Examples with ECPrivateKeyParameters org.bouncycastle.crypto.params.ECPrivateKeyParameters used on opensource projects

Example 26 with ECPrivateKeyParameters

use of org.bouncycastle.crypto.params.ECPrivateKeyParameters in project web3sdk by FISCO-BCOS.

the class SM2Sign method sign2.

/**
 * The new sm2 signature algorithm with better performance
 *
 * @param message
 * @param ecKeyPair
 * @return
 */
public static Sign.SignatureData sign2(byte[] message, ECKeyPair ecKeyPair) {
    SM2Signer sm2Signer = new SM2Signer();
    ECPrivateKeyParameters eCPrivateKeyParameters = new ECPrivateKeyParameters(ecKeyPair.getPrivateKey(), eCDomainParameters);
    sm2Signer.initWithCache(true, new ParametersWithID(new ParametersWithRandom(eCPrivateKeyParameters), identValue));
    org.bouncycastle.crypto.digests.SM3Digest sm3Digest = new org.bouncycastle.crypto.digests.SM3Digest();
    byte[] md = new byte[sm3Digest.getDigestSize()];
    sm3Digest.update(message, 0, message.length);
    sm3Digest.doFinal(md, 0);
    sm2Signer.update(md, 0, md.length);
    byte[] r = null;
    byte[] s = null;
    byte[] pub = null;
    try {
        BigInteger[] bigIntegers = sm2Signer.generateSignature2();
        pub = Numeric.toBytesPadded(ecKeyPair.getPublicKey(), 64);
        r = SM2Algorithm.getEncoded(bigIntegers[0]);
        s = SM2Algorithm.getEncoded(bigIntegers[1]);
    } catch (CryptoException e) {
        throw new RuntimeException(e);
    }
    return new Sign.SignatureData((byte) 0, r, s, pub);
}