国密sm4加密、解密Java和js

目录

一、前端

sm4.js

二、Java后端

SM4.java

SM4_Context.java

Util.java

SM4Utils.java

 三、测试


一、前端

sm4.js

/**
 * base64js
 * base64js.toByteArray(d.input)
 * base64js.fromByteArray(c);
 * 国密SM4加密算法
 */
(function(r){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=r()}else{if(typeof define===
    "function"&&define.amd){define([],r)}else{var e;if(typeof window!=="undefined"){e=window}else{if(typeof global
    !=="undefined"){e=global}else{if(typeof self!=="undefined"){e=self}else{e=this}}}e.base64js=r()}}})(function(){
    var r,e,t;return function r(e,t,n){function o(i,a){if(!t[i]){if(!e[i]){var u=typeof require=="function"&&require;if(!a&&u){
        return u(i,!0)}if(f){return f(i,!0)}var d=new Error("Cannot find module '"+i+"'");throw d.code="MODULE_NOT_FOUND",d}
        var c=t[i]={exports:{}};e[i][0].call(c.exports,function(r){var t=e[i][1][r];return o(t?t:r)},c,c.exports,r,e,t,n)}return t[i].exports}
        var f=typeof require=="function"&&require;for(var i=0;i0){
                throw new Error("Invalid string. Length must be a multiple of 4")}return r[e-2]==="="?2:r[e-1]==="="?1:0}
            function c(r){return r.length*3/4-d(r)}function v(r){var e,t,n,i,a;var u=r.length;i=d(r);a=new f(u*3/4-i);t=i>0?u-4:u;
                var c=0;for(e=0;e>16&255;a[c++]=n>>8&255;a[c++]=n&255}if(i===2){n=o[r.charCodeAt(e)]<<2|o[r.charCodeAt(e+1)]>>4;a[c++]=n&255}
                else{if(i===1){n=o[r.charCodeAt(e)]<<10|o[r.charCodeAt(e+1)]<<4|o[r.charCodeAt(e+2)]>>2;a[c++]=n>>8&255;a[c++]=n&255}}return a}
            function l(r){return n[r>>18&63]+n[r>>12&63]+n[r>>6&63]+n[r&63]}function h(r,e,t){var n;var o=[];for(var f=e;fd?d:u+a))}if(o===1){e=r[t-1];f+=n[e>>2];f+=n[e<<4&63];f+="=="}else{if(o===2){
                    e=(r[t-2]<<8)+r[t-1];f+=n[e>>10];f+=n[e>>4&63];f+=n[e<<2&63];f+="="}}i.push(f);return i.join("")}},{}]},{},[])("/")});
 
 
/**
 * 国密SM4加密算法
 * @author wzk
 * @email [email protected]
 * @company 中科软
 */
function SM4_Context() {
    this.mode=1;
    this.isPadding = true;
    this.sk = new Array(32);
}
 
function SM4() {
    this.SM4_ENCRYPT=1;
    this.SM4_DECRYPT = 0;
 
    var SboxTable = [0xd6,0x90,0xe9,0xfe,0xcc,0xe1,0x3d,0xb7,0x16,0xb6,0x14,0xc2,0x28,0xfb,0x2c,0x05,
        0x2b,0x67,0x9a,0x76,0x2a,0xbe,0x04,0xc3,0xaa,0x44,0x13,0x26,0x49,0x86,0x06,0x99,
        0x9c,0x42,0x50,0xf4,0x91,0xef,0x98,0x7a,0x33,0x54,0x0b,0x43,0xed,0xcf,0xac,0x62,
        0xe4,0xb3,0x1c,0xa9,0xc9,0x08,0xe8,0x95,0x80,0xdf,0x94,0xfa,0x75,0x8f,0x3f,0xa6,
        0x47,0x07,0xa7,0xfc,0xf3,0x73,0x17,0xba,0x83,0x59,0x3c,0x19,0xe6,0x85,0x4f,0xa8,
        0x68,0x6b,0x81,0xb2,0x71,0x64,0xda,0x8b,0xf8,0xeb,0x0f,0x4b,0x70,0x56,0x9d,0x35,
        0x1e,0x24,0x0e,0x5e,0x63,0x58,0xd1,0xa2,0x25,0x22,0x7c,0x3b,0x01,0x21,0x78,0x87,
        0xd4,0x00,0x46,0x57,0x9f,0xd3,0x27,0x52,0x4c,0x36,0x02,0xe7,0xa0,0xc4,0xc8,0x9e,
        0xea,0xbf,0x8a,0xd2,0x40,0xc7,0x38,0xb5,0xa3,0xf7,0xf2,0xce,0xf9,0x61,0x15,0xa1,
        0xe0,0xae,0x5d,0xa4,0x9b,0x34,0x1a,0x55,0xad,0x93,0x32,0x30,0xf5,0x8c,0xb1,0xe3,
        0x1d,0xf6,0xe2,0x2e,0x82,0x66,0xca,0x60,0xc0,0x29,0x23,0xab,0x0d,0x53,0x4e,0x6f,
        0xd5,0xdb,0x37,0x45,0xde,0xfd,0x8e,0x2f,0x03,0xff,0x6a,0x72,0x6d,0x6c,0x5b,0x51,
        0x8d,0x1b,0xaf,0x92,0xbb,0xdd,0xbc,0x7f,0x11,0xd9,0x5c,0x41,0x1f,0x10,0x5a,0xd8,
        0x0a,0xc1,0x31,0x88,0xa5,0xcd,0x7b,0xbd,0x2d,0x74,0xd0,0x12,0xb8,0xe5,0xb4,0xb0,
        0x89,0x69,0x97,0x4a,0x0c,0x96,0x77,0x7e,0x65,0xb9,0xf1,0x09,0xc5,0x6e,0xc6,0x84,
        0x18,0xf0,0x7d,0xec,0x3a,0xdc,0x4d,0x20,0x79,0xee,0x5f,0x3e,0xd7,0xcb,0x39,0x48];
 
    var FK = [ 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc ];
 
