CASymCipher.cpp

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/*
Copyright (c) 2000, The JAP-Team 
All rights reserved.
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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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*/
#include "StdAfx.h"
#include "CASymCipher.hpp"
//AES

SINT32 CASymCipher::setKey(const UINT8* key)
  {
    return setKey(key,true);
  }

SINT32 CASymCipher::setKey(const UINT8* key,bool bEncrypt)
  {
#ifdef INTEL_IPP_CRYPTO
    ippsRijndael128Init(key, IppsRijndaelKey128,m_keyAES1);
    ippsRijndael128Init(key, IppsRijndaelKey128,m_keyAES2);
#else
    if(bEncrypt)
      {
        AES_set_encrypt_key(key,128,m_keyAES1);
        AES_set_encrypt_key(key,128,m_keyAES2);
      }
    else
      {
        AES_set_decrypt_key(key,128,m_keyAES1);
        AES_set_decrypt_key(key,128,m_keyAES2);
      }
#endif
    memset(m_iv1,0,16);
    memset(m_iv2,0,16);
    m_bKeySet=true;
    return E_SUCCESS;
  }

SINT32 CASymCipher::setKeys(const UINT8* key,UINT32 keysize)
  {
    if(keysize==KEY_SIZE)
      {
        return setKey(key);
      }
    else if(keysize==2*KEY_SIZE)
      {
#ifdef INTEL_IPP_CRYPTO
        ippsRijndael128Init(key, IppsRijndaelKey128,m_keyAES1);
        ippsRijndael128Init(key+KEY_SIZE, IppsRijndaelKey128,m_keyAES2);
#else
        AES_set_encrypt_key(key,128,m_keyAES1);
        AES_set_encrypt_key(key+KEY_SIZE,128,m_keyAES2);
#endif
        memset(m_iv1,0,16);
        memset(m_iv2,0,16);
        m_bKeySet=true;
        return E_SUCCESS;
      }
    return E_UNKNOWN;
  }

SINT32 CASymCipher::crypt1(const UINT8* in,UINT8* out,UINT32 len)
  {
#ifdef INTEL_IPP_CRYPTO
        UINT32 k=len&0xFFFFFFF0;
        ippsRijndael128EncryptOFB(in,out,k,16, m_keyAES1,m_iv1);
//        if((len%16)!=0)
//          {
            ippsRijndael128EncryptOFB(in+k,out+k,len%16,len%16, m_keyAES1,m_iv1);
//          }
        return E_SUCCESS;
#endif
    UINT32 i=0;
    while(i+15<len)
      {
#ifdef INTEL_IPP_CRYPTO
        ippsRijndael128EncryptECB(m_iv1,m_iv1,KEY_SIZE, m_keyAES1, IppsCPPaddingNONE);
#else
        AES_encrypt(m_iv1,m_iv1,m_keyAES1);
#endif
        out[i]=in[i]^m_iv1[0];
        i++;
        out[i]=in[i]^m_iv1[1];
        i++;
        out[i]=in[i]^m_iv1[2];
        i++;
        out[i]=in[i]^m_iv1[3];
        i++;
        out[i]=in[i]^m_iv1[4];
        i++;
        out[i]=in[i]^m_iv1[5];
        i++;
        out[i]=in[i]^m_iv1[6];
        i++;
        out[i]=in[i]^m_iv1[7];
        i++;
        out[i]=in[i]^m_iv1[8];
        i++;
        out[i]=in[i]^m_iv1[9];
        i++;
        out[i]=in[i]^m_iv1[10];
        i++;
        out[i]=in[i]^m_iv1[11];
        i++;
        out[i]=in[i]^m_iv1[12];
        i++;
        out[i]=in[i]^m_iv1[13];
        i++;
        out[i]=in[i]^m_iv1[14];
        i++;
        out[i]=in[i]^m_iv1[15];
        i++;
      }
    if(i<len) //In this case len-i<16 !
      {
#ifdef INTEL_IPP_CRYPTO
        ippsRijndael128EncryptECB(m_iv1,m_iv1,KEY_SIZE, m_keyAES1, IppsCPPaddingNONE);
#else
        AES_encrypt(m_iv1,m_iv1,m_keyAES1);
#endif
        len-=i;
        for(UINT32 k=0;k<len;k++)
         {
           out[i]=in[i]^m_iv1[k];
           i++;
          }
      }
    return E_SUCCESS;
  }

