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<h2><a name="content"></a>libkpgp</h2>
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<h1>kpgpbase.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> kpgpbase.cpp</span>
<a name="l00003"></a>00003 <span class="comment"></span>
<a name="l00004"></a>00004 <span class="comment"> Copyright (C) 2001,2002 the KPGP authors</span>
<a name="l00005"></a>00005 <span class="comment"> See file AUTHORS.kpgp for details</span>
<a name="l00006"></a>00006 <span class="comment"></span>
<a name="l00007"></a>00007 <span class="comment"> This file is part of KPGP, the KDE PGP/GnuPG support library.</span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> KPGP is free software; you can redistribute it and/or modify</span>
<a name="l00010"></a>00010 <span class="comment"> it under the terms of the GNU General Public License as published by</span>
<a name="l00011"></a>00011 <span class="comment"> the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00012"></a>00012 <span class="comment"> (at your option) any later version.</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment"> You should have received a copy of the GNU General Public License</span>
<a name="l00015"></a>00015 <span class="comment"> along with this program; if not, write to the Free Software Foundation,</span>
<a name="l00016"></a>00016 <span class="comment"> Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA</span>
<a name="l00017"></a>00017 <span class="comment"> */</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#include <kdebug.h></span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#include <config.h></span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="preprocessor">#include "kpgpbase.h"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "kpgp.h"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "kpgpblock.h"</span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="preprocessor">#include <stdlib.h></span> <span class="comment">/* setenv, unsetenv */</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <unistd.h></span> <span class="comment">/* pipe, close, fork, dup2, execl, _exit, write, read */</span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <sys/poll.h></span> <span class="comment">/* poll, etc. */</span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <sys/types.h></span> <span class="comment">/* pid_t */</span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <sys/wait.h></span> <span class="comment">/* waitpid */</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <errno.h></span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="preprocessor">#include <qapplication.h></span>
<a name="l00035"></a>00035
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="keyword">namespace </span>Kpgp {
<a name="l00038"></a>00038
<a name="l00039"></a>00039 Base::Base()
<a name="l00040"></a>00040 : input(), output(), error(), errMsg(), status(OK)
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 }
<a name="l00043"></a>00043
<a name="l00044"></a>00044
<a name="l00045"></a>00045 Base::~Base()
<a name="l00046"></a>00046 {
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <span class="keywordtype">void</span>
<a name="l00051"></a>00051 Base::clear()
<a name="l00052"></a>00052 {
<a name="l00053"></a>00053 input = QCString();
<a name="l00054"></a>00054 output = QCString();
<a name="l00055"></a>00055 error = QCString();
<a name="l00056"></a>00056 errMsg = QString::null;
<a name="l00057"></a>00057 status = OK;
<a name="l00058"></a>00058 }
<a name="l00059"></a>00059
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="keywordtype">int</span>
<a name="l00062"></a>00062 Base::run( <span class="keyword">const</span> <span class="keywordtype">char</span> *cmd, <span class="keyword">const</span> <span class="keywordtype">char</span> *passphrase, <span class="keywordtype">bool</span> onlyReadFromPGP )
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064 <span class="comment">/* the pipe ppass is used for to pass the password to</span>
<a name="l00065"></a>00065 <span class="comment"> * pgp. passing the password together with the normal input through</span>
<a name="l00066"></a>00066 <span class="comment"> * stdin doesn't seem to work as expected (at least for pgp5.0)</span>
<a name="l00067"></a>00067 <span class="comment"> */</span>
<a name="l00068"></a>00068 <span class="keywordtype">char</span> str[1025] = <span class="stringliteral">"\0"</span>;
<a name="l00069"></a>00069 <span class="keywordtype">int</span> pin[2], pout[2], perr[2], ppass[2];
<a name="l00070"></a>00070 <span class="keywordtype">int</span> len, len2;
<a name="l00071"></a>00071 FILE *pass;
<a name="l00072"></a>00072 pid_t child_pid;
<a name="l00073"></a>00073 <span class="keywordtype">int</span> childExitStatus;
<a name="l00074"></a>00074 <span class="keyword">struct </span>pollfd pollin, pollout, pollerr;
<a name="l00075"></a>00075 <span class="keywordtype">int</span> pollstatus;
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <span class="keywordflow">if</span>(passphrase)
<a name="l00078"></a>00078 {
<a name="l00079"></a>00079 pipe(ppass);
<a name="l00080"></a>00080
<a name="l00081"></a>00081 pass = fdopen(ppass[1], <span class="stringliteral">"w"</span>);
<a name="l00082"></a>00082 fwrite(passphrase, <span class="keyword">sizeof</span>(<span class="keywordtype">char</span>), strlen(passphrase), pass);
<a name="l00083"></a>00083 fwrite(<span class="stringliteral">"\n"</span>, <span class="keyword">sizeof</span>(<span class="keywordtype">char</span>), 1, pass);
<a name="l00084"></a>00084 fclose(pass);
<a name="l00085"></a>00085 close(ppass[1]);
<a name="l00086"></a>00086
<a name="l00087"></a>00087 <span class="comment">// tell pgp which fd to use for the passphrase</span>
<a name="l00088"></a>00088 QCString tmp;
<a name="l00089"></a>00089 tmp.sprintf(<span class="stringliteral">"%d"</span>,ppass[0]);
<a name="l00090"></a>00090 ::setenv(<span class="stringliteral">"PGPPASSFD"</span>,tmp.data(),1);
