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902 lines
27 KiB
902 lines
27 KiB
//=============================================================================
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// File: dw_cte.cpp
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// Contents: Function definitions for content transfer encodings
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// Maintainer: Doug Sauder <dwsauder@fwb.gulf.net>
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// WWW: http://www.fwb.gulf.net/~dwsauder/mimepp.html
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//
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// Copyright (c) 1996, 1997 Douglas W. Sauder
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// All rights reserved.
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//
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// IN NO EVENT SHALL DOUGLAS W. SAUDER BE LIABLE TO ANY PARTY FOR DIRECT,
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// INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
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// THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF DOUGLAS W. SAUDER
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// HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// DOUGLAS W. SAUDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT
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// NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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// PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
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// BASIS, AND DOUGLAS W. SAUDER HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
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// SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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//
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//=============================================================================
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#define DW_IMPLEMENTATION
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#include <mimelib/config.h>
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#include <mimelib/debug.h>
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#include <string.h>
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#include <mimelib/string.h>
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#include <mimelib/utility.h>
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#define MAXLINE 76
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static size_t calc_crlf_buff_size(const char* srcBuf, size_t srcLen);
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static int to_crlf(const char* srcBuf, size_t srcLen, char* destBuf,
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size_t destSize, size_t* destLen);
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static int to_lf(const char* srcBuf, size_t srcLen, char* destBuf,
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size_t destSize, size_t* destLen);
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static int to_cr(const char* srcBuf, size_t srcLen, char* destBuf,
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size_t destSize, size_t* destLen);
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static int encode_base64(const char* aIn, size_t aInLen, char* aOut,
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size_t aOutSize, size_t* aOutLen);
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static int decode_base64(const char* aIn, size_t aInLen, char* aOut,
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size_t aOutSize, size_t* aOutLen);
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static int encode_qp(const char* aIn, size_t aInLen, char* aOut,
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size_t aOutSize, size_t* aOutLen);
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static int decode_qp(const char* aIn, size_t aInLen, char* aOut,
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size_t aOutSize, size_t* aOutLen);
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static size_t calc_qp_buff_size(const char* aIn, size_t aInLen);
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int DwToCrLfEol(const DwString& aSrcStr, DwString& aDestStr)
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{
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// Estimate required destination buffer size
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size_t srcLen = aSrcStr.length();
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const char* srcBuf = aSrcStr.data();
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size_t destSize = calc_crlf_buff_size(srcBuf, srcLen);
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// Allocate destination buffer
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DwString destStr(destSize, (char)0);
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char* destBuf = (char*) destStr.data();
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// Encode source to destination
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size_t destLen = 0;
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to_crlf(srcBuf, srcLen, destBuf, destSize, &destLen);
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aDestStr.assign(destStr, 0, destLen);
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return 0;
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}
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int DwToLfEol(const DwString& aSrcStr, DwString& aDestStr)
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{
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size_t srcLen = aSrcStr.length();
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const char* srcBuf = aSrcStr.data();
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size_t destSize = srcLen;
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// Allocate destination buffer
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DwString destStr(destSize, (char)0);
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char* destBuf = (char*) destStr.data();
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// Encode source to destination
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size_t destLen = 0;
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to_lf(srcBuf, srcLen, destBuf, destSize, &destLen);
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aDestStr.assign(destStr, 0, destLen);
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return 0;
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}
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int DwToCrEol(const DwString& aSrcStr, DwString& aDestStr)
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{
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size_t srcLen = aSrcStr.length();
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const char* srcBuf = aSrcStr.data();
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size_t destSize = srcLen;
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// Allocate destination buffer
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DwString destStr(destSize, (char)0);
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char* destBuf = (char*) destStr.data();
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// Encode source to destination
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size_t destLen = 0;
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to_cr(srcBuf, srcLen, destBuf, destSize, &destLen);
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aDestStr.assign(destStr, 0, destLen);
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return 0;
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}
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int DwToLocalEol(const DwString& aSrcStr, DwString& aDestStr)
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{
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#if defined(DW_EOL_CRLF)
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return DwToCrLfEol(aSrcStr, aDestStr);
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#elif defined(DW_EOL_LF)
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return DwToLfEol(aSrcStr, aDestStr);
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#else
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# error "Must define DW_EOL_CRLF, DW_EOL_LF"
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#endif
