sickn33/antigravity-awesome-skills/zeroize-audit

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Detects missing zeroization of sensitive data in source code and identifies zeroization removed by compiler optimizations, with assembly-level analysis, and control-flow verification. Use for auditing C/C++/Rust code handling secrets, keys, passwords, or other sensitive data.

Install

npx vskill@latest install sickn33/antigravity-awesome-skills/zeroize-audit

SKILL.md

Supporting material availability

This catalog copy contains the inline guidance below, but does not include the referenced supporting paths, including tools/, schemas/, configs/, prompts/, workflows/ and references/detection-strategy.md. They are external prerequisites, not bundled files:

Ask for the original supporting material or an existing installation before using a step that depends on these paths; this catalog does not identify a verified download source for them. Resolve each path relative to that installation, inspect its contents, and verify any applicable license and execution prerequisites. Do not run a command or claim a referenced procedure was followed until its required file exists. Do not fabricate the missing scripts or treat an unrelated file with the same name as equivalent. Independent steps fully documented here can proceed within the user’s authorized scope; report any dependent step as unavailable.

⚠️ AUTHORIZED USE ONLY
This skill is for educational purposes or authorized security assessments only.
You must have explicit, written permission from the system owner before using this tool.
Misuse of this tool is illegal and strictly prohibited.
Mandatory confirmation gate
Before running any command that probes, exploits, changes, persists on, extracts data from, or attempts credential access against a target:
1. Ask the user to state the exact target URL, IP, account, or resource.
2. Ask the user to confirm written authorization and the permitted scope.
3. Show the exact command(s) and explain their expected effect.
4. Wait for explicit confirmation in the current conversation.
Without that confirmation, remain read-only and provide defensive guidance only. Prefer a sandbox, disposable VM, or controlled lab.

zeroize-audit — Claude Skill

When to Use

  • Auditing cryptographic implementations (keys, seeds, nonces, secrets)
  • Reviewing authentication systems (passwords, tokens, session data)
  • Analyzing code that handles PII or sensitive credentials
  • Verifying secure cleanup in security-critical codebases
  • Investigating memory safety of sensitive data handling

When NOT to Use

  • General code review without security focus
  • Performance optimization (unless related to secure wiping)
  • Refactoring tasks not related to sensitive data
  • Code without identifiable secrets or sensitive values

Purpose

Detect missing zeroization of sensitive data in source code and identify zeroization that is removed or weakened by compiler optimizations (e.g., dead-store elimination), with mandatory LLVM IR/asm evidence. Capabilities include:

  • Assembly-level analysis for register spills and stack retention
  • Data-flow tracking for secret copies
  • Heap allocator security warnings
  • Semantic IR analysis for loop unrolling and SSA form
  • Control-flow graph analysis for path coverage verification
  • Runtime validation test generation

Scope

  • Read-only against the target codebase (does not modify audited code; writes analysis artifacts to a temporary working directory).
  • Produces a structured report (JSON).
  • Requires valid build context (compile_commands.json) and compilable translation units.
  • "Optimized away" findings only allowed with compiler evidence (IR/asm diff).

Inputs

See {baseDir}/schemas/input.json for the full schema. Key fields:

