Review rev_d4a6c49f53454a3ea36235816de95639

{
  "summary": "Reviewed this x86-64 assembly routine for modular subtraction over p_521. It contains only straight-line register arithmetic and ABI save/restore code; I found no install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence logic in the target file.\nReviewed aarch64 Linux CPU capability initialization in `OPENSSL_cpuid_setup`, including `getauxval` feature checks, the guarded `MIDR_EL1` probe, and the optional `OPENSSL_armcap` environment override. I found no concrete indicators of install-time execution, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior in this file.\nReviewed `aws-lc/crypto/fipsmodule/ml_dsa/mldsa_native_config.h`, which is a build-time configuration header wiring ML-DSA native code into AWS-LC primitives for capability checks, zeroization, randomness, and FIPS/test toggles. I found no concrete signs of install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, or hidden payload execution in this file.\nReviewed `aws-lc/crypto/fipsmodule/sha/sha_test.cc`, a small GoogleTest C++ unit test that exercises SHA1/SHA256/SHA512 ABI checks against internal block-processing functions under compile-time feature guards. 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 patterns in this file.\nReviewed the x86-64 assembly routine for secp256k1 Montgomery conversion in this target file. It contains only deterministic big-number arithmetic and ABI save/restore logic, with no install-time hooks, network or exfiltration code, credential access, dynamic code loading, obfuscation, or persistence behavior.",
  "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/p521/bignum_sub_p521.S",
      "hash": "blake3:0ba35c00d798cf9be1a9755aee2e47ed11c4f726f30102aaf912fde0e507b76e",
      "summary": "Reviewed this x86-64 assembly routine for modular subtraction over p_521. It contains only straight-line register arithmetic and ABI save/restore code; I found no install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence logic in the target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/cpucap/cpu_aarch64_linux.c",
      "hash": "blake3:ddf5bf89dde7639e0edb7c54360540d89a5d9009c22ab2c7195816e2093cb69c",
      "summary": "Reviewed aarch64 Linux CPU capability initialization in `OPENSSL_cpuid_setup`, including `getauxval` feature checks, the guarded `MIDR_EL1` probe, and the optional `OPENSSL_armcap` environment override. I found no concrete indicators of install-time execution, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/ml_dsa/mldsa_native_config.h",
      "hash": "blake3:fea29294c37ecd869404550d2794340a26cf27c3f0ef989294db591145eba68f",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/ml_dsa/mldsa_native_config.h`, which is a build-time configuration header wiring ML-DSA native code into AWS-LC primitives for capability checks, zeroization, randomness, and FIPS/test toggles. I found no concrete signs of install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, or hidden payload execution in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/sha/sha_test.cc",
      "hash": "blake3:2cc67f40bd14eca9b7bcefeb964ed88629bdd76537b1c8bfaec8a00446570acc",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/sha/sha_test.cc`, a small GoogleTest C++ unit test that exercises SHA1/SHA256/SHA512 ABI checks against internal block-processing functions under compile-time feature guards. 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 patterns in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/x86_att/secp256k1/bignum_tomont_p256k1_alt.S",
      "hash": "blake3:0449470eefda469ed62d3b8f91ae751dabefaabd4fadbc2b53a8bc89984c72c9",
      "summary": "Reviewed the x86-64 assembly routine for secp256k1 Montgomery conversion in this target file. It contains only deterministic big-number arithmetic and ABI save/restore logic, with no install-time hooks, network or exfiltration code, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}