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="comment">//Uncomment these lines for testing only! Doing so will decrease security!</span>
<a name="l00093"></a>00093 <span class="comment">//kdDebug(5100) << "pgp PGPPASSFD = " << tmp << endl;</span>
<a name="l00094"></a>00094 <span class="comment">//kdDebug(5100) << "pgp pass = " << passphrase << endl;</span>
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096 else
<a name="l00097"></a>00097 ::unsetenv(<span class="stringliteral">"PGPPASSFD"</span>);
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="comment">//Uncomment these lines for testing only! Doing so will decrease security!</span>
<a name="l00100"></a>00100 kdDebug(5100) << <span class="stringliteral">"pgp cmd = "</span> << cmd << endl;
<a name="l00101"></a>00101 <span class="comment">//kdDebug(5100) << "pgp input = " << QString(input)</span>
<a name="l00102"></a>00102 <span class="comment">// << "input length = " << input.length() << endl;</span>
<a name="l00103"></a>00103
<a name="l00104"></a>00104 error = <span class="stringliteral">""</span>;
<a name="l00105"></a>00105 output = <span class="stringliteral">""</span>;
<a name="l00106"></a>00106
<a name="l00107"></a>00107 pipe(pin);
<a name="l00108"></a>00108 pipe(pout);
<a name="l00109"></a>00109 pipe(perr);
<a name="l00110"></a>00110
<a name="l00111"></a>00111 QApplication::flushX();
<a name="l00112"></a>00112 <span class="keywordflow">if</span>(!(child_pid = fork()))
<a name="l00113"></a>00113 {
<a name="l00114"></a>00114 <span class="comment">/*We're the child.*/</span>
<a name="l00115"></a>00115 close(pin[1]);
<a name="l00116"></a>00116 dup2(pin[0], 0);
<a name="l00117"></a>00117 close(pin[0]);
<a name="l00118"></a>00118
<a name="l00119"></a>00119 close(pout[0]);
<a name="l00120"></a>00120 dup2(pout[1], 1);
<a name="l00121"></a>00121 close(pout[1]);
<a name="l00122"></a>00122
<a name="l00123"></a>00123 close(perr[0]);
<a name="l00124"></a>00124 dup2(perr[1], 2);
<a name="l00125"></a>00125 close(perr[1]);
<a name="l00126"></a>00126
<a name="l00127"></a>00127 execl(<span class="stringliteral">"/bin/sh"</span>, <span class="stringliteral">"sh"</span>, <span class="stringliteral">"-c"</span>, cmd, (<span class="keywordtype">void</span> *)0);
<a name="l00128"></a>00128 _exit(127);
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="comment">/*Only get here if we're the parent.*/</span>
<a name="l00132"></a>00132 close(pin[0]);
<a name="l00133"></a>00133 close(pout[1]);
<a name="l00134"></a>00134 close(perr[1]);
<a name="l00135"></a>00135
<a name="l00136"></a>00136 <span class="comment">// poll for "There is data to read."</span>
<a name="l00137"></a>00137 pollout.fd = pout[0];
<a name="l00138"></a>00138 pollout.events = POLLIN;
<a name="l00139"></a>00139 pollout.revents = 0; <span class="comment">// init with 0, just in case</span>
<a name="l00140"></a>00140 pollerr.fd = perr[0];
<a name="l00141"></a>00141 pollerr.events = POLLIN;
<a name="l00142"></a>00142 pollerr.revents = 0; <span class="comment">// init with 0, just in case</span>
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <span class="comment">// poll for "Writing now will not block."</span>
<a name="l00145"></a>00145 pollin.fd = pin[1];
<a name="l00146"></a>00146 pollin.events = POLLOUT;
<a name="l00147"></a>00147 pollin.revents = 0; <span class="comment">// init with 0, just in case</span>
<a name="l00148"></a>00148
<a name="l00149"></a>00149 <span class="keywordflow">if</span> (!onlyReadFromPGP) {
<a name="l00150"></a>00150 <span class="keywordflow">if</span> (!input.isEmpty()) {
<a name="l00151"></a>00151 <span class="comment">// write to pin[1] one line after the other to prevent dead lock</span>
<a name="l00152"></a>00152 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<input.length(); i+=len2) {
<a name="l00153"></a>00153 len2 = 0;
<a name="l00154"></a>00154
<a name="l00155"></a>00155 <span class="comment">// check if writing now to pin[1] will not block (5 ms timeout)</span>
<a name="l00156"></a>00156 <span class="comment">//kdDebug(5100) << "Polling pin[1]..." << endl;</span>
<a name="l00157"></a>00157 pollstatus = poll(&pollin, 1, 5);
<a name="l00158"></a>00158 <span class="keywordflow">if</span> (pollstatus == 1) {
<a name="l00159"></a>00159 <span class="comment">//kdDebug(5100) << "Status for polling pin[1]: " << pollin.revents << endl;</span>
<a name="l00160"></a>00160 <span class="keywordflow">if</span> (pollin.revents & POLLERR) {
<a name="l00161"></a>00161 kdDebug(5100) << <span class="stringliteral">"PGP seems to have hung up"</span> << endl;
<a name="l00162"></a>00162 <span class="keywordflow">break</span>;
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (pollin.revents & POLLOUT) {
<a name="l00165"></a>00165 <span class="comment">// search end of next line</span>
<a name="l00166"></a>00166 <span class="keywordflow">if</span> ((len2 = input.find(<span class="charliteral">'\n'</span>, i)) == -1)
<a name="l00167"></a>00167 len2 = input.length()-i;
<a name="l00168"></a>00168 <span class="keywordflow">else</span>
<a name="l00169"></a>00169 len2 = len2-i+1;
<a name="l00170"></a>00170
<a name="l00171"></a>00171 <span class="comment">//kdDebug(5100) << "Trying to write " << len2 << " bytes to pin[1] ..." << endl;</span>
<a name="l00172"></a>00172 len2 = write(pin[1], input.mid(i,len2).data(), len2);
<a name="l00173"></a>00173 <span class="comment">//kdDebug(5100) << "Wrote " << len2 << " bytes to pin[1] ..." << endl;</span>
<a name="l00174"></a>00174 }
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!pollstatus) {
<a name="l00177"></a>00177 <span class="comment">//kdDebug(5100) << "Timeout while polling pin[1]: "</span>
<a name="l00178"></a>00178 <span class="comment">// << pollin.revents << endl;</span>
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (pollstatus == -1) {
<a name="l00181"></a>00181 kdDebug(5100) << <span class="stringliteral">"Error while polling pin[1]: "</span>
<a name="l00182"></a>00182 << pollin.revents << endl;
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184
