1 files changed, 149 insertions, 0 deletions
diff --git a/kwallet/backend/cbc.cc b/kwallet/backend/cbc.cc
new file mode 100644
index 000000000..7bc5f3891
--- /dev/null
+++ b/kwallet/backend/cbc.cc
@@ -0,0 +1,149 @@
+/* This file is part of the KDE project
+   Copyright (C) 2001 George Staikos <staikos@kde.org>
+ 
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+ 
+   This library 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
+   Library General Public License for more details.
+ 
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+
+#include "cbc.h"
+#include <string.h>
+
+
+
+CipherBlockChain::CipherBlockChain(BlockCipher *cipher) : _cipher(cipher) {
+	_next = 0L;
+	_register = 0L;
+	_len = -1;
+	_reader = _writer = 0L;
+	if (cipher) {
+		_blksz = cipher->blockSize();
+	}
+}
+
+
+CipherBlockChain::~CipherBlockChain() {
+	delete[] (char *)_register;
+	_register = 0L;
+	delete[] (char *)_next;
+	_next = 0L;
+}
+
+
+bool CipherBlockChain::setKey(void *key, int bitlength) {
+	if (_cipher) {
+		return _cipher->setKey(key, bitlength);
+	}
+	return false;
+}
+
+
+int CipherBlockChain::keyLen() const {
+	if (_cipher) {
+		return _cipher->keyLen();
+	}
+	return -1;
+}
+
+
+bool CipherBlockChain::variableKeyLen() const {
+	if (_cipher) {
+		return _cipher->variableKeyLen();
+	}
+	return false;
+}
+
+
+bool CipherBlockChain::readyToGo() const {
+	if (_cipher) {
+		return _cipher->readyToGo();
+	}
+	return false;
+}
+
+
+int CipherBlockChain::encrypt(void *block, int len) {
+	if (_cipher && !_reader) {
+		int rc;
+
+		_writer |= 1;
+
+		if (!_register) {
+			_register = new unsigned char[len];
+			_len = len;
+			memset(_register, 0, len);
+		} else if (len > _len) {
+			return -1;
+		}
+
+		// This might be optimizable
+		char *tb = (char *)block;
+		for (int i = 0; i < len; i++) {
+			tb[i] ^= ((char *)_register)[i];
+		}
+
+		rc = _cipher->encrypt(block, len);
+
+		if (rc != -1) {
+			memcpy(_register, block, len);
+		}
+
+		return rc;
+	}
+	return -1;
+}
+
+
+int CipherBlockChain::decrypt(void *block, int len) {
+	if (_cipher && !_writer) {
+		int rc;
+
+		_reader |= 1;
+
+		if (!_register) {
+			_register = new unsigned char[len];
+			_len = len;
+			memset(_register, 0, len);
+		} else if (len > _len) {
+			return -1;
+		} 
+
+		if (!_next)
+			_next = new unsigned char[_len];
+		memcpy(_next, block, _len);
+
+		rc = _cipher->decrypt(block, len);
+
+		if (rc != -1) {
+			// This might be optimizable
+			char *tb = (char *)block;
+			for (int i = 0; i < len; i++) {
+				tb[i] ^= ((char *)_register)[i];
+			}
+		}
+
+		void *temp;
+		temp = _next;
+		_next = _register;
+		_register = temp;
+
+		return rc;
+	}
+	return -1;
+}
+
+
+
+