Api function
#include <gnutls/x509.h>
int gnutls_x509_crt_get_issuer_dn2(gnutls_x509_crt_t cert, gnutls_datum_t * dn);
should contain a gnutls_x509_crt_t structure
a pointer to a structure to hold the name
This function will allocate buffer and copy the name of issuer of the Certificate. The name will be in the form "C=xxxx,O=yyyy,CN=zzzz" as described in RFC4514. The output string will be ASCII or UTF-8 encoded, depending on the certificate data.
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error value. and a negative error code on error.
3.1.10
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