public void PerformSignature()
{
CBORObject cborProtected = CBORObject.FromObject(new byte[0]);
if ((ProtectedMap != null) && (ProtectedMap.Count > 0))
{
byte[] rgb = ProtectedMap.EncodeToBytes();
cborProtected = CBORObject.FromObject(rgb);
}
if (_rgbSignature == null)
{
CBORObject signObj = CBORObject.NewArray();
signObj.Add(_context);
signObj.Add(cborProtected);
signObj.Add(ExternalData); // External AAD
signObj.Add(rgbContent);
_rgbSignature = _Sign(toBeSigned());
#if FOR_EXAMPLES
m_toBeSigned = signObj.EncodeToBytes();
#endif
}
}
public CBORObject EncodeToCBORObject(byte[] bodyAttributes, byte[] body)
{
CBORObject obj = CBORObject.NewArray();
CBORObject cborProtected = CBORObject.FromObject(new byte[0]);
if ((ProtectedMap != null) && (ProtectedMap.Count > 0))
{
byte[] rgb = ProtectedMap.EncodeToBytes();
cborProtected = CBORObject.FromObject(rgb);
}
ProtectedBytes = cborProtected.GetByteString();
obj.Add(cborProtected);
if (rgbSignature == null)
{
rgbSignature = Sign(toBeSigned(body, bodyAttributes));
}
ProcessCounterSignatures();
if ((UnprotectedMap == null))
{
obj.Add(CBORObject.NewMap());
}
else
{
obj.Add(UnprotectedMap); // Add unprotected attributes
}
obj.Add(rgbSignature);
return(obj);
}
private byte[] BuildContentBytes()
#endif
{
CBORObject obj = CBORObject.NewArray();
obj.Add(_strContext);
if (ProtectedBytes == null)
{
if (ProtectedMap.Count > 0)
{
ProtectedBytes = ProtectedMap.EncodeToBytes();
}
else
{
ProtectedBytes = new byte[0];
}
}
obj.Add(ProtectedBytes);
if (ExternalData != null)
{
obj.Add(CBORObject.FromObject(ExternalData));
}
else
{
obj.Add(CBORObject.FromObject(new byte[0]));
}
obj.Add(rgbContent);
return(obj.EncodeToBytes());
}
public override CBORObject Encode()
{
CBORObject obj;
obj = CBORObject.NewArray();
if ((ProtectedMap != null) && (ProtectedMap.Count > 0))
{
obj.Add(ProtectedMap.EncodeToBytes());
}
else
{
obj.Add(new byte[0]);
}
ProtectedBytes = obj[0].GetByteString();
ProcessCounterSignatures();
if ((UnprotectedMap == null) || (UnprotectedMap.Count == 0))
{
obj.Add(CBORObject.NewMap());
}
else
{
obj.Add(UnprotectedMap); // Add unprotected attributes
}
obj.Add(rgbContent);
PerformSignature();
obj.Add(_rgbSignature);
return(obj);
}
protected byte[] toBeSigned(byte[] rgbContent, byte[] bodyAttributes)
{
CBORObject cborProtected = CBORObject.FromObject(new byte[0]);
if ((ProtectedMap != null) && (ProtectedMap.Count > 0))
{
byte[] rgb = ProtectedMap.EncodeToBytes();
cborProtected = CBORObject.FromObject(rgb);
}
if (rgbContent == null)
{
rgbContent = new byte[0];
}
CBORObject signObj = CBORObject.NewArray();
signObj.Add(context);
signObj.Add(bodyAttributes);
signObj.Add(cborProtected);
signObj.Add(ExternalData);
signObj.Add(rgbContent);
#if FOR_EXAMPLES
m_toBeSigned = signObj.EncodeToBytes();
#endif
return(signObj.EncodeToBytes());
}
/// <summary>
/// Encode the COSE Encrypt0 item to a CBOR tree.
/// <see cref="Encrypt"/> must be done prior to calling this function.