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}
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int DwEncodeBase64(const DwString& aSrcStr, DwString& aDestStr)
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{
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// Estimate required destination buffer size
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size_t srcLen = aSrcStr.length();
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const char* srcBuf = aSrcStr.data();
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size_t destSize = (srcLen+2)/3*4;
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destSize += strlen(DW_EOL)*destSize/72 + 2;
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destSize += 64; // a little extra room
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// Allocate destination buffer
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DwString destStr(destSize, (char)0);
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char* destBuf = (char*) destStr.data();
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// Encode source to destination
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size_t destLen = 0;
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int result =
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encode_base64(srcBuf, srcLen, destBuf, destSize, &destLen);
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aDestStr.assign(destStr, 0, destLen);
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return result;
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}
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int DwDecodeBase64(const DwString& aSrcStr, DwString& aDestStr)
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{
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// Set destination buffer size same as source buffer size
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size_t srcLen = aSrcStr.length();
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const char* srcBuf = aSrcStr.data();
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size_t destSize = srcLen;
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// Allocate destination buffer
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DwString destStr(destSize, (char)0);
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char* destBuf = (char*) destStr.data();
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// Encode source to destination
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size_t destLen = 0;
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int result =
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decode_base64(srcBuf, srcLen, destBuf, destSize, &destLen);
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aDestStr.assign(destStr, 0, destLen);
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return result;
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}
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int DwEncodeQuotedPrintable(const DwString& aSrcStr, DwString& aDestStr)
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{
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// Estimate required destination buffer size
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size_t srcLen = aSrcStr.length();
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const char* srcBuf = aSrcStr.data();
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size_t destSize = calc_qp_buff_size(srcBuf, srcLen);
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destSize += 64; // a little extra room
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// Allocate destination buffer
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DwString destStr(destSize, (char)0);
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char* destBuf = (char*) destStr.data();
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// Encode source to destination
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size_t destLen = 0;
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int result =
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encode_qp(srcBuf, srcLen, destBuf, destSize, &destLen);
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aDestStr.assign(destStr, 0, destLen);
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return result;
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}
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int DwDecodeQuotedPrintable(const DwString& aSrcStr, DwString& aDestStr)
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{
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// Set destination buffer size same as source buffer size
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size_t srcLen = aSrcStr.length();
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const char* srcBuf = aSrcStr.data();
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size_t destSize = srcLen;
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// Allocate destination buffer
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DwString destStr(destSize, (char)0);
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char* destBuf = (char*) destStr.data();
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// Encode source to destination
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size_t destLen = 0;
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int result =
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decode_qp(srcBuf, srcLen, destBuf, destSize, &destLen);
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aDestStr.assign(destStr, 0, destLen);
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return result;
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}
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//============================================================================
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// Everything below this line is private to this file (static)
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//============================================================================
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static size_t calc_crlf_buff_size(const char* srcBuf, size_t srcLen)
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{
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size_t i, extra;
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if (!srcBuf) return 0;
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extra = 0;
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for (i=0; i < srcLen; ) {
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switch (srcBuf[i]) {
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/* Bare LF (UNIX or C text) */
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case '\n':
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++extra;
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++i;
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break;
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case '\r':
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/* CR LF (DOS, Windows, or MIME text) */
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if (i+1 < srcLen && srcBuf[i+1] == '\n') {
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i += 2;
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}
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/* Bare CR (Macintosh text) */
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else {
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++extra;
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++i;
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}
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break;
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default:
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++i;
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}
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}
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return srcLen + extra;
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}
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static int to_crlf(const char* srcBuf, size_t srcLen, char* destBuf,
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size_t destSize, size_t* destLen)
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{
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size_t iSrc, iDest;
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if (!srcBuf || !destBuf || !destLen) return -1;
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iSrc = iDest = 0;
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while (iSrc < srcLen && iDest < destSize) {
