List of usage examples for org.bouncycastle.crypto.generators DSAKeyPairGenerator init
public void init(KeyGenerationParameters param)
From source file:com.geoxp.oss.CryptoHelperTest.java
License:Apache License
@Test public void testSSHSignatureBlobSign_DSA() throws Exception { DSAKeyPairGenerator dsakpg = new DSAKeyPairGenerator(); DSAParametersGenerator dpg = new DSAParametersGenerator(); dpg.init(1024, 8, new SecureRandom()); DSAParameters dsaparams = dpg.generateParameters(); DSAKeyGenerationParameters params = new DSAKeyGenerationParameters(new SecureRandom(), dsaparams); dsakpg.init(params); AsymmetricCipherKeyPair kp = dsakpg.generateKeyPair(); DSAPrivateKeyParameters privParams = (DSAPrivateKeyParameters) kp.getPrivate(); DSAPublicKeyParameters pubParams = (DSAPublicKeyParameters) kp.getPublic(); KeySpec ks = new DSAPrivateKeySpec(privParams.getX(), privParams.getParameters().getP(), privParams.getParameters().getQ(), privParams.getParameters().getG()); PrivateKey priv = KeyFactory.getInstance("DSA").generatePrivate(ks); ks = new DSAPublicKeySpec(pubParams.getY(), pubParams.getParameters().getP(), pubParams.getParameters().getQ(), pubParams.getParameters().getG()); PublicKey pub = KeyFactory.getInstance("DSA").generatePublic(ks); byte[] data = PLAINTEXT.getBytes(); byte[] sig = CryptoHelper.sshSignatureBlobSign(data, priv); Assert.assertTrue(CryptoHelper.sshSignatureBlobVerify(data, sig, pub)); }
From source file:dorkbox.util.crypto.CryptoDSA.java
License:Apache License
/** * Generates the DSA key (using RSA and SHA1) * <p/>//from ww w . java 2 s . com * Note: this is here just for keeping track of how this is done. This should NOT be used, and instead use ECC crypto. */ public static AsymmetricCipherKeyPair generateKeyPair(SecureRandom secureRandom, int keyLength) { DSAKeyPairGenerator keyGen = new DSAKeyPairGenerator(); DSAParametersGenerator dsaParametersGenerator = new DSAParametersGenerator(); dsaParametersGenerator.init(keyLength, 20, secureRandom); DSAParameters generateParameters = dsaParametersGenerator.generateParameters(); DSAKeyGenerationParameters params = new DSAKeyGenerationParameters(secureRandom, generateParameters); keyGen.init(params); return keyGen.generateKeyPair(); }