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(Mono C#) 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.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. bool success; Chilkat.SshTunnel ssh_tunnel = new Chilkat.SshTunnel(); Chilkat.JsonObject json = new 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. // ------------------------------------------------------------------------------------------------------------------------------------------- string allowed_kex = "curve25519-sha256@libssh.org,ecdh-sha2-nistp256"; string allowed_hostKey = "ssh-ed25519,ecdsa-sha2-nistp256"; string allowed_cipher = "chacha20-poly1305@openssh.com,aes256-ctr"; string 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); int port = 22; success = ssh_tunnel.Connect("example.com",port); if (success != true) { Debug.WriteLine(ssh_tunnel.LastErrorText); return; } Debug.WriteLine("Connected."); // .... // .... |
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