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switch (srcBuf[iSrc]) {
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/* Bare LF (UNIX or C text) */
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case '\n':
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destBuf[iDest++] = '\r';
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if (iDest < destSize) {
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destBuf[iDest++] = srcBuf[iSrc++];
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}
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break;
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case '\r':
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/* CR LF (DOS, Windows, or MIME text) */
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if (iSrc+1 < srcLen && srcBuf[iSrc+1] == '\n') {
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destBuf[iDest++] = srcBuf[iSrc++];
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if (iDest < destSize) {
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destBuf[iDest++] = srcBuf[iSrc++];
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}
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}
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/* Bare CR (Macintosh text) */
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else {
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destBuf[iDest++] = srcBuf[iSrc++];
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if (iDest < destSize) {
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destBuf[iDest++] = '\n';
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}
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}
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break;
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default:
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destBuf[iDest++] = srcBuf[iSrc++];
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}
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}
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*destLen = iDest;
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if (iDest < destSize) {
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destBuf[iDest] = 0;
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}
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return 0;
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}
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static int to_lf(const char* srcBuf, size_t srcLen, char* destBuf,
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size_t destSize, size_t* destLen)
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{
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size_t iSrc, iDest;
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if (!srcBuf || !destBuf || !destLen) return -1;
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iSrc = iDest = 0;
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while (iSrc < srcLen && iDest < destSize) {
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switch (srcBuf[iSrc]) {
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/* Bare LF (UNIX or C text) */
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case '\n':
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destBuf[iDest++] = srcBuf[iSrc++];
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break;
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case '\r':
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/* CR LF (DOS, Windows, or MIME text) */
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if (iSrc+1 < srcLen && srcBuf[iSrc+1] == '\n') {
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++iSrc;
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destBuf[iDest++] = srcBuf[iSrc++];
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}
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/* Bare CR (Macintosh text) */
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else {
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destBuf[iDest++] = '\n';
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++iSrc;
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}
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break;
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default:
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destBuf[iDest++] = srcBuf[iSrc++];
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}
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}
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*destLen = iDest;
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if (iDest < destSize) {
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destBuf[iDest] = 0;
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}
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return 0;
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}
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static int to_cr(const char* srcBuf, size_t srcLen, char* destBuf,
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size_t destSize, size_t* destLen)
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{
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size_t iSrc, iDest;
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if (!srcBuf || !destBuf || !destLen) return -1;
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iSrc = iDest = 0;
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while (iSrc < srcLen && iDest < destSize) {
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switch (srcBuf[iSrc]) {
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/* Bare LF (UNIX or C text) */
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case '\n':
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destBuf[iDest++] = '\r';
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++iSrc;
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break;
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case '\r':
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/* CR LF (DOS, Windows, or MIME text) */
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if (iSrc+1 < srcLen && srcBuf[iSrc+1] == '\n') {
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destBuf[iDest++] = srcBuf[iSrc++];
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++iSrc;
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}
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/* Bare CR (Macintosh text) */
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else {
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destBuf[iDest++] = srcBuf[iSrc++];
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}
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break;
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default:
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destBuf[iDest++] = srcBuf[iSrc++];
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}
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}
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*destLen = iDest;
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if (iDest < destSize) {
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destBuf[iDest] = 0;
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}
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return 0;
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}
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static char base64tab[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz0123456789+/";
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static char base64idx[128] = {
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'\377','\377','\377','\377','\377','\377','\377','\377',
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'\377','\377','\377','\377','\377','\377','\377','\377',
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'\377','\377','\377','\377','\377','\377','\377','\377',
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'\377','\377','\377','\377','\377','\377','\377','\377',
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'\377','\377','\377','\377','\377','\377','\377','\377',
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'\377','\377','\377', 62,'\377','\377','\377', 63,
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52, 53, 54, 55, 56, 57, 58, 59,
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60, 61,'\377','\377','\377','\377','\377','\377',
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'\377', 0, 1, 2, 3, 4, 5, 6,
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7, 8, 9, 10, 11, 12, 13, 14,
