(DataFlex) Generate an RSA Key and Get as Base64 DER

Demonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoRsa
    Variant vPrivKey
    Handle hoPrivKey
    Variant vPubKey
    Handle hoPubKey
    Boolean iBChoosePkcs1
    String sPubKeyBase64Der
    String sPrivKeyPkcs1
    String sPrivKeyPkcs8
    String sTemp1

    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(cComChilkatRsa)) To hoRsa
    If (Not(IsComObjectCreated(hoRsa))) Begin
        Send CreateComObject of hoRsa
    End

    // Generate a 2048-bit key.
    Get Create (RefClass(cComChilkatPrivateKey)) To hoPrivKey
    If (Not(IsComObjectCreated(hoPrivKey))) Begin
        Send CreateComObject of hoPrivKey
    End
    Get pvComObject of hoPrivKey to vPrivKey
    Get ComGenKey Of hoRsa 2048 vPrivKey To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoRsa To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Get the public part of the key.
    Get Create (RefClass(cComChilkatPublicKey)) To hoPubKey
    If (Not(IsComObjectCreated(hoPubKey))) Begin
        Send CreateComObject of hoPubKey
    End
    Get pvComObject of hoPubKey to vPubKey
    Get ComToPublicKey Of hoPrivKey vPubKey To iSuccess

    // There are two possible formats for representing the RSA public key 
    // in ASN.1 (DER).  The possible formats are PKCS1 and PKCS8.
    // We can get either by setting bChoosePkcs1 to True or False.
    Move True To iBChoosePkcs1
    Get ComGetEncoded Of hoPubKey iBChoosePkcs1 "base64" To sPubKeyBase64Der
    Showln "Public Key Base64 DER:"
    Showln sPubKeyBase64Der

    // Get the private key as Base64 DER:
    // We can get PKCS1 or PKCS8, but with different methods:
    Get ComGetPkcs1ENC Of hoPrivKey "base64" To sPrivKeyPkcs1
    Showln "Private Key PKCS1 Base64 DER:"
    Showln sPrivKeyPkcs1

    Get ComGetPkcs8ENC Of hoPrivKey "base64" To sPrivKeyPkcs8
    Showln "Private Key PKCS8 Base64 DER:"
    Showln sPrivKeyPkcs8


End_Procedure