[BTLS]: Add managed BTLS sources.

* external/boringssl: unmanaged code from Google (added earlier).

* mono/btls: unmanaged BTLS lives here (added earlier).

* System/Mono.Btls: managed BTLS lives here.

* Mono.Btls.Interface: The purpose of this assembly is to allow test suites
  such as xamarin/web-tests to test parts of the BTLS APIs without making
  System.dll's internals visible.  It is not a stable and maintained API.

21 files changed, 1237 insertions, 0 deletions

diff --git a/mcs/class/Mono.Btls.Interface/Makefile b/mcs/class/Mono.Btls.Interface/Makefile
new file mode 100644
index 00000000000..ea7e128a3f0
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Makefile
@@ -0,0 +1,12 @@
+thisdir = class/Mono.Btls.Interface
+SUBDIRS = 
+include ../../build/rules.make
+
+LIBRARY = Mono.Btls.Interface.dll
+LIB_REFS = System Mono.Security
+LIB_MCS_FLAGS = -unsafe -nowarn:1030 -keyfile:../mono.pub -delaysign -d:SECURITY_DEP
+
+include ../../build/library.make
+
+$(the_lib): ../Mono.Security/Makefile
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface.dll.sources b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface.dll.sources
new file mode 100644
index 00000000000..710e06d35b9
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface.dll.sources
@@ -0,0 +1,22 @@
+./Properties/AssemblyInfo.cs
+../../build/common/Consts.cs
+../../build/common/Locale.cs
+../../build/common/MonoTODOAttribute.cs
+
+Mono.Btls.Interface/BtlsObject.cs
+Mono.Btls.Interface/BtlsProvider.cs
+Mono.Btls.Interface/BtlsX509.cs
+Mono.Btls.Interface/BtlsX509Chain.cs
+Mono.Btls.Interface/BtlsX509Error.cs
+Mono.Btls.Interface/BtlsX509Format.cs
+Mono.Btls.Interface/BtlsX509Lookup.cs
+Mono.Btls.Interface/BtlsX509Name.cs
+Mono.Btls.Interface/BtlsX509Purpose.cs
+Mono.Btls.Interface/BtlsX509Store.cs
+Mono.Btls.Interface/BtlsX509StoreCtx.cs
+Mono.Btls.Interface/BtlsX509StoreManager.cs
+Mono.Btls.Interface/BtlsX509StoreType.cs
+Mono.Btls.Interface/BtlsX509TrustKind.cs
+Mono.Btls.Interface/BtlsX509VerifyFlags.cs
+Mono.Btls.Interface/BtlsX509VerifyParam.cs
+Mono.Btls.Interface/VersionInfo.cs
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsObject.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsObject.cs
new file mode 100644
index 00000000000..b2e607c1773
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsObject.cs
@@ -0,0 +1,73 @@
+//
+// BtlsObject.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+
+namespace Mono.Btls.Interface
+{
+	public abstract class BtlsObject : IDisposable
+	{
+		MonoBtlsObject instance;
+
+		internal MonoBtlsObject Instance {
+			get {
+				if (!IsValid)
+					throw new ObjectDisposedException (GetType ().Name);
+				return instance;
+			}
+		}
+
+		internal BtlsObject (MonoBtlsObject instance)
+		{
+			this.instance = instance;
+		}
+
+		public bool IsValid {
+			get { return instance != null && instance.IsValid; }
+		}
+
+		protected void Dispose (bool disposing)
+		{
+			if (disposing) {
+				if (instance != null) {
+					instance.Dispose ();
+					instance = null;
+				}
+			}
+		}
+
+		public void Dispose ()
+		{
+			Dispose (true);
+			GC.SuppressFinalize (this);
+		}
+
+		~BtlsObject ()
+		{
+			Dispose (false);
+		}
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsProvider.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsProvider.cs
new file mode 100644
index 00000000000..6a8d8106253
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsProvider.cs
@@ -0,0 +1,106 @@
+//
+// BtlsProvider.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+using Mono.Security.Interface;
+using System.Security.Cryptography.X509Certificates;
+
+namespace Mono.Btls.Interface
+{
+	public static class BtlsProvider
+	{
+		public static bool IsSupported ()
+		{
+			return MonoBtlsProvider.IsSupported ();
+		}
+
+		public static MonoTlsProvider GetProvider ()
