/core/crypto`.
+This package offers various algorithms implemented in Odin, along with
+useful helpers such as access to the system entropy source, and a
+constant-time byte comparison.
 
 ## Implementation considerations
 
 - The crypto packages are not thread-safe.
 - Best-effort is make to mitigate timing side-channels on reasonable
-  architectures. Architectures that are known to be unreasonable include
+  architectures.  Architectures that are known to be unreasonable include
   but are not limited to i386, i486, and WebAssembly.
-- Some but not all of the packages attempt to santize sensitive data,
-  however this is not done consistently through the library at the moment.
-  As Thomas Pornin puts it "In general, such memory cleansing is a fool's
-  quest."
+- The packages attempt to santize sensitive data, however this is, and
+  will remain a "best-effort" implementation decision.  As Thomas Pornin
+  puts it "In general, such memory cleansing is a fool's quest."
 - All of these packages have not received independent third party review.
 
 ## License
diff --git a/core/crypto/_blake2/blake2.odin b/core/crypto/_blake2/blake2.odin
index 13b58dba9..2ad74843b 100644
--- a/core/crypto/_blake2/blake2.odin
+++ b/core/crypto/_blake2/blake2.odin
@@ -11,6 +11,7 @@ package _blake2
 */
 
 import "core:encoding/endian"
+import "core:mem"
 
 BLAKE2S_BLOCK_SIZE :: 64
 BLAKE2S_SIZE :: 32
@@ -28,7 +29,6 @@ Blake2s_Context :: struct {
 	is_keyed:     bool,
 	size:         byte,
 	is_last_node: bool,
-	cfg:          Blake2_Config,
 
 	is_initialized: bool,
 }
@@ -44,7 +44,6 @@ Blake2b_Context :: struct {
 	is_keyed:     bool,
 	size:         byte,
 	is_last_node: bool,
-	cfg:          Blake2_Config,
 
 	is_initialized: bool,
 }
@@ -83,62 +82,61 @@ BLAKE2B_IV := [8]u64 {
 	0x1f83d9abfb41bd6b, 0x5be0cd19137e2179,
 }
 
-init :: proc(ctx: ^$T) {
+init :: proc(ctx: ^$T, cfg: ^Blake2_Config) {
 	when T == Blake2s_Context {
-		block_size :: BLAKE2S_BLOCK_SIZE
 		max_size :: BLAKE2S_SIZE
 	} else when T == Blake2b_Context {
-		block_size :: BLAKE2B_BLOCK_SIZE
 		max_size :: BLAKE2B_SIZE
 	}
 
-	if ctx.cfg.size > max_size {
+	if cfg.size > max_size {
 		panic("blake2: requested output size exceeeds algorithm max")
 	}
 
-	p := make([]byte, block_size)
-	defer delete(p)
+	// To save having to allocate a scratch buffer, use the internal
+	// data buffer (`ctx.x`), as it is exactly the correct size.
+	p := ctx.x[:]
 
-	p[0] = ctx.cfg.size
-	p[1] = byte(len(ctx.cfg.key))
+	p[0] = cfg.size
+	p[1] = byte(len(cfg.key))
 
-	if ctx.cfg.salt != nil {
+	if cfg.salt != nil {
 		when T == Blake2s_Context {
-			copy(p[16:], ctx.cfg.salt)
+			copy(p[16:], cfg.salt)
 		} else when T == Blake2b_Context {
-			copy(p[32:], ctx.cfg.salt)
+			copy(p[32:], cfg.salt)
 		}
 	}
-	if ctx.cfg.person != nil {
+	if cfg.person != nil {
 		when T == Blake2s_Context {
-			copy(p[24:], ctx.cfg.person)
+			copy(p[24:], cfg.person)
 		} else when T == Blake2b_Context {
-			copy(p[48:], ctx.cfg.person)
+			copy(p[48:], cfg.person)
 		}
 	}
 
-	if ctx.cfg.tree != nil {
-		p[2] = ctx.cfg.tree.(Blake2_Tree).fanout
-		p[3] = ctx.cfg.tree.(Blake2_Tree).max_depth
-		endian.unchecked_put_u32le(p[4:], ctx.cfg.tree.(Blake2_Tree).leaf_size)
+	if cfg.tree != nil {
+		p[2] = cfg.tree.(Blake2_Tree).fanout
+		p[3] = cfg.tree.(Blake2_Tree).max_depth
+		endian.unchecked_put_u32le(p[4:], cfg.tree.(Blake2_Tree).leaf_size)
 		when T == Blake2s_Context {
-			p[8] = byte(ctx.cfg.tree.(Blake2_Tree).node_offset)
-			p[9] = byte(ctx.cfg.tree.(Blake2_Tree).node_offset >> 8)
-			p[10] = byte(ctx.cfg.tree.(Blake2_Tree).node_offset >> 16)
-			p[11] = byte(ctx.cfg.tree.(Blake2_Tree).node_offset >> 24)
-			p[12] = byte(ctx.cfg.tree.(Blake2_Tree).node_offset >> 32)
-			p[13] = byte(ctx.cfg.tree.(Blake2_Tree).node_offset >> 40)
-			p[14] = ctx.cfg.tree.(Blake2_Tree).node_depth
-			p[15] = ctx.cfg.tree.(Blake2_Tree).inner_hash_size
+			p[8] = byte(cfg.tree.(Blake2_Tree).node_offset)
+			p[9] = byte(cfg.tree.(Blake2_Tree).node_offset >> 8)
+			p[10] = byte(cfg.tree.(Blake2_Tree).node_offset >> 16)
+			p[11] = byte(cfg.tree.(Blake2_Tree).node_offset >> 24)
+			p[12] = byte(cfg.tree.(Blake2_Tree).node_offset >> 32)
+			p[13] = byte(cfg.tree.(Blake2_Tree).node_offset >> 40)
+			p[14] = cfg.tree.(Blake2_Tree).node_depth
+			p[15] = cfg.tree.(Blake2_Tree).inner_hash_size
 		} else when T == Blake2b_Context {
-			endian.unchecked_put_u64le(p[8:], ctx.cfg.tree.(Blake2_Tree).node_offset)
-			p[16] = ctx.cfg.tree.(Blake2_Tree).node_depth
-			p[17] = ctx.cfg.tree.(Blake2_Tree).inner_hash_size
+			endian.unchecked_put_u64le(p[8:], cfg.tree.(Blake2_Tree).node_offset)
+			p[16] = cfg.tree.(Blake2_Tree).node_depth
+			p[17] = cfg.tree.(Blake2_Tree).inner_hash_size
 		}
 	} else {
 		p[2], p[3] = 1, 1
 	}
-	ctx.size = ctx.cfg.size
+	ctx.size = cfg.size
 	for i := 0; i < 8; i += 1 {
 		when T == Blake2s_Context {
 			ctx.h[i] = BLAKE2S_IV[i] ~ endian.unchecked_get_u32le(p[i * 4:])
@@ -147,11 +145,14 @@ init :: proc(ctx: ^$T) {
 			ctx.h[i] = BLAKE2B_IV[i] ~ endian.unchecked_get_u64le(p[i * 8:])
 		}
 	}
-	if ctx.cfg.tree != nil && ctx.cfg.tree.(Blake2_Tree).is_last_node {
+
+	mem.zero(&ctx.x, size_of(ctx.x)) // Done with the scratch space, no barrier.
+
+	if cfg.tree != nil && cfg.tree.(Blake2_Tree).is_last_node {
 		ctx.is_last_node = true
 	}
-	if len(ctx.cfg.key) > 0 {
-		copy(ctx.padded_key[:], ctx.cfg.key)
+	if len(cfg.key) > 0 {
+		copy(ctx.padded_key[:], cfg.key)
 		update(ctx, ctx.padded_key[:])
 		ctx.is_keyed = true
 	}
@@ -194,22 +195,40 @@ update :: proc(ctx: ^$T, p: []byte) {
 	ctx.nx += copy(ctx.x[ctx.nx:], p)
 }
 
-final :: proc(ctx: ^$T, hash: []byte) {
+final :: proc(ctx: ^$T, hash: []byte, finalize_clone: bool = false) {
 	assert(ctx.is_initialized)
 
+	ctx := ctx
+	if finalize_clone {
+		tmp_ctx: T
+		clone(&tmp_ctx, ctx)
+		ctx = &tmp_ctx
+	}
+	defer(reset(ctx))
+
 	when T == Blake2s_Context {
-		if len(hash) < int(ctx.cfg.size) {
+		if len(hash) < int(ctx.size) {
 			panic("crypto/blake2s: invalid destination digest size")
 		}
 		blake2s_final(ctx, hash)
 	} else when T == Blake2b_Context {
-		if len(hash) < int(ctx.cfg.size) {
+		if len(hash) < int(ctx.size) {
 			panic("crypto/blake2b: invalid destination digest size")
 		}
 		blake2b_final(ctx, hash)
 	}
+}
+
+clone :: proc(ctx, other: ^$T) {
+	ctx^ = other^
+}
+
+reset :: proc(ctx: ^$T) {
+	if !ctx.is_initialized {
+		return
+	}
 
-	ctx.is_initialized = false
+	mem.zero_explicit(ctx, size_of(ctx^))
 }
 
 @(private)
diff --git a/core/crypto/_sha3/sha3.odin b/core/crypto/_sha3/sha3.odin
index 43af0ad75..2f0d0fa57 100644
--- a/core/crypto/_sha3/sha3.odin
+++ b/core/crypto/_sha3/sha3.odin
@@ -12,10 +12,11 @@ package _sha3
 */
 
 import "core:math/bits"
+import "core:mem"
 
 ROUNDS :: 24
 
-Sha3_Context :: struct {
+Context :: struct {
 	st:        struct #raw_union {
 		b: [200]u8,
 		q: [25]u64,
@@ -103,81 +104,101 @@ keccakf :: proc "contextless" (st: ^[25]u64) {
 	}
 }
 
-init :: proc(c: ^Sha3_Context) {
+init :: proc(ctx: ^Context) {
 	for i := 0; i < 25; i += 1 {
-		c.st.q[i] = 0
+		ctx.st.q[i] = 0
 	}
-	c.rsiz = 200 - 2 * c.mdlen
-	c.pt = 0
+	ctx.rsiz = 200 - 2 * ctx.mdlen
+	ctx.pt = 0
 
-	c.is_initialized = true
-	c.is_finalized = false
+	ctx.is_initialized = true
+	ctx.is_finalized = false
 }
 
-update :: proc(c: ^Sha3_Context, data: []byte) {
-	assert(c.is_initialized)
-	assert(!c.is_finalized)
+update :: proc(ctx: ^Context, data: []byte) {
+	assert(ctx.is_initialized)
+	assert(!ctx.is_finalized)
 
-	j := c.pt
+	j := ctx.pt
 	for i := 0; i < len(data); i += 1 {
-		c.st.b[j] ~= data[i]
+		ctx.st.b[j] ~= data[i]
 		j += 1
-		if j >= c.rsiz {
-			keccakf(&c.st.q)
+		if j >= ctx.rsiz {
+			keccakf(&ctx.st.q)
 			j = 0
 		}
 	}
-	c.pt = j
+	ctx.pt = j
 }
 
-final :: proc(c: ^Sha3_Context, hash: []byte) {
-	assert(c.is_initialized)
+final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
+	assert(ctx.is_initialized)
 
-	if len(hash) < c.mdlen {
-		if c.is_keccak {
+	if len(hash) < ctx.mdlen {
+		if ctx.is_keccak {
 			panic("crypto/keccac: invalid destination digest size")
 		}
 		panic("crypto/sha3: invalid destination digest size")
 	}
-	if c.is_keccak {
-		c.st.b[c.pt] ~= 0x01
+
+	ctx := ctx
+	if finalize_clone {
+		tmp_ctx: Context
+		clone(&tmp_ctx, ctx)
+		ctx = &tmp_ctx
+	}
+	defer(reset(ctx))
+
+	if ctx.is_keccak {
+		ctx.st.b[ctx.pt] ~= 0x01
 	} else {
-		c.st.b[c.pt] ~= 0x06
+		ctx.st.b[ctx.pt] ~= 0x06
 	}
 
-	c.st.b[c.rsiz - 1] ~= 0x80
-	keccakf(&c.st.q)
-	for i := 0; i < c.mdlen; i += 1 {
-		hash[i] = c.st.b[i]
+	ctx.st.b[ctx.rsiz - 1] ~= 0x80
+	keccakf(&ctx.st.q)
+	for i := 0; i < ctx.mdlen; i += 1 {
+		hash[i] = ctx.st.b[i]
 	}
+}
 
-	c.is_initialized = false // No more absorb, no more squeeze.
+clone :: proc(ctx, other: ^Context) {
+	ctx^ = other^
 }
 
-shake_xof :: proc(c: ^Sha3_Context) {
-	assert(c.is_initialized)
-	assert(!c.is_finalized)
+reset :: proc(ctx: ^Context) {
+	if !ctx.is_initialized {
+		return
+	}
+
+	mem.zero_explicit(ctx, size_of(ctx^))
+}
+
+
+shake_xof :: proc(ctx: ^Context) {
+	assert(ctx.is_initialized)
+	assert(!ctx.is_finalized)
 
-	c.st.b[c.pt] ~= 0x1F
-	c.st.b[c.rsiz - 1] ~= 0x80
-	keccakf(&c.st.q)
-	c.pt = 0
+	ctx.st.b[ctx.pt] ~= 0x1F
+	ctx.st.b[ctx.rsiz - 1] ~= 0x80
+	keccakf(&ctx.st.q)
+	ctx.pt = 0
 
-	c.is_finalized = true // No more absorb, unlimited squeeze.
+	ctx.is_finalized = true // No more absorb, unlimited squeeze.
 }
 
-shake_out :: proc(c: ^Sha3_Context, hash: []byte) {
-	assert(c.is_initialized)
-	assert(c.is_finalized)
+shake_out :: proc(ctx: ^Context, hash: []byte) {
+	assert(ctx.is_initialized)
+	assert(ctx.is_finalized)
 
-	j := c.pt
+	j := ctx.pt
 	for i := 0; i < len(hash); i += 1 {
-		if j >= c.rsiz {
-			keccakf(&c.st.q)
+		if j >= ctx.rsiz {
+			keccakf(&ctx.st.q)
 			j = 0
 		}
-		hash[i] = c.st.b[j]
+		hash[i] = ctx.st.b[j]
 		j += 1
 	}
-	c.pt = j
+	ctx.pt = j
 }
diff --git a/core/crypto/blake2b/blake2b.odin b/core/crypto/blake2b/blake2b.odin
index 17657311e..41f691cfa 100644
--- a/core/crypto/blake2b/blake2b.odin
+++ b/core/crypto/blake2b/blake2b.odin
@@ -7,121 +7,33 @@ package blake2b
     List of contributors:
         zhibog, dotbmp:  Initial implementation.
 
