Added TOTP (6 digits) functionality to ykchalresp.c

[joernchen]

This should implement TOTP with a fixed time step of 30 seconds and 6 digits output.

[klali]

Hello, Good job!

If you're interested I'd like one refactor before we merge this: let -t mean take challenge from time and a new flag (-o?) for outputting the result as an oath code

that way you could also get oath output from a chosen challenge.

Maybe the -8 could also be refactored to be -d {digits}, but that's more of cosmetics.

/klas

[joernchen]

Hi,

those suggestions sound good, I just tried it to implement it as simple as possible.

joernchen

[klali]

Completely understandable, and I think it's a good addition to the tool. My questiion is mostly along the lines of if you want to implement that, or if I should merge this and have as a goal to move the code in that direction.

/klas

[joernchen]

I can refactor those parts. =)

[joernchen]

Refactored the flags as follows:

-t: take challenge form current time -6: Output 6 digits HOTP/TOTP style -8: Output 8 digits HOTP/TOTP style

so -6 and -8 can be used independently from -t

[klali]

Very good.

Just to be clear on the formality: Do you agree to contribute this under the license of the project?

/klas

[joernchen]

Yes (I wouldn't have made a pull request otherwise) ;)

[klali]

=)

thanks for the contribution!