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/*
* Copyright (C) 2002-2010, 2012 Free Software Foundation, Inc.
*
* Author: Timo Schulz, Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
/* Functions on OpenPGP key parsing
*/
#include <gnutls_int.h>
#include <openpgp_int.h>
#include <gnutls_errors.h>
#include <gnutls_openpgp.h>
#include <gnutls_num.h>
/**
* gnutls_openpgp_crt_verify_ring:
* @key: the structure that holds the key.
* @keyring: holds the keyring to check against
* @flags: unused (should be 0)
* @verify: will hold the certificate verification output.
*
* Verify all signatures in the key, using the given set of keys
* (keyring).
*
* The key verification output will be put in @verify and will be one
* or more of the #gnutls_certificate_status_t enumerated elements
* bitwise or'd.
*
* Note that this function does not verify using any "web of trust".
* You may use GnuPG for that purpose, or any other external PGP
* application.
*
* Returns: %GNUTLS_E_SUCCESS on success, or an error code.
**/
int
gnutls_openpgp_crt_verify_ring(gnutls_openpgp_crt_t key,
gnutls_openpgp_keyring_t keyring,
unsigned int flags, unsigned int *verify)
{
uint8_t id[GNUTLS_OPENPGP_KEYID_SIZE];
cdk_error_t rc;
int status;
if (!key || !keyring) {
gnutls_assert();
return GNUTLS_E_NO_CERTIFICATE_FOUND;
}
*verify = 0;
rc = cdk_pk_check_sigs(key->knode, keyring->db, &status);
if (rc == CDK_Error_No_Key) {
rc = GNUTLS_E_NO_CERTIFICATE_FOUND;
gnutls_assert();
return rc;
} else if (rc != CDK_Success) {
_gnutls_debug_log("cdk_pk_check_sigs: error %d\n", rc);
rc = _gnutls_map_cdk_rc(rc);
gnutls_assert();
return rc;
}
_gnutls_debug_log("status: %x\n", status);
if (status & CDK_KEY_INVALID)
*verify |= GNUTLS_CERT_SIGNATURE_FAILURE;
if (status & CDK_KEY_REVOKED)
*verify |= GNUTLS_CERT_REVOKED;
if (status & CDK_KEY_NOSIGNER)
*verify |= GNUTLS_CERT_SIGNER_NOT_FOUND;
/* Check if the key is included in the ring. */
if (!(flags & GNUTLS_VERIFY_DO_NOT_ALLOW_SAME)) {
rc = gnutls_openpgp_crt_get_key_id(key, id);
if (rc < 0) {
gnutls_assert();
return rc;
}
rc = gnutls_openpgp_keyring_check_id(keyring, id, 0);
/* If it exists in the keyring don't treat it as unknown. */
if (rc == 0 && *verify & GNUTLS_CERT_SIGNER_NOT_FOUND)
*verify &= ~GNUTLS_CERT_SIGNER_NOT_FOUND;
}
if (*verify != 0)
*verify |= GNUTLS_CERT_INVALID;
return 0;
}
/**
* gnutls_openpgp_crt_verify_self:
* @key: the structure that holds the key.
* @flags: unused (should be 0)
* @verify: will hold the key verification output.
*
* Verifies the self signature in the key. The key verification
* output will be put in @verify and will be one or more of the
* gnutls_certificate_status_t enumerated elements bitwise or'd.
*
* Returns: %GNUTLS_E_SUCCESS on success, or an error code.
**/
int
gnutls_openpgp_crt_verify_self(gnutls_openpgp_crt_t key,
unsigned int flags, unsigned int *verify)
{
int status;
cdk_error_t rc;
*verify = 0;
rc = cdk_pk_check_self_sig(key->knode, &status);
if (rc || status != CDK_KEY_VALID)
*verify |=
GNUTLS_CERT_INVALID | GNUTLS_CERT_SIGNATURE_FAILURE;
else
*verify = 0;
return 0;
}
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