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/*
* Copyright (C) 2002, 2003, 2004, 2005, 2008, 2010 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*
*/
/* Compatibility functions on OpenPGP key parsing.
*/
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <gnutls_openpgp.h>
#include <openpgp_int.h>
/*-
* gnutls_openpgp_verify_key:
* @cert_list: the structure that holds the certificates.
* @cert_list_lenght: the items in the cert_list.
* @status: the output of the verification function
*
* Verify all signatures in the certificate list. When the key
* is not available, the signature is skipped.
*
* The return value is one of the CertificateStatus entries.
*
* NOTE: this function does not verify using any "web of trust". You
* may use GnuPG for that purpose, or any other external PGP application.
-*/
int
_gnutls_openpgp_verify_key (const gnutls_certificate_credentials_t cred,
const gnutls_datum_t * cert_list,
int cert_list_length, unsigned int *status)
{
int ret = 0;
gnutls_openpgp_crt_t key = NULL;
unsigned int verify = 0, verify_self = 0;
if (!cert_list || cert_list_length != 1)
{
gnutls_assert ();
return GNUTLS_E_NO_CERTIFICATE_FOUND;
}
ret = gnutls_openpgp_crt_init (&key);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret =
gnutls_openpgp_crt_import (key, &cert_list[0], GNUTLS_OPENPGP_FMT_RAW);
if (ret < 0)
{
gnutls_assert ();
goto leave;
}
if (cred->keyring != NULL)
{
ret = gnutls_openpgp_crt_verify_ring (key, cred->keyring, 0, &verify);
if (ret < 0)
{
gnutls_assert ();
goto leave;
}
}
/* Now try the self signature. */
ret = gnutls_openpgp_crt_verify_self (key, 0, &verify_self);
if (ret < 0)
{
gnutls_assert ();
goto leave;
}
*status = verify_self | verify;
/* If we only checked the self signature. */
if (!cred->keyring)
*status |= GNUTLS_CERT_SIGNER_NOT_FOUND;
ret = 0;
leave:
gnutls_openpgp_crt_deinit (key);
return ret;
}
/*-
* gnutls_openpgp_fingerprint:
* @cert: the raw data that contains the OpenPGP public key.
* @fpr: the buffer to save the fingerprint.
* @fprlen: the integer to save the length of the fingerprint.
*
* Returns the fingerprint of the OpenPGP key. Depence on the algorithm,
* the fingerprint can be 16 or 20 bytes.
-*/
int
_gnutls_openpgp_fingerprint (const gnutls_datum_t * cert,
unsigned char *fpr, size_t * fprlen)
{
gnutls_openpgp_crt_t key;
int ret;
ret = gnutls_openpgp_crt_init (&key);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret = gnutls_openpgp_crt_import (key, cert, GNUTLS_OPENPGP_FMT_RAW);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret = gnutls_openpgp_crt_get_fingerprint (key, fpr, fprlen);
gnutls_openpgp_crt_deinit (key);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
return 0;
}
/*-
* gnutls_openpgp_get_raw_key_creation_time:
* @cert: the raw data that contains the OpenPGP public key.
*
* Returns the timestamp when the OpenPGP key was created.
-*/
time_t
_gnutls_openpgp_get_raw_key_creation_time (const gnutls_datum_t * cert)
{
gnutls_openpgp_crt_t key;
int ret;
time_t tim;
ret = gnutls_openpgp_crt_init (&key);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret = gnutls_openpgp_crt_import (key, cert, GNUTLS_OPENPGP_FMT_RAW);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
tim = gnutls_openpgp_crt_get_creation_time (key);
gnutls_openpgp_crt_deinit (key);
return tim;
}
/*-
* gnutls_openpgp_get_raw_key_expiration_time:
* @cert: the raw data that contains the OpenPGP public key.
*
* Returns the time when the OpenPGP key expires. A value of '0' means
* that the key doesn't expire at all.
-*/
time_t
_gnutls_openpgp_get_raw_key_expiration_time (const gnutls_datum_t * cert)
{
gnutls_openpgp_crt_t key;
int ret;
time_t tim;
ret = gnutls_openpgp_crt_init (&key);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret = gnutls_openpgp_crt_import (key, cert, GNUTLS_OPENPGP_FMT_RAW);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
tim = gnutls_openpgp_crt_get_expiration_time (key);
gnutls_openpgp_crt_deinit (key);
return tim;
}
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