Review rev_f52123b785d1435083d80c65e30b7d6d

{
  "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/generic/bignum_negmodinv.S",
      "hash": "blake3:a9a7de025adbc2aab5cc3bb8345af5d78fea4ba6c9d23eac447c57e1c785cd3c",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_negmodinv`, which computes the negated modular inverse for big-number limbs. I checked for install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence, and found no concrete supply-chain or malicious indicators in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_nonzero.S",
      "hash": "blake3:bbd7d3df5c9649faca3fa3f5dc62d7a01b25402271ed0eb1339e265d43a48bdc",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_nonzero`, which only reduces an input limb array to a boolean nonzero return value. I checked for install-time hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden payload behavior, and found none in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_normalize.S",
      "hash": "blake3:51409a70708d5d8a6152bbdea3772cb96841c629a73bcdcad3d9f17d6fd45ba1",
      "summary": "This target is a hand-written x86-64 assembly routine for in-place bignum normalization and shift-count return. I checked for install-time hooks, subprocess or network activity, secret access, dynamic code loading, obfuscation, and persistence behavior, 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/generic/bignum_odd.S",
      "hash": "blake3:1384c523c8951657faf1b11dce78b77f9786d813c7ffebd14e1063f857dc47b8",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_odd`, which only shims the ABI, returns 0 when the limb count is zero, and otherwise masks the low bit of the first input word. I checked for install-time hooks, 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/generic/bignum_of_word.S",
      "hash": "blake3:b25d74d297f6ff8c7063415449e92f02543271df0fd2ade8d270e5af3a528604",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_of_word`, which only writes the provided word and zero-fills the remaining digits of the output buffer. I found no concrete indicators of install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence mechanisms in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}