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NodeObfuscator.ts
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143 lines (119 loc) · 4.28 KB
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import { ICustomNode } from '../interfaces/ICustomNode';
import { INodeObfuscator } from '../interfaces/INodeObfuscator';
import { INode } from "../interfaces/nodes/INode";
import { IOptions } from "../interfaces/IOptions";
import { JSFuck } from "../enums/JSFuck";
import { NodeUtils } from "../NodeUtils";
import { UnicodeArrayNode } from "../custom-nodes/unicode-array-nodes/UnicodeArrayNode";
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.get<string[]>('reservedNames')
.some((reservedName: string) => {
return new RegExp(reservedName, 'g').test(name);
});
}
/**
* @param node
* @param parentNode
* @param namesMap
*/
protected replaceNodeIdentifierByNewValue (node: INode, parentNode: INode, namesMap: Map <string, string>): void {
if (NodeUtils.isIdentifierNode(node) && namesMap.has(node.name)) {
const parentNodeIsPropertyNode: boolean = (
NodeUtils.isPropertyNode(parentNode) &&
parentNode.key === node
),
parentNodeIsMemberExpressionNode: boolean = (
NodeUtils.isMemberExpressionNode(parentNode) &&
parentNode.computed === false &&
parentNode.property === node
);
if (parentNodeIsPropertyNode || parentNodeIsMemberExpressionNode) {
return;
}
node.name = namesMap.get(node.name);
}
}
/**
* @param nodeValue
* @returns {string}
*/
protected replaceLiteralBooleanByJSFuck (nodeValue: boolean): string {
return nodeValue ? JSFuck.True : JSFuck.False;
}
/**
* @param nodeValue
* @returns {string}
*/
protected replaceLiteralNumberByHexadecimalValue (nodeValue: number): string {
const prefix: string = '0x';
if (!Utils.isInteger(nodeValue)) {
return String(nodeValue);
}
return `${prefix}${Utils.decToHex(nodeValue)}`;
}
/**
* @param nodeValue
* @returns {string}
*/
protected replaceLiteralValueByUnicodeValue (nodeValue: string): string {
let value: string = nodeValue,
replaceByUnicodeArrayFlag: boolean = Math.random() <= this.options.get('unicodeArrayThreshold');
if (this.options.get('encodeUnicodeLiterals') && replaceByUnicodeArrayFlag) {
value = Utils.btoa(value);
}
value = Utils.stringToUnicode(value);
if (!this.options.get('unicodeArray') || !replaceByUnicodeArrayFlag) {
return value;
}
return this.replaceLiteralValueByUnicodeArrayCall(value);
}
/**
* @param value
* @returns {string}
*/
protected replaceLiteralValueByUnicodeArrayCall (value: string): string {
let unicodeArrayNode: UnicodeArrayNode = <UnicodeArrayNode> this.nodes.get('unicodeArrayNode'),
unicodeArray: string[] = unicodeArrayNode.getNodeData(),
sameIndex: number = unicodeArray.indexOf(value),
index: number,
hexadecimalIndex: string;
if (sameIndex >= 0) {
index = sameIndex;
} else {
index = unicodeArray.length;
unicodeArrayNode.updateNodeData(value);
}
hexadecimalIndex = this.replaceLiteralNumberByHexadecimalValue(index);
if (this.options.get('wrapUnicodeArrayCalls')) {
return `${this.nodes.get('unicodeArrayCallsWrapper').getNodeIdentifier()}('${hexadecimalIndex}')`;
}
return `${unicodeArrayNode.getNodeIdentifier()}[${hexadecimalIndex}]`;
}
}