mirror of https://github.com/aria2/aria2
108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2010 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "LibsslARC4Encryptor.h"
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#if OPENSSL_VERSION_NUMBER >= 0x30000000L
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# include <cassert>
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# include <openssl/core_names.h>
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# include "DlAbortEx.h"
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#endif // OPENSSL_VERSION_NUMBER >= 0x30000000L
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namespace aria2 {
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#if OPENSSL_VERSION_NUMBER >= 0x30000000L
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ARC4Encryptor::ARC4Encryptor() : ctx_{nullptr} {}
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ARC4Encryptor::~ARC4Encryptor()
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{
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if (ctx_) {
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EVP_CIPHER_CTX_free(ctx_);
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}
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}
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#else // !(OPENSSL_VERSION_NUMBER >= 0x30000000L)
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ARC4Encryptor::ARC4Encryptor() {}
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ARC4Encryptor::~ARC4Encryptor() = default;
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#endif // !(OPENSSL_VERSION_NUMBER >= 0x30000000L)
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void ARC4Encryptor::init(const unsigned char* key, size_t keyLength)
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{
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#if OPENSSL_VERSION_NUMBER >= 0x30000000L
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if (ctx_) {
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EVP_CIPHER_CTX_free(ctx_);
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}
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ctx_ = EVP_CIPHER_CTX_new();
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unsigned int keylen = keyLength;
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OSSL_PARAM params[] = {
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OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_KEYLEN, &keylen),
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OSSL_PARAM_construct_end(),
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};
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if (EVP_EncryptInit_ex2(ctx_, EVP_rc4(), nullptr, nullptr, params) != 1) {
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throw DL_ABORT_EX("Failed to initialize RC4 cipher");
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}
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if (EVP_EncryptInit_ex2(ctx_, nullptr, key, nullptr, nullptr) != 1) {
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throw DL_ABORT_EX("Failed to set key to RC4 cipher");
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}
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#else // !(OPENSSL_VERSION_NUMBER >= 0x30000000L)
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RC4_set_key(&key_, keyLength, key);
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#endif // !(OPENSSL_VERSION_NUMBER >= 0x30000000L)
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}
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void ARC4Encryptor::encrypt(size_t len, unsigned char* out,
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const unsigned char* in)
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{
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#if OPENSSL_VERSION_NUMBER >= 0x30000000L
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int outlen;
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if (EVP_EncryptUpdate(ctx_, out, &outlen, in, len) != 1) {
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throw DL_ABORT_EX("Failed to encrypt data with RC4 cipher");
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}
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assert(static_cast<size_t>(outlen) == len);
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#else // !(OPENSSL_VERSION_NUMBER >= 0x30000000L)
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RC4(&key_, len, in, out);
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#endif // !(OPENSSL_VERSION_NUMBER >= 0x30000000L)
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}
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} // namespace aria2
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