Review rev_5a951224a8fc440d8d9033786b8ca005

{
  "summary": "Reviewed the ARM assembly implementation of the SHA3 Keccak-f1600 permutation. It only manipulates the provided state and round-constant inputs, then writes the transformed state back; I found no install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence tampering.\nReviewed `aws-lc/crypto/fipsmodule/kdf/sskdf.c`, which implements the FIPS SSKDF digest and HMAC variants with bounded input lengths, iterative key material generation, and cleanup/zeroization of temporary buffers. I found no concrete malicious or supply-chain indicators in this file: there are no install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, or persistence behavior.\nReviewed `aws-lc/crypto/fipsmodule/ec/oct.c`, which implements elliptic-curve point octet encoding/decoding and compressed-coordinate recovery for AWS-LC. I checked for install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, persistence, and hidden subprocess execution, and found no concrete malicious or supply-chain indicators in this file.",
  "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/sha3/sha3_keccak_f1600.S",
      "hash": "blake3:367bc5f88e883a5ed85f29cbe1a8111621cbc5565029c75ebb1949d072c9f684",
      "summary": "Reviewed the ARM assembly implementation of the SHA3 Keccak-f1600 permutation. It only manipulates the provided state and round-constant inputs, then writes the transformed state back; I found no install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence tampering.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/kdf/sskdf.c",
      "hash": "blake3:6573141f50414f0abb4b6ec4fd93ea6ffb89ebf04cb022138ae32746377aed56",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/kdf/sskdf.c`, which implements the FIPS SSKDF digest and HMAC variants with bounded input lengths, iterative key material generation, and cleanup/zeroization of temporary buffers. I found no concrete malicious or supply-chain indicators in this file: there are no install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/ec/oct.c",
      "hash": "blake3:912f0ba9fc5a6d27d122a0e0da1b0e1e5418cfd4dbd572500e5dd4d18bfb5ca0",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/ec/oct.c`, which implements elliptic-curve point octet encoding/decoding and compressed-coordinate recovery for AWS-LC. I checked for install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, persistence, and hidden subprocess execution, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}