crypto.cpp

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/*
 * Copyright (C) 2019-2021 Tobias Flaig.
 *
 * This file is part of nawa.
 *
 * nawa is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License,
 * version 3, as published by the Free Software Foundation.
 *
 * nawa 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 nawa.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#include <nawa/Exception.h>
#include <nawa/util/crypto.h>
#include <nawa/util/utils.h>
#include <openssl/md5.h>
#include <openssl/sha.h>
 
using namespace nawa;
using namespace std;
 
string crypto::sha1(string const& input, bool hex) {
    auto sha1Base = (unsigned char const*) input.c_str();
    unsigned char sha1Hash[SHA_DIGEST_LENGTH];
    size_t sha1Size = input.size();
    SHA1(sha1Base, sha1Size, sha1Hash);
    string ret((char*) sha1Hash, SHA_DIGEST_LENGTH);
    if (hex) {
        return utils::hexDump(ret);
    }
    return ret;
}
 
string crypto::sha224(string const& input, bool hex) {
    auto sha2Base = (unsigned char const*) input.c_str();
    unsigned char sha2Hash[SHA224_DIGEST_LENGTH];
    size_t sha2Size = input.size();
    SHA224(sha2Base, sha2Size, sha2Hash);
    string ret((char*) sha2Hash, SHA224_DIGEST_LENGTH);
    if (hex) {
        return utils::hexDump(ret);
    }
    return ret;
}
 
string crypto::sha256(string const& input, bool hex) {
    auto sha2Base = (unsigned char const*) input.c_str();
    unsigned char sha2Hash[SHA256_DIGEST_LENGTH];
    size_t sha2Size = input.size();
    SHA256(sha2Base, sha2Size, sha2Hash);
    string ret((char*) sha2Hash, SHA256_DIGEST_LENGTH);
    if (hex) {
        return utils::hexDump(ret);
    }
    return ret;
}
 
string crypto::sha384(string const& input, bool hex) {
    auto sha2Base = (unsigned char const*) input.c_str();
    unsigned char sha2Hash[SHA384_DIGEST_LENGTH];
    size_t sha2Size = input.size();
    SHA384(sha2Base, sha2Size, sha2Hash);
    string ret((char*) sha2Hash, SHA384_DIGEST_LENGTH);
    if (hex) {
        return utils::hexDump(ret);
    }
    return ret;
}
 
string crypto::sha512(string const& input, bool hex) {
    auto sha2Base = (unsigned char const*) input.c_str();
    unsigned char sha2Hash[SHA512_DIGEST_LENGTH];
    size_t sha2Size = input.size();
    SHA512(sha2Base, sha2Size, sha2Hash);
    string ret((char*) sha2Hash, SHA512_DIGEST_LENGTH);
    if (hex) {
        return utils::hexDump(ret);
    }
    return ret;
}
 
string crypto::md5(string const& input, bool hex) {
    auto md5Base = (unsigned char const*) input.c_str();
    unsigned char md5Hash[MD5_DIGEST_LENGTH];
    size_t md5Size = input.size();
    MD5(md5Base, md5Size, md5Hash);
    string ret((char*) md5Hash, MD5_DIGEST_LENGTH);
    if (hex) {
        return utils::hexDump(ret);
    }
    return ret;
}
 
string crypto::passwordHash(string const& password, hashing::HashingEngine const& hashingEngine) {
    // use the provided HashingEngine for generation
    return hashingEngine.generateHash(password);
}
 
bool crypto::passwordVerify(string const& password, string const& hash, hashing::HashTypeTable const& hashTypeTable) {
    if (hash.empty()) {
        throw Exception(__PRETTY_FUNCTION__, 1, "Cannot verify an empty hash");
    }
 
    auto verifyer = hashTypeTable.getEngine(hash);
    if (verifyer.use_count() == 0) {
        throw Exception(__PRETTY_FUNCTION__, 2,
                        "Could not determine a HashingEngine that is able to verify the given hash");
    }
 
    return verifyer->verifyHash(password, hash);
}