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Add a length check in ssl_derive_keys()

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Manuel Pégourié-Gonnard 2014-01-18 18:22:55 +01:00 committed by Paul Bakker
parent 2f5217ea02
commit 7cfdcb8c7f
1 changed files with 6 additions and 0 deletions
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6
library/ssl_tls.c
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@ -596,6 +596,12 @@ int ssl_derive_keys( ssl_context *ssl )
#if defined(POLARSSL_SSL_PROTO_SSL3) #if defined(POLARSSL_SSL_PROTO_SSL3)
if( ssl->minor_ver == SSL_MINOR_VERSION_0 ) if( ssl->minor_ver == SSL_MINOR_VERSION_0 )
{ {
if( transform->maclen > sizeof transform->mac_enc )
{
SSL_DEBUG_MSG( 1, ( "should never happen" ) );
return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
}
memcpy( transform->mac_enc, mac_enc, transform->maclen ); memcpy( transform->mac_enc, mac_enc, transform->maclen );
memcpy( transform->mac_dec, mac_dec, transform->maclen ); memcpy( transform->mac_dec, mac_dec, transform->maclen );
} }