(C#) SFTP Host Key Fingerprint

See more SFTP Examples

Demonstrates how to get the SSH server's host key fingerprint after connecting.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.SFtp sftp = new Chilkat.SFtp();

string hostname = "sftp.example.com";
int port = 22;
bool success = sftp.Connect(hostname,port);
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

// Get the classic MD5 fingeprint
string md5_fingerprint = sftp.HostKeyFingerprint;
Debug.WriteLine(md5_fingerprint);

// Sample output:
// ssh-rsa 3072 21:b0:d8:41:4e:ef:78:10:20:af:01:b7:71:5d:eb:94

// Starting in Chilkat v9.5.0.92, we can also get the SHA256 fingerprint.
// (it is also possible to get fingerprints using other hash algorithms such as SHA384, SHA512, etc.)

bool includeKeyType = true;
bool includeHashName = true;
string sha256_fingerprint = sftp.GetHostKeyFP("SHA256",includeKeyType,includeHashName);
Debug.WriteLine(sha256_fingerprint);

// Sample output:
// ssh-rsa SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

// The key type and hash name can be optionally included or not.
includeKeyType = false;
includeHashName = true;
sha256_fingerprint = sftp.GetHostKeyFP("SHA256",includeKeyType,includeHashName);
Debug.WriteLine(sha256_fingerprint);

// SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

includeKeyType = true;
includeHashName = false;
sha256_fingerprint = sftp.GetHostKeyFP("SHA256",includeKeyType,includeHashName);
Debug.WriteLine(sha256_fingerprint);

// ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

includeKeyType = false;
includeHashName = false;
sha256_fingerprint = sftp.GetHostKeyFP("SHA256",includeKeyType,includeHashName);
Debug.WriteLine(sha256_fingerprint);

// Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=