2024年Web前端最新前端使用国密SM4进行加密、解密

码农世界 2024-05-21 前端 61 次浏览 0个评论

结束

一次完整的面试流程就是这样啦，小编综合了腾讯的面试题做了一份前端面试题PDF文档，里面有面试题的详细解析，分享给小伙伴们，有没有需要的小伙伴们都去领取！

开源分享：【大厂前端面试题解析+核心总结学习笔记+真实项目实战+最新讲解视频】

}
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)
    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

}

// function SM4Util(key = ‘1111111111111111’) {

function SM4Util() {

console.log(‘SM4Util key----’, key)

// 和后端key一致（key为密钥）

// this.secretKey = key

this.secretKey = ‘1111111111111111’

// 当时用CBC模式的时候

this.iv = ‘1111111111111111’

this.hexString = false

// ECB模式加密

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

}

// 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)

}

console.log(‘bytes----’, bytes)

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

}

### 2. body 标签上引入该文件

### 3. 使用 - ECB 模式加密

// 加密 - 使用默认秘钥 1111111111111111

var sm4 = new SM4Util();

sm4.encryptData_ECB(‘123’);

// 加密 - 使用自定义秘钥 93F3044B07393417A737E2CC389D01AF （需将 sm4.js 文件中SM4Util 函数处注释的代码打开）

var sm4 = new SM4Util(‘93F3044B07393417A737E2CC389D01AF’);

sm4.encryptData_ECB(‘123’); // 后端解密的好像对不上，

该加密办法参考博客 
## 【方法3】
### 1. 本地写 js 文件
`@/utils/SM4Util/index.js`

let base64js = require(‘./base64js’)

let Hex = require(‘./hex’)

let SM4 = require(‘./sm4’)

function SM4Util() {}

/**

* sm4 ecb 加密

* @param utf8Str

* @param utf8Key

SM4Util.sm4ECBEncrypt = function (utf8Str, utf8Key) {

if (!utf8Key) {

utf8Key = ‘zzfh!@#$QazxWsxc’

}

let sm4 = new SM4()

let keyBytes = Hex.utf8StrToBytes(utf8Key)

let contentBytes = Hex.utf8StrToBytes(utf8Str)

let cipher = sm4.encrypt_ecb(keyBytes, contentBytes)

return base64js.fromByteArray(cipher)

}

/**

* sm4 ecb 解密

* @param utf8Str

* @param utf8Key

SM4Util.sm4ECBDecrypt = function (base64Str, utf8Key) {

if (!utf8Key) {

utf8Key = ‘zzfh!@#$QazxWsxc’

}

let sm4 = new SM4()

let keyBytes = Hex.utf8StrToBytes(utf8Key)

let contentBytes = base64js.toByteArray(base64Str)

let plain = sm4.decrypt_ecb(keyBytes, contentBytes)

return Hex.bytesToUtf8Str(plain)

}

/**

* sm4 cbc 加密

* @param utf8Str

* @param utf8Key

* @param utf8Iv

SM4Util.sm4CBCEncrypt = function (utf8Str, utf8Key, utf8Iv) {

if (!utf8Key) {

utf8Key = ‘cmbtest1cmbtest1’

}

if (!utf8Iv) {

utf8Iv = ‘cmbtest1cmbtest1’

}

let sm4 = new SM4()

let keyBytes = Hex.utf8StrToBytes(utf8Key)

let ivBytes = Hex.utf8StrToBytes(utf8Iv)

let contentBytes = Hex.utf8StrToBytes(utf8Str)

let cipher = sm4.encrypt_cbc(keyBytes, ivBytes, contentBytes)

return base64js.fromByteArray(cipher)

}

/**

* sm4 cbc 解密

* @param utf8Str

* @param utf8Key

* @param utf8Iv

SM4Util.sm4CBCDecrypt = function (base64Str, utf8Key, utf8Iv) {

if (!utf8Key) {

utf8Key = ‘cmbtest1cmbtest1’

}

if (!utf8Iv) {

utf8Iv = ‘cmbtest1cmbtest1’

}

let sm4 = new SM4()

let keyBytes = Hex.utf8StrToBytes(utf8Key)

let ivBytes = Hex.utf8StrToBytes(utf8Iv)

let contentBytes = base64js.toByteArray(base64Str)

let plain = sm4.decrypt_cbc(keyBytes, ivBytes, contentBytes)

return Hex.bytesToUtf8Str(plain)

