private static SecurityContextSet LoadContextSet(string fileName)
{
if (fileName == null)
{
fileName = "ServerKeys.cbor";
}
KeySet keys = new KeySet();
SecurityContextSet newSet = new SecurityContextSet();
FileStream fs = new FileStream(fileName, FileMode.Open);
using (BinaryReader reader = new BinaryReader(fs)) {
byte[] data = reader.ReadBytes((int)fs.Length);
CBORObject obj = CBORObject.DecodeFromBytes(data);
for (int i = 0; i < obj.Count; i++)
{
OneKey key = new OneKey(obj[i]);
string[] usages = key[_UsageKey].AsString().Split(' ');
foreach (String usage in usages)
{
if (usage == "oscoap")
{
SecurityContext ctx = SecurityContext.DeriveContext(
key[CoseKeyParameterKeys.Octet_k].GetByteString(),
null,
key[CBORObject.FromObject("RecipID")].GetByteString(),
key[CBORObject.FromObject("SenderID")].GetByteString(), null,
key[CoseKeyKeys.Algorithm]);
newSet.Add(ctx);
break;
}
else if (usage == "oscoap-group")
{
SecurityContext ctx = SecurityContext.DeriveGroupContext(
key[CoseKeyParameterKeys.Octet_k].GetByteString(), key[CBORObject.FromObject(2)].GetByteString(), key[CBORObject.FromObject("SenderID")].GetByteString(),
null, null,
null, null, null, key[CoseKeyKeys.Algorithm]);
foreach (CBORObject recipient in key[CBORObject.FromObject("recipients")].Values)
{
ctx.AddRecipient(recipient[CBORObject.FromObject("RecipID")].GetByteString(), new OneKey(recipient[CBORObject.FromObject("sign")]));
}
newSet.Add(ctx);
}
}
if ((usages.Length != 1) || (usages[0] != "oscoap"))
{
keys.AddKey(key);
}
}
reader.Close();
}
//
return(newSet);
}
/// <summary>
/// What the CBOR structure needs to look like:
///
/// </summary>
/// <param name="cmds"></param>
private static void AddGroupOscoreKey(string[] cmds)
{
if (cmds.Length != 3)
{
Console.WriteLine("Incorrect number of arguments: " + cmds.Length);
return;
}
CBORObject cbor = CBORDiagnostics.Parse(cmds[2]);
byte[] salt = null;
if (cbor.ContainsKey(CoseKeyKeys.slt))
{
salt = cbor[CoseKeyKeys.slt].GetByteString();
}
SecurityContext ctx = SecurityContext.DeriveGroupContext(cbor[CoseKeyParameterKeys.Octet_k].GetByteString(),
cbor[CBORObject.FromObject("GroupID")].GetByteString(),
cbor[CBORObject.FromObject("sender")][CBORObject.FromObject("ID")].GetByteString(),
cbor["sender"]["sign"][CoseKeyKeys.Algorithm],
new OneKey(cbor["sender"]["sign"]),
null, null, salt, cbor[CoseKeyKeys.Algorithm]);
ctx.CountersignParams = cbor["ParCS"];
ctx.CountersignKeyParams = cbor["ParCSKey"];
foreach (CBORObject recipient in cbor[CBORObject.FromObject("recipients")].Values)
{
OneKey signKey = null;
if (recipient.ContainsKey("sign"))
{
signKey = new OneKey(recipient["sign"]);
}
ctx.AddRecipient(recipient[CBORObject.FromObject("ID")].GetByteString(), signKey);
}
ctx.Locate = (context, kid) => {
Console.WriteLine("Looking for a kid with a value of " + ByteArrayUtils.ToHexString(kid));
return(null);
};
Program._OscoreKeys.Add(cmds[1], ctx);
}
static void RunCommand(string[] commands)
{
if (commands.Length == 0)
{
return;
}
switch (commands[0].ToUpper())
{
default:
