private static LicenseError Validate(string licenseItemName, Assembly assembly, bool designMode, bool throwsException)
{
if (assembly == null)
{
throw new ArgumentNullException("assembly");
}
if (string.IsNullOrEmpty(licenseItemName))
{
throw new ArgumentNullException("licenseItemName");
}
LicenseError error = null;
License license = GetLicense(assembly, designMode);
if (license != null)
{
error = license.Validate(licenseItemName);
}
if (license == null || error != null)
{
string publicKeyToken = AssemblyLicense.GetAssemblyPublicKeyToken(assembly);
// check the calling assembly's public key token
Assembly entryAssembly = Assembly.GetEntryAssembly();
if (entryAssembly != null && entryAssembly != assembly)
{
if (AssemblyLicense.GetAssemblyPublicKeyToken(entryAssembly) == publicKeyToken) // Entry assembly signed by the same key
{
if (IsTraceEnabled)
{
WriteTrace(assembly, Messages.FormatAssemblySignedWithSameKey(entryAssembly));
}
return(null);
}
}
// check the calling assembly's public key token
Assembly currentAssembly = Assembly.GetExecutingAssembly();
StackTrace stackTrace = new StackTrace();
for (int i = 1; i < stackTrace.FrameCount; i++)
{
StackFrame stackFrame = stackTrace.GetFrame(i);
Type reflectedType = stackFrame.GetMethod().ReflectedType;
if (reflectedType == null)
{
continue;
}
Assembly reflectedAssembly = reflectedType.Assembly;
if (reflectedAssembly == assembly || reflectedAssembly == currentAssembly)
{
continue;
}
if (AssemblyLicense.GetAssemblyPublicKeyToken(reflectedAssembly) == publicKeyToken) // Calling assembly signed by the same key
{
if (IsTraceEnabled)
{
WriteTrace(assembly, Messages.FormatAssemblySignedWithSameKey(reflectedAssembly));
}
return(null);
}
}
}
if (license == null)
{
error = new LicenseError(assembly, LicenseErrorReason.NullLicense, Messages.NullLicense, null);
}
if (error != null && throwsException)
{
throw new LicenseException(error);
}
return(error);
}
/// <summary>Initializes a new instance of the <see cref="LicenseError" /> class</summary>
/// <param name="assembly">The assembly for the license validation.</param>
/// <param name="reason">The reason for the license validation error.</param>
/// <param name="message">The message for the license validation error.</param>
/// <param name="license">The <see cref="License" /> that fails the validation.</param>
public LicenseError(Assembly assembly, LicenseErrorReason reason, string message, License license)
{
if (assembly == null)
{
throw new ArgumentNullException("assembly");
}
if (string.IsNullOrEmpty(message))
{
throw new ArgumentNullException("message");
}
_assembly = assembly;
_reason = reason;
_message = message;
_license = license;
}
internal LicenseItemCollection(License license)
{
Debug.Assert(license != null);
_licence = license;
}