SQL Server

SSH Authenticate using Smart Card Private Key

See more SSH Examples

Demonstrates how to use a private key stored on an HSM (smartcard or token) for SSH public-key authentication. (Public-key authentication means the client, which is your application, uses the private key, while the corresponding public key is installed on the server under your SSH account.)

Note: This example requires Chilkat v9.5.0.96 or later.

SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    -- Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

    DECLARE @pkcs11 int
    EXEC @hr = sp_OACreate 'Chilkat.Pkcs11', @pkcs11 OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Use the PKCS11 driver (.dll, .so, .dylib) for your particular HSM.
    -- For example:
    EXEC sp_OASetProperty @pkcs11, 'SharedLibPath', 'C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS11.dll'

    -- Use your HSM's PIN.
    DECLARE @pin nvarchar(4000)
    SELECT @pin = '0000'

    -- Normal user = 1
    DECLARE @userType int
    SELECT @userType = 1

    -- Establish a logged-on user session with the HSM.
    EXEC sp_OAMethod @pkcs11, 'QuickSession', @success OUT, @userType, @pin
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pkcs11, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkcs11
        RETURN
      END

    -- Provide a template to find a PKCS11 object.
    DECLARE @jsonTemplate int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonTemplate OUT

    -- Find an RSA private key with the label "MySshKey".
    -- Here's an example of how the key was originally imported: 
    -- PKCS11 Import SSH Key
    EXEC sp_OAMethod @jsonTemplate, 'UpdateString', @success OUT, 'class', 'private_key'
    EXEC sp_OAMethod @jsonTemplate, 'UpdateString', @success OUT, 'key_type', 'rsa'
    EXEC sp_OAMethod @jsonTemplate, 'UpdateString', @success OUT, 'label', 'MySshKey'

    DECLARE @privKeyHandle int
    EXEC sp_OAMethod @pkcs11, 'FindObject', @privKeyHandle OUT, @jsonTemplate
    IF @privKeyHandle = 0
      BEGIN
        EXEC sp_OAGetProperty @pkcs11, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkcs11
        EXEC @hr = sp_OADestroy @jsonTemplate
        RETURN
      END

    -- The private key handle is only valid during the PKCS11 session.
    -- If you wish to use the private key in another PKCS11 session,
    -- you'll first need to find it.  See:  

    PRINT 'private key handle: ' + @privKeyHandle

    -- We'll also need the PKCS11 public key handle
    -- Modify the template by updating the "class" to "public_key"
    EXEC sp_OAMethod @jsonTemplate, 'UpdateString', @success OUT, 'class', 'public_key'

    DECLARE @pubKeyHandle int
    EXEC sp_OAMethod @pkcs11, 'FindObject', @pubKeyHandle OUT, @jsonTemplate
    IF @pubKeyHandle = 0
      BEGIN
        EXEC sp_OAGetProperty @pkcs11, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkcs11
        EXEC @hr = sp_OADestroy @jsonTemplate
        RETURN
      END


    PRINT 'public key handle: ' + @pubKeyHandle

    -- Create an empty SSH key object, and tell it to use the PKCS11 handles.
    -- We also need to indicate the key type.
    DECLARE @sshKey int
    EXEC @hr = sp_OACreate 'Chilkat.SshKey', @sshKey OUT

    EXEC sp_OAMethod @sshKey, 'UsePkcs11', @success OUT, @pkcs11, @privKeyHandle, @pubKeyHandle, 'rsa'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @sshKey, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkcs11
        EXEC @hr = sp_OADestroy @jsonTemplate
        EXEC @hr = sp_OADestroy @sshKey
        RETURN
      END

    -- Create an SSH object and authenticate using the SSH key, which will utilize the existing PKCS11 session.
    DECLARE @ssh int
    EXEC @hr = sp_OACreate 'Chilkat.Ssh', @ssh OUT

    EXEC sp_OAMethod @ssh, 'Connect', @success OUT, 'my-ssh-server.com', 22
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @ssh, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkcs11
        EXEC @hr = sp_OADestroy @jsonTemplate
        EXEC @hr = sp_OADestroy @sshKey
        EXEC @hr = sp_OADestroy @ssh
        RETURN
      END

    -- This is where the PKCS11 private key on the smart card is used.
    EXEC sp_OAMethod @ssh, 'AuthenticatePk', @success OUT, 'your_ssh_username', @sshKey
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @ssh, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkcs11
        EXEC @hr = sp_OADestroy @jsonTemplate
        EXEC @hr = sp_OADestroy @sshKey
        EXEC @hr = sp_OADestroy @ssh
        RETURN
      END

    -- Do whatever it is your app needs to do using the authenticated SSH session....
    -- ...
    -- ...

    EXEC sp_OAMethod @ssh, 'Disconnect', NULL

    EXEC sp_OAMethod @pkcs11, 'Logout', @success OUT
    EXEC sp_OAMethod @pkcs11, 'CloseSession', @success OUT

    EXEC @hr = sp_OADestroy @pkcs11
    EXEC @hr = sp_OADestroy @jsonTemplate
    EXEC @hr = sp_OADestroy @sshKey
    EXEC @hr = sp_OADestroy @ssh


END
GO