微信小程序 MD5的方法详解及实例代码

微信小程序 MD5的方法详解及实例代码

微信小程序 MD5的方法详解

生成的文件可以放在  utils文件中哦！！！

/*

* A javascript implementation of the RSA Data Security, Inc. MD5 Message

* Digest Algorithm, as defined in RFC 1321.

* Version 1.1 Copyright (C) Paul Johnston 1999 - 2002.

* Code also contributed by Greg Holt

* See http://pajhome.org.uk/site/legal.html for details.

eoJbBuNbIc */

/*

* Add integers, wrapping at 2^32. This uses 16-bit operations internally

* to work around bugs in some js interpreters.

*/

function safe_add(x, y)

{

var lsw = (x & 0xFFFF) + (y & 0xFFFF)

var msw = (x >> 16) + (y >> 16) + (lsw >> 16)

return (msw << 16) | (lsw & 0xFFFF)

}

/*

* Bitwise rotate a 32-bit number to the left.

*/

function rol(num, cnt)

{

return (num << cnt) | (num >>> (32 - cnt))

}

/*

* These functions implement the four basic operations the algorithm uses.

*/

function cmn(q, a, b, x, s, t)

{

reteoJbBuNbIcurn safe_add(rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b)

}

function ff(a, b, c, d, x, s, t)

{

return cmn((b & c) | ((~b) & d), a, b, x, s, t)

}

function gg(a, b, c, d, x, s, t)

{

return cmn((b & d) | (c & (~d)), a, b, x, s, t)

}

function hh(a, b, c, d, x, s, t)

{

return cmn(b ^ c ^ d, a, b, x, s, t)

}

function ii(a, b, c, d, x, s, t)

{

return cmn(c ^ (b | (~d)), a, b, x, s, t)

}

/*

* Calculate the MD5 of an array of little-endian words, producing an array

* of little-endian words.

*/

function coreMD5(x)

{

var a = 1732584193

var b = -271733879

var c = -1732584194

var d = 271733878

for(var i = 0; i < x.length; i += 16)

{

var olda = a

var oldb = b

var oldc = c

var oldd = d

a = ff(a, b, c, d, x[i+ 0], 7 , -680876936)

d = ff(d, a, b, c, x[i+ 1], 12, -389564586)

c = ff(c, d, a, b, x[i+ 2], 17, 606105819)

b = ff(b, c, d, a, x[i+ 3], 22, -1044525330)

a = ff(a, b, c, d, x[i+ 4], 7 , -176418897)

d = ff(d, a, b, c, x[i+ 5], 12, 1200080426)

c = ff(c, d, a, b, x[i+ 6], 17, -1473231341)

b = ff(b, c, d, a, x[i+ 7], 22, -45705983)

a = ff(a, b, c, d, x[i+ 8], 7 , 1770035416)

d = ff(d, a, b, c, x[i+ 9], 12, -1958414417)

c = ff(c, d, a, b, x[i+10], 17, -42063)

b = ff(b, c, d, a, x[i+11], 22, -1990404162)

a = ff(a, b, c, d, x[i+12], 7 , 1804603682)

d = ff(d, a, b, c, x[i+13], 12, -40341101)

c = ff(c, d, a, b, x[i+14], 17, -1502002290)

b = ff(b, c, d, a, x[i+15], 22, 1236535329)

a = gg(a, b, c, d, x[i+ 1], 5 , -165796510)

d = gg(d, a, b, c, x[i+ 6], 9 , -1069501632)

c = gg(c, d, a, b, x[i+11], 14, 643717713)

b = gg(b, c, d, a, x[i+ 0], 20, -373897302)

a = gg(a, b, c, d, x[i+ 5], 5 , -701558691)

d = gg(d, a, b, c, x[i+10], 9 , 38016083)

c = gg(c, d, a, b, x[i+15], 14, -660478335)

b = gg(b, c, d, a, x[i+ 4], 20, -405537848)

a = gg(a, b, c, d, x[i+ 9], 5 , 568446438)

d = gg(d, a, b, c, x[i+14], 9 , -1019803690)

c = gg(c, d, a, b, x[i+ 3], 14, -187363961)

b = gg(b, c, d, a, x[i+ 8], 20, 1163531501)

a = gg(a, b, c, d, x[i+13], 5 , -1444681467)

d = gg(d, a, b, c, x[i+ 2], 9 , -51403784)

c = gg(c, d, a, b, x[i+ 7], 14, 1735328473)

b = gg(b, c, d, a, x[i+12], 20, -1926607734)

a = hh(a, b, c, d, x[i+ 5], 4 , -378558)

d = hh(d, a, b, c, x[i+ 8], 11, -2022574463)

c = hh(c, d, a, b, x[i+11], 16, 1839030562)

b = hh(b, c, d, a, x[i+14], 23, -35309556)

a = hh(a, b, c, d, x[i+ 1], 4 , -1530992060)

