Registering Firebase as an identity provider for Tapkey

Question

I am working on an App which uses Firebase for authentication, and I wish to exchange the token I get back from Firebase Auth for a Tapkey token using their Token Exchange API.

The form to add an identity provider has four fields, I am trying with the following values:

• Name -> Firebase
• Audience -> Using my Firebase Project ID (as described here)
• Issuer -> https://securetoken.google.com/(projectId) (as described here)
• Public Key -> Have tried both of the public keys listed here, neither are valid (error when submitting the form)

Which are the correct values to use with adding Firebase Auth as an Identity Provider to Tapkey?

Thanks

Answer 1

These are no public keys, they are certificates. The form expects a public key in pem format, which starts with -----BEGIN PUBLIC KEY-----.

You have to extract the public key from the certificate. You can do that with openssl. Save the certificate as cert.pem, make sure to replace the "\n" with line breaks and use the following openssl command:

openssl x509 -pubkey -noout -in cert.pem  > pubkey.pem