diff options
Diffstat (limited to 'libraries/spongycastle/core/src/test/java/org/spongycastle/crypto/ec/test/ECTransformationTest.java')
-rw-r--r-- | libraries/spongycastle/core/src/test/java/org/spongycastle/crypto/ec/test/ECTransformationTest.java | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/libraries/spongycastle/core/src/test/java/org/spongycastle/crypto/ec/test/ECTransformationTest.java b/libraries/spongycastle/core/src/test/java/org/spongycastle/crypto/ec/test/ECTransformationTest.java deleted file mode 100644 index 31c66469b..000000000 --- a/libraries/spongycastle/core/src/test/java/org/spongycastle/crypto/ec/test/ECTransformationTest.java +++ /dev/null @@ -1,145 +0,0 @@ -package org.spongycastle.crypto.ec.test; - -import java.math.BigInteger; -import java.security.SecureRandom; - -import org.spongycastle.crypto.AsymmetricCipherKeyPair; -import org.spongycastle.crypto.ec.ECDecryptor; -import org.spongycastle.crypto.ec.ECElGamalDecryptor; -import org.spongycastle.crypto.ec.ECElGamalEncryptor; -import org.spongycastle.crypto.ec.ECEncryptor; -import org.spongycastle.crypto.ec.ECNewPublicKeyTransform; -import org.spongycastle.crypto.ec.ECNewRandomnessTransform; -import org.spongycastle.crypto.ec.ECPair; -import org.spongycastle.crypto.ec.ECPairTransform; -import org.spongycastle.crypto.generators.ECKeyPairGenerator; -import org.spongycastle.crypto.params.ECDomainParameters; -import org.spongycastle.crypto.params.ECKeyGenerationParameters; -import org.spongycastle.crypto.params.ECPrivateKeyParameters; -import org.spongycastle.crypto.params.ECPublicKeyParameters; -import org.spongycastle.crypto.params.ParametersWithRandom; -import org.spongycastle.math.ec.ECCurve; -import org.spongycastle.math.ec.ECPoint; -import org.spongycastle.util.encoders.Hex; -import org.spongycastle.util.test.SimpleTest; - -public class ECTransformationTest - extends SimpleTest -{ - public String getName() - { - return "ECTransformationTest"; - } - - public void performTest() - throws Exception - { - ECCurve.Fp curve = new ECCurve.Fp( - new BigInteger("6277101735386680763835789423207666416083908700390324961279"), // q - new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16), // a - new BigInteger("64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1", 16)); // b - - ECDomainParameters params = new ECDomainParameters( - curve, - curve.decodePoint(Hex.decode("03188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012")), // G - new BigInteger("6277101735386680763835789423176059013767194773182842284081")); // n - - ECPublicKeyParameters pubKey = new ECPublicKeyParameters( - curve.decodePoint(Hex.decode("0262b12d60690cdcf330babab6e69763b471f994dd702d16a5")), // Q - params); - - ECPrivateKeyParameters priKey = new ECPrivateKeyParameters( - new BigInteger("651056770906015076056810763456358567190100156695615665659"), // d - params); - - - ParametersWithRandom pRandom = new ParametersWithRandom(pubKey, new SecureRandom()); - - doTest(priKey, pRandom, BigInteger.valueOf(20)); - - BigInteger rand = new BigInteger(pubKey.getParameters().getN().bitLength() - 1, new SecureRandom()); - - doTest(priKey, pRandom, rand); - doSameKeyTest(priKey, pRandom, rand); - } - - private void doTest(ECPrivateKeyParameters priKey, ParametersWithRandom pRandom, BigInteger value) - { - ECPoint data = priKey.getParameters().getG().multiply(value); - - ECEncryptor encryptor = new ECElGamalEncryptor(); - - encryptor.init(pRandom); - - ECPair pair = encryptor.encrypt(data); - - ECKeyPairGenerator ecGen = new ECKeyPairGenerator(); - - ecGen.init(new ECKeyGenerationParameters(priKey.getParameters(), new SecureRandom())); - - AsymmetricCipherKeyPair reEncKP = ecGen.generateKeyPair(); - - ECPairTransform ecr = new ECNewPublicKeyTransform(); - - ecr.init(reEncKP.getPublic()); - - ECPair srcPair = pair; - - // re-encrypt the message portion - pair = ecr.transform(srcPair); - - ECDecryptor decryptor = new ECElGamalDecryptor(); - - decryptor.init(priKey); - - // decrypt out the original private key - ECPoint p = decryptor.decrypt(new ECPair(srcPair.getX(), pair.getY())); - - decryptor.init(reEncKP.getPrivate()); - - // decrypt the fully transformed point. - ECPoint result = decryptor.decrypt(new ECPair(pair.getX(), p)); - - if (!data.equals(result)) - { - fail("point pair failed to decrypt back to original"); - } - } - - private void doSameKeyTest(ECPrivateKeyParameters priKey, ParametersWithRandom pRandom, BigInteger value) - { - ECPoint data = priKey.getParameters().getG().multiply(value); - - ECEncryptor encryptor = new ECElGamalEncryptor(); - - encryptor.init(pRandom); - - ECPair pair = encryptor.encrypt(data); - - ECPairTransform ecr = new ECNewRandomnessTransform(); - - ecr.init(pRandom); - - ECPair srcPair = pair; - - // re-encrypt the message portion - pair = ecr.transform(srcPair); - - ECDecryptor decryptor = new ECElGamalDecryptor(); - - decryptor.init(priKey); - - // decrypt the fully transformed point. - ECPoint result = decryptor.decrypt(pair); - - if (!data.equals(result)) - { - fail("point pair failed to decrypt back to original"); - } - } - - public static void main(String[] args) - { - runTest(new ECTransformationTest()); - } -} |