Review rev_fff28bffb7ee463b8abd0b5d203d22ab

{
  "summary": "Reviewed `aws-lc/crypto/hrss/internal.h`, which is a small C header declaring HRSS polynomial types and cryptographic function prototypes plus a guarded AVX2 assembly entry point. I found no concrete malicious or supply-chain indicators in this file: there are no install hooks, network or exfiltration logic, credential access, dynamic code loading, obfuscation, or persistence behavior.\nReviewed `aws-lc/crypto/x509/x_val.c`, which only declares the `X509_VAL` ASN.1 sequence for `notBefore`/`notAfter` timestamps and instantiates the generated const ASN.1 helpers. I found no concrete indicators of install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise in this file.\nReviewed the ARM assembly implementation of `bignum_optsub`, which performs a conditional multi-limb subtraction based on the `p` flag and returns the carry-out. I found no concrete malicious or supply-chain indicators in this file: no install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior.\nReviewed the ARM assembly implementation of `bignum_demont_p521`, which performs a fixed 521-bit Montgomery-domain rotation/copy using register shifts and loads/stores only. 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/rand/cpu_jitter_test.cc`, which is a small GoogleTest unit test for the Jitter entropy collector: it allocates the collector, reads entropy twice, checks the oversampling rate, and verifies the library version. I found no concrete indicators of install hooks, network or exfiltration behavior, 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/hrss/internal.h",
      "hash": "blake3:4d48a4bcb335edd6fb1382bcfc5754ef3f7898983db0a6d9feba20857c751068",
      "summary": "Reviewed `aws-lc/crypto/hrss/internal.h`, which is a small C header declaring HRSS polynomial types and cryptographic function prototypes plus a guarded AVX2 assembly entry point. I found no concrete malicious or supply-chain indicators in this file: there are no install hooks, network or exfiltration logic, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/x509/x_val.c",
      "hash": "blake3:c6d5e69f840691857460524845924889c017b0a6342bec053f001f178d4475f9",
      "summary": "Reviewed `aws-lc/crypto/x509/x_val.c`, which only declares the `X509_VAL` ASN.1 sequence for `notBefore`/`notAfter` timestamps and instantiates the generated const ASN.1 helpers. I found no concrete indicators of install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/arm/generic/bignum_optsub.S",
      "hash": "blake3:a4b98159fbfad2f7e005cad7eb615ebf7d913ab06e8bdce1db68e24bc3d9ad43",
      "summary": "Reviewed the ARM assembly implementation of `bignum_optsub`, which performs a conditional multi-limb subtraction based on the `p` flag and returns the carry-out. I found no concrete malicious or supply-chain indicators in this file: no install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, or persistence behavior.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/arm/p521/bignum_demont_p521.S",
      "hash": "blake3:0f8cd30a68c2d6ad60c4c2c93c2b8d56e337703783917cb69d0d593a785fdf45",
      "summary": "Reviewed the ARM assembly implementation of `bignum_demont_p521`, which performs a fixed 521-bit Montgomery-domain rotation/copy using register shifts and loads/stores only. 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/rand/cpu_jitter_test.cc",
      "hash": "blake3:f4133e530d5e82bec13a8f192c39ed8d38825d94070857a6aecc188653384567",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/rand/cpu_jitter_test.cc`, which is a small GoogleTest unit test for the Jitter entropy collector: it allocates the collector, reads entropy twice, checks the oversampling rate, and verifies the library version. I found no concrete indicators of install hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}