Review rev_24c70402e03e47c496f739faf1731ad6

{
  "summary": "Reviewed aws-lc/crypto/fipsmodule/ml_kem/mlkem/sampling.c, which implements ML-KEM rejection sampling and centered binomial distribution helpers plus zeroization for intermediate buffers. I found no concrete malicious or supply-chain indicators in this file: no install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, or hidden subprocess execution.\nReviewed this ARM assembly implementation of `edwards25519_epdouble_alt`, which performs local Curve25519/edwards25519 field arithmetic for point doubling using stack temporaries and fixed-size limb operations. I found no concrete indicators of install-time execution, network or exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior in the target file.\nReviewed `aws-lc/crypto/fipsmodule/evp/internal.h`, which only defines internal EVP/PKEY structures, constants, and function prototypes for key methods, HMAC, ED25519, KEM, and related control paths. I checked for install-time hooks, network or exfiltration logic, credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators, and found none 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/sampling.c",
      "hash": "blake3:17b984b7fa4e99449f49ca9578be7fa27f4a962a925155cbd43a5b069731eecc",
      "summary": "Reviewed aws-lc/crypto/fipsmodule/ml_kem/mlkem/sampling.c, which implements ML-KEM rejection sampling and centered binomial distribution helpers plus zeroization for intermediate buffers. I found no concrete malicious or supply-chain indicators in this file: no install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, or hidden subprocess execution.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/s2n-bignum-imported/arm/curve25519/edwards25519_epdouble_alt.S",
      "hash": "blake3:ea36893bc1e34f82006d1f5737735918892dc3e016fae6e73e363b75110e3fad",
      "summary": "Reviewed this ARM assembly implementation of `edwards25519_epdouble_alt`, which performs local Curve25519/edwards25519 field arithmetic for point doubling using stack temporaries and fixed-size limb operations. I found no concrete indicators of install-time execution, network or exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior in the target file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/evp/internal.h",
      "hash": "blake3:e3439f88eb7394ce836472207fde6ed42e320377655cae285b0192b0baf5b448",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/evp/internal.h`, which only defines internal EVP/PKEY structures, constants, and function prototypes for key methods, HMAC, ED25519, KEM, and related control paths. I checked for install-time hooks, network or exfiltration logic, credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators, and found none in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}