Review rev_81412b88750c4346aa93336c27b02705

{
  "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_optadd.S",
      "hash": "blake3:d049381a962c844e6a47833cde0d91c3e882b09241109439f29f65d927d44998",
      "summary": "Reviewed an x86-64 assembly implementation of `bignum_optadd`, which conditionally adds or copies big-number limbs based on a mask and returns the carry. I checked for install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators; none were present in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_optneg.S",
      "hash": "blake3:f442544af727fe749833990802b9bd88ebaee26f041185036b20195cc6f5a399",
      "summary": "Reviewed this x86-64 assembly routine for optional big-number negation and ABI shims. It only performs local arithmetic and register/loop control; I found no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence in the target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_optsub.S",
      "hash": "blake3:2e4eb43fd92fd8f098b422e1bdd12e5f05734d7c68a646ff9f60761c31e1110f",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_optsub`, which conditionally subtracts one big integer from another using register-only arithmetic and ABI shims. I checked for install-time hooks, subprocesses, network or credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators; none were present in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_optsubadd.S",
      "hash": "blake3:378bdbab2b2170f5142884afbab9f1029567ca1a37e78d8a854ea981804b98ea",
      "summary": "Reviewed this x86-64 assembly routine, which implements a branch-light optional big-number add/subtract based on the sign of `p`. I checked the file for install-time hooks, network or secret access, dynamic code loading, obfuscation, persistence, and other supply-chain compromise indicators, and found none.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_pow2.S",
      "hash": "blake3:afb7831b9f266c63f7e7880bfd964685dbc58abcb11928ab1a46532221901ea7",
      "summary": "Assembly implementation of `bignum_pow2` that writes a single power-of-two limb into an output bignum buffer using a constant-time loop. I checked this target for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence, and found no concrete malicious indicators.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}