C++

Load .eml and Decrypt (smime.p7m)

Loads an encrypted email from a .eml file and decrypts using certificate w/ private key found in a .p12 (or .pfx) file.

The Content-Type and Content-Disposition email headers of the email to be decrypted look similar to this:

Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data;
	name="smime.p7m"
Content-Disposition: attachment; filename="smime.p7m"

C++

#include <CkEmail.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkEmail email;

    //  Add a PFX (or .p12) to be used for decryption
    success = email.AddPfxSourceFile("myCert.p12","passwordForP12");
    if (success != true) {
        std::cout << email.lastErrorText() << "\r\n";
        return;
    }

    //  Loading the .eml automatically decrypts.
    success = email.LoadEml("encrypted.eml");
    if (success != true) {
        std::cout << email.lastErrorText() << "\r\n";
        return;
    }

    //  The email now exists as it was prior to encryption.
    //  Your app may access the email's subject, body, attachments,
    //  etc. using the Chilkat Email API...

    //  Save the decrypted email:
    success = email.SaveEml("decrypted.eml");
    if (success != true) {
        std::cout << email.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Success." << "\r\n";
    }