constant-time-analysis

No evidence of overt supply-chain malware (no exfiltration/backdoor/system interaction). However, the code is intentionally written to be variable-time: it uses input-derived integer division/modulo and branches on intermediate values (r0, hint). This makes it unsafe for production or any constant-time/side-channel-resistant cryptographic use; its key risk is timing side-channel leakage due to non-constant-time control flow and operations.