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杨家亮
2026-03-25 14:54:15 +08:00
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uni_modules/uview-pro/libs/function/md5.ts
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/*
* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
* Digest Algorithm, as defined in RFC 1321.
* Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
* 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.
*/
let hexcase: number = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
let b64pad: string = ''; /* base-64 pad character. "=" for strict RFC compliance */
/**
* 这些是通常需要调用的函数
* @param s 输入字符串
* @returns 十六进制/BASE64/任意编码的MD5字符串
*/
function hex_md5(s: string): string {
return rstr2hex(rstr_md5(str2rstr_utf8(s)));
}
function b64_md5(s: string): string {
return rstr2b64(rstr_md5(str2rstr_utf8(s)));
}
function any_md5(s: string, e: string): string {
return rstr2any(rstr_md5(str2rstr_utf8(s)), e);
}
function hex_hmac_md5(k: string, d: string): string {
return rstr2hex(rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d)));
}
function b64_hmac_md5(k: string, d: string): string {
return rstr2b64(rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d)));
}
function any_hmac_md5(k: string, d: string, e: string): string {
return rstr2any(rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d)), e);
}
/**
* 执行简单自测，判断 VM 是否正常
* @returns 是否通过测试
*/
function md5_vm_test(): boolean {
return hex_md5('abc').toLowerCase() == '900150983cd24fb0d6963f7d28e17f72';
}
/**
* 计算原始字符串的 MD5
* @param s 原始字符串
* @returns MD5 结果字符串
*/
function rstr_md5(s: string): string {
return binl2rstr(binl_md5(rstr2binl(s), s.length * 8));
}
/**
* 计算 HMAC-MD5
* @param key 密钥
* @param data 数据
* @returns HMAC-MD5 结果字符串
*/
function rstr_hmac_md5(key: string, data: string): string {
let bkey: number[] = rstr2binl(key);
if (bkey.length > 16) bkey = binl_md5(bkey, key.length * 8);
const ipad: number[] = Array(16),
opad: number[] = Array(16);
for (let i = 0; i < 16; i++) {
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5c5c5c5c;
}
const hash: number[] = binl_md5(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
return binl2rstr(binl_md5(opad.concat(hash), 512 + 128));
}
/**
* 原始字符串转十六进制字符串
* @param input 输入字符串
* @returns 十六进制字符串
*/
function rstr2hex(input: string): string {
try {
hexcase;
} catch (e) {
hexcase = 0;
}
const hex_tab: string = hexcase ? '0123456789ABCDEF' : '0123456789abcdef';
let output = '';
let x: number;
for (let i = 0; i < input.length; i++) {
x = input.charCodeAt(i);
output += hex_tab.charAt((x >>> 4) & 0x0f) + hex_tab.charAt(x & 0x0f);
}
return output;
}
/**
* 原始字符串转 BASE64 字符串
* @param input 输入字符串
* @returns BASE64 字符串
*/
function rstr2b64(input: string): string {
try {
b64pad;
} catch (e) {
b64pad = '';
}
const tab: string = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
let output = '';
const len: number = input.length;
for (let i = 0; i < len; i += 3) {
const triplet: number =
(input.charCodeAt(i) << 16) |
(i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) |
(i + 2 < len ? input.charCodeAt(i + 2) : 0);
for (let j = 0; j < 4; j++) {
if (i * 8 + j * 6 > input.length * 8) output += b64pad;
else output += tab.charAt((triplet >>> (6 * (3 - j))) & 0x3f);
}
}
return output;
}
/**
* 原始字符串转任意编码字符串
* @param input 输入字符串
* @param encoding 编码表
* @returns 编码后的字符串
*/
function rstr2any(input: string, encoding: string): string {
const divisor: number = encoding.length;
let i: number, j: number, q: number, x: number, quotient: number[];
/* Convert to an array of 16-bit big-endian values, forming the dividend */
let dividend: number[] = Array(Math.ceil(input.length / 2));
for (i = 0; i < dividend.length; i++) {
dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
}
/*
* Repeatedly perform a long division. The binary array forms the dividend,
* the length of the encoding is the divisor. Once computed, the quotient
* forms the dividend for the next step. All remainders are stored for later
* use.
