summaryrefslogtreecommitdiffstats
path: root/tdewallet/backend/cbc.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'tdewallet/backend/cbc.cpp')
-rw-r--r--tdewallet/backend/cbc.cpp149
1 files changed, 149 insertions, 0 deletions
diff --git a/tdewallet/backend/cbc.cpp b/tdewallet/backend/cbc.cpp
new file mode 100644
index 000000000..7bc5f3891
--- /dev/null
+++ b/tdewallet/backend/cbc.cpp
@@ -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;
+}
+
+
+
+