-    Interface for the BLAKE2b hashing algorithm.
-    BLAKE2b and BLAKE2s share the implementation in the _blake2 package.
+    Interface for the vanilla BLAKE2b hashing algorithm.
 */
 
-import "core:io"
-import "core:os"
-
 import "../_blake2"
 
-/*
-    High level API
-*/
-
 DIGEST_SIZE :: 64
 
-// hash_string will hash the given input and return the
-// computed hash
-hash_string :: proc(data: string) -> [DIGEST_SIZE]byte {
-	return hash_bytes(transmute([]byte)(data))
-}
-
-// hash_bytes will hash the given input and return the
-// computed hash
-hash_bytes :: proc(data: []byte) -> [DIGEST_SIZE]byte {
-	hash: [DIGEST_SIZE]byte
-	ctx: Context
-	cfg: _blake2.Blake2_Config
-	cfg.size = _blake2.BLAKE2B_SIZE
-	ctx.cfg = cfg
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer :: proc(data, hash: []byte) {
-	ctx: Context
-	cfg: _blake2.Blake2_Config
-	cfg.size = _blake2.BLAKE2B_SIZE
-	ctx.cfg = cfg
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
+Context :: _blake2.Blake2b_Context
 
-// hash_stream will read the stream in chunks and compute a
-// hash from its contents
-hash_stream :: proc(s: io.Stream) -> ([DIGEST_SIZE]byte, bool) {
-	hash: [DIGEST_SIZE]byte
-	ctx: Context
+init :: proc(ctx: ^Context) {
 	cfg: _blake2.Blake2_Config
 	cfg.size = _blake2.BLAKE2B_SIZE
-	ctx.cfg = cfg
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
+	_blake2.init(ctx, &cfg)
 }
 
-// hash_file will read the file provided by the given handle
-// and compute a hash
-hash_file :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE]byte, bool) {
-	if !load_at_once {
-		return hash_stream(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE]byte{}, false
+update :: proc(ctx: ^Context, data: []byte) {
+	_blake2.update(ctx, data)
 }
 
-hash :: proc {
-	hash_stream,
-	hash_file,
-	hash_bytes,
-	hash_string,
-	hash_bytes_to_buffer,
-	hash_string_to_buffer,
+final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
+	_blake2.final(ctx, hash, finalize_clone)
 }
 
-/*
-    Low level API
-*/
-
-Context :: _blake2.Blake2b_Context
-
-init :: proc(ctx: ^Context) {
-	_blake2.init(ctx)
-}
-
-update :: proc(ctx: ^Context, data: []byte) {
-	_blake2.update(ctx, data)
+clone :: proc(ctx, other: ^Context) {
+	_blake2.clone(ctx, other)
 }
 
-final :: proc(ctx: ^Context, hash: []byte) {
-	_blake2.final(ctx, hash)
+reset :: proc(ctx: ^Context) {
+	_blake2.reset(ctx)
 }
diff --git a/core/crypto/blake2s/blake2s.odin b/core/crypto/blake2s/blake2s.odin
index 2da619bb8..f7a5d068b 100644
--- a/core/crypto/blake2s/blake2s.odin
+++ b/core/crypto/blake2s/blake2s.odin
@@ -7,121 +7,33 @@ package blake2s
     List of contributors:
         zhibog, dotbmp:  Initial implementation.
 
-    Interface for the BLAKE2s hashing algorithm.
-    BLAKE2s and BLAKE2b share the implementation in the _blake2 package.
+    Interface for the vanilla BLAKE2s hashing algorithm.
 */
 
-import "core:io"
-import "core:os"
-
 import "../_blake2"
 
-/*
-    High level API
-*/
-
 DIGEST_SIZE :: 32
 
-// hash_string will hash the given input and return the
-// computed hash
-hash_string :: proc(data: string) -> [DIGEST_SIZE]byte {
-	return hash_bytes(transmute([]byte)(data))
-}
-
-// hash_bytes will hash the given input and return the
-// computed hash
-hash_bytes :: proc(data: []byte) -> [DIGEST_SIZE]byte {
-	hash: [DIGEST_SIZE]byte
-	ctx: Context
-	cfg: _blake2.Blake2_Config
-	cfg.size = _blake2.BLAKE2S_SIZE
-	ctx.cfg = cfg
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer :: proc(data, hash: []byte) {
-	ctx: Context
-	cfg: _blake2.Blake2_Config
-	cfg.size = _blake2.BLAKE2S_SIZE
-	ctx.cfg = cfg
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
+Context :: _blake2.Blake2s_Context
 
-// hash_stream will read the stream in chunks and compute a
-// hash from its contents
-hash_stream :: proc(s: io.Stream) -> ([DIGEST_SIZE]byte, bool) {
-	hash: [DIGEST_SIZE]byte
-	ctx: Context
+init :: proc(ctx: ^Context) {
 	cfg: _blake2.Blake2_Config
 	cfg.size = _blake2.BLAKE2S_SIZE
-	ctx.cfg = cfg
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
+	_blake2.init(ctx, &cfg)
 }
 
-// hash_file will read the file provided by the given handle
-// and compute a hash
-hash_file :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE]byte, bool) {
-	if !load_at_once {
-		return hash_stream(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE]byte{}, false
+update :: proc(ctx: ^Context, data: []byte) {
+	_blake2.update(ctx, data)
 }
 
-hash :: proc {
-	hash_stream,
-	hash_file,
-	hash_bytes,
-	hash_string,
-	hash_bytes_to_buffer,
-	hash_string_to_buffer,
+final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
+	_blake2.final(ctx, hash, finalize_clone)
 }
 
-/*
-    Low level API
-*/
-
-Context :: _blake2.Blake2s_Context
-
-init :: proc(ctx: ^Context) {
-	_blake2.init(ctx)
-}
-
-update :: proc(ctx: ^Context, data: []byte) {
-	_blake2.update(ctx, data)
+clone :: proc(ctx, other: ^Context) {
+	_blake2.clone(ctx, other)
 }
 
