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/*
* Copyright (c) 2017-2022, [Ribose Inc](https://www.ribose.com).
* Copyright (c) 2009 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is originally derived from software contributed to
* The NetBSD Foundation by Alistair Crooks (agc@netbsd.org), and
* carried further by Ribose Inc (https://www.ribose.com).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <string.h>
#include "fingerprint.h"
#include "crypto/hash.hpp"
#include <librepgp/stream-key.h>
#include <librepgp/stream-sig.h>
#include <librepgp/stream-packet.h>
#include "utils.h"
rnp_result_t
pgp_fingerprint(pgp_fingerprint_t &fp, const pgp_key_pkt_t &key)
{
if ((key.version == PGP_V2) || (key.version == PGP_V3)) {
if (!is_rsa_key_alg(key.alg)) {
RNP_LOG("bad algorithm");
return RNP_ERROR_NOT_SUPPORTED;
}
try {
auto hash = rnp::Hash::create(PGP_HASH_MD5);
hash->add(key.material.rsa.n);
hash->add(key.material.rsa.e);
fp.length = hash->finish(fp.fingerprint);
return RNP_SUCCESS;
} catch (const std::exception &e) {
RNP_LOG("Failed to calculate v3 fingerprint: %s", e.what());
return RNP_ERROR_BAD_STATE;
}
}
if (key.version != PGP_V4) {
RNP_LOG("unsupported key version");
return RNP_ERROR_NOT_SUPPORTED;
}
try {
auto hash = rnp::Hash::create(PGP_HASH_SHA1);
signature_hash_key(key, *hash);
fp.length = hash->finish(fp.fingerprint);
return RNP_SUCCESS;
} catch (const std::exception &e) {
RNP_LOG("Failed to calculate v4 fingerprint: %s", e.what());
return RNP_ERROR_BAD_STATE;
}
}
/**
* \ingroup Core_Keys
* \brief Calculate the Key ID from the public key.
* \param keyid Space for the calculated ID to be stored
* \param key The key for which the ID is calculated
*/
rnp_result_t
pgp_keyid(pgp_key_id_t &keyid, const pgp_key_pkt_t &key)
{
pgp_fingerprint_t fp;
rnp_result_t ret;
size_t n;
if ((key.version == PGP_V2) || (key.version == PGP_V3)) {
if (!is_rsa_key_alg(key.alg)) {
RNP_LOG("bad algorithm");
return RNP_ERROR_NOT_SUPPORTED;
}
n = mpi_bytes(&key.material.rsa.n);
(void) memcpy(keyid.data(), key.material.rsa.n.mpi + n - keyid.size(), keyid.size());
return RNP_SUCCESS;
}
if ((ret = pgp_fingerprint(fp, key))) {
return ret;
}
(void) memcpy(keyid.data(), fp.fingerprint + fp.length - keyid.size(), keyid.size());
return RNP_SUCCESS;
}
bool
pgp_fingerprint_t::operator==(const pgp_fingerprint_t &src) const
{
return (length == src.length) && !memcmp(fingerprint, src.fingerprint, length);
}
bool
pgp_fingerprint_t::operator!=(const pgp_fingerprint_t &src) const
{
return !(*this == src);
}
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