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-rw-r--r--PROTOCOL.u2f8
1 files changed, 8 insertions, 0 deletions
diff --git a/PROTOCOL.u2f b/PROTOCOL.u2f
index bd60f9fac..ca55c4297 100644
--- a/PROTOCOL.u2f
+++ b/PROTOCOL.u2f
@@ -148,6 +148,14 @@ be reformatted slightly and the ecdsa_signature_blob value has the encoding:
Where 'r' and 's' are extracted by the client or token middleware from the
ecdsa_signature field returned from the hardware.
+For Ed25519 keys the signature is encoded as:
+
+ string "sk-ssh-ed25519@openssh.com"
+ string signature
+ byte flags
+ uint32 counter
+
+
ssh-agent protocol extensions
-----------------------------