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gnutls_x509_crt_get_extension_info(3)                                   gnutls

NAME
       gnutls_x509_crt_get_extension_info - API function

SYNOPSIS
       #include <gnutls/x509.h>

       int gnutls_x509_crt_get_extension_info(gnutls_x509_crt_t cert, unsigned
       indx, void * oid, size_t * oid_size, unsigned int * critical);

ARGUMENTS
       gnutls_x509_crt_t cert
                   should contain a gnutls_x509_crt_t type

       unsigned indx
                   Specifies which extension OID to send. Use (0) to get the
                   first one.

       void * oid  a pointer to a structure to hold the OID

       size_t * oid_size
                   initially holds the maximum size of  oid , on return holds
                   actual size of  oid .

       unsigned int * critical
                   output variable with critical flag, may be NULL.

DESCRIPTION
       This function will return the requested extension OID in the
       certificate, and the critical flag for it.  The extension OID will be
       stored as a string in the provided buffer.  Use
       gnutls_x509_crt_get_extension() to extract the data.

       If the buffer provided is not long enough to hold the output, then
        oid_size is updated and GNUTLS_E_SHORT_MEMORY_BUFFER will be returned.
       The  oid returned will be null terminated, although
        oid_size will not account for the trailing null (the latter is not
       true for GnuTLS prior to 3.6.0).

RETURNS
       On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative
       error code is returned.  If you have reached the last extension
       available GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.

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_extension_info(3)