生成16位、8位的pinblock

引言

最近在对接某金融行业的改造需要生成国密的pinblock，网上找不到生成16位的pinblock的实现。只有pinblock8位的生成， 基于此，稍作修改，并增加了pinblock16位生成。分别可以生成8位的pinblock和16位的pinblock，此代码的实现使用java语言实现。

废话不多上直接上代码

代码

 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   */