(Visual FoxPro) Export a Certificate's Private Key to Various Formats

Loads a digital certificate and private key from a PFX file (also known as PKCS#12) and exports the private key to various formats: (1) PKCS8 Encrypted, (2) PKCS8 Encrypted PEM, (3) PKCS8 unencrypted, (4) PKCS8 PEM unencrypted, (5) RSA DER unencrypted, (6) RSA PEM unencrypted, (7) XML.

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

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

LOCAL lnSuccess
LOCAL loCert
LOCAL lcPfxFilename
LOCAL lcPfxPassword
LOCAL loPrivKey
LOCAL lcPassword
LOCAL lcPath

lnSuccess = 0

loCert = CreateObject('Chilkat.Cert')

* Load from the PFX file
lcPfxFilename = "/Users/chilkat/testData/pfx/chilkat_ssl_pwd_is_test.pfx"
lcPfxPassword = "test"

* A PFX typically contains certificates in the chain of authentication.
* The Chilkat cert object will choose the certificate w/
* private key farthest from the root authority cert.
* To access all the certificates in a PFX, use the 
* Chilkat certificate store object instead.
lnSuccess = loCert.LoadPfxFile(lcPfxFilename,lcPfxPassword)
IF (lnSuccess = 0) THEN
    ? loCert.LastErrorText
    RELEASE loCert
    CANCEL
ENDIF

* Get the private key...
loPrivKey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loCert.GetPrivateKey(loPrivKey)
IF (lnSuccess = 0) THEN
    ? loCert.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

* Export to various formats:

lcPassword = "secret"

* PKCS8 Encrypted DER
lcPath = "/Users/chilkat/testData/privkeys/chilkat_pkcs8_enc.der"
lnSuccess = loPrivKey.SavePkcs8EncryptedFile(lcPassword,lcPath)
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

* PKCS8 Encrypted PEM
lcPath = "/Users/chilkat/testData/privkeys/chilkat_pkcs8_enc.pem"
lnSuccess = loPrivKey.SavePkcs8EncryptedPemFile(lcPassword,lcPath)
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

* PKCS8 Unencrypted DER
lcPath = "/Users/chilkat/testData/privkeys/chilkat_pkcs8.der"
lnSuccess = loPrivKey.SavePkcs8File(lcPath)
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

* PKCS8 Unencrypted PEM
lcPath = "/Users/chilkat/testData/privkeys/chilkat_pkcs8.pem"
lnSuccess = loPrivKey.SavePkcs8PemFile(lcPath)
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

*  RSA DER (unencrypted)
lcPath = "/Users/chilkat/testData/privkeys/chilkat_rsa.der"
lnSuccess = loPrivKey.SavePkcs1File(lcPath)
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

* RSA PEM (unencrypted)
lcPath = "/Users/chilkat/testData/privkeys/chilkat_rsa.pem"
lnSuccess = loPrivKey.SavePemFile(lcPath)
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

* XML (unencrypted)
lcPath = "/Users/chilkat/testData/privkeys/chilkat.xml"
lnSuccess = loPrivKey.SaveXmlFile(lcPath)
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

? "Private key exported to various formats."

RELEASE loCert
RELEASE loPrivKey