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
// deno-fmt-ignore-file// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
'use strict';
const common = require('../common');const assert = require('assert');
[-1, 10].forEach((offset) => {  assert.throws(    () => Buffer.alloc(9).write('foo', offset),    {      code: 'ERR_OUT_OF_RANGE',      name: 'RangeError',      message: 'The value of "offset" is out of range. ' +               `It must be >= 0 && <= 9. Received ${offset}`    }  );});
const resultMap = new Map([  ['utf8', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])],  ['ucs2', Buffer.from([102, 0, 111, 0, 111, 0, 0, 0, 0])],  ['ascii', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])],  ['latin1', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])],  ['binary', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])],  ['utf16le', Buffer.from([102, 0, 111, 0, 111, 0, 0, 0, 0])],  ['base64', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])],  ['base64url', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])],  ['hex', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])],]);
// utf8, ucs2, ascii, latin1, utf16leconst encodings = ['utf8', 'utf-8', 'ucs2', 'ucs-2', 'ascii', 'latin1',                   'binary', 'utf16le', 'utf-16le'];
encodings  .reduce((es, e) => es.concat(e, e.toUpperCase()), [])  .forEach((encoding) => {    const buf = Buffer.alloc(9);    const len = Buffer.byteLength('foo', encoding);    assert.strictEqual(buf.write('foo', 0, len, encoding), len);
    if (encoding.includes('-'))      encoding = encoding.replace('-', '');
    assert.deepStrictEqual(buf, resultMap.get(encoding.toLowerCase()));  });
// base64['base64', 'BASE64', 'base64url', 'BASE64URL'].forEach((encoding) => {  const buf = Buffer.alloc(9);  const len = Buffer.byteLength('Zm9v', encoding);
  assert.strictEqual(buf.write('Zm9v', 0, len, encoding), len);  assert.deepStrictEqual(buf, resultMap.get(encoding.toLowerCase()));});
// hex['hex', 'HEX'].forEach((encoding) => {  const buf = Buffer.alloc(9);  const len = Buffer.byteLength('666f6f', encoding);
  assert.strictEqual(buf.write('666f6f', 0, len, encoding), len);  assert.deepStrictEqual(buf, resultMap.get(encoding.toLowerCase()));});
// Invalid encodingsfor (let i = 1; i < 10; i++) {  const encoding = String(i).repeat(i);  const error = common.expectsError({    code: 'ERR_UNKNOWN_ENCODING',    name: 'TypeError',    message: `Unknown encoding: ${encoding}`  });
  assert.ok(!Buffer.isEncoding(encoding));  assert.throws(() => Buffer.alloc(9).write('foo', encoding), error);}
// UCS-2 overflow CVE-2018-12115for (let i = 1; i < 4; i++) {  // Allocate two Buffers sequentially off the pool. Run more than once in case  // we hit the end of the pool and don't get sequential allocations  const x = Buffer.allocUnsafe(4).fill(0);  const y = Buffer.allocUnsafe(4).fill(1);  // Should not write anything, pos 3 doesn't have enough room for a 16-bit char  assert.strictEqual(x.write('ыыыыыы', 3, 'ucs2'), 0);  // CVE-2018-12115 experienced via buffer overrun to next block in the pool  assert.strictEqual(Buffer.compare(y, Buffer.alloc(4, 1)), 0);}
// Should not write any data when there is no space for 16-bit charsconst z = Buffer.alloc(4, 0);assert.strictEqual(z.write('\u0001', 3, 'ucs2'), 0);assert.strictEqual(Buffer.compare(z, Buffer.alloc(4, 0)), 0);// Make sure longer strings are written up to the buffer end.assert.strictEqual(z.write('abcd', 2), 2);assert.deepStrictEqual([...z], [0, 0, 0x61, 0x62]);
// Large overrun could corrupt the processassert.strictEqual(Buffer.alloc(4)  .write('ыыыыыы'.repeat(100), 3, 'utf16le'), 0);
{  // .write() does not affect the byte after the written-to slice of the Buffer.  // Refs: https://github.com/nodejs/node/issues/26422  const buf = Buffer.alloc(8);  assert.strictEqual(buf.write('ыы', 1, 'utf16le'), 4);  assert.deepStrictEqual([...buf], [0, 0x4b, 0x04, 0x4b, 0x04, 0, 0, 0]);}