CABase64.cpp

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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,
 OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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 */
#include "StdAfx.h"
#include "CABase64.hpp"
 
SINT32 CABase64::decode(const UINT8*in, UINT32 inlen, UINT8*out, UINT32*outlen)
  {
    if (outlen == NULL)
      return E_UNKNOWN;
    if (in == NULL || inlen == 0)
      {
        *outlen = 0;
        return E_SUCCESS;
      }
    EVP_ENCODE_CTX* pCTX = NULL;
#if OPENSSL_VERSION_NUMBER > 0x100020cfL
    pCTX=EVP_ENCODE_CTX_new();
#else
    pCTX = new EVP_ENCODE_CTX;
#endif
    EVP_DecodeInit(pCTX);
    int len = 0;
    *outlen = 0;
    SINT32 ret = -1;
    //ensure that in and out are disjunct - otherwise copy in
    if (((out >= in) && (in + inlen > out)) || ((out < in) && (out + *outlen > in)))
      {
        UINT8*tmpIn = new UINT8[inlen];
        memcpy(tmpIn, in, inlen);
        ret = EVP_DecodeUpdate(pCTX, out, (int*) outlen, tmpIn, (int) inlen);
        delete[] tmpIn;
        tmpIn = NULL;
      }
    else
      {
        ret = EVP_DecodeUpdate(pCTX, out, (int*) outlen, (unsigned char*) in, (int) inlen);
      }
    if (ret < 0 || EVP_DecodeFinal(pCTX, out + (*outlen), &len) < 0)
      {
        ret=E_UNKNOWN;
      }
    else
      {
      (*outlen) += len;
      ret = E_SUCCESS;
      }
#if OPENSSL_VERSION_NUMBER > 0x100020cfL
    EVP_ENCODE_CTX_free(pCTX);
#else
    delete pCTX;
#endif
 
    return ret;
  }
 
SINT32 CABase64::encode(const UINT8*in, UINT32 inlen, UINT8*out, UINT32*outlen)
  {
    if (outlen == NULL)
      return E_UNKNOWN;
    if (in == NULL || inlen == 0)
      {
        *outlen = 0;
        return E_SUCCESS;
      }
    if (inlen > *outlen)
      return E_UNKNOWN;
    EVP_ENCODE_CTX* pCTX = NULL;
#if OPENSSL_VERSION_NUMBER > 0x100020cfL
    pCTX=EVP_ENCODE_CTX_new();
#else
    pCTX = new EVP_ENCODE_CTX;
#endif
    EVP_EncodeInit(pCTX);
    UINT32 len = 0;
    *outlen = 0;
 
    //ensure that in and out are disjunct - otherwise copy in
    if (((out >= in) && (in + inlen > out)) || ((out < in) && (out + *outlen > in)))
      {
        UINT8*tmpIn = new UINT8[inlen];
        memcpy(tmpIn, in, inlen);
        EVP_EncodeUpdate(pCTX, out, (int*) outlen, tmpIn, (int) inlen);
        delete[] tmpIn;
        tmpIn = NULL;
      }
    else
      {
        EVP_EncodeUpdate(pCTX, out, (int*) outlen, (unsigned char*) in, (int) inlen);
      }
    EVP_EncodeFinal(pCTX, out + (*outlen), (int*) &len);
    (*outlen) += len;
#if OPENSSL_VERSION_NUMBER > 0x100020cfL
    EVP_ENCODE_CTX_free(pCTX);
#else
    delete pCTX;
#endif
    return E_SUCCESS;
  }