<a name="l00185"></a>00185 <span class="keywordflow">if</span> (pout[0] >= 0) {
<a name="l00186"></a>00186 <span class="keywordflow">do</span> {
<a name="l00187"></a>00187 <span class="comment">// check if there is data to read from pout[0]</span>
<a name="l00188"></a>00188 <span class="comment">//kdDebug(5100) << "Polling pout[0]..." << endl;</span>
<a name="l00189"></a>00189 pollstatus = poll(&pollout, 1, 0);
<a name="l00190"></a>00190 <span class="keywordflow">if</span> (pollstatus == 1) {
<a name="l00191"></a>00191 <span class="comment">//kdDebug(5100) << "Status for polling pout[0]: " << pollout.revents << endl;</span>
<a name="l00192"></a>00192 <span class="keywordflow">if</span> (pollout.revents & POLLIN) {
<a name="l00193"></a>00193 <span class="comment">//kdDebug(5100) << "Trying to read " << 1024 << " bytes from pout[0]" << endl;</span>
<a name="l00194"></a>00194 <span class="keywordflow">if</span> ((len = read(pout[0],str,1024))>0) {
<a name="l00195"></a>00195 <span class="comment">//kdDebug(5100) << "Read " << len << " bytes from pout[0]" << endl;</span>
<a name="l00196"></a>00196 str[len] =<span class="charliteral">'\0'</span>;
<a name="l00197"></a>00197 output += str;
<a name="l00198"></a>00198 }
<a name="l00199"></a>00199 <span class="keywordflow">else</span>
<a name="l00200"></a>00200 <span class="keywordflow">break</span>;
<a name="l00201"></a>00201 }
<a name="l00202"></a>00202 }
<a name="l00203"></a>00203 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (pollstatus == -1) {
<a name="l00204"></a>00204 kdDebug(5100) << <span class="stringliteral">"Error while polling pout[0]: "</span>
<a name="l00205"></a>00205 << pollout.revents << endl;
<a name="l00206"></a>00206 }
<a name="l00207"></a>00207 } <span class="keywordflow">while</span> ((pollstatus == 1) && (pollout.revents & POLLIN));
<a name="l00208"></a>00208 }
<a name="l00209"></a>00209
<a name="l00210"></a>00210 <span class="keywordflow">if</span> (perr[0] >= 0) {
<a name="l00211"></a>00211 <span class="keywordflow">do</span> {
<a name="l00212"></a>00212 <span class="comment">// check if there is data to read from perr[0]</span>
<a name="l00213"></a>00213 <span class="comment">//kdDebug(5100) << "Polling perr[0]..." << endl;</span>
<a name="l00214"></a>00214 pollstatus = poll(&pollerr, 1, 0);
<a name="l00215"></a>00215 <span class="keywordflow">if</span> (pollstatus == 1) {
<a name="l00216"></a>00216 <span class="comment">//kdDebug(5100) << "Status for polling perr[0]: " << pollerr.revents << endl;</span>
<a name="l00217"></a>00217 <span class="keywordflow">if</span> (pollerr.revents & POLLIN) {
<a name="l00218"></a>00218 <span class="comment">//kdDebug(5100) << "Trying to read " << 1024 << " bytes from perr[0]" << endl;</span>
<a name="l00219"></a>00219 <span class="keywordflow">if</span> ((len = read(perr[0],str,1024))>0) {
<a name="l00220"></a>00220 <span class="comment">//kdDebug(5100) << "Read " << len << " bytes from perr[0]" << endl;</span>
<a name="l00221"></a>00221 str[len] =<span class="charliteral">'\0'</span>;
<a name="l00222"></a>00222 error += str;
<a name="l00223"></a>00223 }
<a name="l00224"></a>00224 <span class="keywordflow">else</span>
<a name="l00225"></a>00225 <span class="keywordflow">break</span>;
<a name="l00226"></a>00226 }
<a name="l00227"></a>00227 }
<a name="l00228"></a>00228 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (pollstatus == -1) {
<a name="l00229"></a>00229 kdDebug(5100) << <span class="stringliteral">"Error while polling perr[0]: "</span>
<a name="l00230"></a>00230 << pollerr.revents << endl;
<a name="l00231"></a>00231 }
<a name="l00232"></a>00232 } <span class="keywordflow">while</span> ((pollstatus == 1) && (pollerr.revents & POLLIN));
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234
<a name="l00235"></a>00235 <span class="comment">// abort writing to PGP if PGP hung up</span>
<a name="l00236"></a>00236 <span class="keywordflow">if</span> ((pollstatus == 1) &&
<a name="l00237"></a>00237 ((pollout.revents & POLLHUP) || (pollerr.revents & POLLHUP))) {
<a name="l00238"></a>00238 kdDebug(5100) << <span class="stringliteral">"PGP hung up"</span> << endl;
<a name="l00239"></a>00239 <span class="keywordflow">break</span>;
<a name="l00240"></a>00240 }
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242 }
<a name="l00243"></a>00243 <span class="keywordflow">else</span> <span class="comment">// if input.isEmpty()</span>
<a name="l00244"></a>00244 write(pin[1], <span class="stringliteral">"\n"</span>, 1);
<a name="l00245"></a>00245 <span class="comment">//kdDebug(5100) << "All input was written to pin[1]" << endl;</span>
<a name="l00246"></a>00246 }
<a name="l00247"></a>00247 close(pin[1]);
<a name="l00248"></a>00248
<a name="l00249"></a>00249 pid_t waitpidRetVal;
<a name="l00250"></a>00250
<a name="l00251"></a>00251 <span class="keywordflow">do</span> {
<a name="l00252"></a>00252 <span class="comment">//kdDebug(5100) << "Checking if PGP is still running..." << endl;</span>
<a name="l00253"></a>00253 childExitStatus = 0;
<a name="l00254"></a>00254 waitpidRetVal = waitpid(child_pid, &childExitStatus, WNOHANG);
<a name="l00255"></a>00255 <span class="comment">//kdDebug(5100) << "waitpid returned " << waitpidRetVal << endl;</span>
<a name="l00256"></a>00256 <span class="keywordflow">if</span> (pout[0] >= 0) {
<a name="l00257"></a>00257 <span class="keywordflow">do</span> {
<a name="l00258"></a>00258 <span class="comment">// check if there is data to read from pout[0]</span>
<a name="l00259"></a>00259 <span class="comment">//kdDebug(5100) << "Polling pout[0]..." << endl;</span>
<a name="l00260"></a>00260 pollstatus = poll(&pollout, 1, 0);
<a name="l00261"></a>00261 <span class="keywordflow">if</span> (pollstatus == 1) {
<a name="l00262"></a>00262 <span class="comment">//kdDebug(5100) << "Status for polling pout[0]: " << pollout.revents << endl;</span>
<a name="l00263"></a>00263 <span class="keywordflow">if</span> (pollout.revents & POLLIN) {
<a name="l00264"></a>00264 <span class="comment">//kdDebug(5100) << "Trying to read " << 1024 << " bytes from pout[0]" << endl;</span>
