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package org.spongycastle.pqc.crypto.test;
import junit.framework.TestCase;
/**
* @deprecated algorithm no longer safe.
*/
public class NTRUSignerTest
extends TestCase
{
public void testStub()
{
}
/*
public void testCreateBasis()
{
for (NTRUSigningKeyGenerationParameters params : new NTRUSigningKeyGenerationParameters[]{NTRUSigningKeyGenerationParameters.TEST157.clone(), NTRUSigningKeyGenerationParameters.TEST157_PROD.clone()})
{
testCreateBasis(params);
}
}
private void testCreateBasis(NTRUSigningKeyGenerationParameters params)
{
NTRUSigningKeyPairGenerator ntru = new NTRUSigningKeyPairGenerator();
ntru.init(params);
NTRUSigningKeyPairGenerator.FGBasis basis = (NTRUSigningKeyPairGenerator.FGBasis)ntru.generateBoundedBasis();
assertTrue(equalsQ(basis.f, basis.fPrime, basis.F, basis.G, params.q, params.N));
// test KeyGenAlg.FLOAT (default=RESULTANT)
params.keyGenAlg = NTRUSigningKeyGenerationParameters.KEY_GEN_ALG_FLOAT;
ntru.init(params);
basis = (NTRUSigningKeyPairGenerator.FGBasis)ntru.generateBoundedBasis();
assertTrue(equalsQ(basis.f, basis.fPrime, basis.F, basis.G, params.q, params.N));
}
// verifies that f*G-g*F=q
private boolean equalsQ(Polynomial f, Polynomial g, IntegerPolynomial F, IntegerPolynomial G, int q, int N)
{
IntegerPolynomial x = f.mult(G);
x.sub(g.mult(F));
boolean equalsQ = true;
for (int i = 1; i < x.coeffs.length; i++)
{
equalsQ &= x.coeffs[i] == 0;
}
equalsQ &= x.coeffs[0] == q;
return equalsQ;
}
/**
* a test for the one-method-call variants: sign(byte, SignatureKeyPair) and verify(byte[], byte[], SignatureKeyPair)
*
public void testSignVerify157()
throws IOException
{
for (NTRUSigningKeyGenerationParameters params : new NTRUSigningKeyGenerationParameters[]{NTRUSigningKeyGenerationParameters.TEST157.clone(), NTRUSigningKeyGenerationParameters.TEST157_PROD.clone(), NTRUSigningKeyGenerationParameters.APR2011_439.clone(), NTRUSigningKeyGenerationParameters.APR2011_439_PROD.clone(), NTRUSigningKeyGenerationParameters.APR2011_743.clone(), NTRUSigningKeyGenerationParameters.APR2011_743_PROD.clone()})
{
testSignVerify(params);
}
}
public void testSignVerify439()
throws IOException
{
for (NTRUSigningKeyGenerationParameters params : new NTRUSigningKeyGenerationParameters[]{NTRUSigningKeyGenerationParameters.APR2011_439.clone(), NTRUSigningKeyGenerationParameters.APR2011_439_PROD.clone()})
{
testSignVerify(params);
}
}
//
// public void testSignVerify743()
// throws IOException
// {
// for (NTRUSigningKeyGenerationParameters params : new NTRUSigningKeyGenerationParameters[]{NTRUSigningKeyGenerationParameters.APR2011_743.clone(), NTRUSigningKeyGenerationParameters.APR2011_743_PROD.clone()})
// {
// testSignVerify(params);
// }
// }
private void testSignVerify(NTRUSigningKeyGenerationParameters params)
throws IOException
{
NTRUSigner ntru = new NTRUSigner(params.getSigningParameters());
NTRUSigningKeyPairGenerator kGen = new NTRUSigningKeyPairGenerator();
kGen.init(params);
AsymmetricCipherKeyPair kp = kGen.generateKeyPair();
Random rng = new Random();
byte[] msg = new byte[10 + rng.nextInt(1000)];