_dispatchTable.Execute(commands);
break;
case "SCRIPT":
TextReader x = new StreamReader(commands[1]);
RunScript(x);
x.Dispose();
break;
case "COMMENT":
break;
case "EXIT":
Environment.Exit(0);
break;
case "PAUSE":
Console.ReadLine();
break;
case "TIMEOUT":
break;
case "LOG-LEVEL":
if (commands.Length != 2)
{
Console.WriteLine("Incorrect number of args");
return;
}
switch (commands[1].ToUpper())
{
case "INFO":
LogManager.Level = LogLevel.Info;
break;
case "NONE":
LogManager.Level = LogLevel.None;
break;
case "FATAL":
LogManager.Level = LogLevel.Fatal;
break;
default:
Console.WriteLine("Unknown level");
break;
}
break;
case "LOG-TO":
break;
case "OPTION":
OptionType typ = GetOptionType(commands[1]);
switch (typ)
{
case OptionType.ContentFormat:
case OptionType.Accept:
if (commands.Length == 2)
{
_Options.Add(Option.Create(typ));
}
else
{
for (int i = 2; i < commands.Length; i++)
{
int val = MediaType.ApplicationLinkFormat;
if (int.TryParse(commands[i], out val))
{
_Options.Add(Option.Create(typ, val));
}
else
{
Console.WriteLine($"Bad option value '{commands[i]}'");
}
}
}
break;
case OptionType.Unknown:
Console.WriteLine("Unrecognized type string");
return;
default:
if (commands.Length == 2)
{
_Options.Add(Option.Create(typ));
}
else
{
for (int i = 2; i < commands.Length; i++)
{
_Options.Add(Option.Create(typ, commands[i]));
}
}
break;
}
break;
case "CLEAR-OPTION":
if (commands.Length == 1)
{
_Options.Clear();
return;
}
typ = GetOptionType(commands[1]);
List <Option> del = new List <Option>();
foreach (Option op in _Options)
{
if (op.Type == typ)
{
del.Add(op);
}
}
foreach (Option op in del)
{
_Options.Remove(op);
}
break;
case "BODY":
if (commands.Length == 1)
{
break;
}
byte[] b = File.ReadAllBytes(commands[1]);
Body = b;
break;
#if false
case "EDHOC":
RunEdhoc(commands);
break;
#endif
case "ADD-OSCOAP":
if (commands.Length != 3)
{
Console.WriteLine("Incorrect number of arguments: " + commands.Length);
return;
}
CBORObject cbor = CBORDiagnostics.Parse(commands[2]);
SecurityContext ctx = SecurityContext.DeriveContext(
cbor[CoseKeyParameterKeys.Octet_k].GetByteString(),
cbor[CBORObject.FromObject("RecipID")].GetByteString(),
cbor[CBORObject.FromObject("SenderID")].GetByteString(), null,
cbor[CoseKeyKeys.Algorithm]);
_OscopKeys.Add(commands[1], ctx);
break;
#if DEV_VERSION
case "ADD-OSCOAP-GROUP":
if (commands.Length != 3)
{
Console.WriteLine("Incorrect number of arguments: " + commands.Length);
return;
}
cbor = CBORDiagnostics.Parse(commands[2]);
ctx = SecurityContext.DeriveGroupContext(cbor[CoseKeyParameterKeys.Octet_k].GetByteString(), cbor[CoseKeyKeys.KeyIdentifier].GetByteString(),
cbor[CBORObject.FromObject("sender")][CBORObject.FromObject("ID")].GetByteString(), null, null, cbor[CoseKeyKeys.Algorithm]);
ctx.Sender.SigningKey = new OneKey(cbor["sender"]["sign"]);
foreach (CBORObject recipient in cbor[CBORObject.FromObject("recipients")].Values)
{
ctx.AddRecipient(recipient[CBORObject.FromObject("ID")].GetByteString(), new OneKey(recipient["sign"]));
}
