aitbc/docs/advanced/06_security/1_security-cleanup-guide.md

# AITBC Security Cleanup & GitHub Setup Guide

## ✅ COMPLETE SECURITY FIXES (2026-02-19)

### Critical Vulnerabilities Resolved

1. **Smart Contract Security Audit Complete**
   - ✅ **0 vulnerabilities** found in actual contract code
   - ✅ **35 Slither findings** (34 OpenZeppelin informational warnings, 1 Solidity version note)
   - ✅ **OpenZeppelin v5.0.0** upgrade completed for latest security features
   - ✅ Contracts verified as production-ready

### Critical Vulnerabilities Resolved

1. **Hardcoded Secrets Eliminated**
   - ✅ JWT secret removed from `config_pg.py` - now required from environment
   - ✅ PostgreSQL credentials removed from `db_pg.py` - parsed from DATABASE_URL
   - ✅ Added validation to fail-fast if secrets aren't provided

2. **Authentication Gaps Closed**
   - ✅ Exchange API now uses session-based authentication
   - ✅ Fixed hardcoded `user_id=1` - uses authenticated context
   - ✅ Added login/logout endpoints with wallet authentication

3. **CORS Restrictions Implemented**
   - ✅ Replaced wildcard origins with specific localhost URLs
   - ✅ Applied across all services (Coordinator, Exchange, Blockchain, Gossip)
   - ✅ Unauthorized origins now receive 400 Bad Request

4. **Wallet Encryption Enhanced**
   - ✅ Replaced weak XOR encryption with Fernet (AES-128 CBC)
   - ✅ Added PBKDF2 key derivation with SHA-256
   - ✅ Integrated keyring for password management

5. **Database Sessions Unified**
   - ✅ Migrated all routers to use `storage.SessionDep`
   - ✅ Removed legacy session dependencies
   - ✅ Consistent session management across services

6. **Structured Error Responses**
   - ✅ Implemented standardized error responses across all APIs
   - ✅ Added `ErrorResponse` and `ErrorDetail` Pydantic models
   - ✅ All exceptions now have `error_code`, `status_code`, and `to_response()` method

7. **Health Check Endpoints**
   - ✅ Added liveness and readiness probes
   - ✅ `/health/live` - Simple alive check
   - ✅ `/health/ready` - Database connectivity check

## 🔐 SECURITY FINDINGS

### Files Currently Tracked That Should Be Removed

**High Priority - Remove Immediately:**
1. `.windsurf/` - Entire IDE configuration directory
   - Contains local IDE settings, skills, and workflows
   - Should never be in a public repository

2. **Infrastructure secrets files:**
   - `infra/k8s/sealed-secrets.yaml` - Contains sealed secrets configuration
   - `infra/terraform/environments/secrets.tf` - References AWS Secrets Manager

### Files With Hardcoded Credentials (Documentation/Examples)

**Low Priority - These are examples but should be cleaned:**
- `website/docs/coordinator-api.html` - Contains `SECRET_KEY=your-secret-key`
- `website/docs/wallet-daemon.html` - Contains `password="password"`
- `website/docs/pool-hub.html` - Contains `POSTGRES_PASSWORD=pass`

## 🚨 IMMEDIATE ACTIONS REQUIRED

### 1. Remove Sensitive Files from Git History
```bash
# Remove .windsurf directory completely
git filter-branch --force --index-filter 'git rm -rf --cached --ignore-unmatch .windsurf/' --prune-empty --tag-name-filter cat -- --all

# Remove infrastructure secrets files
git filter-branch --force --index-filter 'git rm -rf --cached --ignore-unmatch infra/k8s/sealed-secrets.yaml infra/terraform/environments/secrets.tf' --prune-empty --tag-name-filter cat -- --all

# Clean up
git for-each-ref --format='delete %(refname)' refs/original | git update-ref --stdin
git reflog expire --expire=now --all && git gc --prune=now --aggressive
```

