Signs and encrypts an e-mail message.

Parameters

message

The original e-mail message to be signed and encrypted.

signingCert

The certificate to be used for signing the message. This certificate must contain a private key.

encryptionCerts

The collection of public certificates of all the recipients of the message.

Return Value

A reference to the signed and encrypted message if the signing and encryption went successfully; a reference to the original message if it was already signed and encrypted; a null reference (Nothing in Visual Basic) if the signing or encryption failed.

Remarks

See Sign and Encrypt topics for details on signing and encryption process.

Exceptions

Example

This sample signs and encrypts a message.

[C#]
// To use the code below, import these namespace at the top of your code
using System;
using MailBee;
using MailBee.Mime;
using MailBee.Security;

// The actual code (put it into a method of your class)

// Load the message from file.
MailMessage msg = new MailMessage();
msg.LoadMessage(@"C:\Temp\original.eml");

Smime objSmime = new Smime();

try
{
    // Search for the sender certificate in the system certificate store.
    CertificateStore myStore = new CertificateStore(CertificateStore.Personal, CertStoreType.System, null);
    CertificateCollection signingCerts = myStore.FindCertificates("user@afterlogic.com", CertificateFields.EmailAddress);
    Certificate signingCert = null;
    if (signingCerts.Count > 0) signingCert = signingCerts[0];
    // Get the recipients certificates from the the system certificate store.
    CertificateCollection encryptionCerts = new CertificateStore(CertificateStore.OtherPeople, CertStoreType.System, null).GetAllCertificates();
    // Sign and encrypt the message.
    MailMessage signEncMsg = objSmime.SignAndEncrypt(msg, signingCert, encryptionCerts);
    // Save the resulting message.
    signEncMsg.SaveMessage(@"C:\Temp\result.eml");
}
catch (MailBeeException ex)
{
    Console.WriteLine(ex.Message);
}

[Visual Basic]
' To use the code below, import MailBee namespace at the top of your code
Imports MailBee
Imports MailBee.Mime
Imports MailBee.Security

' The actual code (put it into a method of your class)

' Load the message from file.
Dim msg As MailMessage = New MailMessage
msg.LoadMessage("C:\Temp\original.eml")

Dim objSmime As Smime = New Smime

Try
    ' Search for the sender certificate in the system certificate store.
    Dim myStore As CertificateStore = New CertificateStore(CertificateStore.Personal, CertStoreType.System, Nothing)
    Dim signingCerts As CertificateCollection = myStore.FindCertificates("user@afterlogic.com", CertificateFields.EmailAddress)
    Dim signingCert As Certificate = Nothing
    If (signingCerts.Count > 0) Then
        signingCert = signingCerts(0)
    End If
    ' Get the recipients certificates from the the system certificate store.
    Dim encryptionCerts As CertificateCollection = New CertificateStore(CertificateStore.OtherPeople, CertStoreType.System, Nothing).GetAllCertificates()
    ' Sign and encrypt the message.
    Dim signEncMsg As MailMessage = objSmime.SignAndEncrypt(msg, signingCert, encryptionCerts)
    ' Save the resulting message.
    signEncMsg.SaveMessage("C:\Temp\result.eml")
Catch ex As MailBeeException
    Console.WriteLine(ex.Message)
End Try

See Also

Smime Class | MailBee.Security Namespace | Sign | Encrypt

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