# Phase 1: Critical Security & Risk Mitigation - COMPLETED ✅

**Completion Date**: $(date)
**Status**: All tasks completed successfully

---

## Summary

Phase 1 focused on addressing critical security vulnerabilities and production readiness issues. All 8 planned tasks have been completed, and both apps pass type checking.

---

## ✅ Completed Tasks

### 1. Add Sensitive Files to .gitignore ✅

**Files Modified**:

- `apps/admin/.gitignore`
- `apps/mobile/.gitignore`

**Changes**:

- Added all `.env` variants to gitignore
- Added database files (`*.db`, `*.sqlite`, `backups/`)
- Added log files (`*.log`, `server.log`)
- Ensures sensitive data won't be committed in the future

**Impact**: Prevents future accidental commits of secrets

---

### 2. Create .env.example Files ✅

**Files Created/Updated**:

- `apps/admin/.env.example` - Complete example with all required variables
- `apps/mobile/.env.example` - Updated with better documentation

**Contents**:

- Clear documentation of each environment variable
- Links to where to obtain API keys
- Placeholders instead of real values
- Comments explaining usage

**Impact**: Makes it easy for new developers to set up their environment

---

### 3. Document Exposed Keys That Need Rotation ✅

**File Created**: `SECURITY.md` (root of repository)

**Documentation Includes**:

- List of all exposed API keys with severity levels
- Step-by-step rotation instructions for each service:
  - Clerk keys (admin & mobile)
  - DeepSeek API key
- Instructions for removing secrets from git history (BFG Repo-Cleaner + git filter-branch)
- Prevention measures implemented
- Additional security recommendations

**CRITICAL ACTION REQUIRED** (manual step):

```bash
# You must manually:
1. Go to https://dashboard.clerk.com and rotate secret keys
2. Go to https://platform.deepseek.com and delete exposed key
3. Update your local .env files with new keys (DO NOT commit)
4. Run git history cleanup commands from SECURITY.md
5. Force push to remove exposed secrets from git history
```

**Impact**: Provides clear action plan for key rotation

---

### 4. Add Role-Based Authorization Middleware ✅

**File Created**: `apps/admin/src/lib/auth-middleware.ts`

**Features**:

- `requireAuth()` - Validates authentication and checks user roles
- `isSelfModification()` - Detects if user is modifying their own account
- `preventSelfModification()` - Prevents self-deletion and self-demotion
- TypeScript types for UserRole
- Comprehensive JSDoc documentation
- Returns either auth result or error response

**Example Usage**:

```typescript
const authResult = await requireAuth(["admin", "superAdmin"]);
if (authResult instanceof NextResponse) return authResult;
const { userId, role } = authResult;
```

**Impact**: Reusable authorization for all API endpoints

---

### 5. Fix DELETE /api/users Authorization Vulnerability ✅

**File Modified**: `apps/admin/src/app/api/users/route.ts`

**Security Fixes**:

- ❌ Before: Any authenticated user could delete any user
- ✅ After: Only admin/superAdmin can delete users
- Added self-deletion prevention (can't delete own account)
- Bulk delete checks for self-deletion in array
- Uses new `requireAuth()` and `preventSelfModification()` helpers

**Code Changes**:

```typescript
// Before (NO authorization)
export async function DELETE(request: NextRequest) {
  const db = await getDatabase();
  // ... delete logic

// After (WITH authorization)
export async function DELETE(request: NextRequest) {
  const authResult = await requireAuth(["admin", "superAdmin"]);
  if (authResult instanceof NextResponse) return authResult;

  const selfModError = preventSelfModification(userId, targetId, "delete");
  if (selfModError) return selfModError;
  // ... delete logic
```

**Impact**: Critical vulnerability fixed - prevents unauthorized user deletion

---

### 6. Add Rate Limiting to Authentication Endpoints ✅

**File Created**: `apps/admin/src/lib/rate-limit.ts`

**Features**:

- In-memory rate limiter (production-ready for single server)
- Configurable limits per endpoint type:
  - Login: 5 attempts per minute
  - Register: 3 attempts per hour
  - API endpoints: 100 requests per minute
- Rate limits by both IP and email/userId
- Returns proper 429 status with `Retry-After` header
- Automatic cleanup of expired entries
- `getClientIdentifier()` helper supports IP extraction from proxy headers

**Files Modified**:

- `apps/admin/src/app/api/auth/login/route.ts` - Added rate limiting
- `apps/admin/src/app/api/auth/register/route.ts` - Added rate limiting

**Implementation**:

```typescript
const ipRateLimitError = rateLimit(ipIdentifier, RATE_LIMITS.login);
if (ipRateLimitError) return ipRateLimitError;

const emailRateLimitError = rateLimit(`email:${email}`, RATE_LIMITS.login);
if (emailRateLimitError) return emailRateLimitError;
```

**Impact**: Protects against brute force attacks and spam

**Note for Production**: For multi-server deployments, replace in-memory store with Redis.

---

### 7. Replace Hardcoded ngrok URL with Environment Variable ✅

**File Modified**: `apps/mobile/src/config/api.ts`

**Changes**:

- ❌ Before: Hardcoded ngrok URL that expires
- ✅ After: Uses `EXPO_PUBLIC_API_URL` from environment
- Validates URL format on startup
- Throws helpful error if not set in production
- Falls back to localhost in development with warning

**Code**:

```typescript
// Before
export const API_BASE_URL = __DEV__
  ? "https://fd87cefe27ae.ngrok-free.app" // ❌ Hardcoded
  : "https://your-production-url.com"; // ❌ Placeholder

// After
const getApiBaseUrl = (): string => {
  const envUrl = process.env.EXPO_PUBLIC_API_URL;
  if (envUrl) return envUrl;

  if (__DEV__) {
    console.warn("EXPO_PUBLIC_API_URL not set - using localhost");
    return "http://localhost:3000";
  }

  throw new Error("EXPO_PUBLIC_API_URL must be set in production");
};
```

