All files / src/node-obfuscators CatchClauseObfuscator.ts

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import * as estraverse from 'estraverse';
 
import { ICatchClauseNode } from "../interfaces/nodes/ICatchClauseNode";
import { INode } from '../interfaces/nodes/INode';
 
import { NodeObfuscator } from './NodeObfuscator';
 
/**
 * replaces:
 *     try {} catch (e) { console.log(e); };
 *
 * on:
 *     try {} catch (_0x12d45f) { console.log(_0x12d45f); };
 *
 */
export class CatchClauseObfuscator extends NodeObfuscator {
    /**
     * @type {Map<string, string>}
     */
    private catchClauseParam: Map <string, string> = new Map <string, string> ();
 
    /**
     * @param catchClauseNode
     */
    public obfuscateNode (catchClauseNode: ICatchClauseNode): void {
        this.storeCatchClauseParam(catchClauseNode);
        this.replaceCatchClauseParam(catchClauseNode);
    }
 
    /**
     * @param catchClauseNode
     */
    private storeCatchClauseParam (catchClauseNode: ICatchClauseNode): void {
        estraverse.traverse(catchClauseNode.param, {
            leave: (node: INode): any => this.storeIdentifiersNames(node, this.catchClauseParam)
        });
    }
 
    /**
     * @param catchClauseNode
     */
    private replaceCatchClauseParam (catchClauseNode: ICatchClauseNode): void {
        estraverse.replace(catchClauseNode, {
            leave: (node: INode, parentNode: INode): any => {
                this.replaceIdentifiersWithRandomNames(node, parentNode, this.catchClauseParam);
            }
        });
    }
}