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- /* Copyright (C) 2005-2011, Thorvald Natvig <thorvald@natvig.com>
- All rights reserved.
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- - Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
- - Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
- - Neither the name of the Mumble Developers nor the names of its
- contributors may be used to endorse or promote products derived from this
- software without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #pragma once
- #include <openssl/aes.h>
- #include <boost/noncopyable.hpp>
- namespace mumlib {
- class CryptState : boost::noncopyable {
- private:
- unsigned char raw_key[AES_BLOCK_SIZE];
- unsigned char encrypt_iv[AES_BLOCK_SIZE];
- unsigned char decrypt_iv[AES_BLOCK_SIZE];
- unsigned char decrypt_history[0x100];
- unsigned int uiGood;
- unsigned int uiLate;
- unsigned int uiLost;
- unsigned int uiResync;
- unsigned int uiRemoteGood;
- unsigned int uiRemoteLate;
- unsigned int uiRemoteLost;
- unsigned int uiRemoteResync;
- AES_KEY encrypt_key;
- AES_KEY decrypt_key;
- bool bInit;
- public:
- CryptState();
- bool isValid() const;
- void genKey();
- void setKey(const unsigned char *rkey, const unsigned char *eiv, const unsigned char *div);
- void setDecryptIV(const unsigned char *iv);
- const unsigned char* getEncryptIV() const;
- void ocb_encrypt(const unsigned char *plain, unsigned char *encrypted, unsigned int len,
- const unsigned char *nonce,
- unsigned char *tag);
- void ocb_decrypt(const unsigned char *encrypted, unsigned char *plain, unsigned int len,
- const unsigned char *nonce,
- unsigned char *tag);
- bool decrypt(const unsigned char *source, unsigned char *dst, unsigned int crypted_length);
- void encrypt(const unsigned char *source, unsigned char *dst, unsigned int plain_length);
- };
- };
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