Review rev_3e876bcdc614490f87803f83684dc738

{
  "summary": "Reviewed the AES-CBC-HMAC-SHA256 TLS cipher implementation in `aws-lc/crypto/cipher_extra/e_aes_cbc_hmac_sha256.c`. It contains only in-memory key setup, TLS AAD handling, CBC encrypt/decrypt, HMAC computation, padding removal, and constant-time MAC verification; I found no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence.\n`aws-lc/crypto/ecdh_extra/ecdh_test.cc` is a C++ unit-test file for ECDH behavior, exercising curve selection, key construction, Wycheproof vector validation, and group-mismatch checks. I reviewed it for install-time hooks, network/exfiltration, credential or environment access, dynamic code loading, obfuscation, persistence, and other hidden payload execution, and found no concrete malicious or supply-chain indicators.\nReviewed `aws-lc/crypto/fipsmodule/bn/gcd.c`, which implements big-number modular inverse routines and related FIPS-safe helpers using internal OpenSSL/AWS-LC primitives. I checked for install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators, and found none 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/crypto/cipher_extra/e_aes_cbc_hmac_sha256.c",
      "hash": "blake3:44e3042a031a188013475460f9e3b274cce018ec6b6d6ab91410a6831cf15590",
      "summary": "Reviewed the AES-CBC-HMAC-SHA256 TLS cipher implementation in `aws-lc/crypto/cipher_extra/e_aes_cbc_hmac_sha256.c`. It contains only in-memory key setup, TLS AAD handling, CBC encrypt/decrypt, HMAC computation, padding removal, and constant-time MAC verification; I found no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/ecdh_extra/ecdh_test.cc",
      "hash": "blake3:8f3c5e1a797df4c0daf18c7b2c7f297812dd43b50904cabf8f429d318b6210a9",
      "summary": "`aws-lc/crypto/ecdh_extra/ecdh_test.cc` is a C++ unit-test file for ECDH behavior, exercising curve selection, key construction, Wycheproof vector validation, and group-mismatch checks. I reviewed it for install-time hooks, network/exfiltration, credential or environment access, dynamic code loading, obfuscation, persistence, and other hidden payload execution, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/bn/gcd.c",
      "hash": "blake3:474f73b384106486da6048b25d5bea8a4989e07c457eba5ec5ade1144ba957af",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/bn/gcd.c`, which implements big-number modular inverse routines and related FIPS-safe helpers using internal OpenSSL/AWS-LC primitives. I checked for install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators, and found none in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}