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(Unicode C) Send Encrypted Email using RSAES-OAEP with AES-128 CBC and SHA256Demonstrates how to send encrypted email using RSAES-OAEP with SHA256 and AES-128 content encryption. Note: This example requires Chilkat v9.5.0.67 or greater.
#include <C_CkCertW.h> #include <C_CkEmailW.h> #include <C_CkMailManW.h> void ChilkatSample(void) { HCkCertW cert; BOOL success; HCkEmailW email; HCkMailManW mailman; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Load an RSA-based certificate. // (Encrypting an email only requires the public key. Decrypting an email requires the private key.) cert = CkCertW_Create(); success = CkCertW_LoadFromFile(cert,L"qa_data/rsaes-oaep/cert.pem"); if (success != TRUE) { wprintf(L"%s\n",CkCertW_lastErrorText(cert)); CkCertW_Dispose(cert); return; } email = CkEmailW_Create(); // Create a simple email. CkEmailW_putSubject(email,L"Sample RSAES-OAEP Encrypted Email"); CkEmailW_putBody(email,L"Sample RSAES-OAEP Encrypted Email"); CkEmailW_putFrom(email,L"support@chilkatsoft.com"); // Add a recipient. // (The email is encrypted using the recipient's certificate. // If sending to multiple recipients, then the AddEncryptCert method would // need to be called once for each recipient's certificate.) CkEmailW_AddTo(email,L"Chilkat GMail",L"chilkat.support@gmail.com"); // Set the email object properties to indicate the desired encryption. CkEmailW_putPkcs7CryptAlg(email,L"aes"); // If AES-256 is desired, set the following property to 256. CkEmailW_putPkcs7KeyLength(email,128); CkEmailW_putOaepPadding(email,TRUE); // Other choices for the OAEP hash algorithm are "sha1", "sha384", and "sha512" CkEmailW_putOaepHash(email,L"sha256"); // Provide the certificate to be used for encryption CkEmailW_AddEncryptCert(email,cert); // Don't forget to indicate that the email should be encrypted when sent.. CkEmailW_putSendEncrypted(email,TRUE); // The mailman object will do the RSAES-OAEP encryption when sending. mailman = CkMailManW_Create(); // Set the SMTP settings for your email account on your mail server. CkMailManW_putSmtpUsername(mailman,L"SMTP_LOGIN"); CkMailManW_putSmtpPassword(mailman,L"SMTP_PASSWORD"); CkMailManW_putSmtpHost(mailman,L"MY_SMTP_DOMAIN_OR_IP"); CkMailManW_putSmtpPort(mailman,587); CkMailManW_putStartTLS(mailman,TRUE); // Send the email. The mailman will encrypt the email as directed by the // property settings of the email object. success = CkMailManW_SendEmail(mailman,email); if (success != TRUE) { wprintf(L"%s\n",CkMailManW_lastErrorText(mailman)); CkCertW_Dispose(cert); CkEmailW_Dispose(email); CkMailManW_Dispose(mailman); return; } success = CkMailManW_CloseSmtpConnection(mailman); if (success != TRUE) { wprintf(L"Connection to SMTP server not closed cleanly.\n"); } wprintf(L"Mail Sent!\n"); // ----------------------------------------------------------- // This is an example of an RSAES-OAEP encrypted email // ----------------------------------------------------------- // MIME-Version: 1.0 // Date: Thu, 27 Apr 2017 08:43:32 -0500 // Message-ID: <772DC039F0259C474BAC60240EA2BA2272402308@CHILKAT13> // Content-Type: application/pkcs7-mime; name="smime.p7m"; smime-type="enveloped-data" // Content-Transfer-Encoding: base64 // X-Priority: 3 (Normal) // Subject: Sample RSAES-OAEP Encrypted Email // From: support@chilkatsoft.com // To: "Chilkat GMail" <chilkat.support@gmail.com> // Content-Disposition: attachment; filename="smime.p7m" // // MIICWQYJKoZIhvcNAQcDoIICSjCCAkYCAQAxggGgMIIBnAIBADB1MGgxCzAJBgNVBAYTAlVTMQsw // CQYDVQQIDAJJTDEQMA4GA1UEBwwHV2hlYXRvbjEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQ // dHkgTHRkMRcwFQYDVQQDDA5DaGlsa2F0V2lkZ2V0cwIJAMRwugDmvniwMBwGCSqGSIb3DQEBBzAP // oA0wCwYJYIZIAWUDBAIBBIIBABr0E1dKJjK0FAYRz/NCtJmBeB0nUxgcuBnhGPI/UeyGub3cCo+K // G5F4/iVTBJqVvYIF5+fvBnyTginwv7OiUiFWLyihiFC3NIyZJO22+XMHpNatCffTPZk10WswkTgk // G3ApnRvGQAaldnFD0Hs8drPU4vBvY9QsjT7YDGa6u2NMX+sr1ewEZArqU0mNfJ6RsEYd5FQbFEVF // qLmnz8Dt+yhoJlUtfUd8TXIeqHRJ7RxKOTSzlBZaAdTv2QX4oL9IcAgZeTg5iw+yRPkSAwWyg+I/ // 7fybLsUpRGDHTGUU+AvHvP0kYKa1mkvccBVEC/+4hEyhpS1tWIR5ByY6vM76Z+8wgZwGCSqGSIb3 // DQEHATAdBglghkgBZQMEAQIEEKqD0YDHX1NsVDaV32UczpeAcLteQyRPTV4hATjwcPiVelPfeWNs // xZKRGaEBqLM8+Y+V4ciCFoOlgJuOcP4m1PTHyilfzd+SCsKz5l1C7+sfPf36n2aacX6IWga59Bz5 // QbWrOHDUT7O5PnGwKVgQFw3Cj4GrdPGWKcoqxB0HuKnj3WA= CkCertW_Dispose(cert); CkEmailW_Dispose(email); CkMailManW_Dispose(mailman); } |
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