GDSecureMimeEncoder Class

Encoder class used to generate a SMIME message.

Inheritance Hierarchy

SystemObject
GDGDSecureMimeEncoder

Namespace: GD
Assembly: GD (in GD.dll) Version: 255.255.255.255

Syntax

C++

JavaScript

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public sealed class GDSecureMimeEncoder

public ref class GDSecureMimeEncoder sealed

GD.GDSecureMimeEncoder = function();

Type.createClass(
	'GD.GDSecureMimeEncoder');

The GDSecureMimeEncoder type exposes the following members.

Constructors

	Name	Description
	GDSecureMimeEncoder	Initializes new GDSecureMimeEncoder object based on binary data of message passed as argument.

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Methods

	Name	Description
	Encrypt	Encrypts the stream using the recipient's public key.
	Equals	(Inherited from Object.)
	FlushAsync	Flushes all previously invoked operations in an asynchronous operation. If one of operations fail, method throws exception.
	GetHashCode	(Inherited from Object.)
	GetType	(Inherited from Object.)
	Sign(GDSecureMimeCertificate, GDSMIMEDigest, GDSMIMESignFormat)	Signs a message.
	Sign(GDSecureMimeCertificate, IListGDSecureMimeCertificate, GDSMIMEDigest, GDSMIMESignFormat)	Signs a message.
	ToString	(Inherited from Object.)

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Examples

The following example show how to sign and encrypt message using GDSecureMimeEncoder class. We assume that needed certificates are already in local secure store.

1. First of all you have to add proper using statements at the top of your code file.

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using Windows.Security.Cryptography;
using System.Collections.Generic;
using Windows.Storage.Streams;
using System.Diagnostics;
using System;
using GD;

...

2. Next you can build code for sign and encrypt message using GDSecureMimeEncoder like that.

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...

string message = "From:foo.bar@blackberry.com\r\nTo:john.doe@blackberry.com\r\n\r\nhello."
IBuffer messageBuffer = CryptographicBuffer.ConvertStringToBinary(message, BinaryStringEncoding.Utf8);

string email = "john.doe@blackberry.com";

IList<GDSecureMimeCertificate> recipientCerts = GDSecureMimeCertificate.GetCertificates(email);
IList<GDSecureMimeCertificate> signingCerts = GDSecureMimeCertificate.GetSigningCertificates();

GDSecureMimeEncoder encoder = new GDSecureMimeEncoder(messageBuffer);

encoder.Sign(signingCerts[0], GDSMIMEDigest.RSA_SHA1, GDSMIMESignFormat.OpaqueSigned);
encoder.Encrypt(recipientCerts, GDSMIMECipher.AES_256_CBC);

IBuffer smimeMessageBuffer;

try
{
    smimeMessageBuffer = await encoder.FlushAsync();
}
catch(InvalidArgumentException e)
{
    Debug.WriteLine("InvalidArgumentException thrown when encoding for SMIME. Message: {0}", e.Message);
    return;
}
catch(Exception e)
{
    Debug.WriteLine("Exception thrown when encoding for SMIME. Message: {0}", e.Message);
    return;
}

...

Reference

GD Namespace