-final :: proc(ctx: ^Context, hash: []byte) {
-	_blake2.final(ctx, hash)
+reset :: proc(ctx: ^Context) {
+	_blake2.reset(ctx)
 }
diff --git a/core/crypto/hash/doc.odin b/core/crypto/hash/doc.odin
new file mode 100644
index 000000000..d50908b94
--- /dev/null
+++ b/core/crypto/hash/doc.odin
@@ -0,0 +1,62 @@
+/*
+package hash provides a generic interface to the supported hash algorithms.
+
+A high-level convenience procedure group `hash` is provided to easily
+accomplish common tasks.
+- `hash_string` - Hash a given string and return the digest.
+- `hash_bytes` - Hash a given byte slice and return the digest.
+- `hash_string_to_buffer` - Hash a given string and put the digest in
+  the third parameter.  It requires that the destination buffer
+  is at least as big as the digest size.
+- `hash_bytes_to_buffer` - Hash a given string and put the computed
+  digest in the third parameter.  It requires that the destination
+  buffer is at least as big as the digest size.
+- `hash_stream` - Incrementally fully consume a `io.Stream`, and return
+  the computed digest.
+- `hash_file` - Takes a file handle and returns the computed digest.
+  A third optional boolean parameter controls if the file is streamed
+  (default), or or read at once.
+
+```odin
+package hash_example
+
+import "core:crypto/hash"
+
+main :: proc() {
+	input := "Feed the fire."
+
+	// Compute the digest, using the high level API.
+	returned_digest := hash.hash(hash.Algorithm.SHA512_256, input)
+	defer delete(returned_digest)
+
+	// Variant that takes a destination buffer, instead of returning
+	// the digest.
+	digest := make([]byte, hash.DIGEST_SIZES[hash.Algorithm.BLAKE2B]) // @note: Destination buffer has to be at least as big as the digest size of the hash.
+	defer delete(digest)
+	hash.hash(hash.Algorithm.BLAKE2B, input, digest)
+}
+```
+
+A generic low level API is provided supporting the init/update/final interface
+that is typical with cryptographic hash function implementations.
+
+```odin
+package hash_example
+
+import "core:crypto/hash"
+
+main :: proc() {
+    input := "Let the cinders burn."
+
+    // Compute the digest, using the low level API.
+    ctx: hash.Context
+    digest := make([]byte, hash.DIGEST_SIZES[hash.Algorithm.SHA3_512])
+    defer delete(digest)
+
+    hash.init(&ctx, hash.Algorithm.SHA3_512)
+    hash.update(&ctx, transmute([]byte)input)
+    hash.final(&ctx, digest)
+}
+```
+*/
+package crypto_hash
\ No newline at end of file
diff --git a/core/crypto/hash/hash.odin b/core/crypto/hash/hash.odin
new file mode 100644
index 000000000..2931cb4a0
--- /dev/null
+++ b/core/crypto/hash/hash.odin
@@ -0,0 +1,118 @@
+package crypto_hash
+
+/*
+    Copyright 2021 zhibog
+    Made available under the BSD-3 license.
+
+    List of contributors:
+        zhibog, dotbmp:  Initial implementation.
+*/
+
+import "core:io"
+import "core:mem"
+import "core:os"
+
+// hash_bytes will hash the given input and return the computed digest
+// in a newly allocated slice.
+hash_string :: proc(algorithm: Algorithm, data: string, allocator := context.allocator) -> []byte {
+	return hash_bytes(algorithm, transmute([]byte)(data), allocator)
+}
+
+// hash_bytes will hash the given input and return the computed digest
+// in a newly allocated slice.
+hash_bytes :: proc(algorithm: Algorithm, data: []byte, allocator := context.allocator) -> []byte {
+	dst := make([]byte, DIGEST_SIZES[algorithm], allocator)
+	hash_bytes_to_buffer(algorithm, data, dst)
+	return dst
+}
+
+// hash_string_to_buffer will hash the given input and assign the
+// computed digest to the third parameter.  It requires that the
+// destination buffer is at least as big as the digest size.
+hash_string_to_buffer :: proc(algorithm: Algorithm, data: string, hash: []byte) {
+	hash_bytes_to_buffer(algorithm, transmute([]byte)(data), hash)
+}
+
+// hash_bytes_to_buffer will hash the given input and write the
+// computed digest into the third parameter.  It requires that the
+// destination buffer is at least as big as the digest size.
+hash_bytes_to_buffer :: proc(algorithm: Algorithm, data, hash: []byte) {
+	ctx: Context
+
+	init(&ctx, algorithm, context.temp_allocator)
+	update(&ctx, data)
+	final(&ctx, hash)
+}
+
+// hash_stream will incrementally fully consume a stream, and return the
+// computed digest in a newly allocated slice.
+hash_stream :: proc(
+	algorithm: Algorithm,
+	s: io.Stream,
+	allocator := context.allocator,
+) -> (
+	[]byte,
+	io.Error,
+) {
+	ctx: Context
+
+	init(&ctx, algorithm, context.temp_allocator)
+
+	_BUFFER_SIZE :: 512
+	buf := make([]byte, _BUFFER_SIZE, context.temp_allocator)
+	defer mem.zero_explicit(raw_data(buf), _BUFFER_SIZE)
+	defer delete(buf)
+
+	loop: for {
+		n, err := io.read(s, buf)
+		if n > 0 {
+			// XXX/yawning: Can io.read return n > 0 and EOF?
+			update(&ctx, buf[:n])
+		}
+		#partial switch err {
+		case .None:
+		case .EOF:
+			break loop
+		case:
+			return nil, err
+		}
+	}
+
+	dst := make([]byte, DIGEST_SIZES[algorithm], allocator)
+	final(&ctx, dst)
+
+	return dst, io.Error.None
+}
+
+// hash_file will read the file provided by the given handle and return the
+// computed digest in a newly allocated slice.
+hash_file :: proc(
+	algorithm: Algorithm,
+	hd: os.Handle,
+	load_at_once := false,
+	allocator := context.allocator,
+) -> (
+	[]byte,
+	io.Error,
+) {
+	if !load_at_once {
+		return hash_stream(algorithm, os.stream_from_handle(hd), allocator)
+	}
+
+	buf, ok := os.read_entire_file(hd, allocator)
+	if !ok {
+		return nil, io.Error.Unknown
+	}
+	defer delete(buf)
+
+	return hash_bytes(algorithm, buf, allocator), io.Error.None
+}
+
+hash :: proc {
+	hash_stream,
+	hash_file,
+	hash_bytes,
+	hash_string,
+	hash_bytes_to_buffer,
+	hash_string_to_buffer,
+}
diff --git a/core/crypto/hash/low_level.odin b/core/crypto/hash/low_level.odin
new file mode 100644
index 000000000..01901a95a
--- /dev/null
+++ b/core/crypto/hash/low_level.odin
@@ -0,0 +1,382 @@
+package crypto_hash
+
+import "core:crypto/blake2b"
+import "core:crypto/blake2s"
+import "core:crypto/sha2"
+import "core:crypto/sha3"
+import "core:crypto/shake"
+import "core:crypto/sm3"
+import "core:crypto/legacy/keccak"
+import "core:crypto/legacy/md5"
+import "core:crypto/legacy/sha1"
+
+import "core:mem"
+
+// Algorithm is the algorithm identifier associated with a given Context.
+Algorithm :: enum {
+	Invalid,
+	BLAKE2B,
+	BLAKE2S,
+	SHA224,
+	SHA256,
+	SHA384,
+	SHA512,
+	SHA512_256,
+	SHA3_224,
+	SHA3_256,
+	SHA3_384,
+	SHA3_512,
+	SHAKE_128,
+	SHAKE_256,
+	SM3,
+	Legacy_KECCAK_224,
+	Legacy_KECCAK_256,
+	Legacy_KECCAK_384,
+	Legacy_KECCAK_512,
+	Insecure_MD5,
+	Insecure_SHA1,
+}
+
+// ALGORITHM_NAMES is the Algorithm to algorithm name string.
+ALGORITHM_NAMES := [Algorithm]string {
+	.Invalid           = "Invalid",
+	.BLAKE2B           = "BLAKE2b",
+	.BLAKE2S           = "BLAKE2s",
+	.SHA224            = "SHA-224",
+	.SHA256            = "SHA-256",
+	.SHA384            = "SHA-384",
+	.SHA512            = "SHA-512",
+	.SHA512_256        = "SHA-512/256",
+	.SHA3_224          = "SHA3-224",
+	.SHA3_256          = "SHA3-256",
+	.SHA3_384          = "SHA3-384",
+	.SHA3_512          = "SHA3-512",
+	.SHAKE_128         = "SHAKE-128",
+	.SHAKE_256         = "SHAKE-256",
+	.SM3               = "SM3",
+	.Legacy_KECCAK_224 = "Keccak-224",
+	.Legacy_KECCAK_256 = "Keccak-256",
+	.Legacy_KECCAK_384 = "Keccak-384",
+	.Legacy_KECCAK_512 = "Keccak-512",
+	.Insecure_MD5      = "MD5",
+	.Insecure_SHA1     = "SHA-1",
+}
+
+// DIGEST_SIZES is the Algorithm to digest size.
+DIGEST_SIZES := [Algorithm]int {
+	.Invalid           = 0,
+	.BLAKE2B           = blake2b.DIGEST_SIZE,
+	.BLAKE2S           = blake2s.DIGEST_SIZE,
+	.SHA224            = sha2.DIGEST_SIZE_224,
+	.SHA256            = sha2.DIGEST_SIZE_256,
+	.SHA384            = sha2.DIGEST_SIZE_384,
+	.SHA512            = sha2.DIGEST_SIZE_512,
+	.SHA512_256        = sha2.DIGEST_SIZE_512_256,
+	.SHA3_224          = sha3.DIGEST_SIZE_224,
+	.SHA3_256          = sha3.DIGEST_SIZE_256,
+	.SHA3_384          = sha3.DIGEST_SIZE_384,
+	.SHA3_512          = sha3.DIGEST_SIZE_512,
+	.SHAKE_128         = shake.DIGEST_SIZE_128,
+	.SHAKE_256         = shake.DIGEST_SIZE_256,
+	.SM3               = sm3.DIGEST_SIZE,
+	.Legacy_KECCAK_224 = keccak.DIGEST_SIZE_224,
+	.Legacy_KECCAK_256 = keccak.DIGEST_SIZE_256,
+	.Legacy_KECCAK_384 = keccak.DIGEST_SIZE_384,
+	.Legacy_KECCAK_512 = keccak.DIGEST_SIZE_512,
+	.Insecure_MD5      = md5.DIGEST_SIZE,
+	.Insecure_SHA1     = sha1.DIGEST_SIZE,
+}
+
+// Context is a concrete instantiation of a specific hash algorithm.
+Context :: struct {
+	_algo: Algorithm,
+	_impl: union {
+		^blake2b.Context,
+		^blake2s.Context,
+		^sha2.Context_256,
+		^sha2.Context_512,
+		^sha3.Context,
+		^shake.Context,
+		^sm3.Context,
+		^keccak.Context,
+		^md5.Context,
+		^sha1.Context,
+	},
+	_allocator: mem.Allocator,
+}
+
+// init initializes a Context with a specific hash Algorithm.
+//
+// Warning: Internal state is allocated, and resources must be freed
+// either implicitly via a call to final, or explicitly via calling reset.
+init :: proc(ctx: ^Context, algorithm: Algorithm, allocator := context.allocator) {
+	if ctx._impl != nil {
+		reset(ctx)
+	}
+
+	switch algorithm {
+	case .BLAKE2B:
+		impl := new(blake2b.Context, allocator)
+		blake2b.init(impl)
+		ctx._impl = impl
+	case .BLAKE2S:
+		impl := new(blake2s.Context, allocator)
+		blake2s.init(impl)
+		ctx._impl = impl
+	case .SHA224:
+		impl := new(sha2.Context_256, allocator)
+		sha2.init_224(impl)
+		ctx._impl = impl
+	case .SHA256:
+		impl := new(sha2.Context_256, allocator)
+		sha2.init_256(impl)
+		ctx._impl = impl
+	case .SHA384:
+		impl := new(sha2.Context_512, allocator)
+		sha2.init_384(impl)
+		ctx._impl = impl
+	case .SHA512:
+		impl := new(sha2.Context_512, allocator)
+		sha2.init_512(impl)
+		ctx._impl = impl
+	case .SHA512_256:
+		impl := new(sha2.Context_512, allocator)
+		sha2.init_512_256(impl)
+		ctx._impl = impl
+	case .SHA3_224:
+		impl := new(sha3.Context, allocator)
+		sha3.init_224(impl)
+		ctx._impl = impl
+	case .SHA3_256:
+		impl := new(sha3.Context, allocator)
+		sha3.init_256(impl)
+		ctx._impl = impl
+	case .SHA3_384:
+		impl := new(sha3.Context, allocator)
+		sha3.init_384(impl)
+		ctx._impl = impl
+	case .SHA3_512:
+		impl := new(sha3.Context, allocator)
+		sha3.init_512(impl)
+		ctx._impl = impl
+	case .SHAKE_128:
+		impl := new(shake.Context, allocator)
+		shake.init_128(impl)
+		ctx._impl = impl
+	case .SHAKE_256:
+		impl := new(shake.Context, allocator)
+		shake.init_256(impl)
+		ctx._impl = impl
+	case .SM3:
+		impl := new(sm3.Context, allocator)
+		sm3.init(impl)
+		ctx._impl = impl
+	case .Legacy_KECCAK_224:
+		impl := new(keccak.Context, allocator)
+		keccak.init_224(impl)
+		ctx._impl = impl
+	case .Legacy_KECCAK_256:
+		impl := new(keccak.Context, allocator)
+		keccak.init_256(impl)
+		ctx._impl = impl
+	case .Legacy_KECCAK_384:
+		impl := new(keccak.Context, allocator)
+		keccak.init_384(impl)
+		ctx._impl = impl
+	case .Legacy_KECCAK_512:
+		impl := new(keccak.Context, allocator)
+		keccak.init_512(impl)
+		ctx._impl = impl
+	case .Insecure_MD5:
+		impl := new(md5.Context, allocator)
+		md5.init(impl)
+		ctx._impl = impl
+	case .Insecure_SHA1:
+		impl := new(sha1.Context, allocator)
+		sha1.init(impl)
+		ctx._impl = impl
+	case .Invalid:
+		panic("crypto/hash: uninitialized algorithm")
+	case:
+		panic("crypto/hash: invalid algorithm")
+	}
+
+	ctx._algo = algorithm
+	ctx._allocator = allocator
+}
+
+// update adds more data to the Context.
+update :: proc(ctx: ^Context, data: []byte) {
+	switch impl in ctx._impl {
+	case ^blake2b.Context:
+		blake2b.update(impl, data)
+	case ^blake2s.Context:
+		blake2s.update(impl, data)
+	case ^sha2.Context_256:
+		sha2.update(impl, data)
+	case ^sha2.Context_512:
+		sha2.update(impl, data)
+	case ^sha3.Context:
+		sha3.update(impl, data)
+	case ^shake.Context:
+		shake.update(impl, data)
+	case ^sm3.Context:
+		sm3.update(impl, data)
+	case ^keccak.Context:
+		keccak.update(impl, data)
+	case ^md5.Context:
+		md5.update(impl, data)
+	case ^sha1.Context:
+		sha1.update(impl, data)
+	case:
+		panic("crypto/hash: uninitialized algorithm")
+	}
+}
+
+// final finalizes the Context, writes the digest to hash, and calls
+// reset on the Context.
+//
+// Iff finalize_clone is set, final will work on a copy of the Context,
+// which is useful for for calculating rolling digests.
+final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
+	switch impl in ctx._impl {
+	case ^blake2b.Context:
+		blake2b.final(impl, hash, finalize_clone)
+	case ^blake2s.Context:
+		blake2s.final(impl, hash, finalize_clone)
+	case ^sha2.Context_256:
+		sha2.final(impl, hash, finalize_clone)
+	case ^sha2.Context_512:
+		sha2.final(impl, hash, finalize_clone)
+	case ^sha3.Context:
+		sha3.final(impl, hash, finalize_clone)
+	case ^shake.Context:
+		shake.final(impl, hash, finalize_clone)
+	case ^sm3.Context:
+		sm3.final(impl, hash, finalize_clone)
+	case ^keccak.Context:
+		keccak.final(impl, hash, finalize_clone)
+	case ^md5.Context:
+		md5.final(impl, hash, finalize_clone)
+	case ^sha1.Context:
+		sha1.final(impl, hash, finalize_clone)
+	case:
+		panic("crypto/hash: uninitialized algorithm")
+	}
+
+	if !finalize_clone {
+		reset(ctx)
+	}
+}
+
+// clone clones the Context other into ctx.
+clone :: proc(ctx, other: ^Context, allocator := context.allocator) {
+	// XXX/yawning: Maybe these cases should panic, because both cases,
+	// are probably bugs.
+	if ctx == other {
+		return
+	}
+	if ctx._impl != nil {
+		reset(ctx)
+	}
+
+	ctx._algo = other._algo
+	ctx._allocator = allocator
+
+	switch src_impl in other._impl {
+	case ^blake2b.Context:
+		impl := new(blake2b.Context, allocator)
+		blake2b.clone(impl, src_impl)
+		ctx._impl = impl
+	case ^blake2s.Context:
+		impl := new(blake2s.Context, allocator)
+		blake2s.clone(impl, src_impl)
+		ctx._impl = impl
+	case ^sha2.Context_256:
+		impl := new(sha2.Context_256, allocator)
+		sha2.clone(impl, src_impl)
+		ctx._impl = impl
+	case ^sha2.Context_512:
+		impl := new(sha2.Context_512, allocator)
+		sha2.clone(impl, src_impl)
+		ctx._impl = impl
+	case ^sha3.Context:
+		impl := new(sha3.Context, allocator)
+		sha3.clone(impl, src_impl)
+		ctx._impl = impl
+	case ^shake.Context:
+		impl := new(shake.Context, allocator)
+		shake.clone(impl, src_impl)
+		ctx._impl = impl
+	case ^sm3.Context:
+		impl := new(sm3.Context, allocator)
+		sm3.clone(impl, src_impl)
+		ctx._impl = impl
+	case ^keccak.Context:
+		impl := new(keccak.Context, allocator)
+		keccak.clone(impl, src_impl)
+		ctx._impl = impl
+	case ^md5.Context:
+		impl := new(md5.Context, allocator)
+		md5.clone(impl, src_impl)
+		ctx._impl = impl
+	case ^sha1.Context:
+		impl := new(sha1.Context, allocator)
+		sha1.clone(impl, src_impl)
+		ctx._impl = impl
+	case:
+		panic("crypto/hash: uninitialized algorithm")
+	}
+}
+
+// reset sanitizes the Context and frees resources internal to the
+// Context.  The Context must be re-initialized to be used again.
+reset :: proc(ctx: ^Context) {
+	switch impl in ctx._impl {
+	case ^blake2b.Context:
+		blake2b.reset(impl)
+		free(impl, ctx._allocator)
+	case ^blake2s.Context:
+		blake2s.reset(impl)
+		free(impl, ctx._allocator)
+	case ^sha2.Context_256:
+		sha2.reset(impl)
+		free(impl, ctx._allocator)
+	case ^sha2.Context_512:
+		sha2.reset(impl)
+		free(impl, ctx._allocator)
+	case ^sha3.Context:
+		sha3.reset(impl)
+		free(impl, ctx._allocator)
+	case ^shake.Context:
+		shake.reset(impl)
+		free(impl, ctx._allocator)
+	case ^sm3.Context:
+		sm3.reset(impl)
+		free(impl, ctx._allocator)
+	case ^keccak.Context:
+		keccak.reset(impl)
+		free(impl, ctx._allocator)
+	case ^md5.Context:
+		md5.reset(impl)
+		free(impl, ctx._allocator)
+	case ^sha1.Context:
+		sha1.reset(impl)
+		free(impl, ctx._allocator)
+	case:
+	// Unlike clone, calling reset repeatedly is fine.
+	}
+
+	ctx._algo = .Invalid
+	ctx._impl = nil
+}
+
+// algorithm returns the Algorithm used by a Context instance.
+algorithm :: proc(ctx: ^Context) -> Algorithm {
+	return ctx._algo
+}
+
+// digest_size returns the digest size of a Context instance.
+digest_size :: proc(ctx: ^Context) -> int {
+	return DIGEST_SIZES[ctx._algo]
+}
diff --git a/core/crypto/legacy/keccak/keccak.odin b/core/crypto/legacy/keccak/keccak.odin
index 09db853a6..6b01cbbde 100644
--- a/core/crypto/legacy/keccak/keccak.odin
+++ b/core/crypto/legacy/keccak/keccak.odin
@@ -7,371 +7,59 @@ package keccak
     List of contributors:
         zhibog, dotbmp:  Initial implementation.
 
-    Interface for the Keccak hashing algorithm.
-    This is done because the padding in the SHA3 standard was changed by the NIST, resulting in a different output.
+    Interface for the Keccak hashing algorithm.  Most users will probably
+    want SHA-3 and/or SHAKE instead, however the padding was changed during
+    the standardization process by NIST, thus the legacy Keccak algorithm
+    is provided.
 */
 
-import "core:io"
-import "core:os"
-
 import "../../_sha3"
 
-/*
-    High level API
-*/
-
 DIGEST_SIZE_224 :: 28
 DIGEST_SIZE_256 :: 32
 DIGEST_SIZE_384 :: 48
 DIGEST_SIZE_512 :: 64
 
-// hash_string_224 will hash the given input and return the
-// computed hash
-hash_string_224 :: proc(data: string) -> [DIGEST_SIZE_224]byte {
-	return hash_bytes_224(transmute([]byte)(data))
-}
+Context :: distinct _sha3.Context
 
-// hash_bytes_224 will hash the given input and return the
-// computed hash
-hash_bytes_224 :: proc(data: []byte) -> [DIGEST_SIZE_224]byte {
-	hash: [DIGEST_SIZE_224]byte
-	ctx: Context
+init_224 :: proc(ctx: ^Context) {
 	ctx.mdlen = DIGEST_SIZE_224
-	ctx.is_keccak = true
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
+	_init(ctx)
 }
 
-// hash_string_to_buffer_224 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_224 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_224(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_224 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_224 :: proc(data, hash: []byte) {
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_224
-	ctx.is_keccak = true
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream_224 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_224 :: proc(s: io.Stream) -> ([DIGEST_SIZE_224]byte, bool) {
-	hash: [DIGEST_SIZE_224]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_224
-	ctx.is_keccak = true
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_224 will read the file provided by the given handle
-// and compute a hash
-hash_file_224 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_224]byte, bool) {
-	if !load_at_once {
-		return hash_stream_224(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_224(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_224]byte{}, false
-}
-
-hash_224 :: proc {
-	hash_stream_224,
-	hash_file_224,
-	hash_bytes_224,
-	hash_string_224,
-	hash_bytes_to_buffer_224,
-	hash_string_to_buffer_224,
-}
-
-// hash_string_256 will hash the given input and return the
-// computed hash
-hash_string_256 :: proc(data: string) -> [DIGEST_SIZE_256]byte {
-	return hash_bytes_256(transmute([]byte)(data))
-}
-
-// hash_bytes_256 will hash the given input and return the
-// computed hash
-hash_bytes_256 :: proc(data: []byte) -> [DIGEST_SIZE_256]byte {
-	hash: [DIGEST_SIZE_256]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_256
-	ctx.is_keccak = true
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_256 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_256 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_256(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_256 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_256 :: proc(data, hash: []byte) {
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_256
-	ctx.is_keccak = true
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream_256 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_256 :: proc(s: io.Stream) -> ([DIGEST_SIZE_256]byte, bool) {
-	hash: [DIGEST_SIZE_256]byte
-	ctx: Context
+init_256 :: proc(ctx: ^Context) {
 	ctx.mdlen = DIGEST_SIZE_256
-	ctx.is_keccak = true
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_256 will read the file provided by the given handle
-// and compute a hash
-hash_file_256 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_256]byte, bool) {
-	if !load_at_once {
-		return hash_stream_256(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_256(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_256]byte{}, false
-}
-
-hash_256 :: proc {
-	hash_stream_256,
-	hash_file_256,
-	hash_bytes_256,
-	hash_string_256,
-	hash_bytes_to_buffer_256,
-	hash_string_to_buffer_256,
+	_init(ctx)
 }
 
