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Make SHA256_SMALLER option yield even smaller code

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Manuel Pégourié-Gonnard 2019-07-17 12:15:05 +02:00
parent ae3f8511fd
commit 100c057d0d
1 changed files with 19 additions and 10 deletions
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29
library/sha256.c
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@ -78,6 +78,15 @@ do { \
} while( 0 )
#endif
#if defined(MBEDTLS_SHA256_SMALLER)
static void sha256_put_uint32_be( uint32_t n, unsigned char *b, uint8_t i )
{
PUT_UINT32_BE(n, b, i);
}
#else
#define sha256_put_uint32_be PUT_UINT32_BE
#endif
void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
{
SHA256_VALIDATE( ctx != NULL );
@ -373,8 +382,8 @@ int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
| ( ctx->total[1] << 3 );
low = ( ctx->total[0] << 3 );
PUT_UINT32_BE( high, ctx->buffer, 56 );
PUT_UINT32_BE( low, ctx->buffer, 60 );
sha256_put_uint32_be( high, ctx->buffer, 56 );
sha256_put_uint32_be( low, ctx->buffer, 60 );
if( ( ret = mbedtls_internal_sha256_process( ctx, ctx->buffer ) ) != 0 )
return( ret );
@ -382,16 +391,16 @@ int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
/*
* Output final state
*/
PUT_UINT32_BE( ctx->state[0], output, 0 );
PUT_UINT32_BE( ctx->state[1], output, 4 );
PUT_UINT32_BE( ctx->state[2], output, 8 );
PUT_UINT32_BE( ctx->state[3], output, 12 );
PUT_UINT32_BE( ctx->state[4], output, 16 );
PUT_UINT32_BE( ctx->state[5], output, 20 );
PUT_UINT32_BE( ctx->state[6], output, 24 );
sha256_put_uint32_be( ctx->state[0], output, 0 );
sha256_put_uint32_be( ctx->state[1], output, 4 );
sha256_put_uint32_be( ctx->state[2], output, 8 );
sha256_put_uint32_be( ctx->state[3], output, 12 );
sha256_put_uint32_be( ctx->state[4], output, 16 );
sha256_put_uint32_be( ctx->state[5], output, 20 );
sha256_put_uint32_be( ctx->state[6], output, 24 );
if( ctx->is224 == 0 )
PUT_UINT32_BE( ctx->state[7], output, 28 );
sha256_put_uint32_be( ctx->state[7], output, 28 );
return( 0 );
}