Review rev_203314572eb0465b8562d85a62b119dc

{
  "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/arm/p384/bignum_sub_p384.S",
      "hash": "blake3:953cbf018d5e2189d546c620c96e5549eafcba7a84f4ff5b8473033d7766b0e6",
      "summary": "Reviewed `aws-lc/third_party/s2n-bignum/arm/p384/bignum_sub_p384.S`, an ARM64 assembly routine that subtracts two 384-bit values modulo the P-384 prime using carry/borrow handling and a conditional mask. I checked for install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence mechanisms, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/arm/p384/bignum_tomont_p384.S",
      "hash": "blake3:cacaf12c1be8a1e5677e84f950c9816f0076fadf58d18991490b42164497b5c6",
      "summary": "Reviewed the ARM64 assembly implementation of `bignum_tomont_p384`, which performs an in-process Montgomery-form conversion for P-384 using fixed arithmetic and stores the result back to the caller-provided buffer. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/arm/p384/bignum_triple_p384.S",
      "hash": "blake3:602d0d09dc849d7033454910513dbeeceda068f7bc52de06232486aa04db61da",
      "summary": "Reviewed the ARM assembly in aws-lc/third_party/s2n-bignum/arm/p384/bignum_triple_p384.S. It is a straight-line modular arithmetic routine for computing (3*x) mod p_384 using register-only loads, arithmetic, and stores; I found no install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}