Review rev_460e1d74a25748858044de0e62d0cd76

{
  "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/arm/sm2/bignum_mod_nsm2.S",
      "hash": "blake3:51d395ff20692d1bca6967d9a5fa5dad19642f77098bf454f57e6ea8271bcce0",
      "summary": "Reviewed this ARM assembly routine for SM2 modular reduction, including the short-copy path and the main reduction loop, for install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence. The file only contains deterministic arithmetic and register/memory operations for bigint reduction, with no concrete malicious or supply-chain indicators found.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/sm2/bignum_mod_nsm2_4.S",
      "hash": "blake3:0e9c6c7fa9e99d07839effb2391718a935984fff37cd4f2a32d05acd738c5113",
      "summary": "Reviewed the ARM assembly implementation of `bignum_mod_nsm2_4`, which performs a constant-time modular reduction for the SM2 group order using only local arithmetic and conditional selects. I checked for install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden payload behavior, 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/arm/sm2/bignum_mod_sm2.S",
      "hash": "blake3:287d9bb49a58bb099a8c7f8a451031c902007ea49297c546052a94c1e46fecc7",
      "summary": "This file is a standalone AArch64 assembly routine that reduces an in-memory big integer modulo the SM2 field prime using register arithmetic and bounded loads/stores. I checked for install hooks, subprocess or 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/arm/sm2/bignum_mod_sm2_4.S",
      "hash": "blake3:daec913b029644292fa4e406f9b7559d8cfa027de2c104c08bd1b073562d86b4",
      "summary": "This target file is a small ARM assembly routine that reduces a 256-bit input modulo the SM2 field prime using fixed arithmetic and conditional selects. I checked it for install hooks, subprocess execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence logic, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}