javascript实现des算法(支持微信小程序)

shenweihong2024-10-25 14:37

概述：

本代码是本人从c++代码上转换成的javascript代码，并测试验证通过的。考虑放其他地方要么要会员要么容易关闭，不容易被需要的获取到，故直接贴在本文档下面的章节，功能代码。

测试平台：

已经在如下环境中测试通过，其他平台(浏览器)应该也不会有问题：

1、nodejs中node.exe运行

2、微信小程序

功能代码：

javascript 复制代码 
function strDesCtxParams() {
  this.keybuf;
  this.keylen;
};

var PC_1 = [ //PC_1置换
  57, 49, 41, 33, 25, 17, 9,
  1, 58, 50, 42, 34, 26, 18,
  10, 2, 59, 51, 43, 35, 27,
  19, 11, 3, 60, 52, 44, 36,
  63, 55, 47, 39, 31, 23, 15,
  7, 62, 54, 46, 38, 30, 22,
  14, 6, 61, 53, 45, 37, 29,
  21, 13, 5, 28, 20, 12, 4
];

var Left_Move = [
  1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
];

var PC_2 = [
  14, 17, 11, 24, 1, 5,
  3, 28, 15, 6, 21, 10,
  23, 19, 12, 4, 26, 8,
  16, 7, 27, 20, 13, 2,
  41, 52, 31, 37, 47, 55,
  30, 40, 51, 45, 33, 48,
  44, 49, 39, 56, 34, 53,
  46, 42, 50, 36, 29, 32
];

var IP = [ //IP置换
  58, 50, 42, 34, 26, 18, 10, 2,
  60, 52, 44, 36, 28, 20, 12, 4,
  62, 54, 46, 38, 30, 22, 14, 6,
  64, 56, 48, 40, 32, 24, 16, 8,
  57, 49, 41, 33, 25, 17, 9, 1,
  59, 51, 43, 35, 27, 19, 11, 3,
  61, 53, 45, 37, 29, 21, 13, 5,
  63, 55, 47, 39, 31, 23, 15, 7
];

var Extern = [ //扩展置换
  32, 1, 2, 3, 4, 5,
  4, 5, 6, 7, 8, 9,
  8, 9, 10, 11, 12, 13,
  12, 13, 14, 15, 16, 17,
  16, 17, 18, 19, 20, 21,
  20, 21, 22, 23, 24, 25,
  24, 25, 26, 27, 28, 29,
  28, 29, 30, 31, 32, 1
];

var IP_1 = [ //IP逆置换
  40, 8, 48, 16, 56, 24, 64, 32,
  39, 7, 47, 15, 55, 23, 63, 31,
  38, 6, 46, 14, 54, 22, 62, 30,
  37, 5, 45, 13, 53, 21, 61, 29,
  36, 4, 44, 12, 52, 20, 60, 28,
  35, 3, 43, 11, 51, 19, 59, 27,
  34, 2, 42, 10, 50, 18, 58, 26,
  33, 1, 41, 9, 49, 17, 57, 25
];

var S_BOX = [ //S盒子
  /* S1 */
  14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
  0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
  4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
  15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13,

  /* S2 */
  15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
  3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
  0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
  13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9,

  /* S3 */
  10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
  13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
  13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
  1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12,

  /* S4 */
  7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
  13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
  10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
  3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14,

  /* S5 */
  2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
  14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
  4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
  11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3,

  /* S6 */
  12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
  10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
  9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
  4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13,

  /* S7 */
  4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
  13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
  1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
  6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12,

  /* S8 */
  13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
  1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
  7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
  2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11
];

var P = [ //P置换
  16, 7, 20, 21,
  29, 12, 28, 17,
  1, 15, 23, 26,
  5, 18, 31, 10,
  2, 8, 24, 14,
  32, 27, 3, 9,
  19, 13, 30, 6,
  22, 11, 4, 25
];


function des_init(keyArray, keyLen) {
  var i = 0;
  var desCtxParams = new strDesCtxParams();

  desCtxParams.keybuf = new Uint8Array(3 * (16 * 6));
  desCtxParams.keylen = keyLen;

  for (i = 0; i < keyLen; i += 8) {
    InputKey(keyArray, i, desCtxParams.keybuf, (16 * 6) * (i / 8));
  }

