Review rev_b20e1c0639554700b62253c889fee79b

{
  "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/crypto/cipher_extra/derive_key.c",
      "hash": "blake3:f3172c3130bbcf7540e308d5c1757ba6936565ce488b1e2fbd71fd4cf0cf1bd4",
      "summary": "Reviewed `EVP_BytesToKey` in `aws-lc/crypto/cipher_extra/derive_key.c`, which derives a key and IV from password material using repeated digest rounds and cleans temporary buffers afterward. I checked for install-time hooks, network or exfiltration behavior, credential harvesting, dynamic code loading, obfuscation, and persistence changes, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/cipher_extra/e_aes_cbc_hmac_sha1.c",
      "hash": "blake3:87488a028e2c56eaba1db7d36fe95a38598b231b49b333fd099c297a1cdd9737",
      "summary": "Reviewed `aws-lc/crypto/cipher_extra/e_aes_cbc_hmac_sha1.c`, which implements the AES-CBC-HMAC-SHA1 TLS cipher path and its AEAD-style control handling. I found no concrete supply-chain or malicious indicators in this file: no install hooks, network or exfiltration logic, credential access, dynamic code loading, obfuscation/packing, persistence, or hidden subprocess execution.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/cipher_extra/e_aes_cbc_hmac_sha256.c",
      "hash": "blake3:44e3042a031a188013475460f9e3b274cce018ec6b6d6ab91410a6831cf15590",
      "summary": "Reviewed the AES-CBC-HMAC-SHA256 stitched TLS cipher implementation, including key setup, record encryption/decryption, MAC verification, padding handling, and constant-time checks. I found no concrete supply-chain indicators in this file: no install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence logic.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}