forked from javascript-obfuscator/javascript-obfuscator
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathObfuscator.ts
More file actions
171 lines (146 loc) · 6.67 KB
/
Obfuscator.ts
File metadata and controls
171 lines (146 loc) · 6.67 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
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
import { injectable, inject } from 'inversify';
import { ServiceIdentifiers } from './container/ServiceIdentifiers';
import * as estraverse from 'estraverse';
import * as ESTree from 'estree';
import { TNodeTransformersFactory } from './types/container/TNodeTransformersFactory';
import { TVisitorDirection } from './types/TVisitorDirection';
import { ICustomNodeGroup } from './interfaces/custom-nodes/ICustomNodeGroup';
import { IObfuscationEventEmitter } from './interfaces/event-emitters/IObfuscationEventEmitter';
import { IObfuscator } from './interfaces/IObfuscator';
import { IOptions } from './interfaces/options/IOptions';
import { INodeTransformer } from './interfaces/node-transformers/INodeTransformer';
import { IStackTraceAnalyzer } from './interfaces/stack-trace-analyzer/IStackTraceAnalyzer';
import { IStackTraceData } from './interfaces/stack-trace-analyzer/IStackTraceData';
import { IStorage } from './interfaces/storages/IStorage';
import { NodeTransformers } from './enums/container/NodeTransformers';
import { NodeType } from './enums/NodeType';
import { ObfuscationEvents } from './enums/ObfuscationEvents';
import { VisitorDirection } from './enums/VisitorDirection';
import { Node } from './node/Node';
import { NodeUtils } from './node/NodeUtils';
@injectable()
export class Obfuscator implements IObfuscator {
/**
* @type {Map<string, NodeTransformers[]>}
*/
private static readonly nodeControlFlowTransformersMap: Map <string, NodeTransformers[]> = new Map <string, NodeTransformers[]> ([
[NodeType.FunctionDeclaration, [NodeTransformers.FunctionControlFlowTransformer]],
[NodeType.FunctionExpression, [NodeTransformers.FunctionControlFlowTransformer]]
]);
/**
* @type {Map<string, NodeTransformers[]>}
*/
private static readonly nodeObfuscatorsMap: Map <string, NodeTransformers[]> = new Map <string, NodeTransformers[]> ([
[NodeType.ArrowFunctionExpression, [NodeTransformers.FunctionObfuscator]],
[NodeType.ClassDeclaration, [NodeTransformers.FunctionDeclarationObfuscator]],
[NodeType.CatchClause, [NodeTransformers.CatchClauseObfuscator]],
[NodeType.FunctionDeclaration, [
NodeTransformers.FunctionDeclarationObfuscator,
NodeTransformers.FunctionObfuscator
]],
[NodeType.FunctionExpression, [NodeTransformers.FunctionObfuscator]],
[NodeType.MemberExpression, [NodeTransformers.MemberExpressionObfuscator]],
[NodeType.MethodDefinition, [NodeTransformers.MethodDefinitionObfuscator]],
[NodeType.ObjectExpression, [NodeTransformers.ObjectExpressionObfuscator]],
[NodeType.VariableDeclaration, [NodeTransformers.VariableDeclarationObfuscator]],
[NodeType.LabeledStatement, [NodeTransformers.LabeledStatementObfuscator]],
[NodeType.Literal, [NodeTransformers.LiteralObfuscator]]
]);
/**
* @type {IStorage<ICustomNodeGroup>}
*/
private readonly customNodeGroupStorage: IStorage<ICustomNodeGroup>;
/**
* @type {TNodeTransformersFactory}
*/
private readonly nodeTransformersFactory: TNodeTransformersFactory;
/**
* @type {IObfuscationEventEmitter}
*/
private readonly obfuscationEventEmitter: IObfuscationEventEmitter;
/**
* @type {IOptions}
*/
private readonly options: IOptions;
/**
* @type {IStackTraceAnalyzer}
*/
private readonly stackTraceAnalyzer: IStackTraceAnalyzer;
/**
* @param stackTraceAnalyzer
* @param obfuscationEventEmitter
* @param customNodeGroupStorage
* @param nodeTransformersFactory
* @param options
*/
constructor (
@inject(ServiceIdentifiers.IStackTraceAnalyzer) stackTraceAnalyzer: IStackTraceAnalyzer,
@inject(ServiceIdentifiers.IObfuscationEventEmitter) obfuscationEventEmitter: IObfuscationEventEmitter,
@inject(ServiceIdentifiers['IStorage<ICustomNodeGroup>']) customNodeGroupStorage: IStorage<ICustomNodeGroup>,
@inject(ServiceIdentifiers['Factory<INodeTransformer[]>']) nodeTransformersFactory: TNodeTransformersFactory,
@inject(ServiceIdentifiers.IOptions) options: IOptions
) {
this.stackTraceAnalyzer = stackTraceAnalyzer;
this.obfuscationEventEmitter = obfuscationEventEmitter;
this.customNodeGroupStorage = customNodeGroupStorage;
this.nodeTransformersFactory = nodeTransformersFactory;
this.options = options;
}
/**
* @param astTree
* @returns {ESTree.Program}
*/
public obfuscateAstTree (astTree: ESTree.Program): ESTree.Program {
if (Node.isProgramNode(astTree) && !astTree.body.length) {
return astTree;
}
NodeUtils.parentize(astTree);
const stackTraceData: IStackTraceData[] = this.stackTraceAnalyzer.analyze(astTree.body);
// initialize custom node groups and configure custom nodes
this.customNodeGroupStorage
.getStorage()
.forEach((customNodeGroup: ICustomNodeGroup) => {
customNodeGroup.initialize();
this.obfuscationEventEmitter.once(
customNodeGroup.getAppendEvent(),
customNodeGroup.appendCustomNodes.bind(customNodeGroup)
);
});
this.obfuscationEventEmitter.emit(ObfuscationEvents.BeforeObfuscation, astTree, stackTraceData);
// first pass: control flow flattening
if (this.options.controlFlowFlattening) {
this.transformAstTree(
astTree,
VisitorDirection.leave,
this.nodeTransformersFactory(Obfuscator.nodeControlFlowTransformersMap)
);
}
// second pass: nodes obfuscation
this.transformAstTree(
astTree,
VisitorDirection.enter,
this.nodeTransformersFactory(Obfuscator.nodeObfuscatorsMap)
);
this.obfuscationEventEmitter.emit(ObfuscationEvents.AfterObfuscation, astTree, stackTraceData);
return astTree;
}
/**
* @param astTree
* @param direction
* @param nodeTransformersConcreteFactory
*/
private transformAstTree (
astTree: ESTree.Program,
direction: TVisitorDirection,
nodeTransformersConcreteFactory: (nodeType: string) => INodeTransformer[]
): void {
estraverse.traverse(astTree, {
[direction]: (node: ESTree.Node, parentNode: ESTree.Node): void => {
const nodeTransformers: INodeTransformer[] = nodeTransformersConcreteFactory(node.type);
nodeTransformers.forEach((nodeTransformer: INodeTransformer) => {
nodeTransformer.transformNode(node, parentNode);
});
}
});
}
}