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SSH.NET is a Secure Shell (SSH) library for .NET, optimized for parallelism.
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Latest commit bd01d97 Jul 30, 2018


SSH.NET is a Secure Shell (SSH-2) library for .NET, optimized for parallelism.

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This project was inspired by Sharp.SSH library which was ported from java and it seems like was not supported for quite some time. This library is a complete rewrite, without any third party dependencies, using parallelism to achieve the best performance possible.


  • Execution of SSH command using both synchronous and asynchronous methods
  • Return command execution exit status and other information
  • Provide SFTP functionality for both synchronous and asynchronous operations
  • Provides SCP functionality
  • Provide status report for upload and download sftp operations to allow accurate progress bar implementation
  • Remote, dynamic and local port forwarding
  • Shell/Terminal implementation
  • Specify key file pass phrase
  • Use multiple key files to authenticate
  • Supports 3des-cbc, aes128-cbc, aes192-cbc, aes256-cbc, aes128-ctr, aes192-ctr, aes256-ctr, blowfish-cbc, cast128-cbc, arcfour and twofish encryptions
  • Supports publickey, password and keyboard-interactive authentication methods
  • Supports RSA and DSA private key
  • Supports DES-EDE3-CBC, DES-EDE3-CFB, DES-CBC, AES-128-CBC, AES-192-CBC and AES-256-CBC algorithms for private key encryption
  • Supports two-factor or higher authentication
  • Supports SOCKS4, SOCKS5 and HTTP Proxy

Key Exchange Method

SSH.NET supports the following key exchange methods:

  • diffie-hellman-group-exchange-sha256
  • diffie-hellman-group-exchange-sha1
  • diffie-hellman-group14-sha1
  • diffie-hellman-group1-sha1

Message Authentication Code

SSH.NET supports the following MAC algorithms:

  • hmac-md5
  • hmac-md5-96
  • hmac-sha1
  • hmac-sha1-96
  • hmac-sha2-256
  • hmac-sha2-256-96
  • hmac-sha2-512
  • hmac-sha2-512-96
  • hmac-ripemd160

Framework Support

SSH.NET supports the following target frameworks:

  • .NET Framework 3.5
  • .NET Framework 4.0 (and higher)
  • .NET Standard 1.3
  • Silverlight 4
  • Silverlight 5
  • Windows Phone 7.1
  • Windows Phone 8.0
  • Universal Windows Platform 10


Multi-factor authentication

Establish a SFTP connection using both password and public-key authentication:

var connectionInfo = new ConnectionInfo("",
                                        new PasswordAuthenticationMethod("guest", "pwd"),
                                        new PrivateKeyAuthenticationMethod("rsa.key"));
using (var client = new SftpClient(connectionInfo))

Verify host identify

Establish a SSH connection using user name and password, and reject the connection if the fingerprint of the server does not match the expected fingerprint:

byte[] expectedFingerPrint = new byte[] {
                                            0x66, 0x31, 0xaf, 0x00, 0x54, 0xb9, 0x87, 0x31,
                                            0xff, 0x58, 0x1c, 0x31, 0xb1, 0xa2, 0x4c, 0x6b

using (var client = new SshClient("", "guest", "pwd"))
    client.HostKeyReceived += (sender, e) =>
            if (expectedFingerPrint.Length == e.FingerPrint.Length)
                for (var i = 0; i < expectedFingerPrint.Length; i++)
                    if (expectedFingerPrint[i] != e.FingerPrint[i])
                        e.CanTrust = false;
                e.CanTrust = false;

Building SSH.NET

Software net35 net40 netstandard1.3 sl4 sl5 wp71 wp8 uap10.0
Windows Phone SDK 8.0 x x x x
Visual Studio 2012 Update 5 x x x x x x
Visual Studio 2015 Update 3 x x x x x
Visual Studio 2017 x x


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