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esp32 hwcrypto: Make SHA-224 an obvious no-op for now

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This is not the long term solution...
This commit is contained in:
Angus Gratton
2016-09-05 10:36:25 +10:00
committed by Wu Jian Gang
parent 2bee84062a
commit 2580c07ae6
3 changed files with 12 additions and 9 deletions
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14
components/esp32/hwcrypto/sha.c
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@@ -138,10 +138,10 @@ void esp_sha256_start( SHA256_CTX *ctx, int is224 )
if ( is224 == 0 ) {
/* SHA-256 */
ctx->context_type = SHA256;
ctx->context_type = SHA2_256;
} else {
/* SHA-224 */
ctx->context_type = SHA224;
/* SHA-224 is not supported! */
ctx->context_type = SHA_INVALID;
}
}
@@ -158,7 +158,13 @@ void esp_sha256_update( SHA256_CTX *ctx, const unsigned char *input, size_t ilen
*/
void esp_sha256_finish( SHA256_CTX *ctx, unsigned char output[32] )
{
ets_sha_finish(&ctx->context, ctx->context_type, output);
if ( ctx->context_type == SHA2_256 ) {
ets_sha_finish(&ctx->context, ctx->context_type, output);
} else {
/* No hardware SHA-224 support, but mbedTLS API doesn't allow failure.
For now, zero the output to make it clear it's not valid. */
bzero( output, 28 );
}
esp_sha_release_hardware();
}