(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.

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

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Cert')
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 <> 1) THEN
    ? loCert.LastErrorText
    RELEASE loCert
    CANCEL
ENDIF

* Get the private key...

loPrivKey = loCert.ExportPrivateKey()
IF (loCert.LastMethodSuccess = 0) THEN
    ? loCert.LastErrorText
    RELEASE loCert
    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 <> 1) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    RELEASE loCert
    CANCEL
ENDIF

* PKCS8 Encrypted PEM
lcPath = "/Users/chilkat/testData/privkeys/chilkat_pkcs8_enc.pem"
lnSuccess = loPrivKey.SavePkcs8EncryptedPemFile(lcPassword,lcPath)
IF (lnSuccess <> 1) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    RELEASE loCert
    CANCEL
ENDIF

* PKCS8 Unencrypted DER
lcPath = "/Users/chilkat/testData/privkeys/chilkat_pkcs8.der"
lnSuccess = loPrivKey.SavePkcs8File(lcPath)
IF (lnSuccess <> 1) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    RELEASE loCert
    CANCEL
ENDIF

* PKCS8 Unencrypted PEM
lcPath = "/Users/chilkat/testData/privkeys/chilkat_pkcs8.pem"
lnSuccess = loPrivKey.SavePkcs8PemFile(lcPath)
IF (lnSuccess <> 1) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    RELEASE loCert
    CANCEL
ENDIF

*  RSA DER (unencrypted)
lcPath = "/Users/chilkat/testData/privkeys/chilkat_rsa.der"
lnSuccess = loPrivKey.SavePkcs1File(lcPath)
IF (lnSuccess <> 1) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    RELEASE loCert
    CANCEL
ENDIF

* RSA PEM (unencrypted)
lcPath = "/Users/chilkat/testData/privkeys/chilkat_rsa.pem"
lnSuccess = loPrivKey.SavePemFile(lcPath)
IF (lnSuccess <> 1) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    RELEASE loCert
    CANCEL
ENDIF

* XML (unencrypted)
lcPath = "/Users/chilkat/testData/privkeys/chilkat.xml"
lnSuccess = loPrivKey.SaveXmlFile(lcPath)
IF (lnSuccess <> 1) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    RELEASE loCert
    CANCEL
ENDIF

RELEASE loPrivKey

? "Private key exported to all formats."

RELEASE loCert