国密SM4算法前端JavaScript后端Java加密解密完整代码1.前⾔
近期做国密改造，需要前后端采⽤混合加密，其中SM4算法⽹上资源很少，即使有也是前台JS和后台JAVA加解密不⼀致。最后到可靠的代码如下：
整合⼏位⼤神资源后实现SM4的前后端ECB模式/CBC模式加密解密。
2.前端JavaScript
2.1.代码输出截图：
2.2.完整代码：
<!DOCTYPE html<html>
<head>
<meta charset="UTF-8">
<title>SM4的加密解密</title>
</head>
<body>
<script type="text/javascript">
/**
* base64js
*/
(function(r){
if(typeof exports ==="object"&&typeof module !=="undefined"){
}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 +"'");
de ="MODULE_NOT_FOUND", d
}
var c = t[i]={
exports:{}
};
e[i][0].ports,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; i < n.length; i++){
o(n[i])
}
return o
}({
"/":[function(r, e, t){
t.byteLength = c;
t.fromByteArray = s;
var n =[];
var o =[];
var f =typeof Uint8Array !=="undefined"? Uint8Array : Array;
var i ="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
for(var a =0, u = i.length; a < u;++a){
n[a]= i[a];
o[i.charCodeAt(a)]= a
}
o["-".charCodeAt(0)]=62;
o["_".charCodeAt(0)]=63;
function d(r){
var e = r.length;
if(e %4>0){
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;
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 < t; e +=4){
n = o[r.charCodeAt(e)]<<18| o[r.charCodeAt(e +1)]<<12| o[r.charCodeAt(e +2)]<<6| o[r.charCodeAt(        e +3)];
a[c++]= n >>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; f < t; f +=3){
n =(r[f]<<16)+(r[f +1]<<8)+ r[f +2];
o.push(l(n))
}
return o.join("")
}
function s(r){
var e;
var t = r.length;
var o = t %3;
var f ="";
var i =[];
var a =16383;
for(var u =0, d = t - o; u < d; u += a){
i.push(h(r, u, u + a > d ? 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 +="="typeof array
}
}
i.push(f);
return i.join("")
}
}
},{}]
},{},[])("/")
});
/**
* 国密SM4加密算法
*/
function SM4_Context(){
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;
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;
}
this.sm4_setkey(ctx.sk, key);
};
//⽣成解密密钥
this.sm4_setkey_dec=function(ctx, key){
if(ctx ==null){
Error("ctx is null!");
}

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