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/*
* All rights reserved.
*
* 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 OWNER 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 <cassert>
#include "crypto/hash.hpp"
#include <librepgp/stream-key.h>
#include <librepgp/stream-sig.h>
#include <librepgp/stream-packet.h>
#include "utils.h"
#include "fingerprint.hpp"
namespace pgp {
Fingerprint::Fingerprint() : keyid_({})
{
}
Fingerprint::Fingerprint(const uint8_t *data, size_t size) : Fingerprint()
{
fp_.assign(data, data + size);
}
Fingerprint::Fingerprint(const pgp_key_pkt_t &key)
{
switch (key.version) {
case PGP_V2:
case PGP_V3: {
/* v2/3 fingerprint is calculated from RSA public numbers */
if (!is_rsa_key_alg(key.alg)) {
RNP_LOG("bad algorithm");
throw rnp::rnp_exception(RNP_ERROR_NOT_SUPPORTED);
}
auto &rsa = dynamic_cast<const pgp::RSAKeyMaterial &>(*key.material);
auto hash = rnp::Hash::create(PGP_HASH_MD5);
hash->add(rsa.n());
hash->add(rsa.e());
fp_ = hash->finish();
/* keyid just low bytes of RSA n */
size_t n = rsa.n().size();
size_t sz = std::min(rsa.n().size(), keyid_.size());
std::memcpy(keyid_.data(), rsa.n().data() + n - sz, sz);
return;
}
case PGP_V4:
case PGP_V5:
#if defined(ENABLE_CRYPTO_REFRESH)
case PGP_V6:
#endif
{
auto halg = key.version == PGP_V4 ? PGP_HASH_SHA1 : PGP_HASH_SHA256;
auto hash = rnp::Hash::create(halg);
signature_hash_key(key, *hash, key.version);
fp_ = hash->finish();
/* keyid */
if (key.version == PGP_V4) {
assert(fp_.size() == PGP_FINGERPRINT_V4_SIZE);
const size_t inc = PGP_FINGERPRINT_V4_SIZE - PGP_KEY_ID_SIZE;
memcpy(keyid_.data(), fp_.data() + inc, keyid_.size());
} else {
memcpy(keyid_.data(), fp_.data(), keyid_.size());
}
return;
}
default:
RNP_LOG("unsupported key version");
throw rnp::rnp_exception(RNP_ERROR_NOT_SUPPORTED);
}
}
bool
Fingerprint::operator==(const Fingerprint &src) const
{
return fp_ == src.fp_;
}
bool
Fingerprint::operator!=(const Fingerprint &src) const
{
return !(*this == src);
}
bool
Fingerprint::size_valid(size_t size) noexcept
{
return (size == PGP_FINGERPRINT_V4_SIZE) || (size == PGP_FINGERPRINT_V3_SIZE) ||
(size == PGP_FINGERPRINT_V5_SIZE)
#if defined(ENABLE_CRYPTO_REFRESH)
|| (size == PGP_FINGERPRINT_V6_SIZE)
#endif
;
}
const KeyID &
Fingerprint::keyid() const noexcept
{
return keyid_;
}
const std::vector<uint8_t> &
Fingerprint::vec() const noexcept
{
return fp_;
}
const uint8_t *
Fingerprint::data() const noexcept
{
return fp_.data();
}
size_t
Fingerprint::size() const noexcept
{
return fp_.size();
}
} // namespace pgp