int gnutls_pubkey_set_key_usage(gnutls_pubkey_t key, unsigned int usage);
- gnutls_pubkey_t key
a certificate of type gnutls_x509_crt_t
- unsigned int usage
an ORed sequence of the GNUTLS_KEY_* elements.
This function will set the key usage flags of the public key. This is only useful if the key is to be exported to a certificate or certificate request.
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error value.
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