js加密解密

/**
 * base64js
 * base64js.toByteArray(d.input)
 * base64js.fromByteArray(c);
 *
 */
var base64js = function () {
    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; i < n.length; i++) {
            o(n[i])
        }
        return o
    }({
        "/": [function (r, e, t) {
            t.byteLength = c;
            t.toByteArray = v;
            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;
                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 += "="
                    }
                }
                i.push(f);
                return i.join("")
            }
        }, {}]
    }, {}, [])("/")
}();

/**
 * 国密SM4加密算法
 */
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_dec = 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_DECRYPT;
        this.sm4_setkey(ctx.sk, key);
        ctx.sk = ctx.sk.reverse();
    }

    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<output.length;i++){
            if(output[i]<0){
                output[i]=output[i]+256;
            }
        }
        return output;
    }
        
    this.sm4_crypt_cbc=function(ctx, iv, input){  
            if (iv == null || iv.length != 16) {  
                alert("iv error!");
            }  
                
            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();
            if (ctx.mode == this.SM4_ENCRYPT){
                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))); 
                    
                    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);
                    this.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<output.length;i++){
                if(output[i]<0){
                    output[i]=output[i]+256;
                }
            }             
            return output;  
    }  
}


export function SM4Util(iv,secretKey) {
    this.iv = iv;  
    this.secretKey = secretKey;
    this.hexString = false;

    this.encryptData_ECB=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);  
            sm4.sm4_setkey_enc(ctx, keyBytes);  
            var encrypted = sm4.sm4_crypt_ecb(ctx, 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;  
        } 
        
    }

    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;  
        }  
    }

    this.decryptData_ECB = function(cipherText){
        try{
            var sm4 = new SM4(); 

            var ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = sm4.SM4_DECRYPT;  

            var keyBytes = stringToByte(this.secretKey);
            
            sm4.sm4_setkey_dec(ctx, keyBytes);
            var decrypted = sm4.sm4_crypt_ecb(ctx, base64js.toByteArray(cipherText));
            return byteToString(decrypted);
        } catch (e){  
            console.error(e);
            return null;  
        }  
    }

    this.decryptData_CBC = function(cipherText){
        try{
            var sm4 = new SM4(); 

            var ctx = new SM4_Context();
            ctx.isPadding = true;           

            var keyBytes = stringToByte(this.secretKey);
            var ivBytes= stringToByte(this.iv) ;  

            sm4.sm4_setkey_dec(ctx, keyBytes);
            var decrypted = sm4.sm4_crypt_cbc(ctx,ivBytes, base64js.toByteArray(cipherText));
            return byteToString(decrypted);
        } catch (e){  
            console.error(e);
            return null;  
        }  
    }

    function stringToByte(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;
    }


    function byteToString(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;
    }
};

//使用
   let account = this.encrypt(this.user.account); //账号加密
 //加密
    encrypt(text) {
      const s4 = new SM4Util("eXvIrrYasIFQaSXr", "Pd3YT91MQOr8CaFR");
      // s4.secretKey = "Pd3YT91MQOr8CaFR";    //key就是自定义加密key，自己定义的简单串；
      // s4.iv = "eXvIrrYasIFQaSXr"   //iv是initialization vector的意思，就是加密的初始话矢量，
      // 初始化加密函数的变量，也叫初始向量。
      // （本来应该动态生成的，由于项目没有严格的加密要求，直接写死一个）
      return s4.encryptData_CBC(encodeURIComponent(text));
    },