Review rev_f9a60723757940f6994715fd7d9e9386

{
  "summary": "Reviewed the x86-64 assembly implementation of `bignum_cmul`, which performs a bounded big-number multiply-and-store loop with ABI shims and a GNU stack note. I checked for install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden control-flow behavior, and found no concrete malicious or supply-chain indicators in this file.\nReviewed the x86-64 assembly routine `bignum_double_p384`, which performs modular doubling for P-384 with ABI-specific register setup and fixed arithmetic constants. I checked for install-time execution, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden payload behavior, and found no concrete malicious or supply-chain indicators in this file.\nReviewed the x86-64 assembly implementation of `bignum_triple_sm2`, which performs a fixed arithmetic reduction for `z := (3 * x) mod p_sm2` with ABI handling and no runtime indirection. I found no concrete indicators of install hooks, network or exfiltration, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise behavior in this file.\nReviewed `aws-lc/crypto/fipsmodule/bn/rsaz_exp.c`, which contains AVX2-backed RSAZ modular exponentiation and Montgomery reduction helpers for 1024-bit RSA. I checked for install hooks, subprocess launches, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators, and found no concrete malicious or suspicious behavior in this file.\nReviewed `aws-lc/crypto/x509/x509spki.c`, which implements Netscape SPKI pubkey access plus base64 encode/decode and formatted printing. I checked for install hooks, network or exfiltration behavior, credential or secret access, dynamic code loading, obfuscation/deobfuscation, and persistence tampering, and found no concrete malicious or supply-chain indicators 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/third_party/s2n-bignum/s2n-bignum-imported/x86_att/generic/bignum_cmul.S",
      "hash": "blake3:0a824c8841fa1959b8056febb080c19841294c9043fae698a01728db36f0f5ed",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_cmul`, which performs a bounded big-number multiply-and-store loop with ABI shims and a GNU stack note. I checked for install hooks, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden control-flow behavior, 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/x86_att/p384/bignum_double_p384.S",
      "hash": "blake3:7f0598b31fc0906bf1a81a540a32b11c6b13fcb030d1b0f0b3fe1019b8a56cca",
      "summary": "Reviewed the x86-64 assembly routine `bignum_double_p384`, which performs modular doubling for P-384 with ABI-specific register setup and fixed arithmetic constants. I checked for install-time execution, network/exfiltration, credential access, dynamic code loading, obfuscation, persistence, and other hidden payload behavior, 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/x86_att/sm2/bignum_triple_sm2.S",
      "hash": "blake3:4d95945bf7689fe4cb23ed4271606f3028d9bdd513103c46e3c7e30187146aa4",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_triple_sm2`, which performs a fixed arithmetic reduction for `z := (3 * x) mod p_sm2` with ABI handling and no runtime indirection. I found no concrete indicators of install hooks, network or exfiltration, credential access, dynamic code loading, obfuscation, persistence, or other supply-chain compromise behavior in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/fipsmodule/bn/rsaz_exp.c",
      "hash": "blake3:93ff3a8aa280b34c6184e32d99955322bcd41c823c00e56688e9f84ff98b03a2",
      "summary": "Reviewed `aws-lc/crypto/fipsmodule/bn/rsaz_exp.c`, which contains AVX2-backed RSAZ modular exponentiation and Montgomery reduction helpers for 1024-bit RSA. I checked for install hooks, subprocess launches, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and other supply-chain indicators, and found no concrete malicious or suspicious behavior in this file.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/crypto/x509/x509spki.c",
      "hash": "blake3:78f08c56ca728615fc1f58976af41e8388d9c4731ebb455027df34ea9d48b7fa",
      "summary": "Reviewed `aws-lc/crypto/x509/x509spki.c`, which implements Netscape SPKI pubkey access plus base64 encode/decode and formatted printing. I checked for install hooks, network or exfiltration behavior, credential or secret access, dynamic code loading, obfuscation/deobfuscation, and persistence tampering, and found no concrete malicious or supply-chain indicators in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}