int gnutls_x509_privkey_export(gnutls_x509_privkey_t key, gnutls_x509_crt_fmt_t format, void * output_data, size_t * output_data_size);
ARGUMENTS
gnutls_x509_privkey_t key
Holds the key
gnutls_x509_crt_fmt_t format
the format of output params. One of PEM or DER.
void * output_data
will contain a private key PEM or DER encoded
size_t * output_data_size
holds the size of output_data (and will be
replaced by the actual size of parameters)
DESCRIPTION
This function will export the private key to a PKCS1 structure for
RSA keys, or an integer sequence for DSA keys. The DSA keys are in
the same format with the parameters used by openssl.
If the buffer provided is not long enough to hold the output, then
*output_data_size is updated and GNUTLS_E_SHORT_MEMORY_BUFFER
will be returned.
If the structure is PEM encoded, it will have a header
of "BEGIN RSA PRIVATE KEY".
RETURNS
On success, GNUTLS_E_SUCCESS is returned, otherwise a
negative error value.