-// hash_string_384 will hash the given input and return the
-// computed hash
-hash_string_384 :: proc(data: string) -> [DIGEST_SIZE_384]byte {
-	return hash_bytes_384(transmute([]byte)(data))
-}
-
-// hash_bytes_384 will hash the given input and return the
-// computed hash
-hash_bytes_384 :: proc(data: []byte) -> [DIGEST_SIZE_384]byte {
-	hash: [DIGEST_SIZE_384]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_384
-	ctx.is_keccak = true
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_384 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_384 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_384(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_384 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_384 :: proc(data, hash: []byte) {
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_384
-	ctx.is_keccak = true
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream_384 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_384 :: proc(s: io.Stream) -> ([DIGEST_SIZE_384]byte, bool) {
-	hash: [DIGEST_SIZE_384]byte
-	ctx: Context
+init_384 :: proc(ctx: ^Context) {
 	ctx.mdlen = DIGEST_SIZE_384
-	ctx.is_keccak = true
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_384 will read the file provided by the given handle
-// and compute a hash
-hash_file_384 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_384]byte, bool) {
-	if !load_at_once {
-		return hash_stream_384(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_384(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_384]byte{}, false
-}
-
-hash_384 :: proc {
-	hash_stream_384,
-	hash_file_384,
-	hash_bytes_384,
-	hash_string_384,
-	hash_bytes_to_buffer_384,
-	hash_string_to_buffer_384,
-}
-
-// hash_string_512 will hash the given input and return the
-// computed hash
-hash_string_512 :: proc(data: string) -> [DIGEST_SIZE_512]byte {
-	return hash_bytes_512(transmute([]byte)(data))
-}
-
-// hash_bytes_512 will hash the given input and return the
-// computed hash
-hash_bytes_512 :: proc(data: []byte) -> [DIGEST_SIZE_512]byte {
-	hash: [DIGEST_SIZE_512]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_512
-	ctx.is_keccak = true
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
+	_init(ctx)
 }
 
-// hash_string_to_buffer_512 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_512 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_512(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_512 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_512 :: proc(data, hash: []byte) {
-	ctx: Context
+init_512 :: proc(ctx: ^Context) {
 	ctx.mdlen = DIGEST_SIZE_512
-	ctx.is_keccak = true
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
+	_init(ctx)
 }
 
-// hash_stream_512 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_512 :: proc(s: io.Stream) -> ([DIGEST_SIZE_512]byte, bool) {
-	hash: [DIGEST_SIZE_512]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_512
+@(private)
+_init :: proc(ctx: ^Context) {
 	ctx.is_keccak = true
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_512 will read the file provided by the given handle
-// and compute a hash
-hash_file_512 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_512]byte, bool) {
-	if !load_at_once {
-		return hash_stream_512(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_512(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_512]byte{}, false
+	_sha3.init(transmute(^_sha3.Context)(ctx))
 }
 
-hash_512 :: proc {
-	hash_stream_512,
-	hash_file_512,
-	hash_bytes_512,
-	hash_string_512,
-	hash_bytes_to_buffer_512,
-	hash_string_to_buffer_512,
+update :: proc(ctx: ^Context, data: []byte) {
+	_sha3.update(transmute(^_sha3.Context)(ctx), data)
 }
 
-/*
-    Low level API
-*/
-
-Context :: _sha3.Sha3_Context
-
-init :: proc(ctx: ^Context) {
-	ctx.is_keccak = true
-	_sha3.init(ctx)
+final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
+	_sha3.final(transmute(^_sha3.Context)(ctx), hash, finalize_clone)
 }
 
-update :: proc(ctx: ^Context, data: []byte) {
-	_sha3.update(ctx, data)
+clone :: proc(ctx, other: ^Context) {
+	_sha3.clone(transmute(^_sha3.Context)(ctx), transmute(^_sha3.Context)(other))
 }
 
-final :: proc(ctx: ^Context, hash: []byte) {
-	_sha3.final(ctx, hash)
+reset :: proc(ctx: ^Context) {
+	_sha3.reset(transmute(^_sha3.Context)(ctx))
 }
diff --git a/core/crypto/legacy/md5/md5.odin b/core/crypto/legacy/md5/md5.odin
index 69ae087e4..8a4398be1 100644
--- a/core/crypto/legacy/md5/md5.odin
+++ b/core/crypto/legacy/md5/md5.odin
@@ -11,98 +11,11 @@ package md5
 */
 
 import "core:encoding/endian"
-import "core:io"
 import "core:math/bits"
 import "core:mem"
-import "core:os"
-
-/*
-    High level API
-*/
 
 DIGEST_SIZE :: 16
 
-// hash_string will hash the given input and return the
-// computed hash
-hash_string :: proc(data: string) -> [DIGEST_SIZE]byte {
-	return hash_bytes(transmute([]byte)(data))
-}
-
-// hash_bytes will hash the given input and return the
-// computed hash
-hash_bytes :: proc(data: []byte) -> [DIGEST_SIZE]byte {
-	hash: [DIGEST_SIZE]byte
-	ctx: Context
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer :: proc(data, hash: []byte) {
-	ctx: Context
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream will read the stream in chunks and compute a
-// hash from its contents
-hash_stream :: proc(s: io.Stream) -> ([DIGEST_SIZE]byte, bool) {
-	hash: [DIGEST_SIZE]byte
-	ctx: Context
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file will read the file provided by the given handle
-// and compute a hash
-hash_file :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE]byte, bool) {
-	if !load_at_once {
-		return hash_stream(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE]byte{}, false
-}
-
-hash :: proc {
-	hash_stream,
-	hash_file,
-	hash_bytes,
-	hash_string,
-	hash_bytes_to_buffer,
-	hash_string_to_buffer,
-}
-
-/*
-    Low level API
-*/
-
 init :: proc(ctx: ^Context) {
 	ctx.state[0] = 0x67452301
 	ctx.state[1] = 0xefcdab89
@@ -129,13 +42,21 @@ update :: proc(ctx: ^Context, data: []byte) {
 	}
 }
 
-final :: proc(ctx: ^Context, hash: []byte) {
+final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
 	assert(ctx.is_initialized)
 
 	if len(hash) < DIGEST_SIZE {
 		panic("crypto/md5: invalid destination digest size")
 	}
 
+	ctx := ctx
+	if finalize_clone {
+		tmp_ctx: Context
+		clone(&tmp_ctx, ctx)
+		ctx = &tmp_ctx
+	}
+	defer(reset(ctx))
+
 	i := ctx.datalen
 
 	if ctx.datalen < 56 {
@@ -163,8 +84,18 @@ final :: proc(ctx: ^Context, hash: []byte) {
 	for i = 0; i < DIGEST_SIZE / 4; i += 1 {
 		endian.unchecked_put_u32le(hash[i * 4:], ctx.state[i])
 	}
+}
+
+clone :: proc(ctx, other: ^$T) {
+	ctx^ = other^
+}
+
+reset :: proc(ctx: ^$T) {
+	if !ctx.is_initialized {
+		return
+	}
 
-	ctx.is_initialized = false
+	mem.zero_explicit(ctx, size_of(ctx^))
 }
 
 /*
diff --git a/core/crypto/legacy/sha1/sha1.odin b/core/crypto/legacy/sha1/sha1.odin
index 6c4407067..3ec432dc5 100644
--- a/core/crypto/legacy/sha1/sha1.odin
+++ b/core/crypto/legacy/sha1/sha1.odin
@@ -11,98 +11,11 @@ package sha1
 */
 
 import "core:encoding/endian"
-import "core:io"
 import "core:math/bits"
 import "core:mem"
-import "core:os"
-
-/*
-    High level API
-*/
 
 DIGEST_SIZE :: 20
 
-// hash_string will hash the given input and return the
-// computed hash
-hash_string :: proc(data: string) -> [DIGEST_SIZE]byte {
-	return hash_bytes(transmute([]byte)(data))
-}
-
-// hash_bytes will hash the given input and return the
-// computed hash
-hash_bytes :: proc(data: []byte) -> [DIGEST_SIZE]byte {
-	hash: [DIGEST_SIZE]byte
-	ctx: Context
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer :: proc(data, hash: []byte) {
-	ctx: Context
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream will read the stream in chunks and compute a
-// hash from its contents
-hash_stream :: proc(s: io.Stream) -> ([DIGEST_SIZE]byte, bool) {
-	hash: [DIGEST_SIZE]byte
-	ctx: Context
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file will read the file provided by the given handle
-// and compute a hash
-hash_file :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE]byte, bool) {
-	if !load_at_once {
-		return hash_stream(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE]byte{}, false
-}
-
-hash :: proc {
-	hash_stream,
-	hash_file,
-	hash_bytes,
-	hash_string,
-	hash_bytes_to_buffer,
-	hash_string_to_buffer,
-}
-
-/*
-    Low level API
-*/
-
 init :: proc(ctx: ^Context) {
 	ctx.state[0] = 0x67452301
 	ctx.state[1] = 0xefcdab89
@@ -134,13 +47,21 @@ update :: proc(ctx: ^Context, data: []byte) {
 	}
 }
 
-final :: proc(ctx: ^Context, hash: []byte) {
+final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
 	assert(ctx.is_initialized)
 
 	if len(hash) < DIGEST_SIZE {
 		panic("crypto/sha1: invalid destination digest size")
 	}
 
+	ctx := ctx
+	if finalize_clone {
+		tmp_ctx: Context
+		clone(&tmp_ctx, ctx)
+		ctx = &tmp_ctx
+	}
+	defer(reset(ctx))
+
 	i := ctx.datalen
 
 	if ctx.datalen < 56 {
@@ -168,8 +89,18 @@ final :: proc(ctx: ^Context, hash: []byte) {
 	for i = 0; i < DIGEST_SIZE / 4; i += 1 {
 		endian.unchecked_put_u32be(hash[i * 4:], ctx.state[i])
 	}
+}
+
+clone :: proc(ctx, other: ^$T) {
+	ctx^ = other^
+}
+
+reset :: proc(ctx: ^$T) {
+	if !ctx.is_initialized {
+		return
+	}
 
-	ctx.is_initialized = false
+	mem.zero_explicit(ctx, size_of(ctx^))
 }
 
 /*
@@ -180,10 +111,10 @@ BLOCK_SIZE :: 64
 
 Context :: struct {
 	data:    [BLOCK_SIZE]byte,
-	datalen: u32,
-	bitlen:  u64,
 	state:   [5]u32,
 	k:       [4]u32,
+	bitlen:  u64,
+	datalen: u32,
 
 	is_initialized: bool,
 }
diff --git a/core/crypto/sha2/sha2.odin b/core/crypto/sha2/sha2.odin
index 10ac73ab6..7fe2f629f 100644
--- a/core/crypto/sha2/sha2.odin
+++ b/core/crypto/sha2/sha2.odin
@@ -12,13 +12,8 @@ package sha2
 */
 
 import "core:encoding/endian"
-import "core:io"
 import "core:math/bits"
-import "core:os"
-
-/*
-    High level API
-*/
+import "core:mem"
 
 DIGEST_SIZE_224 :: 28
 DIGEST_SIZE_256 :: 32
@@ -26,411 +21,33 @@ DIGEST_SIZE_384 :: 48
 DIGEST_SIZE_512 :: 64
 DIGEST_SIZE_512_256 :: 32
 
-// hash_string_224 will hash the given input and return the
-// computed hash
-hash_string_224 :: proc(data: string) -> [DIGEST_SIZE_224]byte {
-	return hash_bytes_224(transmute([]byte)(data))
-}
-
-// hash_bytes_224 will hash the given input and return the
-// computed hash
-hash_bytes_224 :: proc(data: []byte) -> [DIGEST_SIZE_224]byte {
-	hash: [DIGEST_SIZE_224]byte
-	ctx: Context_256
+init_224 :: proc(ctx: ^Context_256) {
 	ctx.md_bits = 224
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_224 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_224 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_224(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_224 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_224 :: proc(data, hash: []byte) {
-	ctx: Context_256
-	ctx.md_bits = 224
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream_224 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_224 :: proc(s: io.Stream) -> ([DIGEST_SIZE_224]byte, bool) {
-	hash: [DIGEST_SIZE_224]byte
-	ctx: Context_256
-	ctx.md_bits = 224
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_224 will read the file provided by the given handle
-// and compute a hash
-hash_file_224 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_224]byte, bool) {
-	if !load_at_once {
-		return hash_stream_224(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_224(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_224]byte{}, false
-}
-
-hash_224 :: proc {
-	hash_stream_224,
-	hash_file_224,
-	hash_bytes_224,
-	hash_string_224,
-	hash_bytes_to_buffer_224,
-	hash_string_to_buffer_224,
-}
-
-// hash_string_256 will hash the given input and return the
-// computed hash
-hash_string_256 :: proc(data: string) -> [DIGEST_SIZE_256]byte {
-	return hash_bytes_256(transmute([]byte)(data))
-}
-
-// hash_bytes_256 will hash the given input and return the
-// computed hash
-hash_bytes_256 :: proc(data: []byte) -> [DIGEST_SIZE_256]byte {
-	hash: [DIGEST_SIZE_256]byte
-	ctx: Context_256
-	ctx.md_bits = 256
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_256 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_256 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_256(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_256 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_256 :: proc(data, hash: []byte) {
-	ctx: Context_256
-	ctx.md_bits = 256
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
+	_init(ctx)
 }
 
-// hash_stream_256 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_256 :: proc(s: io.Stream) -> ([DIGEST_SIZE_256]byte, bool) {
-	hash: [DIGEST_SIZE_256]byte
-	ctx: Context_256
+init_256 :: proc(ctx: ^Context_256) {
 	ctx.md_bits = 256
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_256 will read the file provided by the given handle
-// and compute a hash
-hash_file_256 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_256]byte, bool) {
-	if !load_at_once {
-		return hash_stream_256(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_256(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_256]byte{}, false
-}
-
-hash_256 :: proc {
-	hash_stream_256,
-	hash_file_256,
-	hash_bytes_256,
-	hash_string_256,
-	hash_bytes_to_buffer_256,
-	hash_string_to_buffer_256,
+	_init(ctx)
 }
 
-// hash_string_384 will hash the given input and return the
-// computed hash
-hash_string_384 :: proc(data: string) -> [DIGEST_SIZE_384]byte {
-	return hash_bytes_384(transmute([]byte)(data))
-}
-
-// hash_bytes_384 will hash the given input and return the
-// computed hash
-hash_bytes_384 :: proc(data: []byte) -> [DIGEST_SIZE_384]byte {
-	hash: [DIGEST_SIZE_384]byte
-	ctx: Context_512
-	ctx.md_bits = 384
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_384 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_384 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_384(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_384 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_384 :: proc(data, hash: []byte) {
-	ctx: Context_512
+init_384 :: proc(ctx: ^Context_512) {
 	ctx.md_bits = 384
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
+	_init(ctx)
 }
 
