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Disable MD5 in handshake signatures by default

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Manuel Pégourié-Gonnard 2015-12-04 15:02:56 +01:00
parent 5a8396ed55
commit b39528e2e8
3 changed files with 22 additions and 2 deletions
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5
ChangeLog
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@ -1,5 +1,10 @@
mbed TLS ChangeLog (Sorted per branch, date)
= mbed TLS 2.1.4 released 2015-12-xx
Security
* Disable MD5 for handshake signatures by default.
= mbed TLS 2.1.3 released 2015-11-04
Security

2
include/mbedtls/ssl.h
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@ -1553,7 +1553,7 @@ void mbedtls_ssl_conf_curves( mbedtls_ssl_config *conf,
#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
/**
* \brief Set the allowed hashes for signatures during the handshake.
* (Default: all available hashes.)
* (Default: all available hashes except MD5.)
*
* \note This only affects which hashes are offered and can be used
* for signatures during the handshake. Hashes for message

17
library/ssl_tls.c
View File

@ -7006,6 +7006,21 @@ void mbedtls_ssl_config_init( mbedtls_ssl_config *conf )
memset( conf, 0, sizeof( mbedtls_ssl_config ) );
}
static int ssl_preset_default_hashes[] = {
#if defined(MBEDTLS_SHA512_C)
MBEDTLS_MD_SHA512,
MBEDTLS_MD_SHA384,
#endif
#if defined(MBEDTLS_SHA256_C)
MBEDTLS_MD_SHA256,
MBEDTLS_MD_SHA224,
#endif
#if defined(MBEDTLS_SHA1_C)
MBEDTLS_MD_SHA1,
#endif
MBEDTLS_MD_NONE
};
static int ssl_preset_suiteb_ciphersuites[] = {
MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
@ -7162,7 +7177,7 @@ int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
#endif
#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
conf->sig_hashes = mbedtls_md_list();
conf->sig_hashes = ssl_preset_default_hashes;
#endif
#if defined(MBEDTLS_ECP_C)