Review rev_fcb9298c691a44bf82b74b30e57fed49

{
  "summary": "Reviewed the x86-64 assembly implementation of `bignum_cdiv`, which performs word- and limb-level big-number division/modulo with ABI setup and arithmetic loops only. I found no concrete indicators of install-time execution, network or exfiltration, credential access, dynamic code loading, obfuscation/deobfuscation, persistence tampering, or other supply-chain payload behavior in this file.\nReviewed `aws-lc/crypto/fipsmodule/kem/kem.c`, which implements ML-KEM/OID tables plus KEM key wrappers for deterministic key generation, encapsulation, and decapsulation. I checked for install-time hooks, hidden subprocess execution, network or exfiltration paths, credential access, dynamic code loading, obfuscation, and persistence behavior, and found no concrete malicious or supply-chain indicators in this file.\nReviewed this ARM64 assembly implementation of `bignum_mul_p25519`, which performs in-place Curve25519 field multiplication and reduction with fixed arithmetic operations. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and other hidden payload indicators, and found no concrete malicious or supply-chain compromise signals 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/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_cdiv.S",
      "hash": "blake3:a9feaf0c090432d03e65624098e5181cc5f6e262e0accb40f16e79407ea1c7a3",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_cdiv`, which performs word- and limb-level big-number division/modulo with ABI setup and arithmetic loops only. I found no concrete indicators of install-time execution, network or exfiltration, credential access, dynamic code loading, obfuscation/deobfuscation, persistence tampering, or other supply-chain payload behavior in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/kem/kem.c",
      "hash": "blake3:f3fe5205d4acd9508e98f3e524a5b40f45ecae02788c2967501a983f22191c64",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/kem/kem.c`, which implements ML-KEM/OID tables plus KEM key wrappers for deterministic key generation, encapsulation, and decapsulation. I checked for install-time hooks, hidden subprocess execution, network or exfiltration paths, credential access, dynamic code loading, obfuscation, and persistence behavior, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/curve25519/bignum_mul_p25519.S",
      "hash": "blake3:c8e2ab8ec32c323d9e2e5655679ffc2bbd940d0a60bb8206f5dc443138054470",
      "summary": "Reviewed this ARM64 assembly implementation of `bignum_mul_p25519`, which performs in-place Curve25519 field multiplication and reduction with fixed arithmetic operations. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and other hidden payload indicators, and found no concrete malicious or supply-chain compromise signals in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}