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gnutls_x509_crt_get_extension_info - API function
int gnutls_x509_crt_get_extension_info(gnutls_x509_crt_t cert, unsigned
indx, void * oid, size_t * oid_size, unsigned int * critical);
should contain a gnutls_x509_crt_t type
Specifies which extension OID to send. Use (0) to get the
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.
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).
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.
Report bugs to <email@example.com>.
Home page: https://www.gnutls.org
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