Review rev_85547ee50a114747b683a02b00e0a604

{
  "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/s2n-bignum-imported/x86_att/generic/bignum_modinv.S",
      "hash": "blake3:0c4e7fa2d6a6698b48cb23577302b2e590aa2bd6c952f7b7724d95b2b323871b",
      "summary": "Reviewed `aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_modinv.S`, which is a low-level x86-64 assembly implementation of modular inversion for big integers. I checked for install-time hooks, subprocess spawning, network or secret access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators; none were present in this target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_modoptneg.S",
      "hash": "blake3:9e2ea8a4f50cb6f2d36c92b8601c9cce66685f0bb172142df03ac65c2a89101d",
      "summary": "This file is a hand-written x86-64 assembly routine for conditional modular negation of a big integer, with ABI setup and tight arithmetic loops only. I checked it for install-time execution, subprocess spawning, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence, and found no concrete malicious indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_modsub.S",
      "hash": "blake3:91e7fe10405175c63fd1cb603498797b03356111cb063b80a544aee46ce8908c",
      "summary": "Reviewed the x86-64 assembly implementation of modular subtraction in `bignum_modsub.S`. It appears to be a straight arithmetic routine with ABI shims and no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}