  //for (i = 0; i < 16 * 6 * 2; i++) {
  //console.log(i + " keybuf " + desCtxParams.keybuf[i]);
  //}
  return desCtxParams;
}

function des_encrypt(desCtxParams, byteArrayDataIn) {
  return des_crypt(desCtxParams, byteArrayDataIn, true);
}

function des_decrypt(desCtxParams, byteArrayDataIn) {
  return des_crypt(desCtxParams, byteArrayDataIn, false);
}


function des_str_to_array(strIn) {
  var bytesArray = new Uint8Array(strIn.length);
  var i = 0;

  for (i = 0; i < strIn.length; i++) {
    bytesArray[i] = strIn.charCodeAt(i);
  }

  return bytesArray;
}

function des_hex_to_array(hexStrIn) {
  var i = 0;
  var cnt = 0;
  var ele = 0;
  var bytesArray = null;

  cnt = 0;
  for (i = 0; i < hexStrIn.length; i++) {
    ele = hexStrIn.charCodeAt(i);
    if (ele >= 48 && ele < 48 + 10) {
      cnt++;
    }
    if (ele >= 65 && ele < 65 + 6) {
      cnt++;
    }
    if (ele >= 97 && ele < 97 + 6) {
      cnt++;
    }
  }
  bytesArray = new Uint8Array(parseInt((cnt + 1) / 2));
  cnt = 0;
  for (i = 0; i < hexStrIn.length; i++) {
    ele = hexStrIn.charCodeAt(i);
    if (ele >= 48 && ele < 48 + 10) {
      ele -= 48;
      cnt++;
    } else if (ele >= 65 && ele < 65 + 6) {
      ele = ele - 65 + 10;
      cnt++;
    } else if (ele >= 97 && ele < 97 + 6) {
      ele = ele - 97 + 10;
      cnt++;
    } else {
      continue;
    }
    if ((cnt % 2) == 1) {
      bytesArray[parseInt((cnt - 1) / 2)] = (ele << 4) & 0xF0;
    } else {
      bytesArray[parseInt((cnt - 1) / 2)] |= ele;
    }
  }

  return bytesArray;
}

function des_hex_to_str(data, len) {
  var sha256_hex_digits = "0123456789abcdef";
  var output = new String();
  var i = 0;

  for (i = 0; i < len; i++) {
    output += sha256_hex_digits.charAt((data[i] >>> 4) & 0x0f);
    output += sha256_hex_digits.charAt((data[i]) & 0x0f);
  }

  return output;
}

function Substitution(subIn, subLen, lpIn, lpInIndex, lpOut, lpOutIndex) {
  //置换
  var i = 0;

  for (i = 0; i < subLen; i++) {
    //console.log(i + " subIn = " + subIn[i]);
    if ((i % 8) == 0) {
      lpOut[parseInt(i / 8) + lpOutIndex] = 0x00;
    }
    /*if (i == 16) {
    	console.log("lpInIndex:" + lpInIndex);
    	console.log("subIn[i]:" + subIn[i]);
    	console.log("parseInt((subIn[i] - 1) / 8) + lpInIndex :" + (((subIn[i] - 1) / 8) + lpInIndex));
    	console.log("lpIn[parseInt((subIn[i] - 1) / 8) + lpInIndex] " + lpIn[parseInt((subIn[i] - 1) / 8) + lpInIndex]);
    	return;
    }*/
    if ((lpIn[parseInt((subIn[i] - 1) / 8) + lpInIndex] & (0x80 >>> ((subIn[i] - 1) % 8))) != 0) {
      lpOut[parseInt(i / 8) + lpOutIndex] |= (0x80 >>> (i % 8));
      //console.log("in " + i);
    }
    //console.log(i + " lpOut :" + lpOut[parseInt(i / 8) + lpOutIndex]);
  }
}

function LeftMove(buf, move) {
  var tmp;

  tmp = buf[0];
  buf[0] <<= move;
  buf[0] |= (buf[1] >> (8 - move));

  buf[1] <<= move;
  buf[1] |= (buf[2] >> (8 - move));

  buf[2] <<= move;
  buf[2] |= (buf[3] >> (8 - move));

