gnutls_x509_crt_get_extension_by_oid man page on Archlinux
gnutls_x509_crt_get_extension_by_oid - API function
int gnutls_x509_crt_get_extension_by_oid(gnutls_x509_crt_t cert, const
char * oid, int indx, void * buf, size_t * buf_size, unsigned int *
should contain a gnutls_x509_crt_t structure
const char * oid
holds an Object Identified in null terminated string
int 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 speci‐
fied extension GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.
Report bugs to <email@example.com>.
Home page: http://www.gnutls.org
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Copying and distribution of this file, with or without modification,
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