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15, 16, 17, 18, 19, 20, 21, 22,
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23, 24, 25,'\377','\377','\377','\377','\377',
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'\377', 26, 27, 28, 29, 30, 31, 32,
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33, 34, 35, 36, 37, 38, 39, 40,
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41, 42, 43, 44, 45, 46, 47, 48,
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49, 50, 51,'\377','\377','\377','\377','\377'
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};
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static char hextab[] = "0123456789ABCDEF";
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#ifdef __cplusplus
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inline int isbase64(int a) {
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return ('A' <= a && a <= 'Z')
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|| ('a' <= a && a <= 'z')
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|| ('0' <= a && a <= '9')
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|| a == '+' || a == '/';
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}
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#else
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#define isbase64(a) ( ('A' <= (a) && (a) <= 'Z') \
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|| ('a' <= (a) && (a) <= 'z') \
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|| ('0' <= (a) && (a) <= '9') \
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|| (a) == '+' || (a) == '/' )
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#endif
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static int encode_base64(const char* aIn, size_t aInLen, char* aOut,
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size_t aOutSize, size_t* aOutLen)
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{
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if (!aIn || !aOut || !aOutLen)
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return -1;
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size_t inLen = aInLen;
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char* out = aOut;
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size_t outSize = (inLen+2)/3*4; /* 3:4 conversion ratio */
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outSize += strlen(DW_EOL)*outSize/MAXLINE + 2; /* Space for newlines and NUL */
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if (aOutSize < outSize)
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return -1;
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size_t inPos = 0;
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size_t outPos = 0;
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int c1, c2, c3;
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int lineLen = 0;
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/* Get three characters at a time and encode them. */
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for (size_t i=0; i < inLen/3; ++i) {
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c1 = aIn[inPos++] & 0xFF;
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c2 = aIn[inPos++] & 0xFF;
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c3 = aIn[inPos++] & 0xFF;
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out[outPos++] = base64tab[(c1 & 0xFC) >> 2];
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out[outPos++] = base64tab[((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4)];
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out[outPos++] = base64tab[((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6)];
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out[outPos++] = base64tab[c3 & 0x3F];
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lineLen += 4;
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if (lineLen >= MAXLINE-3) {
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const char* cp = DW_EOL;
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out[outPos++] = *cp++;
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if (*cp) {
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out[outPos++] = *cp;
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}
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lineLen = 0;
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}
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}
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/* Encode the remaining one or two characters. */
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const char* cp;
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switch (inLen % 3) {
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case 0:
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cp = DW_EOL;
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out[outPos++] = *cp++;
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if (*cp) {
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out[outPos++] = *cp;
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}
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break;
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case 1:
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c1 = aIn[inPos] & 0xFF;
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out[outPos++] = base64tab[(c1 & 0xFC) >> 2];
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out[outPos++] = base64tab[((c1 & 0x03) << 4)];
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out[outPos++] = '=';
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out[outPos++] = '=';
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cp = DW_EOL;
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out[outPos++] = *cp++;
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if (*cp) {
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out[outPos++] = *cp;
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}
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break;
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case 2:
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c1 = aIn[inPos++] & 0xFF;
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c2 = aIn[inPos] & 0xFF;
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out[outPos++] = base64tab[(c1 & 0xFC) >> 2];
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out[outPos++] = base64tab[((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4)];
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out[outPos++] = base64tab[((c2 & 0x0F) << 2)];
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out[outPos++] = '=';
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cp = DW_EOL;
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out[outPos++] = *cp++;
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if (*cp) {
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out[outPos++] = *cp;
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}
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break;
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}
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out[outPos] = 0;
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*aOutLen = outPos;
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return 0;
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}
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static int decode_base64(const char* aIn, size_t aInLen, char* aOut,
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size_t aOutSize, size_t* aOutLen)
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{
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if (!aIn || !aOut || !aOutLen)
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return -1;
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size_t inLen = aInLen;
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char* out = aOut;
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size_t outSize = ( ( inLen + 3 ) / 4 ) * 3;
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if (aOutSize < outSize)
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return -1;
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/* Get four input chars at a time and decode them. Ignore white space
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* chars (CR, LF, SP, HT). If '=' is encountered, terminate input. If
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* a char other than white space, base64 char, or '=' is encountered,
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* flag an input error, but otherwise ignore the char.
