/// <summary>
/// Encrypt a text message and send it to the given recipient.
/// </summary>
/// <param name="threemaId">target Threema ID</param>
/// <param name="text">the text to send</param>
/// <returns>generated message ID</returns>
public string SendTextMessage(string threemaId, string text)
{
//fetch public key
byte[] publicKey = this.apiConnector.LookupKey(threemaId);
if (publicKey == null)
{
throw new InvalidKeyException("invalid threema id");
}
EncryptResult res = CryptTool.EncryptTextMessage(text, this.privateKey, publicKey);
return(this.apiConnector.SendE2EMessage(threemaId, res.Nonce, res.Result));
}
protected override void Execute()
{
byte[] privateKey = this.privateKeyField.GetValue();
byte[] publicKey = this.publicKeyField.GetValue();
/* read text from stdin */
//string text = ReadStream(System.Console.In).Trim();
string text = DataUtils.Utf8Endcode(System.Console.ReadLine().Trim());
EncryptResult res = CryptTool.EncryptTextMessage(text, privateKey, publicKey);
System.Console.WriteLine(DataUtils.ByteArrayToHexString(res.Nonce));
System.Console.WriteLine(DataUtils.ByteArrayToHexString(res.Result));
}
public void TestEncrypt()
{
string text = "Dies ist eine Testnachricht. äöü";
Key privateKey = Key.DecodeKey(Common.myPrivateKey);
Key publicKey = Key.DecodeKey(Common.otherPublicKey);
EncryptResult res = CryptTool.EncryptTextMessage(text, privateKey.key, publicKey.key);
Assert.IsNotNull(res);
Assert.IsNotNull(res.Nonce);
Assert.IsNotNull(res.Result);
Assert.IsFalse(res.Nonce.SequenceEqual(new byte[res.Nonce.Length]));
Assert.IsFalse(res.Result.SequenceEqual(new byte[res.Result.Length]));
}
/// <summary>
/// Wrapper to encrypt text <see cref="Threema.MsgApi.CryptTool.EncryptTextMessage"/>
/// </summary>
/// <param name="text">Text to encrypt</param>
/// <param name="senderPrivateKey">Sender private key as hex-string</param>
/// <param name="recipientPublicKey">Recipient public key as hex-string</param>
/// <returns>Array with encrypted text, nonce and size</returns>
public ArrayList EncryptTextMessage(string text, string senderPrivateKey, string recipientPublicKey)
{
byte[] privateKey = GetKey(senderPrivateKey, Key.KeyType.PRIVATE);
byte[] publicKey = GetKey(recipientPublicKey, Key.KeyType.PUBLIC);
string textEncoded = DataUtils.Utf8Endcode(text);
EncryptResult encryptResult = CryptTool.EncryptTextMessage(textEncoded, privateKey, publicKey);
var result = new ArrayList();
result.Add(DataUtils.ByteArrayToHexString(encryptResult.Result));
result.Add(DataUtils.ByteArrayToHexString(encryptResult.Nonce));
result.Add(encryptResult.Size.ToString());
return(result);
}