Review rev_91c793aa70234acda4a8bf0fad7f9e45

{
  "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/word_clz.S",
      "hash": "blake3:cb1ed574dd11f3f1ac028067e8edf520a7a59c20aa68f5f618669d75f5a4d8ba",
      "summary": "Reviewed the x86-64 assembly implementation of `word_clz`, which computes count-leading-zeros with `bsrq`, a zero-input correction, and ABI-specific register handling. I found no concrete indicators of install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence in this target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/word_ctz.S",
      "hash": "blake3:df89caf4912a23e84c09d2084d94130fe5d440ab2fab8087eb1f6b6e5ed3278d",
      "summary": "Reviewed this x86-64 assembly helper for counting trailing zero bits. It contains only a small ABI shim and a `bsfq`/`cmove` implementation, with no install hooks, network or credential access, dynamic code loading, obfuscation, persistence, or other supply-chain indicators in the target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/word_divstep59.S",
      "hash": "blake3:16fe9f73c568e208646c95c8cb82cf28263bee3248eb59e32adbdb74c2729795",
      "summary": "Hand-written x86-64 assembly for the `word_divstep59` arithmetic routine, performing fixed register shuffling and integer/matrix updates only. I checked this file for install hooks, 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/word_max.S",
      "hash": "blake3:6f3b20012e4591f9fb41f7c33bbfdf46075dc2af8c6d2b23bc4f835436f5a257",
      "summary": "Reviewed this x86-64 assembly implementation of `word_max`, which selects the larger of two unsigned 64-bit inputs and returns it. I checked for install-time hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden control flow, and found no concrete malicious or supply-chain indicators in the target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/word_min.S",
      "hash": "blake3:2c1a8fe745230887809ff7d4d52320abffde7aa2d5f010f4440609cde350c4e5",
      "summary": "Reviewed the x86-64 assembly implementation of `word_min`, which conditionally selects the smaller of two 64-bit inputs and includes ABI/CET stack metadata. 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 patterns in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}