(Visual FoxPro) 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

LOCAL lnSuccess
LOCAL loRsa
LOCAL loPrivKey
LOCAL loPubKey
LOCAL lnBChoosePkcs1
LOCAL lcPubKeyBase64Der
LOCAL lcPrivKeyPkcs1
LOCAL lcPrivKeyPkcs8

lnSuccess = 0

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

loRsa = CreateObject('Chilkat.Rsa')

* Generate a 2048-bit key.
loPrivKey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loRsa.GenKey(2048,loPrivKey)
IF (lnSuccess = 0) THEN
    ? loRsa.LastErrorText
    RELEASE loRsa
    RELEASE loPrivKey
    CANCEL
ENDIF

* Get the public part of the key.
loPubKey = CreateObject('Chilkat.PublicKey')
loPrivKey.ToPublicKey(loPubKey)

* 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 1 or 0.
lnBChoosePkcs1 = 1
lcPubKeyBase64Der = loPubKey.GetEncoded(lnBChoosePkcs1,"base64")
? "Public Key Base64 DER:"
? lcPubKeyBase64Der

* Get the private key as Base64 DER:
* We can get PKCS1 or PKCS8, but with different methods:
lcPrivKeyPkcs1 = loPrivKey.GetPkcs1ENC("base64")
? "Private Key PKCS1 Base64 DER:"
? lcPrivKeyPkcs1

lcPrivKeyPkcs8 = loPrivKey.GetPkcs8ENC("base64")
? "Private Key PKCS8 Base64 DER:"
? lcPrivKeyPkcs8

RELEASE loRsa
RELEASE loPrivKey
RELEASE loPubKey