Review rev_f4ad879c9e364e2dac087f3d6a176069

{
  "summary": "Reviewed `aws-lc/crypto/chacha/chacha_test.cc`, which is a deterministic ChaCha20 unit/ABI test file containing fixed test vectors, counters, and comparisons against library outputs. I checked for install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden execution paths, and found no concrete malicious or supply-chain indicators.\nReviewed `aws-lc/crypto/fipsmodule/sha/sha1.c`, which is a SHA-1 digest implementation with FIPS service-indicator bookkeeping and optional hardware-accelerated dispatch. I found no concrete signs of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior in this file.\nReviewed the ARM64 assembly implementation of `bignum_montsqr_p521_alt`, which performs a constant-structure Montgomery square for P-521 using register-only arithmetic and a final store-back. I found no concrete malicious or supply-chain indicators in this file: no install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, or persistence behavior.",
  "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/chacha/chacha_test.cc",
      "hash": "blake3:081605f91e99c0f92bdd9d6bcbf8142127485cf1a343e650f55592a26f898467",
      "summary": "Reviewed `aws-lc/crypto/chacha/chacha_test.cc`, which is a deterministic ChaCha20 unit/ABI test file containing fixed test vectors, counters, and comparisons against library outputs. I checked for install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden execution paths, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/sha/sha1.c",
      "hash": "blake3:7870051efeca815c9b0f09424fd505364d05648b22dae021bd273c45e18552a4",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/sha/sha1.c`, which is a SHA-1 digest implementation with FIPS service-indicator bookkeeping and optional hardware-accelerated dispatch. I found no concrete signs of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/p521/bignum_montsqr_p521_alt.S",
      "hash": "blake3:c911882c8bdce8976ab7609b7666ca8df32910eee2d759bf25926a522e3fe654",
      "summary": "Reviewed the ARM64 assembly implementation of `bignum_montsqr_p521_alt`, which performs a constant-structure Montgomery square for P-521 using register-only arithmetic and a final store-back. I found no concrete malicious or supply-chain indicators in this file: no install hooks, network or exfiltration paths, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}