(Visual FoxPro) SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loSsh
LOCAL lcHostname
LOCAL lnPort
LOCAL lnSuccess
LOCAL loKey
LOCAL lcPrivKey

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Ssh')
loSsh = CreateObject('Chilkat.Ssh')

* Set some timeouts, in milliseconds:
loSsh.ConnectTimeoutMs = 5000
loSsh.IdleTimeoutMs = 15000

* Connect to the SSH server.  
* The standard SSH port = 22
* The hostname may be a hostname or IP address.
lcHostname = "sftp.example.com"
lnPort = 22
lnSuccess = loSsh.Connect(lcHostname,lnPort)
IF (lnSuccess <> 1) THEN
    ? loSsh.LastErrorText
    RELEASE loSsh
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.SshKey')
loKey = CreateObject('Chilkat.SshKey')

* Read the PEM file into a string variable:
* (This does not load the PEM file into the key.  The LoadText
* method is a convenience method for loading the full contents of ANY text
* file into a string variable.)
lcPrivKey = loKey.LoadText("myPrivateKey.pem")
IF (loKey.LastMethodSuccess <> 1) THEN
    ? loKey.LastErrorText
    RELEASE loSsh
    RELEASE loKey
    CANCEL
ENDIF

* Load a private key from a PEM string:
* (Private keys may be loaded from OpenSSH and Putty formats.
* Both encrypted and unencrypted private key file formats
* are supported.  This example loads an unencrypted private
* key in OpenSSH format.  PuTTY keys typically use the .ppk
* file extension, while OpenSSH keys use the PEM format.
* (For PuTTY keys, call FromPuttyPrivateKey instead.)
lnSuccess = loKey.FromOpenSshPrivateKey(lcPrivKey)
IF (lnSuccess <> 1) THEN
    ? loKey.LastErrorText
    RELEASE loSsh
    RELEASE loKey
    CANCEL
ENDIF

* Authenticate with the SSH server using the login and
* private key.  (The corresponding public key should've 
* been installed on the SSH server beforehand.)
lnSuccess = loSsh.AuthenticatePk("myLogin",loKey)
IF (lnSuccess <> 1) THEN
    ? loSsh.LastErrorText
    RELEASE loSsh
    RELEASE loKey
    CANCEL
ENDIF

? loSsh.LastErrorText
? "Public-Key Authentication Successful!"

RELEASE loSsh
RELEASE loKey