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gnutls_x509_crt_get_extension_by_oid(3) gnutls gnutls_x509_crt_get_extension_by_oid(3)

gnutls_x509_crt_get_extension_by_oid - API function

#include <gnutls/x509.h>

int gnutls_x509_crt_get_extension_by_oid(gnutls_x509_crt_t cert, const char * oid, unsigned indx, void * buf, size_t * buf_size, unsigned int * critical);

gnutls_x509_crt_t cert
should contain a gnutls_x509_crt_t type
const char * oid
holds an Object Identified in null terminated string
unsigned indx
In case multiple same OIDs exist in the extensions, this specifies which to send. Use (0) to get the first one.
void * buf
a pointer to a structure to hold the name (may be null)
size_t * buf_size
initially holds the size of buf
unsigned int * critical
will be non-zero if the extension is marked as critical

This function will return the extension specified by the OID in the certificate. The extensions will be returned as binary data DER encoded, in the provided buffer.

On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error code is returned. If the certificate does not contain the specified extension GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.

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

Copyright © 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.

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/
3.6.16 gnutls

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