Visual FoxPro

ConvertToSignedPk

See more MIME Examples

Demonstrates how to digitally sign MIME to create an "opaque" signature. The MIME is converted to an application/x-pkcs7-mime which is a PKCS7 signature that includes both the original MIME message and the signature. This is different than AddDetachedSignaturePk, where the signature is appended to the MIME. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key. Visual FoxPro

LOCAL lnSuccess
LOCAL loMime
LOCAL loCert
LOCAL loPrivKey

lnSuccess = 0

* This example assumes the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

loMime = CreateObject('Chilkat.Mime')

* Load the certificate from a .cer file.
loCert = CreateObject('Chilkat.Cert')
lnSuccess = loCert.LoadFromFile("aaworkarea/myCert.cer")
IF (lnSuccess = 0) THEN
    ? loCert.LastErrorText
    RELEASE loMime
    RELEASE loCert
    CANCEL
ENDIF

* Load the private key from an encrypted PEM file.
* (A private key can be loaded from other file formats also..)
loPrivKey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loPrivKey.LoadEncryptedPemFile("aaworkarea/myPrivateKey.pem","myPassword")
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loMime
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

lnSuccess = loMime.SetBodyFromPlainText("This is the plain-text MIME body.")

* Convert the MIME to application/x-pkcs7-mime, which
* is PKCS7 containing both the original content and the signature.
lnSuccess = loMime.ConvertToSignedPk(loCert,loPrivKey)
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

* Save the S/MIME to a file.
lnSuccess = loMime.SaveMime("aaworkarea/opaqueSignedMime.txt")
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

? "success!"

RELEASE loMime
RELEASE loCert
RELEASE loPrivKey