Review rev_b2dae4020b934a3c8d26ae52a828b03c

{
  "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/x86_att/curve25519/edwards25519_decode_alt.S",
      "hash": "blake3:bb192298c771fe7f0bfda6c4f69096891c122fc0b1dc67a17b69882993fece6d",
      "summary": "Reviewed the x86-64 assembly in `aws-lc/third_party/s2n-bignum/x86_att/curve25519/edwards25519_decode_alt.S`, which implements Edwards25519 point decoding plus local finite-field arithmetic helpers. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence/tampering, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/x86_att/curve25519/edwards25519_encode.S",
      "hash": "blake3:b7b079171507dc0e51a725e947d2342caa228f92996549337257f09c799ad496",
      "summary": "Reviewed `edwards25519_encode.S`, an x86-64 assembly routine that serializes an edwards25519 point into 32 compressed bytes by copying the 255-bit `y` value and folding the low bit of `x` into the top bit of the last word. I found no concrete malicious or supply-chain indicators in this file: no install-time hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, persistence, or hidden subprocess execution.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}