Ruby

SFTP Host Key Fingerprint

See more SFTP Examples

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

require 'chilkat'

success = false

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

sftp = Chilkat::CkSFtp.new()

hostname = "sftp.example.com"
port = 22
success = sftp.Connect(hostname,port)
if (success != true)
    print sftp.lastErrorText() + "\n";
    exit
end

# Get the classic MD5 fingeprint
md5_fingerprint = sftp.hostKeyFingerprint()
print md5_fingerprint + "\n";

# 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.)

includeKeyType = true
includeHashName = true
sha256_fingerprint = sftp.getHostKeyFP("SHA256",includeKeyType,includeHashName)
print sha256_fingerprint + "\n";

# 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)
print sha256_fingerprint + "\n";

# SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

includeKeyType = true
includeHashName = false
sha256_fingerprint = sftp.getHostKeyFP("SHA256",includeKeyType,includeHashName)
print sha256_fingerprint + "\n";

# ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

includeKeyType = false
includeHashName = false
sha256_fingerprint = sftp.getHostKeyFP("SHA256",includeKeyType,includeHashName)
print sha256_fingerprint + "\n";

# Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=