Review rev_b46fa985451b4727a5204b19ce14e336

{
  "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/fastmul/bignum_ksqr_32_64.S",
      "hash": "blake3:1b6a54da03b08ffc4ec8c94bbcb055daad175d674892638b456ea61752603300",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_ksqr_32_64`, which is a Karatsuba-style big-number squaring routine with a local half-size helper and register-save/restore prologue. I found no concrete malicious or supply-chain indicators in this file, and no install hooks, network or exfiltration code, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/fastmul/bignum_mul_4_8.S",
      "hash": "blake3:27a547f5ecca5381ee4e609fbed31c8b61b44759119485d71062f612f7d7c3a7",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_mul_4_8`, which multiplies two 4-limb integers into an 8-limb output using `mulxq`, `adcxq`, and `adoxq` with standard ABI handling and no external calls. I found no concrete indicators of install-time execution, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise behavior in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/fastmul/bignum_mul_4_8_alt.S",
      "hash": "blake3:88b0332e5212e02db721c638bc5d0c76b70b660dccc6b63e1a7de1cad6dd8042",
      "summary": "Reviewed the x86-64 assembly routine that multiplies two 4-limb bignums into an 8-limb output, including the Windows ABI shim, carry-propagation macros, and final stack/CFI directives. I checked 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 in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}