Review rev_2365ea4e43224b00b33197e4c7802025

{
  "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_shl_small.S",
      "hash": "blake3:36655d2f7fc456d53290be22373f4bc817bb6cc4b812a749ca69509383a3b25c",
      "summary": "Reviewed this x86-64 assembly routine for big-number left shifting and checked for install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence. The file is a straight arithmetic implementation with ABI shims and 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_shr_small.S",
      "hash": "blake3:7fad9d2d150c0b0093c6d249607ab9014dc05469ee937eeed812dde0efcf3bcb",
      "summary": "Reviewed this x86-64 assembly implementation of `bignum_shr_small`, which performs a right shift on big-number limbs and returns the shifted-out bits. I found no concrete indicators of install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence in this target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_sqr.S",
      "hash": "blake3:1d8d285e46a7f43e3cf4db177cb8921e6b5f26de5f043bedbdae857aa6ceef6f",
      "summary": "Reviewed the x86-64 assembly routine in `bignum_sqr.S`, which implements a Montgomery-style big-number squaring loop with ABI setup, register saving, and arithmetic-only inner loops. I found no concrete indicators of install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence tampering in this target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_sub.S",
      "hash": "blake3:1407cf5b6109b410ff001b0b75bef36e9a1365924943bf3ade213c045389c997",
      "summary": "Reviewed `aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_sub.S`, which is a straight x86-64 assembly implementation of multi-precision subtraction with ABI handling and looped word-wise arithmetic. I found no concrete malicious or supply-chain indicators in the target file: no install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence logic.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/word_bytereverse.S",
      "hash": "blake3:80d5b0d50b78f8d0f4662030b2d0e4fab355bbb7e52fe48119b889d458fb5c02",
      "summary": "Reviewed this x86-64 assembly implementation of `word_bytereverse`, which only copies the input register to `rax` and applies `bswapq` before returning. I found no concrete malicious or supply-chain indicators in the target file: no install hooks, network or exfiltration logic, credential access, dynamic code loading, obfuscation, persistence, or hidden subprocess execution.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}