Encrypt MIME for Multiple Recipients

See more MIME Examples

Demonstrates encrypting the current MIME entity for several recipients at once. A certificate is added for each recipient with AddEncryptCert, and EncryptN then produces a single CMS/PKCS #7 message that each recipient can independently decrypt.

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.

#include <CkMime.h>
#include <CkCert.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkMime mime;
    success = mime.SetBodyFromPlainText("This message will be encrypted.");
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    //  Add a certificate for each intended recipient.  Every recipient receives an independently
    //  wrapped copy of the message key.
    CkCert cert1;
    success = cert1.LoadFromFile("qa_data/recipient1.cer");
    if (success == false) {
        std::cout << cert1.lastErrorText() << "\r\n";
        return;
    }

    success = mime.AddEncryptCert(cert1);
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    CkCert cert2;
    success = cert2.LoadFromFile("qa_data/recipient2.cer");
    if (success == false) {
        std::cout << cert2.lastErrorText() << "\r\n";
        return;
    }

    success = mime.AddEncryptCert(cert2);
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    //  Encrypt for every added recipient at once.
    success = mime.EncryptN();
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    success = mime.SaveMime("qa_output/encrypted_multi.eml");
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Message encrypted for multiple recipients." << "\r\n";
    }