Review rev_e9e5bc6c61074014aeaebfb00c3d5932

{
  "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/arm/fastmul/bignum_sqr_4_8_alt.S",
      "hash": "blake3:feeb282aabf51716197f28ef59b4746cba6b9e8e49326e957fd4b24cb26077bf",
      "summary": "This file is a standalone ARM64 assembly routine that computes a 4-limb bignum square and writes the 8-limb result back to the caller-provided buffer. I checked it for install-time hooks, hidden subprocesses, network or credential access, dynamic code loading, obfuscation, persistence tampering, and other supply-chain indicators, and found none.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/fastmul/bignum_sqr_6_12.S",
      "hash": "blake3:3657895e6a57220d0687a4e0eca86eb6d349664312b5d0ca38f6ade837a80c67",
      "summary": "Reviewed the ARM assembly in `bignum_sqr_6_12.S`, which is a hand-optimized 6-limb big-number squaring routine. I checked for install-time hooks, network or credential access, dynamic code loading, obfuscation, persistence, and other hidden execution paths, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/fastmul/bignum_sqr_6_12_alt.S",
      "hash": "blake3:42ac27c197ffab68ba10dac13d95a1e9322162959446b22e01bf2bd86795da50",
      "summary": "Reviewed the ARM64 assembly routine for 6-limb bignum squaring. It is a straight-line arithmetic implementation that loads operands, performs limb multiplications/additions, and stores the 12-limb result; I found no concrete signs of install hooks, network or secret access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/fastmul/bignum_sqr_8_16.S",
      "hash": "blake3:3608fb8eb0110fb7a68433e47e5d6186b8cf3eb8c04f95be8dc8cac3a61ad4b5",
      "summary": "Reviewed the ARM assembly implementation of `bignum_sqr_8_16`, which is a straight-line big-number squaring routine with register saves/restores and final stores back into the output buffer. 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 target file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}