微信小程序中如何使用MD5加密？
作者：Miao 阅读：10349次
在utils文件夹里放入md5.js（md5.js放在本文尾部），方便调用；
在需要使用的页面或组件中require引入外部文件；
const md5 = require("../../utils/md5.js");另外md5.js末尾里需要使用exports输出方法，这里默认输出了3个，如需其它(hex_md5，b64_md5，str_md5，hex_hmac_md5，b64_hmac_md5，str_hmac_md5)加密请自行添加输出；
module.exports = {
hexMD5: hex_md5,
b64Md5: b64_md5,
strMd5: str_md5
}方法调用：
md5.hexMD5("加密内容");
md5.b64Md5("加密内容");
md5.strMd5("加密内容");md5.js
/*
* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
* Digest Algorithm, as defined in RFC 1321.
* Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
* Distributed under the BSD License
* See http://pajhome.org.uk/crypt/md5 for more info.
*/
/*
* Configurable variables. You may need to tweak these to be compatible with
* the server-side, but the defaults work in most cases.
*/
var hexcase =
0;
/* hex output format. 0 - lowercase; 1 - uppercase */
var b64pad =
"";
/* base-64 pad character. "=" for strict RFC compliance */
var chrsz =
8;
/* bits per input character. 8 - ASCII; 16 - Unicode */
/*
* These are the functions you'll usually want to call
* They take string arguments and return either hex or base-64 encoded strings
*/
function hex_md5(s) {
return binl2hex(core_md5(str2binl(s), s.length * chrsz));
}
function b64_md5(s) {
return binl2b64(core_md5(str2binl(s), s.length * chrsz));
}
function str_md5(s) {
return binl2str(core_md5(str2binl(s), s.length * chrsz));
}
function hex_hmac_md5(key, data) {
return binl2hex(core_hmac_md5(key, data));
}
function b64_hmac_md5(key, data) {
return binl2b64(core_hmac_md5(key, data));
}
function str_hmac_md5(key, data) {
return binl2str(core_hmac_md5(key, data));
}
/*
* Perform a simple self-test to see if the VM is working
*/
function md5_vm_test() {
return hex_md5(
"abc") ==
"900150983cd24fb0d6963f7d28e17f72";
}
/*
* Calculate the MD5 of an array of little-endian words, and a bit length
*/
function core_md5(x, len) {
/* append padding */
x[len >>
5] |=
0x80 << ((len) %
32);
x[(((len +
64) >>>
9) <<
4) +
14] = len;
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 = md5_ff(a, b, c, d, x[i +
0],
7, -
680876936);
d = md5_ff(d, a, b, c, x[i +
1],
12, -
389564586);
c = md5_ff(c, d, a, b, x[i +
2],
17,
606105819);
b = md5_ff(b, c, d, a, x[i +
3],
22, -
1044525330);
a = md5_ff(a, b, c, d, x[i +
4],
7, -
176418897);
d = md5_ff(d, a, b, c, x[i +
5],
12,
1200080426);
c = md5_ff(c, d, a, b, x[i +
6],
17, -
1473231341);
b = md5_ff(b, c, d, a, x[i +
7],
22, -
45705983);
a = md5_ff(a, b, c, d, x[i +
8],
7,
1770035416);
d = md5_ff(d, a, b, c, x[i +
9],
12, -
1958414417);
c = md5_ff(c, d, a, b, x[i +
10],
17, -
42063);
b = md5_ff(b, c, d, a, x[i +
11],
22, -
1990404162);
a = md5_ff(a, b, c, d, x[i +
12],
7,
1804603682);
d = md5_ff(d, a, b, c, x[i +
13],
12, -
40341101);
c = md5_ff(c, d, a, b, x[i +
14],
17, -
1502002290);
b = md5_ff(b, c, d, a, x[i +
15],
22,
1236535329);
a = md5_gg(a, b, c, d, x[i +
1],
5, -
165796510);
d = md5_gg(d, a, b, c, x[i +
6],
9, -
1069501632);
c = md5_gg(c, d, a, b, x[i +
11],
14,
643717713);
b = md5_gg(b, c, d, a, x[i +
0],
20, -
373897302);
a = md5_gg(a, b, c, d, x[i +
5],
5, -
701558691);
d = md5_gg(d, a, b, c, x[i +
10],
9,
38016083);
c = md5_gg(c, d, a, b, x[i +
15],
14, -
660478335);
b = md5_gg(b, c, d, a, x[i +
4],
20, -
405537848);
a = md5_gg(a, b, c, d, x[i +
9],
5,
568446438);
d = md5_gg(d, a, b, c, x[i +
14],
9, -
1019803690);
c = md5_gg(c, d, a, b, x[i +
3],
14, -
187363961);
b = md5_gg(b, c, d, a, x[i +
8],
20,
1163531501);
a = md5_gg(a, b, c, d, x[i +
13],
5, -
1444681467);
d = md5_gg(d, a, b, c, x[i +
2],
9, -
51403784);
c = md5_gg(c, d, a, b, x[i +
7],
14,
1735328473);
b = md5_gg(b, c, d, a, x[i +
12],
20, -
1926607734);
a = md5_hh(a, b, c, d, x[i +
5],
4, -
378558);
d = md5_hh(d, a, b, c, x[i +
8],
11, -
2022574463);
c = md5_hh(c, d, a, b, x[i +
11],
16,
1839030562);
b = md5_hh(b, c, d, a, x[i +
14],
23, -
35309556);
a = md5_hh(a, b, c, d, x[i +
