生成16位、8位的pinblock（JAVA實現）

生成16位、8位的pinblock

 

引言

最近在對接某金融行業的改造需要生成國密的pinblock，網上找不到生成16位的pinblock的實現。只有pinblock8位的生成， 基於此，稍作修改，並增加了pinblock16位生成。分別可以生成8位的pinblock和16位的pinblock，此代碼的實現使用java語言實現。

廢話不多上直接上代碼

代碼

import java.util.Arrays;

/**
 *
 * @Package: PACKAGE_NAME
 * @Description: for pinblock
 * @Author: syouya.shiraki
 * @CreateDate: 2020/5/21 0021 16:23
 * @UpdateDate: 2020/5/21 0021 16:23
 * @UpdateRemark: The modified content
 * @Version: 1.0
 **/

public class PIN {
    public static void printHexString(String hint, byte[] b) {
        System.out.print(hint);
        for (int i = 0; i < b.length; i++) {
            String hex = Integer.toHexString(b[i] & 0xFF);
            if (hex.length() == 1) {
                hex = '0' + hex;
            }
            System.out.print(hex.toUpperCase() + " ");
        }
        System.out.println("");
    }

    /**
     * transfer byte to hex string
     * @param b
     * @return
     */
    public static String Bytes2HexString(byte[] b) {
        String ret = "";
        for (int i = 0; i < b.length; i++) {
            String hex = Integer.toHexString(b[i] & 0xFF);
            if (hex.length() == 1) {
                hex = '0' + hex;
            }
            ret += hex.toUpperCase();
        }
        return ret;
    }


    /**
     *
     * @param src0
     * @param src1
     * @return
     */
    public static byte uniteBytes(byte src0, byte src1) {
        byte _b0 = Byte.decode("0x" + new String(new byte[] { src0 }))
                .byteValue();
        _b0 = (byte) (_b0 << 4);
        byte _b1 = Byte.decode("0x" + new String(new byte[] { src1 }))
                .byteValue();
        byte ret = (byte) (_b0 ^ _b1);
        return ret;
    }


    /**
     * transfer hex string to byte[]
     * @param src
     * @return
     */
    public static byte[] HexString2Bytes(String src) {
        byte[] ret = new byte[8];
        byte[] tmp = src.getBytes();
        for (int i = 0; i < 8; i++) {
            ret[i] = uniteBytes(tmp[i * 2], tmp[i * 2 + 1]);
        }
        return ret;
    }

    /**
     * get pinblock8 for gj
     * @param pin
     * @param accno
     * @return
     */
    public static byte[] GenPinBlock8(String pin, String accno) {
        byte arrAccno[] = getHAccno(accno);
        byte arrPin[] = getHPin(pin);
        byte arrRet[] = new byte[8];

        for (int i = 0; i < 8; i++) {
            arrRet[i] = (byte) (arrPin[i] ^ arrAccno[i]);
        }
        printHexString("PinBlock：", arrRet);
        return arrRet;
    }

    /**
     * get pinblock16 for gm
     * @param pin
     * @param accno
     * @return
     */
    public static byte[] GenPinBlock16(String pin, String accno) {
        byte arrAccno[] = getHAccno16(accno);
        byte arrPin[] = getHPin16(pin);
        byte arrRet[] = new byte[16];
        for (int i = 0; i < 16; i++) {
            arrRet[i] = (byte) (arrPin[i] ^ arrAccno[i]);
        }

        printHexString("PinBlock16：", arrRet);
        return arrRet;
    }

    /**
     * get pin8 for gj
     * @param pin
     * @return
     */
    public static byte[] getHPin(String pin) {
        byte arrPin[] = pin.getBytes();
        byte encode[] = new byte[8];
        encode[0] = (byte) 0x06;
        encode[1] = (byte) uniteBytes(arrPin[0], arrPin[1]);
        encode[2] = (byte) uniteBytes(arrPin[2], arrPin[3]);
        encode[3] = (byte) uniteBytes(arrPin[4], arrPin[5]);
        encode[4] = (byte) 0xFF;
        encode[5] = (byte) 0xFF;
        encode[6] = (byte) 0xFF;
        encode[7] = (byte) 0xFF;
        printHexString("encoded pin：", encode);
        return encode;
    }

    /**
     * get pin8 for gm
     * @param pin
     * @return
     */
    public static byte[] getHPin16(String pin) {
        byte pin8[] = getHPin(pin);
        byte pin16[] = new byte[16];
        Arrays.fill(pin16, (byte) 0xFF);
        System.arraycopy(pin8, 0, pin16, 0, 8);
        printHexString("encoded pin16：", pin16);
        return pin16;
    }

    /**
     * get acctno for gj
     * @param accno
     * @return
     */
    public static byte[] getHAccno(String accno) {
        int len = accno.length();
        byte arrTemp[] = accno.substring(len < 13 ? 0 : len - 13, len - 1).getBytes();
        byte arrAccno[] = new byte[12];
        for (int i = 0; i < 12; i++) {
            arrAccno[i] = (i <= arrTemp.length ? arrTemp[i] : (byte) 0x00);
        }
        byte encode[] = new byte[8];
        encode[0] = (byte) 0x00;
        encode[1] = (byte) 0x00;
        encode[2] = (byte) uniteBytes(arrAccno[0], arrAccno[1]);
        encode[3] = (byte) uniteBytes(arrAccno[2], arrAccno[3]);
        encode[4] = (byte) uniteBytes(arrAccno[4], arrAccno[5]);
        encode[5] = (byte) uniteBytes(arrAccno[6], arrAccno[7]);
        encode[6] = (byte) uniteBytes(arrAccno[8], arrAccno[9]);
        encode[7] = (byte) uniteBytes(arrAccno[10], arrAccno[11]);
        printHexString("encoded accno：", encode);
        return encode;
    }

    /**
     * get accno for gm
     * @param accno
     * @return
     */
    public static byte[] getHAccno16(String accno) {
        byte[] accno8 = getHAccno(accno);
        byte[] accno16 = new byte[16];
        System.arraycopy(accno8, 0, accno16, 8, 8);
        return accno16;
    }

    /**
     * test for get pinblock8 pinblock16
     * @param args
     */
    public static void main(String[] args) {
        String pin = "123123";
        String accno = "6219770102889856";
        System.out.println("encoded pin："+pin);
        System.out.println("encoded accno："+accno);
        System.out.println("GJ=======================================");
        GenPinBlock8(pin, accno);
        System.out.println("GM=======================================");
        GenPinBlock16(pin, accno);
    }
}
/**
 * output:
 * encoded pin：123123
 * encoded accno：6219770102889856
 * GJ=======================================
 * encoded accno：00 00 97 70 10 28 89 85 
 * encoded pin：06 12 31 23 FF FF FF FF 
 * PinBlock：06 12 A6 53 EF D7 76 7A 
 * GM=======================================
 * encoded accno：00 00 97 70 10 28 89 85 
 * encoded pin：06 12 31 23 FF FF FF FF 
 * encoded pin16：06 12 31 23 FF FF FF FF FF FF FF FF FF FF FF FF 
 * PinBlock16：06 12 31 23 FF FF FF FF FF FF 68 8F EF D7 76 7A 
 */