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/*
* Copyright (c) 2021-2022 Ribose Inc.
* 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 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 "config.h"
#include "hash.hpp"
#include "types.h"
#include "utils.h"
#include "str-utils.h"
#include "hash_sha1cd.hpp"
#if defined(CRYPTO_BACKEND_BOTAN)
#include "hash_botan.hpp"
#endif
#if defined(CRYPTO_BACKEND_OPENSSL)
#include "hash_ossl.hpp"
#include "hash_crc24.hpp"
#endif
#include <set>
#include <iterator>
static const struct hash_alg_map_t {
pgp_hash_alg_t type;
const char * name;
size_t len;
} hash_alg_map[] = {{PGP_HASH_MD5, "MD5", 16},
{PGP_HASH_SHA1, "SHA1", 20},
{PGP_HASH_RIPEMD, "RIPEMD160", 20},
{PGP_HASH_SHA256, "SHA256", 32},
{PGP_HASH_SHA384, "SHA384", 48},
{PGP_HASH_SHA512, "SHA512", 64},
{PGP_HASH_SHA224, "SHA224", 28},
{PGP_HASH_SM3, "SM3", 32},
{PGP_HASH_SHA3_256, "SHA3-256", 32},
{PGP_HASH_SHA3_512, "SHA3-512", 64}};
namespace rnp {
pgp_hash_alg_t
Hash::alg() const
{
return alg_;
}
size_t
Hash::size() const
{
return Hash::size(alg_);
}
std::unique_ptr<Hash>
Hash::create(pgp_hash_alg_t alg)
{
if (alg == PGP_HASH_SHA1) {
return Hash_SHA1CD::create();
}
#if !defined(ENABLE_SM2)
if (alg == PGP_HASH_SM3) {
RNP_LOG("SM3 hash is not available.");
throw rnp_exception(RNP_ERROR_BAD_PARAMETERS);
}
#endif
#if defined(CRYPTO_BACKEND_OPENSSL)
return Hash_OpenSSL::create(alg);
#elif defined(CRYPTO_BACKEND_BOTAN)
return Hash_Botan::create(alg);
#else
#error "Crypto backend not specified"
#endif
}
std::unique_ptr<CRC24>
CRC24::create()
{
#if defined(CRYPTO_BACKEND_OPENSSL)
return CRC24_RNP::create();
#elif defined(CRYPTO_BACKEND_BOTAN)
return CRC24_Botan::create();
#else
#error "Crypto backend not specified"
#endif
}
void
Hash::add(const std::vector<uint8_t> &val)
{
add(val.data(), val.size());
}
void
Hash::add(uint32_t val)
{
uint8_t ibuf[4];
write_uint32(ibuf, val);
add(ibuf, sizeof(ibuf));
}
void
Hash::add(const pgp::mpi &val)
{
size_t len = val.size();
size_t idx = 0;
while ((idx < len) && (!val[idx])) {
idx++;
}
if (idx >= len) {
add(0);
return;
}
add(len - idx);
if (val[idx] & 0x80) {
uint8_t padbyte = 0;
add(&padbyte, 1);
}
add(val.data() + idx, len - idx);
}
std::vector<uint8_t>
Hash::finish()
{
std::vector<uint8_t> res(size_, 0);
finish(res.data());
return res;
}
rnp::secure_bytes
Hash::sec_finish()
{
rnp::secure_bytes res(size_, 0);
finish(res.data());
return res;
}
Hash::~Hash()
{
}
pgp_hash_alg_t
Hash::alg(const char *name)
{
if (!name) {
return PGP_HASH_UNKNOWN;
}
for (size_t i = 0; i < ARRAY_SIZE(hash_alg_map); i++) {
if (rnp::str_case_eq(name, hash_alg_map[i].name)) {
return hash_alg_map[i].type;
}
}
return PGP_HASH_UNKNOWN;
}
const char *
Hash::name(pgp_hash_alg_t alg)
{
const char *ret = NULL;
ARRAY_LOOKUP_BY_ID(hash_alg_map, type, name, alg, ret);
return ret;
}
size_t
Hash::size(pgp_hash_alg_t alg)
{
size_t val = 0;
ARRAY_LOOKUP_BY_ID(hash_alg_map, type, len, alg, val);
return val;
}
void
HashList::add_alg(pgp_hash_alg_t alg)
{
if (!get(alg)) {
hashes.emplace_back(std::make_pair(rnp::Hash::create(alg), std::vector<uint8_t>()));
}
}
const Hash *
HashList::get(pgp_hash_alg_t alg) const
{
for (auto &hash : hashes) {
if (hash.first->alg() == alg && hash.second.empty()) {
return hash.first.get();
}
}
return nullptr;
}
void
HashList::add(const void *buf, size_t len)
{
for (auto &hash : hashes) {
hash.first->add(buf, len);
}
}
std::vector<pgp_hash_alg_t>
HashList::hash_algs() const
{
std::set<pgp_hash_alg_t> algs;
for (auto &hash : hashes) {
algs.insert(hash.first->alg());
}
std::vector<pgp_hash_alg_t> result;
std::copy(algs.begin(), algs.end(), std::back_inserter(result));
return result;
}
#if defined(ENABLE_CRYPTO_REFRESH)
void
HashList::add_alg(pgp_hash_alg_t alg, std::vector<uint8_t> salt)
{
if (!get(alg, salt)) {
hashes.emplace_back(std::make_pair(rnp::Hash::create(alg), salt));
hashes.back().first->add(salt); // consume salt as first input
}
}
const Hash *
HashList::get(pgp_hash_alg_t alg, std::vector<uint8_t> salt) const
{
for (auto &hash : hashes) {
if (hash.first->alg() == alg && hash.second == salt) {
return hash.first.get();
}
}
return NULL;
}
#endif
} // namespace rnp