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     new 30f81f6  ASVS audit: 11.3.2.md (redacted)
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commit 30f81f6810889124583776a6c22c919bf4b3d7ac
Author: ASF Tooling Team <ro...@apache.org>
AuthorDate: Sat May 2 16:55:29 2026 +0200

    ASVS audit: 11.3.2.md (redacted)
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+# ASVS 11.3.2 Security Audit Report
+
+## Executive Summary
+
+**Audit Metadata**
+- **Repository:** apache/mahout
+- **Audit Date:** May 02, 2026
+- **Auditor:** Tooling Agents
+- **ASVS Requirement:** 11.3.2 — Verify that only approved ciphers and modes such as AES with GCM are used.
+  - **Level:** 1
+  - **Section:** Encryption Algorithms
+  - **Section Description:** Authenticated encryption algorithms built on AES and CHACHA20 form the backbone of modern cryptographic practice.
+  - **Chapter:** Cryptography
+  - **Control Objective:** The objective of this chapter is to define best practices for the general use of cryptography, as well as to instill a fundamental understanding of cryptographic principles
+- **Files analyzed:** 2 relevant out of 2 total, 0 skipped
+
+**Finding Summary**
+
+| Severity | Count |
+|----------|-------|
+| Critical | 0 |
+| High | 0 |
+| Medium | 0 |
+| Low | 0 |
+| **Total** | **0** |
+
+**Audit Conclusion**
+
+ASVS 11.3.2 requires that only approved ciphers and modes (e.g., AES-GCM) are used. After thorough analysis of the two provided source files, **no cryptographic cipher or mode operations were identified**. The "encoding" in this codebase refers to quantum state encoding (mathematical transformations of classical data into quantum state vectors), not cryptographic encoding. Therefore, there are no unapproved ciphers to flag as violations. However, the domain context raises a legitimate ar [...]
+
+**Status:** PASS (Not Applicable) — No cryptographic operations present in analyzed files.
+
+---
+
+## Security Controls Inventory
+
+### Cryptographic Cipher Controls Found
+
+| Control | Location | Purpose | Coverage Status |
+|---------|----------|---------|-----------------|
+| AES-GCM or other AEAD cipher | Not found in provided files | N/A | **Absent** |
+| Any symmetric cipher | Not found in provided files | N/A | **Absent** |
+| Any asymmetric cipher | Not found in provided files | N/A | **Absent** |
+| Hash function | Not found in provided files | N/A | **Absent** |
+| Key derivation function | Not found in provided files | N/A | **Absent** |
+| HMAC / MAC | Not found in provided files | N/A | **Absent** |
+
+### Operations Classified as Non-Cryptographic
+
+| Operation | Location | Purpose | Coverage Status |
+|-----------|----------|---------|-----------------|
+| `launch_amplitude_encode` | `qdp-kernels/src/lib.rs:62` | Mathematical: normalizes data vector into quantum amplitudes | Non-cryptographic |
+| `launch_angle_encode` | `qdp-kernels/src/lib.rs:218` | Mathematical: maps angles to Ry rotation gates | Non-cryptographic |
+| `launch_basis_encode` | `qdp-kernels/src/lib.rs:199` | Mathematical: maps integer index to computational basis state | Non-cryptographic |
+| `launch_iqp_encode` | `qdp-kernels/src/lib.rs:253` | Mathematical: IQP circuit state preparation | Non-cryptographic |
+| `launch_phase_encode` | `qdp-kernels/src/lib.rs:274` | Mathematical: applies phase rotations | Non-cryptographic |
+| `launch_l2_norm` | `qdp-kernels/src/lib.rs:121` | Mathematical: L2 norm reduction | Non-cryptographic |
+| `convert_state_to_float` / `convert_state_to_double` | `qdp-kernels/src/lib.rs:163,175` | Type conversion: precision changes | Non-cryptographic |
+
+---
+
+## Critical File Review
+
+### File: `qdp/qdp-core/src/encoding/mod.rs`
+
+| Line(s) | Function/Code Element | Security-Sensitive Operation | Crypto Relevance | Review Finding |
+|---------|----------------------|------------------------------|-------------------|----------------|
+| 143 | `ParquetBlockReader::new(path, None, NullHandling::FillZero)` | File I/O without encryption | File I/O without encryption | Non-cryptographic (see Architecture Observations) |
+| 298 | `total_state_vector.to_dlpack()` | State export without authenticated encryption | State export without authenticated encryption | See Architecture Observation 1 |
+| 153-158 | `engine.device.alloc::<f64>(STAGE_SIZE_ELEMENTS)` | GPU memory allocation | GPU memory allocation | No cryptographic material involved |