1],
4, -
1530992060);
d = md5_hh(d, a, b, c, x[i +
4],
11,
1272893353);
c = md5_hh(c, d, a, b, x[i +
7],
16, -
155497632);
b = md5_hh(b, c, d, a, x[i +
10],
23, -
1094730640);
a = md5_hh(a, b, c, d, x[i +
13],
4,
681279174);
d = md5_hh(d, a, b, c, x[i +
0],
11, -
358537222);
c = md5_hh(c, d, a, b, x[i +
3],
16, -
722521979);
b = md5_hh(b, c, d, a, x[i +
6],
23,
76029189);
a = md5_hh(a, b, c, d, x[i +
9],
4, -
640364487);
d = md5_hh(d, a, b, c, x[i +
12],
11, -
421815835);
c = md5_hh(c, d, a, b, x[i +
15],
16,
530742520);
b = md5_hh(b, c, d, a, x[i +
2],
23, -
995338651);
a = md5_ii(a, b, c, d, x[i +
0],
6, -
198630844);
d = md5_ii(d, a, b, c, x[i +
7],
10,
1126891415);
c = md5_ii(c, d, a, b, x[i +
14],
15, -
1416354905);
b = md5_ii(b, c, d, a, x[i +
5],
21, -
57434055);
a = md5_ii(a, b, c, d, x[i +
12],
6,
1700485571);
d = md5_ii(d, a, b, c, x[i +
3],
10, -
1894986606);
c = md5_ii(c, d, a, b, x[i +
10],
15, -
1051523);
b = md5_ii(b, c, d, a, x[i +
1],
21, -
2054922799);
a = md5_ii(a, b, c, d, x[i +
8],
6,
1873313359);
d = md5_ii(d, a, b, c, x[i +
15],
10, -
30611744);
c = md5_ii(c, d, a, b, x[i +
6],
15, -
1560198380);
b = md5_ii(b, c, d, a, x[i +
13],
21,
1309151649);
a = md5_ii(a, b, c, d, x[i +
4],
6, -
145523070);
d = md5_ii(d, a, b, c, x[i +
11],
10, -
1120210379);
c = md5_ii(c, d, a, b, x[i +
2],
15,
718787259);
b = md5_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 Array(a, b, c, d);
}
/*
* These functions implement the four basic operations the algorithm uses.
*/
function md5_cmn(q, a, b, x, s, t) {
return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
}
function md5_ff(a, b, c, d, x, s, t) {
return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t) {
return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t) {
return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t) {
return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}
/*
* Calculate the HMAC-MD5, of a key and some data
*/
function core_hmac_md5(key, data) {
var bkey = str2binl(key);
if (bkey.length >
16) bkey = core_md5(bkey, key.length * chrsz);
var ipad = Array(
16),
opad = Array(
16);
for (
var i =
0; i <
16; i++) {
ipad[i] = bkey[i] ^
0x36363636;
opad[i] = bkey[i] ^
0x5C5C5C5C;
}
var hash = core_md5(ipad.concat(str2binl(data)),
512 + data.length * chrsz);
return core_md5(opad.concat(hash),
512 +
128);
}
/*
* 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 bit_rol(num, cnt) {
return (num << cnt) | (num >>> (
32 - cnt));
}
/*
* Convert a string to an array of little-endian words
* If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
*/
function str2binl(str) {
var bin = Array();
var mask = (
1 << chrsz) -
1;
for (
var i =
0; i < str.length * chrsz; i += chrsz)
bin[i >>
5] |= (str.charCodeAt(i / chrsz) & mask) << (i %
32);
return bin;
}
/*
* Convert an array of little-endian words to a string
*/
function binl2str(bin) {
var str =
"";
var mask = (
1 << chrsz) -
1;
for (
var i =
0; i < bin.length *
32; i += chrsz)
str += String.fromCharCode((bin[i >>
5] >>> (i %
32)) & mask);
return str;
}
/*
* Convert an array of little-endian words to a hex string.
*/
function binl2hex(binarray) {
var hex_tab = hexcase ?
"0123456789ABCDEF" :
"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 base-64 string
*/
function binl2b64(binarray) {
var tab =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var str =
"";
for (
var i =
0; i < binarray.length *
4; i +=
3) {
var triplet = (((binarray[i >>
2] >>
8 * (i %
4)) &
0xFF) <<
16) |
(((binarray[i +
1 >>
2] >>
8 * ((i +
1) %
4)) &
0xFF) <<
8) |
((binarray[i +
2 >>
2] >>
8 * ((i +
2) %
4)) &
0xFF);
for (
var j =
0; j <
4; j++) {
if (i *
8 + j *
6 > binarray.length *
32) str += b64pad;
else str += tab.charAt((triplet >>
6 * (
3 - j)) &
0x3F);
}
}
return str;
}
module.exports = {
hexMD5: hex_md5,
b64Md5: b64_md5,
strMd5: str_md5
}
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