    var CK = [ 0x00070e15,0x1c232a31,0x383f464d,0x545b6269,
        0x70777e85,0x8c939aa1,0xa8afb6bd,0xc4cbd2d9,
        0xe0e7eef5,0xfc030a11,0x181f262d,0x343b4249,
        0x50575e65,0x6c737a81,0x888f969d,0xa4abb2b9,
        0xc0c7ced5,0xdce3eaf1,0xf8ff060d,0x141b2229,
        0x30373e45,0x4c535a61,0x686f767d,0x848b9299,
        0xa0a7aeb5,0xbcc3cad1,0xd8dfe6ed,0xf4fb0209,
        0x10171e25,0x2c333a41,0x484f565d,0x646b7279 ];
 
    this.GET_ULONG_BE=function(b,i) {
        return (b[i] & 0xff) << 24 | ((b[i + 1] & 0xff) << 16) | ((b[i + 2] & 0xff) << 8) | (b[i + 3] & 0xff) & 0xffffffff;
    }
 
    this.PUT_ULONG_BE=function( n, b, i){
        var t1=(0xFF & (n >> 24));
        var t2=(0xFF & (n >> 16));
        var t3=(0xFF & (n >> 8));
        var t4=(0xFF & (n));
        b[i] = t1>128?t1-256:t1;
        b[i + 1] = t2>128?t2-256:t2;
        b[i + 2] = t3>128?t3-256:t3;
        b[i + 3] = t4>128?t4-256:t4;
    }
 
    this.SHL=function(x,n){
        return (x & 0xFFFFFFFF) << n;
    }
 
    this.ROTL=function( x,  n){
        var s =this.SHL(x, n);
        var ss= x >> (32 - n);
        return this.SHL(x, n) | x >> (32 - n);
    }
 
 
    this.sm4Lt=function(ka){
        var bb = 0;
        var c = 0;
        var a = new Array(4);
        var b = new Array(4);
        this.PUT_ULONG_BE(ka, a, 0);
        b[0] = this.sm4Sbox(a[0]);
        b[1] = this.sm4Sbox(a[1]);
        b[2] = this.sm4Sbox(a[2]);
        b[3] = this.sm4Sbox(a[3]);
        bb = this.GET_ULONG_BE(b, 0);
        c = bb ^ this.ROTL(bb, 2) ^ this.ROTL(bb, 10) ^ this.ROTL(bb, 18) ^ this.ROTL(bb, 24);
        return c;
    }
 
    this.sm4F=function( x0,  x1,  x2,  x3,  rk){
        return x0 ^ this.sm4Lt(x1 ^ x2 ^ x3 ^ rk);
    }
 
    this.sm4CalciRK=function(ka){
        var bb = 0;
        var rk = 0;
        var a = new Array(4);
        var b = new Array(4);
        this.PUT_ULONG_BE(ka, a, 0);
        b[0] = this.sm4Sbox(a[0]);
        b[1] = this.sm4Sbox(a[1]);
        b[2] = this.sm4Sbox(a[2]);
        b[3] = this.sm4Sbox(a[3]);
        bb = this.GET_ULONG_BE(b, 0);
        rk = bb ^ this.ROTL(bb, 13) ^ this.ROTL(bb, 23);
        return rk;
    }
 
 
 
    this.sm4Sbox=function(inch){
        var i = inch & 0xFF;
        var retVal = SboxTable[i];
        return  retVal>128?retVal-256:retVal;
    }
 
    this.sm4_setkey_enc = function(ctx, key){
        if (ctx == null) {
            alert("ctx is null!");
            return false;
        }
        if (key == null || key.length != 16){
            alert("key error!");
            return false;
        }
        ctx.mode = this.SM4_ENCRYPT;
        this.sm4_setkey(ctx.sk, key);
 
    };
 
    this.sm4_setkey = function(SK, key){
        var MK = new Array(4);
        var k =  new Array(36);
        var i = 0;
        MK[0] = this.GET_ULONG_BE(key, 0);
        MK[1] = this.GET_ULONG_BE(key, 4);
        MK[2] = this.GET_ULONG_BE(key, 8);
        MK[3] = this.GET_ULONG_BE(key, 12);
        k[0] = MK[0] ^  FK[0];
        k[1] = MK[1] ^  FK[1];
        k[2] = MK[2] ^  FK[2];
        k[3] = MK[3] ^  FK[3];
        for (var i=0; i < 32; i++){
            k[(i + 4)] = (k[i] ^ this.sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ CK[i]));
            SK[i] = k[(i + 4)];
        }
 
    }
    this.padding=function(input,mode){
        if (input == null){
            return null;
        }
        var ret =  null;
        if (mode == this.SM4_ENCRYPT){
            var p = parseInt(16 - input.length % 16);
            ret = input.slice(0);
            for (var i = 0; i < p; i++){
                ret[input.length + i] = p;
            }
        }else{
            var p = input[input.length - 1];
            ret=input.slice(0,input.length - p);
        }
        return ret;
    }
    this.sm4_one_round=function(sk, input, output){
        var  i = 0;
        var ulbuf = new Array(36);
        ulbuf[0] = this.GET_ULONG_BE(input, 0);
        ulbuf[1] = this.GET_ULONG_BE(input, 4);
        ulbuf[2] = this.GET_ULONG_BE(input, 8);
        ulbuf[3] = this.GET_ULONG_BE(input, 12);
        while (i < 32){
            ulbuf[(i + 4)] = this.sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);
            i++;
        }
        this.PUT_ULONG_BE(ulbuf[35], output, 0);
        this.PUT_ULONG_BE(ulbuf[34], output, 4);
        this.PUT_ULONG_BE(ulbuf[33], output, 8);
        this.PUT_ULONG_BE(ulbuf[32], output, 12);
 
