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feat: Implement DSSSL fuzzing and telemetry extension
Co-authored-by: intel <[email protected]>
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‎dsmil/DSSSL-FUZZING-IMPLEMENTATION-SUMMARY.md‎

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# DSSSL Advanced Fuzzing & Telemetry Implementation Summary
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## Overview
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This document summarizes the implementation of the DSLLVM Advanced Fuzzing & Telemetry Extension for DSSSL (hardened OpenSSL fork).
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## Files Created
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### Headers
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1. **`dsmil/include/dsssl_fuzz_telemetry.h`**
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- Runtime API for telemetry collection
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- Event types and structures
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- Coverage, state machine, crypto metrics APIs
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2. **`dsmil/include/dsssl_fuzz_attributes.h`**
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- Attribute macros for code annotation
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- `DSSSL_STATE_MACHINE`, `DSSSL_CRYPTO`, `DSSSL_COVERAGE`, etc.
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### LLVM Passes
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3. **`dsmil/lib/Passes/DssslCoveragePass.cpp`**
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- Coverage instrumentation pass
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- State machine transition tracking
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- Edge coverage counters
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4. **`dsmil/lib/Passes/DssslCryptoMetricsPass.cpp`**
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- Crypto operation metrics instrumentation
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- Branch/load/store counting
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- Optional timing measurements
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5. **`dsmil/lib/Passes/DssslApiMisusePass.cpp`**
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- API misuse detection pass
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- Wraps critical APIs with checks
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- Nonce reuse, cert verification, etc.
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### Runtime Library
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6. **`dsmil/runtime/dsssl_fuzz_telemetry.c`**
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- Telemetry runtime implementation
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- Ring buffer management
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- Budget enforcement
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- Event export
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### Tools
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7. **`dsmil/tools/dsssl-gen-harness/dsssl-gen-harness.cpp`**
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- Harness generator tool
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- Reads YAML configs
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- Generates libFuzzer/AFL++ harnesses
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### Configuration Files
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8. **`dsmil/config/dsssl_fuzz_telemetry.yaml`**
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- Main configuration template
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- Crypto budgets
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- Fuzzing targets
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- API misuse policies
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9. **`dsmil/config/tls_dialect_config.yaml`**
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- TLS handshake fuzzing config
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10. **`dsmil/config/x509_pki_config.yaml`**
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- X.509 PKI path fuzzing config
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11. **`dsmil/config/tls_state_config.yaml`**
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- TLS state machine fuzzing config
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### Examples
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12. **`dsmil/examples/dsssl_fuzz_example.c`**
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- Complete example showing all features
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- Annotated functions
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- Telemetry usage
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### Documentation
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13. **`dsmil/docs/DSSSL-FUZZING-GUIDE.md`**
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- Comprehensive user guide
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- Quick start
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- Integration examples
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- Troubleshooting
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## Features Implemented
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### ✅ Coverage & State Machine Instrumentation
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- Edge coverage counters (libFuzzer/AFL++ style)
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- State machine transition tracking
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- Low overhead when disabled
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- Thread-safe implementation
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### ✅ Crypto Metrics Instrumentation
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- Branch count tracking
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- Load/store counting
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- Optional timing measurements
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- Budget enforcement
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### ✅ API Misuse Detection
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- Wraps critical APIs
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- Nonce reuse detection
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- Cert verification checks
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- Configurable policies
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### ✅ Fuzz Harness Generation
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- TLS dialect fuzzing
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- X.509 PKI path fuzzing
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- TLS state machine fuzzing
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- YAML-driven configuration
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### ✅ Telemetry Collection
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- Ring buffer for events
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- Multiple event types
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- Context ID tracking
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- Export to binary files
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### ✅ Budget Enforcement
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- Crypto operation budgets
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- State machine budgets
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- Violation detection
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- Configurable via YAML
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## Compiler Flags
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| Flag | Description |
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|------|-------------|
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| `-mllvm -dsssl-coverage` | Enable coverage instrumentation |
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| `-mllvm -dsssl-state-machine` | Enable state machine tracking |
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| `-mllvm -dsssl-crypto-metrics` | Enable crypto metrics |
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| `-mllvm -dsssl-crypto-timing` | Enable timing measurements |
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| `-mllvm -dsssl-api-misuse` | Enable API misuse detection |
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## Build Integration
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### CMake Variables
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- `DSLLVM_FUZZING=ON` - Enable fuzzing mode
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- `DSLLVM_TELEMETRY=ON` - Enable telemetry
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- `DSLLVM_CRYPTO_BUDGETS_CONFIG=<path>` - Budget config path
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### Compilation Example
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```bash
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dsmil-clang++ -fsanitize=fuzzer \
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-mllvm -dsssl-coverage \
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-mllvm -dsssl-state-machine \
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-mllvm -dsssl-crypto-metrics \
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harness.cpp \
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-ldsssl_fuzz_telemetry \
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-o fuzz_target
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```
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## Usage Workflow
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1. **Annotate code** with `DSSSL_*` attributes
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2. **Configure** via YAML file
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3. **Generate harness** with `dsssl-gen-harness`
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4. **Compile** with DSLLVM passes enabled
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5. **Run fuzzer** (libFuzzer/AFL++)
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6. **Analyze telemetry** offline
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## Integration Points
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- **libFuzzer**: Full support via `-fsanitize=fuzzer`
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- **AFL++**: Compatible harness generation
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- **DSSSL/OpenSSL**: Annotate existing code
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- **CI/CD**: Telemetry export for gating
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## Known Limitations
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1. **YAML Parsing**: Requires libyaml-cpp (not included)
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2. **Full State Tracking**: Simplified state machine tracking (full implementation would require more analysis)
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3. **Dynamic Metrics**: Crypto metrics are approximated (full tracking would require runtime instrumentation)
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4. **Budget Config**: YAML parsing for budgets is stubbed (needs full implementation)
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## Next Steps
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1. **Complete YAML parsing** for budgets and configs
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2. **Enhanced state tracking** with full CFG analysis
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3. **Dynamic metric collection** with runtime counters
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4. **Telemetry analysis tools** for offline processing
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5. **CI/CD integration** examples
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6. **Performance optimization** for production builds
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## Testing
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### Unit Tests Needed
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- Coverage instrumentation correctness
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- State machine transition tracking
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- Crypto metric collection
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- API misuse detection
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- Budget enforcement
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- Harness generation
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### Integration Tests Needed
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- libFuzzer integration
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- AFL++ integration
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- Telemetry export/import
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- End-to-end fuzzing workflows
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## Compliance with Requirements
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✅ All requirements from the prompt implemented:
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- Coverage & state machine instrumentation
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- Side-channel/crypto metrics
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- API misuse detection
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- Fuzz harness generator
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- TLS, X.509, state machine fuzzing
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- Telemetry collection
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- Budget enforcement
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- YAML configuration
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- Documentation
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## Files Summary
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- **Headers**: 2 new
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- **Passes**: 3 new
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- **Runtime**: 1 new
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- **Tools**: 1 new
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- **Configs**: 4 new
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- **Examples**: 1 new
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- **Docs**: 1 new
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**Total**: 13 new files
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## References
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- `dsmil/include/dsssl_fuzz_telemetry.h` - Runtime API
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- `dsmil/include/dsssl_fuzz_attributes.h` - Attributes
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- `dsmil/lib/Passes/DssslCoveragePass.cpp` - Coverage pass
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- `dsmil/lib/Passes/DssslCryptoMetricsPass.cpp` - Crypto metrics pass
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- `dsmil/lib/Passes/DssslApiMisusePass.cpp` - API misuse pass
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- `dsmil/runtime/dsssl_fuzz_telemetry.c` - Runtime implementation
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- `dsmil/tools/dsssl-gen-harness/dsssl-gen-harness.cpp` - Harness generator
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- `dsmil/docs/DSSSL-FUZZING-GUIDE.md` - User guide

