org.bitcoin.Secp256k1Context Java Examples

The following examples show how to use org.bitcoin.Secp256k1Context. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: ECKey.java    From bcm-android with GNU General Public License v3.0 6 votes vote down vote up 
protected ECDSASignature doSign(Sha256Hash input, BigInteger privateKeyForSigning) {
    if (Secp256k1Context.isEnabled()) {
        try {
            byte[] signature = NativeSecp256k1.sign(
                    input.getBytes(),
                    Utils.bigIntegerToBytes(privateKeyForSigning, 32)
            );
            return ECDSASignature.decodeFromDER(signature);
        } catch (NativeSecp256k1Util.AssertFailException e) {
            log.error("Caught AssertFailException inside secp256k1", e);
            throw new RuntimeException(e);
        }
    }
    if (FAKE_SIGNATURES)
        return TransactionSignature.dummy();
    checkNotNull(privateKeyForSigning);
    ECDSASigner signer = new ECDSASigner(new HMacDSAKCalculator(new SHA256Digest()));
    ECPrivateKeyParameters privKey = new ECPrivateKeyParameters(privateKeyForSigning, CURVE);
    signer.init(true, privKey);
    BigInteger[] components = signer.generateSignature(input.getBytes());
    return new ECDSASignature(components[0], components[1]).toCanonicalised();
}
Example #2
Source File: ECKey.java    From green_android with GNU General Public License v3.0 6 votes vote down vote up 
protected ECDSASignature doSign(Sha256Hash input, BigInteger privateKeyForSigning) {
    if (Secp256k1Context.isEnabled()) {
        try {
            byte[] signature = NativeSecp256k1.sign(
                    input.getBytes(),
                    Utils.bigIntegerToBytes(privateKeyForSigning, 32)
            );
            return ECDSASignature.decodeFromDER(signature);
        } catch (NativeSecp256k1Util.AssertFailException e) {
            log.error("Caught AssertFailException inside secp256k1", e);
            throw new RuntimeException(e);
        }
    }
    if (FAKE_SIGNATURES)
        return TransactionSignature.dummy();
    checkNotNull(privateKeyForSigning);
    ECDSASigner signer = new ECDSASigner(new HMacDSAKCalculator(new SHA256Digest()));
    ECPrivateKeyParameters privKey = new ECPrivateKeyParameters(privateKeyForSigning, CURVE);
    signer.init(true, privKey);
    BigInteger[] components = signer.generateSignature(input.getBytes());
    return new ECDSASignature(components[0], components[1]).toCanonicalised();
}
Example #3
Source File: ECKey.java    From GreenBits with GNU General Public License v3.0 6 votes vote down vote up 
protected ECDSASignature doSign(Sha256Hash input, BigInteger privateKeyForSigning) {
    if (Secp256k1Context.isEnabled()) {
        try {
            byte[] signature = NativeSecp256k1.sign(
                    input.getBytes(),
                    Utils.bigIntegerToBytes(privateKeyForSigning, 32)
            );
            return ECDSASignature.decodeFromDER(signature);
        } catch (NativeSecp256k1Util.AssertFailException e) {
            log.error("Caught AssertFailException inside secp256k1", e);
            throw new RuntimeException(e);
        }
    }
    if (FAKE_SIGNATURES)
        return TransactionSignature.dummy();
    checkNotNull(privateKeyForSigning);
    ECDSASigner signer = new ECDSASigner(new HMacDSAKCalculator(new SHA256Digest()));
    ECPrivateKeyParameters privKey = new ECPrivateKeyParameters(privateKeyForSigning, CURVE);
    signer.init(true, privKey);
    BigInteger[] components = signer.generateSignature(input.getBytes());
    return new ECDSASignature(components[0], components[1]).toCanonicalised();
}
Example #4
Source File: ECKey.java    From bcm-android with GNU General Public License v3.0 5 votes vote down vote up 
/**
 * Verifies the given ASN.1 encoded ECDSA signature against a hash using the public key.
 *
 * @param data      Hash of the data to verify.
 * @param signature ASN.1 encoded signature.
 * @param pub       The public key bytes to use.
 */
public static boolean verify(byte[] data, byte[] signature, byte[] pub) {
    if (Secp256k1Context.isEnabled()) {
        try {
            return NativeSecp256k1.verify(data, signature, pub);
        } catch (NativeSecp256k1Util.AssertFailException e) {
            log.error("Caught AssertFailException inside secp256k1", e);
            return false;
        }
    }
    return verify(data, ECDSASignature.decodeFromDER(signature), pub);
}
Example #5
Source File: ECKey.java    From green_android with GNU General Public License v3.0 5 votes vote down vote up 
/**
 * Verifies the given ASN.1 encoded ECDSA signature against a hash using the public key.
 *
 * @param data      Hash of the data to verify.
 * @param signature ASN.1 encoded signature.
 * @param pub       The public key bytes to use.
 */
public static boolean verify(byte[] data, byte[] signature, byte[] pub) {
    if (Secp256k1Context.isEnabled()) {
        try {
            return NativeSecp256k1.verify(data, signature, pub);
        } catch (NativeSecp256k1Util.AssertFailException e) {
            log.error("Caught AssertFailException inside secp256k1", e);
            return false;
        }
    }
    return verify(data, ECDSASignature.decodeFromDER(signature), pub);
}
Example #6
Source File: ECKey.java    From GreenBits with GNU General Public License v3.0 5 votes vote down vote up 
/**
 * Verifies the given ASN.1 encoded ECDSA signature against a hash using the public key.
 *
 * @param data      Hash of the data to verify.
 * @param signature ASN.1 encoded signature.
 * @param pub       The public key bytes to use.
 */
public static boolean verify(byte[] data, byte[] signature, byte[] pub) {
    if (Secp256k1Context.isEnabled()) {
        try {
            return NativeSecp256k1.verify(data, signature, pub);
        } catch (NativeSecp256k1Util.AssertFailException e) {
            log.error("Caught AssertFailException inside secp256k1", e);
            return false;
        }
    }
    return verify(data, ECDSASignature.decodeFromDER(signature), pub);
}