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core/crypto: Add private attributes for internals

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These constants and internal routines are not intended for use outside
the actual implementations themselves.
This commit is contained in:
Yawning Angel
2023-04-08 10:15:00 +09:00
parent b8c2b0105b
commit 7fc2081543
5 changed files with 27 additions and 1 deletions
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core/crypto/chacha20/chacha20.odin
+10
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@@ -8,15 +8,23 @@ KEY_SIZE :: 32
NONCE_SIZE :: 12
XNONCE_SIZE :: 24
@(private)
_MAX_CTR_IETF :: 0xffffffff
@(private)
_BLOCK_SIZE :: 64
@(private)
_STATE_SIZE_U32 :: 16
@(private)
_ROUNDS :: 20
@(private)
_SIGMA_0 : u32 : 0x61707865
@(private)
_SIGMA_1 : u32 : 0x3320646e
@(private)
_SIGMA_2 : u32 : 0x79622d32
@(private)
_SIGMA_3 : u32 : 0x6b206574
Context :: struct {
@@ -179,6 +187,7 @@ reset :: proc (ctx: ^Context) {
ctx._is_initialized = false
}
@(private)
_do_blocks :: proc (ctx: ^Context, dst, src: []byte, nr_blocks: int) {
// Enforce the maximum consumed keystream per nonce.
//
@@ -441,6 +450,7 @@ _do_blocks :: proc (ctx: ^Context, dst, src: []byte, nr_blocks: int) {
}
}
@(private)
_hchacha20 :: proc (dst, key, nonce: []byte) {
x0, x1, x2, x3 := _SIGMA_0, _SIGMA_1, _SIGMA_2, _SIGMA_3
x4 := util.U32_LE(key[0:4])