OTP code length change

[cardinal83]

Good afternoon

MultiOTP server version 5.9.7.1 is installed.

Is it possible to change the length of the OTP code, for example from 6 to 8? I looked through the documentation and couldn't find an answer to this question. The most appropriate parameter by name is token_otp_list_of_length, but changing it did not produce a visible result, and I also did not find its description in the documentation.
Please help me with this question.

[multiOTP]

Hello,

You probably want to change the "default_pin_digits" option, as explained here in the readme file : "default-pin-digits: [4-32] set the default amount of PIN digits"

You can change it directly in the multiotp.ini file, or type the following in command line mode:
multiotp -config default-pin-digits=8

Regards,

[cardinal83]

Hello.

I need to change the MultiOTP settings so that after scanning the QR code in Google Authenticator I do not have 6-digit OTP codes, but, for example, 8-digit ones.
And in the line “number of digits” on the QR code printing page there was not 6, but the number I needed, for example, 8:

[multiOTP]

Hello,
Sure, but if you have already created the qrcode with the previsous default value, it's a 6 digit code.
Simply change the default-pin-digits to 8 as explained, delete the user, recreate the user, and it should have a new 8 digits TOTP token.
Regards

[cardinal83]

Here's what I did:

1. changed the default-pin-digits parameter to 8
2. restarted nginx
3. synchronized a new user from AD
4. The QR code print page will display "number of digits: 6"
5. after scanning the QR code in Google Authenticator, it starts displaying 6 digits instead of 8

Perhaps Google Authenticator does not support 8-digit codes as written here: google/google-authenticator#326 and here google/google-authenticator-libpam#20?
Microsoft Authenticator also show 6 digits code.

[multiOTP]

Hello,
Sorry for the missunderstanding, The default-pin-digits will fix lthe length of the prefix pin.
There is no option yet to define the number of digits displayed for a new user, and the default value is set to 6.
We will put a new option starting with version 5.6.7.2.
Regards,

[cardinal83]

New version is out. Any news about this enchancement?