Visual FoxPro

Decrypt S/MIME using a PFX File

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

DecryptUsingPfxFile decrypts using the certificates and private keys contained in a PFX/P12 file, identified by path and password.

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. A PFX/P12 file bundles a certificate with its private key. DecryptUsingPfxFile opens the file, locates the key matching the encrypted message, and recovers the original MIME.

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Visual FoxPro

LOCAL lnSuccess
LOCAL loMime
LOCAL lcPfxPassword
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 the certificates and private keys in a PFX/P12 file.  The 1st argument is the PFX
*  path and the 2nd is its password (which should come from a secure source).
lcPfxPassword = "myPfxPassword"
lnSuccess = loMime.DecryptUsingPfxFile("qa_data/recipient.pfx",lcPfxPassword)
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    CANCEL
ENDIF

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

? lcBody

RELEASE loMime