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upstream: add a note about the 'extensions' field in the signed 

object

OpenBSD-Commit-ID: 67c01e0565b258e0818c1ccfe1f1aeaf9a0d4c7b
This commit is contained in:
djm@openbsd.org 2019-12-11 22:19:47 +00:00 committed by Damien Miller
parent a62f4e1960
commit c33d46868c
1 changed files with 4 additions and 0 deletions
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4
PROTOCOL.u2f
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@ -170,6 +170,10 @@ is signed over a blob that consists of:
byte[] extensions byte[] extensions
byte[32] SHA256(message) byte[32] SHA256(message)
No extensons are yet defined for SSH use. If any are defined in the future,
it will be possible to infer their presence from the contents of the "flags"
value.
The signature returned from U2F hardware takes the following format: The signature returned from U2F hardware takes the following format:
byte flags (including "user present") byte flags (including "user present")