int
get_pubkey(gnutls_datum_t * pk, const gnutls_datum_t * kr,
unsigned long kid)
{
unsigned char buf[4];
buf[0] = kid >> 24;
buf[1] = kid >> 16;
buf[2] = kid >> 8;
buf[3] = kid;
return gnutls_openpgp_get_key(pk, kr, KEY_ATTR_SHORT_KEYID, buf);
}
/*-
* _gnutls_openpgp_request_key - Receives a key from a database, key server etc
* @ret - a pointer to gnutls_datum_t structure.
* @cred - a gnutls_certificate_credentials_t structure.
* @key_fingerprint - The keyFingerprint
* @key_fingerprint_size - the size of the fingerprint
*
* Retrieves a key from a local database, keyring, or a key server. The
* return value is locally allocated.
*
-*/
int
_gnutls_openpgp_request_key (gnutls_session_t session, gnutls_datum_t * ret,
const gnutls_certificate_credentials_t cred,
opaque * key_fpr, int key_fpr_size)
{
int rc = 0;
if (!ret || !cred || !key_fpr)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
if (key_fpr_size != 16 && key_fpr_size != 20)
return GNUTLS_E_HASH_FAILED; /* only MD5 and SHA1 are supported */
rc = gnutls_openpgp_get_key (ret, cred->keyring, KEY_ATTR_FPR, key_fpr);
if (rc >= 0) /* key was found */
{
rc = 0;
goto error;
}
else
rc = GNUTLS_E_OPENPGP_GETKEY_FAILED;
/* If the callback function was set, then try this one. */
if (session->internals.openpgp_recv_key_func != NULL)
{
rc = session->internals.openpgp_recv_key_func (session,
key_fpr,
key_fpr_size, ret);
if (rc < 0)
{
gnutls_assert ();
rc = GNUTLS_E_OPENPGP_GETKEY_FAILED;
goto error;
}
}
error:
return rc;
}
