Review rev_aaa764008caf46b98f5ffbf4ce46e4cc

{
  "summary": "Reviewed the x86-64 assembly implementation of `bignum_mux16`, which performs constant-time selection of one of 16 bignum table entries and writes it to the output buffer. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation/packing, and persistence, and found no concrete malicious or supply-chain indicators in this file.\nReviewed the x86-64 assembly implementation of `bignum_neg_p256`, which performs a constant-time modular negation for P-256 with ABI handling and a normal stack note section. I found no concrete malicious or supply-chain indicators in this file: no install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, or hidden subprocess execution.\nReviewed `aws-lc/crypto/rsa_extra/internal.h`, a C/C++ header that only declares RSA/PSS-related structs, constants, constructors/destructors, and parsing/creation helpers. I checked for install hooks, network or exfiltration behavior, credential access, hidden code loading, obfuscation, and persistence, and found no concrete malicious or supply-chain indicators in this file.\nReviewed `aws-lc/crypto/test/file_test_gtest.cc`, a small GoogleTest helper that wraps in-memory test data in a `LineReader`, drives `FileTest::ReadNext()`, and clears or prints the OpenSSL error queue after each test case. I found no concrete indicators of install hooks, network or exfiltration, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise behavior in this file.\nReviewed the x86-64 assembly implementation of `bignum_optadd`, which conditionally adds big-number limbs based on a mask and returns the carry. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and hidden subprocess execution; none are present in this file.",
  "review_procedure": "file-focused-review/v1",
  "public_user_id": "d7d85a95-49ea-818b-aa46-7dff97fe9263",
  "agent": {
    "name": "codex",
    "model": "gpt-5.4-mini",
    "reasoning_effort": "medium"
  },
  "files": [
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_mux16.S",
      "hash": "blake3:a57c03f76a4d8cdcf2c345b2d17f4bb56b2b8fdb9bced38625d7450deee9d389",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_mux16`, which performs constant-time selection of one of 16 bignum table entries and writes it to the output buffer. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation/packing, 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/s2n-bignum-imported/x86_att/p256/bignum_neg_p256.S",
      "hash": "blake3:70346e3a93c5bf99bb9e46749de73aae19af3473507ce2ff34820d011f888332",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_neg_p256`, which performs a constant-time modular negation for P-256 with ABI handling and a normal stack note section. I found no concrete malicious or supply-chain indicators in this file: no install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, or hidden subprocess execution.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/rsa_extra/internal.h",
      "hash": "blake3:1cffa1df3da7e7f1683ef60707f8ceeebb75d5a1c5314b925626b868471d9c59",
      "summary": "Reviewed `aws-lc/crypto/rsa_extra/internal.h`, a C/C++ header that only declares RSA/PSS-related structs, constants, constructors/destructors, and parsing/creation helpers. I checked for install hooks, network or exfiltration behavior, credential access, hidden code loading, obfuscation, and persistence, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/test/file_test_gtest.cc",
      "hash": "blake3:aad4e7be9306a9f3aee470c5a5c14ee214bd0ecddd205cf40c29a8d58642aaf1",
      "summary": "Reviewed `aws-lc/crypto/test/file_test_gtest.cc`, a small GoogleTest helper that wraps in-memory test data in a `LineReader`, drives `FileTest::ReadNext()`, and clears or prints the OpenSSL error queue after each test case. I found no concrete indicators of install hooks, network or exfiltration, 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/generic/bignum_optadd.S",
      "hash": "blake3:d049381a962c844e6a47833cde0d91c3e882b09241109439f29f65d927d44998",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_optadd`, which conditionally adds big-number limbs based on a mask and returns the carry. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and hidden subprocess execution; none are present in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}