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Docs fixups

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Ernie Hershey 2019-04-06 13:28:16 -04:00 committed by GitHub
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docs/solo/fido2-impl.md
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@ -22,8 +22,8 @@ for FIDO2 operation.
When you register a service with a FIDO2 or U2F authenticator, the When you register a service with a FIDO2 or U2F authenticator, the
authenticator must generate a new keypair unique to that service. This keypair authenticator must generate a new keypair unique to that service. This keypair
could be stored on the authenticator to be used in subsequent authentications, could be stored on the authenticator to be used in subsequent authentications,
but now a certain amount of memory needs to be allocated for this. On embedded but a certain amount of memory would need to be allocated for this. On embedded
devices, there isn't much memory to spare and users will allows frustratingly devices, there isn't much memory to spare and users would frustratingly
hit the limit of this memory. hit the limit of this memory.
The answer to this problem is to do key wrapping. The authenticator just The answer to this problem is to do key wrapping. The authenticator just
@ -39,7 +39,7 @@ In essence, the following happens at registration.
3. Return `P` and `R` to service. (`R` is in `KEYID` parameter) 3. Return `P` and `R` to service. (`R` is in `KEYID` parameter)
4. Service stores `P` and `R`. 4. Service stores `P` and `R`.
Now on authenication. Now on authentication.
1. Service issues authentication request with `R` in `KEYID` parameter. 1. Service issues authentication request with `R` in `KEYID` parameter.
2. \* Authenticator generates `K` by calculating `HMAC(M,R)`. 2. \* Authenticator generates `K` by calculating `HMAC(M,R)`.