Review rev_26751d6c5d5448479032f3f62f4931a0

{
  "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/x86_att/p521/bignum_montsqr_p521_alt.S",
      "hash": "blake3:22987dbacb5e9ce23024663b297c38c08c0a3f7393dbd1d0824f9226fe15f0a2",
      "summary": "Reviewed the x86-64 assembly in `bignum_montsqr_p521_alt.S`, which implements a fixed Montgomery squaring routine for P-521 and only performs arithmetic, register saves/restores, and stack/local scratch handling. I found no concrete indicators of install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence tampering in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/x86_att/p521/bignum_mul_p521.S",
      "hash": "blake3:c93cff346a131679b3b93d4fdc21d0e62c6fc170d715dd094c7b02575493c630",
      "summary": "This file is a hand-written x86-64 assembly implementation of modular multiplication over p521. I checked it for install-time execution, syscalls/networking, secret access, dynamic code loading, obfuscation, and persistence mechanisms, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/x86_att/p521/bignum_mul_p521_alt.S",
      "hash": "blake3:80d910bf1b71c487dc4138813eeedf89fa969877f73e4870c5290a4c88851bdb",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_mul_p521_alt`, which performs modular multiplication and reduction for p521 using register/stack arithmetic. I checked for install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/x86_att/p521/bignum_neg_p521.S",
      "hash": "blake3:14e77ff489f6831ac1c66ec360b2417926ddb5e1170d6fcc0c9feace6449880f",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_neg_p521`, which performs constant-time modular negation on nine 64-bit limbs, with Windows ABI register shuffling and a GNU-stack note. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence/tampering, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}