gnutls_x509_crt_get_extension_info(3)

Linux manual pages	Section 3: Subroutines

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`,
	int `indx`,
	void * `oid`,
	size_t * `oid_size`,
	unsigned int * `critical)`;

ARGUMENTS

gnutls_x509_crt_t cert: should contain a gnutls_x509_crt_t structure
int 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_data() 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.

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 <bug-gnutls@gnu.org>.

General guidelines for reporting bugs: http://www.gnu.org/gethelp/