<a name="l00265"></a>00265 <span class="keywordflow">if</span> ((len = read(pout[0],str,1024))>0) {
<a name="l00266"></a>00266 <span class="comment">//kdDebug(5100) << "Read " << len << " bytes from pout[0]" << endl;</span>
<a name="l00267"></a>00267 str[len] =<span class="charliteral">'\0'</span>;
<a name="l00268"></a>00268 output += str;
<a name="l00269"></a>00269 } <span class="keywordflow">else</span> {
<a name="l00270"></a>00270 <span class="comment">/*</span>
<a name="l00271"></a>00271 <span class="comment"> * Apparently, on NetBSD when the child dies, the pipe begins</span>
<a name="l00272"></a>00272 <span class="comment"> * receiving empty data packets *before* waitpid() has signaled</span>
<a name="l00273"></a>00273 <span class="comment"> * that the child has died. Also, notice that this happens</span>
<a name="l00274"></a>00274 <span class="comment"> * without any error bit being set in pollfd.revents (is this a</span>
<a name="l00275"></a>00275 <span class="comment"> * NetBSD bug??? ). Notice that these anomalous packets exist</span>
<a name="l00276"></a>00276 <span class="comment"> * according to poll(), but have length 0 according to read().</span>
<a name="l00277"></a>00277 <span class="comment"> * Thus, kde can remain stuck inside this loop.</span>
<a name="l00278"></a>00278 <span class="comment"> *</span>
<a name="l00279"></a>00279 <span class="comment"> * A solution to this problem is to get out of the inner loop</span>
<a name="l00280"></a>00280 <span class="comment"> * when read() returns <=0. In this way, kde has another chance</span>
<a name="l00281"></a>00281 <span class="comment"> * to call waitpid() to check if the child has died -- and this</span>
<a name="l00282"></a>00282 <span class="comment"> * time the call should succeed.</span>
<a name="l00283"></a>00283 <span class="comment"> *</span>
<a name="l00284"></a>00284 <span class="comment"> * Setting POLLHUP in pollfd.revents is not necessary, but I just</span>
<a name="l00285"></a>00285 <span class="comment"> * like the idea of signaling that something strange has</span>
<a name="l00286"></a>00286 <span class="comment"> * happened.</span>
<a name="l00287"></a>00287 <span class="comment"> */</span>
<a name="l00288"></a>00288 pollout.revents |= POLLHUP;
<a name="l00289"></a>00289 <span class="keywordflow">break</span>;
<a name="l00290"></a>00290 }
<a name="l00291"></a>00291 }
<a name="l00292"></a>00292 }
<a name="l00293"></a>00293 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (pollstatus == -1) {
<a name="l00294"></a>00294 kdDebug(5100) << <span class="stringliteral">"Error while polling pout[0]: "</span>
<a name="l00295"></a>00295 << pollout.revents << endl;
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297 } <span class="keywordflow">while</span> ((pollstatus == 1) && (pollout.revents & POLLIN));
<a name="l00298"></a>00298 }
<a name="l00299"></a>00299
<a name="l00300"></a>00300 <span class="keywordflow">if</span> (perr[0] >= 0) {
<a name="l00301"></a>00301 <span class="keywordflow">do</span> {
<a name="l00302"></a>00302 <span class="comment">// check if there is data to read from perr[0]</span>
<a name="l00303"></a>00303 <span class="comment">//kdDebug(5100) << "Polling perr[0]..." << endl;</span>
<a name="l00304"></a>00304 pollstatus = poll(&pollerr, 1, 0);
<a name="l00305"></a>00305 <span class="keywordflow">if</span> (pollstatus == 1) {
<a name="l00306"></a>00306 <span class="comment">//kdDebug(5100) << "Status for polling perr[0]: " << pollerr.revents << endl;</span>
<a name="l00307"></a>00307 <span class="keywordflow">if</span> (pollerr.revents & POLLIN) {
<a name="l00308"></a>00308 <span class="comment">//kdDebug(5100) << "Trying to read " << 1024 << " bytes from perr[0]" << endl;</span>
<a name="l00309"></a>00309 <span class="keywordflow">if</span> ((len = read(perr[0],str,1024))>0) {
<a name="l00310"></a>00310 <span class="comment">//kdDebug(5100) << "Read " << len << " bytes from perr[0]" << endl;</span>
<a name="l00311"></a>00311 str[len] =<span class="charliteral">'\0'</span>;
<a name="l00312"></a>00312 error += str;
<a name="l00313"></a>00313 } <span class="keywordflow">else</span> {
<a name="l00314"></a>00314 <span class="comment">/*</span>
<a name="l00315"></a>00315 <span class="comment"> * Apparently, on NetBSD when the child dies, the pipe begins</span>
<a name="l00316"></a>00316 <span class="comment"> * receiving empty data packets *before* waitpid() has signaled</span>
<a name="l00317"></a>00317 <span class="comment"> * that the child has died. Also, notice that this happens</span>
<a name="l00318"></a>00318 <span class="comment"> * without any error bit being set in pollfd.revents (is this a</span>
<a name="l00319"></a>00319 <span class="comment"> * NetBSD bug??? ). Notice that these anomalous packets exist</span>
<a name="l00320"></a>00320 <span class="comment"> * according to poll(), but have length 0 according to read().</span>
<a name="l00321"></a>00321 <span class="comment"> * Thus, kde can remain stuck inside this loop.</span>
<a name="l00322"></a>00322 <span class="comment"> *</span>
<a name="l00323"></a>00323 <span class="comment"> * A solution to this problem is to get out of the inner loop</span>
<a name="l00324"></a>00324 <span class="comment"> * when read() returns <=0. In this way, kde has another chance</span>
<a name="l00325"></a>00325 <span class="comment"> * to call waitpid() to check if the child has died -- and this</span>
<a name="l00326"></a>00326 <span class="comment"> * time the call should succeed.</span>
<a name="l00327"></a>00327 <span class="comment"> *</span>
<a name="l00328"></a>00328 <span class="comment"> * Setting POLLHUP in pollfd.revents is not necessary, but I just</span>
<a name="l00329"></a>00329 <span class="comment"> * like the idea of signaling that something strange has</span>
<a name="l00330"></a>00330 <span class="comment"> * happened.</span>
<a name="l00331"></a>00331 <span class="comment"> */</span>
<a name="l00332"></a>00332 pollerr.revents |= POLLHUP;
