前端SM4加密解密

前后端加密一致，如果不一致就是key有问题

调用方法：

sm4('解密内容', '密钥', '0:解密，1：加密')

sm4.js文件

/* eslint-disable no-bitwise, no-mixed-operators, complexity */const DECRYPT = 0const CBC = 0const ROUND = 32const BLOCK = 16const Sbox = [  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]const 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]/** * 16 进制串转字节数组 */function hexToArray(str) {  const arr = []  for (let i = 0, len = str.length; i  {    item = item.toString(16)    return item.length === 1 ? '0' + item : item  }).join('')}/** * utf8 串转字节数组 */function utf8ToArray(str) {  const arr = []  for (let i = 0, len = str.length; i  6)) // 110yyyyy（0xc0-0xdf）      arr.push(0x80 | (point & 0x3f)) // 10zzzzzz（0x80-0xbf）    } else if (point = 0xE000 && point       // 三字节：标量值：00000000 xxxxyyyy yyzzzzzz      arr.push(0xe0 | (point >> 12)) // 1110xxxx（0xe0-0xef）      arr.push(0x80 | ((point >>> 6) & 0x3f)) // 10yyyyyy（0x80-0xbf）      arr.push(0x80 | (point & 0x3f)) // 10zzzzzz（0x80-0xbf）    } else if (point >= 0x010000 && point       // 四字节：标量值：000wwwxx xxxxyyyy yyzzzzzz      i++      arr.push((0xf0 | (point >> 18) & 0x1c)) // 11110www（0xf0-0xf7）      arr.push((0x80 | ((point >>> 12) & 0x3f))) // 10xxxxxx（0x80-0xbf）      arr.push((0x80 | ((point >>> 6) & 0x3f))) // 10yyyyyy（0x80-0xbf）      arr.push((0x80 | (point & 0x3f))) // 10zzzzzz（0x80-0xbf）    } else {      // 五、六字节，暂时不支持      arr.push(point)      throw new Error('input is not supported')    }  }  return arr}/** * 字节数组转 utf8 串 */function arrayToUtf8(arr) {  const str = []  for (let i = 0, len = arr.length; i = 0xf0 && arr[i]       // 四字节      str.push(String.fromCodePoint(((arr[i] & 0x07)       // 三字节      str.push(String.fromCodePoint(((arr[i] & 0x0f)       // 双字节      str.push(String.fromCodePoint(((arr[i] & 0x1f)       // 单字节      str.push(String.fromCodePoint(arr[i]))    }  }  return str.join('')}/** * 32 比特循环左移 */function rotl(x, y) {  return x   return (Sbox[a  24 & 0xFF] & 0xFF)  16 & 0xFF] & 0xFF) >> 8 & 0xFF] & 0xFF)   return b ^ rotl(b, 2) ^ rotl(b, 10) ^ rotl(b, 18) ^ rotl(b, 24)}/** * 线性变换，生成轮密钥用 */function l2(b) {  return b ^ rotl(b, 13) ^ rotl(b, 23)}/** * 以一组 128 比特进行加密/解密操作 */function sms4Crypt(input, output, roundKey) {  const x = new Array(4)  // 字节数组转成字数组（此处 1 字 = 32 比特）  const tmp = new Array(4)  for (let i = 0; i > 16 & 0xff    output[j + 2] = x[3 - j / 4] >>> 8 & 0xff    output[j + 3] = x[3 - j / 4] & 0xff  }}/** * 密钥扩展算法 */function sms4KeyExt(key, roundKey, cryptFlag) {  const x = new Array(4)  // 字节数组转成字数组（此处 1 字 = 32 比特）  const tmp = new Array(4)  for (let i = 0; i