FIDO and sub-domains

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Manish Kumar Khedawat

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Jul 9, 2019, 5:21:15 AM7/9/19

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Hello All,

Has anybody dealt with a use case for implementing FIDO authentication on two different sub-domains?

I have two subdomains. Let's say x.mywebsite.com and y.mywebsite.com. Because of some legacy reason, I can't have a single subdomain.

Is there a way/workaround to set up single registration for both subdomain? Just curious because the domain is same and I want to avoid asking the user to register twice on respective subdomains.

Best Regards,

Manish

Emil Lundberg

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Jul 9, 2019, 6:17:57 AM7/9/19

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Hi Manish,

In the case of using WebAuthn, all you need to do is set `rp.id: "mywebsite.com"` [1] on both of your sites.

[1]: https://www.w3.org/TR/2019/REC-webauthn-1-20190304/#dom-publickeycredentialrpentity-id

Emil Lundberg

Software Developer | Yubico

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