Visual FoxPro

SSH Authenticate with Password and Private Key

Demonstrates the Chilkat Ssh.AuthenticatePwPk method, which authenticates with a server that requires both a password and a private key. The first argument is the username, the second is the password, and the third is an SshKey private key.

Note: The private-key path is relative to the application's current working directory. Supply the path to your own key file.

Background: Most servers require either a password or a public key, not both — but some high-security configurations mandate multi-factor SSH, combining something you know (the password) with something you have (the key). This method satisfies that policy in one call. As always, the password should come from a secure source rather than a literal in code.

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LOCAL lnSuccess
LOCAL loSsh
LOCAL lnSshPort
LOCAL lcPassword
LOCAL loPrivKey
LOCAL lcKeyStr

lnSuccess = 0

*  Demonstrates the Ssh.AuthenticatePwPk method, which authenticates with a server that requires
*  BOTH a password and a private key.  The 1st argument is the username, the 2nd is the
*  password, and the 3rd is an SshKey private key.

loSsh = CreateObject('Chilkat.Ssh')

*  Connect to the SSH server.  Port 22 is the usual SSH port.
lnSshPort = 22
lnSuccess = loSsh.Connect("ssh.example.com",lnSshPort)
IF (lnSuccess = 0) THEN
    ? loSsh.LastErrorText
    RELEASE loSsh
    CANCEL
ENDIF

*  Normally you would not hard-code the password in source.  You should instead obtain it
*  from an interactive prompt, environment variable, or a secrets vault.
lcPassword = "mySshPassword"

*  Load the SSH private key.  LoadText reads the file's text, which is then imported.
loPrivKey = CreateObject('Chilkat.SshKey')
lcKeyStr = loPrivKey.LoadText("qa_data/id_rsa")
IF (loPrivKey.LastMethodSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loSsh
    RELEASE loPrivKey
    CANCEL
ENDIF

lnSuccess = loPrivKey.FromOpenSshPrivateKey(lcKeyStr)
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loSsh
    RELEASE loPrivKey
    CANCEL
ENDIF

lnSuccess = loSsh.AuthenticatePwPk("mySshLogin",lcPassword,loPrivKey)
IF (lnSuccess = 0) THEN
    ? loSsh.LastErrorText
    RELEASE loSsh
    RELEASE loPrivKey
    CANCEL
ENDIF

? "Authenticated with password and private key."

loSsh.Disconnect()

RELEASE loSsh
RELEASE loPrivKey