-// hash_stream_384 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_384 :: proc(s: io.Stream) -> ([DIGEST_SIZE_384]byte, bool) {
-	hash: [DIGEST_SIZE_384]byte
-	ctx: Context_512
-	ctx.md_bits = 384
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_384 will read the file provided by the given handle
-// and compute a hash
-hash_file_384 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_384]byte, bool) {
-	if !load_at_once {
-		return hash_stream_384(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_384(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_384]byte{}, false
-}
-
-hash_384 :: proc {
-	hash_stream_384,
-	hash_file_384,
-	hash_bytes_384,
-	hash_string_384,
-	hash_bytes_to_buffer_384,
-	hash_string_to_buffer_384,
-}
-
-// hash_string_512 will hash the given input and return the
-// computed hash
-hash_string_512 :: proc(data: string) -> [DIGEST_SIZE_512]byte {
-	return hash_bytes_512(transmute([]byte)(data))
-}
-
-// hash_bytes_512 will hash the given input and return the
-// computed hash
-hash_bytes_512 :: proc(data: []byte) -> [DIGEST_SIZE_512]byte {
-	hash: [DIGEST_SIZE_512]byte
-	ctx: Context_512
-	ctx.md_bits = 512
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_512 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_512 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_512(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_512 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_512 :: proc(data, hash: []byte) {
-	ctx: Context_512
-	ctx.md_bits = 512
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream_512 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_512 :: proc(s: io.Stream) -> ([DIGEST_SIZE_512]byte, bool) {
-	hash: [DIGEST_SIZE_512]byte
-	ctx: Context_512
+init_512 :: proc(ctx: ^Context_512) {
 	ctx.md_bits = 512
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
+	_init(ctx)
 }
 
-// hash_file_512 will read the file provided by the given handle
-// and compute a hash
-hash_file_512 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_512]byte, bool) {
-	if !load_at_once {
-		return hash_stream_512(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_512(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_512]byte{}, false
-}
-
-hash_512 :: proc {
-	hash_stream_512,
-	hash_file_512,
-	hash_bytes_512,
-	hash_string_512,
-	hash_bytes_to_buffer_512,
-	hash_string_to_buffer_512,
-}
-
-// hash_string_512_256 will hash the given input and return the
-// computed hash
-hash_string_512_256 :: proc(data: string) -> [DIGEST_SIZE_512_256]byte {
-	return hash_bytes_512_256(transmute([]byte)(data))
-}
-
-// hash_bytes_512_256 will hash the given input and return the
-// computed hash
-hash_bytes_512_256 :: proc(data: []byte) -> [DIGEST_SIZE_512_256]byte {
-	hash: [DIGEST_SIZE_512_256]byte
-	ctx: Context_512
+init_512_256 :: proc(ctx: ^Context_512) {
 	ctx.md_bits = 256
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
+	_init(ctx)
 }
 
-// hash_string_to_buffer_512_256 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_512_256 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_512_256(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_512_256 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_512_256 :: proc(data, hash: []byte) {
-	ctx: Context_512
-	ctx.md_bits = 256
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream_512_256 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_512_256 :: proc(s: io.Stream) -> ([DIGEST_SIZE_512_256]byte, bool) {
-	hash: [DIGEST_SIZE_512_256]byte
-	ctx: Context_512
-	ctx.md_bits = 256
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_512_256 will read the file provided by the given handle
-// and compute a hash
-hash_file_512_256 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_512_256]byte, bool) {
-	if !load_at_once {
-		return hash_stream_512_256(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_512_256(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_512_256]byte{}, false
-}
-
-hash_512_256 :: proc {
-	hash_stream_512_256,
-	hash_file_512_256,
-	hash_bytes_512_256,
-	hash_string_512_256,
-	hash_bytes_to_buffer_512_256,
-	hash_string_to_buffer_512_256,
-}
-
-/*
-    Low level API
-*/
-
-init :: proc(ctx: ^$T) {
+@(private)
+_init :: proc(ctx: ^$T) {
 	when T == Context_256 {
 		switch ctx.md_bits {
 		case 224:
@@ -528,13 +145,21 @@ update :: proc(ctx: ^$T, data: []byte) {
 	}
 }
 
-final :: proc(ctx: ^$T, hash: []byte) {
+final :: proc(ctx: ^$T, hash: []byte, finalize_clone: bool = false) {
 	assert(ctx.is_initialized)
 
 	if len(hash) * 8 < ctx.md_bits {
 		panic("crypto/sha2: invalid destination digest size")
 	}
 
+	ctx := ctx
+	if finalize_clone {
+		tmp_ctx: T
+		clone(&tmp_ctx, ctx)
+		ctx = &tmp_ctx
+	}
+	defer(reset(ctx))
+
 	length := ctx.length
 
 	raw_pad: [SHA512_BLOCK_SIZE]byte
@@ -576,8 +201,18 @@ final :: proc(ctx: ^$T, hash: []byte) {
 			endian.unchecked_put_u64be(hash[i * 8:], ctx.h[i])
 		}
 	}
+}
+
+clone :: proc(ctx, other: ^$T) {
+	ctx^ = other^
+}
+
+reset :: proc(ctx: ^$T) {
+	if !ctx.is_initialized {
+		return
+	}
 
-	ctx.is_initialized = false
+	mem.zero_explicit(ctx, size_of(ctx^))
 }
 
 /*
diff --git a/core/crypto/sha3/sha3.odin b/core/crypto/sha3/sha3.odin
index f91baad3d..93ad737eb 100644
--- a/core/crypto/sha3/sha3.odin
+++ b/core/crypto/sha3/sha3.odin
@@ -7,358 +7,57 @@ package sha3
     List of contributors:
         zhibog, dotbmp:  Initial implementation.
 
-    Interface for the SHA3 hashing algorithm. The SHAKE functionality can be found in package shake.
-    If you wish to compute a Keccak hash, you can use the keccak package, it will use the original padding.
+    Interface for the SHA3 hashing algorithm. The SHAKE functionality can
+    be found in package shake.  If you wish to compute a Keccak hash, you
+    can use the legacy/keccak package, it will use the original padding.
 */
 
-import "core:io"
-import "core:os"
-
 import "../_sha3"
 
-/*
-    High level API
-*/
-
 DIGEST_SIZE_224 :: 28
 DIGEST_SIZE_256 :: 32
 DIGEST_SIZE_384 :: 48
 DIGEST_SIZE_512 :: 64
 
-// hash_string_224 will hash the given input and return the
-// computed hash
-hash_string_224 :: proc(data: string) -> [DIGEST_SIZE_224]byte {
-	return hash_bytes_224(transmute([]byte)(data))
-}
-
-// hash_bytes_224 will hash the given input and return the
-// computed hash
-hash_bytes_224 :: proc(data: []byte) -> [DIGEST_SIZE_224]byte {
-	hash: [DIGEST_SIZE_224]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_224
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_224 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_224 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_224(transmute([]byte)(data), hash)
-}
+Context :: distinct _sha3.Context
 
-// hash_bytes_to_buffer_224 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_224 :: proc(data, hash: []byte) {
-	ctx: Context
+init_224 :: proc(ctx: ^Context) {
 	ctx.mdlen = DIGEST_SIZE_224
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
+	_init(ctx)
 }
 
-// hash_stream_224 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_224 :: proc(s: io.Stream) -> ([DIGEST_SIZE_224]byte, bool) {
-	hash: [DIGEST_SIZE_224]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_224
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_224 will read the file provided by the given handle
-// and compute a hash
-hash_file_224 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_224]byte, bool) {
-	if !load_at_once {
-		return hash_stream_224(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_224(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_224]byte{}, false
-}
-
-hash_224 :: proc {
-	hash_stream_224,
-	hash_file_224,
-	hash_bytes_224,
-	hash_string_224,
-	hash_bytes_to_buffer_224,
-	hash_string_to_buffer_224,
-}
-
-// hash_string_256 will hash the given input and return the
-// computed hash
-hash_string_256 :: proc(data: string) -> [DIGEST_SIZE_256]byte {
-	return hash_bytes_256(transmute([]byte)(data))
-}
-
-// hash_bytes_256 will hash the given input and return the
-// computed hash
-hash_bytes_256 :: proc(data: []byte) -> [DIGEST_SIZE_256]byte {
-	hash: [DIGEST_SIZE_256]byte
-	ctx: Context
+init_256 :: proc(ctx: ^Context) {
 	ctx.mdlen = DIGEST_SIZE_256
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_256 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_256 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_256(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_256 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_256 :: proc(data, hash: []byte) {
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_256
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream_256 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_256 :: proc(s: io.Stream) -> ([DIGEST_SIZE_256]byte, bool) {
-	hash: [DIGEST_SIZE_256]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_256
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_256 will read the file provided by the given handle
-// and compute a hash
-hash_file_256 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_256]byte, bool) {
-	if !load_at_once {
-		return hash_stream_256(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_256(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_256]byte{}, false
-}
-
-hash_256 :: proc {
-	hash_stream_256,
-	hash_file_256,
-	hash_bytes_256,
-	hash_string_256,
-	hash_bytes_to_buffer_256,
-	hash_string_to_buffer_256,
+	_init(ctx)
 }
 
-// hash_string_384 will hash the given input and return the
-// computed hash
-hash_string_384 :: proc(data: string) -> [DIGEST_SIZE_384]byte {
-	return hash_bytes_384(transmute([]byte)(data))
-}
-
-// hash_bytes_384 will hash the given input and return the
-// computed hash
-hash_bytes_384 :: proc(data: []byte) -> [DIGEST_SIZE_384]byte {
-	hash: [DIGEST_SIZE_384]byte
-	ctx: Context
+init_384 :: proc(ctx: ^Context) {
 	ctx.mdlen = DIGEST_SIZE_384
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_384 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_384 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_384(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_384 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_384 :: proc(data, hash: []byte) {
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_384
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream_384 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_384 :: proc(s: io.Stream) -> ([DIGEST_SIZE_384]byte, bool) {
-	hash: [DIGEST_SIZE_384]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_384
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_384 will read the file provided by the given handle
-// and compute a hash
-hash_file_384 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_384]byte, bool) {
-	if !load_at_once {
-		return hash_stream_384(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_384(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_384]byte{}, false
-}
-
-hash_384 :: proc {
-	hash_stream_384,
-	hash_file_384,
-	hash_bytes_384,
-	hash_string_384,
-	hash_bytes_to_buffer_384,
-	hash_string_to_buffer_384,
-}
-
-// hash_string_512 will hash the given input and return the
-// computed hash
-hash_string_512 :: proc(data: string) -> [DIGEST_SIZE_512]byte {
-	return hash_bytes_512(transmute([]byte)(data))
+	_init(ctx)
 }
 
-// hash_bytes_512 will hash the given input and return the
-// computed hash
-hash_bytes_512 :: proc(data: []byte) -> [DIGEST_SIZE_512]byte {
-	hash: [DIGEST_SIZE_512]byte
-	ctx: Context
+init_512 :: proc(ctx: ^Context) {
 	ctx.mdlen = DIGEST_SIZE_512
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_512 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_512 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_512(transmute([]byte)(data), hash)
+	_init(ctx)
 }
 
-// hash_bytes_to_buffer_512 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_512 :: proc(data, hash: []byte) {
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_512
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream_512 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_512 :: proc(s: io.Stream) -> ([DIGEST_SIZE_512]byte, bool) {
-	hash: [DIGEST_SIZE_512]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_512
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
+@(private)
+_init :: proc(ctx: ^Context) {
+	_sha3.init(transmute(^_sha3.Context)(ctx))
 }
 
-// hash_file_512 will read the file provided by the given handle
-// and compute a hash
-hash_file_512 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_512]byte, bool) {
-	if !load_at_once {
-		return hash_stream_512(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_512(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_512]byte{}, false
-}
-
-hash_512 :: proc {
-	hash_stream_512,
-	hash_file_512,
-	hash_bytes_512,
-	hash_string_512,
-	hash_bytes_to_buffer_512,
-	hash_string_to_buffer_512,
+update :: proc(ctx: ^Context, data: []byte) {
+	_sha3.update(transmute(^_sha3.Context)(ctx), data)
 }
 
-/*
-    Low level API
-*/
-
-Context :: _sha3.Sha3_Context
-
-init :: proc(ctx: ^Context) {
-	_sha3.init(ctx)
+final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
+	_sha3.final(transmute(^_sha3.Context)(ctx), hash, finalize_clone)
 }
 
-update :: proc(ctx: ^Context, data: []byte) {
-	_sha3.update(ctx, data)
+clone :: proc(ctx, other: ^Context) {
+	_sha3.clone(transmute(^_sha3.Context)(ctx), transmute(^_sha3.Context)(other))
 }
 
-final :: proc(ctx: ^Context, hash: []byte) {
-	_sha3.final(ctx, hash)
+reset :: proc(ctx: ^Context) {
+	_sha3.reset(transmute(^_sha3.Context)(ctx))
 }
diff --git a/core/crypto/shake/shake.odin b/core/crypto/shake/shake.odin
index e4b4c1e31..7ba7138a3 100644
--- a/core/crypto/shake/shake.odin
+++ b/core/crypto/shake/shake.odin
@@ -7,200 +7,67 @@ package shake
     List of contributors:
         zhibog, dotbmp:  Initial implementation.
 
-    Interface for the SHAKE hashing algorithm.
-    The SHA3 functionality can be found in package sha3.
+    Interface for the SHAKE XOF.  The SHA3 hashing algorithm can be found
+    in package sha3.
 
-    TODO: This should provide an incremental squeeze interface, in addition
-    to the one-shot final call.
+    TODO:
+    - This should provide an incremental squeeze interface.
+    - DIGEST_SIZE is inaccurate, SHAKE-128 and SHAKE-256 are security
+      strengths.
 */
 
-import "core:io"
-import "core:os"
-
 import "../_sha3"
 
-/*
-    High level API
-*/
-
 DIGEST_SIZE_128 :: 16
 DIGEST_SIZE_256 :: 32
 
-// hash_string_128 will hash the given input and return the
-// computed hash
-hash_string_128 :: proc(data: string) -> [DIGEST_SIZE_128]byte {
-	return hash_bytes_128(transmute([]byte)(data))
-}
+Context :: distinct _sha3.Context
 
-// hash_bytes_128 will hash the given input and return the
-// computed hash
-hash_bytes_128 :: proc(data: []byte) -> [DIGEST_SIZE_128]byte {
-	hash: [DIGEST_SIZE_128]byte
-	ctx: Context
+init_128 :: proc(ctx: ^Context) {
 	ctx.mdlen = DIGEST_SIZE_128
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_128 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_128 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_128(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_128 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_128 :: proc(data, hash: []byte) {
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_128
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream_128 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_128 :: proc(s: io.Stream) -> ([DIGEST_SIZE_128]byte, bool) {
-	hash: [DIGEST_SIZE_128]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_128
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file_128 will read the file provided by the given handle
-// and compute a hash
-hash_file_128 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_128]byte, bool) {
-	if !load_at_once {
-		return hash_stream_128(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_128(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE_128]byte{}, false
-}
-
-hash_128 :: proc {
-	hash_stream_128,
-	hash_file_128,
-	hash_bytes_128,
-	hash_string_128,
-	hash_bytes_to_buffer_128,
-	hash_string_to_buffer_128,
+	_init(ctx)
 }
 
-// hash_string_256 will hash the given input and return the
-// computed hash
-hash_string_256 :: proc(data: string) -> [DIGEST_SIZE_256]byte {
-	return hash_bytes_256(transmute([]byte)(data))
-}
-
-// hash_bytes_256 will hash the given input and return the
-// computed hash
-hash_bytes_256 :: proc(data: []byte) -> [DIGEST_SIZE_256]byte {
-	hash: [DIGEST_SIZE_256]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_256
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer_256 will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer_256 :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer_256(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer_256 will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer_256 :: proc(data, hash: []byte) {
-	ctx: Context
+init_256 :: proc(ctx: ^Context) {
 	ctx.mdlen = DIGEST_SIZE_256
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
+	_init(ctx)
 }
 
