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core/crypto/blake2: API cleanup and bug fixes

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- blake2s.Blake2s_Context -> blake2s.Context
- blake2b.Blake2b_Context -> blake2b.Context
- Fix the BLAKE2s low level API (context type was incorrect)
- Support the configurable output size
This commit is contained in:
Yawning Angel
2023-11-17 19:31:51 +09:00
parent b71afdc3ee
commit aa821991b8
4 changed files with 70 additions and 63 deletions
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core/crypto/_blake2/blake2.odin
+16 -8
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@@ -86,8 +86,14 @@ BLAKE2B_IV := [8]u64 {
init :: proc(ctx: ^$T) {
when T == Blake2s_Context {
block_size :: BLAKE2S_BLOCK_SIZE
max_size :: BLAKE2S_SIZE
} else when T == Blake2b_Context {
block_size :: BLAKE2B_BLOCK_SIZE
max_size :: BLAKE2B_SIZE
}
if ctx.cfg.size > max_size {
panic("blake2: requested output size exceeeds algorithm max")
}
p := make([]byte, block_size)
@@ -192,13 +198,12 @@ final :: proc(ctx: ^$T, hash: []byte) {
assert(ctx.is_initialized)
when T == Blake2s_Context {
if len(hash) < BLAKE2S_SIZE {
if len(hash) < int(ctx.cfg.size) {
panic("crypto/blake2s: invalid destination digest size")
}
blake2s_final(ctx, hash)
}
when T == Blake2b_Context {
if len(hash) < BLAKE2B_SIZE {
} else when T == Blake2b_Context {
if len(hash) < int(ctx.cfg.size) {
panic("crypto/blake2b: invalid destination digest size")
}
blake2b_final(ctx, hash)
@@ -228,9 +233,11 @@ blake2s_final :: proc "contextless" (ctx: ^Blake2s_Context, hash: []byte) {
blocks(ctx, ctx.x[:])
dst: [BLAKE2S_SIZE]byte
for i := 0; i < BLAKE2S_SIZE / 4; i += 1 {
endian.unchecked_put_u32le(hash[i * 4:], ctx.h[i])
endian.unchecked_put_u32le(dst[i * 4:], ctx.h[i])
}
copy(hash, dst[:])
}
@(private)
@@ -254,17 +261,18 @@ blake2b_final :: proc "contextless" (ctx: ^Blake2b_Context, hash: []byte) {
blocks(ctx, ctx.x[:])
dst: [BLAKE2B_SIZE]byte
for i := 0; i < BLAKE2B_SIZE / 8; i += 1 {
endian.unchecked_put_u64le(hash[i * 8:], ctx.h[i])
endian.unchecked_put_u64le(dst[i * 8:], ctx.h[i])
}
copy(hash, dst[:])
}
@(private)
blocks :: proc "contextless" (ctx: ^$T, p: []byte) {
when T == Blake2s_Context {
blake2s_blocks(ctx, p)
}
when T == Blake2b_Context {
} else when T == Blake2b_Context {
blake2b_blocks(ctx, p)
}
}