DataFlex

DSA Generate Key

See more DSA Examples

Generates a DSA public/private key pair and saves to PEM and DER file formats (both encrypted and non-encrypted).

An encrypted DSA PEM looks like this:

-----BEGIN DSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,9DAFD5C4CD62A5D0

QwDdp66sB0qKXQli7FbVcKL/eo3wu7kGRlV2sI8XbkNa1RTLiwnwTWDB0dqyWRQ8
...
Bx0HVfxKiNgCbL6BQEnYD+GOmMcckuj9Uhgloe/YuXCIDJBGhjUt/li3hvR/PXeC

V2xxNl1XKBE88njqi+UXt4vjGVNLpvXM
-----END DSA PRIVATE KEY-----

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoDsa
    String sPemStr
    String sXmlStr
    Boolean iBPublicOnly
    String sTemp1

    Move False To iSuccess

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

    Get Create (RefClass(cComChilkatDsa)) To hoDsa
    If (Not(IsComObjectCreated(hoDsa))) Begin
        Send CreateComObject of hoDsa
    End

    // Call GenKey to generate a new DSA key.
    // The number of bits should be at least 1024 and a multiple
    // of 64.   Typical values are either 1024 or 2048.
    // DSA key generation is compute intensive and may take
    // a short while to complete.
    Get ComGenKey Of hoDsa 2048 To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoDsa To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Extract the private and public parts to PEM or DER format
    // and save to files...

    // First for the public key...
    // The public key never needs to be encrypted.

    // Save the public key in PEM format:
    Get ComToPublicPem Of hoDsa To sPemStr
    // This example will not check the return value of SaveText...
    Get ComSaveText Of hoDsa sPemStr "dsa_pub.pem" To iSuccess

    // Save the public key in DER format:
    Get ComToPublicDerFile Of hoDsa "dsa_pub.der" To iSuccess

    Move True To iBPublicOnly
    // Save to XML
    Get ComToXml Of hoDsa iBPublicOnly To sXmlStr
    Get ComSaveText Of hoDsa sXmlStr "dsa_pub.xml" To iSuccess

    // ------------------------------------
    // Now for the private key....
    // ------------------------------------

    // Unencrypted PEM:
    Get ComToPem Of hoDsa To sPemStr
    Get ComSaveText Of hoDsa sPemStr "dsa_priv.pem" To iSuccess

    // Encrypted PEM:
    Get ComToEncryptedPem Of hoDsa "myPassword" To sPemStr
    Get ComSaveText Of hoDsa sPemStr "dsa_privEncrypted.pem" To iSuccess

    // DER:
    Get ComToDerFile Of hoDsa "dsa_priv.der" To iSuccess

    // XML:
    Move False To iBPublicOnly
    Get ComToXml Of hoDsa iBPublicOnly To sXmlStr
    Get ComSaveText Of hoDsa sXmlStr "dsa_priv.xml" To iSuccess

    Showln "Finished!"


End_Procedure