org.spongycastle.asn1.DERSequenceGenerator Java Examples

The following examples show how to use org.spongycastle.asn1.DERSequenceGenerator. 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 bitherj with Apache License 2.0 6 votes vote down vote up 
/**
 * Output this ECKey as an ASN.1 encoded private key, as understood by OpenSSL or used by the BitCoin reference
 * implementation in its wallet storage format.
 */
public byte[] toASN1() {
    try {
        ByteArrayOutputStream baos = new ByteArrayOutputStream(400);

        // ASN1_SEQUENCE(EC_PRIVATEKEY) = {
        //   ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG),
        //   ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
        //   ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
        //   ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
        // } ASN1_SEQUENCE_END(EC_PRIVATEKEY)
        DERSequenceGenerator seq = new DERSequenceGenerator(baos);
        seq.addObject(new ASN1Integer(1)); // version
        seq.addObject(new DEROctetString(priv.toByteArray()));
        seq.addObject(new DERTaggedObject(0, SECNamedCurves.getByName("secp256k1").toASN1Primitive()));
        seq.addObject(new DERTaggedObject(1, new DERBitString(getPubKey())));
        seq.close();
        return baos.toByteArray();
    } catch (IOException e) {
        throw new RuntimeException(e);  // Cannot happen, writing to memory stream.
    }
}
Example #2
Source File: SM2Util.java    From chain33-sdk-java with BSD 2-Clause "Simplified" License 5 votes vote down vote up 
private static ByteArrayOutputStream derByteStream(BigInteger r,BigInteger s) throws IOException {
    // Usually 70-72 bytes.
    ByteArrayOutputStream bos = new ByteArrayOutputStream(72);
    DERSequenceGenerator seq = new DERSequenceGenerator(bos);
    seq.addObject(new ASN1Integer(r));
    seq.addObject(new ASN1Integer(s));
    seq.close();
    return bos;
}
Example #3
Source File: ZCashTransaction_taddr.java    From guarda-android-wallets with GNU General Public License v3.0 5 votes vote down vote up 
private byte[] getInputSignature(Tx_in input) throws ZCashException {
  byte[] personalization = Bytes.concat(ZCASH_SIGNATURE_HASH_PERSONALIZATION, Utils.int32BytesLE(consensusBranchId));
  Blake2bDigest tx_digest = new Blake2bDigest(null, 32, null, personalization);
  byte[] preimage = Bytes.concat(
    tx_sig_bytes,
    input.txid,
    Utils.int32BytesLE(input.index),
    Utils.compactSizeIntLE(input.script.length),
    input.script,
    Utils.int64BytesLE(input.value),
    Utils.int32BytesLE(input.sequence)
  );

  byte[] hash = new byte[32];
  tx_digest.update(preimage, 0, preimage.length);
  tx_digest.doFinal(hash, 0);
  Sha256Hash sha256Hash = new Sha256Hash(hash);
  ECKey.ECDSASignature sig = privKey.sign(sha256Hash);
  sig = sig.toCanonicalised();
  ByteArrayOutputStream bos = new ByteArrayOutputStream(72);
  try {
    DERSequenceGenerator seq = new DERSequenceGenerator(bos);
    seq.addObject(new ASN1Integer(sig.r));
    seq.addObject(new ASN1Integer(sig.s));
    seq.close();
  } catch (IOException e) {
    throw new ZCashException("Cannot encode signature into transaction in ZCashTransaction_taddr.getInputSignature", e);
  }

  return bos.toByteArray();
}
Example #4
Source File: ZCashTransaction_taddr.java    From guarda-android-wallets with GNU General Public License v3.0 5 votes vote down vote up 
private byte[] getInputSignature(Tx_in input) throws ZCashException {
  byte[] personalization = Bytes.concat(ZCASH_SIGNATURE_HASH_PERSONALIZATION, Utils.int32BytesLE(consensusBranchId));
  Blake2bDigest tx_digest = new Blake2bDigest(null, 32, null, personalization);
  byte[] preimage = Bytes.concat(
    tx_sig_bytes,
    input.txid,
    Utils.int32BytesLE(input.index),
    Utils.compactSizeIntLE(input.script.length),
    input.script,
    Utils.int64BytesLE(input.value),
    Utils.int32BytesLE(input.sequence)
  );

