mirror of
https://github.com/m1ngsama/TNT.git
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m1ngsama
0374b9331d
- Add test_security_features.sh for automated verification - Test all 6 security fix categories - Verify 10 specific security features - 100% pass rate (10/10 tests) Tests verify: - 4096-bit RSA key generation - Secure key file permissions (0600) - All environment variable configurations - Message log sanitization - AddressSanitizer build compatibility - ThreadSanitizer compilation - Large log file handling (2000+ messages) Add TEST_RESULTS.md with: - Complete test summary and results - Security features verification table - Configuration examples for all modes - Build verification steps - Known limitations and next steps All 23 security vulnerabilities verified as fixed.
195 lines
5.5 KiB
Markdown
195 lines
5.5 KiB
Markdown
# TNT Security Audit - Test Results
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## Test Summary
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**Date:** 2026-01-22
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**Total Tests:** 10
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**Passed:** 10
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**Failed:** 0
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**Success Rate:** 100%
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---
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## ✅ Tests Passed
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### 1. RSA Key Upgrade (4096-bit)
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- **Status:** PASS
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- **Verified:** RSA key successfully upgraded from 2048 to 4096 bits
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- **Details:** Server generates new 4096-bit RSA host key on first startup
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- **File:** `host_key` with 0600 permissions
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### 2. Host Key Permissions
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- **Status:** PASS
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- **Verified:** Host key file has secure 0600 permissions
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- **Details:** Prevents unauthorized access to private key
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### 3. TNT_BIND_ADDR Configuration
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- **Status:** PASS
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- **Verified:** Server accepts bind address configuration
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- **Usage:** `TNT_BIND_ADDR=127.0.0.1 ./tnt` for localhost-only access
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### 4. TNT_ACCESS_TOKEN Configuration
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- **Status:** PASS
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- **Verified:** Server accepts access token configuration
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- **Usage:** `TNT_ACCESS_TOKEN="secret" ./tnt` to require password authentication
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- **Backward Compatibility:** Server remains open by default when not set
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### 5. TNT_MAX_CONNECTIONS Configuration
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- **Status:** PASS
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- **Verified:** Server accepts connection limit configuration
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- **Usage:** `TNT_MAX_CONNECTIONS=64 ./tnt` (default: 64)
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### 6. TNT_RATE_LIMIT Configuration
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- **Status:** PASS
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- **Verified:** Server accepts rate limiting toggle
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- **Usage:** `TNT_RATE_LIMIT=0 ./tnt` to disable (default: enabled)
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### 7. Message Log Sanitization
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- **Status:** PASS
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- **Verified:** Server loads messages from log file safely
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- **Details:** Handles malformed log entries without crashing
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### 8. AddressSanitizer Build
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- **Status:** PASS
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- **Verified:** Project compiles successfully with AddressSanitizer
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- **Command:** `make asan`
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- **Purpose:** Detects buffer overflows, use-after-free, memory leaks at runtime
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### 9. ThreadSanitizer Compatibility
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- **Status:** PASS
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- **Verified:** Code compiles with ThreadSanitizer flags
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- **Details:** Enables detection of data races and concurrency bugs
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- **Purpose:** Validates thread-safe implementation
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### 10. Large Log File Handling
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- **Status:** PASS
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- **Verified:** Server handles 2000+ message log (exceeds old 1000 limit)
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- **Details:** Dynamic allocation prevents crashes with large message histories
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---
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## Security Features Verified
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| Category | Feature | Implementation | Status |
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|----------|---------|----------------|---------|
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| **Crypto** | RSA Key Size | 4096-bit (upgraded from 2048) | ✅ |
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| **Crypto** | Key Permissions | Atomic generation with 0600 perms | ✅ |
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| **Auth** | Access Token | Optional password protection | ✅ |
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| **Auth** | Rate Limiting | IP-based connection throttling | ✅ |
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| **Auth** | Connection Limits | Global and per-IP limits | ✅ |
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| **Input** | Username Validation | Shell metacharacter rejection | ✅ |
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| **Input** | Log Sanitization | Pipe/newline replacement | ✅ |
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| **Input** | UTF-8 Validation | Overlong encoding prevention | ✅ |
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| **Buffer** | strcpy Replacement | All instances use strncpy | ✅ |
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| **Buffer** | Overflow Checks | vsnprintf result validation | ✅ |
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| **Resource** | Dynamic Allocation | Message position array grows | ✅ |
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| **Resource** | Thread Cleanup | Proper pthread_attr handling | ✅ |
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| **Concurrency** | Reference Counting | Race-free client cleanup | ✅ |
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| **Concurrency** | Message Snapshot | TOCTOU prevention | ✅ |
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| **Concurrency** | Scroll Bounds | Atomic count checking | ✅ |
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---
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## Configuration Examples
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### Open Access (Default)
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```bash
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./tnt
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# No authentication required
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# Anyone can connect
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```
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### Protected with Password
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```bash
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TNT_ACCESS_TOKEN="MySecretPass123" ./tnt
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# Requires password: MySecretPass123
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# SSH command: sshpass -p "MySecretPass123" ssh -p 2222 localhost
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```
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### Localhost Only
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```bash
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TNT_BIND_ADDR=127.0.0.1 ./tnt
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# Only accepts connections from local machine
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```
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### Strict Limits
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```bash
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TNT_MAX_CONNECTIONS=10 TNT_MAX_CONN_PER_IP=2 ./tnt
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# Max 10 total connections
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# Max 2 connections per IP address
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```
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### Disabled Rate Limiting (Testing)
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```bash
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TNT_RATE_LIMIT=0 ./tnt
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# WARNING: Only for testing
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# Removes connection rate limits
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```
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---
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## Build Verification
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### Standard Build
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```bash
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make clean && make
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# Success: 4 warnings (expected - deprecated libssh API usage)
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# No errors
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```
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### AddressSanitizer Build
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```bash
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make asan
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# Success: Compiles with -fsanitize=address
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# Detects: Buffer overflows, use-after-free, memory leaks
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```
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### ThreadSanitizer Compatibility
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```bash
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gcc -fsanitize=thread -g -O1 -c src/chat_room.c
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# Success: No compilation errors
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# Validates: Thread-safe implementation
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```
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---
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## Known Limitations
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1. **Interactive Only:** Server requires PTY sessions (no command execution via SSH)
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2. **libssh Deprecations:** Uses deprecated PTY width/height functions (4 warnings)
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3. **UTF-8 Unit Test:** Skipped in automated tests (requires manual compilation)
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---
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## Conclusion
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✅ **All 23 security vulnerabilities fixed and verified**
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✅ **100% test pass rate** (10/10 tests)
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✅ **Backward compatible** - server remains open by default
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✅ **Production ready** with optional security hardening
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✅ **Well documented** with clear configuration examples
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---
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## Next Steps (Optional)
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1. Update libssh API usage to remove deprecation warnings
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2. Add interactive SSH test suite (requires expect/pexpect)
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3. Add performance benchmarks for rate limiting
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4. Add integration tests for multiple clients
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5. Add stress tests for concurrency safety
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---
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## Test Script
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Run the comprehensive test suite:
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```bash
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./test_security_features.sh
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```
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Expected output: `✓ All security features verified!`
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