Review rev_dcb4032a54574e1293b6d3fea75fdbce

{
  "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/p384/bignum_montsqr_p384_alt.S",
      "hash": "blake3:c0a84c825d50a610e36ebb17031c6f8d9225a514946813b8d9dd6ce0ccee6dd9",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_montsqr_p384_alt`, which performs a fixed Montgomery squaring and conditional reduction for P-384 using register arithmetic and ABI shims. I checked this file for install-time hooks, subprocess execution, network or exfiltration behavior, credential or environment 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/s2n-bignum-imported/x86_att/p384/bignum_mux_6.S",
      "hash": "blake3:376e2d1e8b66c0003205acf0ec3803a8bde28cd9a9315a1f7c846446b2cda951",
      "summary": "Reviewed `aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/p384/bignum_mux_6.S`, which is a small x86-64 assembly routine that conditionally selects one of two 6-limb big integers into `z` based on whether `p` is zero. I found no concrete indicators of install-time execution, network or credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise behavior in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/p384/bignum_neg_p384.S",
      "hash": "blake3:b17f1d19d7d80db4e759bf753e12648cdfa724abee00bbac244f586c0a049a94",
      "summary": "This target is a small x86-64 assembly routine that computes modular negation for P-384 using constant-time arithmetic and ABI shims. I reviewed it for install hooks, subprocesses, network or exfiltration, 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/p384/bignum_nonzero_6.S",
      "hash": "blake3:ee07e1b4dd1f64c0da641fcdcd1e79595b3b5665d928b07cb85159d67d14b778",
      "summary": "Reviewed an x86-64 assembly helper that OR-reduces six 64-bit limbs and returns 1 or 0 depending on whether the input bignum is nonzero. I checked this file for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, and persistence, and found no concrete supply-chain or malicious indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/p384/bignum_optneg_p384.S",
      "hash": "blake3:9d2bbe94c22a9b7a2774036fa9db8613d497984f0821486905c151cc6c4aca81",
      "summary": "Reviewed this x86-64 assembly routine for P-384 conditional modular negation. It only performs fixed arithmetic on its input buffers and ABI handling, and I found no evidence of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}