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package crypto_hash
import "core:crypto/blake2b"
import "core:crypto/blake2s"
import "core:crypto/sha2"
import "core:crypto/sha3"
import "core:crypto/sm3"
import "core:crypto/legacy/keccak"
import "core:crypto/legacy/md5"
import "core:crypto/legacy/sha1"
import "core:reflect"
// MAX_DIGEST_SIZE is the maximum size digest that can be returned by any
// of the Algorithms supported via this package.
MAX_DIGEST_SIZE :: 64
// MAX_BLOCK_SIZE is the maximum block size used by any of Algorithms
// supported by this package.
MAX_BLOCK_SIZE :: sha3.BLOCK_SIZE_224
// 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,
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",
.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 in bytes.
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,
.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,
}
// BLOCK_SIZES is the Algoritm to block size in bytes.
BLOCK_SIZES := [Algorithm]int {
.Invalid = 0,
.BLAKE2B = blake2b.BLOCK_SIZE,
.BLAKE2S = blake2s.BLOCK_SIZE,
.SHA224 = sha2.BLOCK_SIZE_256,
.SHA256 = sha2.BLOCK_SIZE_256,
.SHA384 = sha2.BLOCK_SIZE_512,
.SHA512 = sha2.BLOCK_SIZE_512,
.SHA512_256 = sha2.BLOCK_SIZE_512,
.SHA3_224 = sha3.BLOCK_SIZE_224,
.SHA3_256 = sha3.BLOCK_SIZE_256,
.SHA3_384 = sha3.BLOCK_SIZE_384,
.SHA3_512 = sha3.BLOCK_SIZE_512,
.SM3 = sm3.BLOCK_SIZE,
.Legacy_KECCAK_224 = keccak.BLOCK_SIZE_224,
.Legacy_KECCAK_256 = keccak.BLOCK_SIZE_256,
.Legacy_KECCAK_384 = keccak.BLOCK_SIZE_384,
.Legacy_KECCAK_512 = keccak.BLOCK_SIZE_512,
.Insecure_MD5 = md5.BLOCK_SIZE,
.Insecure_SHA1 = sha1.BLOCK_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,
sm3.Context,
keccak.Context,
md5.Context,
sha1.Context,
},
}
@(private)
_IMPL_IDS := [Algorithm]typeid {
.Invalid = nil,
.BLAKE2B = typeid_of(blake2b.Context),
.BLAKE2S = typeid_of(blake2s.Context),
.SHA224 = typeid_of(sha2.Context_256),
.SHA256 = typeid_of(sha2.Context_256),
.SHA384 = typeid_of(sha2.Context_512),
.SHA512 = typeid_of(sha2.Context_512),
.SHA512_256 = typeid_of(sha2.Context_512),
.SHA3_224 = typeid_of(sha3.Context),
.SHA3_256 = typeid_of(sha3.Context),
.SHA3_384 = typeid_of(sha3.Context),
.SHA3_512 = typeid_of(sha3.Context),
.SM3 = typeid_of(sm3.Context),
.Legacy_KECCAK_224 = typeid_of(keccak.Context),
.Legacy_KECCAK_256 = typeid_of(keccak.Context),
.Legacy_KECCAK_384 = typeid_of(keccak.Context),
.Legacy_KECCAK_512 = typeid_of(keccak.Context),
.Insecure_MD5 = typeid_of(md5.Context),
.Insecure_SHA1 = typeid_of(sha1.Context),
}
// init initializes a Context with a specific hash Algorithm.
init :: proc(ctx: ^Context, algorithm: Algorithm) {
if ctx._impl != nil {
reset(ctx)
}
// Directly specialize the union by setting the type ID (save a copy).
reflect.set_union_variant_typeid(
ctx._impl,
_IMPL_IDS[algorithm],
)
switch algorithm {
case .BLAKE2B:
blake2b.init(&ctx._impl.(blake2b.Context))
case .BLAKE2S:
blake2s.init(&ctx._impl.(blake2s.Context))
case .SHA224:
sha2.init_224(&ctx._impl.(sha2.Context_256))
case .SHA256:
sha2.init_256(&ctx._impl.(sha2.Context_256))
case .SHA384:
sha2.init_384(&ctx._impl.(sha2.Context_512))
case .SHA512:
sha2.init_512(&ctx._impl.(sha2.Context_512))
case .SHA512_256:
sha2.init_512_256(&ctx._impl.(sha2.Context_512))
case .SHA3_224:
sha3.init_224(&ctx._impl.(sha3.Context))
case .SHA3_256:
sha3.init_256(&ctx._impl.(sha3.Context))
case .SHA3_384:
sha3.init_384(&ctx._impl.(sha3.Context))
case .SHA3_512:
sha3.init_512(&ctx._impl.(sha3.Context))
case .SM3:
sm3.init(&ctx._impl.(sm3.Context))
case .Legacy_KECCAK_224:
keccak.init_224(&ctx._impl.(keccak.Context))
case .Legacy_KECCAK_256:
keccak.init_256(&ctx._impl.(keccak.Context))
case .Legacy_KECCAK_384:
keccak.init_384(&ctx._impl.(keccak.Context))
case .Legacy_KECCAK_512:
keccak.init_512(&ctx._impl.(keccak.Context))
case .Insecure_MD5:
md5.init(&ctx._impl.(md5.Context))
case .Insecure_SHA1:
sha1.init(&ctx._impl.(sha1.Context))
case .Invalid:
panic("crypto/hash: uninitialized algorithm")
case:
panic("crypto/hash: invalid algorithm")
}
ctx._algo = algorithm
}
// 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 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 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) {
// 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
reflect.set_union_variant_typeid(
ctx._impl,
reflect.union_variant_typeid(other._impl),
)
switch &src_impl in other._impl {
case blake2b.Context:
blake2b.clone(&ctx._impl.(blake2b.Context), &src_impl)
case blake2s.Context:
blake2s.clone(&ctx._impl.(blake2s.Context), &src_impl)
case sha2.Context_256:
sha2.clone(&ctx._impl.(sha2.Context_256), &src_impl)
case sha2.Context_512:
sha2.clone(&ctx._impl.(sha2.Context_512), &src_impl)
case sha3.Context:
sha3.clone(&ctx._impl.(sha3.Context), &src_impl)
case sm3.Context:
sm3.clone(&ctx._impl.(sm3.Context), &src_impl)
case keccak.Context:
keccak.clone(&ctx._impl.(keccak.Context), &src_impl)
case md5.Context:
md5.clone(&ctx._impl.(md5.Context), &src_impl)
case sha1.Context:
sha1.clone(&ctx._impl.(sha1.Context), &src_impl)
case:
panic("crypto/hash: uninitialized algorithm")
}
}
// reset sanitizes 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)
case blake2s.Context:
blake2s.reset(&impl)
case sha2.Context_256:
sha2.reset(&impl)
case sha2.Context_512:
sha2.reset(&impl)
case sha3.Context:
sha3.reset(&impl)
case sm3.Context:
sm3.reset(&impl)
case keccak.Context:
keccak.reset(&impl)
case md5.Context:
md5.reset(&impl)
case sha1.Context:
sha1.reset(&impl)
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 in bytes.
digest_size :: proc(ctx: ^Context) -> int {
return DIGEST_SIZES[ctx._algo]
}
// block_size returns the block size of a Context instance in bytes.
block_size :: proc(ctx: ^Context) -> int {
return BLOCK_SIZES[ctx._algo]
}
|
