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286 lines
8.0 KiB
286 lines
8.0 KiB
/* This file is part of the KDE libraries
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Copyright (C) 2001-2002 Michael Häckel <haeckel@kde.org>
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$Id$
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License version 2 as published by the Free Software Foundation.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "tdesasl.h"
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#include <kmdcodec.h>
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#include <kurl.h>
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#include <tqstrlist.h>
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#include <stdlib.h>
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#include <string.h>
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KDESasl::KDESasl(const KURL &aUrl)
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{
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mProtocol = aUrl.protocol();
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mUser = aUrl.user();
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mPass = aUrl.pass();
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mFirst = true;
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}
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KDESasl::KDESasl(const TQString &aUser, const TQString &aPass,
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const TQString &aProtocol)
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{
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mProtocol = aProtocol;
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mUser = aUser;
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mPass = aPass;
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mFirst = true;
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}
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KDESasl::~KDESasl() {
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}
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TQCString KDESasl::chooseMethod(const TQStrIList aMethods)
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{
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if (aMethods.contains("DIGEST-MD5")) mMethod = "DIGEST-MD5";
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else if (aMethods.contains("CRAM-MD5")) mMethod = "CRAM-MD5";
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else if (aMethods.contains("PLAIN")) mMethod = "PLAIN";
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else if (aMethods.contains("LOGIN")) mMethod = "LOGIN";
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else mMethod = TQCString();
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return mMethod;
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}
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void KDESasl::setMethod(const TQCString &aMethod)
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{
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mMethod = aMethod.upper();
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}
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TQByteArray KDESasl::getPlainResponse()
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{
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TQCString user = mUser.utf8();
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TQCString pass = mPass.utf8();
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int userlen = user.length();
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int passlen = pass.length();
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// result = $user\0$user\0$pass (no trailing \0)
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TQByteArray result(2 * userlen + passlen + 2);
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if ( userlen ) {
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memcpy( result.data(), user.data(), userlen );
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memcpy( result.data() + userlen + 1, user.data(), userlen );
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}
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if ( passlen )
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memcpy( result.data() + 2 * userlen + 2, pass.data(), passlen );
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result[userlen] = result[2*userlen+1] = '\0';
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return result;
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}
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TQByteArray KDESasl::getLoginResponse()
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{
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TQByteArray result = (mFirst) ? mUser.utf8() : mPass.utf8();
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mFirst = !mFirst;
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if (result.size()) result.resize(result.size() - 1);
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return result;
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}
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TQByteArray KDESasl::getCramMd5Response(const TQByteArray &aChallenge)
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{
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uint i;
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TQByteArray secret = mPass.utf8();
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int len = mPass.utf8().length();
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secret.resize(len);
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if (secret.size() > 64)
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{
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KMD5 md5(secret);
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secret.duplicate((const char*)(&(md5.rawDigest()[0])), 16);
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len = 16;
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}
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secret.resize(64);
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for (i = len; i < 64; i++) secret[i] = 0;
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TQByteArray XorOpad(64);
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for (i = 0; i < 64; i++) XorOpad[i] = secret[i] ^ 0x5C;
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TQByteArray XorIpad(64);
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for (i = 0; i < 64; i++) XorIpad[i] = secret[i] ^ 0x36;
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KMD5 md5;
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md5.update(XorIpad);
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md5.update(aChallenge);
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KMD5 md5a;
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md5a.update(XorOpad);
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md5a.update(md5.rawDigest(), 16);
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TQByteArray result = mUser.utf8();
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len = mUser.utf8().length();
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result.resize(len + 33);
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result[len] = ' ';
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TQCString ch = md5a.hexDigest();
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for (i = 0; i < 32; i++) result[i+len+1] = *(ch.data() + i);
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return result;
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}
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TQByteArray KDESasl::getDigestMd5Response(const TQByteArray &aChallenge)
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{
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mFirst = !mFirst;
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if (mFirst) return TQByteArray();
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TQCString str, realm, nonce, qop, algorithm, charset;
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TQCString nc = "00000001";
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unsigned int a, b, c, d;
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a = 0;
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while (a < aChallenge.size())
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{
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b = a;
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while (b < aChallenge.size() && aChallenge[b] != '=') b++;
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c = b + 1;
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if (aChallenge[c] == '"')
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{
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d = c + 1;
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while (d < aChallenge.size() && aChallenge[d] != '"') d++;
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c++;
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} else {
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d = c;
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while (d < aChallenge.size() && aChallenge[d] != ',') d++;
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}
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str = TQCString(aChallenge.data() + c, d - c + 1);
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if (qstrnicmp(aChallenge.data() + a, "realm=", 6) == 0) realm = str;
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else if (qstrnicmp(aChallenge.data() + a, "nonce=", 6) == 0) nonce = str;
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else if (qstrnicmp(aChallenge.data() + a, "qop=", 4) == 0) qop = str;
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else if (qstrnicmp(aChallenge.data() + a, "algorithm=", 10) == 0)
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algorithm = str;
