Review rev_7cf0456c4cea4c0da2ef9b8ba02dc885

{
  "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/p384/bignum_montsqr_p384_alt.S",
      "hash": "blake3:142f8cead2feee2b4213fce91a66bbb870d3145db6340c3072c966b037d7a73d",
      "summary": "This file is a hand-written ARM64 assembly implementation of P-384 Montgomery squaring for AWS-LC, using fixed register arithmetic, a reduction macro, and a final conditional subtraction to produce the reduced result. I checked for install-time hooks, network or credential access, dynamic code loading, obfuscation, persistence, and other supply-chain behaviors, and found no concrete malicious indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/p384/bignum_mux_6.S",
      "hash": "blake3:6815b8dee9855b916c78d0d709d062a37514418528b2375a6b8fc9847071b2fa",
      "summary": "Reviewed a small ARM assembly routine that performs a 6-limb bignum mux using `csel` and fixed-offset loads/stores. I checked for install-time execution, network or exfiltration, credential access, dynamic code loading, obfuscation, and persistence behavior in this file and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/p384/bignum_neg_p384.S",
      "hash": "blake3:7535d2cf36b2144c9b5904a9430e37fec02d3820b56b441fed1d19116022add6",
      "summary": "This ARM assembly file implements `bignum_neg_p384`, a fixed-purpose P-384 modular negation routine that loads six limbs, conditionally masks the subtraction to avoid producing an unreduced zero, and writes the result back. I checked it for install-time hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, and persistence behavior, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/p384/bignum_nonzero_6.S",
      "hash": "blake3:0feb8ffafbb7d08a017c9d789e26d7aa37e2d5f172184d373a86339623c3c7b4",
      "summary": "Reviewed this ARM assembly routine, which OR-reduces six 64-bit limbs and returns 1 when the 384-bit input is nonzero. I checked for install hooks, 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/s2n-bignum-imported/arm/p384/bignum_optneg_p384.S",
      "hash": "blake3:c4b886d68081049c1ee7ab56116e3a189682cdf13e7cac476ab2c90e0a984c2b",
      "summary": "Reviewed this ARM64 assembly routine that conditionally negates a 384-bit field element and writes the result back to the output buffer. I checked for install-time hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, persistence tampering, and other hidden payload behavior; none are present in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}