<a name="l00333"></a>00333 <span class="keywordflow">break</span>;
<a name="l00334"></a>00334 }
<a name="l00335"></a>00335 }
<a name="l00336"></a>00336 }
<a name="l00337"></a>00337 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (pollstatus == -1) {
<a name="l00338"></a>00338 kdDebug(5100) << <span class="stringliteral">"Error while polling perr[0]: "</span>
<a name="l00339"></a>00339 << pollerr.revents << endl;
<a name="l00340"></a>00340 }
<a name="l00341"></a>00341 } <span class="keywordflow">while</span> ((pollstatus == 1) && (pollerr.revents & POLLIN));
<a name="l00342"></a>00342 }
<a name="l00343"></a>00343 } <span class="keywordflow">while</span> (waitpidRetVal == 0);
<a name="l00344"></a>00344
<a name="l00345"></a>00345 close(pout[0]);
<a name="l00346"></a>00346 close(perr[0]);
<a name="l00347"></a>00347
<a name="l00348"></a>00348 unsetenv(<span class="stringliteral">"PGPPASSFD"</span>);
<a name="l00349"></a>00349 <span class="keywordflow">if</span>(passphrase)
<a name="l00350"></a>00350 close(ppass[0]);
<a name="l00351"></a>00351
<a name="l00352"></a>00352 <span class="comment">// Did the child exit normally?</span>
<a name="l00353"></a>00353 <span class="keywordflow">if</span> (WIFEXITED(childExitStatus) != 0) {
<a name="l00354"></a>00354 <span class="comment">// Get the return code of the child</span>
<a name="l00355"></a>00355 childExitStatus = WEXITSTATUS(childExitStatus);
<a name="l00356"></a>00356 kdDebug(5100) << <span class="stringliteral">"PGP exited with exit status "</span> << childExitStatus
<a name="l00357"></a>00357 << endl;
<a name="l00358"></a>00358 }
<a name="l00359"></a>00359 <span class="keywordflow">else</span> {
<a name="l00360"></a>00360 childExitStatus = -1;
<a name="l00361"></a>00361 kdDebug(5100) << <span class="stringliteral">"PGP exited abnormally!"</span> << endl;
<a name="l00362"></a>00362 }
<a name="l00363"></a>00363
<a name="l00364"></a>00364 <span class="comment">//Uncomment these lines for testing only! Doing so will decrease security!</span>
<a name="l00365"></a>00365 <span class="comment">//kdDebug(5100) << "pgp output = " << QString(output) << endl;</span>
<a name="l00366"></a>00366 <span class="comment">//kdDebug(5100) << "pgp error = " << error << endl;</span>
<a name="l00367"></a>00367
<a name="l00368"></a>00368 <span class="comment">/* Make the information visible, so that a user can</span>
<a name="l00369"></a>00369 <span class="comment"> * get to know what's going on during the pgp calls.</span>
<a name="l00370"></a>00370 <span class="comment"> */</span>
<a name="l00371"></a>00371 kdDebug(5100) << error << endl;
<a name="l00372"></a>00372
<a name="l00373"></a>00373 <span class="keywordflow">return</span> childExitStatus;
<a name="l00374"></a>00374 }
<a name="l00375"></a>00375
<a name="l00376"></a>00376
<a name="l00377"></a>00377 <span class="keywordtype">int</span>
<a name="l00378"></a>00378 Base::runGpg( <span class="keyword">const</span> <span class="keywordtype">char</span> *cmd, <span class="keyword">const</span> <span class="keywordtype">char</span> *passphrase, <span class="keywordtype">bool</span> onlyReadFromGnuPG )
<a name="l00379"></a>00379 {
<a name="l00380"></a>00380 <span class="comment">/* the pipe ppass is used for to pass the password to</span>
<a name="l00381"></a>00381 <span class="comment"> * pgp. passing the password together with the normal input through</span>
<a name="l00382"></a>00382 <span class="comment"> * stdin doesn't seem to work as expected (at least for pgp5.0)</span>
<a name="l00383"></a>00383 <span class="comment"> */</span>
<a name="l00384"></a>00384 <span class="keywordtype">char</span> str[1025] = <span class="stringliteral">"\0"</span>;
<a name="l00385"></a>00385 <span class="keywordtype">int</span> pin[2], pout[2], perr[2], ppass[2];
<a name="l00386"></a>00386 <span class="keywordtype">int</span> len, len2;
<a name="l00387"></a>00387 FILE *pass;
<a name="l00388"></a>00388 pid_t child_pid;
<a name="l00389"></a>00389 <span class="keywordtype">int</span> childExitStatus;
<a name="l00390"></a>00390 <span class="keywordtype">char</span> gpgcmd[1024] = <span class="stringliteral">"\0"</span>;
<a name="l00391"></a>00391 <span class="keyword">struct </span>pollfd poller[3];
<a name="l00392"></a>00392 <span class="keywordtype">int</span> num_pollers = 0;
<a name="l00393"></a>00393 <span class="keyword">const</span> <span class="keywordtype">int</span> STD_OUT = 0;
<a name="l00394"></a>00394 <span class="keyword">const</span> <span class="keywordtype">int</span> STD_ERR = 1;
<a name="l00395"></a>00395 <span class="keyword">const</span> <span class="keywordtype">int</span> STD_IN = 2;
<a name="l00396"></a>00396 <span class="keywordtype">int</span> pollstatus;
<a name="l00397"></a>00397
<a name="l00398"></a>00398 <span class="keywordflow">if</span>(passphrase)
<a name="l00399"></a>00399 {
<a name="l00400"></a>00400 pipe(ppass);
<a name="l00401"></a>00401
<a name="l00402"></a>00402 pass = fdopen(ppass[1], <span class="stringliteral">"w"</span>);
<a name="l00403"></a>00403 fwrite(passphrase, <span class="keyword">sizeof</span>(<span class="keywordtype">char</span>), strlen(passphrase), pass);
<a name="l00404"></a>00404 fwrite(<span class="stringliteral">"\n"</span>, <span class="keyword">sizeof</span>(<span class="keywordtype">char</span>), 1, pass);
<a name="l00405"></a>00405 fclose(pass);
<a name="l00406"></a>00406 close(ppass[1]);
<a name="l00407"></a>00407
<a name="l00408"></a>00408 <span class="comment">//Uncomment these lines for testing only! Doing so will decrease security!</span>
<a name="l00409"></a>00409 <span class="comment">//kdDebug(5100) << "pass = " << passphrase << endl;</span>
<a name="l00410"></a>00410 }
<a name="l00411"></a>00411
<a name="l00412"></a>00412 <span class="comment">//Uncomment these lines for testing only! Doing so will decrease security!</span>
<a name="l00413"></a>00413 <span class="comment">//kdDebug(5100) << "pgp cmd = " << cmd << endl;</span>
<a name="l00414"></a>00414 <span class="comment">//kdDebug(5100) << "pgp input = " << QString(input)</span>