-// hash_stream_256 will read the stream in chunks and compute a
-// hash from its contents
-hash_stream_256 :: proc(s: io.Stream) -> ([DIGEST_SIZE_256]byte, bool) {
-	hash: [DIGEST_SIZE_256]byte
-	ctx: Context
-	ctx.mdlen = DIGEST_SIZE_256
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
+@(private)
+_init :: proc(ctx: ^Context) {
+	_sha3.init(transmute(^_sha3.Context)(ctx))
 }
 
-// hash_file_256 will read the file provided by the given handle
-// and compute a hash
-hash_file_256 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_256]byte, bool) {
-	if !load_at_once {
-		return hash_stream_256(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes_256(buf[:]), ok
-		}
+update :: proc(ctx: ^Context, data: []byte) {
+	_sha3.update(transmute(^_sha3.Context)(ctx), data)
+}
+
+final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
+	// Rolling digest support is handled here instead of in the generic
+	// _sha3 package as SHAKE is more of an XOF than a hash, so the
+	// standard notion of "final", doesn't really exist when you can
+	// squeeze an unlimited amount of data.
+	//
+	// TODO/yawning: Strongly consider getting rid of this and rigidly
+	// defining SHAKE as an XOF.
+
+	ctx := ctx
+	if finalize_clone {
+		tmp_ctx: Context
+		clone(&tmp_ctx, ctx)
+		ctx = &tmp_ctx
 	}
-	return [DIGEST_SIZE_256]byte{}, false
-}
-
-hash_256 :: proc {
-	hash_stream_256,
-	hash_file_256,
-	hash_bytes_256,
-	hash_string_256,
-	hash_bytes_to_buffer_256,
-	hash_string_to_buffer_256,
-}
+	defer(reset(ctx))
 
-/*
-    Low level API
-*/
-
-Context :: _sha3.Sha3_Context
-
-init :: proc(ctx: ^Context) {
-	_sha3.init(ctx)
+	ctx_ := transmute(^_sha3.Context)(ctx)
+	_sha3.shake_xof(ctx_)
+	_sha3.shake_out(ctx_, hash[:])
 }
 
-update :: proc(ctx: ^Context, data: []byte) {
-	_sha3.update(ctx, data)
+clone :: proc(ctx, other: ^Context) {
+	_sha3.clone(transmute(^_sha3.Context)(ctx), transmute(^_sha3.Context)(other))
 }
 
-final :: proc(ctx: ^Context, hash: []byte) {
-	_sha3.shake_xof(ctx)
-	_sha3.shake_out(ctx, hash[:])
+reset :: proc(ctx: ^Context) {
+	_sha3.reset(transmute(^_sha3.Context)(ctx))
 }
diff --git a/core/crypto/sm3/sm3.odin b/core/crypto/sm3/sm3.odin
index 7a7a0b8a6..6699d5d5a 100644
--- a/core/crypto/sm3/sm3.odin
+++ b/core/crypto/sm3/sm3.odin
@@ -11,97 +11,11 @@ package sm3
 */
 
 import "core:encoding/endian"
-import "core:io"
 import "core:math/bits"
-import "core:os"
-
-/*
-    High level API
-*/
+import "core:mem"
 
 DIGEST_SIZE :: 32
 
-// hash_string will hash the given input and return the
-// computed hash
-hash_string :: proc(data: string) -> [DIGEST_SIZE]byte {
-	return hash_bytes(transmute([]byte)(data))
-}
-
-// hash_bytes will hash the given input and return the
-// computed hash
-hash_bytes :: proc(data: []byte) -> [DIGEST_SIZE]byte {
-	hash: [DIGEST_SIZE]byte
-	ctx: Context
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash[:])
-	return hash
-}
-
-// hash_string_to_buffer will hash the given input and assign the
-// computed hash to the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_string_to_buffer :: proc(data: string, hash: []byte) {
-	hash_bytes_to_buffer(transmute([]byte)(data), hash)
-}
-
-// hash_bytes_to_buffer will hash the given input and write the
-// computed hash into the second parameter.
-// It requires that the destination buffer is at least as big as the digest size
-hash_bytes_to_buffer :: proc(data, hash: []byte) {
-	ctx: Context
-	init(&ctx)
-	update(&ctx, data)
-	final(&ctx, hash)
-}
-
-// hash_stream will read the stream in chunks and compute a
-// hash from its contents
-hash_stream :: proc(s: io.Stream) -> ([DIGEST_SIZE]byte, bool) {
-	hash: [DIGEST_SIZE]byte
-	ctx: Context
-	init(&ctx)
-
-	buf := make([]byte, 512)
-	defer delete(buf)
-
-	read := 1
-	for read > 0 {
-		read, _ = io.read(s, buf)
-		if read > 0 {
-			update(&ctx, buf[:read])
-		}
-	}
-	final(&ctx, hash[:])
-	return hash, true
-}
-
-// hash_file will read the file provided by the given handle
-// and compute a hash
-hash_file :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE]byte, bool) {
-	if !load_at_once {
-		return hash_stream(os.stream_from_handle(hd))
-	} else {
-		if buf, ok := os.read_entire_file(hd); ok {
-			return hash_bytes(buf[:]), ok
-		}
-	}
-	return [DIGEST_SIZE]byte{}, false
-}
-
-hash :: proc {
-	hash_stream,
-	hash_file,
-	hash_bytes,
-	hash_string,
-	hash_bytes_to_buffer,
-	hash_string_to_buffer,
-}
-
-/*
-    Low level API
-*/
-
 init :: proc(ctx: ^Context) {
 	ctx.state[0] = IV[0]
 	ctx.state[1] = IV[1]
@@ -143,13 +57,21 @@ update :: proc(ctx: ^Context, data: []byte) {
 	}
 }
 
-final :: proc(ctx: ^Context, hash: []byte) {
+final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
 	assert(ctx.is_initialized)
 
 	if len(hash) < DIGEST_SIZE {
 		panic("crypto/sm3: invalid destination digest size")
 	}
 
+	ctx := ctx
+	if finalize_clone {
+		tmp_ctx: Context
+		clone(&tmp_ctx, ctx)
+		ctx = &tmp_ctx
+	}
+	defer(reset(ctx))
+
 	length := ctx.length
 
 	pad: [BLOCK_SIZE]byte
@@ -168,8 +90,18 @@ final :: proc(ctx: ^Context, hash: []byte) {
 	for i := 0; i < DIGEST_SIZE / 4; i += 1 {
 		endian.unchecked_put_u32be(hash[i * 4:], ctx.state[i])
 	}
+}
+
+clone :: proc(ctx, other: ^Context) {
+	ctx^ = other^
+}
+
+reset :: proc(ctx: ^Context) {
+	if !ctx.is_initialized {
+		return
+	}
 
-	ctx.is_initialized = false
+	mem.zero_explicit(ctx, size_of(ctx^))
 }
 
 /*
diff --git a/examples/all/all_main.odin b/examples/all/all_main.odin
index 5f03508df..c9953bf11 100644
--- a/examples/all/all_main.odin
+++ b/examples/all/all_main.odin
@@ -27,6 +27,7 @@ import blake2b          "core:crypto/blake2b"
 import blake2s          "core:crypto/blake2s"
 import chacha20         "core:crypto/chacha20"
 import chacha20poly1305 "core:crypto/chacha20poly1305"
+import crypto_hash      "core:crypto/hash"
 import keccak           "core:crypto/legacy/keccak"
 import md5              "core:crypto/legacy/md5"
 import sha1             "core:crypto/legacy/sha1"
@@ -137,6 +138,7 @@ _ :: lru
 _ :: list
 _ :: topological_sort
 _ :: crypto
+_ :: crypto_hash
 _ :: blake2b
 _ :: blake2s
 _ :: chacha20
diff --git a/tests/core/crypto/test_core_crypto.odin b/tests/core/crypto/test_core_crypto.odin
index 0e347a702..7bcc71476 100644
--- a/tests/core/crypto/test_core_crypto.odin
+++ b/tests/core/crypto/test_core_crypto.odin
@@ -14,18 +14,8 @@ package test_core_crypto
 
 import "core:testing"
 import "core:fmt"
-import "core:strings"
 
-import "core:crypto/sha2"
-import "core:crypto/sha3"
-import "core:crypto/shake"
-import "core:crypto/blake2b"
-import "core:crypto/blake2s"
-import "core:crypto/sm3"
 import "core:crypto/siphash"
-import "core:crypto/legacy/keccak"
-import "core:crypto/legacy/md5"
-import "core:crypto/legacy/sha1"
 import "core:os"
 
 TEST_count := 0
@@ -51,26 +41,8 @@ when ODIN_TEST {
 
 main :: proc() {
 	t := testing.T{}
-	test_md5(&t)
-	test_sha1(&t)
-	test_sha224(&t)
-	test_sha256(&t)
-	test_sha384(&t)
-	test_sha512(&t)
-	test_sha512_256(&t)
-	test_sha3_224(&t)
-	test_sha3_256(&t)
-	test_sha3_384(&t)
-	test_sha3_512(&t)
-	test_shake_128(&t)
-	test_shake_256(&t)
-	test_keccak_224(&t)
-	test_keccak_256(&t)
-	test_keccak_384(&t)
-	test_keccak_512(&t)
-	test_blake2b(&t)
-	test_blake2s(&t)
-	test_sm3(&t)
+	test_hash(&t)
+
 	test_siphash_2_4(&t)
 
 	// "modern" crypto tests
@@ -88,11 +60,6 @@ main :: proc() {
 	}
 }
 
-TestHash :: struct {
-	hash: string,
-	str:  string,
-}
-
 hex_string :: proc(bytes: []byte, allocator := context.temp_allocator) -> string {
 	lut: [16]byte = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}
 	buf := make([]byte, len(bytes) * 2, allocator)
@@ -104,359 +71,6 @@ hex_string :: proc(bytes: []byte, allocator := context.temp_allocator) -> string
 }
 
