DataFlex

SSH Public Key Authentication

See more SSH Examples

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

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoSsh
    String sHostname
    Integer iPort
    Variant vKey
    Handle hoKey
    String sPrivKey
    String sTemp1
    Boolean bTemp1

    Move False To iSuccess

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

    Get Create (RefClass(cComChilkatSsh)) To hoSsh
    If (Not(IsComObjectCreated(hoSsh))) Begin
        Send CreateComObject of hoSsh
    End

    // Set some timeouts, in milliseconds:
    Set ComConnectTimeoutMs Of hoSsh To 5000
    Set ComIdleTimeoutMs Of hoSsh To 15000

    // Connect to the SSH server.  
    // The standard SSH port = 22
    // The hostname may be a hostname or IP address.
    Move "sftp.example.com" To sHostname
    Move 22 To iPort
    Get ComConnect Of hoSsh sHostname iPort To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSsh To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatSshKey)) To hoKey
    If (Not(IsComObjectCreated(hoKey))) Begin
        Send CreateComObject of hoKey
    End

    // 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.)
    Get ComLoadText Of hoKey "myPrivateKey.pem" To sPrivKey
    Get ComLastMethodSuccess Of hoKey To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoKey To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // 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.)
    Get ComFromOpenSshPrivateKey Of hoKey sPrivKey To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoKey To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Authenticate with the SSH server using the login and
    // private key.  (The corresponding public key should've 
    // been installed on the SSH server beforehand.)
    Get pvComObject of hoKey to vKey
    Get ComAuthenticatePk Of hoSsh "myLogin" vKey To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSsh To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComLastErrorText Of hoSsh To sTemp1
    Showln sTemp1
    Showln "Public-Key Authentication Successful!"


End_Procedure