KullGames LiveAuthenticator

A real RFC 6238 TOTP / RFC 4226 HOTP implementation from OnlyCSharp 3.0 Cybersecurity.Cryptography.OneTimePassword (OcTotp / OcHotp / OcOtpAuthUri) - the same algorithm behind Google Authenticator and Authy. Every code below is computed live at build time. No JavaScript, no WASM.

Live code (build-time snapshot)

Demo shared secret (NOT a real credential): MySuperSecretKey123!

Field	Value
Unix time sampled	1784570844
Current 6-digit code	898986
Refreshes in	6 s
Round-trip Verify()	True

otpauth:// provisioning URI (what a QR code would encode):

otpauth://totp/KullGames%20LiveAuthenticator%20Demo:demo%40kullgames.com?secret=JV4VG5LQMVZFGZLDOJSXIS3FPEYTEMZB&issuer=KullGames%20LiveAuthenticator%20Demo&algorithm=SHA1&digits=6&period=30

RFC 4226 HOTP test vectors (Appendix D)

Key = ASCII "12345678901234567890", 6 digits, SHA-1. Passed 10/10.

Counter	Computed	RFC expected	Match
0	755224	755224	OK
1	287082	287082	OK
2	359152	359152	OK
3	969429	969429	OK
4	338314	338314	OK
5	254676	254676	OK
6	287922	287922	OK
7	162583	162583	OK
8	399871	399871	OK
9	520489	520489	OK

RFC 6238 TOTP test vectors (Appendix B)

8-digit codes, 30s period, per-hash keys. Passed 18/18.

Unix time	Algorithm	Computed	RFC expected	Match
59	SHA1	94287082	94287082	OK
59	SHA256	46119246	46119246	OK
59	SHA512	90693936	90693936	OK
1111111109	SHA1	07081804	07081804	OK
1111111109	SHA256	68084774	68084774	OK
1111111109	SHA512	25091201	25091201	OK
1111111111	SHA1	14050471	14050471	OK
1111111111	SHA256	67062674	67062674	OK
1111111111	SHA512	99943326	99943326	OK
1234567890	SHA1	89005924	89005924	OK
1234567890	SHA256	91819424	91819424	OK
1234567890	SHA512	93441116	93441116	OK
2000000000	SHA1	69279037	69279037	OK
2000000000	SHA256	90698825	90698825	OK
2000000000	SHA512	38618901	38618901	OK
20000000000	SHA1	65353130	65353130	OK
20000000000	SHA256	77737706	77737706	OK
20000000000	SHA512	47863826	47863826	OK