Examples with SM3Digest org.fisco.bcos.web3j.crypto.gm.sm2.crypto.digests.SM3Digest used on opensource projects

Example 6 with SM3Digest

use of org.fisco.bcos.web3j.crypto.gm.sm2.crypto.digests.SM3Digest in project web3sdk by FISCO-BCOS.

the class SM2Algorithm method calculateC3.

/*
     * 第7步:计算 C3 = Hash(X2 || M || Y2)
     */
private static byte[] calculateC3(BigInteger x2, byte[] m, BigInteger y2) {
    SM3Digest sm3 = new SM3Digest();
    byte[] c3 = new byte[32];
    byte[] x2Buf = padding(x2.toByteArray());
    byte[] y2Buf = padding(y2.toByteArray());
    sm3.update(x2Buf, 0, x2Buf.length);
    sm3.update(m, 0, m.length);
    sm3.update(y2Buf, 0, y2Buf.length);
    sm3.doFinal(c3, 0);
    return c3;
}

Example 7 with SM3Digest

use of org.fisco.bcos.web3j.crypto.gm.sm2.crypto.digests.SM3Digest in project web3sdk by FISCO-BCOS.

the class SM2Algorithm method sm2GetZ.

/**
 * 计算Za
 *
 * @param userId
 * @param publicKey
 * @return
 * @date 2015年12月4日
 * @author fisco-bcos
 */
private static byte[] sm2GetZ(byte[] userId, ECPoint publicKey) {
    SM3Digest sm3 = new SM3Digest();
    int BitsLength = userId.length << 3;
    sm3.update((byte) (BitsLength >> 8 & 0xFF));
    sm3.update((byte) (BitsLength & 0xFF));
    sm3BlockUpdate(sm3, userId);
    sm3BlockUpdate(sm3, getEncoded(a));
    sm3BlockUpdate(sm3, getEncoded(b));
    sm3BlockUpdate(sm3, getEncoded(gx));
    sm3BlockUpdate(sm3, getEncoded(gy));
    ECPoint ecPoint = publicKey.normalize();
    sm3BlockUpdate(sm3, getEncoded(ecPoint.getAffineXCoord().toBigInteger()));
    sm3BlockUpdate(sm3, getEncoded(ecPoint.getAffineYCoord().toBigInteger()));
    byte[] md = new byte[sm3.getDigestSize()];
    sm3.doFinal(md, 0);
    return md;
}