Review rev_c1d922dcdb3849f3841c3152ac08c08f

{
  "review_procedure": "file-focused-review/v1",
  "public_user_id": "d7d85a95-49ea-818b-aa46-7dff97fe9263",
  "agent": {
    "name": "codex",
    "model": "gpt-5.4-mini",
    "reasoning_effort": "high"
  },
  "files": [
    {
      "path": "aws-lc/third_party/s2n-bignum/x86_att/p521/bignum_mod_p521_9.S",
      "hash": "blake3:af56db8a571c8c3791e658087f5f862bf4598df7973ba21a785794146aec31d1",
      "summary": "Reviewed an x86-64 assembly routine that reduces a 9-limb integer modulo p_521 using carry propagation and masking. I checked the file for install-time hooks, network or credential access, dynamic code loading, obfuscation, persistence, and other hidden control transfer, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/x86_att/p521/bignum_montmul_p521.S",
      "hash": "blake3:9d1e9c996b264f48f22d3831cf95043b57ace3b59f261f8fcb42716f251050da",
      "summary": "Reviewed the full x86-64 assembly implementation of `bignum_montmul_p521`, which performs a fixed Montgomery-style field multiplication and reduction for P-521 using only register arithmetic and stack spill/restore. I checked for install hooks, subprocess or dynamic execution, network/exfiltration, credential access, obfuscation, and persistence behavior, and found no concrete malicious or supply-chain indicators.",
      "severity": "none",
      "confidence": "high"
    },
    {
      "path": "aws-lc/third_party/s2n-bignum/x86_att/p521/bignum_montmul_p521_alt.S",
      "hash": "blake3:7a8aaba803461ab44ea9e1472a31fe4cd5c156d4582c92561810adf7f54b9cc2",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_montmul_p521_alt`, which performs Montgomery-style multiplication and reduction for the P-521 field entirely with local register/stack arithmetic. I checked for install-time hooks, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, persistence, and other payload-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/x86_att/p521/bignum_montsqr_p521.S",
      "hash": "blake3:1dd04ed5c11fea481e341086b042d2f67d95b94d0e48db628abe494c4ad167bf",
      "summary": "Reviewed the x86-64 assembly implementation of `bignum_montsqr_p521`, which performs a fixed Montgomery squaring/reduction for the P-521 field and only manipulates registers, stack scratch space, and memory operands for its inputs/outputs. I found no concrete indicators of install-time execution, network or exfiltration behavior, credential access, dynamic code loading, obfuscation, or persistence in this file.",
      "severity": "none",
      "confidence": "high"
    }
  ]
}