### 2. Update .gitignore
Add these lines to `.gitignore`:
```
# IDE configurations
.windsurf/
.snapshots/
.vscode/
.idea/

# Additional security
*.env
*.env.*
*.key
*.pem
*.crt
*.p12
secrets/
credentials/
infra/k8s/sealed-secrets.yaml
infra/terraform/environments/secrets.tf
```

### 3. Replace Hardcoded Examples
Replace documentation examples with placeholder variables:
- `SECRET_KEY=your-secret-key` → `SECRET_KEY=${SECRET_KEY}`
- `password="password"` → `password="${DB_PASSWORD}"`
- `POSTGRES_PASSWORD=pass` → `POSTGRES_PASSWORD=${POSTGRES_PASSWORD}`

## 🐙 GITHUB REPOSITORY SETUP

### Repository Description
```
AITBC - AI Trusted Blockchain Computing Platform
A comprehensive blockchain-based marketplace for AI computing services with zero-knowledge proof verification and confidential transaction support.
```

### Recommended Topics
```
blockchain ai-computing marketplace zero-knowledge-proofs confidential-transactions web3 python fastapi react typescript kubernetes terraform helm decentralized gpu-computing zk-proofs cryptography smart-contracts
```

### Repository Settings to Configure

**Security Settings:**
- ✅ Enable "Security advisories"
- ✅ Enable "Dependabot alerts"
- ✅ Enable "Dependabot security updates"
- ✅ Enable "Code security" (GitHub Advanced Security if available)
- ✅ Enable "Secret scanning"

**Branch Protection:**
- ✅ Require pull request reviews
- ✅ Require status checks to pass
- ✅ Require up-to-date branches
- ✅ Include administrators
- ✅ Require conversation resolution

**Integration Settings:**
- ✅ Enable "Issues"
- ✅ Enable "Projects"
- ✅ Enable "Wikis"
- ✅ Enable "Discussions"
- ✅ Enable "Packages"

## 📋 FINAL CHECKLIST

### Before Pushing to GitHub:
- [ ] Remove `.windsurf/` directory from git history
- [ ] Remove `infra/k8s/sealed-secrets.yaml` from git history
- [ ] Remove `infra/terraform/environments/secrets.tf` from git history
- [ ] Update `.gitignore` with all exclusions
- [ ] Replace hardcoded credentials in documentation
- [ ] Scan for any remaining sensitive files
- [ ] Test that the repository still builds/works

### After GitHub Setup:
- [ ] Configure repository settings
- [ ] Set up branch protection rules
- [ ] Enable security features
- [ ] Add README with proper setup instructions
- [ ] Add SECURITY.md for vulnerability reporting
- [ ] Add CONTRIBUTING.md for contributors

## 🔍 TOOLS FOR VERIFICATION

### Scan for Credentials:
```bash
# Install truffleHog
pip install trufflehog

# Scan repository
trufflehog filesystem --directory /path/to/repo

# Alternative: git-secrets
git secrets --scan -r
```

### Git History Analysis:
```bash
# Check for large files
git rev-list --objects --all | git cat-file --batch-check='%(objecttype) %(objectname) %(objectsize) %(rest)' | sed -n 's/^blob //p' | sort -n --key=2 | tail -20

# Check for sensitive patterns
git log -p --all | grep -E "(password|secret|key|token)" | head -20
```

## ⚠️ IMPORTANT NOTES

1. **Force Push Required**: After removing files from history, you'll need to force push:
   ```bash
   git push origin --force --all
   git push origin --force --tags
   ```

2. **Team Coordination**: Notify all team members before force pushing as they'll need to re-clone the repository.

3. **Backup**: Create a backup of the current repository before making these changes.

4. **CI/CD Updates**: Update any CI/CD pipelines that might reference the removed files.

5. **Documentation**: Update deployment documentation to reflect the changes in secrets management.