Linux manual pages Section 3: Subroutines  

Name

gnutls_privkey_sign_hash — API function

Synopsis

#include <gnutls/abstract.h>
int gnutls_privkey_sign_hash( gnutls_privkey_t signer,
  gnutls_digest_algorithm_t hash_algo,
  unsigned int flags,
  const gnutls_datum_t * hash_data,
  gnutls_datum_t * signature);
 

ARGUMENTS

gnutls_privkey_t signer

Holds the signer's key

gnutls_digest_algorithm_t hash_algo

The hash algorithm used

unsigned int flags

Zero or one of gnutls_privkey_flags_t

const gnutls_datum_t * hash_data

holds the data to be signed

gnutls_datum_t * signature

will contain newly allocated signature

DESCRIPTION

This function will sign the given hashed data using a signature algorithm supported by the private key. Signature algorithms are always used together with a hash functions. Different hash functions may be used for the RSA algorithm, but only SHA−XXX for the DSA keys.

You may use gnutls_pubkey_get_preferred_hash_algorithm() to determine the hash algorithm.

Note that if GNUTLS_PRIVKEY_SIGN_FLAG_TLS1_RSA flag is specified this function will ignore hash_algo and perform a raw PKCS1 signature.

RETURNS

On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error value.

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.