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Add a length check in ssl_derive_keys()

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This commit is contained in:
Paul Bakker 2014-07-07 15:30:20 +02:00
parent 511d809dd1
commit 4091141368
1 changed files with 6 additions and 0 deletions
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6
library/ssl_tls.c
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@ -526,6 +526,12 @@ int ssl_derive_keys( ssl_context *ssl )
transform->keylen, transform->minlen, transform->ivlen,
transform->maclen ) );
if( transform->maclen > sizeof transform->mac_enc )
{
SSL_DEBUG_MSG( 1, ( "should never happen" ) );
return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
}
/*
* Finally setup the cipher contexts, IVs and MAC secrets.
*/