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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 "hash_ossl.hpp"
#include <stdio.h>
#include <memory>
#include <cassert>
#include <openssl/err.h>
#include "config.h"
#include "types.h"
#include "utils.h"
#include "str-utils.h"
#include "defaults.h"
static const id_str_pair openssl_alg_map[] = {
{PGP_HASH_MD5, "md5"},
{PGP_HASH_SHA1, "sha1"},
{PGP_HASH_RIPEMD, "ripemd160"},
{PGP_HASH_SHA256, "sha256"},
{PGP_HASH_SHA384, "sha384"},
{PGP_HASH_SHA512, "sha512"},
{PGP_HASH_SHA224, "sha224"},
{PGP_HASH_SM3, "sm3"},
{PGP_HASH_SHA3_256, "sha3-256"},
{PGP_HASH_SHA3_512, "sha3-512"},
{0, NULL},
};
namespace rnp {
Hash_OpenSSL::Hash_OpenSSL(pgp_hash_alg_t alg) : Hash(alg)
{
const char * hash_name = Hash_OpenSSL::name_backend(alg);
const EVP_MD *hash_tp = EVP_get_digestbyname(hash_name);
if (!hash_tp) {
RNP_LOG("Error creating hash object for '%s'", hash_name);
throw rnp_exception(RNP_ERROR_BAD_STATE);
}
fn_ = EVP_MD_CTX_new();
if (!fn_) {
RNP_LOG("Allocation failure");
throw rnp_exception(RNP_ERROR_OUT_OF_MEMORY);
}
int res = EVP_DigestInit_ex(fn_, hash_tp, NULL);
if (res != 1) {
RNP_LOG("Digest initializataion error %d : %lu", res, ERR_peek_last_error());
EVP_MD_CTX_free(fn_);
throw rnp_exception(RNP_ERROR_BAD_STATE);
}
assert(size_ == (size_t) EVP_MD_size(hash_tp));
}
Hash_OpenSSL::Hash_OpenSSL(const Hash_OpenSSL &src) : Hash(src.alg_)
{
if (!src.fn_) {
throw rnp_exception(RNP_ERROR_BAD_PARAMETERS);
}
fn_ = EVP_MD_CTX_new();
if (!fn_) {
RNP_LOG("Allocation failure");
throw rnp_exception(RNP_ERROR_OUT_OF_MEMORY);
}
int res = EVP_MD_CTX_copy(fn_, src.fn_);
if (res != 1) {
RNP_LOG("Digest copying error %d: %lu", res, ERR_peek_last_error());
EVP_MD_CTX_free(fn_);
throw rnp_exception(RNP_ERROR_BAD_STATE);
}
}
std::unique_ptr<Hash_OpenSSL>
Hash_OpenSSL::create(pgp_hash_alg_t alg)
{
return std::unique_ptr<Hash_OpenSSL>(new Hash_OpenSSL(alg));
}
std::unique_ptr<Hash>
Hash_OpenSSL::clone() const
{
return std::unique_ptr<Hash>(new Hash_OpenSSL(*this));
}
void
Hash_OpenSSL::add(const void *buf, size_t len)
{
if (!fn_) {
throw rnp_exception(RNP_ERROR_NULL_POINTER);
}
int res = EVP_DigestUpdate(fn_, buf, len);
if (res != 1) {
RNP_LOG("Digest updating error %d: %lu", res, ERR_peek_last_error());
throw rnp_exception(RNP_ERROR_GENERIC);
}
}
size_t
Hash_OpenSSL::finish(uint8_t *digest)
{
if (!fn_) {
return 0;
}
int res = digest ? EVP_DigestFinal_ex(fn_, digest, NULL) : 1;
EVP_MD_CTX_free(fn_);
fn_ = NULL;
if (res != 1) {
RNP_LOG("Digest finalization error %d: %lu", res, ERR_peek_last_error());
return 0;
}
size_t outsz = size_;
size_ = 0;
return outsz;
}
Hash_OpenSSL::~Hash_OpenSSL()
{
if (!fn_) {
return;
}
EVP_MD_CTX_free(fn_);
}
const char *
Hash_OpenSSL::name_backend(pgp_hash_alg_t alg)
{
return id_str_pair::lookup(openssl_alg_map, alg);
}
} // namespace rnp