Review rev_04740a51d5e742ca87d5dca029a81515

{
  "summary": "Reviewed `aws-lc/crypto/fipsmodule/ml_kem/mlkem/symmetric.h`, a small C header that only defines ML-KEM/FIPS 203 macro wrappers around SHA3/SHAKE primitives and x4 variants. I checked for install-time hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden execution paths, and found no concrete malicious or supply-chain indicators in this file.\nReviewed this ARM assembly routine for modular reduction in secp256k1; it only loads four 64-bit limbs, performs constant-time arithmetic and conditional selects, then stores the reduced result. I found no concrete malicious or supply-chain indicators in this file, and no install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior.\nReviewed this header-only macro shim for the ML-DSA symmetric/XOF helpers. It only aliases AWS-LC SHAKE128/SHAKE256 context and absorb/squeeze functions, and I found no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence in the target file.\nReviewed `aws-lc/crypto/fipsmodule/rand/cpu_jitter_test.cc`, which is a small GoogleTest exercising the jitterentropy collector allocation, entropy reads, reset behavior, and version check. I found no concrete malicious or supply-chain indicators in this file: no install hooks, network or exfiltration code, credential access, dynamic code loading, obfuscation, persistence, or hidden subprocess execution.\nReviewed `aws-lc/crypto/x509/v3_int.c`, which only defines small X.509 extension helper callbacks and static `X509V3_EXT_METHOD` tables for CRL number, delta CRL, and inhibit-any-policy handling. I found no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence 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/ml_kem/mlkem/symmetric.h",
      "hash": "blake3:ddfb7f9da339cf6159dbf6991359c815252f1c0fd986760bf330fd1b00b9896f",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/ml_kem/mlkem/symmetric.h`, a small C header that only defines ML-KEM/FIPS 203 macro wrappers around SHA3/SHAKE primitives and x4 variants. I checked for install-time hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, 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/third_party/s2n-bignum/s2n-bignum-imported/arm/secp256k1/bignum_mod_p256k1_4.S",
      "hash": "blake3:50b07ca73ee62f0ac37924020b85f255ebf12a98cd5419d18d1d3783cb775ba3",
      "summary": "Reviewed this ARM assembly routine for modular reduction in secp256k1; it only loads four 64-bit limbs, performs constant-time arithmetic and conditional selects, then stores the reduced result. I found no concrete malicious or supply-chain indicators in this file, and no install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/ml_dsa/mldsa/symmetric.h",
      "hash": "blake3:3b4c1108a7e9a3f7f32d5950bed66a3ae561a34fcd918cb324959e19870488a5",
      "summary": "Reviewed this header-only macro shim for the ML-DSA symmetric/XOF helpers. It only aliases AWS-LC SHAKE128/SHAKE256 context and absorb/squeeze functions, and I found no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence in the target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/rand/cpu_jitter_test.cc",
      "hash": "blake3:fbb884ab6f80b7401196c214800e08dde4c28558a0392279c54aa13e79e0c686",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/rand/cpu_jitter_test.cc`, which is a small GoogleTest exercising the jitterentropy collector allocation, entropy reads, reset behavior, and version check. I found no concrete malicious or supply-chain indicators in this file: no install hooks, network or exfiltration code, credential access, dynamic code loading, obfuscation, persistence, or hidden subprocess execution.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/x509/v3_int.c",
      "hash": "blake3:a13b23784e97d5e81814d9fd525a61d8158f15e31414485a56bb82b6b9ffb27c",
      "summary": "Reviewed `aws-lc/crypto/x509/v3_int.c`, which only defines small X.509 extension helper callbacks and static `X509V3_EXT_METHOD` tables for CRL number, delta CRL, and inhibit-any-policy handling. I found no concrete indicators of install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}