diff options
Diffstat (limited to 'indra/llmessage/llxorcipher.cpp')
| -rw-r--r-- | indra/llmessage/llxorcipher.cpp | 256 |
1 files changed, 128 insertions, 128 deletions
diff --git a/indra/llmessage/llxorcipher.cpp b/indra/llmessage/llxorcipher.cpp index 17651b1ecf..2770200fe5 100644 --- a/indra/llmessage/llxorcipher.cpp +++ b/indra/llmessage/llxorcipher.cpp @@ -1,128 +1,128 @@ -/** - * @file llxorcipher.cpp - * @brief Implementation of LLXORCipher - * - * $LicenseInfo:firstyear=2003&license=viewerlgpl$ - * Second Life Viewer Source Code - * Copyright (C) 2010, Linden Research, Inc. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; - * version 2.1 of the License only. - * - * 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA - * $/LicenseInfo$ - */ - -#include "linden_common.h" - -#include "llxorcipher.h" - -#include "llerror.h" - -///---------------------------------------------------------------------------- -/// Class LLXORCipher -///---------------------------------------------------------------------------- - -LLXORCipher::LLXORCipher(const U8* pad, U32 pad_len) : - mPad(NULL), - mHead(NULL), - mPadLen(0) -{ - init(pad, pad_len); -} - -// Destroys the object -LLXORCipher::~LLXORCipher() -{ - init(NULL, 0); -} - -LLXORCipher::LLXORCipher(const LLXORCipher& cipher) : - mPad(NULL), - mHead(NULL), - mPadLen(0) -{ - init(cipher.mPad, cipher.mPadLen); -} - -LLXORCipher& LLXORCipher::operator=(const LLXORCipher& cipher) -{ - if(this == &cipher) return *this; - init(cipher.mPad, cipher.mPadLen); - return *this; -} - -U32 LLXORCipher::encrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len) -{ - if(!src || !src_len || !dst || !dst_len || !mPad) return 0; - U8* pad_end = mPad + mPadLen; - U32 count = src_len; - while(count--) - { - *dst++ = *src++ ^ *mHead++; - if(mHead >= pad_end) mHead = mPad; - } - return src_len; -} - -U32 LLXORCipher::decrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len) -{ - // xor is a symetric cipher, thus, just call the other function. - return encrypt(src, src_len, dst, dst_len); -} - -U32 LLXORCipher::requiredEncryptionSpace(U32 len) const -{ - return len; -} - -void LLXORCipher::init(const U8* pad, U32 pad_len) -{ - if(mPad) - { - delete [] mPad; - mPad = NULL; - mPadLen = 0; - } - if(pad && pad_len) - { - mPadLen = pad_len; - mPad = new U8[mPadLen]; - if (mPad != NULL) - { - memcpy(mPad, pad, mPadLen); /* Flawfinder : ignore */ - } - } - mHead = mPad; -} - -#ifdef _DEBUG -// static -bool LLXORCipher::testHarness() -{ - const U32 PAD_LEN = 3; - const U8 PAD[] = "abc"; - const S32 MSG_LENGTH = 12; - const char MESSAGE[MSG_LENGTH+1] = "gesundheight"; /* Flawfinder : ignore */ - U8 encrypted[MSG_LENGTH]; - U8 decrypted[MSG_LENGTH]; - - LLXORCipher cipher(PAD, PAD_LEN); - cipher.encrypt((U8*)MESSAGE, MSG_LENGTH, encrypted, MSG_LENGTH); - cipher.decrypt(encrypted, MSG_LENGTH, decrypted, MSG_LENGTH); - - if(0 != memcmp((void*)MESSAGE, decrypted, MSG_LENGTH)) return false; - return true; -} -#endif +/**
+ * @file llxorcipher.cpp
+ * @brief Implementation of LLXORCipher
+ *
+ * $LicenseInfo:firstyear=2003&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llxorcipher.h"
+
+#include "llerror.h"
+
+///----------------------------------------------------------------------------
+/// Class LLXORCipher
+///----------------------------------------------------------------------------
+
+LLXORCipher::LLXORCipher(const U8* pad, U32 pad_len) :
+ mPad(NULL),
+ mHead(NULL),
+ mPadLen(0)
+{
+ init(pad, pad_len);
+}
+
+// Destroys the object
+LLXORCipher::~LLXORCipher()
+{
+ init(NULL, 0);
+}
+
+LLXORCipher::LLXORCipher(const LLXORCipher& cipher) :
+ mPad(NULL),
+ mHead(NULL),
+ mPadLen(0)
+{
+ init(cipher.mPad, cipher.mPadLen);
+}
+
+LLXORCipher& LLXORCipher::operator=(const LLXORCipher& cipher)
+{
+ if(this == &cipher) return *this;
+ init(cipher.mPad, cipher.mPadLen);
+ return *this;
+}
+
+U32 LLXORCipher::encrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len)
+{
+ if(!src || !src_len || !dst || !dst_len || !mPad) return 0;
+ U8* pad_end = mPad + mPadLen;
+ U32 count = src_len;
+ while(count--)
+ {
+ *dst++ = *src++ ^ *mHead++;
+ if(mHead >= pad_end) mHead = mPad;
+ }
+ return src_len;
+}
+
+U32 LLXORCipher::decrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len)
+{
+ // xor is a symetric cipher, thus, just call the other function.
+ return encrypt(src, src_len, dst, dst_len);
+}
+
+U32 LLXORCipher::requiredEncryptionSpace(U32 len) const
+{
+ return len;
+}
+
+void LLXORCipher::init(const U8* pad, U32 pad_len)
+{
+ if(mPad)
+ {
+ delete [] mPad;
+ mPad = NULL;
+ mPadLen = 0;
+ }
+ if(pad && pad_len)
+ {
+ mPadLen = pad_len;
+ mPad = new U8[mPadLen];
+ if (mPad != NULL)
+ {
+ memcpy(mPad, pad, mPadLen); /* Flawfinder : ignore */
+ }
+ }
+ mHead = mPad;
+}
+
+#ifdef _DEBUG
+// static
+bool LLXORCipher::testHarness()
+{
+ const U32 PAD_LEN = 3;
+ const U8 PAD[] = "abc";
+ const S32 MSG_LENGTH = 12;
+ const char MESSAGE[MSG_LENGTH+1] = "gesundheight"; /* Flawfinder : ignore */
+ U8 encrypted[MSG_LENGTH];
+ U8 decrypted[MSG_LENGTH];
+
+ LLXORCipher cipher(PAD, PAD_LEN);
+ cipher.encrypt((U8*)MESSAGE, MSG_LENGTH, encrypted, MSG_LENGTH);
+ cipher.decrypt(encrypted, MSG_LENGTH, decrypted, MSG_LENGTH);
+
+ if(0 != memcmp((void*)MESSAGE, decrypted, MSG_LENGTH)) return false;
+ return true;
+}
+#endif
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