python (12.9k questions)

javascript (9.2k questions)

reactjs (4.7k questions)

java (4.2k questions)

java (4.2k questions)

c# (3.5k questions)

c# (3.5k questions)

html (3.3k questions)

Questions - hmacsha1

why my code doesn't generate the same OTP like google authenticator?

someone know why this TOTP code doesn't generate the same OTP like google authenticator??? the SHA1-HASH function is working well, it's just the final OTP that dosen't generated correct. I tried to c...
test-img

daniel danino

c

sha1

hmacsha1

google-authenticator

totp

Votes: 0

Answers: 1

Latest Answer

You have some UB (undefined behavior). You're doing strlen(counter) but counter is unitialized. And, for crypto, you probably want sizeof(counter) as you've done in other places. There are other place...
test-img

Craig Estey

Posts

Questions

Blogs

Jobs