/// <summary>
/// Requests an update for the keyboard state and session ID.
/// </summary>
private async Task <bool> RequestAppleTVKeyboardInfoUpdateAsync()
{
List <byte> contentBytes = new List <byte>();
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmcc", "0"));
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmbe", "PromptResendReq"));
ByteArrayContent content = new ByteArrayContent(contentBytes.ToArray());
DACPRequest request = new DACPRequest("/ctrl-int/1/controlpromptentry");
request.HttpContent = content;
try
{
await SubmitRequestAsync(request).ConfigureAwait(false);
}
catch { return(false); }
return(true);
}
/// <summary>
/// Requests an update for the virtual trackpad connection parameters.
/// </summary>
private async Task <bool> RequestAppleTVTrackpadInfoUpdateAsync()
{
List <byte> contentBytes = new List <byte>();
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmcc", "0"));
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmbe", "DRPortInfoRequest"));
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmte", string.Format("{0},0x{1}", AppleTVEncryptionKey, PairingCode)));
ByteArrayContent content = new ByteArrayContent(contentBytes.ToArray());
DACPRequest request = new DACPRequest("/ctrl-int/1/controlpromptentry");
request.HttpContent = content;
try
{
await SubmitRequestAsync(request).ConfigureAwait(false);
}
catch { return(false); }
return(true);
}
private async Task <bool> SendAppleTVKeyboardStringUpdateCommandAsync(string value, bool done)
{
string command = (done) ? "PromptDone" : "PromptUpdate";
List <byte> contentBytes = new List <byte>();
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmcc", _appleTVKeyboardSessionID));
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmbe", command));
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmte", value));
ByteArrayContent content = new ByteArrayContent(contentBytes.ToArray());
DACPRequest request = new DACPRequest("/ctrl-int/1/controlpromptentry");
request.HttpContent = content;
try
{
await SubmitRequestAsync(request).ConfigureAwait(false);
}
catch { return(false); }
return(true);
}
public async Task <bool> SendAppleTVKeyboardSecureTextAsync(string value)
{
if (!_appleTVKeyboardSecureText || string.IsNullOrEmpty(_appleTVKeyboardSecureTextCertificate) || string.IsNullOrEmpty(_appleTVKeyboardSecureTextChallenge))
{
return(false);
}
byte[] encryptedBytes;
try
{
// Read the certificate
byte[] certificateBytes = BitUtility.FromHexString(_appleTVKeyboardSecureTextCertificate);
var certificate = new X509Certificate(certificateBytes);
// X509Certificate gives us the ASN.1 DER-encoded RSA public key
var publicKeyEncoded = certificate.GetPublicKey();
if (publicKeyEncoded[0] != 0x30 || publicKeyEncoded[1] != 0x81)
{
throw new Exception();
}
// Byte at index 2 is the length of the entire sequence, we can ignore this
if (publicKeyEncoded[3] != 0x02 || publicKeyEncoded[4] != 0x81)
{
throw new Exception();
}
// Length of the public key
int length = publicKeyEncoded[5];
int position = 6;
// Skip any padding at the beginning
while (publicKeyEncoded[position] == 0x00)
{
length--;
position++;
}
// Get the public key
byte[] publicKey = new byte[length];
System.Buffer.BlockCopy(publicKeyEncoded, position, publicKey, 0, length);
// Length/position of exponent
position += length;
if (publicKeyEncoded[position] != 0x02)
{
throw new Exception();
}
position++;
length = publicKeyEncoded[position];
position++;
// Get the exponent
byte[] exponent = new byte[length];
System.Buffer.BlockCopy(publicKeyEncoded, position, exponent, 0, length);
// Get bytes to encrypt
var bytesToEncode = new List <byte>();
bytesToEncode.AddRange(BitUtility.FromHexString(_appleTVKeyboardSecureTextChallenge));
bytesToEncode.AddRange(Encoding.UTF8.GetBytes(value));
// Set up RSA parameters
var rsaParameters = new RSAParameters();
rsaParameters.Modulus = publicKey;
rsaParameters.Exponent = exponent;
// Create RSA provider
using (var rsa = new RSACryptoServiceProvider())
{
rsa.ImportParameters(rsaParameters);
// Encrypt the source data
encryptedBytes = rsa.Encrypt(bytesToEncode.ToArray(), false);
}
}
catch { return(false); }
// Create DACP request
List <byte> contentBytes = new List <byte>();
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmcc", _appleTVKeyboardSessionID));
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmbe", "PromptDone"));
contentBytes.AddRange(DACPUtility.GetDACPFormattedBytes("cmae", BitUtility.ToHexString(encryptedBytes)));
ByteArrayContent content = new ByteArrayContent(contentBytes.ToArray());
DACPRequest request = new DACPRequest("/ctrl-int/1/controlpromptentry");
request.HttpContent = content;
try
{
await SubmitRequestAsync(request).ConfigureAwait(false);
}
catch { return(false); }
return(true);
}
