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ssh: add diffie-hellman-group-exchange-sha256

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Add the diffie-hellman-group-exchange-sha256 defined in RFC 4419 to
the list of supported key exchange algorithms for ssh.
The server half is only a minimal implementation to satisfy the automated tests.

Fixes golang/go#17230

Change-Id: I25880a564347fd9b4738dd2ed1e347cd5d2e21bb
GitHub-Last-Rev: 9f0b8d02c0c96e9baf00cdf1cf063ff834245443
GitHub-Pull-Request: golang/crypto#87
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/174257
Run-TryBot: Han-Wen Nienhuys <hanwen@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Han-Wen Nienhuys <hanwen@google.com>
This commit is contained in:
Lucas Bremgartner
2019-06-17 13:33:40 +00:00
committed by Han-Wen Nienhuys
parent 5c40567a22
commit 57b3e21c3d
6 changed files with 298 additions and 1 deletions
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ssh/test/session_test.go
+5
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@@ -420,6 +420,11 @@ func TestKeyExchanges(t *testing.T) {
var config ssh.Config
config.SetDefaults()
kexOrder := config.KeyExchanges
// Based on the discussion in #17230, the key exchange algorithms
// diffie-hellman-group-exchange-sha1 and diffie-hellman-group-exchange-sha256
// are not included in the default list of supported kex so we have to add them
// here manually.
kexOrder = append(kexOrder, "diffie-hellman-group-exchange-sha1", "diffie-hellman-group-exchange-sha256")
for _, kex := range kexOrder {
t.Run(kex, func(t *testing.T) {
server := newServer(t)