Review rev_63d7012cb25946559dae89dc9e76c938

{
  "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": "aws-lc/third_party/s2n-bignum/x86_att/p256/bignum_montinv_p256.S",
      "hash": "blake3:c62ca3513b47e46bc1b49b327f98570e303be7ce08a9ec1595b63d562c20b292",
      "summary": "Reviewed the x86-64 AT&T assembly implementation of `bignum_montinv_p256`, which performs P-256 Montgomery inversion via fixed arithmetic, stack allocation, register saves/restores, and final result reduction/copy-out. I found no concrete supply-chain indicators in this file: there are no install hooks, network or exfiltration calls, credential or secret access, dynamic code loading, obfuscation/deobfuscation pipelines, persistence changes, or other hidden payload execution paths.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}