    }
 
 
 
    this.sm4_crypt_ecb=function(ctx,input){
        if (input == null){
            alert("input is null!");
        }
        if ((ctx.isPadding) && (ctx.mode == this.SM4_ENCRYPT)){
            input = this.padding(input, this.SM4_ENCRYPT);
        }
 
        var i=0;
        var length = input.length;
        var bous = new Array();
        for(; length > 0; length -= 16)
        {
            var out = new Array(16);
            var ins=input.slice(i*16,(16*(i+1)));
            this.sm4_one_round(ctx.sk, ins, out)
            bous=bous.concat(out);
            i++;
        }
 
        var output = bous;
        if (ctx.isPadding && ctx.mode == this.SM4_DECRYPT)
        {
            output = this.padding(output, this.SM4_DECRYPT);
        }
        for(var i=0;i 0; length -= 16){
                var out = new Array(16);
                var out1 = new Array(16);
                var ins=input.slice(k*16,(16*(k+1)));
 
                for (i = 0; i < 16; i++)
                {
                    out[i] = (ins[i] ^ iv[i]);
                }
                this.sm4_one_round(ctx.sk, out, out1);
                iv=out1.slice(0,16);
                bous=bous.concat(out1);
                k++;
            }
        }
        else
        {
            var temp = [];
            var k=0;
            for(; length > 0; length -= 16)
            {
                var out = new Array(16);
                var out1 = new Array(16);
                var ins=input.slice(k*16,(16*(k+1)));
                temp=ins.slice(0,16);
                sm4_one_round(ctx.sk, ins, out);
                for (i = 0; i < 16; i++)
                {
                    out1[i] = (out[i] ^ iv[i]);
                }
                iv=temp.slice(0,16);
                bous=bous.concat(out1);
                k++;
            }
        }
 
        var output = bous;
        if (ctx.isPadding && ctx.mode == this.SM4_DECRYPT)
        {
            output = this.padding(output, this.SM4_DECRYPT);
        }
 
        for(var i=0;i 0)
            {
                cipherText.replace(/(\s*|\t|\r|\n)/g, "");
            }
            return cipherText;
        }catch (e){
            console.error(e);
            return null;
        }
 
    }
    // CBC模式加密
    this.encryptData_CBC=function(plainText){
        try{
            var sm4 = new SM4();
            var ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = sm4.SM4_ENCRYPT;
 
            var keyBytes = stringToByte(this.secretKey) ;
            var ivBytes= stringToByte(this.iv) ;
 
            sm4.sm4_setkey_enc(ctx, keyBytes);
            var encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, stringToByte(plainText));
            var cipherText = base64js.fromByteArray(encrypted);
            if (cipherText != null && cipherText.trim().length > 0)
            {
                cipherText.replace(/(\s*|\t|\r|\n)/g, "");
            }
            return cipherText;
        }
        catch ( e)
        {
            console.error(e);
            return null;
        }
    }
 
    stringToByte=function(str) {
        var bytes = new Array();
        var len, c;
        len = str.length;
        for(var i = 0; i < len; i++) {
            c = str.charCodeAt(i);
            if(c >= 0x010000 && c <= 0x10FFFF) {
                bytes.push(((c >> 18) & 0x07) | 0xF0);
                bytes.push(((c >> 12) & 0x3F) | 0x80);
                bytes.push(((c >> 6) & 0x3F) | 0x80);
                bytes.push((c & 0x3F) | 0x80);
            } else if(c >= 0x000800 && c <= 0x00FFFF) {
                bytes.push(((c >> 12) & 0x0F) | 0xE0);
                bytes.push(((c >> 6) & 0x3F) | 0x80);
                bytes.push((c & 0x3F) | 0x80);
            } else if(c >= 0x000080 && c <= 0x0007FF) {
                bytes.push(((c >> 6) & 0x1F) | 0xC0);
                bytes.push((c & 0x3F) | 0x80);
            } else {
                bytes.push(c & 0xFF);
            }
        }
        return bytes;
    }
 
 
    byteToString=function(arr) {
        if(typeof arr === 'string') {
            return arr;
        }
        var str = '',
            _arr = arr;
        for(var i = 0; i < _arr.length; i++) {
            var one = _arr[i].toString(2),
                v = one.match(/^1+?(?=0)/);
            if(v && one.length == 8) {
                var bytesLength = v[0].length;
                var store = _arr[i].toString(2).slice(7 - bytesLength);
                for(var st = 1; st < bytesLength; st++) {
                    store += _arr[st + i].toString(2).slice(2);
                }
                str += String.fromCharCode(parseInt(store, 2));
                i += bytesLength - 1;
            } else {
                str += String.fromCharCode(_arr[i]);
            }
        }
        return str;
    }
};

二、Java后端

SM4.java

package cn.com.sinosoft.cas.util.sm4;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

/**
 * sm4加密解密
 * @author wzk
 *
 */
public class SM4 {
    public static final int SM4_ENCRYPT = 1;

    public static final int SM4_DECRYPT = 0;

    private int GET_ULONG_BE(byte[] b, int i) {
        int n = (int) (b[i] & 0xff) << 24 | (int) ((b[i + 1] & 0xff) << 16) | (int) ((b[i + 2] & 0xff) << 8)
                | (int) (b[i + 3] & 0xff) & 0xffffffff;
        return n;
    }

    private void PUT_ULONG_BE(int n, byte[] b, int i) {
        b[i] = (byte) (int) (0xFF & n >> 24);
        b[i + 1] = (byte) (int) (0xFF & n >> 16);
        b[i + 2] = (byte) (int) (0xFF & n >> 8);
        b[i + 3] = (byte) (int) (0xFF & n);
    }

