| 39 | } |
| 40 | |
| 41 | async validateAccessCode(inputCode: string): Promise<boolean> { |
| 42 | try { |
| 43 | const now = Date.now(); |
| 44 | |
| 45 | if (now - this.lastAttemptTime > this.RATE_LIMIT_WINDOW) { |
| 46 | this.attemptCount = 0; |
| 47 | } |
| 48 | |
| 49 | this.attemptCount++; |
| 50 | this.lastAttemptTime = now; |
| 51 | |
| 52 | if (this.attemptCount > this.MAX_ATTEMPTS) { |
| 53 | await new Promise(resolve => setTimeout(resolve, 3000)); |
| 54 | } |
| 55 | |
| 56 | const isValid = await bcrypt.compare(inputCode, this.SECRET_ACCESS_CODE_HASH); |
| 57 | |
| 58 | if (isValid) { |
| 59 | this.attemptCount = 0; |
| 60 | } |
| 61 | |
| 62 | return isValid; |
| 63 | } catch (error) { |
| 64 | return false; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | async unlockSecretData(accessCode: string): Promise<{ flag: string } | null> { |
| 69 | const isValid = await this.validateAccessCode(accessCode); |