Review rev_812f64dff3c74ae9a38c724bc5fc0a55

{
  "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/sm2/bignum_mod_nsm2.S",
      "hash": "blake3:9bc8e7981b116c7afad099925a35d11877e6115a2f33c9de17d2ba865c998a0e",
      "summary": "Reviewed this hand-written x86-64 assembly routine for SM2 modular reduction. It contains only fixed arithmetic and register/stack management, with no install hooks, network or exfiltration logic, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/sm2/bignum_mod_nsm2_4.S",
      "hash": "blake3:d0fc5a03bd8d2f6db5de1325c54f6cb1ea8d9134da21637d0ff352fedc5f4b8f",
      "summary": "Reviewed this x86-64 assembly helper for SM2 modular reduction. It only loads fixed constants, processes a 4-limb input, and writes the reduced result; I found no install hooks, network or exfiltration code, credential access, dynamic code loading, obfuscation, or persistence behavior in the target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/sm2/bignum_mod_nsm2_alt.S",
      "hash": "blake3:368d9605db6651cfb639a90c85e57cea2ed6d6d8e8661f4bfce874a643286668",
      "summary": "Reviewed the hand-written x86-64 assembly implementation of SM2 modular reduction in `bignum_mod_nsm2_alt.S`. It contains only arithmetic, ABI shims, and register save/restore paths; I found no concrete indicators of install-time execution, network or credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise behavior.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/sm2/bignum_mod_sm2.S",
      "hash": "blake3:18101c216c0fe4eb2aaf89ac4539d269c9be889a0f4aae186f8470fd89c18c31",
      "summary": "Reviewed this x86-64 assembly routine for SM2 modular reduction. It is a straight arithmetic implementation with register save/restore, conditional subtraction, and a fixed writeback path; I found no concrete malicious or supply-chain indicators such as install hooks, network/exfiltration, 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/sm2/bignum_mod_sm2_4.S",
      "hash": "blake3:233e96142a6481e036a4a4393b3c37181b0ef6e325d6f98b24df90fbd75fa46c",
      "summary": "Reviewed the x86-64 assembly routine in `aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/sm2/bignum_mod_sm2_4.S`, which implements a constant-time modular reduction for SM2 field elements and only contains arithmetic, ABI setup, and stack-marking directives. I found no concrete indicators of install-time execution, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence in the target file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}