}

module.exports = SM4Util

`@/utils/SM4Util/base64js.js`

/**

* base64js

* base64js.toByteArray(utf8Str)

* base64js.fromByteArray(bytes);

;(function ® {

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 ® {

var t = e[i][1][r]

return o(t ? t : r)

c.exports,

)

}

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('')
      }
    },
    {}
  ]
},
{},
[]

)(‘/’)

})

`@/utils/SM4Util/hex.js`

function Hex() {}

/**

* 数组转为16进制字符串

* @param b 数组

* @param pos 指定位置

* @param len 长度

* @returns {string}

Hex.encode = function (b, pos, len) {

var hexCh = new Array(len * 2)

var hexCode = new Array(‘0’, ‘1’, ‘2’, ‘3’, ‘4’, ‘5’, ‘6’, ‘7’, ‘8’, ‘9’, ‘A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’)

for (var i = pos, j = 0; i < len + pos; i++, j++) {

hexCh[j] = hexCode[(b[i] & 0xff) >> 4]

hexCh[++j] = hexCode[b[i] & 0x0f]

}

return hexCh.join(‘’)

}

/**

* 16进制字符串转为字节数组

* @param hex

* @returns {any[]|null}

Hex.decode = function (hex) {

if (hex == null || hex == ‘’) {

return null

}

if (hex.length % 2 != 0) {

return null

}

var ascLen = hex.length / 2

var hexCh = this.toCharCodeArray(hex)

var asc = new Array(ascLen)

for (var i = 0; i < ascLen; i++) {

if (hexCh[2 * i] >= 0x30 && hexCh[2 * i] <= 0x39) {

asc[i] = (hexCh[2 * i] - 0x30) << 4

} else if (hexCh[2 * i] >= 0x41 && hexCh[2 * i] <= 0x46) {

//A-F : 0x41-0x46

asc[i] = (hexCh[2 * i] - 0x41 + 10) << 4

} else if (hexCh[2 * i] >= 0x61 && hexCh[2 * i] <= 0x66) {

//a-f : 0x61-0x66

asc[i] = (hexCh[2 * i] - 0x61 + 10) << 4

} else {

return null

}

if (hexCh[2 \* i + 1] >= 0x30 && hexCh[2 \* i + 1] <= 0x39) {
  asc[i] = asc[i] | (hexCh[2 \* i + 1] - 0x30)
} else if (hexCh[2 \* i + 1] >= 0x41 && hexCh[2 \* i + 1] <= 0x46) {
  asc[i] = asc[i] | (hexCh[2 \* i + 1] - 0x41 + 10)
} else if (hexCh[2 \* i + 1] >= 0x61 && hexCh[2 \* i + 1] <= 0x66) {
  asc[i] = asc[i] | (hexCh[2 \* i + 1] - 0x61 + 10)
} else {
  return null
}

}

return asc

}

/**

* utf8字符串转为字节数组

* @param utf8Str

* @returns {[]}

Hex.utf8StrToBytes = function (utf8Str) {

var ens = encodeURIComponent(utf8Str)

var es = unescape(ens)

var esLen = es.length

// Convert

var words = []

for (var i = 0; i < esLen; i++) {

words[i] = es.charCodeAt(i)

}

return words

}

/**

* 字节数组转为utf8字符串

* @param bytesArray

* @returns {string}

Hex.bytesToUtf8Str = function (bytesArray) {

var utf8Byte = bytesArray

var latin1Chars = []

for (var i = 0; i < utf8Byte.length; i++) {

latin1Chars.push(String.fromCharCode(utf8Byte[i]))

}

return decodeURIComponent(escape(latin1Chars.join(‘’)))

}

/**

* 16进制字符串转为utf8字符串

* @param utf8Str

* @returns {string}

Hex.hexToUtf8Str = function (utf8Str) {

var utf8Byte = Hex.decode(utf8Str)

var latin1Chars = []

for (var i = 0; i < utf8Byte.length; i++) {

latin1Chars.push(String.fromCharCode(utf8Byte[i]))

}

return decodeURIComponent(escape(latin1Chars.join(‘’)))