    private int SHL(int x, int n) {
        return (x & 0xFFFFFFFF) << n;
    }

    private int ROTL(int x, int n) {
        return SHL(x, n) | x >> (32 - n);
    }

    public static final byte[] SboxTable = { (byte) 0xd6, (byte) 0x90, (byte) 0xe9, (byte) 0xfe, (byte) 0xcc,
            (byte) 0xe1, 0x3d, (byte) 0xb7, 0x16, (byte) 0xb6, 0x14, (byte) 0xc2, 0x28, (byte) 0xfb, 0x2c, 0x05, 0x2b,
            0x67, (byte) 0x9a, 0x76, 0x2a, (byte) 0xbe, 0x04, (byte) 0xc3, (byte) 0xaa, 0x44, 0x13, 0x26, 0x49,
            (byte) 0x86, 0x06, (byte) 0x99, (byte) 0x9c, 0x42, 0x50, (byte) 0xf4, (byte) 0x91, (byte) 0xef, (byte) 0x98,
            0x7a, 0x33, 0x54, 0x0b, 0x43, (byte) 0xed, (byte) 0xcf, (byte) 0xac, 0x62, (byte) 0xe4, (byte) 0xb3, 0x1c,
            (byte) 0xa9, (byte) 0xc9, 0x08, (byte) 0xe8, (byte) 0x95, (byte) 0x80, (byte) 0xdf, (byte) 0x94,
            (byte) 0xfa, 0x75, (byte) 0x8f, 0x3f, (byte) 0xa6, 0x47, 0x07, (byte) 0xa7, (byte) 0xfc, (byte) 0xf3, 0x73,
            0x17, (byte) 0xba, (byte) 0x83, 0x59, 0x3c, 0x19, (byte) 0xe6, (byte) 0x85, 0x4f, (byte) 0xa8, 0x68, 0x6b,
            (byte) 0x81, (byte) 0xb2, 0x71, 0x64, (byte) 0xda, (byte) 0x8b, (byte) 0xf8, (byte) 0xeb, 0x0f, 0x4b, 0x70,
            0x56, (byte) 0x9d, 0x35, 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, (byte) 0xd1, (byte) 0xa2, 0x25, 0x22, 0x7c,
            0x3b, 0x01, 0x21, 0x78, (byte) 0x87, (byte) 0xd4, 0x00, 0x46, 0x57, (byte) 0x9f, (byte) 0xd3, 0x27, 0x52,
            0x4c, 0x36, 0x02, (byte) 0xe7, (byte) 0xa0, (byte) 0xc4, (byte) 0xc8, (byte) 0x9e, (byte) 0xea, (byte) 0xbf,
            (byte) 0x8a, (byte) 0xd2, 0x40, (byte) 0xc7, 0x38, (byte) 0xb5, (byte) 0xa3, (byte) 0xf7, (byte) 0xf2,
            (byte) 0xce, (byte) 0xf9, 0x61, 0x15, (byte) 0xa1, (byte) 0xe0, (byte) 0xae, 0x5d, (byte) 0xa4, (byte) 0x9b,
            0x34, 0x1a, 0x55, (byte) 0xad, (byte) 0x93, 0x32, 0x30, (byte) 0xf5, (byte) 0x8c, (byte) 0xb1, (byte) 0xe3,
            0x1d, (byte) 0xf6, (byte) 0xe2, 0x2e, (byte) 0x82, 0x66, (byte) 0xca, 0x60, (byte) 0xc0, 0x29, 0x23,
            (byte) 0xab, 0x0d, 0x53, 0x4e, 0x6f, (byte) 0xd5, (byte) 0xdb, 0x37, 0x45, (byte) 0xde, (byte) 0xfd,
            (byte) 0x8e, 0x2f, 0x03, (byte) 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51, (byte) 0x8d, 0x1b, (byte) 0xaf,
            (byte) 0x92, (byte) 0xbb, (byte) 0xdd, (byte) 0xbc, 0x7f, 0x11, (byte) 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a,
            (byte) 0xd8, 0x0a, (byte) 0xc1, 0x31, (byte) 0x88, (byte) 0xa5, (byte) 0xcd, 0x7b, (byte) 0xbd, 0x2d, 0x74,
            (byte) 0xd0, 0x12, (byte) 0xb8, (byte) 0xe5, (byte) 0xb4, (byte) 0xb0, (byte) 0x89, 0x69, (byte) 0x97, 0x4a,
            0x0c, (byte) 0x96, 0x77, 0x7e, 0x65, (byte) 0xb9, (byte) 0xf1, 0x09, (byte) 0xc5, 0x6e, (byte) 0xc6,
            (byte) 0x84, 0x18, (byte) 0xf0, 0x7d, (byte) 0xec, 0x3a, (byte) 0xdc, 0x4d, 0x20, 0x79, (byte) 0xee, 0x5f,
            0x3e, (byte) 0xd7, (byte) 0xcb, 0x39, 0x48 };

    public static final int[] FK = { 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc };

    public static final int[] CK = { 0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269, 0x70777e85, 0x8c939aa1, 0xa8afb6bd,
            0xc4cbd2d9, 0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249, 0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
            0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229, 0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299, 0xa0a7aeb5,
            0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209, 0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279 };

    private byte sm4Sbox(byte inch) {
        int i = inch & 0xFF;
        byte retVal = SboxTable[i];
        return retVal;
    }

    private int sm4Lt(int ka) {
        int bb = 0;
        int c = 0;
        byte[] a = new byte[4];
        byte[] b = new byte[4];
        PUT_ULONG_BE(ka, a, 0);
        b[0] = sm4Sbox(a[0]);
        b[1] = sm4Sbox(a[1]);
        b[2] = sm4Sbox(a[2]);
        b[3] = sm4Sbox(a[3]);
        bb = GET_ULONG_BE(b, 0);
        c = bb ^ ROTL(bb, 2) ^ ROTL(bb, 10) ^ ROTL(bb, 18) ^ ROTL(bb, 24);
        return c;
    }

    private int sm4F(int x0, int x1, int x2, int x3, int rk) {
        return x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk);
    }

    private int sm4CalciRK(int ka) {
        int bb = 0;
        int rk = 0;
        byte[] a = new byte[4];
        byte[] b = new byte[4];
        PUT_ULONG_BE(ka, a, 0);
        b[0] = sm4Sbox(a[0]);
        b[1] = sm4Sbox(a[1]);
        b[2] = sm4Sbox(a[2]);
        b[3] = sm4Sbox(a[3]);
        bb = GET_ULONG_BE(b, 0);
        rk = bb ^ ROTL(bb, 13) ^ ROTL(bb, 23);
        return rk;
    }

    private void sm4_setkey(int[] SK, byte[] key) {
        int[] MK = new int[4];
        int[] k = new int[36];
        int i = 0;
        MK[0] = GET_ULONG_BE(key, 0);
        MK[1] = GET_ULONG_BE(key, 4);
        MK[2] = GET_ULONG_BE(key, 8);
        MK[3] = GET_ULONG_BE(key, 12);
        k[0] = MK[0] ^ (int) FK[0];
        k[1] = MK[1] ^ (int) FK[1];
        k[2] = MK[2] ^ (int) FK[2];
        k[3] = MK[3] ^ (int) FK[3];
        for (; i < 32; i++) {
            k[(i + 4)] = (k[i] ^ sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ (int) CK[i]));
            SK[i] = k[(i + 4)];
        }
    }

