(Unicode C++) Send Encrypted Email using Certificate in Apple Keychain

See more Apple Keychain Examples

Send encrypted (S/MIME) email using a certificate found in the Apple Keychain.

Note: This example requires Chilkat v10.1.2 or later.

Chilkat C/C++ Library Downloads
MS Visual C/C++ C++ Builder Linux C/C++ Alpine Linux C/C++	MacOS C/C++ iOS C/C++ Android C/C++ MinGW C/C++

#include <CkEmailW.h>
#include <CkCertW.h>
#include <CkMailManW.h>
#include <CkSecretsW.h>
#include <CkJsonObjectW.h>

void ChilkatSample(void)
    {
    CkEmailW email;
    email.put_Subject(L"This email is encrypted");
    email.put_Body(L"This is a S/MIME encrypted mail");
    email.put_From(L"Joe <joe@example.com>");

    // Emails are encrypted using the recipient's certificate.
    const wchar_t *recipientEmailAddr = L"jane@example2.com";
    email.AddTo(L"",recipientEmailAddr);

    // Indicate that the email is to be sent encrypted.
    email.put_SendEncrypted(true);

    CkCertW cert;

    // -----------------------------------------------
    // This example requires Chilkat v10.1.2 or later.
    // -----------------------------------------------

    // The recipient's certificate is used to encrypt.
    // This will load the certificate from the Apple Keychain.
    bool success = cert.LoadByEmailAddress(recipientEmailAddr);
    if (success != true) {
        wprintf(L"%s\n",cert.lastErrorText());
        return;
    }

    // Specify the certificate to be used for encryption.
    success = email.SetEncryptCert(cert);
    email.put_SendEncrypted(true);

    CkMailManW mailman;
    mailman.put_SmtpHost(L"smtp.example.com");
    mailman.put_SmtpUsername(L"joe@example.com");
    mailman.put_SmtpPort(587);
    mailman.put_StartTLS(true);

    // We'll get the SMTP password from the Apple Keychain.
    // See how we originally saved the email credentials to the Keychain here:
    // Save Email Credentials in Apple Keychain or Windows Credentials Manager
    CkSecretsW secrets;

    // On Windows, this is the Windows Credentials Manager
    // On MacOS/iOS, it is the Apple Keychain
    secrets.put_Location(L"local_manager");

    // Specify the name of the secret.
    // service and username are required.
    // appName and domain are optional.
    // Note: The values are arbitrary and can be anything you want.
    CkJsonObjectW json;
    json.UpdateString(L"appName",L"MyEmailApp");
    json.UpdateString(L"service",L"SMTP");
    json.UpdateString(L"domain",L"example.com");
    json.UpdateString(L"username",L"joe@example.com");

    mailman.put_SmtpPassword(secrets.getSecretStr(json));

    // Send the encrypted email.
    // The email is encrypted and sent within the SendEmail function.
    success = mailman.SendEmail(email);
    if (success != true) {
        wprintf(L"%s\n",mailman.lastErrorText());
        return;
    }

    wprintf(L"Encrypted email sent!\n");
    }