Visual FoxPro

Send Encrypted Email using RSAES-OAEP with AES-128 CBC and SHA256

See more SMTP Examples

Demonstrates 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.

Visual FoxPro

LOCAL lnSuccess
LOCAL loCert
LOCAL loEmail
LOCAL loMailman

lnSuccess = 0

*  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.)
loCert = CreateObject('Chilkat.Cert')
lnSuccess = loCert.LoadFromFile("qa_data/rsaes-oaep/cert.pem")
IF (lnSuccess <> 1) THEN
    ? loCert.LastErrorText
    RELEASE loCert
    CANCEL
ENDIF

loEmail = CreateObject('Chilkat.Email')

*  Create a simple email.
loEmail.Subject = "Sample RSAES-OAEP Encrypted Email"
loEmail.Body = "Sample RSAES-OAEP Encrypted Email"
loEmail.From = "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.)
loEmail.AddTo("Chilkat GMail","chilkat.support@gmail.com")

*  Set the email object properties to indicate the desired encryption.
loEmail.Pkcs7CryptAlg = "aes"
*  If AES-256 is desired, set the following property to 256.
loEmail.Pkcs7KeyLength = 128
loEmail.OaepPadding = 1
*  Other choices for the OAEP hash algorithm are "sha1", "sha384", and "sha512"
loEmail.OaepHash = "sha256"

*  Provide the certificate to be used for encryption
loEmail.AddEncryptCert(loCert)

*  Don't forget to indicate that the email should be encrypted when sent..
loEmail.SendEncrypted = 1

*  The mailman object will do the RSAES-OAEP encryption when sending.
loMailman = CreateObject('Chilkat.MailMan')

*  Set the SMTP settings for your email account on your mail server.
loMailman.SmtpUsername = "SMTP_LOGIN"
loMailman.SmtpPassword = "SMTP_PASSWORD"
loMailman.SmtpHost = "MY_SMTP_DOMAIN_OR_IP"
loMailman.SmtpPort = 587
loMailman.StartTLS = 1

*  Send the email.  The mailman will encrypt the email as directed by the 
*  property settings of the email object.
lnSuccess = loMailman.SendEmail(loEmail)
IF (lnSuccess <> 1) THEN
    ? loMailman.LastErrorText
    RELEASE loCert
    RELEASE loEmail
    RELEASE loMailman
    CANCEL
ENDIF

lnSuccess = loMailman.CloseSmtpConnection()
IF (lnSuccess <> 1) THEN
    ? "Connection to SMTP server not closed cleanly."
ENDIF

? "Mail Sent!"

*  -----------------------------------------------------------
*  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=

RELEASE loCert
RELEASE loEmail
RELEASE loMailman