  buf[3] &= 0xF0;
  buf[3] <<= move;
  buf[3] |= (tmp >> (8 - 4 - move));
}


function des_crypt(desCtxParams, byteArrayDataIn, isEncrypt) {
  var outResult = new Uint8Array(8);
  var tmpBuf = null;

  if (desCtxParams.keylen == 8) {
    DesCode(byteArrayDataIn, 0, outResult, 0, isEncrypt, desCtxParams.keybuf, 0);
  }
  if (desCtxParams.keylen == 16) {
    tmpBuf = new Uint8Array(16);
    DesCode(byteArrayDataIn, 0, tmpBuf, 0, isEncrypt, desCtxParams.keybuf, 0);
    DesCode(tmpBuf, 0, tmpBuf, 8, !isEncrypt, desCtxParams.keybuf, 16 * 6);
    DesCode(tmpBuf, 8, outResult, 0, isEncrypt, desCtxParams.keybuf, 0);
  }
  if (desCtxParams.keylen == 24) {
    tmpBuf = new Uint8Array(16);
    DesCode(byteArrayDataIn, 0, tmpBuf, 0, isEncrypt, desCtxParams.keybuf, isEncrypt ? 0 : (16 * 6 * 2));
    DesCode(tmpBuf, 0, tmpBuf, 8, !isEncrypt, desCtxParams.keybuf, 16 * 6);
    DesCode(tmpBuf, 8, outResult, 0, isEncrypt, desCtxParams.keybuf, isEncrypt ? (16 * 6 * 2) : 0);
  }

  return outResult;
}

function InputKey(keyIn, keyInOff, keyOutBuf, keyOutBufLen) {
  var tmpkey = new Uint8Array(32);
  var C = new Uint8Array(4);
  var D = new Uint8Array(4);
  var turns = 0;
  var i = 0;

  //console.log("keyInOff:" + keyInOff);
  Substitution(PC_1, 56, keyIn, keyInOff, tmpkey, 0);
  //console.log(des_hex(tmpkey, 32));

  for (turns = 0; turns < 16; turns++) {
    //memcpy(C, tmpkey, 4);
    //memcpy(D, &tmpkey[3], 4);
    for (i = 0; i < 4; i++) {
      C[i] = tmpkey[i];
      D[i] = tmpkey[i + 3];
    }

    D[0] <<= 4;
    D[0] &= 0xF0;
    D[0] |= ((D[1] >> 4) & 0x0F);

    D[1] <<= 4;
    D[1] &= 0xF0;
    D[1] |= ((D[2] >> 4) & 0x0F);

    D[2] <<= 4;
    D[2] &= 0xF0;
    D[2] |= ((D[3] >> 4) & 0x0F);

    D[3] <<= 4;
    D[3] &= 0xF0;

    LeftMove(C, Left_Move[turns]);
    LeftMove(D, Left_Move[turns]);

    //memcpy(tmpkey, C, 4);
    for (i = 0; i < 4; i++) {
      tmpkey[i] = C[i];
    }

    tmpkey[3] &= 0xF0;
    tmpkey[3] |= ((D[0] >> 4) & 0x0F);

    tmpkey[4] = (D[0] << 4) & 0xF0;
    tmpkey[4] |= ((D[1] >> 4) & 0x0F);

    tmpkey[5] = (D[1] << 4) & 0xF0;
    tmpkey[5] |= ((D[2] >> 4) & 0x0F);

    tmpkey[6] = (D[2] << 4) & 0xF0;
    tmpkey[6] |= ((D[3] >> 4) & 0x0F);

    //Substitution((unsigned char*)PC_2, 48, tmpkey, (unsigned char*)gTmpKey[turns]);
    Substitution(PC_2, 48,
      tmpkey, 0, keyOutBuf, keyOutBufLen + turns * 6);
  }

  //for (i = 0; i < 16 * 6; i++) {
  //console.log(i + " keybuf = %d",keyOutBuf[keyOutBufLen + i]);
  //}
}


function DesCode(lpIn, lpInIndex, lpOut, lpOutIndex,
  isEncrypt /*true:加密；false：解密*/ , keybuf, keybufIndex) {
  //unsigned char tmp[64];
  var tmp = new Uint8Array(64);
  //char L[4];
  var L = new Uint8Array(4);
  //char R[4];
  var R = new Uint8Array(4);
  //char KeepR[4];
  var KeepR = new Uint8Array(4);
  var i = 0;
  var j = 0;

  var turns = 0;
  var tmpchar = 0;

