CASymCipherCTR.hpp

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/*
Copyright (c) 2000, The JAP-Team 
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 University of Technology Dresden, Germany 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 REGENTS 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, 
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*/
#ifndef __CASYMCIPHERCTR__
#define __CASYMCIPHERCTR__
 
 
#include "CALockAble.hpp"
#include "CAMutex.hpp"
#include "CASymChannelCipher.hpp"
//#define AES_NI
class CASymCipherCTR:public CASymChannelCipher
 
  {
    public:
      CASymCipherCTR()
        {
          m_bKeySet=false;
          m_ctxAES1=EVP_CIPHER_CTX_new();
          m_ctxAES2=EVP_CIPHER_CTX_new();
 
          m_iv1=new UINT8[16];
          m_iv2=new UINT8[16];
 
          m_pcsEnc = new CAMutex();
          m_pcsDec = new CAMutex();
        }
 
      ~CASymCipherCTR()
        {
#ifndef ONLY_LOCAL_PROXY
          waitForDestroy();
#endif
          delete[] m_iv1;
          m_iv1 = NULL;
          delete[] m_iv2;
          m_iv2 = NULL;
 
          delete m_pcsEnc;
          m_pcsEnc = NULL;
          delete m_pcsDec;
          m_pcsDec = NULL;
        }
      bool isKeyValid()
        {
          return m_bKeySet;
        }
 
      SINT32 setKey(const UINT8* key);  
      
      SINT32 setKeys(const UINT8* key,UINT32 keysize);  
      
      SINT32 setIVs(const UINT8* p_iv)
        {
          memcpy(m_iv1,p_iv,16);
          memcpy(m_iv2,p_iv,16);
          EVP_DecryptInit_ex(m_ctxAES1, EVP_aes_128_ctr(), NULL, key1, m_iv1);
          EVP_EncryptInit_ex(m_ctxAES2, EVP_aes_128_ctr(), NULL, key2, m_iv2);
          return E_SUCCESS;
        }
 
      SINT32 setIV2(const UINT8* p_iv)
        {
          memcpy(m_iv2,p_iv,16);
          EVP_EncryptInit_ex(m_ctxAES2, EVP_aes_128_ctr(), NULL, key2, m_iv2);
          return E_SUCCESS;
        }
 
      SINT32 crypt1(const UINT8* in,UINT8* out,UINT32 len);
      SINT32 crypt2(const UINT8* in,UINT8* out,UINT32 len);
 
    private:
      CAMutex* m_pcsEnc;
      CAMutex* m_pcsDec;
 
    protected:
 
 
      EVP_CIPHER_CTX *m_ctxAES1;
      EVP_CIPHER_CTX *m_ctxAES2;
      UINT8 key1[16];
      UINT8 key2[16];
 
 
      UINT8* m_iv1;
      UINT8* m_iv2;
      bool m_bKeySet;
  };
 
#endif