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Merge remote-tracking branch 'upstream-public/pr/1464' into mbedtls-2.7-proposed

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Jaeden Amero 2018-04-03 18:27:54 +01:00
parent b5f53b1039 f3df741d8f
commit d8e0cec63b
2 changed files with 10 additions and 2 deletions
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3
ChangeLog
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@ -53,6 +53,9 @@ Changes
* Verify that when (f_send, f_recv and f_recv_timeout) send or receive
more than the required length an error is returned. Raised by
Sam O'Connor in #1245.
* Improve robustness of mbedtls_ssl_derive_keys against the use of
HMAC functions with non-HMAC ciphersuites. Independently contributed
by Jiayuan Chen in #1377. Fixes #1437.
= mbed TLS 2.7.2 branch released 2018-03-16

9
library/ssl_tls.c
View file

@ -855,8 +855,13 @@ int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
defined(MBEDTLS_SSL_PROTO_TLS1_2)
if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
{
mbedtls_md_hmac_starts( &transform->md_ctx_enc, mac_enc, mac_key_len );
mbedtls_md_hmac_starts( &transform->md_ctx_dec, mac_dec, mac_key_len );
/* For HMAC-based ciphersuites, initialize the HMAC transforms.
For AEAD-based ciphersuites, there is nothing to do here. */
if( mac_key_len != 0 )
{
mbedtls_md_hmac_starts( &transform->md_ctx_enc, mac_enc, mac_key_len );
mbedtls_md_hmac_starts( &transform->md_ctx_dec, mac_dec, mac_key_len );
}
}
else
#endif