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*/
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|
int isErr = 0;
|
|
int isEndSeen = 0;
|
|
int b1, b2, b3;
|
|
int a1, a2, a3, a4;
|
|
size_t inPos = 0;
|
|
size_t outPos = 0;
|
|
while (inPos < inLen) {
|
|
a1 = a2 = a3 = a4 = 0;
|
|
while (inPos < inLen) {
|
|
a1 = aIn[inPos++] & 0xFF;
|
|
if (isbase64(a1)) {
|
|
break;
|
|
}
|
|
else if (a1 == '=') {
|
|
isEndSeen = 1;
|
|
break;
|
|
}
|
|
else if (a1 != '\r' && a1 != '\n' && a1 != ' ' && a1 != '\t') {
|
|
isErr = 1;
|
|
}
|
|
}
|
|
while (inPos < inLen) {
|
|
a2 = aIn[inPos++] & 0xFF;
|
|
if (isbase64(a2)) {
|
|
break;
|
|
}
|
|
else if (a2 == '=') {
|
|
isEndSeen = 1;
|
|
break;
|
|
}
|
|
else if (a2 != '\r' && a2 != '\n' && a2 != ' ' && a2 != '\t') {
|
|
isErr = 1;
|
|
}
|
|
}
|
|
while (inPos < inLen) {
|
|
a3 = aIn[inPos++] & 0xFF;
|
|
if (isbase64(a3)) {
|
|
break;
|
|
}
|
|
else if (a3 == '=') {
|
|
isEndSeen = 1;
|
|
break;
|
|
}
|
|
else if (a3 != '\r' && a3 != '\n' && a3 != ' ' && a3 != '\t') {
|
|
isErr = 1;
|
|
}
|
|
}
|
|
while (inPos < inLen) {
|
|
a4 = aIn[inPos++] & 0xFF;
|
|
if (isbase64(a4)) {
|
|
break;
|
|
}
|
|
else if (a4 == '=') {
|
|
isEndSeen = 1;
|
|
break;
|
|
}
|
|
else if (a4 != '\r' && a4 != '\n' && a4 != ' ' && a4 != '\t') {
|
|
isErr = 1;
|
|
}
|
|
}
|
|
if (isbase64(a1) && isbase64(a2) && isbase64(a3) && isbase64(a4)) {
|
|
a1 = base64idx[a1] & 0xFF;
|
|
a2 = base64idx[a2] & 0xFF;
|
|
a3 = base64idx[a3] & 0xFF;
|
|
a4 = base64idx[a4] & 0xFF;
|
|
b1 = ((a1 << 2) & 0xFC) | ((a2 >> 4) & 0x03);
|
|
b2 = ((a2 << 4) & 0xF0) | ((a3 >> 2) & 0x0F);
|
|
b3 = ((a3 << 6) & 0xC0) | ( a4 & 0x3F);
|
|
out[outPos++] = char(b1);
|
|
out[outPos++] = char(b2);
|
|
out[outPos++] = char(b3);
|
|
}
|
|
else if (isbase64(a1) && isbase64(a2) && isbase64(a3) && a4 == '=') {
|
|
a1 = base64idx[a1] & 0xFF;
|
|
a2 = base64idx[a2] & 0xFF;
|
|
a3 = base64idx[a3] & 0xFF;
|
|
b1 = ((a1 << 2) & 0xFC) | ((a2 >> 4) & 0x03);
|
|
b2 = ((a2 << 4) & 0xF0) | ((a3 >> 2) & 0x0F);
|
|
out[outPos++] = char(b1);
|
|
out[outPos++] = char(b2);
|
|
break;
|
|
}
|
|
else if (isbase64(a1) && isbase64(a2) && a3 == '=' && a4 == '=') {
|
|
a1 = base64idx[a1] & 0xFF;
|
|
a2 = base64idx[a2] & 0xFF;
|
|
b1 = ((a1 << 2) & 0xFC) | ((a2 >> 4) & 0x03);
|
|
out[outPos++] = char(b1);
|
|
break;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
if (isEndSeen) {
|
|
break;
|
|
}
|
|
} /* end while loop */
|
|
*aOutLen = outPos;
|
|
return (isErr) ? -1 : 0;
|
|
}
|
|
|
|
|
|
/***** Warning: calc_qp_buff_size must stay in sync with encode_qp ******/