  Substitution(IP, 64, lpIn, lpInIndex, tmp, 0); /*IP置换*/

  //console.log(des_hex(tmp, 64));
  //memcpy(L, tmp, 4);
  //memcpy(R, &tmp[4], 4);
  for (i = 0; i < 4; i++) {
    L[i] = tmp[i];
    R[i] = tmp[i + 4];
  }

  if (isEncrypt) {
    turns = 0;
  } else {
    turns = 15;
  }

  while (true) {
    if (isEncrypt) {
      if (turns >= 16) {
        break;
      }
    } else {
      if (turns < 0) {
        break;
      }
    }
    //memcpy(KeepR, R, sizeof(R));
    for (i = 0; i < 4; i++) {
      KeepR[i] = R[i];
    }
    Substitution(Extern, 48, R, 0, tmp, 0);
    //console.log(des_hex(tmp, 64));
    //return;

    for (i = 0; i < 6; i++) {
      //tmp[i] = tmp[i] ^ gTmpKey[turns][i];
      tmp[i] = tmp[i] ^ keybuf[turns * 6 + i + keybufIndex];
    }
    //console.log(des_hex(tmp, 64));
    //return;


    /*S盒子计算*/
    for (i = 0; i < 8; i++) {
      /*8bit*6字节 转换成6bit*8字节*/
      tmpchar = tmp[parseInt(i * 6 / 8)];
      //console.log(parseInt(i * 6 / 8));
      //console.log("1:" + tmpchar);
      j = (i * 6) % 8;
      if (j > 2) {
        //两个字节
        tmpchar <<= (j - 2);
        tmpchar |= (tmp[parseInt(i * 6 / 8) + 1] >>> (10 - j));
        tmpchar &= 0x3F;
      } else {
        tmpchar >>>= (2 - j);
        tmpchar &= 0x3F;
      }
      //console.log("2:" + tmpchar);
      tmpchar |= ((tmpchar & 0x20) << 1);
      tmpchar &= (~0x20);
      tmpchar |= ((tmpchar & 0x01) << 5);
      tmpchar = (tmpchar >> 1) & 0x3F;
      //console.log("3:" + tmpchar);
      tmpchar = S_BOX[i * 64 + tmpchar];
      tmpchar &= 0x0F;
      //console.log("30:" + tmpchar);
      tmpchar = (tmpchar << (((i + 1) % 2) * 4));
      //console.log("4:" + tmpchar);
      tmp[parseInt(i / 2)] &= (0x0F << (((i) % 2) * 4));
      tmp[parseInt(i / 2)] |= tmpchar;
      //console.log(i + " tmp:" + tmp[parseInt(i / 2)]);
      //return;
    }
    //console.log(des_hex(tmp, 64));
    //return;
    Substitution(P, 32, tmp, 0, R, 0);

    for (j = 0; j < 4; j++) {
      R[j] ^= L[j]; /*异或运算*/
      L[j] = KeepR[j]; /*交换左右明文*/
    }

    /*合到一起*/
    //memcpy(tmp, L, sizeof(L));
    //memcpy(tmp + 4, R, sizeof(R));
    for (i = 0; i < 4; i++) {
      tmp[i] = L[i];
      tmp[i + 4] = R[i];
    }

    if (isEncrypt) {
      turns++;
    } else {
      turns--;
    }
  }

  for (i = 0; i < 4; i++) {
    tmpchar = tmp[4 + i];
    tmp[4 + i] = tmp[i];
    tmp[i] = tmpchar;
  }

  /*IP的逆置换*/
  Substitution(IP_1, 64, tmp, 0, lpOut, lpOutIndex);
}


module.exports = {
  des_init: des_init,
  des_encrypt: des_encrypt,
  des_decrypt: des_decrypt,
  des_str_to_array: des_str_to_array,
  des_hex_to_array: des_hex_to_array,
  des_hex_to_str: des_hex_to_str
}