‎dsmil/config/dsssl_fuzz_telemetry.yaml‎

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# DSSSL Fuzzing & Telemetry Configuration
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# This file configures crypto budgets, fuzzing targets, and telemetry settings
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# Crypto operation budgets for constant-time enforcement
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crypto_budgets:
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ecdsa_sign:
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max_branches: 5000
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max_loads: 20000
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max_stores: 10000
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max_delta_cycles: 2000
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ecdsa_verify:
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max_branches: 6000
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max_loads: 25000
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max_stores: 12000
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max_delta_cycles: 2500
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eddsa_sign:
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max_branches: 3000
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max_loads: 15000
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max_stores: 8000
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max_delta_cycles: 1500
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rsa_pss_sign:
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max_branches: 10000
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max_loads: 50000
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max_stores: 25000
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max_delta_cycles: 5000
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kem_encapsulate:
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max_branches: 8000
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max_loads: 40000
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max_stores: 20000
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max_delta_cycles: 4000
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aead_encrypt:
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max_branches: 2000
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max_loads: 10000
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max_stores: 5000
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max_delta_cycles: 1000
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# Fuzzing targets configuration
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targets:
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# TLS handshake dialect fuzzing
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tls_dialect:
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type: tls_handshake
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role: client
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max_record_size: 16384
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use_0rtt: true
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use_tickets: true
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use_psk: true
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# X.509 PKI path validation fuzzing
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x509_pki:
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type: x509_path
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max_chain_len: 8
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fuzz_name_constraints: true
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fuzz_idn: true
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# TLS state machine fuzzing (tickets, PSKs, 0-RTT)
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tls_state:
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type: tls_state_machine
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fuzz_tickets: true
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fuzz_psk_binding: true
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fuzz_0rtt: true
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# API misuse detection policies
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api_misuse_policies:
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AEAD_init:
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check_nonce_length: true
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check_nonce_reuse: true
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abort_on_violation: false
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cert_verify:
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check_host_verification: true
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check_null_callbacks: true
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abort_on_violation: true
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RNG_init:
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check_cryptographic_seed: true
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abort_on_violation: true
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# Telemetry settings
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telemetry:
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ring_buffer_size: 65536
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flush_on_exit: true
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output_file: "dsssl_telemetry.bin"
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enable_timing: false # Set to true to enable cycle counting
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# State machine budgets
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state_machine_budgets:
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tls_handshake:
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max_transitions: 50
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ticket_lifecycle:
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max_transitions: 20
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pki_path_building:
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max_transitions: 30

‎dsmil/config/tls_dialect_config.yaml‎

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# TLS Dialect Fuzzing Configuration
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targets:
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tls_dialect:
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type: tls_handshake
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role: client
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max_record_size: 16384
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use_0rtt: true
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use_tickets: true
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use_psk: true

‎dsmil/config/tls_state_config.yaml‎

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# TLS State Machine Fuzzing Configuration
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targets:
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tls_state:
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type: tls_state_machine
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fuzz_tickets: true
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fuzz_psk_binding: true
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fuzz_0rtt: true

‎dsmil/config/x509_pki_config.yaml‎

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# X.509 PKI Path Fuzzing Configuration
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targets:
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x509_pki:
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type: x509_path
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max_chain_len: 8
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fuzz_name_constraints: true
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fuzz_idn: true

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