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/* TestOfSRPPrimitives.java --
Copyright (C) 2006 Free Software Foundation, Inc.
This file is part of Mauve.
Mauve is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
Mauve is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with Mauve; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
*/
// Tags: GNU-CRYPTO JDK1.4
package gnu.testlet.gnu.javax.crypto.sasl.srp;
import gnu.java.security.hash.IMessageDigest;
import gnu.java.security.key.IKeyPairGenerator;
import gnu.java.security.util.Util;
import gnu.javax.crypto.key.srp6.SRPKeyPairGenerator;
import gnu.javax.crypto.key.srp6.SRPPrivateKey;
import gnu.javax.crypto.key.srp6.SRPPublicKey;
import gnu.javax.crypto.sasl.srp.PasswordFile;
import gnu.javax.crypto.sasl.srp.SRP;
import gnu.javax.crypto.sasl.srp.SRPRegistry;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import java.io.File;
import java.io.IOException;
import java.math.BigInteger;
import java.security.KeyPair;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Random;
/**
* Regression tests for SRP cryptographic primitives.
*/
public class TestOfSRPPrimitives implements Testlet
{
private String user = "TestOfSRPPrimitives";
private String password = "secret";
private String pFile = "./__TestOfSRPPrimitives";
private String p2File = pFile + "2";
private String cFile = pFile + ".conf";
private PasswordFile tpasswd;
private Random prng = new Random();
public void test(TestHarness harness)
{
harness.checkPoint("setting up the test");
try
{
File f = new File(pFile);
if (!f.exists())
{
if (f.createNewFile())
f.deleteOnExit();
}
else if (!f.isFile())
{
throw new RuntimeException("File object " + pFile
+ " exists but is not a file");
}
else if (!f.canRead() || !f.canWrite())
{
throw new RuntimeException("File " + pFile
+ " exists but is not accessible");
}
tpasswd = new PasswordFile(pFile, p2File, cFile);
if (!tpasswd.contains(user))
{
byte[] testSalt = new byte[10];
prng.nextBytes(testSalt);
tpasswd.add(user, password, testSalt, "1");
}
else
{
tpasswd.changePasswd(user, password);
}
for (int i = 0; i < SRPRegistry.SRP_ALGORITHMS.length; i++)
{
exerciseAlgorithm(harness,
SRP.instance(SRPRegistry.SRP_ALGORITHMS[i]));
}
}
catch (IOException x)
{
harness.debug(x);
harness.fail("TestOfSRPPrimitives");
}
finally
{
try
{
new File(pFile).delete(); // remove test file
}
catch (Exception ignored)
{
}
try
{
new File(p2File).delete(); // remove test2 file
}
catch (Exception ignored)
{
}
try
{
new File(cFile).delete(); // remove test.conf file
}
catch (Exception ignored)
{
}
}
}
private void exerciseAlgorithm(TestHarness harness, SRP srp)
{
harness.checkPoint("TestOfSRPPrimitives.exerciseAlgorithm("
+ srp.getAlgorithm() + ")");
try
{
String[] entry = tpasswd.lookup(user, srp.getAlgorithm());
BigInteger v = new BigInteger(1, Util.fromBase64(entry[0]));
byte[] s = Util.fromBase64(entry[1]);
String[] mpi = tpasswd.lookupConfig(entry[2]);
BigInteger N = new BigInteger(1, Util.fromBase64(mpi[0]));
BigInteger g = new BigInteger(1, Util.fromBase64(mpi[1]));
IKeyPairGenerator kpg = new SRPKeyPairGenerator();
HashMap attributes = new HashMap();
attributes.put(SRPKeyPairGenerator.SHARED_MODULUS, N);
attributes.put(SRPKeyPairGenerator.GENERATOR, g);
kpg.setup(attributes);
KeyPair clientKP = kpg.generate();
BigInteger A = ((SRPPublicKey) clientKP.getPublic()).getY();
BigInteger a = ((SRPPrivateKey) clientKP.getPrivate()).getX();
attributes.put(SRPKeyPairGenerator.USER_VERIFIER, v);
kpg.setup(attributes);
KeyPair serverKP = kpg.generate();
BigInteger B = ((SRPPublicKey) serverKP.getPublic()).getY();
BigInteger b = ((SRPPrivateKey) serverKP.getPrivate()).getX();
// compute u = H(A | B)
IMessageDigest hash = srp.newDigest();
byte[] buffy;
buffy = Util.trim(A);
hash.update(buffy, 0, buffy.length);
buffy = Util.trim(B);
hash.update(buffy, 0, buffy.length);
BigInteger u = new BigInteger(1, hash.digest());
// compute S = ((A * (v ** u)) ** b) % N
BigInteger S1 = A.multiply(v.modPow(u, N)).modPow(b, N);
// compute K = H(S) (as of rev 08)
byte[] s1Bytes = Util.trim(S1);
hash.update(s1Bytes, 0, s1Bytes.length);
byte[] K1 = hash.digest();
BigInteger x = new BigInteger(1, srp.computeX(s, user, password));
// compute S = ((B - (3 * (g ** x))) ** (a + (u * x))) % N
// compute S = ((B - (3 * v)) ** (a + (u * x))) % N
BigInteger S2 =
B.subtract(BigInteger.valueOf(3L).multiply(v))
.modPow(a.add(u.multiply(x)), N);
// compute K = H(S) (as of rev 08)
byte[] s2Bytes = Util.trim(S2);
hash.update(s2Bytes, 0, s2Bytes.length);
byte[] K2 = hash.digest();
harness.check(Arrays.equals(K1, K2)); // #1,4,7,10
// ===================================================================
String L = "ALSM=IE,Slsd=fi4fg_;asdg_gsdfmof"; // available options
String o = "KLK=FSOIIOAS,Oiasf,oaa=sdin_;asd"; // chosen options
byte[] sid = "abc".getBytes();
int ttl = 23;
byte[] cIV = new byte[16];
byte[] sIV = new byte[16];
byte[] sCB = "host.acme.com".getBytes();
byte[] cCB = "user@acme.com".getBytes();
byte[] cn = "client".getBytes();
byte[] sn = "server".getBytes();
prng.nextBytes(cIV);
prng.nextBytes(sIV);
byte[] cM1 = srp.generateM1(N, g, user, s, A, B, K1, user, L, cn, cCB);
byte[] cM2 =
srp.generateM2(A, cM1, K1, user, user, o, sid, ttl, cIV, sIV, sCB);
byte[] sM1 = srp.generateM1(N, g, user, s, A, B, K2, user, L, cn, cCB);
byte[] sM2 =
srp.generateM2(A, sM1, K2, user, user, o, sid, ttl, cIV, sIV, sCB);
harness.check(Arrays.equals(cM1, sM1)); // #2,5,8,11
harness.check(Arrays.equals(cM2, sM2)); // #3,6,9,12
}
catch (Exception x)
{
harness.debug(x);
harness.fail("TestOfSRPPrimitives.exerciseAlgorithm("
+ srp.getAlgorithm() + ")");
}
}
}
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