Java

Send aes-gcm authEnvelopedData Encrypted Email

See more SMTP Examples

Note: This example requires Chilkat v10.0.0 or later

Demonstrates how to send encrypted email using 128-bit AES in GCM mode.

"AES-GCM" (Advanced Encryption Standard - Galois/Counter Mode) is a cryptographic algorithm that provides both encryption and integrity protection (authentication). When used in the context of email security with "authEnvelopedData", it often refers to a method of securely sending encrypted and authenticated email content.

Here’s a brief breakdown:

• AES-GCM: Combines symmetric encryption (AES) with authentication, ensuring both the confidentiality and integrity of the message. It generates an authentication tag to detect any unauthorized changes.
• authEnvelopedData: Refers to a type of structure used in secure email protocols (like S/MIME) to package encrypted content. It contains the encrypted data and associated encrypted session keys.
• Email Security: When applied to emails, AES-GCM ensures the email content is encrypted (confidential) and also tamper-resistant (authenticated), with the encryption keys typically shared securely using asymmetric encryption (e.g., public key infrastructure, or PKI).

In short, AES-GCM with "authEnvelopedData" provides a way to encrypt and authenticate emails, making them confidential and resistant to tampering.

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();

        mailman.setSmtpHost("smtp.example.com");

        mailman.setSmtpUsername("my_smtp_login");
        mailman.setSmtpPassword("my_smtp_password");

        // The typical SMTP ports are 465 for implicit SSL/TLS or 587 for explicit SSL/TLS
        mailman.setSmtpPort(465);
        mailman.setSmtpSsl(true);

        // Use the recipient's certificate for encryption.
        Cert cert = new Cert();
        try {
            cert.loadFromFile("c:/someDir/recipient_cert.cer");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        Email email = new Email();

        email.setSubject("This email is encrypted");
        email.setBody("This is AES-GCM encrypted mail");
        email.setFrom("Mary <mary@example1.com>");
        email.addTo("Joe", "joe@example.com");

        // Specify that AES-GCM w/ authEnvelopedData is to be used.
        // Also specify other params..
        email.setPkcs7CryptAlg("aes-gcm");
        email.setPkcs7KeyLength(128);
        email.setOaepPadding(true);
        email.setOaepHash("sha256");
        email.setOaepMgfHash("sha256");

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

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

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