 @(test)
-test_md5 :: proc(t: ^testing.T) {
-	// Official test vectors from https://datatracker.ietf.org/doc/html/rfc1321
-	test_vectors := [?]TestHash {
-		TestHash{"d41d8cd98f00b204e9800998ecf8427e", ""},
-		TestHash{"0cc175b9c0f1b6a831c399e269772661", "a"},
-		TestHash{"900150983cd24fb0d6963f7d28e17f72", "abc"},
-		TestHash{"f96b697d7cb7938d525a2f31aaf161d0", "message digest"},
-		TestHash{"c3fcd3d76192e4007dfb496cca67e13b", "abcdefghijklmnopqrstuvwxyz"},
-		TestHash{"d174ab98d277d9f5a5611c2c9f419d9f", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"},
-		TestHash{"57edf4a22be3c955ac49da2e2107b67a", "12345678901234567890123456789012345678901234567890123456789012345678901234567890"},
-	}
-	for v, _ in test_vectors {
-		computed     := md5.hash(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sha1 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"da39a3ee5e6b4b0d3255bfef95601890afd80709", ""},
-		TestHash{"a9993e364706816aba3e25717850c26c9cd0d89d", "abc"},
-		TestHash{"f9537c23893d2014f365adf8ffe33b8eb0297ed1", "abcdbcdecdefdefgefghfghighijhi"},
-		TestHash{"346fb528a24b48f563cb061470bcfd23740427ad", "jkijkljklmklmnlmnomnopnopq"},
-		TestHash{"86f7e437faa5a7fce15d1ddcb9eaeaea377667b8", "a"},
-		TestHash{"c729c8996ee0a6f74f4f3248e8957edf704fb624", "01234567012345670123456701234567"},
-		TestHash{"84983e441c3bd26ebaae4aa1f95129e5e54670f1", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
-		TestHash{"a49b2446a02c645bf419f995b67091253a04a259", "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"},
-	}
-	for v, _ in test_vectors {
-		computed     := sha1.hash(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sha224 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	// https://datatracker.ietf.org/doc/html/rfc3874#section-3.3
-    data_1_000_000_a := strings.repeat("a", 1_000_000)
-	test_vectors := [?]TestHash {
-		TestHash{"d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f", ""},
-		TestHash{"23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7", "abc"},
-		TestHash{"75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
-		TestHash{"c97ca9a559850ce97a04a96def6d99a9e0e0e2ab14e6b8df265fc0b3", "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"},
-		TestHash{"20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67", data_1_000_000_a},
-	}
-	for v, _ in test_vectors {
-		computed     := sha2.hash_224(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sha256 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", ""},
-		TestHash{"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad", "abc"},
-		TestHash{"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
-		TestHash{"cf5b16a778af8380036ce59e7b0492370b249b11e8f07a51afac45037afee9d1", "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"},
-	}
-	for v, _ in test_vectors {
-		computed     := sha2.hash_256(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sha384 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da274edebfe76f65fbd51ad2f14898b95b", ""},
-		TestHash{"cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed8086072ba1e7cc2358baeca134c825a7", "abc"},
-		TestHash{"3391fdddfc8dc7393707a65b1b4709397cf8b1d162af05abfe8f450de5f36bc6b0455a8520bc4e6f5fe95b1fe3c8452b", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
-		TestHash{"09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712fcc7c71a557e2db966c3e9fa91746039", "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"},
-	}
-	for v, _ in test_vectors {
-		computed     := sha2.hash_384(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sha512 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e", ""},
-		TestHash{"ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f", "abc"},
-		TestHash{"204a8fc6dda82f0a0ced7beb8e08a41657c16ef468b228a8279be331a703c33596fd15c13b1b07f9aa1d3bea57789ca031ad85c7a71dd70354ec631238ca3445", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
-		TestHash{"8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909", "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"},
-	}
-	for v, _ in test_vectors {
-		computed     := sha2.hash_512(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sha512_256 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	test_vectors := [?]TestHash {
-		TestHash{"53048e2681941ef99b2e29b76b4c7dabe4c2d0c634fc6d46e0e2f13107e7af23", "abc"},
-		TestHash{"3928e184fb8690f840da3988121d31be65cb9d3ef83ee6146feac861e19b563a", "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"},
-	}
-	for v, _ in test_vectors {
-		computed     := sha2.hash_512_256(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sha3_224 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"6b4e03423667dbb73b6e15454f0eb1abd4597f9a1b078e3f5b5a6bc7", ""},
-		TestHash{"e642824c3f8cf24ad09234ee7d3c766fc9a3a5168d0c94ad73b46fdf", "abc"},
-		TestHash{"10241ac5187380bd501192e4e56b5280908727dd8fe0d10d4e5ad91e", "abcdbcdecdefdefgefghfghighijhi"},
-		TestHash{"fd645fe07d814c397e85e85f92fe58b949f55efa4d3468b2468da45a", "jkijkljklmklmnlmnomnopnopq"},
-		TestHash{"9e86ff69557ca95f405f081269685b38e3a819b309ee942f482b6a8b", "a"},
-		TestHash{"6961f694b2ff3ed6f0c830d2c66da0c5e7ca9445f7c0dca679171112", "01234567012345670123456701234567"},
-		TestHash{"8a24108b154ada21c9fd5574494479ba5c7e7ab76ef264ead0fcce33", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
-		TestHash{"543e6868e1666c1a643630df77367ae5a62a85070a51c14cbf665cbc", "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"},
-	}
-	for v, _ in test_vectors {
-		computed     := sha3.hash_224(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sha3_256 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"a7ffc6f8bf1ed76651c14756a061d662f580ff4de43b49fa82d80a4b80f8434a", ""},
-		TestHash{"3a985da74fe225b2045c172d6bd390bd855f086e3e9d525b46bfe24511431532", "abc"},
-		TestHash{"565ada1ced21278cfaffdde00dea0107964121ac25e4e978abc59412be74550a", "abcdbcdecdefdefgefghfghighijhi"},
-		TestHash{"8cc1709d520f495ce972ece48b0d2e1f74ec80d53bc5c47457142158fae15d98", "jkijkljklmklmnlmnomnopnopq"},
-		TestHash{"80084bf2fba02475726feb2cab2d8215eab14bc6bdd8bfb2c8151257032ecd8b", "a"},
-		TestHash{"e4786de5f88f7d374b7288f225ea9f2f7654da200bab5d417e1fb52d49202767", "01234567012345670123456701234567"},
-		TestHash{"41c0dba2a9d6240849100376a8235e2c82e1b9998a999e21db32dd97496d3376", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
-		TestHash{"916f6061fe879741ca6469b43971dfdb28b1a32dc36cb3254e812be27aad1d18", "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"},
-	}
-	for v, _ in test_vectors {
-		computed     := sha3.hash_256(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sha3_384 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"0c63a75b845e4f7d01107d852e4c2485c51a50aaaa94fc61995e71bbee983a2ac3713831264adb47fb6bd1e058d5f004", ""},
-		TestHash{"ec01498288516fc926459f58e2c6ad8df9b473cb0fc08c2596da7cf0e49be4b298d88cea927ac7f539f1edf228376d25", "abc"},
-		TestHash{"9aa92dbb716ebb573def0d5e3cdd28d6add38ada310b602b8916e690a3257b7144e5ddd3d0dbbc559c48480d34d57a9a", "abcdbcdecdefdefgefghfghighijhi"},
-		TestHash{"77c90323d7392bcdee8a3e7f74f19f47b7d1b1a825ac6a2d8d882a72317879cc26597035f1fc24fe65090b125a691282", "jkijkljklmklmnlmnomnopnopq"},
-		TestHash{"1815f774f320491b48569efec794d249eeb59aae46d22bf77dafe25c5edc28d7ea44f93ee1234aa88f61c91912a4ccd9", "a"},
-		TestHash{"51072590ad4c51b27ff8265590d74f92de7cc55284168e414ca960087c693285b08a283c6b19d77632994cb9eb93f1be", "01234567012345670123456701234567"},
-		TestHash{"991c665755eb3a4b6bbdfb75c78a492e8c56a22c5c4d7e429bfdbc32b9d4ad5aa04a1f076e62fea19eef51acd0657c22", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
-		TestHash{"79407d3b5916b59c3e30b09822974791c313fb9ecc849e406f23592d04f625dc8c709b98b43b3852b337216179aa7fc7", "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"},
-	}
-	for v, _ in test_vectors {
-		computed     := sha3.hash_384(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sha3_512 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"a69f73cca23a9ac5c8b567dc185a756e97c982164fe25859e0d1dcc1475c80a615b2123af1f5f94c11e3e9402c3ac558f500199d95b6d3e301758586281dcd26", ""},
-		TestHash{"b751850b1a57168a5693cd924b6b096e08f621827444f70d884f5d0240d2712e10e116e9192af3c91a7ec57647e3934057340b4cf408d5a56592f8274eec53f0", "abc"},
-		TestHash{"9f9a327944a35988d67effc4fa748b3c07744f736ac70b479d8e12a3d10d6884d00a7ef593690305462e9e9030a67c51636fd346fd8fa0ee28a5ac2aee103d2e", "abcdbcdecdefdefgefghfghighijhi"},
-		TestHash{"dbb124a0deda966eb4d199d0844fa0beb0770ea1ccddabcd335a7939a931ac6fb4fa6aebc6573f462ced2e4e7178277803be0d24d8bc2864626d9603109b7891", "jkijkljklmklmnlmnomnopnopq"},
-		TestHash{"697f2d856172cb8309d6b8b97dac4de344b549d4dee61edfb4962d8698b7fa803f4f93ff24393586e28b5b957ac3d1d369420ce53332712f997bd336d09ab02a", "a"},
-		TestHash{"5679e353bc8eeea3e801ca60448b249bcfd3ac4a6c3abe429a807bcbd4c9cd12da87a5a9dc74fde64c0d44718632cae966b078397c6f9ec155c6a238f2347cf1", "01234567012345670123456701234567"},
-		TestHash{"04a371e84ecfb5b8b77cb48610fca8182dd457ce6f326a0fd3d7ec2f1e91636dee691fbe0c985302ba1b0d8dc78c086346b533b49c030d99a27daf1139d6e75e", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
-		TestHash{"afebb2ef542e6579c50cad06d2e578f9f8dd6881d7dc824d26360feebf18a4fa73e3261122948efcfd492e74e82e2189ed0fb440d187f382270cb455f21dd185", "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"},
-	}
-	for v, _ in test_vectors {
-		computed     := sha3.hash_512(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_shake_128 :: proc(t: ^testing.T) {
-	test_vectors := [?]TestHash {
-		TestHash{"7f9c2ba4e88f827d616045507605853e", ""},
-		TestHash{"f4202e3c5852f9182a0430fd8144f0a7", "The quick brown fox jumps over the lazy dog"},
-		TestHash{"853f4538be0db9621a6cea659a06c110", "The quick brown fox jumps over the lazy dof"},
-	}
-	for v, _ in test_vectors {
-		computed     := shake.hash_128(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_shake_256 :: proc(t: ^testing.T) {
-	test_vectors := [?]TestHash {
-		TestHash{"46b9dd2b0ba88d13233b3feb743eeb243fcd52ea62b81b82b50c27646ed5762f", ""},
-		TestHash{"2f671343d9b2e1604dc9dcf0753e5fe15c7c64a0d283cbbf722d411a0e36f6ca", "The quick brown fox jumps over the lazy dog"},
-		TestHash{"46b1ebb2e142c38b9ac9081bef72877fe4723959640fa57119b366ce6899d401", "The quick brown fox jumps over the lazy dof"},
-	}
-	for v, _ in test_vectors {
-		computed     := shake.hash_256(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_keccak_224 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"f71837502ba8e10837bdd8d365adb85591895602fc552b48b7390abd", ""},
-		TestHash{"c30411768506ebe1c2871b1ee2e87d38df342317300a9b97a95ec6a8", "abc"},
-	}
-	for v, _ in test_vectors {
-		computed     := keccak.hash_224(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_keccak_256 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", ""},
-		TestHash{"4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45", "abc"},
-	}
-	for v, _ in test_vectors {
-		computed     := keccak.hash_256(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_keccak_384 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"2c23146a63a29acf99e73b88f8c24eaa7dc60aa771780ccc006afbfa8fe2479b2dd2b21362337441ac12b515911957ff", ""},
-		TestHash{"f7df1165f033337be098e7d288ad6a2f74409d7a60b49c36642218de161b1f99f8c681e4afaf31a34db29fb763e3c28e", "abc"},
-	}
-	for v, _ in test_vectors {
-		computed     := keccak.hash_384(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_keccak_512 :: proc(t: ^testing.T) {
-	// Test vectors from
-	// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
-	// https://www.di-mgt.com.au/sha_testvectors.html
-	test_vectors := [?]TestHash {
-		TestHash{"0eab42de4c3ceb9235fc91acffe746b29c29a8c366b7c60e4e67c466f36a4304c00fa9caf9d87976ba469bcbe06713b435f091ef2769fb160cdab33d3670680e", ""},
-		TestHash{"18587dc2ea106b9a1563e32b3312421ca164c7f1f07bc922a9c83d77cea3a1e5d0c69910739025372dc14ac9642629379540c17e2a65b19d77aa511a9d00bb96", "abc"},
-	}
-	for v, _ in test_vectors {
-		computed     := keccak.hash_512(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_blake2b :: proc(t: ^testing.T) {
-	test_vectors := [?]TestHash {
-		TestHash{"786a02f742015903c6c6fd852552d272912f4740e15847618a86e217f71f5419d25e1031afee585313896444934eb04b903a685b1448b755d56f701afe9be2ce", ""},
-		TestHash{"a8add4bdddfd93e4877d2746e62817b116364a1fa7bc148d95090bc7333b3673f82401cf7aa2e4cb1ecd90296e3f14cb5413f8ed77be73045b13914cdcd6a918", "The quick brown fox jumps over the lazy dog"},
-	}
-	for v, _ in test_vectors {
-		computed     := blake2b.hash(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_blake2s :: proc(t: ^testing.T) {
-	test_vectors := [?]TestHash {
-		TestHash{"69217a3079908094e11121d042354a7c1f55b6482ca1a51e1b250dfd1ed0eef9", ""},
-		TestHash{"606beeec743ccbeff6cbcdf5d5302aa855c256c29b88c8ed331ea1a6bf3c8812", "The quick brown fox jumps over the lazy dog"},
-	}
-	for v, _ in test_vectors {
-		computed     := blake2s.hash(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
-test_sm3 :: proc(t: ^testing.T) {
-	test_vectors := [?]TestHash {
-		TestHash{"1ab21d8355cfa17f8e61194831e81a8f22bec8c728fefb747ed035eb5082aa2b", ""},
-		TestHash{"66c7f0f462eeedd9d1f2d46bdc10e4e24167c4875cf2f7a2297da02b8f4ba8e0", "abc"},
-		TestHash{"debe9ff92275b8a138604889c18e5a4d6fdb70e5387e5765293dcba39c0c5732", "abcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcd"},
-		TestHash{"5fdfe814b8573ca021983970fc79b2218c9570369b4859684e2e4c3fc76cb8ea", "The quick brown fox jumps over the lazy dog"},
-		TestHash{"ca27d14a42fc04c1e5ecf574a95a8c2d70ecb5805e9b429026ccac8f28b20098", "The quick brown fox jumps over the lazy cog"},
-	}
-	for v, _ in test_vectors {
-		computed     := sm3.hash(v.str)
-		computed_str := hex_string(computed[:])
-		expect(t, computed_str == v.hash, fmt.tprintf("Expected: %s for input of %s, but got %s instead", v.hash, v.str, computed_str))
-	}
-}
-
-@(test)
 test_siphash_2_4 :: proc(t: ^testing.T) {
 	// Test vectors from
 	// https://github.com/veorq/SipHash/blob/master/vectors.h
diff --git a/tests/core/crypto/test_core_crypto_hash.odin b/tests/core/crypto/test_core_crypto_hash.odin
new file mode 100644
index 000000000..bcbcdbe88
--- /dev/null
+++ b/tests/core/crypto/test_core_crypto_hash.odin
@@ -0,0 +1,613 @@
+package test_core_crypto
+
+import "core:bytes"
+import "core:fmt"
+import "core:strings"
+import "core:testing"
+
+import "core:crypto/hash"
+
+TestHash :: struct {
+	algo: hash.Algorithm,
+	hash: string,
+	str:  string,
+}
+
+@(test)
+test_hash :: proc(t: ^testing.T) {
+	log(t, "Testing Hashes")
+
+	// TODO:
+	// - Stick the test vectors in a JSON file or something.
+	data_1_000_000_a := strings.repeat("a", 1_000_000)
+
+	digest: [64]byte // 512-bits is enough for every digest for now.
+	test_vectors := [?]TestHash {
+		// BLAKE2b
+		TestHash {
+			hash.Algorithm.BLAKE2B,
+			"786a02f742015903c6c6fd852552d272912f4740e15847618a86e217f71f5419d25e1031afee585313896444934eb04b903a685b1448b755d56f701afe9be2ce",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.BLAKE2B,
+			"a8add4bdddfd93e4877d2746e62817b116364a1fa7bc148d95090bc7333b3673f82401cf7aa2e4cb1ecd90296e3f14cb5413f8ed77be73045b13914cdcd6a918",
+			"The quick brown fox jumps over the lazy dog",
+		},
+
+		// BLAKE2s
+		TestHash {
+			hash.Algorithm.BLAKE2S,
+			"69217a3079908094e11121d042354a7c1f55b6482ca1a51e1b250dfd1ed0eef9",
+			"",
+		},
+		TestHash{
+			hash.Algorithm.BLAKE2S,
+			"606beeec743ccbeff6cbcdf5d5302aa855c256c29b88c8ed331ea1a6bf3c8812",
+			"The quick brown fox jumps over the lazy dog",
+		},
+
+		// SHA-224
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		// - https://datatracker.ietf.org/doc/html/rfc3874#section-3.3
+		TestHash {
+			hash.Algorithm.SHA224,
+			"d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.SHA224,
+			"23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7",
