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package org.whispersystems.test.ecc;
import android.test.AndroidTestCase;
import org.whispersystems.libaxolotl.InvalidKeyException;
import org.whispersystems.libaxolotl.ecc.Curve;
import org.whispersystems.libaxolotl.ecc.ECKeyPair;
import org.whispersystems.libaxolotl.ecc.ECPrivateKey;
import org.whispersystems.libaxolotl.ecc.ECPublicKey;
import java.util.Arrays;
public class Curve25519Test extends AndroidTestCase {
public void testAgreement() throws InvalidKeyException {
byte[] alicePublic = {(byte) 0x05, (byte) 0x1b, (byte) 0xb7, (byte) 0x59, (byte) 0x66,
(byte) 0xf2, (byte) 0xe9, (byte) 0x3a, (byte) 0x36, (byte) 0x91,
(byte) 0xdf, (byte) 0xff, (byte) 0x94, (byte) 0x2b, (byte) 0xb2,
(byte) 0xa4, (byte) 0x66, (byte) 0xa1, (byte) 0xc0, (byte) 0x8b,
(byte) 0x8d, (byte) 0x78, (byte) 0xca, (byte) 0x3f, (byte) 0x4d,
(byte) 0x6d, (byte) 0xf8, (byte) 0xb8, (byte) 0xbf, (byte) 0xa2,
(byte) 0xe4, (byte) 0xee, (byte) 0x28};
byte[] alicePrivate = {(byte) 0xc8, (byte) 0x06, (byte) 0x43, (byte) 0x9d, (byte) 0xc9,
(byte) 0xd2, (byte) 0xc4, (byte) 0x76, (byte) 0xff, (byte) 0xed,
(byte) 0x8f, (byte) 0x25, (byte) 0x80, (byte) 0xc0, (byte) 0x88,
(byte) 0x8d, (byte) 0x58, (byte) 0xab, (byte) 0x40, (byte) 0x6b,
(byte) 0xf7, (byte) 0xae, (byte) 0x36, (byte) 0x98, (byte) 0x87,
(byte) 0x90, (byte) 0x21, (byte) 0xb9, (byte) 0x6b, (byte) 0xb4,
(byte) 0xbf, (byte) 0x59};
byte[] bobPublic = {(byte) 0x05, (byte) 0x65, (byte) 0x36, (byte) 0x14, (byte) 0x99,
(byte) 0x3d, (byte) 0x2b, (byte) 0x15, (byte) 0xee, (byte) 0x9e,
(byte) 0x5f, (byte) 0xd3, (byte) 0xd8, (byte) 0x6c, (byte) 0xe7,
(byte) 0x19, (byte) 0xef, (byte) 0x4e, (byte) 0xc1, (byte) 0xda,
(byte) 0xae, (byte) 0x18, (byte) 0x86, (byte) 0xa8, (byte) 0x7b,
(byte) 0x3f, (byte) 0x5f, (byte) 0xa9, (byte) 0x56, (byte) 0x5a,
(byte) 0x27, (byte) 0xa2, (byte) 0x2f};
byte[] bobPrivate = {(byte) 0xb0, (byte) 0x3b, (byte) 0x34, (byte) 0xc3, (byte) 0x3a,
(byte) 0x1c, (byte) 0x44, (byte) 0xf2, (byte) 0x25, (byte) 0xb6,
(byte) 0x62, (byte) 0xd2, (byte) 0xbf, (byte) 0x48, (byte) 0x59,
(byte) 0xb8, (byte) 0x13, (byte) 0x54, (byte) 0x11, (byte) 0xfa,
(byte) 0x7b, (byte) 0x03, (byte) 0x86, (byte) 0xd4, (byte) 0x5f,
(byte) 0xb7, (byte) 0x5d, (byte) 0xc5, (byte) 0xb9, (byte) 0x1b,
(byte) 0x44, (byte) 0x66};
byte[] shared = {(byte) 0x32, (byte) 0x5f, (byte) 0x23, (byte) 0x93, (byte) 0x28,
(byte) 0x94, (byte) 0x1c, (byte) 0xed, (byte) 0x6e, (byte) 0x67,
(byte) 0x3b, (byte) 0x86, (byte) 0xba, (byte) 0x41, (byte) 0x01,
(byte) 0x74, (byte) 0x48, (byte) 0xe9, (byte) 0x9b, (byte) 0x64,
(byte) 0x9a, (byte) 0x9c, (byte) 0x38, (byte) 0x06, (byte) 0xc1,
(byte) 0xdd, (byte) 0x7c, (byte) 0xa4, (byte) 0xc4, (byte) 0x77,
(byte) 0xe6, (byte) 0x29};
ECPublicKey alicePublicKey = Curve.decodePoint(alicePublic, 0);
ECPrivateKey alicePrivateKey = Curve.decodePrivatePoint(alicePrivate);
ECPublicKey bobPublicKey = Curve.decodePoint(bobPublic, 0);
ECPrivateKey bobPrivateKey = Curve.decodePrivatePoint(bobPrivate);
byte[] sharedOne = Curve.calculateAgreement(alicePublicKey, bobPrivateKey);
byte[] sharedTwo = Curve.calculateAgreement(bobPublicKey, alicePrivateKey);
assertTrue(Arrays.equals(sharedOne, shared));
assertTrue(Arrays.equals(sharedTwo, shared));
}
public void testRandomAgreements() throws InvalidKeyException {
for (int i=0;i<50;i++) {
ECKeyPair alice = Curve.generateKeyPair();
ECKeyPair bob = Curve.generateKeyPair();
