Linux manual pages Section 3: Subroutines  

Name

gnutls_pubkey_get_preferred_hash_algorithm — API function

Synopsis

#include <gnutls/abstract.h>
int gnutls_pubkey_get_preferred_hash_algorithm( gnutls_pubkey_t key,
  gnutls_digest_algorithm_t * hash,
  unsigned int * mand);
 

ARGUMENTS

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.

DESCRIPTION

This function will read the certifcate 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 .

RETURNS

the 0 if the hash algorithm is found. A negative error code is returned on error.

SINCE

2.12.0

REPORTING BUGS

Report bugs to <bug-gnutls@gnu.org>.

General guidelines for reporting bugs: http://www.gnu.org/gethelp/

GnuTLS home page: http://www.gnu.org/software/gnutls/

SEE ALSO

The full documentation for gnutls is maintained as a Texinfo manual. If the info and gnutls programs are properly installed at your site, the command

info gnutls

should give you access to the complete manual. As an alternative you may obtain the manual from:

COPYRIGHT

Copyright © 2001-2013 Free Software Foundation, Inc..

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.