The error message reported by the ssh client when it can't find a
"cipher" in common between the client and server was overly vague. This
adds more detailed error messages to findAgreedAlgorithms so that the
user can more easily identify which of the components can't reach
agreement.
Change-Id: I4d985e92fea964793213e5600b52b3141e712000
Reviewed-on: https://go-review.googlesource.com/13817
Reviewed-by: Adam Langley <agl@golang.org>
Unblock writers if a read error occurs while writers are blocked on a
pending key change.
Add test to check for deadlocks in error paths in handshake.go
Fixesgolang/go#11992.
Change-Id: Id098bd9fec3d4fe83daeb2b7f935e5647c19afd3
Reviewed-on: https://go-review.googlesource.com/13594
Reviewed-by: Adam Langley <agl@golang.org>
Fixesgolang/go#11882
If an error occurs during handshakeTransport.writePacket the lock may not be
released. Fix this by using defer rather than manually unlocking in all paths.
Change-Id: I0010284b4f7d99907c86b4c0e140ab6cf37b0441
Reviewed-on: https://go-review.googlesource.com/12888
Reviewed-by: Adam Langley <agl@golang.org>