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gnutls_x509_crt_get_key_id(3)       gnutls       gnutls_x509_crt_get_key_id(3)

NAME
       gnutls_x509_crt_get_key_id - API function

SYNOPSIS
       #include <gnutls/x509.h>

       int gnutls_x509_crt_get_key_id(gnutls_x509_crt_t crt, unsigned int
       flags, unsigned char * output_data, size_t * output_data_size);

ARGUMENTS
       gnutls_x509_crt_t crt
                   Holds the certificate

       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.

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_x509_crt_get_key_id(3)