rng.nextBytes(msg);
// sign and verify
ntru.init(true, kp.getPrivate());
ntru.update(msg, 0, msg.length);
byte[] s = ntru.generateSignature();
ntru.init(false, kp.getPublic());
ntru.update(msg, 0, msg.length);
boolean valid = ntru.verifySignature(s);
assertTrue(valid);
// altering the signature should make it invalid
s[rng.nextInt(params.N)] += 1;
ntru.init(false, kp.getPublic());
ntru.update(msg, 0, msg.length);
valid = ntru.verifySignature(s);
assertFalse(valid);
// test that a random signature fails
rng.nextBytes(s);
ntru.init(false, kp.getPublic());
ntru.update(msg, 0, msg.length);
valid = ntru.verifySignature(s);
assertFalse(valid);
// encode, decode keypair, test
NTRUSigningPrivateKeyParameters priv = new NTRUSigningPrivateKeyParameters(((NTRUSigningPrivateKeyParameters)kp.getPrivate()).getEncoded(), params);
NTRUSigningPublicKeyParameters pub = new NTRUSigningPublicKeyParameters(((NTRUSigningPublicKeyParameters)kp.getPublic()).getEncoded(), params.getSigningParameters());
kp = new AsymmetricCipherKeyPair(pub, priv);
ntru.init(true, kp.getPrivate());
ntru.update(msg, 0, msg.length);
s = ntru.generateSignature();
ntru.init(false, kp.getPublic());
ntru.update(msg, 0, msg.length);
valid = ntru.verifySignature(s);
assertTrue(valid);
// altering the signature should make it invalid
s[rng.nextInt(s.length)] += 1;
ntru.init(false, kp.getPublic());
ntru.update(msg, 0, msg.length);
valid = ntru.verifySignature(s);
assertFalse(valid);
// sparse/dense
params.sparse = !params.sparse;
ntru.init(true, kp.getPrivate());
ntru.update(msg, 0, msg.length);
s = ntru.generateSignature();
ntru.init(false, kp.getPublic());
ntru.update(msg, 0, msg.length);
valid = ntru.verifySignature(s);
assertTrue(valid);
s[rng.nextInt(s.length)] += 1;
ntru.init(false, kp.getPublic());
ntru.update(msg, 0, msg.length);
valid = ntru.verifySignature(s);
assertFalse(valid);
params.sparse = !params.sparse;
// decrease NormBound to force multiple signing attempts
NTRUSigningKeyGenerationParameters params2 = params.clone();
params2.normBoundSq *= 4.0 / 9;
params2.signFailTolerance = 10000;
ntru = new NTRUSigner(params2.getSigningParameters());
ntru.init(true, kp.getPrivate());
ntru.update(msg, 0, msg.length);
s = ntru.generateSignature();
ntru.init(false, kp.getPublic());
ntru.update(msg, 0, msg.length);
valid = ntru.verifySignature(s);
assertTrue(valid);
// test KeyGenAlg.FLOAT (default=RESULTANT)
params2 = params.clone();
params.keyGenAlg = NTRUSigningKeyGenerationParameters.KEY_GEN_ALG_FLOAT;
ntru = new NTRUSigner(params.getSigningParameters());
kGen.init(params);
kp = kGen.generateKeyPair();
ntru.init(true, kp.getPrivate());
ntru.update(msg, 0, msg.length);
s = ntru.generateSignature();
ntru.init(false, kp.getPublic());
ntru.update(msg, 0, msg.length);
valid = ntru.verifySignature(s);
assertTrue(valid);
s[rng.nextInt(s.length)] += 1;
ntru.init(false, kp.getPublic());
ntru.update(msg, 0, msg.length);
valid = ntru.verifySignature(s);
assertFalse(valid);
}
/**
* test for the initSign/update/sign and initVerify/update/verify variant
*
public void testInitUpdateSign()
{
