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Implement MBEDTLS_SHA256_NO_SHA224

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Manuel Pégourié-Gonnard 2019-07-16 14:39:55 +02:00
parent 9b781b2880
commit 8463d29156
2 changed files with 10 additions and 0 deletions
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2
include/mbedtls/sha256.h
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@ -60,8 +60,10 @@ typedef struct mbedtls_sha256_context
uint32_t total[2]; /*!< The number of Bytes processed. */ uint32_t total[2]; /*!< The number of Bytes processed. */
uint32_t state[8]; /*!< The intermediate digest state. */ uint32_t state[8]; /*!< The intermediate digest state. */
unsigned char buffer[64]; /*!< The data block being processed. */ unsigned char buffer[64]; /*!< The data block being processed. */
#if !defined(MBEDTLS_SHA256_NO_SHA224)
int is224; /*!< Determines which function to use: int is224; /*!< Determines which function to use:
0: Use SHA-256, or 1: Use SHA-224. */ 0: Use SHA-256, or 1: Use SHA-224. */
#endif
} }
mbedtls_sha256_context; mbedtls_sha256_context;

8
library/sha256.c
View File

@ -132,6 +132,9 @@ int mbedtls_sha256_starts_ret( mbedtls_sha256_context *ctx, int is224 )
} }
else else
{ {
#if defined(MBEDTLS_SHA256_NO_SHA224)
return( MBEDTLS_ERR_SHA256_BAD_INPUT_DATA );
#else
/* SHA-224 */ /* SHA-224 */
ctx->state[0] = 0xC1059ED8; ctx->state[0] = 0xC1059ED8;
ctx->state[1] = 0x367CD507; ctx->state[1] = 0x367CD507;
@ -141,9 +144,12 @@ int mbedtls_sha256_starts_ret( mbedtls_sha256_context *ctx, int is224 )
ctx->state[5] = 0x68581511; ctx->state[5] = 0x68581511;
ctx->state[6] = 0x64F98FA7; ctx->state[6] = 0x64F98FA7;
ctx->state[7] = 0xBEFA4FA4; ctx->state[7] = 0xBEFA4FA4;
#endif
} }
#if !defined(MBEDTLS_SHA256_NO_SHA224)
ctx->is224 = is224; ctx->is224 = is224;
#endif
return( 0 ); return( 0 );
} }
@ -395,7 +401,9 @@ int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
sha256_put_uint32_be( ctx->state[5], output, 20 ); sha256_put_uint32_be( ctx->state[5], output, 20 );
sha256_put_uint32_be( ctx->state[6], output, 24 ); sha256_put_uint32_be( ctx->state[6], output, 24 );
#if !defined(MBEDTLS_SHA256_NO_SHA224)
if( ctx->is224 == 0 ) if( ctx->is224 == 0 )
#endif
sha256_put_uint32_be( ctx->state[7], output, 28 ); sha256_put_uint32_be( ctx->state[7], output, 28 );
return( 0 ); return( 0 );