Review rev_b8edbb8e69d94747bf373876b0940b7d

{
  "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/x86_att/secp256k1/secp256k1_jmixadd.S",
      "hash": "blake3:27326dfc9d3657c8067b498e4f0b6f7a097aaacbd07dc850eb0fcbddd06f4453",
      "summary": "Reviewed the x86-64 assembly implementation of `secp256k1_jmixadd`, which performs Jacobian mixed-point addition via local field multiply/square/subtract macros and final conditional multiplexing. I checked for install hooks, subprocess 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/s2n-bignum-imported/x86_att/secp256k1/secp256k1_jmixadd_alt.S",
      "hash": "blake3:cd3b3b0da6c7d8319c94176147208153958ea0b53f0a2c2ea67f631d73242a59",
      "summary": "Reviewed the secp256k1 Jacobian mixed-addition assembly in this target file. It is a fixed-purpose field-arithmetic implementation with ABI setup, stack temporaries, and conditional result multiplexing, and I found no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}