d = hh(d, a, b, c, x[i+ 4], 11, 1272893353)

c = hh(c, d, a, b, x[i+ 7], 16, -155497632)

b = hh(b, c, d, a, x[i+10], 23, -1094730640)

a = hh(a, b, c, d, x[i+13], 4 , 681279174)

d = hh(d, a, b, c, x[i+ 0], 11, -358537222)

c = hh(c, d, a, b, x[i+ 3], 16, -722521979)

b = hh(b, c, d, a, x[i+ 6], 23, 76029189)

a = hh(a, b, c, d, x[i+ 9], 4 , -640364487)

d = hh(d, a, b, c, x[i+12], 11, -421815835)

c = hh(c, d, a, b, x[i+15], 16, 530742520)

b = hh(b, c, d, a, x[i+ 2], 23, -995338651)

a = ii(a, b, c, d, x[i+ 0], 6 , -198630844)

d = ii(d, a, b, c, x[i+ 7], 10, 1126891415)

c = ii(c, d, a, b, x[i+14], 15, -1416354905)

b = ii(b, c, d, a, x[i+ 5], 21, -57434055)

a = ii(a, b, c, d, x[i+12], 6 , 1700485571)

d = ii(d, a, b, c, x[i+ 3], 10, -1894986606)

c = ii(c, d, a, b, x[i+10], 15, -1051523)

b = ii(b, c, d, a, x[i+ 1], 21, -2054922799)

a = ii(a, b, c, d, x[i+ 8], 6 , 1873313359)

d = ii(d, a, b, c, x[i+15], 10, -30611744)

c = ii(c, d, a, b, x[i+ 6], 15, -1560198380)

b = ii(b, c, d, a, x[i+13], 21, 1309151649)

a = ii(a, b, c, d, x[i+ 4], 6 , -145523070)

d = ii(d, a, b, c, x[i+11], 10, -1120210379)

c = ii(c, d, a, b, x[i+ 2], 15, 718787259)

b = ii(b, c, d, a, x[i+ 9], 21, -343485551)

a = safe_add(a, olda)

b = safe_add(b, oldb)

c = safe_add(c, oldc)

d = safe_add(d, oldd)

}

return [a, b, c, d]

}

/*

* Convert an array of little-endian words to a hex string.

*/

function binl2hex(binarray)

{

var hex_tab = "0123456789abcdef"

var str = ""

for(var i = 0; i < binarray.length * 4; i++)

{

str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +

hex_tab.charAt((binarray[i>>2] >> ((i%4)*8)) & 0xF)

}

return str

}

/*

* Convert an array of little-endian words to a base64 encoded string.

*/

function binl2b64(binarray)

{

var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"

var str = ""

for(var i = 0; i < binarray.length * 32; i += 6)

{

str += tab.charAt(((binarray[i>>5] << (i%32)) & 0x3F) |

((binarray[i>>5+1] >> (32-i%32)) & 0x3F))

}

return str

}

/*

* Convert an 8-bit character string to a sequence of 16-word blocks, storehttp://d

* as an array, and append appropriate padding for MD4/5 calculation.

* If any of the characters are >255, the high byte is silently ignored.

*/

function str2binl(str)

{

var nblk = ((str.length + 8) >> 6) + 1 // number of 16-word blocks

var blks = new Array(nblk * 16)

for(var i = 0; i < nblk * 16; i++) blks[i] = 0

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

blks[i>>2] |= (str.charCodeAt(i) & 0xFF) << ((i%4) * 8)

blks[i>>2] |= 0x80 << ((i%4) * 8)

blks[nblk*16-2] = str.length * 8

return blks

}

/*

* Convert a wide-character string to a sequence of 16-word blocks, stored as

* an array, and append appropriate padding for MD4/5 calculation.

*/

function strw2binl(str)

{

var nblk = ((str.length + 4) >> 5) + 1 // number of 16-word blocks

var blks = new Array(nblk * 16)

for(var i = 0; i < nblk * 16; i++) blks[i] = 0

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

blks[i>>1] |= str.charCodeAt(i) << ((i%2) * 16)

blks[i>>1] |= 0x80 << ((i%2) * 16)

blks[nblk*16-2] = str.length * 16

return blks

}

/*

* External interface

*/

function hexMD5 (str) { return binl2hex(coreMD5( str2binl(str))) }

function hexMD5w(str) { return binl2hex(coreMD5(strw2binl(str))) }

function b64MD5 (str) { return binl2b64(coreMD5( str2binl(str))) }

function b64MD5w(str) { return binl2b64(coreMD5(strw2binl(str))) }

/* Backward compatibility */

function calcMD5(str) { return binl2hex(coreMD5( str2binl(str))) }

module.exports = {

hexMD5: hexMD5

}

使用方式 ：

var utilMd5 = require('../../utils/md5.js');

var password = utilMd5.hexMD5(password);

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