<a name="l00415"></a>00415 <span class="comment">// << "input length = " << input.length() << endl;</span>
<a name="l00416"></a>00416
<a name="l00417"></a>00417 error = <span class="stringliteral">""</span>;
<a name="l00418"></a>00418 output = <span class="stringliteral">""</span>;
<a name="l00419"></a>00419
<a name="l00420"></a>00420 pipe(pin);
<a name="l00421"></a>00421 pipe(pout);
<a name="l00422"></a>00422 pipe(perr);
<a name="l00423"></a>00423
<a name="l00424"></a>00424 <span class="keywordflow">if</span>( passphrase ) {
<a name="l00425"></a>00425 <span class="keywordflow">if</span>( mVersion >= <span class="stringliteral">"1.0.7"</span> ) {
<a name="l00426"></a>00426 <span class="comment">// GnuPG >= 1.0.7 supports the gpg-agent, so we look for it.</span>
<a name="l00427"></a>00427 <span class="keywordflow">if</span>( 0 == getenv(<span class="stringliteral">"GPG_AGENT_INFO"</span>) ) {
<a name="l00428"></a>00428 <span class="comment">// gpg-agent not found, so we tell gpg not to use the agent</span>
<a name="l00429"></a>00429 snprintf( gpgcmd, 1023,
<a name="l00430"></a>00430 <span class="stringliteral">"LANGUAGE=C gpg --no-use-agent --passphrase-fd %d %s"</span>,
<a name="l00431"></a>00431 ppass[0], cmd );
<a name="l00432"></a>00432 }
<a name="l00433"></a>00433 <span class="keywordflow">else</span> {
<a name="l00434"></a>00434 <span class="comment">// gpg-agent seems to be running, so we tell gpg to use the agent</span>
<a name="l00435"></a>00435 snprintf( gpgcmd, 1023,
<a name="l00436"></a>00436 <span class="stringliteral">"LANGUAGE=C gpg --use-agent %s"</span>,
<a name="l00437"></a>00437 cmd );
<a name="l00438"></a>00438 }
<a name="l00439"></a>00439 }
<a name="l00440"></a>00440 <span class="keywordflow">else</span> {
<a name="l00441"></a>00441 <span class="comment">// GnuPG < 1.0.7 doesn't know anything about the gpg-agent</span>
<a name="l00442"></a>00442 snprintf( gpgcmd, 1023,
<a name="l00443"></a>00443 <span class="stringliteral">"LANGUAGE=C gpg --passphrase-fd %d %s"</span>,
<a name="l00444"></a>00444 ppass[0], cmd );
<a name="l00445"></a>00445 }
<a name="l00446"></a>00446 }
<a name="l00447"></a>00447 <span class="keywordflow">else</span> {
<a name="l00448"></a>00448 snprintf(gpgcmd, 1023, <span class="stringliteral">"LANGUAGE=C gpg %s"</span>,cmd);
<a name="l00449"></a>00449 }
<a name="l00450"></a>00450
<a name="l00451"></a>00451 QApplication::flushX();
<a name="l00452"></a>00452 <span class="keywordflow">if</span>(!(child_pid = fork()))
<a name="l00453"></a>00453 {
<a name="l00454"></a>00454 <span class="comment">/*We're the child.*/</span>
<a name="l00455"></a>00455 close(pin[1]);
<a name="l00456"></a>00456 dup2(pin[0], 0);
<a name="l00457"></a>00457 close(pin[0]);
<a name="l00458"></a>00458
<a name="l00459"></a>00459 close(pout[0]);
<a name="l00460"></a>00460 dup2(pout[1], 1);
<a name="l00461"></a>00461 close(pout[1]);
<a name="l00462"></a>00462
<a name="l00463"></a>00463 close(perr[0]);
<a name="l00464"></a>00464 dup2(perr[1], 2);
<a name="l00465"></a>00465 close(perr[1]);
<a name="l00466"></a>00466
<a name="l00467"></a>00467 <span class="comment">//#warning FIXME: there has to be a better way to do this</span>
<a name="l00468"></a>00468 <span class="comment">/* this is nasty nasty nasty (but it works) */</span>
<a name="l00469"></a>00469 <span class="keywordflow">if</span>( passphrase ) {
<a name="l00470"></a>00470 <span class="keywordflow">if</span>( mVersion >= <span class="stringliteral">"1.0.7"</span> ) {
<a name="l00471"></a>00471 <span class="comment">// GnuPG >= 1.0.7 supports the gpg-agent, so we look for it.</span>
<a name="l00472"></a>00472 <span class="keywordflow">if</span>( 0 == getenv(<span class="stringliteral">"GPG_AGENT_INFO"</span>) ) {
<a name="l00473"></a>00473 <span class="comment">// gpg-agent not found, so we tell gpg not to use the agent</span>
<a name="l00474"></a>00474 snprintf( gpgcmd, 1023,
<a name="l00475"></a>00475 <span class="stringliteral">"LANGUAGE=C gpg --no-use-agent --passphrase-fd %d %s"</span>,
<a name="l00476"></a>00476 ppass[0], cmd );
<a name="l00477"></a>00477 }
<a name="l00478"></a>00478 <span class="keywordflow">else</span> {
<a name="l00479"></a>00479 <span class="comment">// gpg-agent seems to be running, so we tell gpg to use the agent</span>
<a name="l00480"></a>00480 snprintf( gpgcmd, 1023,
<a name="l00481"></a>00481 <span class="stringliteral">"LANGUAGE=C gpg --use-agent %s"</span>,
<a name="l00482"></a>00482 cmd );
<a name="l00483"></a>00483 }
<a name="l00484"></a>00484 }
<a name="l00485"></a>00485 <span class="keywordflow">else</span> {
<a name="l00486"></a>00486 <span class="comment">// GnuPG < 1.0.7 doesn't know anything about the gpg-agent</span>
<a name="l00487"></a>00487 snprintf( gpgcmd, 1023,
<a name="l00488"></a>00488 <span class="stringliteral">"LANGUAGE=C gpg --passphrase-fd %d %s"</span>,
<a name="l00489"></a>00489 ppass[0], cmd );
<a name="l00490"></a>00490 }
<a name="l00491"></a>00491 }
<a name="l00492"></a>00492 <span class="keywordflow">else</span> {
<a name="l00493"></a>00493 snprintf(gpgcmd, 1023, <span class="stringliteral">"LANGUAGE=C gpg %s"</span>,cmd);
<a name="l00494"></a>00494 }
<a name="l00495"></a>00495
<a name="l00496"></a>00496 kdDebug(5100) << <span class="stringliteral">"pgp cmd = "</span> << gpgcmd << endl;
<a name="l00497"></a>00497
<a name="l00498"></a>00498 execl(<span class="stringliteral">"/bin/sh"</span>, <span class="stringliteral">"sh"</span>, <span class="stringliteral">"-c"</span>, gpgcmd, (<span class="keywordtype">void</span> *)0);
<a name="l00499"></a>00499 _exit(127);
<a name="l00500"></a>00500 }
<a name="l00501"></a>00501
<a name="l00502"></a>00502 <span class="comment">// Only get here if we're the parent.</span>
<a name="l00503"></a>00503
<a name="l00504"></a>00504 close(pin[0]);
<a name="l00505"></a>00505 close(pout[1]);
<a name="l00506"></a>00506 close(perr[1]);
<a name="l00507"></a>00507
<a name="l00508"></a>00508 <span class="comment">// poll for "There is data to read."</span>
<a name="l00509"></a>00509 poller[STD_OUT].fd = pout[0];
