Visual FoxPro

Export an Encrypted PKCS #8 Private Key as Encoded Text

Demonstrates the Chilkat PrivateKey.GetPkcs8EncryptedENC method, which exports the key as password-protected PKCS #8 DER and encodes the encrypted DER as text. The first argument names the binary encoding and the second is the password. The cipher is selected by Pkcs8EncryptAlg.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This combines encryption with text encoding: the key is protected by a passphrase and returned as a string, ideal for storing an encrypted key in a text-only medium such as JSON or an environment variable. It is the encrypted counterpart to GetPkcs8ENC. Source the password securely.

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LOCAL lnSuccess
LOCAL loPrivKey
LOCAL lcPassword
LOCAL lcEncoded

lnSuccess = 0

*  Load a private key to export.
loPrivKey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loPrivKey.LoadPemFile("qa_data/private.pem")
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    CANCEL
ENDIF

*  The key password is not hard-coded in a real application; obtain it from an interactive
*  prompt, environment variable, or a secrets vault.
lcPassword = "myKeyPassword"

*  Export as password-protected PKCS #8 DER, then encode the encrypted DER as text.  The 1st
*  argument names the binary encoding and the 2nd is the password.  The cipher is selected by the
*  Pkcs8EncryptAlg property.
lcEncoded = loPrivKey.GetPkcs8EncryptedENC("base64",lcPassword)
IF (loPrivKey.LastMethodSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    CANCEL
ENDIF

? lcEncoded

RELEASE loPrivKey