Initial import

[umurmur.git] / src / crypt.h

diff --git a/src/crypt.h b/src/crypt.h
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+++ b/src/crypt.h
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+/* Copyright (C) 2009, Martin Johansson <martin@fatbob.nu>
+   Copyright (C) 2005-2009, 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 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.
+*/
+#ifndef _CRYPTSTATE_H
+#define _CRYPTSTATE_H
+
+#include <openssl/rand.h>
+#include <openssl/aes.h>
+#include <stdint.h>
+#include "timer.h"
+#include "types.h"
+
+typedef struct CryptState {
+       uint8_t raw_key[AES_BLOCK_SIZE];
+       uint8_t encrypt_iv[AES_BLOCK_SIZE];
+       uint8_t decrypt_iv[AES_BLOCK_SIZE];
+       uint8_t 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;
+       etimer_t tLastGood;
+       etimer_t tLastRequest;
+       bool_t bInit;   
+} cryptState_t;
+
+void CryptState_init(cryptState_t *cs);
+bool_t CryptState_isValid(cryptState_t *cs);
+void CryptState_genKey(cryptState_t *cs);
+void CryptState_setKey(cryptState_t *cs, const unsigned char *rkey, const unsigned char *eiv, const unsigned char *div);
+void CryptState_setDecryptIV(cryptState_t *cs, const unsigned char *iv);
+
+bool_t CryptState_decrypt(cryptState_t *cs, const unsigned char *source, unsigned char *dst, unsigned int crypted_length);
+void CryptState_encrypt(cryptState_t *cs, const unsigned char *source, unsigned char *dst, unsigned int plain_length);
+#endif