VB.NET

SSH Host Key Fingerprint

See more SSH Examples

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

Dim success As Boolean = False

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

Dim ssh As New Chilkat.Ssh

Dim hostname As String = "ssh.example.com"
Dim port As Integer = 22
success = ssh.Connect(hostname,port)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' Get the classic MD5 fingeprint
Dim md5_fingerprint As String = ssh.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.)

Dim includeKeyType As Boolean = True
Dim includeHashName As Boolean = True
Dim sha256_fingerprint As String = ssh.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 = ssh.GetHostKeyFP("SHA256",includeKeyType,includeHashName)
Debug.WriteLine(sha256_fingerprint)

' SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

includeKeyType = True
includeHashName = False
sha256_fingerprint = ssh.GetHostKeyFP("SHA256",includeKeyType,includeHashName)
Debug.WriteLine(sha256_fingerprint)

' ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

includeKeyType = False
includeHashName = False
sha256_fingerprint = ssh.GetHostKeyFP("SHA256",includeKeyType,includeHashName)
Debug.WriteLine(sha256_fingerprint)

' Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=