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SSH: Add sntrup761x25519-sha512@openssh.com key exchange to configurations

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This algorithm was introduced in OpenSSH 9.0p1; also, align the
curve25519-sha256* key exchanges to keep things tidy.

Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
This commit is contained in:
Peter Müller
2022-04-18 20:40:20 +00:00
parent 7554e857ee
commit 018f80c6cd
2 changed files with 3 additions and 4 deletions
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2
config/ssh/ssh_config
View File

@@ -9,7 +9,7 @@ Host *
UseRoaming no
# Only use secure crypto algorithms
KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
KexAlgorithms sntrup761x25519-sha512@openssh.com,curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,umac-128@openssh.com

5
config/ssh/sshd_config
View File

@@ -19,9 +19,8 @@ LoginGraceTime 30s
# Limit maximum instanctes to prevent DoS
MaxStartups 5
# Only allow safe crypto algorithms (may break some _very_ outdated clients)
# See also: https://stribika.github.io/2015/01/04/secure-secure-shell.html
KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
# Only allow safe crypto algorithms
KexAlgorithms sntrup761x25519-sha512@openssh.com,curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,umac-128@openssh.com