Lua Requires Chilkat v9.5.0.92+

SFTP Host Key Fingerprint

See more SFTP Examples

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

local chilkat = require("chilkat")

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

local sftp = chilkat.SFtp.new()

local hostname = "sftp.example.com"
local port = 22
local success = sftp:connect(hostname, port)
if not success then
    print(sftp.last_error_text)
    return
end

-- Get the classic MD5 fingeprint
local md5_fingerprint = sftp.host_key_fingerprint
print(md5_fingerprint)

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

-- We can also get the SHA256 fingerprint.
-- (it is also possible to get fingerprints using other hash algorithms such as SHA384, SHA512, etc.)

local includeKeyType = true
local includeHashName = true
local sha256_fingerprint = sftp:get_host_key_fp("SHA256", includeKeyType, includeHashName)
print(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:get_host_key_fp("SHA256", includeKeyType, includeHashName)
print(sha256_fingerprint)

-- SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

includeKeyType = true
includeHashName = false
sha256_fingerprint = sftp:get_host_key_fp("SHA256", includeKeyType, includeHashName)
print(sha256_fingerprint)

-- ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

includeKeyType = false
includeHashName = false
sha256_fingerprint = sftp:get_host_key_fp("SHA256", includeKeyType, includeHashName)
print(sha256_fingerprint)

-- Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=