*/
const full_length: number = Math.ceil((input.length * 8) / (Math.log(encoding.length) / Math.log(2)));
const remainders: number[] = Array(full_length);
for (j = 0; j < full_length; j++) {
quotient = [];
x = 0;
for (i = 0; i < dividend.length; i++) {
x = (x << 16) + dividend[i];
q = Math.floor(x / divisor);
x -= q * divisor;
if (quotient.length > 0 || q > 0) quotient[quotient.length] = q;
}
remainders[j] = x;
dividend = quotient;
}
/* Convert the remainders to the output string */
let output = '';
for (i = remainders.length - 1; i >= 0; i--) output += encoding.charAt(remainders[i]);
return output;
}
/**
* 字符串转 UTF-8 编码
* @param input 输入字符串
* @returns UTF-8 编码字符串
*/
function str2rstr_utf8(input: string): string {
let output = '';
let i = -1;
let x: number, y: number;
while (++i < input.length) {
/* Decode utf-16 surrogate pairs */
x = input.charCodeAt(i);
y = i + 1 < input.length ? input.charCodeAt(i + 1) : 0;
if (0xd800 <= x && x <= 0xdbff && 0xdc00 <= y && y <= 0xdfff) {
x = 0x10000 + ((x & 0x03ff) << 10) + (y & 0x03ff);
i++;
}
/* Encode output as utf-8 */
if (x <= 0x7f) output += String.fromCharCode(x);
else if (x <= 0x7ff) output += String.fromCharCode(0xc0 | ((x >>> 6) & 0x1f), 0x80 | (x & 0x3f));
else if (x <= 0xffff)
output += String.fromCharCode(0xe0 | ((x >>> 12) & 0x0f), 0x80 | ((x >>> 6) & 0x3f), 0x80 | (x & 0x3f));
else if (x <= 0x1fffff)
output += String.fromCharCode(
0xf0 | ((x >>> 18) & 0x07),
0x80 | ((x >>> 12) & 0x3f),
0x80 | ((x >>> 6) & 0x3f),
0x80 | (x & 0x3f)
);
}
return output;
}
/**
* 字符串转 UTF-16LE 编码
* @param input 输入字符串
* @returns UTF-16LE 编码字符串
*/
function str2rstr_utf16le(input: string): string {
let output = '';
for (let i = 0; i < input.length; i++)
output += String.fromCharCode(input.charCodeAt(i) & 0xff, (input.charCodeAt(i) >>> 8) & 0xff);
return output;
}
/**
* 字符串转 UTF-16BE 编码
* @param input 输入字符串
* @returns UTF-16BE 编码字符串
*/
function str2rstr_utf16be(input: string): string {
let output = '';
for (let i = 0; i < input.length; i++)
output += String.fromCharCode((input.charCodeAt(i) >>> 8) & 0xff, input.charCodeAt(i) & 0xff);
return output;
}
/**
* 原始字符串转小端字数组
* @param input 输入字符串
* @returns 小端字数组
*/
function rstr2binl(input: string): number[] {
const output: number[] = Array(input.length >> 2);
for (let i = 0; i < output.length; i++) output[i] = 0;
for (let i = 0; i < input.length * 8; i += 8) output[i >> 5] |= (input.charCodeAt(i / 8) & 0xff) << i % 32;
return output;
}
/**
* 小端字数组转字符串
* @param input 小端字数组
* @returns 字符串
*/
function binl2rstr(input: number[]): string {
let output = '';
for (let i = 0; i < input.length * 32; i += 8) output += String.fromCharCode((input[i >> 5] >>> i % 32) & 0xff);
return output;
}
/**
* 计算小端字数组的 MD5
* @param x 小端字数组
* @param len 位长度
* @returns MD5 结果数组
*/
function binl_md5(x: number[], len: number): number[] {
/* append padding */
x[len >> 5] |= 0x80 << len % 32;
x[(((len + 64) >>> 9) << 4) + 14] = len;
let a = 1732584193;
let b = -271733879;
let c = -1732584194;
let d = 271733878;
for (let i = 0; i < x.length; i += 16) {
const olda = a;
const oldb = b;
const oldc = c;
const 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 [a, b, c, d];
}
/**
* 四种基本操作
*/
function md5_cmn(q: number, a: number, b: number, x: number, s: number, t: number): number {
return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
}
function md5_ff(a: number, b: number, c: number, d: number, x: number, s: number, t: number): number {
return md5_cmn((b & c) | (~b & d), a, b, x, s, t);
}
function md5_gg(a: number, b: number, c: number, d: number, x: number, s: number, t: number): number {
return md5_cmn((b & d) | (c & ~d), a, b, x, s, t);
}
function md5_hh(a: number, b: number, c: number, d: number, x: number, s: number, t: number): number {
return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a: number, b: number, c: number, d: number, x: number, s: number, t: number): number {
return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
}
/**
* 安全整数加法，防止溢出
* @param x 整数
* @param y 整数
* @returns 加法结果
*/
function safe_add(x: number, y: number): number {
const lsw: number = (x & 0xffff) + (y & 0xffff);
const msw: number = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xffff);
}
/**
* 左移位操作
* @param num 数字
* @param cnt 位数
* @returns 结果
*/
function bit_rol(num: number, cnt: number): number {
return (num << cnt) | (num >>> (32 - cnt));
}
/**
* 计算字符串的 MD5 值
* @param str 输入字符串
* @returns MD5 十六进制字符串
*/
function md5(str: string): string {
return hex_md5(str);
}
export default {
md5
};