|
|
|
|
static int encode_qp(const char* aIn, size_t aInLen, char* aOut,
|
|
size_t /*aOutSize */, size_t* aOutLen)
|
|
{
|
|
size_t inPos, outPos, lineLen;
|
|
int ch;
|
|
|
|
if (!aIn || !aOut || !aOutLen) {
|
|
return -1;
|
|
}
|
|
inPos = 0;
|
|
outPos = 0;
|
|
lineLen = 0;
|
|
while (inPos < aInLen) {
|
|
ch = aIn[inPos++] & 0xFF;
|
|
/* '.' at beginning of line (confuses some SMTPs) */
|
|
if (lineLen == 0 && ch == '.') {
|
|
aOut[outPos++] = '=';
|
|
aOut[outPos++] = hextab[(ch >> 4) & 0x0F];
|
|
aOut[outPos++] = hextab[ch & 0x0F];
|
|
lineLen += 3;
|
|
}
|
|
/* "From " at beginning of line (gets mangled in mbox folders) */
|
|
else if (lineLen == 0 && inPos+3 < aInLen && ch == 'F'
|
|
&& aIn[inPos ] == 'r' && aIn[inPos+1] == 'o'
|
|
&& aIn[inPos+2] == 'm' && aIn[inPos+3] == ' ') {
|
|
aOut[outPos++] = '=';
|
|
aOut[outPos++] = hextab[(ch >> 4) & 0x0F];
|
|
aOut[outPos++] = hextab[ch & 0x0F];
|
|
lineLen += 3;
|
|
}
|
|
/* Normal printable char */
|
|
else if ((62 <= ch && ch <= 126) || (33 <= ch && ch <= 60)) {
|
|
aOut[outPos++] = (char) ch;
|
|
++lineLen;
|
|
}
|
|
/* Space */
|
|
else if (ch == ' ') {
|
|
/* Space at end of line or end of input must be encoded */
|
|
#if defined(DW_EOL_LF)
|
|
if (inPos >= aInLen /* End of input? */
|
|
|| aIn[inPos] == '\n') { /* End of line? */
|
|
|
|
aOut[outPos++] = '=';
|
|
aOut[outPos++] = '2';
|
|
aOut[outPos++] = '0';
|
|
lineLen += 3;
|
|
}
|
|
#elif defined(DW_EOL_CRLF)
|
|
if (inPos >= aInLen /* End of input? */
|
|
|| (inPos < aInLen-1 /* End of line? */
|
|
&& aIn[inPos ] == '\r'
|
|
&& aIn[inPos+1] == '\n') ) {
|
|
|
|
aOut[outPos++] = '=';
|
|
aOut[outPos++] = '2';
|
|
aOut[outPos++] = '0';
|
|
lineLen += 3;
|
|
}
|
|
#else
|
|
# error Must define DW_EOL_LF or DW_EOL_CRLF
|
|
#endif
|
|
else {
|
|
aOut[outPos++] = ' ';
|
|
++lineLen;
|
|
}
|
|
}
|
|
/* Hard line break */
|
|
#if defined(DW_EOL_LF)
|
|
else if (ch == '\n') {
|
|
aOut[outPos++] = '\n';
|
|
lineLen = 0;
|
|
}
|
|
#elif defined(DW_EOL_CRLF)
|
|
else if (inPos < aInLen && ch == '\r' && aIn[inPos] == '\n') {
|
|
++inPos;
|
|
aOut[outPos++] = '\r';
|
|
aOut[outPos++] = '\n';
|
|
lineLen = 0;
|
|
}
|
|
#endif
|
|
/* Non-printable char */
|
|
else if (ch & 0x80 /* 8-bit char */
|
|
|| !(ch & 0xE0) /* control char */
|
|
|| ch == 0x7F /* DEL */
|
|
|| ch == '=') { /* special case */
|
|
aOut[outPos++] = '=';
|
|
aOut[outPos++] = hextab[(ch >> 4) & 0x0F];
|
|
aOut[outPos++] = hextab[ch & 0x0F];
|
|
lineLen += 3;
|
|
}
|
|
/* Soft line break */
|
|
#if defined(DW_EOL_LF)
|
|
if (lineLen >= MAXLINE-3 && inPos < aInLen && aIn[inPos] != '\n') {
