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(MFC) 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.)
#include <CkMailMan.h> #include <CkCert.h> #include <CkEmail.h> void ChilkatSample(void) { CkString strOut; // 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. CkMailMan mailman; // Set the SMTP server. mailman.put_SmtpHost("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. CkCert cert; bool success = cert.LoadFromFile("cknotes.cer"); if (success != true) { strOut.append(cert.lastErrorText()); strOut.append("\r\n"); SetDlgItemText(IDC_EDIT1,strOut.getUnicode()); return; } // Create a new email object CkEmail email; email.put_Subject("This email is encrypted"); email.put_Body("This is a digitally encrypted mail"); email.put_From("Chilkat Support <support@chilkatsoft.com>"); success = email.AddTo("Chilkat Blog","admin@cknotes.com"); // Indicate that the email is to be sent encrypted. email.put_SendEncrypted(true); // Specify the certificate to be used for encryption. success = 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.put_Pkcs7CryptAlg("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.put_Pkcs7KeyLength(192); success = mailman.SendEmail(email); if (success != true) { strOut.append(mailman.lastErrorText()); strOut.append("\r\n"); } else { strOut.append("Mail Sent!"); strOut.append("\r\n"); } SetDlgItemText(IDC_EDIT1,strOut.getUnicode()); } |
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