TLS_RSA_NULL_MD5

[Nathan Redden]

I have been implementing a TLS 1.2 implementation using the GnuTLS library.  I have a requirement to be able to use no data encryption.  The cipher suite TLS_RSA_NULL_MD5 is listed in the supported cipher suites, but I cannot figure out how to force GnuTLS to only negotiate this.  I have tried all of the Common keywords and eliminated all ciphers and starting from NONE adding in the key exchange, compression, and MAC.  I have tried compatibility mode as well.

 

The handshake will either negotiate a cipher suite with a cipher or fail, I cannot determine a method to force TLS_RSA_NULL_MD5 to be selected.

 

Thanks for the help,

Nathan Redden

Application Developer

Convergent Communications Inc (CCI)