Certificate Class

Provides properties and methods for associating digital certificate with an e-mail address. This object is obsoleted, use X509Certificate2 instead.

System.Object
    EASendMail.Certificate

[Visual Basic]
Public Class Certificate

[C#]
public class Certificate

[C++]
public ref class Certificate

[JScript]
public class Certificate

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Public Constructors

Public Properties

Public Methods

Remarks

Example

[Visual Basic, C#] The following example demonstrates how to load certificate to sign email content with EASendMail SMTP Component. To get the full samples of EASendMail, please refer to Samples section.

[VB - Sign Email with Certificate]

Try
    Dim oMail As SmtpMail = New SmtpMail("TryIt")
    oMail.From = New MailAddress("test@emailarchitect.net")

    ' Find certificate by email adddress in My Personal Store. 
    ' The certificate can be imported by *.pfx file like this: 
    ' oMail.From.Certificate.Load("c:\test.pfx", "pfxpassword", Certificate.CertificateKeyLocation.CRYPT_USER_KEYSET) 
    ' Once the certificate is loaded to From, the email content will be signed automatically

    oMail.From.Certificate.FindSubject(oMail.From.Address,
        Certificate.CertificateStoreLocation.CERT_SYSTEM_STORE_CURRENT_USER,
        "My")

Catch exp As Exception
    Console.WriteLine("No sign certificate found for sender email: {0}", exp.Message)
End Try


[C# - Sign Email with Certificate]

try
{
    SmtpMail oMail = new SmtpMail("TryIt");
    oMail.From = "test@adminsystem.com";

    // Find certificate by email adddress in My Personal Store. 
    // The certificate can be also imported by *.pfx file like this: 
    // oMail.From.Certificate.Load("c:\\test.pfx", "pfxpassword", Certificate.CertificateKeyLocation.CRYPT_USER_KEYSET); 
    // Once the certificate is loaded to From, the email content will be signed automatically

    oMail.From.Certificate.FindSubject(oMail.From.Address,
        Certificate.CertificateStoreLocation.CERT_SYSTEM_STORE_CURRENT_USER,
        "My");
}
catch (Exception exp)
{
    Console.WriteLine("No sign certificate found {0}", exp.Message);
}


[VB - Encrypt Email]

Dim oMail As SmtpMail = New SmtpMail("TryIt")
oMail.From = New MailAddress("test@adminsystem.com")
oMail.To = New AddressCollection("encrypt1@adminsystem.com, encrypt2@adminsystem.com")

For i As Integer = 0 To oMail.To.Count - 1
    Dim recipient As MailAddress = oMail.To(i)
    Try
        ' Find certificate by email adddress in My Other Peoples Store.
        ' The certificate can be imported by *.cer file like this: 
        ' recipient.Certificate.Load("c:\encrypt1.cer")
        ' Once the certificate Is loaded to MailAddress, the email content will be encrypted automatically
        recipient.Certificate.FindSubject(recipient.Address,
                Certificate.CertificateStoreLocation.CERT_SYSTEM_STORE_CURRENT_USER,
                "AddressBook")
    Catch
        Try
            ' No certificate found in AddressBook, lookup it in My 
            recipient.Certificate.FindSubject(recipient.Address,
                Certificate.CertificateStoreLocation.CERT_SYSTEM_STORE_CURRENT_USER,
                "My")
        Catch ex As Exception
            Console.WriteLine("No encryption certificate found for {0} - {1}", recipient.Address, ex.Message)
        End Try
    End Try
Next


[C# - Encrypt Email]

SmtpMail oMail = new SmtpMail("TryIt");
oMail.From = "test@adminsystem.com";
oMail.To = "encrypt1@adminsystem.com, encrypt2@adminsystem.com";

for (int i = 0; i < oMail.To.Count; i++)
{
    MailAddress recipient = oMail.To[i] as MailAddress;
    try
    {
        // Find certificate by email adddress in My Other Peoples Store.
        // The certificate can be also imported by *.cer file like this: 
        // recipient.Certificate.Load("c:\\encrypt1.cer");
        // Once the certificate is loaded to MailAddress, the email content will be encrypted automatically

        recipient.Certificate.FindSubject(recipient.Address,
            Certificate.CertificateStoreLocation.CERT_SYSTEM_STORE_CURRENT_USER,
            "AddressBook");
    }
    catch
    {
        try
        {
            // No certificate found in AddressBook, lookup it in My
            recipient.Certificate.FindSubject(recipient.Address,
                Certificate.CertificateStoreLocation.CERT_SYSTEM_STORE_CURRENT_USER,
                "My");
        }
        catch (Exception exp)
        {
            Console.WriteLine("No encryption certificate found for {0} - {1}", recipient.Address, exp.Message);
        }
    }
}


[VB - Find Certificate in Active Directory by LDAP]

Dim oMail As SmtpMail = New SmtpMail("TryIt")
oMail.From = New MailAddress("test@adminsystem.com")
oMail.To = New AddressCollection("Encryptor <encrypt@adminsystem.com>")

For i As Integer = 0 To oMail.To.Count - 1
    Dim recipient As MailAddress = oMail.To(i)
    Try
        ' Please change the ldap path as your environment.
        recipient.Certificate.FindSubject(recipient.Address,
            Certificate.CertificateStoreLocation.CERT_STORE_PROV_LDAP_STORE,
            String.Format("ldap:///CN={0},CN=USERS,DC=my,DC=server?userCertificate", recipient.Name))
    Catch exp As Exception
        Console.WriteLine("No encryption certificate found for {0} - {1}", recipient.Address, exp.Message)
    End Try
Next


[C# - Find Certificate in Active Directory by LDAP]

SmtpMail oMail = new SmtpMail("TryIt");
oMail.From = "test@adminsystem.com";
oMail.To = "Encryptor <encrypt@adminsystem.com>";

for (int i = 0; i < oMail.To.Count; i++)
{
    MailAddress recipient = oMail.To[i] as MailAddress;
    try
    {
        // Please change the ldap path as your environment.
        recipient.Certificate.FindSubject(recipient.Address,
            Certificate.CertificateStoreLocation.CERT_STORE_PROV_LDAP_STORE,
            String.Format("ldap:///CN={0},CN=USERS,DC=my,DC=server?userCertificate", recipient.Name));
    }
    catch (Exception exp)
    {
        Console.WriteLine("No encryption certificate found for {0} - {1}", recipient.Address, exp.Message);
    }
}

Online Examples

Sign Email - VB
Encrypt Email - VB
Sign Email - C#
Encrypt Email - C#
Sign Email - C++/CLI
Encrypt Email - C++/CLI