Java ECDSASigner.init方法代码示例

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
@Override
public boolean verify(byte[] hash, byte[] signature, byte[] publicKey) {
    ASN1InputStream asn1 = new ASN1InputStream(signature);
    try {
        ECDSASigner signer = new ECDSASigner();
        signer.init(false, new ECPublicKeyParameters(curve.getCurve().decodePoint(publicKey), domain));

        DLSequence seq = (DLSequence) asn1.readObject();
        BigInteger r = ((ASN1Integer) seq.getObjectAt(0)).getPositiveValue();
        BigInteger s = ((ASN1Integer) seq.getObjectAt(1)).getPositiveValue();
        return signer.verifySignature(hash, r, s);
    } catch (Exception e) {
        return false;
    } finally {
        try {
            asn1.close();
        } catch (IOException ignored) {
        }
    }
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
@Override
public byte[] sign(byte[] hash, byte[] privateKey) {
    ECDSASigner signer = new ECDSASigner(new HMacDSAKCalculator(new SHA256Digest()));
    signer.init(true, new ECPrivateKeyParameters(new BigInteger(privateKey), domain));
    BigInteger[] signature = signer.generateSignature(hash);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    try {
        DERSequenceGenerator seq = new DERSequenceGenerator(baos);
        seq.addObject(new ASN1Integer(signature[0]));
        seq.addObject(new ASN1Integer(toCanonicalS(signature[1])));
        seq.close();
        return baos.toByteArray();
    } catch (IOException e) {
        return new byte[0];
    }
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
public static boolean verifySignature(byte[] sigR, byte sigS[], byte[] publicKey, byte[] message) {
  try {
    Security.addProvider(new BouncyCastleProvider());
    ECNamedCurveParameterSpec spec = ECNamedCurveTable.getParameterSpec(SECP256K1);
    ECDomainParameters domain = new ECDomainParameters(spec.getCurve(), spec.getG(), spec.getN());
    ECPublicKeyParameters publicKeyParams =
        new ECPublicKeyParameters(spec.getCurve().decodePoint(publicKey), domain);

    ECDSASigner signer = new ECDSASigner();
    signer.init(false, publicKeyParams);
    return signer.verifySignature(message, new BigInteger(1, sigR), new BigInteger(1, sigS));
  } catch (Exception e) {
    LOGGER.error(null, e);
    return false;
  }
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
public static boolean verifyUsingSecp256k1(byte[] pub, byte[] dataForSigning,
		BigInteger[] rs) throws Exception {
	ECDSASigner signer = new ECDSASigner();
	X9ECParameters params = SECNamedCurves.getByName("secp256k1");
	ECDomainParameters ecParams = new ECDomainParameters(params.getCurve(),
			params.getG(), params.getN(), params.getH());
	ECPublicKeyParameters pubKeyParams = new ECPublicKeyParameters(ecParams
			.getCurve().decodePoint(pub), ecParams);
	signer.init(false, pubKeyParams);

	return signer.verifySignature(dataForSigning, rs[0].abs(), rs[1].abs());
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
@Test
public void curveTest() {
    final X9ECParameters curve = NISTNamedCurves.getByName("P-384");
    final ECDomainParameters domainParameters = new ECDomainParameters(
            curve.getCurve(), curve.getG(), curve.getN());
    final SecureRandom random = new SecureRandom();
    final ECKeyPairGenerator gen = new ECKeyPairGenerator();
    gen.init(new ECKeyGenerationParameters(domainParameters, random));
    final AsymmetricCipherKeyPair senderPair = gen.generateKeyPair();
    final ECDSASigner signer = new ECDSASigner();
    signer.init(true, senderPair.getPrivate());
    final byte[] message = "The magic words are squeamish ossifrage".getBytes(
        Constants.ASCII);
    final SHA384Digest digester = new SHA384Digest();
    digester.update(message, 0, message.length);
    final byte[] digest = new byte[digester.getDigestSize()];
    digester.doFinal(digest, 0);
    final BigInteger[] signature = signer.generateSignature(digest);
    final ECDSASigner verifier = new ECDSASigner();
    verifier.init(false, senderPair.getPublic());
    assertTrue(verifier.verifySignature(digest, signature[0], signature[1]));
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
@Override
public byte[] sign (byte[] hash) throws ValidationException
{
	if ( priv == null )
	{
		throw new ValidationException ("Need private key to sign");
	}
	ECDSASigner signer = new ECDSASigner (new HMacDSAKCalculator (new SHA256Digest ()));
	signer.init (true, new ECPrivateKeyParameters (priv, domain));
	BigInteger[] signature = signer.generateSignature (hash);
	ByteArrayOutputStream s = new ByteArrayOutputStream ();
	try
	{
		DERSequenceGenerator seq = new DERSequenceGenerator (s);
		seq.addObject (new ASN1Integer (signature[0]));
		seq.addObject (new ASN1Integer (signature[1]));
		seq.close ();
		return s.toByteArray ();
	}
	catch ( IOException e )
	{
	}
	return null;
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
/**
 * key generation test
 */
private void testECDSAKeyGenTest()
{
    SecureRandom    random = new SecureRandom();
    ECCurve.Fp curve = new ECCurve.Fp(
        new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
        new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
        new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b