    private void sm4_one_round(int[] sk, byte[] input, byte[] output) {
        int i = 0;
        int[] ulbuf = new int[36];
        ulbuf[0] = GET_ULONG_BE(input, 0);
        ulbuf[1] = GET_ULONG_BE(input, 4);
        ulbuf[2] = GET_ULONG_BE(input, 8);
        ulbuf[3] = GET_ULONG_BE(input, 12);
        while (i < 32) {
            ulbuf[(i + 4)] = sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);
            i++;
        }
        PUT_ULONG_BE(ulbuf[35], output, 0);
        PUT_ULONG_BE(ulbuf[34], output, 4);
        PUT_ULONG_BE(ulbuf[33], output, 8);
        PUT_ULONG_BE(ulbuf[32], output, 12);
    }

    private byte[] padding(byte[] input, int mode) {
        if (input == null) {
            return null;
        }

        byte[] ret = (byte[]) null;
        if (mode == SM4_ENCRYPT) {
            int p = 16 - input.length % 16;
            ret = new byte[input.length + p];
            System.arraycopy(input, 0, ret, 0, input.length);
            for (int i = 0; i < p; i++) {
                ret[input.length + i] = (byte) p;
            }
        } else {
            int p = input[input.length - 1];
            ret = new byte[input.length - p];
            System.arraycopy(input, 0, ret, 0, input.length - p);
        }
        return ret;
    }

    public void sm4_setkey_enc(SM4_Context ctx, byte[] key) throws Exception {
        if (ctx == null) {
            throw new Exception("ctx is null!");
        }

        if (key == null || key.length != 16) {
            throw new Exception("key error!");
        }

        ctx.mode = SM4_ENCRYPT;
        sm4_setkey(ctx.sk, key);
    }

    public byte[] sm4_crypt_ecb(SM4_Context ctx, byte[] input) throws Exception {
        if (input == null) {
            throw new Exception("input is null!");
        }

        if ((ctx.isPadding) && (ctx.mode == SM4_ENCRYPT)) {
            input = padding(input, SM4_ENCRYPT);
        }

        int length = input.length;
        ByteArrayInputStream bins = new ByteArrayInputStream(input);
        ByteArrayOutputStream bous = new ByteArrayOutputStream();
        for (; length > 0; length -= 16) {
            byte[] in = new byte[16];
            byte[] out = new byte[16];
            bins.read(in);
            sm4_one_round(ctx.sk, in, out);
            bous.write(out);
        }

        byte[] output = bous.toByteArray();
        if (ctx.isPadding && ctx.mode == SM4_DECRYPT) {
            output = padding(output, SM4_DECRYPT);
        }
        bins.close();
        bous.close();
        return output;
    }

    public void sm4_setkey_dec(SM4_Context ctx, byte[] key) throws Exception {
        if (ctx == null) {
            throw new Exception("ctx is null!");
        }

        if (key == null || key.length != 16) {
            throw new Exception("key error!");
        }

        int i = 0;
        ctx.mode = SM4_DECRYPT;
        sm4_setkey(ctx.sk, key);
        for (i = 0; i < 16; i++) {
            SWAP(ctx.sk, i);
        }
    }

    private void SWAP(int[] sk, int i) {
        int t = sk[i];
        sk[i] = sk[(31 - i)];
        sk[(31 - i)] = t;
    }

    public byte[] sm4_crypt_cbc(SM4_Context ctx, byte[] iv, byte[] input) throws Exception {
        if (iv == null || iv.length != 16) {
            throw new Exception("iv error!");
        }

        if (input == null) {
            throw new Exception("input is null!");
        }

        if (ctx.isPadding && ctx.mode == SM4_ENCRYPT) {
            input = padding(input, SM4_ENCRYPT);
        }

        int i = 0;
        int length = input.length;
        ByteArrayInputStream bins = new ByteArrayInputStream(input);
        ByteArrayOutputStream bous = new ByteArrayOutputStream();
        if (ctx.mode == SM4_ENCRYPT) {
            for (; length > 0; length -= 16) {
                byte[] in = new byte[16];
                byte[] out = new byte[16];
                byte[] out1 = new byte[16];

                bins.read(in);
                for (i = 0; i < 16; i++) {
                    out[i] = ((byte) (in[i] ^ iv[i]));
                }
                sm4_one_round(ctx.sk, out, out1);
                System.arraycopy(out1, 0, iv, 0, 16);
                bous.write(out1);
            }
        } else {
            byte[] temp = new byte[16];
            for (; length > 0; length -= 16) {
                byte[] in = new byte[16];
                byte[] out = new byte[16];
                byte[] out1 = new byte[16];

                bins.read(in);
                System.arraycopy(in, 0, temp, 0, 16);
                sm4_one_round(ctx.sk, in, out);
                for (i = 0; i < 16; i++) {
                    out1[i] = ((byte) (out[i] ^ iv[i]));
                }
                System.arraycopy(temp, 0, iv, 0, 16);
                bous.write(out1);
            }
        }

        byte[] output = bous.toByteArray();
        if (ctx.isPadding && ctx.mode == SM4_DECRYPT) {
            output = padding(output, SM4_DECRYPT);
        }
        bins.close();
        bous.close();
        return output;
    }

}

SM4_Context.java

package cn.com.sinosoft.cas.util.sm4;

/**
 * sm4加密解密
 * @author wzk
 *
 */
public class SM4_Context {
    public int mode;

    public int[] sk;

    public boolean isPadding;

    public SM4_Context() {
        this.mode = 1;
        this.isPadding = true;
        this.sk = new int[32];
    }
}

Util.java

package cn.com.sinosoft.cas.util.sm4;

import java.math.BigInteger;

/**
 * sm4加密解密工具类
 * @author wzk
 *
 */
public class Util {
    /**
     * 整形转换成网络传输的字节流(字节数组)型数据
     *
     * @param num
     *            一个整型数据
     * @return 4个字节的自己数组
     */
    public static byte[] intToBytes(int num) {
        byte[] bytes = new byte[4];
        bytes[0] = (byte) (0xff & (num >> 0));
        bytes[1] = (byte) (0xff & (num >> 8));
        bytes[2] = (byte) (0xff & (num >> 16));
        bytes[3] = (byte) (0xff & (num >> 24));
        return bytes;
    }

    /**
     * 四个字节的字节数据转换成一个整形数据
     *
     * @param bytes
     *            4个字节的字节数组
     * @return 一个整型数据
     */
    public static int byteToInt(byte[] bytes) {
        int num = 0;
        int temp;
        temp = (0x000000ff & (bytes[0])) << 0;
        num = num | temp;
        temp = (0x000000ff & (bytes[1])) << 8;
        num = num | temp;
        temp = (0x000000ff & (bytes[2])) << 16;
        num = num | temp;
        temp = (0x000000ff & (bytes[3])) << 24;
        num = num | temp;
        return num;
    }

