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(PowerShell) SSH Tunnel Set Allowed AlgorithmsSee more SSH Tunnel ExamplesDemonstrates how to explicitly set the algorithms allowed in the SSH connection protocol for SSH tunneling. Note: This example requires Chilkat v9.5.0.99 or greater.
Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll" # This example requires the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. $ssh_tunnel = New-Object Chilkat.SshTunnel $json = New-Object Chilkat.JsonObject # Here are the algorithms supported by Chilkat at the time this example was written (14-June-2024) # --------------------------- # SSH Key-Exchange Algorithms # --------------------------- # curve25519-sha256 # curve25519-sha256@libssh.org # ecdh-sha2-nistp256 # ecdh-sha2-nistp384 # ecdh-sha2-nistp521 # diffie-hellman-group14-sha256 # diffie-hellman-group16-sha512 # diffie-hellman-group18-sha512 # diffie-hellman-group-exchange-sha256 # diffie-hellman-group1-sha1 # diffie-hellman-group14-sha1 # diffie-hellman-group-exchange-sha1 # --------------------------- # SSH Host Key Algorithms # --------------------------- # ssh-ed25519 # ecdsa-sha2-nistp256 # ecdsa-sha2-nistp384 # ecdsa-sha2-nistp521 # rsa-sha2-256 # rsa-sha2-512 # ssh-rsa # ssh-dss # --------------------------- # SSH Cipher Algorithms # --------------------------- # chacha20-poly1305@openssh.com # aes128-ctr # aes256-ctr # aes192-ctr # aes128-cbc # aes256-cbc # aes192-cbc # aes128-gcm@openssh.com # aes256-gcm@openssh.com # twofish256-cbc # twofish128-cbc # blowfish-cbc # --------------------------- # SSH MAC Algorithms # --------------------------- # hmac-sha2-256 # hmac-sha2-512 # hmac-sha2-256-etm@openssh.com # hmac-sha2-512-etm@openssh.com # hmac-sha1-etm@openssh.com # hmac-sha1 # hmac-ripemd160 # hmac-sha1-96 # hmac-md5 # Specify the allowed key-exchange, host-key, cipher (i.e. encryption), and mac (i.e. hash) algorithms allowed, in the order of preference. # ------------------------------------------------------------------------------------------------------------------------------------------- # Note: You typically should NOT explicitly set allowed algorithms. # By default, Chilkat orders algorithms according to best practices, and pays attention to vulnerabilities such as the "Terrapin Attack". # Hard-coding algorthims can make your application brittle and prone to breaking over a long period of time, # if a server (at some point in the future) changes its allowed algorithms, or if you connect to a different server, # such that the client (Chilkat) and server cannot find a set of mutually agreed-upon algorithms. # ------------------------------------------------------------------------------------------------------------------------------------------- $allowed_kex = "curve25519-sha256@libssh.org,ecdh-sha2-nistp256" $allowed_hostKey = "ssh-ed25519,ecdsa-sha2-nistp256" $allowed_cipher = "chacha20-poly1305@openssh.com,aes256-ctr" $allowed_mac = "hmac-sha2-256,hmac-sha2-512" $json.UpdateString("kex",$allowed_kex) $json.UpdateString("hostKey",$allowed_hostKey) $json.UpdateString("cipher",$allowed_cipher) $json.UpdateString("mac",$allowed_mac) $ssh_tunnel.SetAllowedAlgorithms($json) $port = 22 $success = $ssh_tunnel.Connect("example.com",$port) if ($success -ne $true) { $($ssh_tunnel.LastErrorText) exit } $("Connected.") # .... # .... |
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