All files / src/node-obfuscators NodeObfuscator.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
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
 
 
 
 
 
 
 
 
1x
 
1x
1x
 
1x
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
368x
368x
 
 
 
 
 
 
 
 
 
 
 
 
 
45x
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
45x
45x
 
 
 
 
 
 
 
 
 
 
 
 
 
3465x
 
125x
 
 
 
125x
 
 
 
 
125x
 
 
 
125x
 
 
 
 
 
 
 
 
24x
 
 
 
 
 
 
 
102x
 
102x
2x
 
 
100x
 
 
 
 
 
 
 
105x
 
105x
 
 
 
105x
 
105x
26x
 
 
79x
 
 
 
 
 
 
 
26x
 
26x
 
 
 
26x
26x
26x
26x
 
26x
13x
 
13x
13x
 
 
26x
 
26x
24x
 
24x
 
 
 
24x
 
 
2x
 
 
 
import { ICustomNode } from '../interfaces/custom-nodes/ICustomNode';
import { INodeObfuscator } from '../interfaces/INodeObfuscator';
import { INode } from "../interfaces/nodes/INode";
import { IOptions } from "../interfaces/IOptions";
 
import { TUnicodeArrayCallsWrapper } from "../types/custom-nodes/TUnicodeArrayCallsWrapper";
import { TUnicodeArrayNode } from "../types/custom-nodes/TUnicodeArrayNode";
 
import { JSFuck } from "../enums/JSFuck";
 
import { Nodes } from "../Nodes";
import { Utils } from '../Utils';
 
export abstract class NodeObfuscator implements INodeObfuscator {
    /**
     * @type Map <string, Node>
     */
    protected nodes: Map <string, ICustomNode>;
 
    /**
     * @type {IOptions}
     */
    protected options: IOptions;
 
    /**
     * @param nodes
     * @param options
     */
    constructor(nodes: Map <string, ICustomNode>, options: IOptions) {
        this.nodes = nodes;
        this.options = options;
    }
 
    /**
     * @param node
     * @param parentNode
     */
    public abstract obfuscateNode (node: INode, parentNode?: INode): void;
 
    /**
     * @param name
     * @returns {boolean}
     */
    protected isReservedName (name: string): boolean {
        return this.options.reservedNames
            .some((reservedName: string) => {
                return new RegExp(reservedName, 'g').test(name);
            });
    }
 
    /**
     * Store all identifiers names as keys in given `namesMap` with random names as value.
     * Reserved names will be ignored.
     *
     * @param node
     * @param namesMap
     */
    protected storeIdentifiersNames (
        node: INode,
        namesMap: Map <string, string>
    ): void {
        Eif (Nodes.isIdentifierNode(node) && !this.isReservedName(node.name)) {
            namesMap.set(node.name, Utils.getRandomVariableName());
        }
    }
 
    /**
     * @param node
     * @param parentNode
     * @param namesMap
     */
    protected replaceIdentifiersWithRandomNames (
        node: INode,
        parentNode: INode,
        namesMap: Map <string, string>
    ): void {
        if (Nodes.isIdentifierNode(node) && namesMap.has(node.name)) {
            const parentNodeIsPropertyNode: boolean = (
                    Nodes.isPropertyNode(parentNode) &&
                    parentNode.key === node
                ),
                parentNodeIsMemberExpressionNode: boolean = (
                    Nodes.isMemberExpressionNode(parentNode) &&
                    parentNode.computed === false &&
                    parentNode.property === node
                );
 
            Iif (parentNodeIsPropertyNode || parentNodeIsMemberExpressionNode) {
                return;
            }
 
            node.name = <string>namesMap.get(node.name);
        }
    }
 
    /**
     * @param nodeValue
     * @returns {string}
     */
    protected replaceLiteralBooleanWithJSFuck (nodeValue: boolean): string {
        return nodeValue ? JSFuck.True : JSFuck.False;
    }
 
    /**
     * @param nodeValue
     * @returns {string}
     */
    protected replaceLiteralNumberWithHexadecimalValue (nodeValue: number): string {
        const prefix: string = '0x';
 
        if (!Utils.isInteger(nodeValue)) {
            return String(nodeValue);
        }
 
        return `${prefix}${Utils.decToHex(nodeValue)}`;
    }
 
    /**
     * @param nodeValue
     * @returns {string}
     */
    protected replaceLiteralValueWithUnicodeValue (nodeValue: string): string {
        let replaceWithUnicodeArrayFlag: boolean = Math.random() <= this.options.unicodeArrayThreshold;
 
        Iif (this.options.encodeUnicodeLiterals && replaceWithUnicodeArrayFlag) {
            nodeValue = Utils.btoa(nodeValue);
        }
 
        nodeValue = Utils.stringToUnicode(nodeValue);
 
        if (this.options.unicodeArray && replaceWithUnicodeArrayFlag) {
            return this.replaceLiteralValueWithUnicodeArrayCall(nodeValue);
        }
 
        return nodeValue;
    }
 
    /**
     * @param value
     * @returns {string}
     */
    protected replaceLiteralValueWithUnicodeArrayCall (value: string): string {
        let unicodeArrayNode: TUnicodeArrayNode = <TUnicodeArrayNode>this.nodes.get('unicodeArrayNode');
 
        Iif (!unicodeArrayNode) {
            throw new ReferenceError('`unicodeArrayNode` node is not found in Map with custom nodes.');
        }
 
        let unicodeArray: string[] = unicodeArrayNode.getNodeData(),
            valueIndex: number = unicodeArray.indexOf(value),
            literalValueCallIndex: number,
            hexadecimalIndex: string;
 
        if (valueIndex >= 0) {
            literalValueCallIndex = valueIndex;
        } else {
            literalValueCallIndex = unicodeArray.length;
            unicodeArrayNode.updateNodeData(value);
        }
 
        hexadecimalIndex = this.replaceLiteralNumberWithHexadecimalValue(literalValueCallIndex);
 
        if (this.options.wrapUnicodeArrayCalls) {
            let unicodeArrayCallsWrapper: TUnicodeArrayCallsWrapper = <TUnicodeArrayCallsWrapper>this.nodes.get('unicodeArrayCallsWrapper');
 
            Iif (!unicodeArrayCallsWrapper) {
                throw new ReferenceError('`unicodeArrayCallsWrapper` node is not found in Map with custom nodes.');
            }
 
            return `${unicodeArrayCallsWrapper.getNodeIdentifier()}('${hexadecimalIndex}')`;
        }
 
        return `${unicodeArrayNode.getNodeIdentifier()}[${hexadecimalIndex}]`;
    }
}