|
|
aOut[outPos++] = '=';
|
|
aOut[outPos++] = '\n';
|
|
lineLen = 0;
|
|
}
|
|
#elif defined(DW_EOL_CRLF)
|
|
if (lineLen >= MAXLINE-3 && !(inPos < aInLen-1 &&
|
|
aIn[inPos] == '\r' && aIn[inPos+1] == '\n')) {
|
|
|
|
aOut[outPos++] = '=';
|
|
aOut[outPos++] = '\r';
|
|
aOut[outPos++] = '\n';
|
|
lineLen = 0;
|
|
}
|
|
#endif
|
|
}
|
|
aOut[outPos] = 0;
|
|
*aOutLen = outPos;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int decode_qp(const char* aIn, size_t aInLen, char* aOut,
|
|
size_t /* aOutSize */, size_t* aOutLen)
|
|
{
|
|
size_t i, inPos, outPos, lineLen, nextLineStart, numChars, charsEnd;
|
|
int isEolFound, softLineBrk, isError;
|
|
int ch, c1, c2;
|
|
|
|
if (!aIn || !aOut || !aOutLen)
|
|
return -1;
|
|
isError = 0;
|
|
inPos = 0;
|
|
outPos = 0;
|
|
for (i=0; i < aInLen; ++i) {
|
|
if (aIn[i] == 0) {
|
|
aInLen = i;
|
|
break;
|
|
}
|
|
}
|
|
if (aInLen == 0) {
|
|
aOut[0] = 0;
|
|
*aOutLen = 0;
|
|
return 0;
|
|
}
|
|
while (inPos < aInLen) {
|
|
/* Get line */
|
|
lineLen = 0;
|
|
isEolFound = 0;
|
|
while (!isEolFound && lineLen < aInLen - inPos) {
|
|
ch = aIn[inPos+lineLen];
|
|
++lineLen;
|
|
if (ch == '\n') {
|
|
isEolFound = 1;
|
|
}
|
|
}
|
|
nextLineStart = inPos + lineLen;
|
|
numChars = lineLen;
|
|
/* Remove white space from end of line */
|
|
while (numChars > 0) {
|
|
ch = aIn[inPos+numChars-1] & 0x7F;
|
|
if (ch != '\n' && ch != '\r' && ch != ' ' && ch != '\t') {
|
|
break;
|
|
}
|
|
--numChars;
|
|
}
|
|
charsEnd = inPos + numChars;
|
|
/* Decode line */
|
|
softLineBrk = 0;
|
|
while (inPos < charsEnd) {
|
|
ch = aIn[inPos++] & 0x7F;
|
|
if (ch != '=') {
|
|
/* Normal printable char */
|
|
aOut[outPos++] = (char) ch;
|
|
}
|
|
else /* if (ch == '=') */ {
|
|
/* Soft line break */
|
|
if (inPos >= charsEnd) {
|
|
softLineBrk = 1;
|
|
break;
|
|
}
|
|
/* Non-printable char */
|
|
else if (inPos < charsEnd-1) {
|
|
c1 = aIn[inPos++] & 0x7F;
|
|
if ('0' <= c1 && c1 <= '9')
|
|
c1 -= '0';
|
|
else if ('A' <= c1 && c1 <= 'F')
|
|
c1 = c1 - 'A' + 10;
|
|
else if ('a' <= c1 && c1 <= 'f')
|
|
c1 = c1 - 'a' + 10;
|
|
else
|
|
isError = 1;
|
|
c2 = aIn[inPos++] & 0x7F;
|
|
if ('0' <= c2 && c2 <= '9')
|
|
c2 -= '0';
|
|
else if ('A' <= c2 && c2 <= 'F')
|
|
c2 = c2 - 'A' + 10;
|
|
else if ('a' <= c2 && c2 <= 'f')
|
|
c2 = c2 - 'a' + 10;
|
|
else
|
|
isError = 1;
|
|
aOut[outPos++] = (char) ((c1 << 4) + c2);
|
|
}
|
|
else /* if (inPos == charsEnd-1) */ {
|
|
isError = 1;
|
|
}
|
|
}
|
|
}
|
|
if (isEolFound && !softLineBrk) {
|
|
const char* cp = DW_EOL;
|
|
aOut[outPos++] = *cp++;
|
|
