public SignMessage(JSON json)
{
// Parse out the message from the JSON
if (json.ContainsKey("signatures"))
{
JSON signers = json["signatures"];
for (int i = 0; i < signers.Count; i++)
{
Signer signer = new Signer(signers[i]);
signerList.Add(signer);
}
}
else if (json.ContainsKey("signature"))
{
Signer signer = new Signer(json);
signerList.Add(signer);
}
if (json.ContainsKey("payload"))
{
JSON b64 = signerList[0].FindAttribute("b64", true);
if (b64 != null)
{
if (b64.nodeType != JsonType.boolean)
{
throw new Exception("Invalid message");
}
if (b64.AsBoolean())
{
payloadB64 = UTF8Encoding.UTF8.GetBytes(json["payload"].AsString());
payload = base64urldecode(json["payload"].AsString());
}
else
{
payload = UTF8Encoding.UTF8.GetBytes(json["payload"].AsString());
payloadB64 = payload;
}
}
else
{
payloadB64 = UTF8Encoding.UTF8.GetBytes(json["payload"].AsString());
payload = base64urldecode(json["payload"].AsString());
}
}
}
public JSON EncodeToJSON()
{
JSON obj = new JSON();
if (objUnprotected.Count > 0)
{
obj.Add("unprotected", objUnprotected); // Add unprotected attributes
}
// Look at the world of base64 encoded bodies.
// If any signer has the b64 false, then all of them need to.
// Then change our body if needed
int b64Found = 0;
bool b64Value = true;
foreach (Signer key in signerList)
{
JSON attr = key.FindAttribute("b64", true);
if (attr != null)
{
if (b64Found == 0)
{
b64Value = attr.AsBoolean();
}
else if (b64Value != attr.AsBoolean())
{
throw new JOSE_Exception("Not all signers using the same value for b64");
}
b64Found += 1;
}
}
if (b64Value)
{
obj.Add("payload", base64urlencode(payload));
}
else
{
if (b64Found != signerList.Count)
{
throw new JOSE_Exception("Not all signers using the same value for b64");
}
obj.Add("payload", UTF8Encoding.UTF8.GetString(payload));
}
if ((signerList.Count == 1) && !forceAsArray)
{
JSON recipient = signerList[0].EncodeToJSON(payload);
foreach (KeyValuePair <string, JSON> pair in recipient.map)
{
obj.Add(pair.Key, pair.Value);
}
}
else if (signerList.Count > 0)
{
JSON signers = new JSON();
foreach (Signer key in signerList)
{
signers.Add(key.EncodeToJSON(payload));
}
obj.Add("signatures", signers);
}
return(obj);
}