<a name="l00510"></a>00510 poller[STD_OUT].events = POLLIN;
<a name="l00511"></a>00511 poller[STD_ERR].fd = perr[0];
<a name="l00512"></a>00512 poller[STD_ERR].events = POLLIN;
<a name="l00513"></a>00513 num_pollers = 2;
<a name="l00514"></a>00514
<a name="l00515"></a>00515 <span class="keywordflow">if</span> (!onlyReadFromGnuPG) {
<a name="l00516"></a>00516 <span class="comment">// poll for "Writing now will not block."</span>
<a name="l00517"></a>00517 poller[STD_IN].fd = pin[1];
<a name="l00518"></a>00518 poller[STD_IN].events = POLLOUT;
<a name="l00519"></a>00519 num_pollers = 3;
<a name="l00520"></a>00520 } <span class="keywordflow">else</span> {
<a name="l00521"></a>00521 close (pin[1]);
<a name="l00522"></a>00522 pin[1] = -1;
<a name="l00523"></a>00523 }
<a name="l00524"></a>00524
<a name="l00525"></a>00525 pid_t waitpidRetVal;
<a name="l00526"></a>00526 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> input_pos = 0;
<a name="l00527"></a>00527
<a name="l00528"></a>00528 <span class="keywordflow">do</span> {
<a name="l00529"></a>00529 <span class="comment">//kdDebug(5100) << "Checking if GnuPG is still running..." << endl;</span>
<a name="l00530"></a>00530 childExitStatus = 0;
<a name="l00531"></a>00531 waitpidRetVal = waitpid(child_pid, &childExitStatus, WNOHANG);
<a name="l00532"></a>00532 <span class="comment">//kdDebug(5100) << "waitpid returned " << waitpidRetVal << endl;</span>
<a name="l00533"></a>00533 <span class="keywordflow">do</span> {
<a name="l00534"></a>00534 <span class="comment">// poll the pipes</span>
<a name="l00535"></a>00535 pollstatus = poll(poller, num_pollers, 10);
<a name="l00536"></a>00536 <span class="keywordflow">if</span>( 0 < pollstatus ) {
<a name="l00537"></a>00537 <span class="comment">// Check stdout.</span>
<a name="l00538"></a>00538 <span class="keywordflow">if</span> (poller[STD_OUT].revents & POLLIN) {
<a name="l00539"></a>00539 <span class="comment">//kdDebug(5100) << "Trying to read " << 1024 << " bytes from pout[0]" << endl;</span>
<a name="l00540"></a>00540 <span class="keywordflow">if</span> ((len = read(pout[0],str,1024))>0) {
<a name="l00541"></a>00541 <span class="comment">//kdDebug(5100) << "Read " << len << " bytes from pout[0]" << endl;</span>
<a name="l00542"></a>00542 str[len] =<span class="charliteral">'\0'</span>;
<a name="l00543"></a>00543 output += str;
<a name="l00544"></a>00544 }
<a name="l00545"></a>00545 <span class="keywordflow">else</span> {
<a name="l00546"></a>00546 <span class="comment">// FreeBSD/NetBSD workaround</span>
<a name="l00547"></a>00547 <span class="comment">//</span>
<a name="l00548"></a>00548 <span class="comment">// Apparently, on Free/NetBSD when the child dies, the pipe begins</span>
<a name="l00549"></a>00549 <span class="comment">// receiving empty data packets *before* waitpid() has signaled</span>
<a name="l00550"></a>00550 <span class="comment">// that the child has died. Also, notice that this happens</span>
<a name="l00551"></a>00551 <span class="comment">// without any error bit being set in pollfd.revents (is this a</span>
<a name="l00552"></a>00552 <span class="comment">// Free/NetBSD bug??? ). Notice that these anomalous packets exist</span>
<a name="l00553"></a>00553 <span class="comment">// according to poll(), but have length 0 according to read().</span>
<a name="l00554"></a>00554 <span class="comment">// Thus, we can remain stuck inside this loop.</span>
<a name="l00555"></a>00555 <span class="comment">//</span>
<a name="l00556"></a>00556 <span class="comment">// A solution to this problem is to get out of the inner loop</span>
<a name="l00557"></a>00557 <span class="comment">// when read() returns <=0. In this way, we have another chance</span>
<a name="l00558"></a>00558 <span class="comment">// to call waitpid() to check if the child has died -- and this</span>
<a name="l00559"></a>00559 <span class="comment">// time the call should succeed.</span>
<a name="l00560"></a>00560 <span class="comment">//</span>
<a name="l00561"></a>00561 <span class="comment">// Set POLLHUP in pollfd.revents to signal that something strange</span>
<a name="l00562"></a>00562 <span class="comment">// has happened and disable polling of stdout.</span>
<a name="l00563"></a>00563 poller[STD_OUT].revents |= POLLHUP;
<a name="l00564"></a>00564 poller[STD_OUT].events = 0;
<a name="l00565"></a>00565 }
<a name="l00566"></a>00566 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (poller[STD_OUT].revents & POLLHUP) {
<a name="l00567"></a>00567 <span class="comment">// disable polling of stdout</span>
<a name="l00568"></a>00568 poller[STD_OUT].events = 0;
<a name="l00569"></a>00569 }
<a name="l00570"></a>00570
<a name="l00571"></a>00571 <span class="comment">// Check stderr.</span>
<a name="l00572"></a>00572 <span class="keywordflow">if</span> (poller[STD_ERR].revents & POLLIN) {
<a name="l00573"></a>00573 <span class="comment">//kdDebug(5100) << "Trying to read " << 1024 << " bytes from perr[0]" << endl;</span>
<a name="l00574"></a>00574 <span class="keywordflow">if</span> ((len = read(poller[STD_ERR].fd,str,1024))>0) {
<a name="l00575"></a>00575 <span class="comment">//kdDebug(5100) << "Read " << len << " bytes from perr[0]" << endl;</span>
<a name="l00576"></a>00576 str[len] =<span class="charliteral">'\0'</span>;
<a name="l00577"></a>00577 error += str;
<a name="l00578"></a>00578 }
<a name="l00579"></a>00579 <span class="keywordflow">else</span> {
<a name="l00580"></a>00580 <span class="comment">// FreeBSD/NetBSD workaround (for details see above)</span>
<a name="l00581"></a>00581 poller[STD_ERR].revents |= POLLHUP;
<a name="l00582"></a>00582 poller[STD_ERR].events = 0;
<a name="l00583"></a>00583 }
<a name="l00584"></a>00584 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (poller[STD_ERR].revents & POLLHUP) {
<a name="l00585"></a>00585 <span class="comment">// disable polling of stderr</span>
<a name="l00586"></a>00586 poller[STD_ERR].events = 0;
<a name="l00587"></a>00587 }
<a name="l00588"></a>00588
