Review rev_819765914c8e4ed9b979a3e545994d63

{
  "summary": "The target file is a small C header that parses ARM Linux `/proc/cpuinfo` feature strings and maps them to HWCAP2 feature bits for cpu capability detection. I checked it for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and hidden subprocess execution, and found no concrete malicious or supply-chain indicators.\nReviewed `aws-lc/crypto/fipsmodule/ml_kem/mlkem/cbmc.h`, which is a CBMC contract-macro header for the ML-KEM code path. I checked for install-time hooks, network or credential access, dynamic code loading, obfuscation/decoding, persistence, and other hidden execution paths, and found no concrete malicious or supply-chain indicators in this file.\nReviewed `aws-lc/crypto/fipsmodule/ml_kem/mlkem/native/aarch64/src/aarch64_zetas.c`, which is an auto-generated AArch64 C source file containing only static zeta-value tables for forward and inverse NTT operations plus a compile-time empty-unit fallback. I found no concrete indicators of install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation/deobfuscation, persistence, or other supply-chain compromise in this target file.\nReviewed `aws-lc/crypto/bio/hexdump.c`, which implements a BIO hexdump formatter and `BIO_dump` helper by formatting bytes into a memory BIO and then writing the rendered text out. I checked for install hooks, subprocess execution, network/exfiltration, credential access, dynamic code loading, obfuscation, and persistence behavior, and found no concrete malicious or supply-chain indicators.\nReviewed `aws-lc/crypto/decrepit/cfb/cfb.c`, which is a straightforward AES CFB mode implementation and wrapper exports for AES-128/192/256 CFB1/CFB8/CFB128. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators; none were 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/crypto/fipsmodule/cpucap/cpu_arm_linux.h",
      "hash": "blake3:efb2073fb54888e5760cd589a82086c77863c89750671fcbf1a05b7dc751390b",
      "summary": "The target file is a small C header that parses ARM Linux `/proc/cpuinfo` feature strings and maps them to HWCAP2 feature bits for cpu capability detection. I checked it for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and hidden subprocess execution, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/ml_kem/mlkem/cbmc.h",
      "hash": "blake3:461dc88ad9fa2ecc29037de5c3f87a512c995413400040c18f4e38fa08f3ffce",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/ml_kem/mlkem/cbmc.h`, which is a CBMC contract-macro header for the ML-KEM code path. I checked for install-time hooks, network or credential access, dynamic code loading, obfuscation/decoding, persistence, and other hidden execution paths, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/ml_kem/mlkem/native/aarch64/src/aarch64_zetas.c",
      "hash": "blake3:3c3a893643a754f8426a867fdbd73fbe091d03b41e85dcd829a52547ed564887",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/ml_kem/mlkem/native/aarch64/src/aarch64_zetas.c`, which is an auto-generated AArch64 C source file containing only static zeta-value tables for forward and inverse NTT operations plus a compile-time empty-unit fallback. I found no concrete indicators of install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation/deobfuscation, persistence, or other supply-chain compromise in this target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/bio/hexdump.c",
      "hash": "blake3:d0f4df9a78c8234e6de4d119572ddcd749f42386c0e354477efa2c010905e12d",
      "summary": "Reviewed `aws-lc/crypto/bio/hexdump.c`, which implements a BIO hexdump formatter and `BIO_dump` helper by formatting bytes into a memory BIO and then writing the rendered text out. I checked for install hooks, subprocess execution, 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/crypto/decrepit/cfb/cfb.c",
      "hash": "blake3:da04c7e91cb2b84b240355af4cbf914327b02c4557ee2d266f4cb9e918a22a49",
      "summary": "Reviewed `aws-lc/crypto/decrepit/cfb/cfb.c`, which is a straightforward AES CFB mode implementation and wrapper exports for AES-128/192/256 CFB1/CFB8/CFB128. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators; none were present in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}