for (NTRUSigningKeyGenerationParameters params : new NTRUSigningKeyGenerationParameters[]{NTRUSigningKeyGenerationParameters.TEST157.clone(), NTRUSigningKeyGenerationParameters.TEST157_PROD.clone()})
{
testInitUpdateSign(params);
}
}
private void testInitUpdateSign(NTRUSigningKeyGenerationParameters params)
{
NTRUSigner ntru = new NTRUSigner(params.getSigningParameters());
NTRUSigningKeyPairGenerator kGen = new NTRUSigningKeyPairGenerator();
kGen.init(params);
AsymmetricCipherKeyPair kp = kGen.generateKeyPair();
Random rng = new Random();
byte[] msg = new byte[10 + rng.nextInt(1000)];
rng.nextBytes(msg);
// sign and verify a message in two pieces each
ntru.init(true, kp.getPrivate());
int splitIdx = rng.nextInt(msg.length);
ntru.update(msg[0]); // first byte
ntru.update(msg, 1, splitIdx - 1); // part 1 of msg
ntru.update(msg, splitIdx, msg.length - splitIdx);
byte[] s = ntru.generateSignature(); // part 2 of msg
ntru.init(false, kp.getPublic());
splitIdx = rng.nextInt(msg.length);
ntru.update(msg, 0, splitIdx); // part 1 of msg
ntru.update(msg, splitIdx, msg.length - splitIdx); // part 2 of msg
boolean valid = ntru.verifySignature(s);
assertTrue(valid);
// verify the same signature with the one-step method
ntru.init(false, (NTRUSigningPublicKeyParameters)kp.getPublic());
ntru.update(msg, 0, msg.length); // part 1 of msg
valid = ntru.verifySignature(s);
assertTrue(valid);
// sign using the one-step method and verify using the multi-step method
ntru.init(true, kp.getPrivate());
ntru.update(msg, 0, msg.length);
s = ntru.generateSignature();
ntru.init(false, (NTRUSigningPublicKeyParameters)kp.getPublic());
splitIdx = rng.nextInt(msg.length);
ntru.update(msg, 0, splitIdx); // part 1 of msg
ntru.update(msg, splitIdx, msg.length - splitIdx); // part 2 of msg
valid = ntru.verifySignature(s);
assertTrue(valid);
}
public void testCreateMsgRep()
{
for (NTRUSigningKeyGenerationParameters params : new NTRUSigningKeyGenerationParameters[]{NTRUSigningKeyGenerationParameters.TEST157.clone(), NTRUSigningKeyGenerationParameters.TEST157_PROD.clone()})
{
testCreateMsgRep(params);
}
}
private void testCreateMsgRep(NTRUSigningKeyGenerationParameters params)
{
VisibleNTRUSigner ntru = new VisibleNTRUSigner(params.getSigningParameters());
byte[] msgHash = "adfsadfsdfs23234234".getBytes();
// verify that the message representative is reproducible
IntegerPolynomial i1 = ntru.createMsgRep(msgHash, 1);
IntegerPolynomial i2 = ntru.createMsgRep(msgHash, 1);
assertTrue(Arrays.areEqual(i1.coeffs, i2.coeffs));
i1 = ntru.createMsgRep(msgHash, 5);
i2 = ntru.createMsgRep(msgHash, 5);
assertTrue(Arrays.areEqual(i1.coeffs, i2.coeffs));
i1 = ntru.createMsgRep(msgHash, 2);
i2 = ntru.createMsgRep(msgHash, 3);
assertFalse(Arrays.areEqual(i1.coeffs, i2.coeffs));
}
private class VisibleNTRUSigner
extends NTRUSigner
{
/**
* Constructs a new instance with a set of signature parameters.
*
* @param params signature parameters
*
public VisibleNTRUSigner(NTRUSigningParameters params)
{
super(params);
}
public IntegerPolynomial createMsgRep(byte[] hash, int i)
{
return super.createMsgRep(hash, i);
}
}
*/
}
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