NAME

       gnutls_privkey_sign_hash2 - API function

SYNOPSIS

       #include <gnutls/abstract.h>

       int  gnutls_privkey_sign_hash2(gnutls_privkey_t signer, gnutls_sign_algorithm_t 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_sign_algorithm_t algo
                   The signature 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 the specified signature algorithm. This  function  is
       an  enhancement  of  gnutls_privkey_sign_hash(), as it allows utilizing a alternative signature algorithm
       where possible (e.g, use an RSA key with RSA-PSS).

       The flags may be GNUTLS_PRIVKEY_SIGN_FLAG_TLS1_RSA.  In that case this function  will  ignore   hash_algo
       and perform a raw PKCS1 signature.  Note that this flag is supported since 3.6.9.

       Note  also  that,  not  all  algorithm  support  signing  already hashed data. When signing with Ed25519,
       gnutls_privkey_sign_data2() should be used instead.

RETURNS

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

SINCE

       3.6.0

REPORTING BUGS

       Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org

COPYRIGHT

       Copyright © 2001- 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

       https://www.gnutls.org/manual/