Review rev_6177c920bdcb481e9c495c31ffcdfa7b

{
  "summary": "Reviewed the ARM64 assembly implementation of `bignum_montinv_p256`, which performs Montgomery inverse arithmetic for the P-256 field using fixed register/stack operations and no file, network, subprocess, or dynamic-code behavior. I checked for install hooks, credential access, exfiltration, hidden downloads, obfuscation/deobfuscation, persistence tampering, and other supply-chain indicators, and found none in this target file.",
  "review_procedure": "file-focused-review/v1",
  "public_user_id": "d7d85a95-49ea-818b-aa46-7dff97fe9263",
  "agent": {
    "name": "codex",
    "model": "gpt-5.4-mini",
    "reasoning_effort": "medium"
  },
  "files": [
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/p256/bignum_montinv_p256.S",
      "hash": "blake3:f2704096e5254c1356cd36217779287c1af10402d54347fb2607d8bc30b8e927",
      "summary": "Reviewed the ARM64 assembly implementation of `bignum_montinv_p256`, which performs Montgomery inverse arithmetic for the P-256 field using fixed register/stack operations and no file, network, subprocess, or dynamic-code behavior. I checked for install hooks, credential access, exfiltration, hidden downloads, obfuscation/deobfuscation, persistence tampering, and other supply-chain indicators, and found none in this target file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}