All files / src/node-obfuscators LabeledStatementTransformer.ts

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
1x
 
 
 
 
 
1x
 
1x
1x
1x
1x
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1x
 
 
 
 
 
 
 
 
 
 
1x
 
1x
 
 
 
 
 
 
1x
1x
 
 
 
 
 
 
1x
1x
 
 
 
 
 
 
 
1x
 
18x
3x
 
 
 
 
 
 
import * as estraverse from 'estraverse';
import * as ESTree from 'estree';
 
import { ICustomNode } from '../interfaces/custom-nodes/ICustomNode';
import { IOptions } from '../interfaces/IOptions';
 
import { NodeType } from '../enums/NodeType';
 
import { AbstractNodeObfuscator } from './AbstractNodeObfuscator';
import { IdentifierReplacer } from './replacers/IdentifierReplacer';
import { Node } from '../node/Node';
import { NodeUtils } from '../node/NodeUtils';
 
/**
 * replaces:
 *     label: {
 *          for (var i = 0; i < 1000; i++) {
 *              break label;
 *          }
 *     }
 *
 * on:
 *     _0x12d45f: {
 *          for (var i = 0; i < 1000; i++) {
 *              break _0x12d45f;
 *          }
 *     }
 *
 */
export class LabeledStatementObfuscator extends AbstractNodeObfuscator {
    /**
     * @type {IdentifierReplacer}
     */
    private identifierReplacer: IdentifierReplacer;
 
    /**
     * @param nodes
     * @param options
     */
    constructor(nodes: Map <string, ICustomNode>, options: IOptions) {
        super(nodes, options);
 
        this.identifierReplacer = new IdentifierReplacer(this.nodes, this.options);
    }
 
    /**
     * @param labeledStatementNode
     */
    public obfuscateNode (labeledStatementNode: ESTree.LabeledStatement): void {
        this.storeLabeledStatementName(labeledStatementNode);
        this.replaceLabeledStatementName(labeledStatementNode);
    }
 
    /**
     * @param labeledStatementNode
     */
    private storeLabeledStatementName (labeledStatementNode: ESTree.LabeledStatement): void {
        NodeUtils.typedReplace(labeledStatementNode.label, NodeType.Identifier, {
            enter: (node: ESTree.Identifier) => this.identifierReplacer.storeNames(node.name)
        });
    }
 
    /**
     * @param labeledStatementNode
     */
    private replaceLabeledStatementName (labeledStatementNode: ESTree.LabeledStatement): void {
        estraverse.replace(labeledStatementNode, {
            enter: (node: ESTree.Node, parentNode: ESTree.Node): any => {
                if (Node.isLabelIdentifierNode(node, parentNode)) {
                    node.name = this.identifierReplacer.replace(node.name);
                }
            }
        });
    }
}