//--- Class Constructor ---
static DekiScriptRuntime() {
// register built-in functions
_commonFunctions = new Dictionary<XUri, DekiScriptInvocationTargetDescriptor>();
foreach(MethodInfo method in typeof(DekiScriptLibrary).GetMethods(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy)) {
// check if it has the DekiScriptFunction attribute
DekiScriptFunctionAttribute functionAttribute = (DekiScriptFunctionAttribute)Attribute.GetCustomAttribute(method, typeof(DekiScriptFunctionAttribute));
if(functionAttribute != null) {
var parameters = from param in method.GetParameters()
let attr = (DekiScriptParamAttribute[])param.GetCustomAttributes(typeof(DekiScriptParamAttribute), false)
select ((attr != null) && (attr.Length > 0)) ? new DekiScriptNativeInvocationTarget.Parameter(attr[0].Hint, attr[0].Optional) : null;
var target = new DekiScriptNativeInvocationTarget(null, method, parameters.ToArray());
var function = new DekiScriptInvocationTargetDescriptor(target.Access, functionAttribute.IsProperty, functionAttribute.IsIdempotent, functionAttribute.Name ?? method.Name, target.Parameters, target.ReturnType, functionAttribute.Description, functionAttribute.Transform, target);
_commonFunctions[new XUri("native:///").At(function.SystemName)] = function;
}
}
// build common env
DekiScriptMap common = new DekiScriptMap();
// add global constants
common.AddNativeValueAt("num.e", Math.E);
common.AddNativeValueAt("num.pi", Math.PI);
common.AddNativeValueAt("num.epsilon", double.Epsilon);
common.AddNativeValueAt("num.positiveinfinity", double.PositiveInfinity);
common.AddNativeValueAt("num.negativeinfinity", double.NegativeInfinity);
common.AddNativeValueAt("num.nan", double.NaN);
// add global functions & properties
foreach(var function in _commonFunctions) {
common.AddNativeValueAt(function.Value.Name, function.Key);
}
_commonEnv = new DekiScriptEnv(common);
}
//--- Class Constructor ---
static DekiScriptRuntime()
{
// register built-in functions
_commonFunctions = new Dictionary <XUri, DekiScriptInvocationTargetDescriptor>();
foreach (MethodInfo method in typeof(DekiScriptLibrary).GetMethods(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy))
{
// check if it has the DekiScriptFunction attribute
DekiScriptFunctionAttribute functionAttribute = (DekiScriptFunctionAttribute)Attribute.GetCustomAttribute(method, typeof(DekiScriptFunctionAttribute));
if (functionAttribute != null)
{
var parameters = from param in method.GetParameters()
let attr = (DekiScriptParamAttribute[])param.GetCustomAttributes(typeof(DekiScriptParamAttribute), false)
select((attr != null) && (attr.Length > 0)) ? new DekiScriptNativeInvocationTarget.Parameter(attr[0].Hint, attr[0].Optional) : null;
var target = new DekiScriptNativeInvocationTarget(null, method, parameters.ToArray());
var function = new DekiScriptInvocationTargetDescriptor(target.Access, functionAttribute.IsProperty, functionAttribute.IsIdempotent, functionAttribute.Name ?? method.Name, target.Parameters, target.ReturnType, functionAttribute.Description, functionAttribute.Transform, target);
_commonFunctions[new XUri("native:///").At(function.SystemName)] = function;
}
}
// build common env
DekiScriptMap common = new DekiScriptMap();
// add global constants
common.AddNativeValueAt("num.e", Math.E);
common.AddNativeValueAt("num.pi", Math.PI);
common.AddNativeValueAt("num.epsilon", double.Epsilon);
common.AddNativeValueAt("num.positiveinfinity", double.PositiveInfinity);
common.AddNativeValueAt("num.negativeinfinity", double.NegativeInfinity);
common.AddNativeValueAt("num.nan", double.NaN);
// add global functions & properties
foreach (var function in _commonFunctions)
{
common.AddNativeValueAt(function.Value.Name, function.Key);
}
_commonEnv = new DekiScriptEnv(common);
}
public static DekiScriptMap GetImplicitEnvironment(DreamMessage message, DSACryptoServiceProvider publicDigitalSignature)
{
DekiScriptMap env = new DekiScriptMap();
// retrieve implicit arguments
string[] headers = message.Headers.GetValues(IMPLICIT_ENVIRONMENT_HEADER);
if (!ArrayUtil.IsNullOrEmpty(headers))
{
env.AddAt("__implicit", new DekiScriptList(new ArrayList(headers)));
foreach (string implicitArg in headers)
{
foreach (KeyValuePair <string, string> arg in HttpUtil.ParseNameValuePairs(implicitArg))
{
env.AddNativeValueAt(arg.Key, arg.Value);
}
}
}
if (publicDigitalSignature != null)
{
bool valid = false;
try {
Dictionary <string, string> values = HttpUtil.ParseNameValuePairs(message.Headers[IMPLICIT_SIGNATURE_HEADER]);
// verify date
DateTime date = DateTime.Parse(values["date"]).ToUniversalTime();
double delta = DateTime.UtcNow.Subtract(date).TotalSeconds;
if ((delta < -60) || (delta > 60))
{
throw new DreamAbortException(DreamMessage.Forbidden("date in message signature is too far apart from server date"));
}
// verify message
MemoryStream data = new MemoryStream();
byte[] bytes = null;
// get message bytes
bytes = message.AsBytes();
data.Write(bytes, 0, bytes.Length);
// retrieve headers to verify
if (!ArrayUtil.IsNullOrEmpty(headers))
{
Array.Sort(headers, StringComparer.Ordinal);
bytes = Encoding.UTF8.GetBytes(string.Join(",", headers));
data.Write(bytes, 0, bytes.Length);
}
// add request date
bytes = Encoding.UTF8.GetBytes(values["date"]);
data.Write(bytes, 0, bytes.Length);
// verify signature
byte[] signature = Convert.FromBase64String(values["dsig"]);
valid = publicDigitalSignature.VerifyData(data.GetBuffer(), signature);
} catch (Exception e) {
if (e is DreamAbortException)
{
throw;
}
}
if (!valid)
{
throw new DreamAbortException(DreamMessage.Forbidden("invalid or missing digital signature"));
}
}
return(env);
}