<a name="l00589"></a>00589 <span class="keywordflow">if</span> (num_pollers > 2) {
<a name="l00590"></a>00590 <span class="keywordflow">if</span> (poller[STD_IN].revents & ( POLLERR | POLLHUP ) ) {
<a name="l00591"></a>00591 kdDebug(5100) << <span class="stringliteral">"GnuPG seems to have hung up"</span> << endl;
<a name="l00592"></a>00592 close (pin[1]);
<a name="l00593"></a>00593 pin[1] = -1;
<a name="l00594"></a>00594 --num_pollers;
<a name="l00595"></a>00595 }
<a name="l00596"></a>00596 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (poller[STD_IN].revents & POLLOUT) {
<a name="l00597"></a>00597 <span class="keywordflow">if</span> (!input.isEmpty()) {
<a name="l00598"></a>00598 <span class="comment">// search end of next line</span>
<a name="l00599"></a>00599 <span class="keywordflow">if</span> ((len2 = input.find(<span class="charliteral">'\n'</span>, input_pos)) == -1)
<a name="l00600"></a>00600 len2 = input.length()-input_pos;
<a name="l00601"></a>00601 <span class="keywordflow">else</span>
<a name="l00602"></a>00602 len2 = len2-input_pos+1;
<a name="l00603"></a>00603
<a name="l00604"></a>00604 <span class="comment">//kdDebug(5100) << "Trying to write " << len2 << " bytes to pin[1] ..." << endl;</span>
<a name="l00605"></a>00605 len2 = write(pin[1], input.mid(input_pos,len2).data(), len2);
<a name="l00606"></a>00606 <span class="comment">//kdDebug(5100) << "Wrote " << len2 << " bytes to pin[1] ..." << endl;</span>
<a name="l00607"></a>00607 input_pos += len2;
<a name="l00608"></a>00608
<a name="l00609"></a>00609 <span class="comment">// We are done.</span>
<a name="l00610"></a>00610 <span class="keywordflow">if</span> (input_pos >= input.length()) {
<a name="l00611"></a>00611 <span class="comment">//kdDebug(5100) << "All input was written to pin[1]" << endl;</span>
<a name="l00612"></a>00612 close (pin[1]);
<a name="l00613"></a>00613 pin[1] = -1;
<a name="l00614"></a>00614 --num_pollers;
<a name="l00615"></a>00615 }
<a name="l00616"></a>00616 }
<a name="l00617"></a>00617 <span class="keywordflow">else</span> { <span class="comment">// if input.isEmpty()</span>
<a name="l00618"></a>00618 write(pin[1], <span class="stringliteral">"\n"</span>, 1);
<a name="l00619"></a>00619 <span class="comment">//kdDebug(5100) << "All input was written to pin[1]" << endl;</span>
<a name="l00620"></a>00620 close (pin[1]);
<a name="l00621"></a>00621 pin[1] = -1;
<a name="l00622"></a>00622 --num_pollers;
<a name="l00623"></a>00623 }
<a name="l00624"></a>00624 }
<a name="l00625"></a>00625 }
<a name="l00626"></a>00626 }
<a name="l00627"></a>00627 } <span class="keywordflow">while</span> ( (pollstatus > 0) && ( (num_pollers > 2)
<a name="l00628"></a>00628 || (poller[STD_OUT].events != 0)
<a name="l00629"></a>00629 || (poller[STD_ERR].events != 0) ) );
<a name="l00630"></a>00630
<a name="l00631"></a>00631 <span class="keywordflow">if</span> (pollstatus == -1) {
<a name="l00632"></a>00632 kdDebug(5100) << <span class="stringliteral">"GnuPG poll failed, errno: "</span> << errno << endl;
<a name="l00633"></a>00633 }
<a name="l00634"></a>00634
<a name="l00635"></a>00635 } <span class="keywordflow">while</span>(waitpidRetVal == 0);
<a name="l00636"></a>00636
<a name="l00637"></a>00637 <span class="keywordflow">if</span>( 0 <= pin[1] )
<a name="l00638"></a>00638 close (pin[1]);
<a name="l00639"></a>00639 close(pout[0]);
<a name="l00640"></a>00640 close(perr[0]);
<a name="l00641"></a>00641
<a name="l00642"></a>00642 <span class="keywordflow">if</span>(passphrase)
<a name="l00643"></a>00643 close(ppass[0]);
<a name="l00644"></a>00644
<a name="l00645"></a>00645 <span class="comment">// Did the child exit normally?</span>
<a name="l00646"></a>00646 <span class="keywordflow">if</span> (WIFEXITED(childExitStatus) != 0) {
<a name="l00647"></a>00647 <span class="comment">// Get the return code of the child</span>
<a name="l00648"></a>00648 childExitStatus = WEXITSTATUS(childExitStatus);
<a name="l00649"></a>00649 kdDebug(5100) << <span class="stringliteral">"GnuPG exited with exit status "</span> << childExitStatus
<a name="l00650"></a>00650 << endl;
<a name="l00651"></a>00651 }
<a name="l00652"></a>00652 <span class="keywordflow">else</span> {
<a name="l00653"></a>00653 childExitStatus = -1;
<a name="l00654"></a>00654 kdDebug(5100) << <span class="stringliteral">"GnuPG exited abnormally!"</span> << endl;
<a name="l00655"></a>00655 }
<a name="l00656"></a>00656
<a name="l00657"></a>00657 <span class="comment">//Uncomment these lines for testing only! Doing so will decrease security!</span>
<a name="l00658"></a>00658 <span class="comment">//kdDebug(5100) << "gpg stdout:\n" << QString(output) << endl;</span>
<a name="l00659"></a>00659
<a name="l00660"></a>00660 <span class="comment">// Make the information visible, so that a user can</span>
<a name="l00661"></a>00661 <span class="comment">// get to know what's going on during the gpg calls.</span>
<a name="l00662"></a>00662 kdDebug(5100) << <span class="stringliteral">"gpg stderr:\n"</span> << error << endl;
<a name="l00663"></a>00663
<a name="l00664"></a>00664 <span class="keywordflow">return</span> childExitStatus;
<a name="l00665"></a>00665 }
<a name="l00666"></a>00666
<a name="l00667"></a>00667
<a name="l00668"></a>00668 QCString
<a name="l00669"></a>00669 Base::addUserId()
<a name="l00670"></a>00670 {
<a name="l00671"></a>00671 QCString cmd;
<a name="l00672"></a>00672 QCString pgpUser = Module::getKpgp()->user();
<a name="l00673"></a>00673
<a name="l00674"></a>00674 <span class="keywordflow">if</span>(!pgpUser.isEmpty())
<a name="l00675"></a>00675 {
<a name="l00676"></a>00676 cmd += <span class="stringliteral">" -u 0x"</span>;
<a name="l00677"></a>00677 cmd += pgpUser;
<a name="l00678"></a>00678 <span class="keywordflow">return</span> cmd;
<a name="l00679"></a>00679 }
<a name="l00680"></a>00680 <span class="keywordflow">return</span> QCString();
<a name="l00681"></a>00681 }
<a name="l00682"></a>00682
<a name="l00683"></a>00683
<a name="l00684"></a>00684 } <span class="comment">// namespace Kpgp</span>
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