core/crypto: Exile keccak, md5 and sha1 to legacy

In an perfect world these would just be removed, but the world is
imperfect, and people are forced to interact/interface with things
that are broken.

1 files changed, 377 insertions, 0 deletions

diff --git a/core/crypto/legacy/keccak/keccak.odin b/core/crypto/legacy/keccak/keccak.odin
new file mode 100644
index 000000000..09db853a6
--- /dev/null
+++ b/core/crypto/legacy/keccak/keccak.odin
@@ -0,0 +1,377 @@
+package keccak
+
+/*
+    Copyright 2021 zhibog
+    Made available under the BSD-3 license.
+
+    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.
+*/
+
+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
+	ctx.is_keccak = true
+	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
+	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
+	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,
+}
+
+// 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
+	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
+}
+
+// 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
+	ctx.mdlen = DIGEST_SIZE_512
+	ctx.is_keccak = true
+	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
+	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
+}
+
+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,
+}
+
+/*
+    Low level API
+*/
+
+Context :: _sha3.Sha3_Context
+
+init :: proc(ctx: ^Context) {
+	ctx.is_keccak = true
+	_sha3.init(ctx)
+}
+
+update :: proc(ctx: ^Context, data: []byte) {
+	_sha3.update(ctx, data)
+}
+
+final :: proc(ctx: ^Context, hash: []byte) {
+	_sha3.final(ctx, hash)
+}