Review rev_c27b46409cd7430f92e06c53e11c05f8

{
  "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/arm/fastmul/bignum_mul_4_8.S",
      "hash": "blake3:ffda0ca5da6fb719fed429dc6954dec4af0c91188ae47704a67200a8245a2d9a",
      "summary": "The target file is a hand-written ARM64 assembly routine that multiplies two 4-limb bignums into an 8-limb result using Karatsuba-style arithmetic. I checked it for install-time execution, network or 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/arm/fastmul/bignum_mul_4_8_alt.S",
      "hash": "blake3:e1215da63bb6ce6342b1e209cd5a8f2f37c4e2967c0b8dae283897ad5d649e21",
      "summary": "Reviewed the ARM assembly implementation of `bignum_mul_4_8_alt`, which performs a fixed 4-limb by 4-limb multiplication and writes the 8-limb result back to the caller-provided buffer. I checked this target file for install hooks, subprocess execution, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden payload behavior, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/fastmul/bignum_mul_6_12.S",
      "hash": "blake3:3e33320ab4bbfd356dee195b7e1c79a7feac0b3844054fca2bbfeab576d7a152",
      "summary": "Reviewed this ARM assembly routine as a fixed-size big-number multiply implementation for `bignum_mul_6_12`. The file contains only arithmetic, loads/stores, and register-saving directives; I found no install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence mechanisms.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/fastmul/bignum_mul_6_12_alt.S",
      "hash": "blake3:800aa4d661995d70533544d682f8adb84be5b9b7d2d14e9273e48caee60c6465",
      "summary": "Reviewed the ARM assembly routine for `bignum_mul_6_12_alt`, which performs fixed-size 6-limb by 6-limb multiplication using register arithmetic and normal save/restore prologue/epilogue. I found no concrete indicators of install-time execution, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior in the target file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}