Base64.cxx
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上传日期:2013-07-25
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- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. 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.
- *
- * 3. The names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const Base64_cxx_Version =
- "$Id: Base64.cxx,v 1.6 2001/04/03 07:51:08 icahoon Exp $";
- #include <string.h>
- #include "Base64.hxx"
- using Vocal::Base64;
- char Base64::basis_64[] =
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
- char Base64::index_64[128] =
- {
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
- 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
- -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
- 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
- -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
- 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1
- };
- Base64::Base64()
- {
- }
- Base64::~Base64()
- {
- }
- #define char64(c) (((c) > 127) ? -1 : index_64[(c)])
- int Base64::encode(unsigned char* outputBuf, unsigned int* outputLen,
- unsigned char* inputBuf, unsigned int inputLen)
- {
- unsigned char c1, c2, c3;
- unsigned char *pOutputBuf = outputBuf;
- unsigned int count = 0, charsPerLine = 0;
- // Need to initialize c1,c2,c3 to 0 to ensure correct operation
- // in case of a message one byte long
- c1 = 0x00;
- c2 = 0x00;
- c3 = 0x00;
- while (count < inputLen)
- {
- c1 = inputBuf[count++];
- if (count == inputLen)
- {
- c2 = 0x00;
- *pOutputBuf++ = basis_64[c1 >> 2];
- *pOutputBuf++ = basis_64[(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4))];
- *pOutputBuf++ = '=';
- *pOutputBuf++ = '=';
- }
- else // count < inputLen
- {
- c2 = inputBuf[count++];
- if (count == inputLen)
- {
- c3 = 0x00;
- *pOutputBuf++ = basis_64[c1 >> 2];
- *pOutputBuf++ = basis_64[(((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4))];
- *pOutputBuf++ = basis_64[(((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6))];
- *pOutputBuf++ = '=';
- }
- else // count < inputLen
- {
- c3 = inputBuf[count++];
- *pOutputBuf++ = basis_64[c1 >> 2];
- *pOutputBuf++ = basis_64[(((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4))];
- *pOutputBuf++ = basis_64[(((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6))];
- *pOutputBuf++ = basis_64[(c3 & 0x3F)];
- }
- }
- charsPerLine += 4;
- } //end while
- *pOutputBuf++ = ' ';
- *outputLen = strlen((char*)outputBuf);
- return *outputLen;
- }
- int Base64::decode(unsigned char* outputBuf, unsigned int* outputLen,
- unsigned char* inputBuf, unsigned int inputLen)
- {
- unsigned char c1, c2, c3, c4;
- unsigned int count = 0;
- c1 = *inputBuf++;
- while (c1 != ' ')
- {
- c2 = *inputBuf++;
- c3 = *inputBuf++;
- c4 = *inputBuf++;
- c1 = char64(c1);
- c2 = char64(c2);
- outputBuf[count++] = ((c1 << 2) | ((c2 & 0x30) >> 4));
- if (c3 != '=')
- {
- c3 = char64(c3);
- outputBuf[count++] = (((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
- if (c4 != '=')
- {
- c4 = char64(c4);
- outputBuf[count++] = (((c3 & 0x03) << 6) | c4);
- }
- }
- c1 = *inputBuf++;
- if (c1 == 'r')
- {
- c1 = *inputBuf++;
- if (c1 == 'n')
- c1 = *inputBuf++;
- }
- }// while c1 != 0
- *outputLen = count;
- return count;
- }