Lua

Load an SSH Key from a File (Many Formats Supported)

Demonstrates how to load an SSH public or private key object from a file. The file can be in any of the following formats:

• OpenSSH private key
• OpenSSH public key
• PuTTY private key
• RFC 4716 public key

Lua

local chilkat = require("chilkat")

local sshkey = chilkat.SshKey.new()

-- First, use the LoadText convenience method to load a text file (of any SSH key format)
-- into a string:
local strKey = sshkey:load_text("../mySshKeys/myKey.txt")

-- Next, load the key into the SSH key object.

-- If the key is an OpenSSH private key:
-- (In actuality, the From* methods will automatically detect the format and load
-- the key correctly.  For example, if a PuTTY private key is passed to FromOpenSshPrivateKey,
-- it  will still load correctly.)
local success = sshkey:from_open_ssh_private_key(strKey)
if not success then
    print(sshkey.last_error_text)
else
    print("Loaded OpenSSH private key.")
    return
end

-- If the key is an OpenSSH public key:
success = sshkey:from_open_ssh_public_key(strKey)
if not success then
    print(sshkey.last_error_text)
else
    print("Loaded OpenSSH public key.")
    return
end

-- If the key is a PuTTY private key:
success = sshkey:from_putty_private_key(strKey)
if not success then
    print(sshkey.last_error_text)
else
    print("Loaded PuTTY private key.")
    return
end

-- If the key is an RFC 4716 public key:
success = sshkey:from_rfc4716_public_key(strKey)
if not success then
    print(sshkey.last_error_text)
else
    print("Loaded RFC 4716 public key.")
end