Review rev_ea4d0e9f17644559b73f85045f09661d

{
  "summary": "Reviewed `aws-lc/ssl/tls13_enc.cc`, which implements TLS 1.3 key schedule, traffic secret derivation, PSK binder generation/verification, and ECH confirmation handling via HKDF/HMAC over local transcript state. I found no concrete malicious or supply-chain indicators in this file: no install-time hooks, network or exfiltration behavior, credential harvesting, dynamic code loading, obfuscation, persistence tampering, or other hidden payload execution.\nReviewed `aws-lc/crypto/fipsmodule/rand/ctrdrbg.c`, which implements CTR-DRBG initialization, derivation, reseeding, nonce generation, and output generation using local AES operations and memory cleansing. I checked for install hooks, subprocess execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence; none were present 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/ssl/tls13_enc.cc",
      "hash": "blake3:c64ee3fea1aa69a4379376151526724a05663c7bbce6342013dc4fedd3b279f6",
      "summary": "Reviewed `aws-lc/ssl/tls13_enc.cc`, which implements TLS 1.3 key schedule, traffic secret derivation, PSK binder generation/verification, and ECH confirmation handling via HKDF/HMAC over local transcript state. I found no concrete malicious or supply-chain indicators in this file: no install-time hooks, network or exfiltration behavior, credential harvesting, dynamic code loading, obfuscation, persistence tampering, or other hidden payload execution.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/rand/ctrdrbg.c",
      "hash": "blake3:1c3ca65c4b1d55b2ec804c4411fe7314f463a99037940d514b7eb095d20549c4",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/rand/ctrdrbg.c`, which implements CTR-DRBG initialization, derivation, reseeding, nonce generation, and output generation using local AES operations and memory cleansing. I checked for install hooks, subprocess execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence; none were present in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}