    /**
     * 长整形转换成网络传输的字节流(字节数组)型数据
     *
     * @param num
     *            一个长整型数据
     * @return 4个字节的自己数组
     */
    public static byte[] longToBytes(long num) {
        byte[] bytes = new byte[8];
        for (int i = 0; i < 8; i++) {
            bytes[i] = (byte) (0xff & (num >> (i * 8)));
        }

        return bytes;
    }

    /**
     * 大数字转换字节流(字节数组)型数据
     *
     * @param n
     * @return
     */
    public static byte[] byteConvert32Bytes(BigInteger n) {
        byte tmpd[] = (byte[]) null;
        if (n == null) {
            return null;
        }

        if (n.toByteArray().length == 33) {
            tmpd = new byte[32];
            System.arraycopy(n.toByteArray(), 1, tmpd, 0, 32);
        } else if (n.toByteArray().length == 32) {
            tmpd = n.toByteArray();
        } else {
            tmpd = new byte[32];
            for (int i = 0; i < 32 - n.toByteArray().length; i++) {
                tmpd[i] = 0;
            }
            System.arraycopy(n.toByteArray(), 0, tmpd, 32 - n.toByteArray().length, n.toByteArray().length);
        }
        return tmpd;
    }

    /**
     * 换字节流(字节数组)型数据转大数字
     *
     * @param b
     * @return
     */
    public static BigInteger byteConvertInteger(byte[] b) {
        if (b[0] < 0) {
            byte[] temp = new byte[b.length + 1];
            temp[0] = 0;
            System.arraycopy(b, 0, temp, 1, b.length);
            return new BigInteger(temp);
        }
        return new BigInteger(b);
    }

    /**
     * 根据字节数组获得值(十六进制数字)
     *
     * @param bytes
     * @return
     */
    public static String getHexString(byte[] bytes) {
        return getHexString(bytes, true);
    }

    /**
     * 根据字节数组获得值(十六进制数字)
     *
     * @param bytes
     * @param upperCase
     * @return
     */
    public static String getHexString(byte[] bytes, boolean upperCase) {
        String ret = "";
        for (int i = 0; i < bytes.length; i++) {
            ret += Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1);
        }
        return upperCase ? ret.toUpperCase() : ret;
    }

    /**
     * 打印十六进制字符串
     *
     * @param bytes
     */
    public static void printHexString(byte[] bytes) {
        for (int i = 0; i < bytes.length; i++) {
            String hex = Integer.toHexString(bytes[i] & 0xFF);
            if (hex.length() == 1) {
                hex = '0' + hex;
            }
            System.out.print("0x" + hex.toUpperCase() + ",");
        }
        System.out.println("");
    }

    /**
     * Convert hex string to byte[]
     *
     * @param hexString
     *            the hex string
     * @return byte[]
     */
    public static byte[] hexStringToBytes(String hexString) {
        if (hexString == null || hexString.equals("")) {
            return null;
        }

        hexString = hexString.toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] d = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return d;
    }

    /**
     * Convert char to byte
     *
     * @param c
     *            char
     * @return byte
     */
    public static byte charToByte(char c) {
        return (byte) "0123456789ABCDEF".indexOf(c);
    }

    /**
     * 用于建立十六进制字符的输出的小写字符数组
     */
    private static final char[] DIGITS_LOWER = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
            'e', 'f' };

    /**
     * 用于建立十六进制字符的输出的大写字符数组
     */
    private static final char[] DIGITS_UPPER = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
            'E', 'F' };

    /**
     * 将字节数组转换为十六进制字符数组
     *
     * @param data
     *            byte[]
     * @return 十六进制char[]
     */
    public static char[] encodeHex(byte[] data) {
        return encodeHex(data, true);
    }

    /**
     * 将字节数组转换为十六进制字符数组
     *
     * @param data
     *            byte[]
     * @param toLowerCase
     *            true 传换成小写格式 , false 传换成大写格式
     * @return 十六进制char[]
     */
    public static char[] encodeHex(byte[] data, boolean toLowerCase) {
        return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
    }

    /**
     * 将字节数组转换为十六进制字符数组
     *
     * @param data
     *            byte[]
     * @param toDigits
     *            用于控制输出的char[]
     * @return 十六进制char[]
     */
    protected static char[] encodeHex(byte[] data, char[] toDigits) {
        int l = data.length;
        char[] out = new char[l << 1];
        // two characters form the hex value.
        for (int i = 0, j = 0; i < l; i++) {
            out[j++] = toDigits[(0xF0 & data[i]) >>> 4];
            out[j++] = toDigits[0x0F & data[i]];
        }
        return out;
    }

    /**
     * 将字节数组转换为十六进制字符串
     *
     * @param data
     *            byte[]
     * @return 十六进制String
     */
    public static String encodeHexString(byte[] data) {
        return encodeHexString(data, true);
    }

    /**
     * 将字节数组转换为十六进制字符串
     *
     * @param data
     *            byte[]
     * @param toLowerCase
     *            true 传换成小写格式 , false 传换成大写格式
     * @return 十六进制String
     */
    public static String encodeHexString(byte[] data, boolean toLowerCase) {
        return encodeHexString(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
    }

    /**
     * 将字节数组转换为十六进制字符串
     *
     * @param data
     *            byte[]
     * @param toDigits
     *            用于控制输出的char[]
     * @return 十六进制String
     */
    protected static String encodeHexString(byte[] data, char[] toDigits) {
        return new String(encodeHex(data, toDigits));
    }

    /**
     * 将十六进制字符数组转换为字节数组
     *
     * @param data
     *            十六进制char[]
     * @return byte[]
     * @throws RuntimeException
     *             如果源十六进制字符数组是一个奇怪的长度,将抛出运行时异常
     */
    public static byte[] decodeHex(char[] data) {
        int len = data.length;

        if ((len & 0x01) != 0) {
            throw new RuntimeException("Odd number of characters.");
        }

        byte[] out = new byte[len >> 1];