FieldRequiredDefaultDescription
pathyes—Repo root
compile_dbnonullPath to compile_commands.json for C/C++ analysis. Required if cargo_manifest is not set.
cargo_manifestnonullPath to Cargo.toml for Rust crate analysis. Required if compile_db is not set.
configno—YAML defining heuristics and approved wipes
opt_levelsno["O0","O1","O2"]Optimization levels for IR comparison. O1 is the diagnostic level: if a wipe disappears at O1 it is simple DSE; O2 catches more aggressive eliminations.
languagesno["c","cpp","rust"]Languages to analyze
max_tusno—Limit on translation units processed from compile DB
mcp_modenopreferoff, prefer, or require — controls Serena MCP usage
mcp_required_for_advancednotrueDowngrade SECRET_COPY, MISSING_ON_ERROR_PATH, and NOT_DOMINATING_EXITS to needs_review when MCP is unavailable
mcp_timeout_msno—Timeout budget for MCP semantic queries
poc_categoriesnoall 11 exploitableFinding categories for which to generate PoCs. C/C++ findings: all 11 categories supported. Rust findings: only MISSING_SOURCE_ZEROIZE, SECRET_COPY, and PARTIAL_WIPE are supported; other Rust categories are marked poc_supported=false.
poc_output_dirnogenerated_pocs/Output directory for generated PoCs
enable_asmnotrueEnable assembly emission and analysis (Step 8); produces STACK_RETENTION, REGISTER_SPILL. Auto-disabled if emit_asm.sh is missing.
enable_semantic_irnofalseEnable semantic LLVM IR analysis (Step 9); produces LOOP_UNROLLED_INCOMPLETE
enable_cfgnofalseEnable control-flow graph analysis (Step 10); produces MISSING_ON_ERROR_PATH, NOT_DOMINATING_EXITS
enable_runtime_testsnofalseEnable runtime test harness generation (Step 11)

Prerequisites

Before running, verify the following. Each has a defined failure mode.

C/C++ prerequisites:

PrerequisiteFailure mode if missing
compile_commands.json at compile_db pathFail fast — do not proceed
clang on PATHFail fast — IR/ASM analysis impossible
uvx on PATH (for Serena)If mcp_mode=require: fail. If mcp_mode=prefer: continue without MCP; downgrade affected findings per Confidence Gating rules.
{baseDir}/tools/extract_compile_flags.pyFail fast — cannot extract per-TU flags
{baseDir}/tools/emit_ir.shFail fast — IR analysis impossible
{baseDir}/tools/emit_asm.shWarn and skip assembly findings (STACK_RETENTION, REGISTER_SPILL)
{baseDir}/tools/mcp/check_mcp.shWarn and treat as MCP unavailable
{baseDir}/tools/mcp/normalize_mcp_evidence.pyWarn and use raw MCP output

Rust prerequisites:

PrerequisiteFailure mode if missing
Cargo.toml at cargo_manifest pathFail fast — do not proceed
cargo check passesFail fast — crate must be buildable
cargo +nightly on PATHFail fast — nightly required for MIR and LLVM IR emission
uv on PATHFail fast — required to run Python analysis scripts
{baseDir}/tools/validate_rust_toolchain.shWarn — run preflight manually. Checks all tools, scripts, nightly, and optionally cargo check. Use --json for machine-readable output, --manifest to also validate the crate builds.
{baseDir}/tools/emit_rust_mir.shFail fast — MIR analysis impossible (--opt, --crate, --bin/--lib supported; --out can be file or directory)
{baseDir}/tools/emit_rust_ir.shFail fast — LLVM IR analysis impossible (--opt required; --crate, --bin/--lib supported; --out must be .ll)
{baseDir}/tools/emit_rust_asm.shWarn and skip assembly findings (STACK_RETENTION, REGISTER_SPILL). Supports --opt, --crate, --bin/--lib, --target, --intel-syntax; --out can be .s file or directory.
{baseDir}/tools/diff_rust_mir.shWarn and skip MIR-level optimization comparison. Accepts 2+ MIR files, normalizes, diffs pairwise, and reports first opt level where zeroize/drop-glue patterns disappear.
{baseDir}/tools/scripts/semantic_audit.pyWarn and skip semantic source analysis
{baseDir}/tools/scripts/find_dangerous_apis.pyWarn and skip dangerous API scan
{baseDir}/tools/scripts/check_mir_patterns.pyWarn and skip MIR analysis
{baseDir}/tools/scripts/check_llvm_patterns.pyWarn and skip LLVM IR analysis
{baseDir}/tools/scripts/check_rust_asm.pyWarn and skip Rust assembly analysis (STACK_RETENTION, REGISTER_SPILL, drop-glue checks). Dispatches to check_rust_asm_x86.py (production) or check_rust_asm_aarch64.py (EXPERIMENTAL — AArch64 findings require manual verification).
{baseDir}/tools/scripts/check_rust_asm_x86.pyRequired by check_rust_asm.py for x86-64 analysis; warn and skip if missing
{baseDir}/tools/scripts/check_rust_asm_aarch64.pyRequired by check_rust_asm.py for AArch64 analysis (EXPERIMENTAL); warn and skip if missing

