?? dsatest.java
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* J.2.1, Page 100, ECDSA over the field F2m<br> * an example with 191 bit binary field */ private void testECDSA239bitBinary() throws Exception { BigInteger r = new BigInteger("21596333210419611985018340039034612628818151486841789642455876922391552"); BigInteger s = new BigInteger("197030374000731686738334997654997227052849804072198819102649413465737174"); byte[] kData = BigIntegers.asUnsignedByteArray(new BigInteger("171278725565216523967285789236956265265265235675811949404040041670216363")); SecureRandom k = new FixedSecureRandom(kData); ECCurve curve = new ECCurve.F2m( 239, // m 36, // k new BigInteger("32010857077C5431123A46B808906756F543423E8D27877578125778AC76", 16), // a new BigInteger("790408F2EEDAF392B012EDEFB3392F30F4327C0CA3F31FC383C422AA8C16", 16)); // b ECParameterSpec params = new ECParameterSpec( curve, curve.decodePoint(Hex.decode("0457927098FA932E7C0A96D3FD5B706EF7E5F5C156E16B7E7C86038552E91D61D8EE5077C33FECF6F1A16B268DE469C3C7744EA9A971649FC7A9616305")), // G new BigInteger("220855883097298041197912187592864814557886993776713230936715041207411783"), // n BigInteger.valueOf(4)); // h ECPrivateKeySpec priKeySpec = new ECPrivateKeySpec( new BigInteger("145642755521911534651321230007534120304391871461646461466464667494947990"), // d params); ECPublicKeySpec pubKeySpec = new ECPublicKeySpec( curve.decodePoint(Hex.decode("045894609CCECF9A92533F630DE713A958E96C97CCB8F5ABB5A688A238DEED6DC2D9D0C94EBFB7D526BA6A61764175B99CB6011E2047F9F067293F57F5")), // Q params); Signature sgr = Signature.getInstance("ECDSA", "BC"); KeyFactory f = KeyFactory.getInstance("ECDSA", "BC"); PrivateKey sKey = f.generatePrivate(priKeySpec); PublicKey vKey = f.generatePublic(pubKeySpec); byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' }; sgr.initSign(sKey, k); sgr.update(message); byte[] sigBytes = sgr.sign(); sgr.initVerify(vKey); sgr.update(message); if (!sgr.verify(sigBytes)) { fail("239 Bit EC verification failed"); } BigInteger[] sig = derDecode(sigBytes); if (!r.equals(sig[0])) { fail("r component wrong." + System.getProperty("line.separator") + " expecting: " + r + System.getProperty("line.separator") + " got : " + sig[0]); } if (!s.equals(sig[1])) { fail("s component wrong." + System.getProperty("line.separator") + " expecting: " + s + System.getProperty("line.separator") + " got : " + sig[1]); } } private void testGeneration() throws Exception { Signature s = Signature.getInstance("DSA", "BC"); KeyPairGenerator g = KeyPairGenerator.getInstance("DSA", "BC"); byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 }; g.initialize(512, new SecureRandom()); KeyPair p = g.generateKeyPair(); PrivateKey sKey = p.getPrivate(); PublicKey vKey = p.getPublic(); s.initSign(sKey); s.update(data); byte[] sigBytes = s.sign(); s = Signature.getInstance("DSA", "BC"); s.initVerify(vKey); s.update(data); if (!s.verify(sigBytes)) { fail("DSA verification failed"); } // // ECDSA Fp generation test // s = Signature.getInstance("ECDSA", "BC"); g = KeyPairGenerator.getInstance("ECDSA", "BC"); ECCurve curve = new ECCurve.Fp( new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b ECParameterSpec ecSpec = new ECParameterSpec( curve, curve.decodePoint(Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n g.initialize(ecSpec, new SecureRandom()); p = g.generateKeyPair(); sKey = p.getPrivate(); vKey = p.getPublic(); s.initSign(sKey); s.update(data); sigBytes = s.sign(); s = Signature.getInstance("ECDSA", "BC"); s.initVerify(vKey); s.update(data); if (!s.verify(sigBytes)) { fail("ECDSA verification failed"); } // // ECDSA F2m generation test // s = Signature.getInstance("ECDSA", "BC"); g = KeyPairGenerator.getInstance("ECDSA", "BC"); curve = new ECCurve.F2m( 239, // m 36, // k new BigInteger("32010857077C5431123A46B808906756F543423E8D27877578125778AC76", 16), // a new BigInteger("790408F2EEDAF392B012EDEFB3392F30F4327C0CA3F31FC383C422AA8C16", 16)); // b ecSpec = new ECParameterSpec( curve, curve.decodePoint(Hex.decode("0457927098FA932E7C0A96D3FD5B706EF7E5F5C156E16B7E7C86038552E91D61D8EE5077C33FECF6F1A16B268DE469C3C7744EA9A971649FC7A9616305")), // G new BigInteger("220855883097298041197912187592864814557886993776713230936715041207411783"), // n BigInteger.valueOf(4)); // h g.initialize(ecSpec, new SecureRandom()); p = g.generateKeyPair(); sKey = p.getPrivate(); vKey = p.getPublic(); s.initSign(sKey); s.update(data); sigBytes = s.sign(); s = Signature.getInstance("ECDSA", "BC"); s.initVerify(vKey); s.update(data); if (!s.verify(sigBytes)) { fail("ECDSA verification failed"); } } private void testParameters() throws Exception { AlgorithmParameterGenerator a = AlgorithmParameterGenerator.getInstance("DSA", "BC"); a.init(512, random); AlgorithmParameters params = a.generateParameters(); byte[] encodeParams = params.getEncoded(); AlgorithmParameters a2 = AlgorithmParameters.getInstance("DSA", "BC"); a2.init(encodeParams); // a and a2 should be equivalent! byte[] encodeParams_2 = a2.getEncoded(); if (!areEqual(encodeParams, encodeParams_2)) { fail("encode/decode parameters failed"); } DSAParameterSpec dsaP = (DSAParameterSpec)params.getParameterSpec(DSAParameterSpec.class); KeyPairGenerator g = KeyPairGenerator.getInstance("DSA", "BC"); g.initialize(dsaP, new SecureRandom()); KeyPair p = g.generateKeyPair(); PrivateKey sKey = p.getPrivate(); PublicKey vKey = p.getPublic(); Signature s = Signature.getInstance("DSA", "BC"); byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 }; s.initSign(sKey); s.update(data); byte[] sigBytes = s.sign(); s = Signature.getInstance("DSA", "BC"); s.initVerify(vKey); s.update(data); if (!s.verify(sigBytes)) { fail("DSA verification failed"); } } public void performTest() throws Exception { testCompat(); testECDSA239bitPrime(); testECDSA239bitBinary(); testGeneration(); testParameters(); } protected BigInteger[] derDecode( byte[] encoding) throws IOException { ByteArrayInputStream bIn = new ByteArrayInputStream(encoding); ASN1InputStream aIn = new ASN1InputStream(bIn); ASN1Sequence s = (ASN1Sequence)aIn.readObject(); BigInteger[] sig = new BigInteger[2]; sig[0] = ((DERInteger)s.getObjectAt(0)).getValue(); sig[1] = ((DERInteger)s.getObjectAt(1)).getValue(); return sig; } public String getName() { return "DSA/ECDSA"; } public static void main( String[] args) { Security.addProvider(new BouncyCastleProvider()); runTest(new DSATest()); }}?? 快捷鍵說明
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