byte[] sharedAlice = Curve.calculateAgreement(bob.getPublicKey(), alice.getPrivateKey());
byte[] sharedBob = Curve.calculateAgreement(alice.getPublicKey(), bob.getPrivateKey());
assertTrue(Arrays.equals(sharedAlice, sharedBob));
}
}
public void testSignature() throws InvalidKeyException {
byte[] aliceIdentityPrivate = {(byte)0xc0, (byte)0x97, (byte)0x24, (byte)0x84, (byte)0x12,
(byte)0xe5, (byte)0x8b, (byte)0xf0, (byte)0x5d, (byte)0xf4,
(byte)0x87, (byte)0x96, (byte)0x82, (byte)0x05, (byte)0x13,
(byte)0x27, (byte)0x94, (byte)0x17, (byte)0x8e, (byte)0x36,
(byte)0x76, (byte)0x37, (byte)0xf5, (byte)0x81, (byte)0x8f,
(byte)0x81, (byte)0xe0, (byte)0xe6, (byte)0xce, (byte)0x73,
(byte)0xe8, (byte)0x65};
byte[] aliceIdentityPublic = {(byte)0x05, (byte)0xab, (byte)0x7e, (byte)0x71, (byte)0x7d,
(byte)0x4a, (byte)0x16, (byte)0x3b, (byte)0x7d, (byte)0x9a,
(byte)0x1d, (byte)0x80, (byte)0x71, (byte)0xdf, (byte)0xe9,
(byte)0xdc, (byte)0xf8, (byte)0xcd, (byte)0xcd, (byte)0x1c,
(byte)0xea, (byte)0x33, (byte)0x39, (byte)0xb6, (byte)0x35,
(byte)0x6b, (byte)0xe8, (byte)0x4d, (byte)0x88, (byte)0x7e,
(byte)0x32, (byte)0x2c, (byte)0x64};
byte[] aliceEphemeralPublic = {(byte)0x05, (byte)0xed, (byte)0xce, (byte)0x9d, (byte)0x9c,
(byte)0x41, (byte)0x5c, (byte)0xa7, (byte)0x8c, (byte)0xb7,
(byte)0x25, (byte)0x2e, (byte)0x72, (byte)0xc2, (byte)0xc4,
(byte)0xa5, (byte)0x54, (byte)0xd3, (byte)0xeb, (byte)0x29,
(byte)0x48, (byte)0x5a, (byte)0x0e, (byte)0x1d, (byte)0x50,
(byte)0x31, (byte)0x18, (byte)0xd1, (byte)0xa8, (byte)0x2d,
(byte)0x99, (byte)0xfb, (byte)0x4a};
byte[] aliceSignature = {(byte)0x5d, (byte)0xe8, (byte)0x8c, (byte)0xa9, (byte)0xa8,
(byte)0x9b, (byte)0x4a, (byte)0x11, (byte)0x5d, (byte)0xa7,
(byte)0x91, (byte)0x09, (byte)0xc6, (byte)0x7c, (byte)0x9c,
(byte)0x74, (byte)0x64, (byte)0xa3, (byte)0xe4, (byte)0x18,
(byte)0x02, (byte)0x74, (byte)0xf1, (byte)0xcb, (byte)0x8c,
(byte)0x63, (byte)0xc2, (byte)0x98, (byte)0x4e, (byte)0x28,
(byte)0x6d, (byte)0xfb, (byte)0xed, (byte)0xe8, (byte)0x2d,
(byte)0xeb, (byte)0x9d, (byte)0xcd, (byte)0x9f, (byte)0xae,
(byte)0x0b, (byte)0xfb, (byte)0xb8, (byte)0x21, (byte)0x56,
(byte)0x9b, (byte)0x3d, (byte)0x90, (byte)0x01, (byte)0xbd,
(byte)0x81, (byte)0x30, (byte)0xcd, (byte)0x11, (byte)0xd4,
(byte)0x86, (byte)0xce, (byte)0xf0, (byte)0x47, (byte)0xbd,
(byte)0x60, (byte)0xb8, (byte)0x6e, (byte)0x88};
ECPrivateKey alicePrivateKey = Curve.decodePrivatePoint(aliceIdentityPrivate);
ECPublicKey alicePublicKey = Curve.decodePoint(aliceIdentityPublic, 0);
ECPublicKey aliceEphemeral = Curve.decodePoint(aliceEphemeralPublic, 0);
if (!Curve.verifySignature(alicePublicKey, aliceEphemeral.serialize(), aliceSignature)) {
throw new AssertionError("Sig verification failed!");
}
for (int i=0;i<aliceSignature.length;i++) {
byte[] modifiedSignature = new byte[aliceSignature.length];
System.arraycopy(aliceSignature, 0, modifiedSignature, 0, modifiedSignature.length);
modifiedSignature[i] ^= 0x01;
if (Curve.verifySignature(alicePublicKey, aliceEphemeral.serialize(), modifiedSignature)) {
throw new AssertionError("Sig verification succeeded!");
}
}
}
public void testSignatureOverflow() throws InvalidKeyException {
ECKeyPair keys = Curve.generateKeyPair();
byte[] message = new byte[4096];
try {
byte[] signature = Curve.calculateSignature(keys.getPrivateKey(), message);
throw new InvalidKeyException("Should have asserted!");
} catch (AssertionError e) {
// Success!
}
}
}
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