Provided by: gnutls-doc_3.6.9-5ubuntu1_all
gnutls_pubkey_get_preferred_hash_algorithm - API function
#include <gnutls/abstract.h> int gnutls_pubkey_get_preferred_hash_algorithm(gnutls_pubkey_t key, gnutls_digest_algorithm_t * hash, unsigned int * mand);
gnutls_pubkey_t key Holds the certificate gnutls_digest_algorithm_t * hash The result of the call with the hash algorithm used for signature unsigned int * mand If non zero it means that the algorithm MUST use this hash. May be NULL.
This function will read the certificate and return the appropriate digest algorithm to use for signing with this certificate. Some certificates (i.e. DSA might not be able to sign without the preferred algorithm). To get the signature algorithm instead of just the hash use gnutls_pk_to_sign() with the algorithm of the certificate/key and the provided hash .
the 0 if the hash algorithm is found. A negative error code is returned on error.
Report bugs to <email@example.com>. Home page: https://www.gnutls.org
Copyright © 2001-2019 Free Software Foundation, Inc., and others. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.
The full documentation for gnutls is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit https://www.gnutls.org/manual/