Xbase++

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. Xbase++

LOCAL nSuccess
LOCAL oMime
LOCAL oCert
LOCAL oPrivKey

nSuccess := 0

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

oMime := CreateObject("Chilkat.Mime")

//  Load the certificate from a .cer file.
oCert := CreateObject("Chilkat.Cert")
nSuccess := oCert:LoadFromFile("aaworkarea/myCert.cer")
IF (nSuccess == 0)
    ? oCert:LastErrorText
    oMime:destroy()
    oCert:destroy()
    RETURN
ENDIF

//  Load the private key from an encrypted PEM file.
//  (A private key can be loaded from other file formats also..)
oPrivKey := CreateObject("Chilkat.PrivateKey")
nSuccess := oPrivKey:LoadEncryptedPemFile("aaworkarea/myPrivateKey.pem", "myPassword")
IF (nSuccess == 0)
    ? oPrivKey:LastErrorText
    oMime:destroy()
    oCert:destroy()
    oPrivKey:destroy()
    RETURN
ENDIF

nSuccess := oMime: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.
nSuccess := oMime:ConvertToSignedPk(oCert, oPrivKey)
IF (nSuccess == 0)
    ? oMime:LastErrorText
    oMime:destroy()
    oCert:destroy()
    oPrivKey:destroy()
    RETURN
ENDIF

//  Save the S/MIME to a file.
nSuccess := oMime:SaveMime("aaworkarea/opaqueSignedMime.txt")
IF (nSuccess == 0)
    ? oMime:LastErrorText
    oMime:destroy()
    oCert:destroy()
    oPrivKey:destroy()
    RETURN
ENDIF

? "success!"

oMime:destroy()
oCert:destroy()
oPrivKey:destroy()