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Merge pull request #8801 from gilles-peskine-arm/sha3-no-table

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Inline the SHA3 parameters table into a switch
This commit is contained in:
Tom Cosgrove 2024-02-13 14:06:44 +00:00 committed by GitHub
commit 8fe2e36de5
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GPG key ID: B5690EEEBB952194
1 changed files with 18 additions and 31 deletions
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49
library/sha3.c
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@ -26,25 +26,6 @@
#define XOR_BYTE 0x6
typedef struct mbedtls_sha3_family_functions {
mbedtls_sha3_id id;
uint16_t r;
uint16_t olen;
}
mbedtls_sha3_family_functions;
/*
* List of supported SHA-3 families
*/
static const mbedtls_sha3_family_functions sha3_families[] = {
{ MBEDTLS_SHA3_224, 1152, 224 },
{ MBEDTLS_SHA3_256, 1088, 256 },
{ MBEDTLS_SHA3_384, 832, 384 },
{ MBEDTLS_SHA3_512, 576, 512 },
{ MBEDTLS_SHA3_NONE, 0, 0 }
};
static const uint64_t rc[24] = {
0x0000000000000001, 0x0000000000008082, 0x800000000000808a, 0x8000000080008000,
0x000000000000808b, 0x0000000080000001, 0x8000000080008081, 0x8000000000008009,
@ -180,21 +161,27 @@ void mbedtls_sha3_clone(mbedtls_sha3_context *dst,
*/
int mbedtls_sha3_starts(mbedtls_sha3_context *ctx, mbedtls_sha3_id id)
{
const mbedtls_sha3_family_functions *p = NULL;
for (p = sha3_families; p->id != MBEDTLS_SHA3_NONE; p++) {
if (p->id == id) {
switch (id) {
case MBEDTLS_SHA3_224:
ctx->olen = 224 / 8;
ctx->max_block_size = 1152 / 8;
break;
}
case MBEDTLS_SHA3_256:
ctx->olen = 256 / 8;
ctx->max_block_size = 1088 / 8;
break;
case MBEDTLS_SHA3_384:
ctx->olen = 384 / 8;
ctx->max_block_size = 832 / 8;
break;
case MBEDTLS_SHA3_512:
ctx->olen = 512 / 8;
ctx->max_block_size = 576 / 8;
break;
default:
return MBEDTLS_ERR_SHA3_BAD_INPUT_DATA;
}
if (p->id == MBEDTLS_SHA3_NONE) {
return MBEDTLS_ERR_SHA3_BAD_INPUT_DATA;
}
ctx->olen = p->olen / 8;
ctx->max_block_size = p->r / 8;
memset(ctx->state, 0, sizeof(ctx->state));
ctx->index = 0;