Review rev_493bb60709b645d083b937ff2fbfd5cd

{
  "summary": "Reviewed the ARM64 assembly implementation of `bignum_kmul_32_64`, including its local helper routines and the final stack/return epilogue. It appears to be a self-contained Karatsuba-style big-number multiply with only register arithmetic, stack saves/restores, and local subroutine calls; I found no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, or other hidden payload behavior.",
  "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/s2n-bignum-imported/arm/fastmul/bignum_kmul_32_64.S",
      "hash": "blake3:e316bd6a51a54eb8ff0c03ba0e9166ec20bdf61811f49a34463a5e3b5c1b8ffa",
      "summary": "Reviewed the ARM64 assembly implementation of `bignum_kmul_32_64`, including its local helper routines and the final stack/return epilogue. It appears to be a self-contained Karatsuba-style big-number multiply with only register arithmetic, stack saves/restores, and local subroutine calls; I found no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, or other hidden payload behavior.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}