/
md5.js
184 lines (158 loc) 路 6.33 KB
/
md5.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
/**
* This is a file that is used to convert string to md5 hash.
* (c) 2018 | xn-02f Lab
* License: MIT
*/
/**
* Convert string to md5 hash.
*
* @param {string} data The raw string you want to convert.
* @return {string} The hexadecimal hash string that is handled and converted.
* @example
* ```
* import md5 from '@xn-02f/md5';
* md5('xn-02f'); //=> '54d30fa674d13e3598970bc9c5e2388e'
* ```
*/
export default data => {
const stringUTF8 = unescape(encodeURIComponent(data));
const stringNumArr = rstr2binl(stringUTF8);
const binlMD5Arr = binlMD5(stringNumArr, stringUTF8.length * 8);
const rawString = binl2rstr(binlMD5Arr);
return rawStringToHex(rawString);
}
const rstr2binl = input => {
let output = [];
output[(input.length >> 2) - 1] = undefined;
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;
}
const safeAdd = (x, y) => {
let lsw = (x & 0xffff) + (y & 0xffff);
let msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xffff);
}
/**
* bitRotateLeft rotates x left n bits.
*/
const bitRotateLeft = (num, cnt) => (num << cnt) | (num >>> (32 - cnt));
const md5cmn = (q, a, b, x, s, t) => safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b);
/**
* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
* Rotation is separate from addition to prevent recomputation.
*/
const FF = (a, b, c, d, x, s, t) => md5cmn((b & c) | (~b & d), a, b, x, s, t);
const GG = (a, b, c, d, x, s, t) => md5cmn((b & d) | (c & ~d), a, b, x, s, t);
const HH = (a, b, c, d, x, s, t) => md5cmn(b ^ c ^ d, a, b, x, s, t);
const II = (a, b, c, d, x, s, t) => md5cmn(c ^ (b | ~d), a, b, x, s, t);
const binlMD5 = (x, len) => {
// 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;
const originA = a;
const originB = b;
const originC = c;
const originD = d;
for (let i = 0; i < x.length; i += 16) {
/* Round 1 */
a = FF(a, b, c, d, x[i], 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);
/* Round 2 */
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], 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);
/* Round 3 */
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], 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);
/* Round 4 */
a = II(a, b, c, d, x[i], 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);
/* Round Last */
a = safeAdd(a, originA);
b = safeAdd(b, originB);
c = safeAdd(c, originC);
d = safeAdd(d, originD);
}
return [a, b, c, d];
}
const binl2rstr = input => {
const length32 = input.length * 32;
let output = '';
for (let i = 0; i < length32; i += 8) {
output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xff);
}
return output;
}
const rawStringToHex = input => {
const hexTab = '0123456789abcdef';
let output = '';
for (let i = 0; i < input.length; i += 1) {
let x = input.charCodeAt(i);
output += hexTab.charAt((x >>> 4) & 0x0f) + hexTab.charAt(x & 0x0f);
}
return output;
}