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authordjm@openbsd.org <djm@openbsd.org>2019-12-11 22:19:47 +0000
committerDamien Miller <djm@mindrot.org>2019-12-14 07:09:23 +1100
commitc33d46868c3d88e04a92610cdb429094aeeb5847 (patch)
tree9901cc8f4a414da79a8c2d17ee6fbe59ac6374ff /PROTOCOL.u2f
parenta62f4e1960691f3aeb1f972e009788b29e2ae464 (diff)
upstream: add a note about the 'extensions' field in the signed
object OpenBSD-Commit-ID: 67c01e0565b258e0818c1ccfe1f1aeaf9a0d4c7b
Diffstat (limited to 'PROTOCOL.u2f')
-rw-r--r--PROTOCOL.u2f4
1 files changed, 4 insertions, 0 deletions
diff --git a/PROTOCOL.u2f b/PROTOCOL.u2f
index 32bfa20f3..066d09951 100644
--- a/PROTOCOL.u2f
+++ b/PROTOCOL.u2f
@@ -170,6 +170,10 @@ is signed over a blob that consists of:
170 byte[] extensions 170 byte[] extensions
171 byte[32] SHA256(message) 171 byte[32] SHA256(message)
172 172
173No extensons are yet defined for SSH use. If any are defined in the future,
174it will be possible to infer their presence from the contents of the "flags"
175value.
176
173The signature returned from U2F hardware takes the following format: 177The signature returned from U2F hardware takes the following format:
174 178
175 byte flags (including "user present") 179 byte flags (including "user present")