Java

Send Encrypted Email with a Selected Algorithm (AES, 3DES, etc.)

Sends an encrypted email using the recipient's digital certificate from a .cer file, and chooses 3DES for the encryption algorithm. (It is also possible to send AES encrypted email w/ 128-bit, 192-bit, or 256-bit encryption simply by setting the Pkcs7CryptAlg and Pkcs7KeyLength properties.) Chilkat2 Java

import com.chilkatsoft.chilkat2.Cert;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Email;
import com.chilkatsoft.chilkat2.MailMan;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // The mailman object is used for sending and receiving email.
        MailMan mailman = new MailMan();

        // Set the SMTP server.
        mailman.setSmtpHost("smtp.mymailserver.com");

        // Load the .cer file into a certificate object.
        // When sending S/MIME encrypted email, it is the recipient's
        // certificate that is used for encryption.  Only the public key
        // is needed to encrypt.  The recipient is the only
        // one possessing the private key, and therefore is the only
        // one able to decrypt.
        Cert cert = new Cert();
        try {
            cert.loadFromFile("cknotes.cer");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Create a new email object
        Email email = new Email();

        email.setSubject("This email is encrypted");
        email.setBody("This is a digitally encrypted mail");
        email.setFrom("Chilkat Support <support@chilkatsoft.com>");
        email.addTo("Chilkat Blog", "admin@cknotes.com");

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

        // Specify the certificate to be used for encryption.
        email.setEncryptCert(cert);

        // If desired, specify the encryption algorithm to be used.
        // The Pkcs7CryptAlg property can be set to "aes", "des", "3des", or "rc2"
        email.setPkcs7CryptAlg("3des");

        // If desired, set the key length (in bits) for the encryption algorithm:
        // The possible values allowed depend on the Pkcs7CryptAlg property.
        // For "aes", the key length may be 128, 192, or 256.
        // For "3des" the key length must be 192.
        // For "des" the key length must be 40.
        // For "rc2" the key length can be 40, 56, 64, or 128.
        email.setPkcs7KeyLength(192);

        try {
            mailman.sendEmail(email);
            System.out.println("Mail Sent!");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
        }
    }
}