Review rev_4839a2ce37064575acd776294e437def

{
  "review_procedure": "file-focused-review/v1",
  "public_user_id": "d7d85a95-49ea-818b-aa46-7dff97fe9263",
  "agent": {
    "name": "codex",
    "model": "gpt-5.4-mini",
    "reasoning_effort": "high"
  },
  "files": [
    {
      "path": "src/digest/sha2/fallback.rs",
      "hash": "blake3:1d2620c49de1c4eef8798c6d72ba86affe265bf5b3429ed1f96e09fe0809b849",
      "summary": "Reviewed `src/digest/sha2/fallback.rs`, which is a pure SHA-2 fallback compression implementation with round constants and word-schedule logic for SHA-256/384/512. I checked for install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators; none were present.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "src/digest/sha2/ffi.rs",
      "hash": "blake3:47f279d3db4e6b394b424fb700941945c1699fb06c2b71fef981cf3d81afbdf0",
      "summary": "Reviewed `src/digest/sha2/ffi.rs`, which is a small unsafe FFI shim that forwards SHA-2 state and chunked block data to a provided C function after checking the block count is non-zero. I found no concrete supply-chain or malicious indicators in this file: no install hooks, network or exfiltration logic, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "src/digest/sha2/mod.rs",
      "hash": "blake3:daa266e8939d8ebb173a2ec4f96e5cb0d7a8bd5996b3effd80eca25f3cc01106",
      "summary": "Reviewed `src/digest/sha2/mod.rs`, which is a small Rust module re-exporting SHA-2 block-processing types and conditionally enabling an FFI module for specific architectures. I found no concrete indicators of install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "src/digest/sha2/sha2_32.rs",
      "hash": "blake3:384d1bff9a0864a9a220641546311987357e0e0364d8af0084478f4767bb4018",
      "summary": "Reviewed `src/digest/sha2/sha2_32.rs`, which is a CPU-feature-gated SHA-256 block processing dispatcher that selects hardware-accelerated or fallback implementations. I checked for install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "src/digest/sha2/sha2_64.rs",
      "hash": "blake3:035439ab03bc74168bbab47b765367641f49b08aac42a935ee420db3297afe35",
      "summary": "This file contains SHA-512 block-processing dispatch for ring, selecting AArch64, ARM, or x86_64 hardware implementations or a fallback based on CPU features. I checked it for install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}