测试代码：

如下在微信小程序中测试验证

javascript 复制代码 
var js_des = require('../../crypto/des.js');

testDes() {
  var desCtx = null;
  var result = null;

  desCtx = js_des.des_init(js_des.des_hex_to_array("0011223344556677"), 8);
  result = js_des.des_encrypt(desCtx, js_des.des_hex_to_array("1234567890ABCDEF"));
  console.log("8B key des encrypt:" + js_des.des_hex_to_str(result, 8));

  desCtx = js_des.des_init(js_des.des_hex_to_array("00112233445566778888888800000000"), 16);
  result = js_des.des_encrypt(desCtx, js_des.des_hex_to_array("1234567890ABCDEF"));
  console.log("16B key des encrypt:" + js_des.des_hex_to_str(result, 8));

  desCtx = js_des.des_init(js_des.des_hex_to_array("0011223344556677888888880000000088776655AABBCCDD"), 24);
  result = js_des.des_encrypt(desCtx, js_des.des_hex_to_array("1234567890ABCDEF"));
  console.log("24B key des encrypt:" + js_des.des_hex_to_str(result, 8));

  desCtx = js_des.des_init(js_des.des_hex_to_array("0011223344556677"), 8);
  result = js_des.des_decrypt(desCtx, js_des.des_hex_to_array("1234567890ABCDEF"));
  console.log("8B key des decrypt:" + js_des.des_hex_to_str(result, 8));

  desCtx = js_des.des_init(js_des.des_hex_to_array("00112233445566778888888800000000"), 16);
  result = js_des.des_decrypt(desCtx, js_des.des_hex_to_array("1234567890ABCDEF"));
  console.log("16B key des decrypt:" + js_des.des_hex_to_str(result, 8));

  desCtx = js_des.des_init(js_des.des_hex_to_array("0011223344556677888888880000000088776655AABBCCDD"), 24);
  result = js_des.des_decrypt(desCtx, js_des.des_hex_to_array("1234567890ABCDEF"));
  console.log("24B key des decrypt:" + js_des.des_hex_to_str(result, 8));
},

测试结果：

8B key des encrypt:dabbb1cc478bffcc

16B key des encrypt:7bf2b53fc58f4069

24B key des encrypt:b2c9dae93ca6eb4b

79 8B key des decrypt:52832babfbd22b03

83 16B key des decrypt:3ad46435585e6d07

87 24B key des decrypt:8ebbe81aee99048c

经其他工具验证，结果是正确的

相关推荐
掘金安东尼18 小时前
让 JavaScript 更容易「善后」的新能力
前端·javascript·面试
掘金安东尼18 小时前
用 HTMX 为 React Data Grid 加速实时更新
前端·javascript·面试
灵感__idea20 小时前
Hello 算法：众里寻她千“百度”
前端·javascript·算法
袋鼠云数栈UED团队21 小时前
基于 Lexical 实现变量输入编辑器
前端·javascript·架构
亦妤1 天前
JS执行机制、作用域及作用域链
javascript
SuperEugene1 天前
表单最佳实践：从 v-model 到自定义表单组件（含校验）
前端·javascript·vue.js
不会敲代码11 天前
React性能优化：深入理解useMemo和useCallback
前端·javascript·react.js
YukiMori231 天前
一个有趣的原型继承实验：为什么“男人也会生孩子”？从对象赋值到构造函数继承的完整推演
前端·javascript
摸鱼的春哥1 天前
惊！黑客靠AI把墨西哥政府打穿了，海量数据被黑
前端·javascript·后端
小兵张健1 天前
Playwright MCP 截图标注方案调研（推荐方案1）
前端·javascript·github
热门推荐
01GitHub 镜像站点02【OpenClaw 本地实战 Ep.3】突破瓶颈：强制修改 openclaw.json 解锁 32k 上下文记忆03OpenClaw 使用和管理 MCP 完全指南04OpenClaw + 飞书（Feishu）环境搭建指南05Claude Code + GLM4.7 避坑指南：解决 Unable to connect to Anthropic services06OpenClaw优化飞书API 额度已耗尽问题07Clawdbot部署教程：解决‘gateway token missing’授权问题的完整步骤08Window 10部署openclaw报错node.exe : npm error code 12809OpenClaw大龙虾机器人完整安装教程10OpenClaw 接入阿里云百炼 Coding Plan 指南