Class SM3

security/src/main/java/pro/tools/security/sm/SM3.java:13–207

SM3杂凑算法实现 @author SeanDragon

 * @author SeanDragon
 */
public class SM3 {

    private static final String ivHexStr = "7380166f 4914b2b9 172442d7 da8a0600 a96f30bc 163138aa e38dee4d b0fb0e4e";
    private static final BigInteger IV = new BigInteger(ivHexStr.replaceAll(" ",
            ""), 16);
    private static final Integer Tj15 = Integer.valueOf("79cc4519", 16);
    private static final Integer Tj63 = Integer.valueOf("7a879d8a", 16);
    private static final byte[] FirstPadding = {(byte) 0x80};
    private static final byte[] ZeroPadding = {(byte) 0x00};
    private static char[] hexDigits = {'0', '1', '2', '3', '4', '5', '6', '7', '8',
            '9', 'A', 'B', 'C', 'D', 'E', 'F'};

    private static int T(int j) {
        if (j >= 0 && j <= 15) {
            return Tj15;
        } else if (j >= 16 && j <= 63) {
            return Tj63;
        } else {
            throw new RuntimeException("data invalid");
        }
    }

    private static Integer FF(Integer x, Integer y, Integer z, int j) {
        if (j >= 0 && j <= 15) {
            return x ^ y ^ z;
        } else if (j >= 16 && j <= 63) {
            return (x & y)
                    | (x & z)
                    | (y & z);
        } else {
            throw new RuntimeException("data invalid");
        }
    }

    private static Integer GG(Integer x, Integer y, Integer z, int j) {
        if (j >= 0 && j <= 15) {
            return x ^ y ^ z;
        } else if (j >= 16 && j <= 63) {
            return (x & y) | (~x & z);
        } else {
            throw new RuntimeException("data invalid");
        }
    }

    private static Integer P0(Integer x) {
        return x
                ^ Integer.rotateLeft(x, 9)
                ^ Integer.rotateLeft(x, 17);
    }

    private static Integer P1(Integer x) {
        return x
                ^ Integer.rotateLeft(x, 15)
                ^ Integer.rotateLeft(x, 23);
    }

    private static byte[] padding(byte[] source) throws IOException {
        long l = source.length * 8;