gnutls_privkey_import_ext4(3) — Linux manual page


gnutls_privkey_import_ext4(3)      gnutls      gnutls_privkey_import_ext4(3)

NAME         top

       gnutls_privkey_import_ext4 - API function

SYNOPSIS         top

       #include <gnutls/abstract.h>

       int gnutls_privkey_import_ext4(gnutls_privkey_t pkey, void *
       userdata, gnutls_privkey_sign_data_func sign_data_fn,
       gnutls_privkey_sign_hash_func sign_hash_fn,
       gnutls_privkey_decrypt_func decrypt_fn, gnutls_privkey_deinit_func
       deinit_fn, gnutls_privkey_info_func info_fn, unsigned int flags);

ARGUMENTS         top

       gnutls_privkey_t pkey
                   The private key

       void * userdata
                   private data to be provided to the callbacks

       gnutls_privkey_sign_data_func sign_data_fn
                   callback for signature operations (may be NULL)

       gnutls_privkey_sign_hash_func sign_hash_fn
                   callback for signature operations (may be NULL)

       gnutls_privkey_decrypt_func decrypt_fn
                   callback for decryption operations (may be NULL)

       gnutls_privkey_deinit_func deinit_fn
                   a deinitialization function

       gnutls_privkey_info_func info_fn
                   returns info about the public key algorithm (should not
                   be NULL)

       unsigned int flags
                   Flags for the import

DESCRIPTION         top

       This function will associate the given callbacks with the
       gnutls_privkey_t type. At least one of the callbacks must be
       non-null. If a deinitialization function is provided then flags is
       assumed to contain GNUTLS_PRIVKEY_IMPORT_AUTO_RELEASE.

       Note that in contrast with the signing function of
       gnutls_privkey_import_ext3(), the signing functions provided to this
       function take explicitly the signature algorithm as parameter and
       different functions are provided to sign the data and hashes.

       The  sign_hash_fn is to be called to sign pre-hashed data. The input
       to the callback is the output of the hash (such as SHA256)
       corresponding to the signature algorithm. For RSA PKCS1 signatures,
       the signature algorithm can be set to GNUTLS_SIGN_RSA_RAW, and in
       that case the data should be handled as if they were an RSA PKCS1
       DigestInfo structure.

       The  sign_data_fn is to be called to sign data. The input data will
       be he data to be signed (and hashed), with the provided signature
       algorithm. This function is to be used for signature algorithms like
       Ed25519 which cannot take pre-hashed data as input.

       When both  sign_data_fn and  sign_hash_fn functions are provided they
       must be able to operate on all the supported signature algorithms,
       unless prohibited by the type of the algorithm (e.g., as with

       The  info_fn must provide information on the signature algorithms
       supported by this private key, and should support the flags
       GNUTLS_PRIVKEY_INFO_PK_ALGO_BITS.  It must return -1 on unknown

RETURNS         top

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

SINCE         top


REPORTING BUGS         top

       Report bugs to <>.
       Home page:

COPYRIGHT         top

       Copyright © 2001-2019 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         top

       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 

COLOPHON         top

       This page is part of the GnuTLS (GnuTLS Transport Layer Security
       Library) project.  Information about the project can be found at 
       ⟨⟩.  If you have a bug report for this manual
       page, send it to  This page was obtained from the
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gnutls                              3.6.9      gnutls_privkey_import_ext4(3)