**Impact**: Production builds will work, and developers can use any development URL

---

### 8. Add Environment Validation on App Startup ✅

**Files Created**:

- `apps/admin/src/lib/env.ts` - Admin environment validation
- `apps/mobile/src/utils/env.ts` - Mobile environment validation

**Files Modified**:

- `apps/admin/src/middleware.ts` - Validates env on server startup
- `apps/mobile/src/app/_layout.tsx` - Validates env on app launch

**Features**:

- Validates all required environment variables exist
- Type-safe environment variable access via `getEnv()`
- Caches validation result for performance
- Throws descriptive errors with setup instructions
- Mobile app validates URL format
- Helper functions: `isDevelopment()`, `isProduction()`

**Admin Required Vars**:

- `NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY`
- `CLERK_SECRET_KEY`
- `DEEPSEEK_API_KEY`

**Mobile Required Vars**:

- `EXPO_PUBLIC_CLERK_PUBLISHABLE_KEY`
- `EXPO_PUBLIC_API_URL`

**Error Example**:

```
❌ Environment validation failed:
Missing required environment variable: CLERK_SECRET_KEY
Missing required environment variable: DEEPSEEK_API_KEY

Please check your .env file and ensure all required variables are set.
See .env.example for the list of required variables.
```

**Impact**: Apps won't start with invalid configuration, preventing runtime errors

---

## 🧪 Verification

### Type Checking

```bash
✅ npm run typecheck:admin - PASSED
✅ npm run typecheck:mobile - PASSED
```

No TypeScript errors in either app.

---

## 📊 Security Improvements

| Area                  | Before                            | After                                         | Status            |
| --------------------- | --------------------------------- | --------------------------------------------- | ----------------- |
| **Secrets in Git**    | ❌ Exposed in .env files          | ✅ Gitignored, documented for rotation        | 🟡 Needs rotation |
| **Authorization**     | ❌ DELETE endpoint unprotected    | ✅ Role-based auth + self-deletion prevention | ✅ Complete       |
| **Rate Limiting**     | ❌ No protection                  | ✅ IP + email rate limiting on auth endpoints | ✅ Complete       |
| **Env Variables**     | ❌ Hardcoded URLs, no validation  | ✅ Validated on startup with helpful errors   | ✅ Complete       |
| **Production Config** | ❌ Placeholder URLs, missing vars | ✅ Fails fast with clear instructions         | ✅ Complete       |

---

## 🚨 Manual Actions Required

### CRITICAL - Key Rotation (Do This ASAP)

1. **Rotate Clerk Keys**:

   ```bash
   # Go to https://dashboard.clerk.com
   # Navigate to your project → API Keys
   # Click "Regenerate" for secret key
   # Update webhook secret in Webhooks section
   # Update your local .env files (both apps)
   ```

2. **Rotate DeepSeek Key**:

   ```bash
   # Go to https://platform.deepseek.com
   # Navigate to API Keys
   # Delete key: sk-6c2e965d97a349f08ae1c3386dabdf85
   # Generate new key
   # Update apps/admin/.env
   ```

3. **Clean Git History**:

   ```bash
   # Follow instructions in SECURITY.md
   # Use BFG Repo-Cleaner or git filter-branch
   # Force push to remove secrets from history
   # Coordinate with team before force pushing
   ```

4. **Update Production Environment Variables**:
   - Update Vercel/Netlify/hosting platform with new keys
   - Ensure EXPO_PUBLIC_API_URL is set for mobile production builds

---

## 📝 Files Changed Summary

### Created (7 files):

1. `SECURITY.md` - Key rotation documentation
2. `apps/admin/src/lib/auth-middleware.ts` - Authorization helpers
3. `apps/admin/src/lib/rate-limit.ts` - Rate limiting
4. `apps/admin/src/lib/env.ts` - Environment validation
5. `apps/mobile/src/utils/env.ts` - Environment validation

### Modified (7 files):

1. `apps/admin/.gitignore` - Added sensitive files
2. `apps/mobile/.gitignore` - Added sensitive files
3. `apps/admin/.env.example` - Complete documentation
4. `apps/mobile/.env.example` - Better documentation
5. `apps/admin/src/app/api/users/route.ts` - Fixed DELETE authorization
6. `apps/admin/src/app/api/auth/login/route.ts` - Added rate limiting
7. `apps/admin/src/app/api/auth/register/route.ts` - Added rate limiting
8. `apps/admin/src/middleware.ts` - Added env validation
9. `apps/mobile/src/config/api.ts` - Env-based API URL
10. `apps/mobile/src/app/_layout.tsx` - Added env validation

---

## 🎯 Next Steps

### Ready for Phase 2: Database Schema & Performance Foundation

With security fixed, you can now proceed to:

1. Add database indexes for performance
2. Fix type inconsistencies across packages
3. Implement proper migrations
4. Add database constraints

Would you like to proceed with Phase 2?

---

## 📚 Additional Documentation

For detailed implementation of each component, see:

- Authorization: `apps/admin/src/lib/auth-middleware.ts`
- Rate Limiting: `apps/admin/src/lib/rate-limit.ts`
- Environment Validation: `apps/admin/src/lib/env.ts`, `apps/mobile/src/utils/env.ts`
- Security Procedures: `SECURITY.md`

---

**Phase 1 Status**: ✅ COMPLETE
**Estimated Time**: 2-3 days (as planned)
**Actual Implementation**: ~1-2 hours (implementation time)
**Next Phase**: Ready to begin Phase 2
