Visual FoxPro

Decrypt S/MIME with an Explicit Certificate and Private Key

Loads a CMS/PKCS #7 encrypted S/MIME message and decrypts it back to the original MIME content.

Decrypt2 accepts the certificate and its private key directly as arguments.

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. When the certificate and private key are already loaded as separate objects, Decrypt2 uses them directly rather than searching an internal collection of credential sources.

Chilkat Visual FoxPro Downloads

Download Chilkat for Visual FoxPro

Visual FoxPro

LOCAL lnSuccess
LOCAL loMime
LOCAL loCert
LOCAL loPrivKey
LOCAL lcBody

lnSuccess = 0

loMime = CreateObject('Chilkat.Mime')
lnSuccess = loMime.LoadMimeFile("qa_data/encrypted.eml")
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    CANCEL
ENDIF

*  Decrypt using an explicitly supplied certificate and private key.  The 1st argument is the
*  certificate and the 2nd is its private key.
loCert = CreateObject('Chilkat.Cert')
lnSuccess = loCert.LoadFromFile("qa_data/recipient.cer")
IF (lnSuccess = 0) THEN
    ? loCert.LastErrorText
    RELEASE loMime
    RELEASE loCert
    CANCEL
ENDIF

loPrivKey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loPrivKey.LoadPemFile("qa_data/recipient_privkey.pem")
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loMime
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

lnSuccess = loMime.Decrypt2(loCert,loPrivKey)
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

lcBody = loMime.GetBodyDecoded()
IF (loMime.LastMethodSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

? lcBody

RELEASE loMime
RELEASE loCert
RELEASE loPrivKey