/// </summary>
/// <returns></returns>
public override CBORObject Encode()
{
CBORObject cbor;
if (RgbEncrypted == null)
{
throw new CoseException("Must call Encrypt first");
}
ProcessCounterSignatures();
cbor = CBORObject.NewArray();
if (ProtectedMap.Count > 0)
{
cbor.Add(ProtectedMap.EncodeToBytes());
}
else
{
cbor.Add(CBORObject.FromObject(new byte[0]));
}
cbor.Add(UnprotectedMap); // Add unprotected attributes
if (m_emitContent)
{
cbor.Add(RgbEncrypted); // Add ciphertext
}
else
{
cbor.Add(CBORObject.Null);
}
return(cbor);
}
public override CBORObject Encode()
{
CBORObject obj;
if (RgbTag == null)
{
MAC();
}
obj = CBORObject.NewArray();
if (ProtectedMap.Count > 0)
{
obj.Add(ProtectedMap.EncodeToBytes());
}
else
{
obj.Add(new byte[0]);
}
if (UnprotectedMap.Count > 0)
{
obj.Add(UnprotectedMap); // Add unprotected attributes
}
else
{
obj.Add(CBORObject.NewMap());
}
obj.Add(rgbContent); // Add ciphertext
obj.Add(RgbTag);
if ((!m_forceArray) && (_recipientList.Count == 1))
{
CBORObject recipient = _recipientList[0].Encode();
for (int i = 0; i < recipient.Count; i++)
{
obj.Add(recipient[i]);
}
}
else if (_recipientList.Count > 0)
{
CBORObject recipients = CBORObject.NewArray();
foreach (Recipient key in _recipientList)
{
recipients.Add(key.Encode());
}
obj.Add(recipients);
}
else
{
obj.Add(null); // No recipients - set to null
}
return(obj);
}
public byte[] getAADBytes()
{
CBORObject obj = CBORObject.NewArray();
obj.Add(_context);
if (ProtectedMap.Count == 0)
{
ProtectedBytes = new byte[0];
}
else
{
ProtectedBytes = ProtectedMap.EncodeToBytes();
}
obj.Add(ProtectedBytes);
obj.Add(CBORObject.FromObject(ExternalData));
// Console.WriteLine("COSE AAD = " + BitConverter.ToString(obj.EncodeToBytes()));
return(obj.EncodeToBytes());
}
private byte[] toBeSigned()
{
CBORObject cborProtected = CBORObject.FromObject(new byte[0]);
if ((ProtectedMap != null) && (ProtectedMap.Count > 0))
{
byte[] rgb = ProtectedMap.EncodeToBytes();
cborProtected = CBORObject.FromObject(rgb);
}
CBORObject signObj = CBORObject.NewArray();
signObj.Add(_context);
signObj.Add(cborProtected);
signObj.Add(ExternalData); // External AAD
signObj.Add(rgbContent);
#if FOR_EXAMPLES
m_toBeSigned = signObj.EncodeToBytes();
#endif
return(signObj.EncodeToBytes());
}
public override CBORObject Encode()
{
CBORObject obj;
if (RgbTag == null)
{
throw new CoseException("Must call Compute before encoding");
}
ProcessCounterSignatures();
obj = CBORObject.NewArray();
if (ProtectedMap.Count > 0)
{
obj.Add(ProtectedMap.EncodeToBytes());
}
else
{
obj.Add(new byte[0]);
}
if (UnprotectedMap.Count > 0)
{
obj.Add(UnprotectedMap); // Add unprotected attributes
}
else
{
obj.Add(CBORObject.NewMap());
}
obj.Add(rgbContent); // Add ciphertext
obj.Add(RgbTag);
return(obj);
}
public override CBORObject Encode()
{
CBORObject obj;
byte[] rgbProtected;
obj = CBORObject.NewArray();
if ((ProtectedMap != null) && (ProtectedMap.Count > 0))
{
rgbProtected = ProtectedMap.EncodeToBytes();
obj.Add(rgbProtected);
}
else
{
rgbProtected = new byte[0];
obj.Add(rgbProtected);
}
if (CounterSignerList.Count() != 0)
{
if (CounterSignerList.Count() == 1)
{
AddAttribute(HeaderKeys.CounterSignature, CounterSignerList[0].EncodeToCBORObject(rgbProtected, rgbContent), UNPROTECTED);
}
else
{
foreach (CounterSignature sig in CounterSignerList)
{
sig.EncodeToCBORObject(rgbProtected, rgbContent);
}
}
}
if ((UnprotectedMap == null) || (UnprotectedMap.Count == 0))
{
obj.Add(CBORObject.NewMap());
}
else
{
obj.Add(UnprotectedMap); // Add unprotected attributes
}
obj.Add(rgbContent);
if ((signerList.Count == 1) && !m_forceArray)
{
CBORObject recipient = signerList[0].EncodeToCBORObject(obj[0].EncodeToBytes(), rgbContent);
for (int i = 0; i < recipient.Count; i++)
{
obj.Add(recipient[i]);
}
}
else if (signerList.Count > 0)
{
CBORObject signers = CBORObject.NewArray();
foreach (Signer key in signerList)
{
signers.Add(key.EncodeToCBORObject(rgbProtected, rgbContent));
}
obj.Add(signers);
}
else
{
obj.Add(null); // No recipients - set to null
}
return(obj);
}