if (*cp) {
|
|
aOut[outPos++] = *cp;
|
|
}
|
|
}
|
|
inPos = nextLineStart;
|
|
}
|
|
aOut[outPos] = 0;
|
|
*aOutLen = outPos;
|
|
return (isError) ? -1 : 0;
|
|
}
|
|
|
|
|
|
/***** Warning: calc_qp_buff_size must stay in sync with encode_qp ******/
|
|
|
|
static size_t calc_qp_buff_size(const char* aIn, size_t aInLen)
|
|
{
|
|
size_t inPos, outLen, lineLen;
|
|
int ch;
|
|
|
|
if (!aIn || aInLen == 0) {
|
|
return 0;
|
|
}
|
|
inPos = 0;
|
|
outLen = 0;
|
|
lineLen = 0;
|
|
while (inPos < aInLen) {
|
|
ch = aIn[inPos++] & 0xFF;
|
|
/* '.' at beginning of line (confuses some SMTPs) */
|
|
if (lineLen == 0 && ch == '.') {
|
|
outLen += 3;
|
|
lineLen += 3;
|
|
}
|
|
/* "From " at beginning of line (gets mangled in mbox folders) */
|
|
else if (lineLen == 0 && inPos+3 < aInLen && ch == 'F'
|
|
&& aIn[inPos ] == 'r' && aIn[inPos+1] == 'o'
|
|
&& aIn[inPos+2] == 'm' && aIn[inPos+3] == ' ') {
|
|
outLen += 3;
|
|
lineLen += 3;
|
|
}
|
|
/* Normal printable char */
|
|
else if ((62 <= ch && ch <= 126) || (33 <= ch && ch <= 60)) {
|
|
++outLen;
|
|
++lineLen;
|
|
}
|
|
/* Space */
|
|
else if (ch == ' ') {
|
|
/* Space at end of line or end of input must be encoded */
|
|
#if defined(DW_EOL_LF)
|
|
if (inPos >= aInLen /* End of input? */
|
|
|| aIn[inPos] == '\n') { /* End of line? */
|
|
|
|
outLen += 3;
|
|
lineLen += 3;
|
|
}
|
|
#elif defined(DW_EOL_CRLF)
|
|
if (inPos >= aInLen /* End of input? */
|
|
|| (inPos < aInLen-1 /* End of line? */
|
|
&& aIn[inPos ] == '\r'
|
|
&& aIn[inPos+1] == '\n') ) {
|
|
|
|
outLen += 3;
|
|
lineLen += 3;
|
|
}
|
|
#else
|
|
# error Must define DW_EOL_LF or DW_EOL_CRLF
|
|
#endif
|
|
else {
|
|
++outLen;
|
|
++lineLen;
|
|
}
|
|
}
|
|
/* Hard line break */
|
|
#if defined(DW_EOL_LF)
|
|
else if (ch == '\n') {
|
|
++outLen;
|
|
lineLen = 0;
|
|
}
|
|
#elif defined(DW_EOL_CRLF)
|
|
else if (inPos < aInLen && ch == '\r' && aIn[inPos] == '\n') {
|
|
++inPos;
|
|
outLen += 2;
|
|
lineLen = 0;
|
|
}
|
|
#endif
|
|
/* Non-printable char */
|
|
else if (ch & 0x80 /* 8-bit char */
|
|
|| !(ch & 0xE0) /* control char */
|
|
|| ch == 0x7F /* DEL */
|
|
|| ch == '=') { /* special case */
|
|
outLen += 3;
|
|
lineLen += 3;
|
|
}
|
|
/* Soft line break */
|
|
#if defined(DW_EOL_LF)
|
|
if (lineLen >= MAXLINE-3 && inPos < aInLen && aIn[inPos] != '\n') {
|
|
outLen += 2;
|
|
lineLen = 0;
|
|
}
|
|
#elif defined(DW_EOL_CRLF)
|
|
if (lineLen >= MAXLINE-3 && !(inPos < aInLen-1 &&
|
|
aIn[inPos] == '\r' && aIn[inPos+1] == '\n')) {
|
|
|
|
outLen += 3;
|
|
lineLen = 0;
|
|
}
|
|
#endif
|
|
}
|
|
return outLen;
|
|
}
|
|
|