/* This is taken from kdmcodec.h from kdelibs/kdecore in KDE 2.2 ------------------------------------------------------------- Copyright (C) 2000-2001 Dawit Alemayehu Copyright (C) 2001 Rik Hemsley (rikkus) This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (LGPL) as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. This KMD5 class is based upon a C++ implementation of "RSA Data Security, Inc. MD5 Message-Digest Algorithm" by Mordechai T. Abzug, Copyright (c) 1995. This implementation passes the test-suite supplied with RFC 1321. RFC 1321 "MD5 Message-Digest Algorithm" Copyright (C) 1991-1992, RSA Data Security, Inc. Created 1991. All rights reserved. The encoding and decoding utilities in KBiffCodecs with the exception of quoted-printable were ported from the HTTPClient java package by Ronald Tschalär Copyright (C) 1996-1999. The quoted-printable codec as described in RFC 2045, section 6.7. is by Rik Hemsley (C) 2001. */ #include #include "kbiffcodec.h" class CodecPrivate { public: static char Base64EncMap[64]; static char Base64DecMap[128]; static void base64Encode( const QByteArray& in, QByteArray& out) { bool insertLFs(false); // clear out the output buffer out.resize( 0 ); if ( in.isEmpty() ) return; unsigned int sidx = 0, didx = 0; const char* buf = in.data(); const unsigned int len = in.size(); unsigned int out_len = ((len+2)/3)*4; // Deal with the 76 characters or less per // line limit specified in RFC 2045 on a // pre request basis. insertLFs = (insertLFs && out_len > 76); if ( insertLFs ) out_len += (out_len/76); int count = 0; out.resize( out_len ); // 3-byte to 4-byte conversion + 0-63 to ascii printable conversion if ( len > 1 ) { while (sidx < len-2) { if ( insertLFs ) { if ( count && (count%76) == 0 ) out[didx++] = '\n'; count += 4; } out[didx++] = Base64EncMap[(buf[sidx] >> 2) & 077]; out[didx++] = Base64EncMap[((buf[sidx+1] >> 4) & 017) | ((buf[sidx] << 4) & 077)]; out[didx++] = Base64EncMap[((buf[sidx+2] >> 6) & 003) | ((buf[sidx+1] << 2) & 077)]; out[didx++] = Base64EncMap[buf[sidx+2] & 077]; sidx += 3; } } if (sidx < len) { out[didx++] = Base64EncMap[(buf[sidx] >> 2) & 077]; if (sidx < len-1) { out[didx++] = Base64EncMap[((buf[sidx+1] >> 4) & 017) | ((buf[sidx] << 4) & 077)]; out[didx++] = Base64EncMap[(buf[sidx+1] << 2) & 077]; } else { out[didx++] = Base64EncMap[(buf[sidx] << 4) & 077]; } } // Add padding while (didx < out.size()) { out[didx] = '='; didx++; } } static void base64Decode( const QByteArray& in, QByteArray& out ) { out.resize(0); if ( in.isEmpty() ) return; unsigned int count = 0; unsigned int len = in.size(), tail = len; const char* in_buf = in.data(); // Deal with possible *nix "BEGIN" marker!! while ( count < len && (in_buf[count] == '\n' || in_buf[count] == '\r' || in_buf[count] == '\t' || in_buf[count] == ' ') ) count++; if ( strncasecmp(in_buf, "begin", 5) == 0 ) { count += 5; while ( count < len && in_buf[count] != '\n' && in_buf[count] != '\r' ) count++; in_buf += (++count); tail = (len -= count); } // Find the tail end of the actual encoded data even if // there is/are trailing CR and/or LF. while ( in_buf[tail-1] == '=' || in_buf[tail-1] == '\n' || in_buf[tail-1] == '\r' ) if ( in_buf[--tail] != '=' ) len = tail; unsigned int outIdx = 0; out.resize( (count=len) ); for (unsigned int idx = 0; idx < count; idx++) { // Adhere to RFC 2045 and ignore characters // that are not part of the encoding table. char ch = in_buf[idx]; if ((ch > 47 && ch < 58) || (ch > 64 && ch < 91) || (ch > 96 && ch < 123) || ch == '+' || ch == '/' || ch == '=') { out[outIdx++] = Base64DecMap[(int)ch]; } else { len--; tail--; } } // 4-byte to 3-byte conversion len = (tail>(len/4)) ? tail-(len/4) : 0; unsigned int sidx = 0, didx = 0; if ( len > 1 ) { while (didx < len-2) { out[didx] = (((out[sidx] << 2) & 255) | ((out[sidx+1] >> 4) & 003)); out[didx+1] = (((out[sidx+1] << 4) & 255) | ((out[sidx+2] >> 2) & 017)); out[didx+2] = (((out[sidx+2] << 6) & 255) | (out[sidx+3] & 077)); sidx += 4; didx += 3; } } if (didx < len) out[didx] = (((out[sidx] << 2) & 255) | ((out[sidx+1] >> 4) & 003)); if (++didx < len ) out[didx] = (((out[sidx+1] << 4) & 255) | ((out[sidx+2] >> 2) & 017)); // Resize the output buffer if ( len == 0 || len < out.size() ) out.resize(len); } }; // static constants for base64 char CodecPrivate::Base64EncMap[64] = { 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x2B, 0x2F }; char CodecPrivate::Base64DecMap[128] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3E, 0x00, 0x00, 0x00, 0x3F, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00 }; /***************************************************************************/ QString KBiffCodecs::base64Encode( const QString& str ) { if ( str.isEmpty() ) return QString::fromLatin1(""); QByteArray in, out; const unsigned int len = str.length(); in.resize( len ); memcpy( in.data(), str.latin1(), len ); CodecPrivate::base64Encode( in, out ); return QString( out ); } QString KBiffCodecs::base64Decode( const QString& str ) { if ( str.isEmpty() ) return QString::fromLatin1(""); QByteArray in, out; const unsigned int len = str.length(); in.resize( str.length() ); memcpy( in.data(), str.latin1(), len ); CodecPrivate::base64Decode( in, out ); return QString( out ); }