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//
// MonoTlsProviderFactory.cs
//
// Author:
// Martin Baulig <martin.baulig@xamarin.com>
//
// Copyright (c) 2015 Xamarin, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#if !ONLY_APPLETLS // ONLY_APPLETLS uses MonoTlsProviderFactory.Apple.cs instead
#if SECURITY_DEP
#if MONO_SECURITY_ALIAS
extern alias MonoSecurity;
using MSI = MonoSecurity::Mono.Security.Interface;
using MX = MonoSecurity::Mono.Security.X509;
#else
using MSI = Mono.Security.Interface;
using MX = Mono.Security.X509;
#endif
using System.Security.Cryptography.X509Certificates;
#endif
using System;
using System.Net;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
#if !MOBILE
using System.Reflection;
#endif
namespace Mono.Net.Security
{
/*
* Keep in sync with Mono.Security/Mono.Security.Interface/MonoTlsProvider.cs.
*
*/
static partial class MonoTlsProviderFactory
{
#region Internal API
/*
* APIs in this section are for consumption within System.dll only - do not access via
* reflection or from friend assemblies.
*
* @IMonoTlsProvider is defined as empty interface outside 'SECURITY_DEP', so we don't need
* this conditional here.
*/
internal static IMonoTlsProvider GetProviderInternal ()
{
#if SECURITY_DEP
lock (locker) {
InitializeInternal ();
return defaultProvider;
}
#else
throw new NotSupportedException ("TLS Support not available.");
#endif
}
#if SECURITY_DEP
internal static void InitializeInternal ()
{
lock (locker) {
if (initialized)
return;
MSI.MonoTlsProvider provider;
try {
provider = CreateDefaultProviderImpl ();
} catch (Exception ex) {
throw new NotSupportedException ("TLS Support not available.", ex);
}
if (provider == null)
throw new NotSupportedException ("TLS Support not available.");
defaultProvider = new Private.MonoTlsProviderWrapper (provider);
initialized = true;
}
}
internal static void InitializeInternal (string provider)
{
lock (locker) {
if (initialized)
throw new NotSupportedException ("TLS Subsystem already initialized.");
var msiProvider = LookupProvider (provider, true);
defaultProvider = new Private.MonoTlsProviderWrapper (msiProvider);
initialized = true;
}
}
[MethodImpl (MethodImplOptions.InternalCall)]
internal extern static bool IsBtlsSupported ();
static object locker = new object ();
static bool initialized;
static IMonoTlsProvider defaultProvider;
#endif
#endregion
#if SECURITY_DEP
static Dictionary<string,string> providerRegistration;
static Type LookupProviderType (string name, bool throwOnError)
{
lock (locker) {
InitializeProviderRegistration ();
string typeName;
if (!providerRegistration.TryGetValue (name, out typeName)) {
if (throwOnError)
throw new NotSupportedException (string.Format ("No such TLS Provider: `{0}'.", name));
return null;
}
var type = Type.GetType (typeName, false);
if (type == null && throwOnError)
throw new NotSupportedException (string.Format ("Could not find TLS Provider: `{0}'.", typeName));
return type;
}
}
static MSI.MonoTlsProvider LookupProvider (string name, bool throwOnError)
{
var type = LookupProviderType (name, throwOnError);
if (type == null)
return null;
try {
return (MSI.MonoTlsProvider)Activator.CreateInstance (type, true);
} catch (Exception ex) {
throw new NotSupportedException (string.Format ("Unable to instantiate TLS Provider `{0}'.", type), ex);
}
}
static void InitializeProviderRegistration ()
{
lock (locker) {
if (providerRegistration != null)
return;
providerRegistration = new Dictionary<string,string> ();
string legacyProvider = "Mono.Net.Security.LegacyTlsProvider";
providerRegistration.Add ("legacy", legacyProvider);
string defaultProvider = null;
if (IsBtlsSupported ()) {
var btlsProvider = "Mono.Btls.MonoBtlsProvider";
providerRegistration.Add ("btls", btlsProvider);
defaultProvider = btlsProvider;
}
if (Platform.IsMacOS) {
var appleProvider = "Mono.AppleTls.AppleTlsProvider";
providerRegistration.Add ("apple", appleProvider);
defaultProvider = appleProvider;
}
if (defaultProvider == null)
defaultProvider = legacyProvider;
providerRegistration.Add ("default", defaultProvider);
X509Helper2.Initialize ();
}
}
#if !MONODROID && !MONOTOUCH && !XAMMAC
static MSI.MonoTlsProvider TryDynamicLoad ()
{
var variable = Environment.GetEnvironmentVariable ("MONO_TLS_PROVIDER");
if (string.IsNullOrEmpty (variable))
variable = "default";
return LookupProvider (variable, true);
}
static MSI.MonoTlsProvider CreateDefaultProviderImpl ()
{
var provider = TryDynamicLoad ();
if (provider != null)
return provider;
return new LegacyTlsProvider ();
}
#endif
#region Mono.Security visible API
/*
* "Public" section, intended to be consumed via reflection.
*
* Mono.Security.dll provides a public wrapper around these.
*/
internal static MSI.MonoTlsProvider GetProvider ()
{
var provider = GetProviderInternal ();
if (provider == null)
throw new NotSupportedException ("No TLS Provider available.");
return provider.Provider;
}
internal static bool IsProviderSupported (string name)
{
return LookupProvider (name, false) != null;
}
internal static MSI.MonoTlsProvider GetProvider (string name)
{
return LookupProvider (name, false);
}
internal static bool IsInitialized {
get {
lock (locker) {
return initialized;
}
}
}
internal static void Initialize ()
{
#if SECURITY_DEP
InitializeInternal ();
#else
throw new NotSupportedException ("TLS Support not available.");
#endif
}
internal static void Initialize (string provider)
{
#if SECURITY_DEP
InitializeInternal (provider);
#else
throw new NotSupportedException ("TLS Support not available.");
#endif
}
internal static HttpWebRequest CreateHttpsRequest (Uri requestUri, MSI.MonoTlsProvider provider, MSI.MonoTlsSettings settings)
{
lock (locker) {
var internalProvider = provider != null ? new Private.MonoTlsProviderWrapper (provider) : null;
return new HttpWebRequest (requestUri, internalProvider, settings);
}
}
internal static HttpListener CreateHttpListener (X509Certificate certificate, MSI.MonoTlsProvider provider, MSI.MonoTlsSettings settings)
{
lock (locker) {
var internalProvider = provider != null ? new Private.MonoTlsProviderWrapper (provider) : null;
return new HttpListener (certificate, internalProvider, settings);
}
}
#endregion
#endif
}
}
#endif
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