    ECDomainParameters params = new ECDomainParameters(
        curve,
        curve.decodePoint(Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
        new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n


    ECKeyPairGenerator          pGen = new ECKeyPairGenerator();
    ECKeyGenerationParameters   genParam = new ECKeyGenerationParameters(
                                    params,
                                    random);

    pGen.init(genParam);

    AsymmetricCipherKeyPair  pair = pGen.generateKeyPair();

    ParametersWithRandom param = new ParametersWithRandom(pair.getPrivate(), random);

    ECDSASigner ecdsa = new ECDSASigner();

    ecdsa.init(true, param);

    byte[] message = new BigInteger("968236873715988614170569073515315707566766479517").toByteArray();
    BigInteger[] sig = ecdsa.generateSignature(message);

    ecdsa.init(false, pair.getPublic());

    if (!ecdsa.verifySignature(message, sig[0], sig[1]))
    {
        fail("signature fails");
    }
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
public boolean isSignatureVerified(StellarBinaryObject serObj) {
	try {
		byte[] signatureBytes= (byte[]) serObj.getField(BinaryFormatField.TxnSignature);
		if(signatureBytes==null){
			throw new RuntimeException("The specified  has no signature");
		}
		byte[] signingPubKeyBytes = (byte[]) serObj.getField(BinaryFormatField.SigningPubKey);
		if(signingPubKeyBytes==null){
			throw new RuntimeException("The specified  has no public key associated to the signature");
		}

		StellarBinaryObject unsignedRBO = serObj.getUnsignedCopy();
		byte[] hashToVerify = unsignedRBO.generateHashFromBinaryObject();

		ECDSASigner signer = new ECDSASigner();
		ECDSASignature signature = new ECDSASignature(signatureBytes, signingPubKeyBytes);
		signer.init(false, new ECPublicKeyParameters(signature.publicSigningKey, StellarDeterministicKeyGenerator.SECP256K1_PARAMS));
		return signer.verifySignature(hashToVerify, signature.r, signature.s);
	} catch (IOException e) {
		throw new RuntimeException(e);
	}
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
default byte[] sign(Account account) {
	ECDSASigner signer = new ECDSASigner();
	signer.init(true, new ECPrivateKeyParameters(new BigInteger(1, account.privateKey), ECC.secp256r1));
	BigInteger[] bi = signer.generateSignature(Digest.sha256(getHashData()));// dna
	byte[] signature = new byte[64];
	System.arraycopy(BigIntegers.asUnsignedByteArray(32, bi[0]), 0, signature, 0, 32);
	System.arraycopy(BigIntegers.asUnsignedByteArray(32, bi[1]), 0, signature, 32, 32);
	return signature;
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
/**
 * UAF_ALG_SIGN_SECP256R1_ECDSA_SHA256_RAW 0x01 An ECDSA signature on the
 * NIST secp256r1 curve which MUST have raw R and S buffers, encoded in
 * big-endian order. I.e. [R (32 bytes), S (32 bytes)]
 * 
 * @param priv
 *            - Private key
 * @param input
 *            - Data to sign
 * @return BigInteger[] - [R,S]
 */
public static BigInteger[] signAndFromatToRS(PrivateKey priv, byte[] input) {
	X9ECParameters params = SECNamedCurves.getByName("secp256r1");
	ECDomainParameters ecParams = new ECDomainParameters(params.getCurve(),
			params.getG(), params.getN(), params.getH());
	if (priv == null)
		throw new IllegalStateException(
				"This ECKey does not have the private key necessary for signing.");
	ECDSASigner signer = new ECDSASigner();
	ECPrivateKeyParameters privKey = new ECPrivateKeyParameters(
			((ECPrivateKey) priv).getS(), ecParams);
	signer.init(true, privKey);
	BigInteger[] sigs = signer.generateSignature(input);
	return sigs;
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
public static boolean verify(byte[] pub, byte[] dataForSigning,
		BigInteger[] rs) throws Exception {
	ECDSASigner signer = new ECDSASigner();
	X9ECParameters params = SECNamedCurves.getByName("secp256r1");
	ECDomainParameters ecParams = new ECDomainParameters(params.getCurve(),
			params.getG(), params.getN(), params.getH());
	ECPublicKeyParameters pubKeyParams = new ECPublicKeyParameters(ecParams
			.getCurve().decodePoint(pub), ecParams);
	signer.init(false, pubKeyParams);

