mirror of https://github.com/aria2/aria2
99 lines
2.7 KiB
C++
99 lines
2.7 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 "LibgcryptARC4Encryptor.h"
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#include <gcrypt.h>
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#include "DlAbortEx.h"
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#include "fmt.h"
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namespace aria2 {
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namespace {
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void handleError(gcry_error_t err)
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{
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throw DL_ABORT_EX
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(fmt("Exception in libgcrypt routine(ARC4Encryptor class): %s",
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gcry_strerror(err)));
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}
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} // namespace
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ARC4Encryptor::ARC4Encryptor()
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: hdl_(0)
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{}
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ARC4Encryptor::~ARC4Encryptor()
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{
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gcry_cipher_close(hdl_);
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}
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void ARC4Encryptor::init(const unsigned char* key, size_t keyLength)
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{
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int algo = GCRY_CIPHER_ARCFOUR;
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int mode = GCRY_CIPHER_MODE_STREAM;
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unsigned int flags = 0;
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gcry_error_t r;
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if((r = gcry_cipher_open(&hdl_, algo, mode, flags))) {
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handleError(r);
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}
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if((r = gcry_cipher_setkey(hdl_, key, keyLength))) {
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handleError(r);
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}
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if((r = gcry_cipher_setiv(hdl_, 0, 0))) {
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handleError(r);
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}
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}
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void ARC4Encryptor::encrypt
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(size_t len,
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unsigned char* out,
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const unsigned char* in)
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{
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size_t inlen;
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if(in == out) {
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out = const_cast<unsigned char*>(in);
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in = 0;
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inlen = 0;
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} else {
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inlen = len;
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}
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gcry_error_t r;
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if((r = gcry_cipher_encrypt(hdl_, out, len, in, inlen))) {
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handleError(r);
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}
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}
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} // namespace aria2
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