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gnutls_privkey_sign_hash2(3)        gnutls        gnutls_privkey_sign_hash2(3)


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 (C) 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/local/share/doc/gnutls/ directory does not contain the HTML
       form visit

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

gnutls                               3.7.9        gnutls_privkey_sign_hash2(3)

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