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tdelibs/tdeio/misc/tdesasl/tdesasl.cpp

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