+			"abc",
+		},
+		TestHash {
+			hash.Algorithm.SHA224,
+			"75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525",
+			"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA224,
+			"c97ca9a559850ce97a04a96def6d99a9e0e0e2ab14e6b8df265fc0b3",
+			"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+		},
+		TestHash {
+			hash.Algorithm.SHA224,
+			"20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67",
+			data_1_000_000_a,
+		},
+
+		// SHA-256
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.SHA256,
+			"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.SHA256,
+			"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
+			"abc",
+		},
+		TestHash {
+			hash.Algorithm.SHA256,
+			"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1",
+			"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA256,
+			"cf5b16a778af8380036ce59e7b0492370b249b11e8f07a51afac45037afee9d1",
+			"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+		},
+
+		// SHA-384
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.SHA384,
+			"38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da274edebfe76f65fbd51ad2f14898b95b",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.SHA384,
+			"cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed8086072ba1e7cc2358baeca134c825a7",
+			"abc",
+		},
+		TestHash {
+			hash.Algorithm.SHA384,
+			"3391fdddfc8dc7393707a65b1b4709397cf8b1d162af05abfe8f450de5f36bc6b0455a8520bc4e6f5fe95b1fe3c8452b",
+			"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA384,
+			"09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712fcc7c71a557e2db966c3e9fa91746039",
+			"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+		},
+
+		// SHA-512
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.SHA512,
+			"cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.SHA512,
+			"ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f",
+			"abc",
+		},
+		TestHash {
+			hash.Algorithm.SHA512,
+			"204a8fc6dda82f0a0ced7beb8e08a41657c16ef468b228a8279be331a703c33596fd15c13b1b07f9aa1d3bea57789ca031ad85c7a71dd70354ec631238ca3445",
+			"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA512,
+			"8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909",
+			"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+		},
+		// SHA-512/256
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		TestHash {
+			hash.Algorithm.SHA512_256,
+			"53048e2681941ef99b2e29b76b4c7dabe4c2d0c634fc6d46e0e2f13107e7af23",
+			"abc",
+		},
+		TestHash {
+			hash.Algorithm.SHA512_256,
+			"3928e184fb8690f840da3988121d31be65cb9d3ef83ee6146feac861e19b563a",
+			"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+		},
+
+		// SHA3-224
+		//
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.SHA3_224,
+			"6b4e03423667dbb73b6e15454f0eb1abd4597f9a1b078e3f5b5a6bc7",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_224,
+			"e642824c3f8cf24ad09234ee7d3c766fc9a3a5168d0c94ad73b46fdf",
+			"abc",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_224,
+			"10241ac5187380bd501192e4e56b5280908727dd8fe0d10d4e5ad91e",
+			"abcdbcdecdefdefgefghfghighijhi",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_224,
+			"fd645fe07d814c397e85e85f92fe58b949f55efa4d3468b2468da45a",
+			"jkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_224,
+			"9e86ff69557ca95f405f081269685b38e3a819b309ee942f482b6a8b",
+			"a",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_224,
+			"6961f694b2ff3ed6f0c830d2c66da0c5e7ca9445f7c0dca679171112",
+			"01234567012345670123456701234567",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_224,
+			"8a24108b154ada21c9fd5574494479ba5c7e7ab76ef264ead0fcce33",
+			"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_224,
+			"543e6868e1666c1a643630df77367ae5a62a85070a51c14cbf665cbc",
+			"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+		},
+
+		// SHA3-256
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.SHA3_256,
+			"a7ffc6f8bf1ed76651c14756a061d662f580ff4de43b49fa82d80a4b80f8434a",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_256,
+			"3a985da74fe225b2045c172d6bd390bd855f086e3e9d525b46bfe24511431532",
+			"abc",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_256,
+			"565ada1ced21278cfaffdde00dea0107964121ac25e4e978abc59412be74550a",
+			"abcdbcdecdefdefgefghfghighijhi",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_256,
+			"8cc1709d520f495ce972ece48b0d2e1f74ec80d53bc5c47457142158fae15d98",
+			"jkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_256,
+			"80084bf2fba02475726feb2cab2d8215eab14bc6bdd8bfb2c8151257032ecd8b",
+			"a",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_256,
+			"e4786de5f88f7d374b7288f225ea9f2f7654da200bab5d417e1fb52d49202767",
+			"01234567012345670123456701234567",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_256,
+			"41c0dba2a9d6240849100376a8235e2c82e1b9998a999e21db32dd97496d3376",
+			"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_256,
+			"916f6061fe879741ca6469b43971dfdb28b1a32dc36cb3254e812be27aad1d18",
+			"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+		},
+
+		// SHA3-384
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.SHA3_384,
+			"0c63a75b845e4f7d01107d852e4c2485c51a50aaaa94fc61995e71bbee983a2ac3713831264adb47fb6bd1e058d5f004",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_384,
+			"ec01498288516fc926459f58e2c6ad8df9b473cb0fc08c2596da7cf0e49be4b298d88cea927ac7f539f1edf228376d25",
+			"abc",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_384,
+			"9aa92dbb716ebb573def0d5e3cdd28d6add38ada310b602b8916e690a3257b7144e5ddd3d0dbbc559c48480d34d57a9a",
+			"abcdbcdecdefdefgefghfghighijhi",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_384,
+			"77c90323d7392bcdee8a3e7f74f19f47b7d1b1a825ac6a2d8d882a72317879cc26597035f1fc24fe65090b125a691282",
+			"jkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_384,
+			"1815f774f320491b48569efec794d249eeb59aae46d22bf77dafe25c5edc28d7ea44f93ee1234aa88f61c91912a4ccd9",
+			"a",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_384,
+			"51072590ad4c51b27ff8265590d74f92de7cc55284168e414ca960087c693285b08a283c6b19d77632994cb9eb93f1be",
+			"01234567012345670123456701234567",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_384,
+			"991c665755eb3a4b6bbdfb75c78a492e8c56a22c5c4d7e429bfdbc32b9d4ad5aa04a1f076e62fea19eef51acd0657c22",
+			"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_384,
+			"79407d3b5916b59c3e30b09822974791c313fb9ecc849e406f23592d04f625dc8c709b98b43b3852b337216179aa7fc7",
+			"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+		},
+
+		// SHA3-512
+		// https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.SHA3_512,
+			"a69f73cca23a9ac5c8b567dc185a756e97c982164fe25859e0d1dcc1475c80a615b2123af1f5f94c11e3e9402c3ac558f500199d95b6d3e301758586281dcd26",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_512,
+			"b751850b1a57168a5693cd924b6b096e08f621827444f70d884f5d0240d2712e10e116e9192af3c91a7ec57647e3934057340b4cf408d5a56592f8274eec53f0",
+			"abc",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_512,
+			"9f9a327944a35988d67effc4fa748b3c07744f736ac70b479d8e12a3d10d6884d00a7ef593690305462e9e9030a67c51636fd346fd8fa0ee28a5ac2aee103d2e",
+			"abcdbcdecdefdefgefghfghighijhi",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_512,
+			"dbb124a0deda966eb4d199d0844fa0beb0770ea1ccddabcd335a7939a931ac6fb4fa6aebc6573f462ced2e4e7178277803be0d24d8bc2864626d9603109b7891",
+			"jkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_512,
+			"697f2d856172cb8309d6b8b97dac4de344b549d4dee61edfb4962d8698b7fa803f4f93ff24393586e28b5b957ac3d1d369420ce53332712f997bd336d09ab02a",
+			"a",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_512,
+			"5679e353bc8eeea3e801ca60448b249bcfd3ac4a6c3abe429a807bcbd4c9cd12da87a5a9dc74fde64c0d44718632cae966b078397c6f9ec155c6a238f2347cf1",
+			"01234567012345670123456701234567",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_512,
+			"04a371e84ecfb5b8b77cb48610fca8182dd457ce6f326a0fd3d7ec2f1e91636dee691fbe0c985302ba1b0d8dc78c086346b533b49c030d99a27daf1139d6e75e",
+			"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.SHA3_512,
+			"afebb2ef542e6579c50cad06d2e578f9f8dd6881d7dc824d26360feebf18a4fa73e3261122948efcfd492e74e82e2189ed0fb440d187f382270cb455f21dd185",
+			"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+		},
+
+		// SHAKE-128
+		TestHash{hash.Algorithm.SHAKE_128, "7f9c2ba4e88f827d616045507605853e", ""},
+		TestHash {
+			hash.Algorithm.SHAKE_128,
+			"f4202e3c5852f9182a0430fd8144f0a7",
+			"The quick brown fox jumps over the lazy dog",
+		},
+		TestHash {
+			hash.Algorithm.SHAKE_128,
+			"853f4538be0db9621a6cea659a06c110",
+			"The quick brown fox jumps over the lazy dof",
+		},
+
+		// SHAKE-256
+		TestHash {
+			hash.Algorithm.SHAKE_256,
+			"46b9dd2b0ba88d13233b3feb743eeb243fcd52ea62b81b82b50c27646ed5762f",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.SHAKE_256,
+			"2f671343d9b2e1604dc9dcf0753e5fe15c7c64a0d283cbbf722d411a0e36f6ca",
+			"The quick brown fox jumps over the lazy dog",
+		},
+		TestHash {
+			hash.Algorithm.SHAKE_256,
+			"46b1ebb2e142c38b9ac9081bef72877fe4723959640fa57119b366ce6899d401",
+			"The quick brown fox jumps over the lazy dof",
+		},
+
+		// SM3
+		TestHash {
+			hash.Algorithm.SM3,
+			"1ab21d8355cfa17f8e61194831e81a8f22bec8c728fefb747ed035eb5082aa2b",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.SM3,
+			"66c7f0f462eeedd9d1f2d46bdc10e4e24167c4875cf2f7a2297da02b8f4ba8e0",
+			"abc",
+		},
+		TestHash {
+			hash.Algorithm.SM3,
+			"debe9ff92275b8a138604889c18e5a4d6fdb70e5387e5765293dcba39c0c5732",
+			"abcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcd",
+		},
+		TestHash {
+			hash.Algorithm.SM3,
+			"5fdfe814b8573ca021983970fc79b2218c9570369b4859684e2e4c3fc76cb8ea",
+			"The quick brown fox jumps over the lazy dog",
+		},
+		TestHash {
+			hash.Algorithm.SM3,
+			"ca27d14a42fc04c1e5ecf574a95a8c2d70ecb5805e9b429026ccac8f28b20098",
+			"The quick brown fox jumps over the lazy cog",
+		},
+
+		// Keccak-224 (Legacy)
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.Legacy_KECCAK_224,
+			"f71837502ba8e10837bdd8d365adb85591895602fc552b48b7390abd",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.Legacy_KECCAK_224,
+			"c30411768506ebe1c2871b1ee2e87d38df342317300a9b97a95ec6a8",
+			"abc",
+		},
+
+		// Keccak-256 (Legacy)
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.Legacy_KECCAK_256,
+			"c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.Legacy_KECCAK_256,
+			"4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45",
+			"abc",
+		},
+
+		// Keccak-384 (Legacy)
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.Legacy_KECCAK_384,
+			"2c23146a63a29acf99e73b88f8c24eaa7dc60aa771780ccc006afbfa8fe2479b2dd2b21362337441ac12b515911957ff",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.Legacy_KECCAK_384,
+			"f7df1165f033337be098e7d288ad6a2f74409d7a60b49c36642218de161b1f99f8c681e4afaf31a34db29fb763e3c28e",
+			"abc",
+		},
+
+		// Keccak-512 (Legacy)
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash {
+			hash.Algorithm.Legacy_KECCAK_512,
+			"0eab42de4c3ceb9235fc91acffe746b29c29a8c366b7c60e4e67c466f36a4304c00fa9caf9d87976ba469bcbe06713b435f091ef2769fb160cdab33d3670680e",
+			"",
+		},
+		TestHash {
+			hash.Algorithm.Legacy_KECCAK_512,
+			"18587dc2ea106b9a1563e32b3312421ca164c7f1f07bc922a9c83d77cea3a1e5d0c69910739025372dc14ac9642629379540c17e2a65b19d77aa511a9d00bb96",
+			"abc",
+		},
+
+		// MD5 (Insecure)
+		// - https://datatracker.ietf.org/doc/html/rfc1321
+		TestHash{hash.Algorithm.Insecure_MD5, "d41d8cd98f00b204e9800998ecf8427e", ""},
+		TestHash{hash.Algorithm.Insecure_MD5, "0cc175b9c0f1b6a831c399e269772661", "a"},
+		TestHash{hash.Algorithm.Insecure_MD5, "900150983cd24fb0d6963f7d28e17f72", "abc"},
+		TestHash {
+			hash.Algorithm.Insecure_MD5,
+			"f96b697d7cb7938d525a2f31aaf161d0",
+			"message digest",
+		},
+		TestHash {
+			hash.Algorithm.Insecure_MD5,
+			"c3fcd3d76192e4007dfb496cca67e13b",
+			"abcdefghijklmnopqrstuvwxyz",
+		},
+		TestHash {
+			hash.Algorithm.Insecure_MD5,
+			"d174ab98d277d9f5a5611c2c9f419d9f",
+			"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
+		},
+		TestHash {
+			hash.Algorithm.Insecure_MD5,
+			"57edf4a22be3c955ac49da2e2107b67a",
+			"12345678901234567890123456789012345678901234567890123456789012345678901234567890",
+		},
+
+		// SHA-1 (Insecure)
+		// - https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and-guidelines/documents/examples/sha_all.pdf
+		// - https://www.di-mgt.com.au/sha_testvectors.html
+		TestHash{hash.Algorithm.Insecure_SHA1, "da39a3ee5e6b4b0d3255bfef95601890afd80709", ""},
+		TestHash{hash.Algorithm.Insecure_SHA1, "a9993e364706816aba3e25717850c26c9cd0d89d", "abc"},
+		TestHash {
+			hash.Algorithm.Insecure_SHA1,
+			"f9537c23893d2014f365adf8ffe33b8eb0297ed1",
+			"abcdbcdecdefdefgefghfghighijhi",
+		},
+		TestHash {
+			hash.Algorithm.Insecure_SHA1,
+			"346fb528a24b48f563cb061470bcfd23740427ad",
+			"jkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash{hash.Algorithm.Insecure_SHA1, "86f7e437faa5a7fce15d1ddcb9eaeaea377667b8", "a"},
+		TestHash {
+			hash.Algorithm.Insecure_SHA1,
+			"c729c8996ee0a6f74f4f3248e8957edf704fb624",
+			"01234567012345670123456701234567",
+		},
+		TestHash {
+			hash.Algorithm.Insecure_SHA1,
+			"84983e441c3bd26ebaae4aa1f95129e5e54670f1",
+			"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+		},
+		TestHash {
+			hash.Algorithm.Insecure_SHA1,
+			"a49b2446a02c645bf419f995b67091253a04a259",
+			"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+		},
+	}
+	for v, _ in test_vectors {
+		algo_name := hash.ALGORITHM_NAMES[v.algo]
+		dst := digest[:hash.DIGEST_SIZES[v.algo]]
+
+		data := transmute([]byte)(v.str)
+
+		ctx: hash.Context
+		hash.init(&ctx, v.algo)
+		hash.update(&ctx, data)
+		hash.final(&ctx, dst)
+
+		dst_str := hex_string(dst)
+
+		expect(
+			t,
+			dst_str == v.hash,
+			fmt.tprintf(
+				"%s/incremental: Expected: %s for input of %s, but got %s instead",
+				algo_name,
+				v.hash,
+				v.str,
+				dst_str,
+			),
+		)
+
+	}
+
+	for algo in hash.Algorithm {
+		// Skip the sentinel value.
+		if algo == .Invalid {
+			continue
+		}
+
+		algo_name := hash.ALGORITHM_NAMES[algo]
+
+		// Exercise most of the happy-path for the high level interface.
+		rd: bytes.Reader
+		bytes.reader_init(&rd, transmute([]byte)(data_1_000_000_a))
+		st := bytes.reader_to_stream(&rd)
+
+		digest_a, _ := hash.hash_stream(algo, st, context.temp_allocator)
+		digest_b := hash.hash_string(algo, data_1_000_000_a, context.temp_allocator)
+
+		a_str, b_str := hex_string(digest_a), hex_string(digest_b)
+
+		expect(
+			t,
+			a_str == b_str,
+			fmt.tprintf(
+				"%s/cmp: Expected: %s (hash_stream) == %s (hash_bytes)",
+				algo_name,
+				a_str,
+				b_str,
+			),
+		)
+
+		// Exercise the rolling digest functionality, which also covers
+		// each implementation's clone routine.
+		ctx: hash.Context
+		hash.init(&ctx, algo, context.temp_allocator)
+
+		api_algo := hash.algorithm(&ctx)
+		api_digest_size := hash.digest_size(&ctx)
+		expect(
+			t,
+			algo == api_algo,
+			fmt.tprintf(
+				"%s/algorithm: Expected: %v but got %v instead",
+				algo_name,
+				algo,
+				api_algo,
+			),
+		)
+		expect(
+			t,
+			hash.DIGEST_SIZES[algo] == api_digest_size,
+			fmt.tprintf(
+				"%s/digest_size: Expected: %d but got %d instead",
+				algo_name,
+				hash.DIGEST_SIZES[algo],
+				api_digest_size,
+			),
+		)
+
+		hash.update(&ctx, digest_a)
+		hash.final(&ctx, digest_a, true)
+		hash.final(&ctx, digest_b)
+
+		a_str, b_str = hex_string(digest_a), hex_string(digest_b)
+
+		expect(
+			t,
+			a_str == b_str,
+			fmt.tprintf(
+				"%s/rolling: Expected: %s (first) == %s (second)",
+				algo_name,
+				a_str,
+				b_str,
+			),
+		)
+	}
+}