SINT32 CASymCipher::crypt2(const UINT8* in,UINT8* out,UINT32 len)
  {
    UINT32 i=0;
    while(i+15<len)
      {
#ifdef INTEL_IPP_CRYPTO
        ippsRijndael128EncryptECB(m_iv1,m_iv1,KEY_SIZE, m_keyAES2, IppsCPPaddingNONE);
#else
        AES_encrypt(m_iv2,m_iv2,m_keyAES2);
#endif
        out[i]=in[i]^m_iv2[0];
        i++;
        out[i]=in[i]^m_iv2[1];
        i++;
        out[i]=in[i]^m_iv2[2];
        i++;
        out[i]=in[i]^m_iv2[3];
        i++;
        out[i]=in[i]^m_iv2[4];
        i++;
        out[i]=in[i]^m_iv2[5];
        i++;
        out[i]=in[i]^m_iv2[6];
        i++;
        out[i]=in[i]^m_iv2[7];
        i++;
        out[i]=in[i]^m_iv2[8];
        i++;
        out[i]=in[i]^m_iv2[9];
        i++;
        out[i]=in[i]^m_iv2[10];
        i++;
        out[i]=in[i]^m_iv2[11];
        i++;
        out[i]=in[i]^m_iv2[12];
        i++;
        out[i]=in[i]^m_iv2[13];
        i++;
        out[i]=in[i]^m_iv2[14];
        i++;
        out[i]=in[i]^m_iv2[15];
        i++;
      }
    if(i<len)
      {
#ifdef INTEL_IPP_CRYPTO
        ippsRijndael128EncryptECB(m_iv1,m_iv1,KEY_SIZE, m_keyAES2, IppsCPPaddingNONE);
#else
        AES_encrypt(m_iv2,m_iv2,m_keyAES2);
#endif
        len-=i;
        for(UINT32 k=0;k<len;k++)
         {
           out[i]=in[i]^m_iv2[k];
           i++;
          }
        }
    return E_SUCCESS;
  }

SINT32 CASymCipher::decrypt1CBCwithPKCS7(const UINT8* in,UINT8* out,UINT32* len)
  {
    if(in==NULL||out==NULL||len==NULL||*len==0)
      return E_UNKNOWN;
#ifdef INTEL_IPP_CRYPTO
#else
    AES_cbc_encrypt(in,out,*len,m_keyAES1,m_iv1,AES_DECRYPT);
    //Now remove padding
    UINT32 pad=out[*len-1];
    if(pad>16||pad>*len)
      return E_UNKNOWN;
    for(UINT32 i=*len-pad;i<*len-1;i++)
        if(out[i]!=pad)
          return E_UNKNOWN;
    *len-=pad;
#endif
    return E_SUCCESS;
  }

SINT32 CASymCipher::encrypt1CBCwithPKCS7(const UINT8* in,UINT32 inlen,UINT8* out,UINT32* len)
  {
#ifdef INTEL_IPP_CRYPTO
#else
    UINT32 padlen=16-(inlen%16);
    if(inlen+padlen>(*len))
      {
        return E_SPACE;
      }
    UINT8* tmp=new UINT8[inlen+padlen];
    memcpy(tmp,in,inlen);
    for(UINT32 i=inlen;i<inlen+padlen;i++)
      {
        tmp[i]=(UINT8)padlen;
      }
    AES_cbc_encrypt(tmp,out,inlen+padlen,m_keyAES1,m_iv1,AES_ENCRYPT);
    delete[] tmp;
    tmp = NULL;
    *len=inlen+padlen;
#endif
    return E_SUCCESS;
  } 

SINT32 CASymCipher::testSpeed()
  {
    const UINT32 runs=1000000;
    CASymCipher* pCipher=new CASymCipher();
    UINT8 key[16];
    UINT8* inBuff=new UINT8[1024];
    getRandom(key,16);
    getRandom(inBuff,1024);
    pCipher->setKey(key);
    UINT64 start,end;
    getcurrentTimeMillis(start);
    for(UINT32 i=0;i<runs;i++)
      {
        pCipher->crypt1(inBuff,inBuff,1023);
      }
    getcurrentTimeMillis(end);
    UINT32 d=diff64(end,start);
    printf("CASymCiper::testSpeed() takes %u ms for %u * 1023 Bytes!\n",d,runs);
    return E_SUCCESS;
  }

void CASymCipher::setGCMKeys(UINT8* keyRecv, UINT8* keySend) {
  m_pGCMCtxEnc = new gcm_ctx_64k;
  m_pGCMCtxDec = new gcm_ctx_64k;
  gcm_init_64k(m_pGCMCtxEnc, keySend, 128);
  gcm_init_64k(m_pGCMCtxDec, keyRecv, 128);
}

SINT32 CASymCipher::encryptMessage(const UINT8* in, UINT32 inlen, UINT8* out)
  {
    //m_pcsEnc->lock();
    m_pEncMsgIV[2] = htonl(m_nEncMsgCounter);
    m_nEncMsgCounter++;
    gcm_encrypt_64k(m_pGCMCtxEnc, m_pEncMsgIV, in, inlen, out, (UINT32*)(out + inlen));
    //m_pcsEnc->unlock();
    return E_SUCCESS;
  }

SINT32 CASymCipher::decryptMessage(const UINT8* in, UINT32 inlen, UINT8* out, bool integrityCheck) 
  {
    SINT32 ret = E_UNKNOWN;
    //m_pcsDec->lock();
    m_pDecMsgIV[2] = htonl(m_nDecMsgCounter);
    if (integrityCheck)
      {
        m_nDecMsgCounter++;
        ret = ::gcm_decrypt_64k(m_pGCMCtxDec, m_pDecMsgIV, in, inlen - 16, in + inlen - 16, out);
      }
    else
      {
        ret = ::gcm_decrypt_64k(m_pGCMCtxDec, m_pDecMsgIV, in, inlen, out);
      }
    //m_pcsDec->unlock();
    if(ret==0)
      return E_UNKNOWN;
    return E_SUCCESS;
  }