PureBasic

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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IncludeFile "CkSsh.pb"
IncludeFile "CkSshKey.pb"

Procedure ChilkatExample()

    success.i = 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.

    ssh.i = CkSsh::ckCreate()
    If ssh.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ;  Connect to the SSH server.  Port 22 is the usual SSH port.
    sshPort.i = 22
    success = CkSsh::ckConnect(ssh,"ssh.example.com",sshPort)
    If success = 0
        Debug CkSsh::ckLastErrorText(ssh)
        CkSsh::ckDispose(ssh)
        ProcedureReturn
    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.
    password.s = "mySshPassword"

    ;  Load the SSH private key.  LoadText reads the file's text, which is then imported.
    privKey.i = CkSshKey::ckCreate()
    If privKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    keyStr.s = CkSshKey::ckLoadText(privKey,"qa_data/id_rsa")
    If CkSshKey::ckLastMethodSuccess(privKey) = 0
        Debug CkSshKey::ckLastErrorText(privKey)
        CkSsh::ckDispose(ssh)
        CkSshKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    success = CkSshKey::ckFromOpenSshPrivateKey(privKey,keyStr)
    If success = 0
        Debug CkSshKey::ckLastErrorText(privKey)
        CkSsh::ckDispose(ssh)
        CkSshKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    success = CkSsh::ckAuthenticatePwPk(ssh,"mySshLogin",password,privKey)
    If success = 0
        Debug CkSsh::ckLastErrorText(ssh)
        CkSsh::ckDispose(ssh)
        CkSshKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    Debug "Authenticated with password and private key."

    CkSsh::ckDisconnect(ssh)


    CkSsh::ckDispose(ssh)
    CkSshKey::ckDispose(privKey)


    ProcedureReturn
EndProcedure