Review rev_d29e727f11bd4170ad908c7d2e707c50

{
  "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/bignum_neg_p256k1.S",
      "hash": "blake3:331a351a59af4e57543c93c1140d6030b5f9135c16b16a91d7bf19f403959b11",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_neg_p256k1`, which computes modular negation over secp256k1 with standard and Windows ABI handling. I checked for install hooks, network or credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators; none were present in this target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/secp256k1/bignum_optneg_p256k1.S",
      "hash": "blake3:249c6544d76c201f57dab90ac30d0ad1bfb5fde87ee0db0f9d3276ace3141478",
      "summary": "Reviewed an x86-64 assembly implementation of `bignum_optneg_p256k1`, which conditionally negates a 256-bit value modulo secp256k1 and handles both System V and Windows x64 ABIs. I checked this target for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/secp256k1/bignum_sqr_p256k1.S",
      "hash": "blake3:92ecbb2662375b66831c301db9ce9c88f43b34c23a327e65db4010d27115531a",
      "summary": "`bignum_sqr_p256k1.S` is a hand-written x86-64 assembly routine that computes a secp256k1 modular square and only performs register arithmetic and stack save/restore. I checked it for install-time execution, subprocesses, 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/x86_att/secp256k1/bignum_sqr_p256k1_alt.S",
      "hash": "blake3:665844bc57e6a424b2cf2248cb1574508593de1c0bd534829452e8dce76436db",
      "summary": "The target file is x86-64 assembly implementing `bignum_sqr_p256k1_alt`, a pure modular squaring routine for secp256k1. I checked it for install-time hooks, subprocess execution, network or credential access, dynamic code loading, obfuscation, and persistence, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/secp256k1/bignum_sub_p256k1.S",
      "hash": "blake3:cd6f94700519d8555ee0136949052685ed00e985425e42c9bc19701e6d5c29fc",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_sub_p256k1`, which performs a constant-time modular subtraction for secp256k1 field elements and only contains register arithmetic plus ABI/CFI directives. I found no concrete indicators of install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence in this target file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}