+| 245-283 | Unsafe block with pointer arithmetic | Raw memory operations | Raw memory operations | No cipher operations in scope |
+| 32-62 | `CleanupGuard` struct | Resource cleanup (RAII pattern) | N/A | Positive security pattern |
+| 253-272 | Buffer offset calculations | Integer overflow protection | N/A | Uses `checked_mul` and `checked_add` correctly |
+| 180, 232-237 | Sample size validation | Input validation | N/A | Prevents misaligned buffer access |
+| 306-317 | `encode_from_parquet` method whitelist | Encoding method validation | N/A | Explicit error for invalid methods |
+
+### File: `qdp/qdp-kernels/src/lib.rs`
+
+| Line(s) | Function/Code Element | Security-Sensitive Operation | Crypto Relevance | Review Finding |
+|---------|----------------------|------------------------------|-------------------|----------------|
+| 42-308 | All `launch_*` FFI declarations | GPU compute kernels for quantum math | None — GPU compute kernels | No ciphers used |
+| 240-248 | `launch_check_finite_batch_f32` | Input validation (NaN/Inf check) | Input validation | Not a cryptographic operation |
+| 312-536 | Stub implementations returning `999` | Fallback for non-CUDA platforms | Fallback for non-CUDA platforms | No ciphers used; proper error handling |
+| 62 | `launch_amplitude_encode` | Quantum amplitude encoding | Mathematical transformation | Non-cryptographic |
+| 218 | `launch_angle_encode` | Quantum angle encoding | Mathematical transformation | Non-cryptographic |
+| 199 | `launch_basis_encode` | Quantum basis encoding | Mathematical transformation | Non-cryptographic |
+| 253 | `launch_iqp_encode` | IQP circuit encoding | Mathematical transformation | Non-cryptographic |
+| 274 | `launch_phase_encode` | Quantum phase encoding | Mathematical transformation | Non-cryptographic |
+
+---
+
+## Findings
+
+### Summary
+
+After comprehensive analysis, **zero instances of unapproved cipher or mode usage were identified** in the provided source files. This is because neither file performs any cryptographic operations.
+
+### Detailed Analysis
+
+All "encoding" operations identified are quantum-mechanical transformations, not cryptographic operations:
+
+- **Amplitude encoding** (`qdp-kernels/src/lib.rs:62`): Maps a normalized classical vector to quantum state amplitudes (L2 normalization + coefficient assignment)
+- **Angle encoding** (`qdp-kernels/src/lib.rs:218`): Maps classical values to rotation angles for Ry gates (trigonometric operations)
+- **Basis encoding** (`qdp-kernels/src/lib.rs:199`): Maps integer indices to computational basis states (one-hot encoding)
+- **IQP encoding** (`qdp-kernels/src/lib.rs:253`): Implements Instantaneous Quantum Polynomial circuits
+- **Phase encoding** (`qdp-kernels/src/lib.rs:274`): Applies phase rotations to quantum states
+
+None of these involve symmetric/asymmetric encryption, hashing, MACs, or key derivation functions as defined in ASVS 11.3.2.
+
+---
+
+## Positive Security Patterns
+
+### 1. Integer Overflow Protection
+
+**Location:** `qdp/qdp-core/src/encoding/mod.rs:253-272`
+
+**Implementation:** `checked_mul` and `checked_add` are correctly used for all buffer offset calculations, preventing memory corruption from arithmetic overflow.
+
+**Security Value:** Prevents integer overflow vulnerabilities that could lead to buffer overflows or memory corruption.
+
+### 2. RAII Cleanup Guard
+
+**Location:** `qdp/qdp-core/src/encoding/mod.rs:32-62`
+
+**Implementation:** The `CleanupGuard` struct ensures GPU synchronization and IO thread cleanup even on early error returns.
+
+**Security Value:** Solid resource safety pattern that prevents resource leaks and ensures proper cleanup in error conditions.
+
+### 3. Input Validation Pipeline
+
+**Location:** `qdp/qdp-core/src/encoding/mod.rs:180, 232-237`
+
+**Implementation:** Sample size validation via `encoder.validate_sample_size()` and chunk-length-modulo-sample-size checks.
+
+**Security Value:** Prevents misaligned buffer access and ensures data integrity throughout the processing pipeline.
+
+### 4. Encoding Method Whitelist
+
+**Location:** `qdp/qdp-core/src/encoding/mod.rs:306-317`
+
+**Implementation:** `encode_from_parquet` only accepts `"amplitude"`, `"angle"`, and `"basis"` — all other values produce an explicit error.
+
+**Security Value:** Prevents undefined behavior by explicitly rejecting invalid encoding methods rather than failing silently.