Common prerequisite:

PrerequisiteFailure mode if missing
{baseDir}/tools/generate_poc.pyFail fast — PoC generation is mandatory

Approved Wipe APIs

The following are recognized as valid zeroization. Configure additional entries in {baseDir}/configs/.

C/C++

  • explicit_bzero
  • memset_s
  • SecureZeroMemory
  • OPENSSL_cleanse
  • sodium_memzero
  • Volatile wipe loops (pattern-based; see volatile_wipe_patterns in {baseDir}/configs/default.yaml)
  • In IR: llvm.memset with volatile flag, volatile stores, or non-elidable wipe call

Rust

  • zeroize::Zeroize trait (zeroize() method)
  • Zeroizing<T> wrapper (drop-based)
  • ZeroizeOnDrop derive macro

Finding Capabilities

Findings are grouped by required evidence. Only attempt findings for which the required tooling is available.

Finding IDDescriptionRequiresPoC Support
MISSING_SOURCE_ZEROIZENo zeroization found in sourceSource onlyYes (C/C++ + Rust)
PARTIAL_WIPEIncorrect size or incomplete wipeSource onlyYes (C/C++ + Rust)
NOT_ON_ALL_PATHSZeroization missing on some control-flow paths (heuristic)Source onlyYes (C/C++ only)
SECRET_COPYSensitive data copied without zeroization trackingSource + MCP preferredYes (C/C++ + Rust)
INSECURE_HEAP_ALLOCSecret uses insecure allocator (malloc vs. secure_malloc)Source onlyYes (C/C++ only)
OPTIMIZED_AWAY_ZEROIZECompiler removed zeroizationIR diff required (never source-only)Yes
STACK_RETENTIONStack frame may retain secrets after returnAssembly required (C/C++); LLVM IR alloca+lifetime.end evidence (Rust); assembly corroboration upgrades to confirmedYes (C/C++ only)
REGISTER_SPILLSecrets spilled from registers to stackAssembly required (C/C++); LLVM IR load+call-site evidence (Rust); assembly corroboration upgrades to confirmedYes (C/C++ only)
MISSING_ON_ERROR_PATHError-handling paths lack cleanupCFG or MCP requiredYes
NOT_DOMINATING_EXITSWipe doesn't dominate all exitsCFG or MCP requiredYes
LOOP_UNROLLED_INCOMPLETEUnrolled loop wipe is incompleteSemantic IR requiredYes

Agent Architecture

The analysis pipeline uses 11 agents across 8 phases, invoked by the orchestrator ({baseDir}/prompts/task.md) via Task. Agents write persistent finding files to a shared working directory (/tmp/zeroize-audit-{run_id}/), enabling parallel execution and protecting against context pressure.

This is the start of the file. Read the full SKILL.md on GitHub.

Security

  • Security scanPassed, 95 of 100Pattern checks on the skill's files.
  • Model reviewPassed

Quality evaluation

  • Task evaluationNot runNo evaluation yet. Run one in Skill Studio.

Source

Popularity

Repository stars
22,823
Repository forks
3,932
Repository npm downloads, 7 days
11,772
7-day trend score
72

Stars and forks are for the whole GitHub repository, not this skill alone. Downloads are for the repository's npm package. Refreshed 17 Mar 2026, 7 months ago.

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