NAME

       gnutls_x509_crq_get_key_id - API function

SYNOPSIS

       #include <gnutls/x509.h>

       int  gnutls_x509_crq_get_key_id(gnutls_x509_crq_t  crq,  unsigned int flags, unsigned char * output_data,
       size_t * output_data_size);

ARGUMENTS

       gnutls_x509_crq_t crq
                   a certificate of type gnutls_x509_crq_t

       unsigned int flags
                   should be one of the flags from gnutls_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

       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

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

SINCE

       2.8.0

REPORTING BUGS

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

COPYRIGHT

       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

       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/

gnutls                                                3.8.9                        gnutls_x509_crq_get_key_id(3)