85 lines
2.2 KiB
TypeScript
85 lines
2.2 KiB
TypeScript
/*
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* Copyright (C) Sapphirecode - All Rights Reserved
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* This file is part of Auth-Server-Helper which is released under MIT.
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* See file 'LICENSE' for full license details.
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* Created by Timo Hocker <timo@scode.ovh>, December 2020
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*/
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import { debug } from './debug';
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const logger = debug ('blacklist');
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interface Signature {
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hash: string;
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iat: number;
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}
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class Blacklist {
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private _signatures: Signature[];
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public constructor () {
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this._signatures = [];
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}
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public clear (before: number = Number.POSITIVE_INFINITY): void {
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logger.extend ('clear') ('clearing blacklist');
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for (let i = this._signatures.length - 1; i >= 0; i--) {
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if (this._signatures[i].iat < before)
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this.remove_signature (i);
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}
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}
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public add_signature (hash: string): void {
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logger.extend ('add_signature') ('blacklisting signature %s', hash);
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this._signatures.push ({ iat: Date.now (), hash });
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}
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public remove_signature (signature: number | string): void {
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const log = logger.extend ('remove_signature');
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log ('removing signature from blacklist %s', signature);
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if (typeof signature === 'string') {
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log ('received string, searching through signatures');
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for (let i = this._signatures.length - 1; i >= 0; i--) {
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if (this._signatures[i].hash === signature)
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this._signatures.splice (i, 1);
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}
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}
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else {
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log ('received index, removing at index');
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this._signatures.splice (signature, 1);
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}
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}
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public is_valid (hash: string): boolean {
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const log = logger.extend ('is_valid');
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log ('checking signature for blacklist entry %s', hash);
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for (const sig of this._signatures) {
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if (sig.hash === hash) {
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log ('found matching blacklist entry');
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return false;
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}
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}
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log ('signature is not blacklisted');
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return true;
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}
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public export_blacklist (): Signature[] {
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logger.extend ('export_blacklist') ('exporting blacklist');
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return this._signatures;
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}
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public import_blacklist (data: Signature[]): void {
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logger.extend ('import_blacklist') (
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'importing %d blacklist entries',
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data.length
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);
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this._signatures.push (...data);
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}
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}
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const bl = (new Blacklist);
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export { Blacklist };
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export default bl;
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