        // two characters form the hex value.
        for (int i = 0, j = 0; j < len; i++) {
            int f = toDigit(data[j], j) << 4;
            j++;
            f = f | toDigit(data[j], j);
            j++;
            out[i] = (byte) (f & 0xFF);
        }

        return out;
    }

    /**
     * 将十六进制字符转换成一个整数
     *
     * @param ch
     *            十六进制char
     * @param index
     *            十六进制字符在字符数组中的位置
     * @return 一个整数
     * @throws RuntimeException
     *             当ch不是一个合法的十六进制字符时,抛出运行时异常
     */
    protected static int toDigit(char ch, int index) {
        int digit = Character.digit(ch, 16);
        if (digit == -1) {
            throw new RuntimeException("Illegal hexadecimal character " + ch + " at index " + index);
        }
        return digit;
    }

    /**
     * 数字字符串转ASCII码字符串
     *
     * @param String
     *            字符串
     * @return ASCII字符串
     */
    public static String StringToAsciiString(String content) {
        String result = "";
        int max = content.length();
        for (int i = 0; i < max; i++) {
            char c = content.charAt(i);
            String b = Integer.toHexString(c);
            result = result + b;
        }
        return result;
    }

    /**
     * 十六进制转字符串
     *
     * @param hexString
     *            十六进制字符串
     * @param encodeType
     *            编码类型4:Unicode,2:普通编码
     * @return 字符串
     */
    public static String hexStringToString(String hexString, int encodeType) {
        String result = "";
        int max = hexString.length() / encodeType;
        for (int i = 0; i < max; i++) {
            char c = (char) hexStringToAlgorism(hexString.substring(i * encodeType, (i + 1) * encodeType));
            result += c;
        }
        return result;
    }

    /**
     * 十六进制字符串装十进制
     *
     * @param hex
     *            十六进制字符串
     * @return 十进制数值
     */
    public static int hexStringToAlgorism(String hex) {
        hex = hex.toUpperCase();
        int max = hex.length();
        int result = 0;
        for (int i = max; i > 0; i--) {
            char c = hex.charAt(i - 1);
            int algorism = 0;
            if (c >= '0' && c <= '9') {
                algorism = c - '0';
            } else {
                algorism = c - 55;
            }
            result += Math.pow(16, max - i) * algorism;
        }
        return result;
    }

    /**
     * 十六转二进制
     *
     * @param hex
     *            十六进制字符串
     * @return 二进制字符串
     */
    public static String hexStringToBinary(String hex) {
        hex = hex.toUpperCase();
        String result = "";
        int max = hex.length();
        for (int i = 0; i < max; i++) {
            char c = hex.charAt(i);
            switch (c) {
            case '0':
                result += "0000";
                break;
            case '1':
                result += "0001";
                break;
            case '2':
                result += "0010";
                break;
            case '3':
                result += "0011";
                break;
            case '4':
                result += "0100";
                break;
            case '5':
                result += "0101";
                break;
            case '6':
                result += "0110";
                break;
            case '7':
                result += "0111";
                break;
            case '8':
                result += "1000";
                break;
            case '9':
                result += "1001";
                break;
            case 'A':
                result += "1010";
                break;
            case 'B':
                result += "1011";
                break;
            case 'C':
                result += "1100";
                break;
            case 'D':
                result += "1101";
                break;
            case 'E':
                result += "1110";
                break;
            case 'F':
                result += "1111";
                break;
            }
        }
        return result;
    }

    /**
     * ASCII码字符串转数字字符串
     *
     * @param String
     *            ASCII字符串
     * @return 字符串
     */
    public static String AsciiStringToString(String content) {
        String result = "";
        int length = content.length() / 2;
        for (int i = 0; i < length; i++) {
            String c = content.substring(i * 2, i * 2 + 2);
            int a = hexStringToAlgorism(c);
            char b = (char) a;
            String d = String.valueOf(b);
            result += d;
        }
        return result;
    }

    /**
     * 将十进制转换为指定长度的十六进制字符串
     *
     * @param algorism
     *            int 十进制数字
     * @param maxLength
     *            int 转换后的十六进制字符串长度
     * @return String 转换后的十六进制字符串
     */
    public static String algorismToHexString(int algorism, int maxLength) {
        String result = "";
        result = Integer.toHexString(algorism);

        if (result.length() % 2 == 1) {
            result = "0" + result;
        }
        return patchHexString(result.toUpperCase(), maxLength);
    }

    /**
     * 字节数组转为普通字符串(ASCII对应的字符)
     *
     * @param bytearray
     *            byte[]
     * @return String
     */
    public static String byteToString(byte[] bytearray) {
        String result = "";
        char temp;

        int length = bytearray.length;
        for (int i = 0; i < length; i++) {
            temp = (char) bytearray[i];
            result += temp;
        }
        return result;
    }

    /**
     * 二进制字符串转十进制
     *
     * @param binary
     *            二进制字符串
     * @return 十进制数值
     */
    public static int binaryToAlgorism(String binary) {
        int max = binary.length();
        int result = 0;
        for (int i = max; i > 0; i--) {
            char c = binary.charAt(i - 1);
            int algorism = c - '0';
            result += Math.pow(2, max - i) * algorism;
        }
        return result;
    }

    /**
     * 十进制转换为十六进制字符串
     *
     * @param algorism
     *            int 十进制的数字
     * @return String 对应的十六进制字符串
     */
    public static String algorismToHEXString(int algorism) {
        String result = "";
        result = Integer.toHexString(algorism);

        if (result.length() % 2 == 1) {
            result = "0" + result;

        }
        result = result.toUpperCase();

        return result;
    }

    /**
     * HEX字符串前补0,主要用于长度位数不足。
     *
     * @param str
     *            String 需要补充长度的十六进制字符串
     * @param maxLength
     *            int 补充后十六进制字符串的长度
     * @return 补充结果
     */
    static public String patchHexString(String str, int maxLength) {
        String temp = "";
        for (int i = 0; i < maxLength - str.length(); i++) {
            temp = "0" + temp;
        }
        str = (temp + str).substring(0, maxLength);
        return str;
    }

