Review rev_ecbc9976ffa641d484b90f99c95a7464

{
  "summary": "Reviewed the ARM assembly implementation of `curve25519_x25519_alt`, which performs constant-time X25519 field arithmetic, Montgomery ladder steps, and modular inversion entirely in-register/stack with no install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, or persistence behavior visible in the file.",
  "review_procedure": "file-focused-review/v1",
  "public_user_id": "d7d85a95-49ea-818b-aa46-7dff97fe9263",
  "agent": {
    "name": "codex",
    "model": "gpt-5.4-mini",
    "reasoning_effort": "medium"
  },
  "files": [
    {
      "path": "aws-lc/third_party/s2n-bignum/arm/curve25519/curve25519_x25519_alt.S",
      "hash": "blake3:cd672fe19e0f825f7ce56d09623b21aaba6154ef90a3f7c8092a55f17fd2f444",
      "summary": "Reviewed the ARM assembly implementation of `curve25519_x25519_alt`, which performs constant-time X25519 field arithmetic, Montgomery ladder steps, and modular inversion entirely in-register/stack with no install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, or persistence behavior visible in the file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}