Review rev_3891802c27724489991ccf9b838894e3

{
  "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/p521/bignum_montmul_p521_alt.S",
      "hash": "blake3:b5062090c05a5fd82a0a717cd4595abb2d229a8ab24dd7388bf7131e779a3e10",
      "summary": "Reviewed the ARM64 assembly implementation of P-521 Montgomery multiplication in `bignum_montmul_p521_alt.S`. It is a straight-line arithmetic routine with register saves/restores and final stores only; I found no install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, or persistence behavior in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}