    /**
     * 将一个字符串转换为int
     *
     * @param s
     *            String 要转换的字符串
     * @param defaultInt
     *            int 如果出现异常,默认返回的数字
     * @param radix
     *            int 要转换的字符串是什么进制的,如16 8 10.
     * @return int 转换后的数字
     */
    public static int parseToInt(String s, int defaultInt, int radix) {
        int i = 0;
        try {
            i = Integer.parseInt(s, radix);
        } catch (NumberFormatException ex) {
            i = defaultInt;
        }
        return i;
    }

    /**
     * 将一个十进制形式的数字字符串转换为int
     *
     * @param s
     *            String 要转换的字符串
     * @param defaultInt
     *            int 如果出现异常,默认返回的数字
     * @return int 转换后的数字
     */
    public static int parseToInt(String s, int defaultInt) {
        int i = 0;
        try {
            i = Integer.parseInt(s);
        } catch (NumberFormatException ex) {
            i = defaultInt;
        }
        return i;
    }

    /**
     * 十六进制串转化为byte数组
     *
     * @return the array of byte
     */
    public static byte[] hexToByte(String hex) throws IllegalArgumentException {
        if (hex.length() % 2 != 0) {
            throw new IllegalArgumentException();
        }
        char[] arr = hex.toCharArray();
        byte[] b = new byte[hex.length() / 2];
        for (int i = 0, j = 0, l = hex.length(); i < l; i++, j++) {
            String swap = "" + arr[i++] + arr[i];
            int byteint = Integer.parseInt(swap, 16) & 0xFF;
            b[j] = new Integer(byteint).byteValue();
        }
        return b;
    }

    /**
     * 字节数组转换为十六进制字符串
     *
     * @param b
     *            byte[] 需要转换的字节数组
     * @return String 十六进制字符串
     */
    public static String byteToHex(byte b[]) {
        if (b == null) {
            throw new IllegalArgumentException("Argument b ( byte array ) is null! ");
        }
        String hs = "";
        String stmp = "";
        for (int n = 0; n < b.length; n++) {
            stmp = Integer.toHexString(b[n] & 0xff);
            if (stmp.length() == 1) {
                hs = hs + "0" + stmp;
            } else {
                hs = hs + stmp;
            }
        }
        return hs.toUpperCase();
    }

    public static byte[] subByte(byte[] input, int startIndex, int length) {
        byte[] bt = new byte[length];
        for (int i = 0; i < length; i++) {
            bt[i] = input[i + startIndex];
        }
        return bt;
    }
}

SM4Utils.java

package cn.com.sinosoft.cas.util.sm4;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.UnsupportedEncodingException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * sm4加密解密
 * CBC、ECB模式
 * @author wzk
 *
 */
@SuppressWarnings("restriction")
public class SM4Utils {
    /**
     * 和前端key一致
     */
    private static String secretKey = "1111111111111111";
    /**
     * 和前端iv一致
     */
    private static String iv = "1111111111111111";
    
    private static String UTF_8 = "UTF-8";
    
    private static final boolean hexString = false;

    public SM4Utils() {
    }
    // ECB模式加密
    public static String encryptData_ECB(String plainText) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_ENCRYPT;

            byte[] keyBytes;
            keyBytes = secretKey.getBytes();
            SM4 sm4 = new SM4();
            sm4.sm4_setkey_enc(ctx, keyBytes);
            byte[] encrypted = sm4.sm4_crypt_ecb(ctx, plainText.getBytes(UTF_8));
            String cipherText = new BASE64Encoder().encode(encrypted);
            if (cipherText != null && cipherText.trim().length() > 0) {
                Pattern p = Pattern.compile("\\s*|\t|\r|\n");
                Matcher m = p.matcher(cipherText);
                cipherText = m.replaceAll("");
            }
            return cipherText;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    // ECB模式解密
    public static String decryptData_ECB(String cipherText) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_DECRYPT;

            byte[] keyBytes;
            keyBytes = secretKey.getBytes();
            SM4 sm4 = new SM4();
            sm4.sm4_setkey_dec(ctx, keyBytes);
            byte[] decrypted = sm4.sm4_crypt_ecb(ctx, new BASE64Decoder().decodeBuffer(cipherText));
            return new String(decrypted, UTF_8);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    // CBC模式加密
    public static String encryptData_CBC(String plainText) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_ENCRYPT;

            byte[] keyBytes;
            byte[] ivBytes;

            keyBytes = secretKey.getBytes();
            ivBytes = iv.getBytes();

            SM4 sm4 = new SM4();
            sm4.sm4_setkey_enc(ctx, keyBytes);
            byte[] encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, plainText.getBytes(UTF_8));
            String cipherText = new BASE64Encoder().encode(encrypted);
            if (cipherText != null && cipherText.trim().length() > 0) {
                Pattern p = Pattern.compile("\\s*|\t|\r|\n");
                Matcher m = p.matcher(cipherText);
                cipherText = m.replaceAll("");
            }
            return cipherText;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    // CBC模式解密
    public static String decryptData_CBC(String cipherText) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_DECRYPT;

            byte[] keyBytes;
            byte[] ivBytes;
            if (hexString) {
                keyBytes = Util.hexStringToBytes(secretKey);
                ivBytes = Util.hexStringToBytes(iv);
            } else {
                keyBytes = secretKey.getBytes();
                ivBytes = iv.getBytes();
            }

            SM4 sm4 = new SM4();
            sm4.sm4_setkey_dec(ctx, keyBytes);
            byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, new BASE64Decoder().decodeBuffer(cipherText));
            return new String(decrypted, UTF_8);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) throws UnsupportedEncodingException {
        String plainText = "中科软";
        
        String cipherText = SM4Utils.encryptData_ECB(plainText);
        System.out.println("ECB模式加密密文: " + cipherText);
        
        plainText = SM4Utils.decryptData_ECB(cipherText);
        System.out.println("ECB模式解密明文: " + plainText);

        cipherText = SM4Utils.encryptData_CBC(plainText);
        System.out.println("CBC模式加密密文: " + cipherText);
        
        plainText = SM4Utils.decryptData_CBC(cipherText);
        System.out.println("CBC模式解密明文: " + plainText);

    }

}

 三、测试

1、CBC模式(双重盐,较为安全)
前端:
var sm4=new SM4Util();
sm4.encryptData_CBC('');

后端:
SM4Utils.decryptData_CBC("");

2、ECB模式
前端:
var sm4=new SM4Util();
sm4.encryptData_ECB('');

后端:
SM4Utils.decryptData_ECB("");

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