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ssl_decrypt_buf: remove code for hashes that aren't used in TLS

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Gilles Peskine 2018-06-04 12:03:30 +02:00
parent 5c38984fa7
commit d0e55a4657
1 changed files with 2 additions and 14 deletions
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16
library/ssl_tls.c
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@ -2013,22 +2013,11 @@ static int ssl_decrypt_buf( mbedtls_ssl_context *ssl )
size_t j, extra_run = 0; size_t j, extra_run = 0;
switch( ssl->transform_in->ciphersuite_info->mac ) switch( ssl->transform_in->ciphersuite_info->mac )
{ {
#if defined(MBEDTLS_MD2_C) #if defined(MBEDTLS_MD5_C) || defined(MBEDTLS_SHA1_C) || \
case MBEDTLS_MD_MD2: defined(MBEDTLS_SHA256_C)
/* no size prepended, 64-byte compression blocks */
extra_run = ( 13 + ssl->in_msglen + padlen ) / 64 -
( 13 + ssl->in_msglen ) / 64;
break;
#endif
#if defined(MBEDTLS_MD4_C) || defined(MBEDTLS_MD5_C) || \
case MBEDTLS_MD_MD4:
defined(MBEDTLS_SHA1_C) || defined(MBEDTLS_SHA256_C) \
defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_MD5: case MBEDTLS_MD_MD5:
case MBEDTLS_MD_SHA1: case MBEDTLS_MD_SHA1:
case MBEDTLS_MD_SHA224:
case MBEDTLS_MD_SHA256: case MBEDTLS_MD_SHA256:
case MBEDTLS_MD_RIPEMD160:
/* 8 bytes of message size, 64-byte compression blocks */ /* 8 bytes of message size, 64-byte compression blocks */
extra_run = ( 13 + ssl->in_msglen + padlen + 8 ) / 64 - extra_run = ( 13 + ssl->in_msglen + padlen + 8 ) / 64 -
( 13 + ssl->in_msglen + 8 ) / 64; ( 13 + ssl->in_msglen + 8 ) / 64;
@ -2036,7 +2025,6 @@ static int ssl_decrypt_buf( mbedtls_ssl_context *ssl )
#endif #endif
#if defined(MBEDTLS_SHA512_C) #if defined(MBEDTLS_SHA512_C)
case MBEDTLS_MD_SHA384: case MBEDTLS_MD_SHA384:
case MBEDTLS_MD_SHA512:
/* 16 bytes of message size, 128-byte compression blocks */ /* 16 bytes of message size, 128-byte compression blocks */
extra_run = ( 13 + ssl->in_msglen + padlen + 16 ) / 128 - extra_run = ( 13 + ssl->in_msglen + padlen + 16 ) / 128 -
( 13 + ssl->in_msglen + 16 ) / 128; ( 13 + ssl->in_msglen + 16 ) / 128;