public void main(Provider p) throws Exception { KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", p); kpg.initialize(512); KeyPair kp = kpg.generateKeyPair(); PrivateKey privateKey = kp.getPrivate(); PublicKey publicKey = kp.getPublic(); Signature sig = Signature.getInstance("MD5withRSA", p); byte[] data = new byte[10 * 1024]; new Random().nextBytes(data); sig.initSign(privateKey); sig.initSign(privateKey); sig.update(data); sig.initSign(privateKey); sig.update(data); byte[] signature = sig.sign(); sig.update(data); sig.initSign(privateKey); sig.update(data); sig.sign(); sig.sign(); sig.initSign(privateKey); sig.sign(); System.out.println("All tests passed"); }
public void run() { try { ObjectInputStream ois = new ObjectInputStream(s.getInputStream()); ObjectOutputStream oos = new ObjectOutputStream(s.getOutputStream()); BigInteger bg = dhSpec.getG(); BigInteger bp = dhSpec.getP(); oos.writeObject(bg); oos.writeObject(bp); KeyPairGenerator kpg = KeyPairGenerator.getInstance("DH"); kpg.initialize(1024); KeyPair kpa = (KeyPair) ois.readObject(); KeyAgreement dh = KeyAgreement.getInstance("DH"); KeyPair kp = kpg.generateKeyPair(); oos.writeObject(kp); dh.init(kp.getPrivate()); Key pk = dh.doPhase(kpa.getPublic(), true); MessageDigest sha256 = MessageDigest.getInstance("SHA-256"); byte[] rawbits = sha256.digest(dh.generateSecret()); Cipher c = Cipher.getInstance(CIPHER_MODE); SecretKey key = new SecretKeySpec(rawbits, 0, 16, "AES"); byte ivbits[] = (byte[]) ois.readObject(); IvParameterSpec iv = new IvParameterSpec(ivbits); c.init(Cipher.DECRYPT_MODE, key, iv); Mac m = Mac.getInstance("HmacSHA1"); SecretKey mackey = new SecretKeySpec(rawbits, 16, 16, "HmacSHA1"); m.init(mackey); byte ciphertext[], cleartext[], mac[]; try { while (true) { ciphertext = (byte[]) ois.readObject(); mac = (byte[]) ois.readObject(); if (Arrays.equals(mac, m.doFinal(ciphertext))) { cleartext = c.update(ciphertext); System.out.println(ct + " : " + new String(cleartext, "UTF-8")); } else { // System.exit(1); System.out.println(ct + "error"); } } } catch (EOFException e) { cleartext = c.doFinal(); System.out.println(ct + " : " + new String(cleartext, "UTF-8")); System.out.println("[" + ct + "]"); } finally { if (ois != null) ois.close(); if (oos != null) oos.close(); } } catch (Exception e) { e.printStackTrace(); } }
private static KeyPairGenerator getInstance(Instance instance, String algorithm) { KeyPairGenerator kpg; if (instance.impl instanceof KeyPairGenerator) { kpg = (KeyPairGenerator) instance.impl; } else { KeyPairGeneratorSpi spi = (KeyPairGeneratorSpi) instance.impl; kpg = new Delegate(spi, algorithm); } kpg.provider = instance.provider; return kpg; }
/** * Generates the public/private key pair from the init params * * @throws Exception */ public void initKeyPair() throws Exception { // generate keys according to the specified algorithms // generate publicKey and Private Key KeyPairGenerator KpairGen = null; if (asymProvider != null && !asymProvider.trim().isEmpty()) KpairGen = KeyPairGenerator.getInstance(getAlgorithm(asymAlgorithm), asymProvider); else KpairGen = KeyPairGenerator.getInstance(getAlgorithm(asymAlgorithm)); KpairGen.initialize(asymInit, new SecureRandom()); Kpair = KpairGen.generateKeyPair(); // set up the Cipher to decrypt secret key responses encrypted with our key if (asymProvider != null && !asymProvider.trim().isEmpty()) asymCipher = Cipher.getInstance(asymAlgorithm, asymProvider); else asymCipher = Cipher.getInstance(asymAlgorithm); asymCipher.init(Cipher.DECRYPT_MODE, Kpair.getPrivate()); log.debug("asym algo initialized"); }