_OscopKeys.Add(commands[1], ctx);
break;
#endif
case "USE-OSCOAP":
if (commands.Length != 2)
{
Console.WriteLine("Incorrect number of arguments: " + commands.Length);
return;
}
if (commands[1] == "NONE")
{
_CurrentOscoap = null;
return;
}
if (!_OscopKeys.ContainsKey(commands[1]))
{
Console.WriteLine($"OSCOAP Key {commands[1]} is not defined");
return;
}
_CurrentOscoap = _OscopKeys[commands[1]];
break;
case "OSCOAP-TEST":
OscoapTests.RunTest(Int32.Parse(commands[1]));
break;
case "OSCOAP-PIV":
_CurrentOscoap.Sender.SequenceNumber = Int32.Parse(commands[1]);
break;
case "EDHOC-ADD-SERVER-KEY":
if (commands.Length != 2)
{
Console.WriteLine("Incorrect number of arguments: " + commands.Length);
return;
}
cbor = CBORDiagnostics.Parse(commands[2]);
_EdhocServerKeys.AddKey(new OneKey(cbor));
break;
case "EDHOC-ADD-USER-KEY":
if (commands.Length != 3)
{
Console.WriteLine("Incorrect number of arguments: " + commands.Length);
return;
}
cbor = CBORDiagnostics.Parse(commands[2]);
_EdhocValidateKeys.Add(commands[1], new OneKey(cbor));
break;
}
}
static KeySet LoadKeys(string fileName)
{
if (fileName == null)
{
fileName = "ServerKeys.cbor";
}
KeySet keys = new KeySet();
FileStream fs = new FileStream(fileName, FileMode.Open);
using (BinaryReader reader = new BinaryReader(fs)) {
byte[] data = reader.ReadBytes((int)fs.Length);
CBORObject obj = CBORObject.DecodeFromBytes(data);
for (int i = 0; i < obj.Count; i++)
{
OneKey key = new OneKey(obj[i]);
string[] usages = key[_UsageKey].AsString().Split(' ');
foreach (String usage in usages)
{
if (usage == "oscoap")
{
SecurityContext ctx = SecurityContext.DeriveContext(
key[CoseKeyParameterKeys.Octet_k].GetByteString(),
key[CBORObject.FromObject("RecipID")].GetByteString(),
key[CBORObject.FromObject("SenderID")].GetByteString(), null,
key[CoseKeyKeys.Algorithm]);
SecurityContextSet.AllContexts.Add(ctx);
break;
}
#if DEV_VERSION
else if (usage == "oscoap-group")
{
SecurityContext ctx = SecurityContext.DeriveGroupContext(
key[CoseKeyParameterKeys.Octet_k].GetByteString(),
key[CoseKeyKeys.KeyIdentifier].GetByteString(),
key[CBORObject.FromObject("sender")][CBORObject.FromObject("ID")].GetByteString(), null,
null, key[CoseKeyKeys.Algorithm]);
ctx.Sender.SigningKey = new OneKey(obj[i]["sign"]);
foreach (CBORObject recipient in key[CBORObject.FromObject("recipients")].Values)
{
ctx.AddRecipient(recipient[CBORObject.FromObject("ID")].GetByteString(),
new OneKey(recipient["sign"]));
}
SecurityContextSet.AllContexts.Add(ctx);
}
#endif
else if (usage == "dtls")
{
if (key.HasPrivateKey())
{
DtlsSignKeys.AddKey(key);
}
else
{
DtlsValidateKeys.AddKey(key);
}
}
else if (usage == "edhoc")
{
if (key[CoseKeyKeys.KeyType].Equals(GeneralValues.KeyType_EC) ||
key[CoseKeyKeys.KeyType].Equals(GeneralValues.KeyType_OKP))
{
if (key.ContainsName(CoseKeyParameterKeys.EC_D))
{
edhocSign = key;
}
else
{
edhocKeys.AddKey(key);
}
}
else
{
edhocKeys.AddKey(key);
}
}
}
if ((usages.Length != 1) || (usages[0] != "oscoap"))
{
keys.AddKey(key);
}
}
reader.Close();
}
return(keys);
}