}

/**

* utf8字符串转为16进制字符串

* @param utf8Str

* @returns {string}

Hex.utf8StrToHex = function (utf8Str) {

var ens = encodeURIComponent(utf8Str)

var es = unescape(ens)

var esLen = es.length

// Convert

var words = []

for (var i = 0; i < esLen; i++) {

words[i] = es.charCodeAt(i).toString(16)

}

return words.join(‘’)

}

/**

* 字符串中每个字符转为数组中每个元素，数字，字母同Hex.utf8StrToBytes()方法

* @param chs

* @returns {any[]}

Hex.toCharCodeArray = function (chs) {

var chArr = new Array(chs.length)

for (var i = 0; i < chs.length; i++) {

chArr[i] = chs.charCodeAt(i)

}

return chArr

}

module.exports = Hex

`@/utils/SM4Util/sm4.js`

* sm4-1.0.js

/**

* @name sm4-1.0.js

* @author RuXing Liang

* @version 1.0.0 (2019-04-19)

function SM4() {

this.sbox = new Array(

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

)

this.fk = new Array(0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc)

this.ck = new Array(

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

)

}

SM4.prototype = {

expandKey: function (key) {

var k = new Array(36)

var mk = byteArrayToIntArray(key)

k[0] = mk[0] ^ this.fk[0]

k[1] = mk[1] ^ this.fk[1]

k[2] = mk[2] ^ this.fk[2]

k[3] = mk[3] ^ this.fk[3]

var rk = new Array(32)

for (var i = 0; i < 32; i++) {

k[i + 4] = k[i] ^ this.T1(k[i + 1] ^ k[i + 2] ^ k[i + 3] ^ this.ck[i])

rk[i] = k[i + 4]

}

return rk

T1: function (ta) {

var rk = 0

var b = new Array(4)

var a = intToByte(ta)

b[0] = this.sbox[a[0] & 0xff]

b[1] = this.sbox[a[1] & 0xff]

b[2] = this.sbox[a[2] & 0xff]

b[3] = this.sbox[a[3] & 0xff]

var bint = byteToInt(b, 0)

var rk = bint ^ ((bint << 13) | (bint >>> (32 - 13))) ^ ((bint << 23) | (bint >>> (32 - 23)))

return rk

one_encrypt: function (rk, data) {

var x = new Array(36)

x[0] = byteToInt(data, 0)

x[1] = byteToInt(data, 4)

x[2] = byteToInt(data, 8)

x[3] = byteToInt(data, 12)

for (var i = 0; i < 32; i++) {

x[i + 4] = x[i] ^ this.T0(x[i + 1] ^ x[i + 2] ^ x[i + 3] ^ rk[i])

}

var tmpx = new Array(4)

for (var i = 35; i >= 32; i–) {

tmpx[35 - i] = x[i]

}

var xbyte = intArrayToByteArray(tmpx)

return xbyte

T0: function (ta) {

var a = intToByte(ta)

var b = new Array(4)

b[0] = this.sbox[a[0] & 0xff]

b[1] = this.sbox[a[1] & 0xff]

b[2] = this.sbox[a[2] & 0xff]

b[3] = this.sbox[a[3] & 0xff]

var bint = byteToInt(b, 0)

var c =

bint ^

((bint << 2) | (bint >>> (32 - 2))) ^

((bint << 10) | (bint >>> (32 - 10))) ^

((bint << 18) | (bint >>> (32 - 18))) ^

((bint << 24) | (bint >>> (32 - 24)))

return c

pkcs7padding: function (input, mode) {

if (input == null) {

return null

}

var ret = null
if (mode == 1) {
  //填充
  var p = 16 - (input.length % 16)
  ret = new Array(input.length + p)
  arrayCopy(input, 0, ret, 0, input.length)
  for (var i = 0; i < p; i++) {
    ret[input.length + i] = p
  }
} //去除填充
else {
  var p = input[input.length - 1]
  ret = new Array(input.length - p)
  arrayCopy(input, 0, ret, 0, input.length - p)
}
return ret

/**

* @param key 字节数组

* @param data 字节数组

* @returns {any[]|null}

encrypt_ecb: function (key, data) {

if (key == undefined || key == null || key.length % 16 != 0) {

console.log(‘sm4 key is error!’)

return null

}

if (data == undefined || data == null || data.length <= 0) {

console.log(‘data is error!’)

return null