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gnutls_x509_crq_get_key_id(3) — Linux manual page

gnutls_x509_crq_get_key_id(3)     gnutlsgnutls_x509_crq_get_key_id(3)

NAME        top

       gnutls_x509_crq_get_key_id - API function

SYNOPSIS        top

#include <gnutls/x509.h>int gnutls_x509_crq_get_key_id(gnutls_x509_crq_tcrq, unsigned intflags, unsigned char *output_data, size_t *output_data_size);

ARGUMENTS        top

       gnutls_x509_crq_t crq                   a certificate of typegnutls_x509_crq_t       unsigned int flags                   should be one of the flags fromgnutls_keyid_flags_t       unsigned char * output_data                   will contain the key ID       size_t * output_data_size                   holds the size of output_data (and will be replaced by                   the actual size of parameters)

DESCRIPTION        top

       This function will return a unique ID that depends on the public       key parameters.  This ID can be used in checking whether a       certificate corresponds to the given private key.       If the buffer provided is not long enough to hold the output, then       *output_data_size is updated and GNUTLS_E_SHORT_MEMORY_BUFFER       will be returned.  The output will normally be a SHA-1 hash       output, which is 20 bytes.

RETURNS        top

       In case of failure a negative error code will be returned, and 0       on success.

SINCE        top

       2.8.0

REPORTING BUGS        top

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

COPYRIGHT        top

       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.

SEE ALSO        top

       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/

COLOPHON        top

       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_x509_crq_get_key_id(3)

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