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hwcrypto sha: Feed one block at a time to hardware SHA implementation

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Fixes a bug where some longer block sizes produced incorrect results.
This commit is contained in:
Angus Gratton 2016-09-06 11:05:56 +10:00 committed by Wu Jian Gang
parent 0a970e3a25
commit a32e954f67
1 changed files with 15 additions and 3 deletions
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18
components/esp32/hwcrypto/sha.c
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@ -50,6 +50,18 @@ void esp_sha_release_hardware( void )
_lock_release(&sha_lock);
}
/* Generic esp_shaX_update implementation */
static void esp_sha_update( esp_sha_context *ctx, const unsigned char *input, size_t ilen, size_t block_size)
{
/* Feed the SHA engine one block at a time */
while(ilen > 0) {
size_t chunk_len = (ilen > block_size) ? block_size : ilen;
ets_sha_update(&ctx->context, ctx->context_type, input, chunk_len * 8);
input += chunk_len;
ilen -= chunk_len;
}
}
void esp_sha1_init( esp_sha_context *ctx )
{
bzero( ctx, sizeof( esp_sha_context ) );
@ -83,7 +95,7 @@ void esp_sha1_start( esp_sha_context *ctx )
*/
void esp_sha1_update( esp_sha_context *ctx, const unsigned char *input, size_t ilen )
{
ets_sha_update(&ctx->context, ctx->context_type, input, ilen * 8);
esp_sha_update(ctx, input, ilen, 64);
}
/*
@ -148,7 +160,7 @@ void esp_sha256_start( esp_sha_context *ctx, int is224 )
*/
void esp_sha256_update( esp_sha_context *ctx, const unsigned char *input, size_t ilen )
{
ets_sha_update(&ctx->context, ctx->context_type, input, ilen * 8);
esp_sha_update(ctx, input, ilen, 64);
}
/*
@ -223,7 +235,7 @@ void esp_sha512_start( esp_sha_context *ctx, int is384 )
*/
void esp_sha512_update( esp_sha_context *ctx, const unsigned char *input, size_t ilen )
{
ets_sha_update(&ctx->context, ctx->context_type, input, ilen * 8);
esp_sha_update(ctx, input, ilen, 128);
}
/*