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core/crypto: Expose the block sizes for every hash algorithm

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While I just went and made this private, this information is required
for keying HMAC.
This commit is contained in:
Yawning Angel
2024-02-07 00:37:18 +09:00
parent bc160d2eb7
commit 7a8b1669b0
11 changed files with 100 additions and 42 deletions
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core/crypto/sha2/sha2.odin
+20 -20
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@@ -19,20 +19,26 @@ import "core:encoding/endian"
import "core:math/bits"
import "core:mem"
// DIGEST_SIZE_224 is the SHA-224 digest size.
// DIGEST_SIZE_224 is the SHA-224 digest size in bytes.
DIGEST_SIZE_224 :: 28
// DIGEST_SIZE_256 is the SHA-256 digest size.
// DIGEST_SIZE_256 is the SHA-256 digest size in bytes.
DIGEST_SIZE_256 :: 32
// DIGEST_SIZE_384 is the SHA-384 digest size.
// DIGEST_SIZE_384 is the SHA-384 digest size in bytes.
DIGEST_SIZE_384 :: 48
// DIGEST_SIZE_512 is the SHA-512 digest size.
// DIGEST_SIZE_512 is the SHA-512 digest size in bytes.
DIGEST_SIZE_512 :: 64
// DIGEST_SIZE_512_256 is the SHA-512/256 digest size.
// DIGEST_SIZE_512_256 is the SHA-512/256 digest size in bytes.
DIGEST_SIZE_512_256 :: 32
// BLOCK_SIZE_256 is the SHA-224 and SHA-256 block size in bytes.
BLOCK_SIZE_256 :: 64
// BLOCK_SIZE_512 is the SHA-384, SHA-512, and SHA-512/256 block size
// in bytes.
BLOCK_SIZE_512 :: 128
// Context_256 is a SHA-224 or SHA-256 instance.
Context_256 :: struct {
block: [SHA256_BLOCK_SIZE]byte,
block: [BLOCK_SIZE_256]byte,
h: [8]u32,
bitlength: u64,
length: u64,
@@ -43,7 +49,7 @@ Context_256 :: struct {
// Context_512 is a SHA-384, SHA-512 or SHA-512/256 instance.
Context_512 :: struct {
block: [SHA512_BLOCK_SIZE]byte,
block: [BLOCK_SIZE_512]byte,
h: [8]u64,
bitlength: u64,
length: u64,
@@ -52,7 +58,6 @@ Context_512 :: struct {
is_initialized: bool,
}
// init_224 initializes a Context_256 for SHA-224.
init_224 :: proc(ctx: ^Context_256) {
ctx.md_bits = 224
@@ -156,9 +161,9 @@ update :: proc(ctx: ^$T, data: []byte) {
assert(ctx.is_initialized)
when T == Context_256 {
CURR_BLOCK_SIZE :: SHA256_BLOCK_SIZE
CURR_BLOCK_SIZE :: BLOCK_SIZE_256
} else when T == Context_512 {
CURR_BLOCK_SIZE :: SHA512_BLOCK_SIZE
CURR_BLOCK_SIZE :: BLOCK_SIZE_512
}
data := data
@@ -205,12 +210,12 @@ final :: proc(ctx: ^$T, hash: []byte, finalize_clone: bool = false) {
length := ctx.length
raw_pad: [SHA512_BLOCK_SIZE]byte
raw_pad: [BLOCK_SIZE_512]byte
when T == Context_256 {
CURR_BLOCK_SIZE :: SHA256_BLOCK_SIZE
CURR_BLOCK_SIZE :: BLOCK_SIZE_256
pm_len := 8 // 64-bits for length
} else when T == Context_512 {
CURR_BLOCK_SIZE :: SHA512_BLOCK_SIZE
CURR_BLOCK_SIZE :: BLOCK_SIZE_512
pm_len := 16 // 128-bits for length
}
pad := raw_pad[:CURR_BLOCK_SIZE]
@@ -265,11 +270,6 @@ reset :: proc(ctx: ^$T) {
SHA2 implementation
*/
@(private)
SHA256_BLOCK_SIZE :: 64
@(private)
SHA512_BLOCK_SIZE :: 128
@(private)
sha256_k := [64]u32 {
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
@@ -400,12 +400,12 @@ sha2_transf :: proc "contextless" (ctx: ^$T, data: []byte) {
w: [64]u32
wv: [8]u32
t1, t2: u32
CURR_BLOCK_SIZE :: SHA256_BLOCK_SIZE
CURR_BLOCK_SIZE :: BLOCK_SIZE_256
} else when T == Context_512 {
w: [80]u64
wv: [8]u64
t1, t2: u64
CURR_BLOCK_SIZE :: SHA512_BLOCK_SIZE
CURR_BLOCK_SIZE :: BLOCK_SIZE_512
}
data := data