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    00001 /*
    00002  * The Apache Software License, Version 1.1
    00003  *
    00004  * Copyright (c) 2001 The Apache Software Foundation.  All rights
    00005  * reserved.
    00006  *
    00007  * Redistribution and use in source and binary forms, with or without
    00008  * modification, are permitted provided that the following conditions
    00009  * are met:
    00010  *
    00011  * 1. Redistributions of source code must retain the above copyright
    00012  *    notice, this list of conditions and the following disclaimer.
    00013  *
    00014  * 2. Redistributions in binary form must reproduce the above copyright
    00015  *    notice, this list of conditions and the following disclaimer in
    00016  *    the documentation and/or other materials provided with the
    00017  *    distribution.
    00018  *
    00019  * 3. The end-user documentation included with the redistribution,
    00020  *    if any, must include the following acknowledgment:
    00021  *       "This product includes software developed by the
    00022  *        Apache Software Foundation (http://www.apache.org/)."
    00023  *    Alternately, this acknowledgment may appear in the software itself,
    00024  *    if and wherever such third-party acknowledgments normally appear.
    00025  *
    00026  * 4. The names "Xerces" and "Apache Software Foundation" must
    00027  *    not be used to endorse or promote products derived from this
    00028  *    software without prior written permission. For written
    00029  *    permission, please contact apache\@apache.org.
    00030  *
    00031  * 5. Products derived from this software may not be called "Apache",
    00032  *    nor may "Apache" appear in their name, without prior written
    00033  *    permission of the Apache Software Foundation.
    00034  *
    00035  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
    00036  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    00037  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    00038  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
    00039  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    00040  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    00041  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
    00042  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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    00044  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
    00045  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    00046  * SUCH DAMAGE.
    00047  * ====================================================================
    00048  *
    00049  * This software consists of voluntary contributions made by many
    00050  * individuals on behalf of the Apache Software Foundation, and was
    00051  * originally based on software copyright (c) 2001, International
    00052  * Business Machines, Inc., http://www.ibm.com .  For more information
    00053  * on the Apache Software Foundation, please see
    00054  * <http://www.apache.org/>.
    00055  */
    00056
    00057 /*
    00058  * $Id: Base64.hpp,v 1.5 2003/02/05 18:50:56 tng Exp $
    00059  */
    00060
    00061 #ifndef BASE64_HPP
    00062 #define BASE64_HPP
    00063
    00064 #include <xercesc/util/XercesDefs.hpp>
    00065 #include <xercesc/util/XMLUniDefs.hpp>
    00066
    00067 XERCES_CPP_NAMESPACE_BEGIN
    00068
    00069 //
    00070 // This class provides encode/decode for RFC 2045 Base64 as
    00071 // defined by RFC 2045, N. Freed and N. Borenstein.
    00072 // RFC 2045: Multipurpose Internet Mail Extensions (MIME)
    00073 // Part One: Format of Internet Message Bodies. Reference
    00074 // 1996 Available at: http://www.ietf.org/rfc/rfc2045.txt
    00075 // This class is used by XML Schema binary format validation
    00076 //
    00077 //
    00078 class  Base64
    00079 {
    00080 public :
    00081
    00083
    00098     static XMLByte* encode(const XMLByte* const inputData,
    00099                            const unsigned int   inputLength,
    00100                            unsigned int*        outputLength);
    00101
    00115     static XMLByte* decode(const XMLByte* const inputData,
    00116                            unsigned int*        outputLength);
    00117
    00131     static XMLCh* decode(const XMLCh* const inputData,
    00132                          unsigned int*      outputLength);
    00133
    00144     static int getDataLength(const XMLCh* const inputData );
    00145
    00147
    00148 private :
    00149
    00150     // -----------------------------------------------------------------------
    00151     //  Helper methods
    00152     // -----------------------------------------------------------------------
    00153
    00154     static void init();
    00155
    00156     static bool isData(const XMLByte& octet);
    00157     static bool isPad(const XMLByte& octet);
    00158
    00159     static XMLByte set1stOctet(const XMLByte&, const XMLByte&);
    00160     static XMLByte set2ndOctet(const XMLByte&, const XMLByte&);
    00161     static XMLByte set3rdOctet(const XMLByte&, const XMLByte&);
    00162
    00163     static void split1stOctet(const XMLByte&, XMLByte&, XMLByte&);
    00164     static void split2ndOctet(const XMLByte&, XMLByte&, XMLByte&);
    00165     static void split3rdOctet(const XMLByte&, XMLByte&, XMLByte&);
    00166
    00167     // -----------------------------------------------------------------------
    00168     //  Unimplemented constructors and operators
    00169     // -----------------------------------------------------------------------
    00170     Base64();
    00171     Base64(const Base64&);
    00172
    00173     // -----------------------------------------------------------------------
    00174     //  Private data members
    00175     //
    00176     //  base64Alphabet
    00177     //     The Base64 alphabet (see RFC 2045).
    00178     //
    00179     //  base64Padding
    00180     //     Padding character (see RFC 2045).
    00181     //
    00182     //  base64Inverse
    00183     //     Table used in decoding base64.
    00184     //
    00185     //  isInitialized
    00186     //     Set once base64Inverse is initalized.
    00187     //
    00188     //  quadsPerLine
    00189     //     Number of quadruplets per one line. The encoded output
    00190     //     stream must be represented in lines of no more
    00191     //     than 19 quadruplets each.
    00192     //
    00193     // -----------------------------------------------------------------------
    00194
    00195     static const XMLByte  base64Alphabet[];
    00196     static const XMLByte  base64Padding;
    00197
    00198     static XMLByte  base64Inverse[];
    00199     static bool  isInitialized;
    00200
    00201     static const unsigned int  quadsPerLine;
    00202 };
    00203
    00204 // -----------------------------------------------------------------------
    00205 //  Helper methods
    00206 // -----------------------------------------------------------------------
    00207 inline bool Base64::isPad(const XMLByte& octet)
    00208 {
    00209     return ( octet == base64Padding );
    00210 }
    00211
    00212 inline XMLByte Base64::set1stOctet(const XMLByte& b1, const XMLByte& b2)
    00213 {
    00214     return (( b1 << 2 ) | ( b2 >> 4 ));
    00215 }
    00216
    00217 inline XMLByte Base64::set2ndOctet(const XMLByte& b2, const XMLByte& b3)
    00218 {
    00219     return (( b2 << 4 ) | ( b3 >> 2 ));
    00220 }
    00221
    00222 inline XMLByte Base64::set3rdOctet(const XMLByte& b3, const XMLByte& b4)
    00223 {
    00224     return (( b3 << 6 ) | b4 );
    00225 }
    00226
    00227 inline void Base64::split1stOctet(const XMLByte& ch, XMLByte& b1, XMLByte& b2) {
    00228     b1 = ch >> 2;
    00229     b2 = ( ch & 0x3 ) << 4;
    00230 }
    00231
    00232 inline void Base64::split2ndOctet(const XMLByte& ch, XMLByte& b2, XMLByte& b3) {
    00233     b2 |= ch >> 4;  // combine with previous value
    00234     b3 = ( ch & 0xf ) << 2;
    00235 }
    00236
    00237 inline void Base64::split3rdOctet(const XMLByte& ch, XMLByte& b3, XMLByte& b4) {
    00238     b3 |= ch >> 6;  // combine with previous value
    00239     b4 = ( ch & 0x3f );
    00240 }
    00241
    00242 XERCES_CPP_NAMESPACE_END
    00243
    00244 #endif

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