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else if (qstrnicmp(aChallenge.data() + a, "charset=", 8) == 0)
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charset = str;
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a = (d < aChallenge.size() && aChallenge[d] == '"') ? d + 2 : d + 1;
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}
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if (qop.isEmpty()) qop = "auth";
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qop = "auth";
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bool utf8 = qstricmp(charset, "utf-8") == 0;
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TQCString digestUri = TQCString(mProtocol.latin1()) + "/" + realm;
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/* Calculate the response */
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/* Code based on code from the http io-slave
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Copyright (C) 2000,2001 Dawit Alemayehu <adawit@kde.org>
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Copyright (C) 2000,2001 Waldo Bastian <bastian@kde.org>
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Copyright (C) 2000,2001 George Staikos <staikos@kde.org> */
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KMD5 md, md2;
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TQCString HA1, HA2;
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TQCString cnonce;
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cnonce.setNum((1 + static_cast<int>(100000.0*rand()/(RAND_MAX+1.0))));
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cnonce = KCodecs::base64Encode( cnonce );
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// Calculate H(A1)
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TQCString authStr = (utf8) ? mUser.utf8() : TQCString(mUser.latin1());
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authStr += ':';
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authStr += realm;
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authStr += ':';
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authStr += (utf8) ? mPass.utf8() : TQCString(mPass.latin1());
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md.update( authStr );
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authStr = "";
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if ( algorithm == "md5-sess" )
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{
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authStr += ':';
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authStr += nonce;
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authStr += ':';
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authStr += cnonce;
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}
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md2.reset();
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/* SASL authentication uses rawDigest here, whereas HTTP authentication uses
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hexDigest() */
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md2.update(md.rawDigest(), 16);
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md2.update( authStr );
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md2.hexDigest( HA1 );
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// Calcualte H(A2)
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authStr = "AUTHENTICATE:";
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authStr += digestUri;
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if ( qop == "auth-int" || qop == "auth-conf" )
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{
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authStr += ":00000000000000000000000000000000";
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}
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md.reset();
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md.update( authStr );
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md.hexDigest( HA2 );
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// Calcualte the response.
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authStr = HA1;
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authStr += ':';
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authStr += nonce;
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authStr += ':';
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if ( !qop.isEmpty() )
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{
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authStr += nc;
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authStr += ':';
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authStr += cnonce;
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authStr += ':';
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authStr += qop;
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authStr += ':';
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}
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authStr += HA2;
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md.reset();
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md.update( authStr );
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TQCString response = md.hexDigest();
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/* End of response calculation */
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TQCString result;
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if (utf8)
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{
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result = "charset=utf-8,username=\"" + mUser.utf8();
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} else {
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result = "charset=iso-8859-1,username=\"" + TQCString(mUser.latin1());
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}
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result += "\",realm=\"" + realm + "\",nonce=\"" + nonce;
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result += "\",nc=" + nc + ",cnonce=\"" + cnonce;
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result += "\",digest-uri=\"" + digestUri;
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result += "\",response=" + response + ",qop=" + qop;
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TQByteArray ba;
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ba.duplicate(result.data(), result.length());
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return ba;
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}
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TQByteArray KDESasl::getBinaryResponse(const TQByteArray &aChallenge, bool aBase64)
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{
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if (aBase64)
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{
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TQByteArray ba;
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KCodecs::base64Decode(aChallenge, ba);
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KCodecs::base64Encode(getBinaryResponse(ba, false), ba);
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return ba;
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}
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if (qstricmp(mMethod, "PLAIN") == 0) return getPlainResponse();
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if (qstricmp(mMethod, "LOGIN") == 0) return getLoginResponse();
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if (qstricmp(mMethod, "CRAM-MD5") == 0)
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return getCramMd5Response(aChallenge);
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if (qstricmp(mMethod, "DIGEST-MD5") == 0)
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return getDigestMd5Response(aChallenge);
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// return getDigestMd5Response(TQCString("realm=\"elwood.innosoft.com\",nonce=\"OA6MG9tEQGm2hh\",qop=\"auth\",algorithm=md5-sess,charset=utf-8"));
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return TQByteArray();
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}
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TQCString KDESasl::getResponse(const TQByteArray &aChallenge, bool aBase64)
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{
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TQByteArray ba = getBinaryResponse(aChallenge, aBase64);
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return TQCString(ba.data(), ba.size() + 1);
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}
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TQCString KDESasl::method() const {
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return mMethod;
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}
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bool KDESasl::clientStarts() const {
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return method() == "PLAIN";
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}
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bool KDESasl::dialogComplete( int n ) const {
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if ( method() == "PLAIN" || method() == "CRAM-MD5" )
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return n >= 1;
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if ( method() == "LOGIN" || method() == "DIGEST-MD5" )
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return n >= 2;
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return true;
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}
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bool KDESasl::isClearTextMethod() const {
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return method() == "PLAIN" || method() == "LOGIN" ;
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}
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