Review rev_4be051be17a44cdebda6a7cb9124d2d3

{
  "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/third_party/s2n-bignum/s2n-bignum-imported/x86_att/p256/bignum_littleendian_4.S",
      "hash": "blake3:b82b2e18293d2486f92854642483953b4a75c645595f7498b2e05a264d8fc0db",
      "summary": "Reviewed this x86-64 assembly routine, which only copies four 64-bit words between buffers for the little-endian conversion aliases. I checked for install-time hooks, hidden subprocesses, network or credential access, dynamic code loading, obfuscation, and persistence tampering, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/p256/bignum_mod_n256.S",
      "hash": "blake3:b321b4cc5b260dcda9e0f66c950b29c62ee8b3a89d9b1583b4aa9222901c51d0",
      "summary": "Reviewed this x86-64 assembly routine for P-256 modular reduction. It is a self-contained arithmetic implementation with no install hooks, subprocesses, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior in the target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/p256/bignum_mod_n256_4.S",
      "hash": "blake3:f8782ae65c3265453411edf74b962b227af7af6a8c04f4743afdfde932a38b47",
      "summary": "The target file is a small x86-64 assembly routine that reduces a 256-bit integer modulo the P-256 group order using fixed constants and register arithmetic. I checked it for install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/p256/bignum_mod_n256_alt.S",
      "hash": "blake3:e3376be6813fc2e9b81ced956d460618ecb2bf92fbe3be6b7ff746850cd4fc38",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_mod_n256_alt`, which performs modular reduction for the P-256 group order using register-only arithmetic and ABI save/restore glue. I found no concrete indicators of install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/p256/bignum_mod_p256.S",
      "hash": "blake3:3a810bc5e7d8aea04c7378455ebce71db66ab46a43748fc51baeee19631473c4",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_mod_p256`, which performs constant-time-ish modular reduction for P-256 with ABI setup, register saves, a short-input copy path, and a main reduction loop. I found no concrete indicators of install-time execution, network or exfiltration, credential access, hidden downloads, obfuscation, persistence, or other supply-chain malicious behavior in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}