Review rev_33ddc00820fa4cb8838696f52044875e

{
  "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/fastmul/bignum_mul_6_12.S",
      "hash": "blake3:9b772a85e05e80aa85ef0d2afcd8eef862189833c45e7a077a4f34df9420e548",
      "summary": "Reviewed the x86-64 assembly routine `bignum_mul_6_12`, which implements a fixed-size 6-limb by 6-limb big-number multiply using `mulxq`, `adcxq`, and `adoxq` with ABI-specific register setup. I found no concrete indicators of install-time execution, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain malicious behavior in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/fastmul/bignum_mul_6_12_alt.S",
      "hash": "blake3:22843c8f4510caa676ac1f89e6117d1d273d0bf523e0bb08738e8f0ce7354854",
      "summary": "Hand-written x86-64 assembly for `bignum_mul_6_12_alt`, implementing a 6-limb by 6-limb multiplication into a 12-limb output buffer. I checked this target for install-time hooks, subprocesses, network/exfiltration, credential 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/fastmul/bignum_mul_8_16.S",
      "hash": "blake3:527b26715cdde6dd6693c2d51c16ff711082c950a37d6131233a41f81f8b3ee2",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_mul_8_16`, which is a straight-line multi-precision multiply routine using BMI2/ADCX/ADOX and ABI save/restore logic. I found no concrete indicators of install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/fastmul/bignum_mul_8_16_alt.S",
      "hash": "blake3:f7e0d90f97889105809fae0c6ae67b51655d7a0f683aaea421a3dc05b57ff442",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_mul_8_16_alt`, which is a straight-line 8x8 limb multiplication routine with ABI setup and constant-offset stores. I found no concrete indicators of install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise signals in this target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/fastmul/bignum_sqr_4_8.S",
      "hash": "blake3:a2ab019aa157a79cc93efde7822089255eef6d27f3dcd114fb13a555b27202e5",
      "summary": "Reviewed this x86-64 assembly implementation of `bignum_sqr_4_8`, which performs a fixed 4-limb square into 8 limbs using integer multiply-and-add instructions and ABI save/restore logic. I checked for install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden control transfers, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}