gnutls_privkey_sign_hash(3) gnutls gnutls_privkey_sign_hash(3)
NAME
gnutls_privkey_sign_hash - API function
SYNOPSIS
#include <gnutls/abstract.h>
gnutls_privkey_sign_hash(3) 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 algo-
rithm 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.
The flags may be GNUTLS_PRIVKEY_SIGN_FLAG_TLS1_RSA or
GNUTLS_PRIVKEY_SIGN_FLAG_RSA_PSS. In the former case this function
will ignore hash_algo and perform a raw PKCS1 signature, and in the
latter an RSA-PSS signature will be generated.
Note that, not all algorithm support signing already hashed data. When
signing with Ed25519, gnutls_privkey_sign_data() should be used.
RETURNS
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative
error value.
SINCE
2.12.0
REPORTING BUGS
Report bugs to <bugs@gnutls.org>.
Home page: http://www.gnutls.org
COPYRIGHT
Copyright (C) 2001-2018 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.
SEE ALSO
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
http://www.gnutls.org/manual/
gnutls 3.6.5 gnutls_privkey_sign_hash(3)
gnutls 3.6.5 - Generated Sun Jan 20 13:32:49 CST 2019