crypto: Introduce x509 utils

An utility function for getting fingerprint from X.509 certificate
has been introduced. Implementation only provided using gnutls.

Signed-off-by: Dorjoy Chowdhury <dorjoychy111@gmail.com>
[DB: fixed missing gnutls_x509_crt_deinit in success path]
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
3 files changed