GNU TLS 2.9.9 , sign/hash extension support

[Manish Patidar]

Hi ,

I was going through the GNU TLS 2.9.9 source code that support TLS 1.2.  
I have following doubts in gnutls that support of TLS 1.2 rfc

1. While selecting server cert and chain,  GNUTLS just compare server certificate with client requested sign/hash extension, not the whole chain.
    if it matched one of the server certificate , it will select the chain.
    but according to TLS 1.2 , whole chain must matched with one of the sign/hash algo supported by client.

    Is my understanding is correct ..?
   
    If not , how and which part of code GNU TLS compare the sign/hash algo with the whole chain. 

2. While selecting client cert list in response of client cert request, GNU TLS doesn't use parsed sign/hash algo supported server.
    it just use the cert type and dns name for selecting cert chain ,not sign/hash algo  
    but according to TLS 1.2 , client must compare and select cert chain that matches with one of the sign/hash supported by server.  


    Please let me know if am correct or not.

    Please provide some of your valuable inputs which clarify above point  
  
Regards
Manish