HTML rendering created 2025-09-06 byMichael Kerrisk, author ofThe Linux Programming Interface. For details of in-depthLinux/UNIX system programming training courses that I teach, lookhere. Hosting byjambit GmbH. |  |
NAME |SYNOPSIS |ARGUMENTS |DESCRIPTION |SINCE |REPORTING BUGS |COPYRIGHT |SEE ALSO |COLOPHON | |
gnutls_certif...ieve_function2(3) gnutlsgnutls_certif...ieve_function2(3)gnutls_certificate_set_retrieve_function2 - API function
#include <gnutls/abstract.h>voidgnutls_certificate_set_retrieve_function2(gnutls_certificate_credentials_tcred, gnutls_certificate_retrieve_function2 *func);
gnutls_certificate_credentials_t cred is agnutls_certificate_credentials_ttype. gnutls_certificate_retrieve_function2 * func is the callback function
This function sets a callback to be called in order to retrieve the certificate to be used in the handshake. The callback will take control only if a certificate is requested by the peer. The callback's function prototype is: int (*callback)(gnutls_session_t, const gnutls_datum_t* req_ca_dn, int nreqs, const gnutls_pk_algorithm_t* pk_algos, int pk_algos_length, gnutls_pcert_st** pcert, unsigned int *pcert_length, gnutls_privkey_t * pkey);req_ca_dn is only used in X.509 certificates. Contains a list with the CA names that the server considers trusted. This is a hint and typically the client should send a certificate that is signed by one of these CAs. These names, when available, are DER encoded. To get a more meaningful value use the functiongnutls_x509_rdn_get().pk_algos contains a list with server's acceptable public key algorithms. The certificate returned should support the server's given algorithms.pcert should contain a single certificate and public key or a list of them.pcert_length is the size of the previous list.pkey is the private key. If the callback function is provided then gnutls will call it, in the handshake, after the certificate request message has been received. All the provided by the callback values will not be released or modified by gnutls. In server side pk_algos and req_ca_dn are NULL. The callback function should set the certificate list to be sent, and return 0 on success. If no certificate was selected then the number of certificates should be set to zero. The value (-1) indicates error and the handshake will be terminated. If both certificates are set in the credentials and a callback is available, the callback takes predence.
3.0
Report bugs to <bugs@gnutls.org>. Home page:https://www.gnutls.org
Copyright © 2001-2023 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.
The full documentation forgnutlsis maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visithttps://www.gnutls.org/manual/
This page is part of theGnuTLS (GnuTLS Transport Layer Security Library) project. Information about the project can be found at ⟨http://www.gnutls.org/⟩. If you have a bug report for this manual page, send it to bugs@gnutls.org. This page was obtained from the tarball fetched from ⟨https://www.gnupg.org/ftp/gcrypt/gnutls/⟩ on 2025-08-11. If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which isnot part of the original manual page), send a mail to man-pages@man7.orggnutls 3.8.10gnutls_certif...ieve_function2(3)HTML rendering created 2025-09-06 byMichael Kerrisk, author ofThe Linux Programming Interface. For details of in-depthLinux/UNIX system programming training courses that I teach, lookhere. Hosting byjambit GmbH. | |