	return signer.verifySignature(dataForSigning, rs[0].abs(), rs[1].abs());
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
/**
 * Sign a hash with the private key of this key pair.
 * @param transactionHash   the hash to sign
 * @return  An {@link ECDSASignature} of the hash
 */
public ECDSASignature sign(byte[] transactionHash) {
    ECDSASigner signer = new ECDSASigner(new HMacDSAKCalculator(new SHA256Digest()));

    ECPrivateKeyParameters privKey = new ECPrivateKeyParameters(privateKey, Sign.CURVE);
    signer.init(true, privKey);
    BigInteger[] components = signer.generateSignature(transactionHash);

    return new ECDSASignature(components[0], components[1]).toCanonicalised();
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
/**
 * Sign a digest with this key.
 *
 * @param hash arbitrary data
 * @return signature
 */
public byte[] sign(byte[] hash) {
    ECDSASigner signer = new ECDSASigner(new HMacDSAKCalculator(new SHA256Digest()));
    signer.init(true, new ECPrivateKeyParameters(priv, domain));
    BigInteger[] signature = signer.generateSignature(hash);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    try {
        DERSequenceGenerator seq = new DERSequenceGenerator(baos);
        seq.addObject(new ASN1Integer(signature[0]));
        seq.addObject(new ASN1Integer(toCanonicalS(signature[1])));
        seq.close();
        return baos.toByteArray();
    } catch (IOException e) {
    }
    return null;
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
/**
 * Sign data using the ECDSA algorithm.
 */
public static byte[][] signTransaction(byte[] data, byte[] privateKey) {
  try {
    Security.addProvider(new BouncyCastleProvider());
    ECNamedCurveParameterSpec spec = ECNamedCurveTable.getParameterSpec(SECP256K1);

    ECDSASigner ecdsaSigner = new ECDSASigner();
    ECDomainParameters domain = new ECDomainParameters(spec.getCurve(), spec.getG(), spec.getN());
    ECPrivateKeyParameters privateKeyParms =
        new ECPrivateKeyParameters(new BigInteger(1, privateKey), domain);
    ParametersWithRandom params = new ParametersWithRandom(privateKeyParms);

    ecdsaSigner.init(true, params);

    BigInteger[] sig = ecdsaSigner.generateSignature(data);
    LinkedList<byte[]> sigData = new LinkedList<>();
    byte[] publicKey = getPublicKey(privateKey);
    byte recoveryId = getRecoveryId(sig[0].toByteArray(), sig[1].toByteArray(), data, publicKey);
    for (BigInteger sigChunk : sig) {
      sigData.add(sigChunk.toByteArray());
    }
    sigData.add(new byte[]{recoveryId});
    return sigData.toArray(new byte[][]{});

  } catch (Exception e) {
    LOGGER.error(null, e);
    return new byte[0][0];
  }
}
 

import org.bouncycastle.crypto.signers.ECDSASigner; //导入方法依赖的package包/类
public boolean verifySignature(byte[] message, BigInteger r, BigInteger s) {
    ECDomainParameters ecDomainParameters = ECAssistant.ecDomainParametersFrom(x9ECParameters);
    ECPublicKeyParameters ecPublicKeyParameters = new ECPublicKeyParameters(Q, ecDomainParameters);

    ECDSASigner signer = new ECDSASigner();
    signer.init(false, ecPublicKeyParameters);

    return signer.verifySignature(message, r, s);
}