+
+### 5. Stub Implementations for Unsupported Platforms
+
+**Location:** `qdp/qdp-kernels/src/lib.rs:312+`
+
+**Implementation:** Non-CUDA builds return error code `999` rather than silently succeeding.
+
+**Security Value:** Prevents false success in degraded environments, ensuring failures are detected and handled appropriately.
+
+### 6. Bounded Channel for IO
+
+**Location:** `qdp/qdp-core/src/encoding/mod.rs:162`
+
+**Implementation:** `sync_channel(2)` bounds the IO pipeline to 2 buffers.
+
+**Security Value:** Prevents unbounded memory growth from fast producers, protecting against resource exhaustion attacks.
+
+---
+
+## Architecture Observations
+
+### Observation 1: Quantum State Export Without Integrity Protection
+
+**Location:** `qdp/qdp-core/src/encoding/mod.rs:298`
+
+**Code:**
+```rust
+let dlpack_ptr = total_state_vector.to_dlpack();
+Ok(dlpack_ptr)
+```
+
+**Context:** The domain context explicitly notes: *"No authenticated encryption is used for quantum state serialization, allowing tampering with saved quantum states."*
+
+**Analysis:** The DLPack export provides a raw tensor pointer with no integrity protection (HMAC/signature) or confidentiality (encryption). If these quantum states are serialized to disk or transmitted, they could be tampered with without detection.
+
+**ASVS 11.3.2 Assessment:** This is **not a violation of ASVS 11.3.2** (which concerns cipher/mode selection when cryptography is used, not cipher absence). However, it is relevant architectural context. Per the false positive patterns, "Lack of encryption for data at rest ... is intentional because this is a computational library." However, the domain context distinguishes quantum state serialization from general Parquet files, suggesting this may warrant separate consideration if state [...]
+
+**Risk Level:** Informational (becomes relevant if state persistence features are added)
+
+### Observation 2: No Cryptographic Inventory
+
+**Context:** The domain context notes: *"No explicit cryptographic inventory exists, and no crypto agility is implemented."*
+
+**Analysis:** While the provided files don't use cryptography directly, any future addition of cryptographic functions to this codebase would benefit from a centralized crypto module with algorithm selection guided by an approved algorithm list, ensuring ASVS 11.3.2 compliance from the start.
+
+**Risk Level:** Informational (proactive measure for future development)
+
+---
+
+## Recommendations Summary
+
+### Immediate Actions (Proactive)
+
+| Priority | Recommendation | Rationale | Effort |
+|----------|---------------|-----------|--------|
+| 1 | Create a `crypto` module with approved algorithm constants (e.g., `AES_256_GCM`, `CHACHA20_POLY1305`) if/when cryptographic operations are added | Prevents future cipher sprawl and ensures 11.3.2 compliance from the start | Low |
+| 2 | Document in the project security policy that this codebase currently contains no cryptographic operations | Maintains accurate cryptographic inventory and sets expectations for future development | Low |
+
+### Short-term Actions (If Serialization Added)
+
+| Priority | Recommendation | Rationale | Effort |
+|----------|---------------|-----------|--------|
+| 1 | If quantum state serialization is added, use `AES-256-GCM` or `ChaCha20-Poly1305` via a well-vetted library (e.g., `ring`, `aead` crate) | Addresses domain context concern about state tampering and provides both confidentiality and integrity | Medium |
+
+### Long-term Actions (Governance)
+
+| Priority | Recommendation | Rationale | Effort |
+|----------|---------------|-----------|--------|
+| 1 | Establish a review gate for any PR introducing crypto dependencies | Ensures all future cryptographic operations are reviewed for ASVS 11.3.2 compliance | Low |
+| 2 | Create a cryptographic inventory document as part of security documentation | Facilitates ongoing compliance monitoring and security audits | Low |
+
+---
+
+## Appendix: Files Analyzed
+
+<details>
+<summary>Click to expand list of analyzed files (2 files)</summary>
+
+### Relevant Files (2)
+
+1. **`qdp/qdp-core/src/encoding/mod.rs`** (relevance: 10/10)
+   - Primary encoding orchestration logic
+   - Parquet file I/O operations
+   - DLPack state export functionality
+   - GPU memory management and synchronization
+
+2. **`qdp/qdp-kernels/src/lib.rs`** (relevance: 10/10)
+   - FFI declarations for GPU kernel operations
+   - All quantum encoding kernel interfaces
+   - Platform-specific stub implementations
+   - Input validation kernels
+
+### Skipped Files (0)
+
+None.
+
+</details>
+
+---
+
+**End of Report**
\ No newline at end of file


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