Review rev_5133e80384764b8994a8b308eb45f37b

{
  "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/sha3/sha3_keccak_f1600.S",
      "hash": "blake3:367bc5f88e883a5ed85f29cbe1a8111621cbc5565029c75ebb1949d072c9f684",
      "summary": "Reviewed an ARM assembly implementation of the SHA3 Keccak-f1600 permutation. The file only performs fixed-register state manipulation and round-constant loads/stores, and I found no 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/arm/sha3/sha3_keccak_f1600_alt.S",
      "hash": "blake3:df9fd7570fb379fe5561591aa08f551369ac9dc6acb21ae9a3d38ee06bdd5172",
      "summary": "Reviewed this ARM64 assembly source implementing the Keccak-f1600 permutation used by SHA3. It consists of straight-line state loads, 24 rounds of arithmetic/bitwise transforms, and state stores, with no install hooks, network or exfiltration logic, credential access, dynamic code loading, obfuscation, or persistence behavior present in the target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/sha3/sha3_keccak_f1600_alt2.S",
      "hash": "blake3:4b523b26ad60922508e9c58c36f0e18d254aa7eae17dda593c697c3d30e765c9",
      "summary": "Reviewed the ARM assembly implementation of `sha3_keccak_f1600_alt2`, which is a straight Keccak-f1600/SHA3 permutation over 24 rounds with standard loads, bitwise ops, and stores. I found no concrete indicators of install-time execution, network or 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/arm/sm2/bignum_add_sm2.S",
      "hash": "blake3:1bbe3208cc9a072dc32920d292fc15d54b995642fac835f829ba15f7529285e1",
      "summary": "Reviewed this ARM assembly implementation of SM2 modular addition, which performs a fixed bignum add, subtracts the SM2 modulus, conditionally selects the reduced result, and stores it. I checked for install-time execution, 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_cmul_sm2.S",
      "hash": "blake3:030c0c6de5db24961ce9bbec10665038dd3f156e060bc56cb428b3be1ce445ec",
      "summary": "This file is a hand-written ARM64 assembly implementation of `bignum_cmul_sm2`, multiplying a 4-limb value by a scalar and reducing it modulo the SM2 field prime. I checked for install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence/tampering, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}