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Scratch codes #25

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ohmer1 opened this issue Jan 26, 2018 · 3 comments
Open

Scratch codes #25

ohmer1 opened this issue Jan 26, 2018 · 3 comments

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@ohmer1
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ohmer1 commented Jan 26, 2018

Hello,

Is there a way to support scratch codes generated by google authenticator?
@calve
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calve commented Jan 31, 2018

AFAIU crash code are pregenerated HOTP. Those are supported by openvpn-otp.

@ohmer1
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ohmer1 commented Jan 31, 2018

I tried the generated codes but they are not working. I don't know if this is related, but the generated scratch codes have 8 digits but normal codes have only 6.

I use Google Authenticator to generate OTP keys:
google-authenticator --time-based --disallow-reuse --force --rate-limit=3 --rate-time=30 --window-size=17 --label=${USER}@sdomain.tld --secret=/root/ovpn2fa_secret

@calve
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calve commented Apr 20, 2018

Looks like you can configure the lenght of codes with the totp_digits param (see readme) but it might apply to both HOTP and TOTP https://github.com/evgeny-gridasov/openvpn-otp/blob/master/src/otp.c#L619

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@ohmer1 @calve