Repository navigation
Expand file tree
/
Copy pathJavaScriptObfuscatorInternal.ts
More file actions
131 lines (109 loc) · 4.03 KB
/
Copy pathJavaScriptObfuscatorInternal.ts
File metadata and controls
131 lines (109 loc) · 4.03 KB
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
import { injectable, inject } from 'inversify';
import { ServiceIdentifiers } from './container/ServiceIdentifiers';
import * as esprima from 'esprima';
import * as escodegen from 'escodegen';
import * as ESTree from 'estree';
import { ICustomNode } from './interfaces/custom-nodes/ICustomNode';
import { IJavaScriptObfuscator } from './interfaces/IJavaScriptObfsucator';
import { IObfuscationResult } from './interfaces/IObfuscationResult';
import { IObfuscator } from './interfaces/IObfuscator';
import { IGeneratorOutput } from './interfaces/IGeneratorOutput';
import { IOptions } from './interfaces/options/IOptions';
import { ISourceMapCorrector } from './interfaces/ISourceMapCorrector';
import { IStorage } from './interfaces/storages/IStorage';
import { Utils } from './Utils';
@injectable()
export class JavaScriptObfuscatorInternal implements IJavaScriptObfuscator {
/**
* @type {GenerateOptions}
*/
private static readonly escodegenParams: escodegen.GenerateOptions = {
verbatim: 'x-verbatim-property',
sourceMapWithCode: true
};
/**
* @type {esprima.Options}
*/
private static readonly esprimaParams: esprima.Options = {
loc: true
};
/**
* @type {IStorage<ICustomNode>}
*/
private readonly customNodesStorage: IStorage<ICustomNode>;
/**
* @type {IObfuscator}
*/
private readonly obfuscator: IObfuscator;
/**
* @type {IOptions}
*/
private readonly options: IOptions;
/**
* @type {ISourceMapCorrector}
*/
private readonly sourceMapCorrector: ISourceMapCorrector;
/**
* @param obfuscator
* @param sourceMapCorrector
* @param customNodesStorage
* @param options
*/
constructor (
@inject(ServiceIdentifiers.IObfuscator) obfuscator: IObfuscator,
@inject(ServiceIdentifiers.ISourceMapCorrector) sourceMapCorrector: ISourceMapCorrector,
@inject(ServiceIdentifiers['IStorage<ICustomNode>']) customNodesStorage: IStorage<ICustomNode>,
@inject(ServiceIdentifiers.IOptions) options: IOptions
) {
this.obfuscator = obfuscator;
this.sourceMapCorrector = sourceMapCorrector;
this.customNodesStorage = customNodesStorage;
this.options = options;
}
/**
* @param sourceCode
* @param astTree
*/
private generateCode (sourceCode: string, astTree: ESTree.Program): IGeneratorOutput {
const escodegenParams: escodegen.GenerateOptions = Object.assign(
{},
JavaScriptObfuscatorInternal.escodegenParams
);
if (this.options.sourceMap) {
escodegenParams.sourceMap = 'sourceMap';
escodegenParams.sourceContent = sourceCode;
}
escodegenParams.format = {
compact: this.options.compact
};
const generatorOutput: IGeneratorOutput = escodegen.generate(astTree, escodegenParams);
generatorOutput.map = generatorOutput.map ? generatorOutput.map.toString() : '';
return generatorOutput;
}
/**
* @param generatorOutput
* @returns {IObfuscationResult}
*/
private getObfuscationResult (generatorOutput: IGeneratorOutput): IObfuscationResult {
return this.sourceMapCorrector.correct(
generatorOutput.code,
generatorOutput.map
);
}
/**
* @param sourceCode
* @returns {IObfuscationResult}
*/
public obfuscate (sourceCode: string): IObfuscationResult {
if (this.options.seed !== 0) {
Utils.setRandomGeneratorSeed(this.options.seed);
}
// parse AST tree
const astTree: ESTree.Program = esprima.parse(sourceCode, JavaScriptObfuscatorInternal.esprimaParams);
// obfuscate AST tree
const obfuscatedAstTree: ESTree.Program = this.obfuscator.obfuscateAstTree(astTree, this.customNodesStorage);
// generate code
const generatorOutput: IGeneratorOutput = this.generateCode(sourceCode, obfuscatedAstTree);
return this.getObfuscationResult(generatorOutput);
}
}