otp-challenger

# OTP Identity Challenge Skill Challenge users for fresh two-factor authentication before sensitive actions. ## When to Use Require OTP verification before: - Deploy commands (`kubectl apply`, `terraform apply`) - Financial operations (transfers, payment approvals) - Data access (PII exports, customer data) - Admin operations (user modifications, permission changes) ## Scripts ### verify.sh Verify a user's OTP code and record verification state. ```bash ./verify.sh <user_id> <code> ``` **Parameters:** - `user_id` - Identifier for the user (e.g., email, username) - `code` - Either 6-digit TOTP or 44-character YubiKey OTP **Exit codes:** - `0` - Verification successful - `1` - Invalid code or rate limited - `2` - Configuration error (missing secret, invalid format) **Output on success:** ``` ✅ OTP verified for <user_id> (valid for 24 hours) ✅ YubiKey verified for <user_id> (valid for 24 hours) ``` **Output on failure:** ``` ❌ Invalid OTP code ❌ Too many attempts. Try again in X minutes. ❌ Invalid code format. Expected 6-digit TOTP or 44-character YubiKey OTP. ``` ### check-status.sh Check if a user's verification is still valid. ```bash ./check-status.sh <user_id> ``` **Exit codes:** - `0` - User has valid (non-expired) verification - `1` - User not verified or verification expired **Output:** ``` ✅ Valid for 23 more hours ⚠️ Expired 2 hours ago ❌ Never verified ``` ### generate-secret.sh Generate a new TOTP secret with QR code (requires `qrencode` to be installed). ```bash ./generate-secret.sh <account_name> ``` ## Usage Pattern ```bash #!/bin/bash source ../otp/verify.sh if ! verify_otp "$USER_ID" "$OTP_CODE"; then echo "🔒 This action requires OTP verification" exit 1 fi # Proceed with sensitive action ``` ## Configuration **Required for TOTP:** - `OTP_SECRET` - Base32 TOTP secret **Required for YubiKey:** - `YUBIKEY_CLIENT_ID` - Yubico API client ID - `YUBIKEY_SECRET_KEY` - Yubico API secret key (base64) **Optional:** - `OTP_INTERVAL_HOURS` - Verification expiry (default: 24) - `OTP_MAX_FAILURES` - Failed attempts before rate limiting (default: 3) - `OTP_STATE_FILE` - State file path (default: `memory/otp-state.json`) Configuration can be set via environment variables or in `~/.openclaw/config.yaml`: ```yaml security: otp: secret: "BASE32_SECRET" yubikey: clientId: "12345" secretKey: "base64secret" ``` ## Code Format Detection The script auto-detects code type: - **6 digits** (`123456`) → TOTP validation - **44 ModHex characters** (`cccccc...`) → YubiKey validation ModHex alphabet: `cbdefghijklnrtuv` ## State File Verification state stored in `memory/otp-state.json`. Contains only timestamps, no secrets. ## Human Documentation See **[README.md](./README.md)** for: - Installation instructions - Setup guides (TOTP and YubiKey) - Security considerations - Troubleshooting - Examples