获取随机数/js获取随机数/javascript获取随机数
Math.random(); // 0-1，既不包括0，也不包括1
Math.random()*290; // 0-290，既不包括0，也不包括290
Math.round(Math.random()*290); // 四舍五入0-290，既包括0，也包括290
Math.round(Math.random()*29)*10; // 0-290，既包括0，也包括290，且获取到的都是整10的数
md5加密字符串/密码加密/字符串加密
md5.js
// 本文件用于字符串加密，比如加密密码。
// 使用方法：
// import {hex_md5,b64_md5,hex_hmac_md5,b64_hmac_md5,calcMD5}
// console.log(hex_md5('abc123'))
// console.log(b64_md5('abc123'))
// console.log(hex_hmac_md5('abc123'))
// console.log(b64_hmac_md5('abc123'))
// console.log(calcMD5('abc123'))
// `node ./md5.js`即可执行本文件
// console.log(hex_md5('123')) // 202cb962ac59075b964b07152d234b70
// console.log(b64_md5('123')) // ICy5YqxZB1uWSwcVLSNLcA
// console.log(hex_hmac_md5('abc', '123')) // 725658455c63977e1b73a199970a9972
// console.log(b64_hmac_md5('abc', '123')) // clZYRVxjl34bc6GZlwqZcg
// console.log(calcMD5('123')) // 202cb962ac59075b964b07152d234b70
//
// console.log(hex_md5('123456')) // e10adc3949ba59abbe56e057f20f883e
// console.log(b64_md5('123456')) // 4QrcOUm6Wau+VuBX8g+IPg
// console.log(hex_hmac_md5('abcdefg', '123456')) // 9dae3c64aa3ebce7515e7bfdc0307ca7
// console.log(b64_hmac_md5('abcdefg', '123456')) // na48ZKo+vOdRXnv9wDB8pw
// console.log(calcMD5('123456')) // e10adc3949ba59abbe56e057f20f883e
var hexcase = 0
var b64pad = ''
var chrsz = 8
export function hex_md5(s) { return binl2hex(core_md5(str2binl(s), s.length * chrsz)) }
export function b64_md5(s) { return binl2b64(core_md5(str2binl(s), s.length * chrsz)) }
export function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)) }
export function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)) }
export function calcMD5(s) { return binl2hex(core_md5(str2binl(s), s.length * chrsz)) }
function core_md5(x, len) {
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)
}
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)
}
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); var 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)
}
function safe_add(x, y) {
var lsw = (x & 0xFFFF) + (y & 0xFFFF)
var msw = (x >> 16) + (y >> 16) + (lsw >> 16)
return (msw << 16) | (lsw & 0xFFFF)
}
function bit_rol(num, cnt) {
return (num << cnt) | (num >>> (32 - cnt))
}
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
}
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
}
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
}
Q.E.D.