  byte[] hash = new byte[32];
  tx_digest.update(preimage, 0, preimage.length);
  tx_digest.doFinal(hash, 0);
  Sha256Hash sha256Hash = new Sha256Hash(hash);
  ECKey.ECDSASignature sig = privKey.sign(sha256Hash);
  sig = sig.toCanonicalised();
  ByteArrayOutputStream bos = new ByteArrayOutputStream(72);
  try {
    DERSequenceGenerator seq = new DERSequenceGenerator(bos);
    seq.addObject(new ASN1Integer(sig.r));
    seq.addObject(new ASN1Integer(sig.s));
    seq.close();
  } catch (IOException e) {
    throw new ZCashException("Cannot encode signature into transaction in ZCashTransaction_taddr.getInputSignature", e);
  }

  return bos.toByteArray();
}
Example #5
Source File: ECDSAAlgorithm.java    From md_blockchain with Apache License 2.0 5 votes vote down vote up 
protected ByteArrayOutputStream derByteStream() throws IOException {
    // Usually 70-72 bytes.
    ByteArrayOutputStream bos = new ByteArrayOutputStream(72);
    DERSequenceGenerator seq = new DERSequenceGenerator(bos);
    seq.addObject(new ASN1Integer(r));
    seq.addObject(new ASN1Integer(s));
    seq.close();
    return bos;
}
Example #6
Source File: BitCoinECKeyPair.java    From BlockchainWallet-Crypto with GNU General Public License v3.0 5 votes vote down vote up 
public byte[] signBTC(byte[] hash) {
    ECDSASigner signer = new ECDSASigner();
    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 DERInteger(signature[0]));
        seq.addObject(new DERInteger(signature[1]));
        seq.close();
        return s.toByteArray();
    } catch (IOException e) {
    }
    return null;
}
Example #7
Source File: ECKey.java    From nuls with MIT License 5 votes vote down vote up 
protected ByteArrayOutputStream derByteStream() throws IOException {
    // Usually 70-72 bytes.
    ByteArrayOutputStream bos = new ByteArrayOutputStream(72);
    DERSequenceGenerator seq = new DERSequenceGenerator(bos);
    seq.addObject(new ASN1Integer(r));
    seq.addObject(new ASN1Integer(s));
    seq.close();
    return bos;
}
Example #8
Source File: Asn1.java    From UAF with Apache License 2.0 5 votes vote down vote up 
/**
 	 * DER - From Big Integer rs to byte[]
 	 * UAF_ALG_SIGN_SECP256K1_ECDSA_SHA256_DER 0x06
 	 * DER [ITU-X690-2008] encoded ECDSA signature [RFC5480] on the secp256k1 curve.
 	 * I.e. a DER encoded SEQUENCE { r INTEGER, s INTEGER }
 	 * @param signature
 	 * @return
 	 * @throws IOException
 	 */
 	public static byte[] getEncoded(BigInteger[] sigs)
		throws IOException {
	ByteArrayOutputStream bos = new ByteArrayOutputStream(72);
	DERSequenceGenerator seq = new DERSequenceGenerator(bos);
	seq.addObject(new ASN1Integer(sigs[0]));
	seq.addObject(new ASN1Integer(sigs[1]));
	seq.close();
	return bos.toByteArray();
}
Example #9
Source File: ECKey.java    From bitherj with Apache License 2.0 5 votes vote down vote up 
protected ByteArrayOutputStream derByteStream() throws IOException {
    // Usually 70-72 bytes.
    ByteArrayOutputStream bos = new ByteArrayOutputStream(72);
    DERSequenceGenerator seq = new DERSequenceGenerator(bos);
    seq.addObject(new ASN1Integer(r));
    seq.addObject(new ASN1Integer(s));
    seq.close();
    return bos;
}