+		{
+			return new MonoBtlsProvider ();
+		}
+
+		public static BtlsX509 CreateNative (byte[] data, BtlsX509Format format)
+		{
+			var x509 = MonoBtlsX509.LoadFromData (data, (MonoBtlsX509Format)format);
+			return new BtlsX509 (x509);
+		}
+
+		public static X509Certificate CreateCertificate (byte[] data, BtlsX509Format format, bool disallowFallback = false)
+		{
+			return MonoBtlsProvider.CreateCertificate (data, (MonoBtlsX509Format)format, disallowFallback);
+		}
+
+		public static X509Certificate2 CreateCertificate2 (byte[] data, BtlsX509Format format, bool disallowFallback = false)
+		{
+			return MonoBtlsProvider.CreateCertificate2 (data, (MonoBtlsX509Format)format, disallowFallback);
+		}
+
+		public static X509Certificate2 CreateCertificate2 (byte[] data, string password, bool disallowFallback = false)
+		{
+			return MonoBtlsProvider.CreateCertificate2 (data, password, disallowFallback);
+		}
+
+		public static BtlsX509Chain CreateNativeChain ()
+		{
+			return new BtlsX509Chain (new MonoBtlsX509Chain ());
+		}
+
+		public static BtlsX509Store CreateNativeStore ()
+		{
+			return new BtlsX509Store (new MonoBtlsX509Store ());
+		}
+
+		public static BtlsX509StoreCtx CreateNativeStoreCtx ()
+		{
+			return new BtlsX509StoreCtx (new MonoBtlsX509StoreCtx ());
+		}
+
+		public static X509Chain CreateChain ()
+		{
+			return MonoBtlsProvider.CreateChain ();
+		}
+
+		public static string GetSystemStoreLocation ()
+		{
+			return MonoBtlsProvider.GetSystemStoreLocation ();
+		}
+
+		public static BtlsX509VerifyParam GetVerifyParam_SslClient ()
+		{
+			return new BtlsX509VerifyParam (MonoBtlsX509VerifyParam.GetSslClient ());
+		}
+
+		public static BtlsX509VerifyParam GetVerifyParam_SslServer ()
+		{
+			return new BtlsX509VerifyParam (MonoBtlsX509VerifyParam.GetSslServer ());
+		}
+
+		public static X509Chain GetManagedChain (BtlsX509Chain chain)
+		{
+			return MonoBtlsProvider.GetManagedChain (chain.Instance);
+		}
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509.cs
new file mode 100644
index 00000000000..abcdafbf006
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509.cs
@@ -0,0 +1,132 @@
+//
+// BtlsX509.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace Mono.Btls.Interface
+{
+	public class BtlsX509 : BtlsObject
+	{
+		new internal MonoBtlsX509 Instance {
+			get { return (MonoBtlsX509)base.Instance; }
+		}
+
+		internal BtlsX509 (MonoBtlsX509 x509)
+			: base (x509)
+		{
+		}
+
+		public BtlsX509Name GetSubjectName ()
+		{
+			return new BtlsX509Name (Instance.GetSubjectName ());
+		}
+
+		public BtlsX509Name GetIssuerName ()
+		{
+			return new BtlsX509Name (Instance.GetIssuerName ());
+		}
+
+		public string GetSubjectNameString ()
+		{
+			return Instance.GetSubjectNameString ();
+		}
+
+		public string GetIssuerNameString ()
+		{
+			return Instance.GetIssuerNameString ();
+		}
+
+		public byte[] GetRawData (BtlsX509Format format)
+		{
+			return Instance.GetRawData ((MonoBtlsX509Format)format);
+		}
+
+		public byte[] GetCertHash ()
+		{
+			return Instance.GetCertHash ();
+		}
+
+		public DateTime GetNotBefore ()
+		{
+			return Instance.GetNotBefore ();
+		}
+
+		public DateTime GetNotAfter ()
+		{
+			return Instance.GetNotAfter ();
+		}
+
+		public byte[] GetPublicKeyData ()
+		{
+			return Instance.GetPublicKeyData ();
+		}
+
+		public byte[] GetSerialNumber (bool mono_style)
+		{
+			return Instance.GetSerialNumber (mono_style);
+		}
+
+		public int GetVersion ()
+		{
+			return Instance.GetVersion ();
+		}
+
+		public Oid GetSignatureAlgorithm ()
+		{
+			return Instance.GetSignatureAlgorithm ();
+		}
+
+		public AsnEncodedData GetPublicKeyAsn1 ()
+		{
+			return Instance.GetPublicKeyAsn1 ();
+		}
+
+		public AsnEncodedData GetPublicKeyParameters ()
+		{
+			return Instance.GetPublicKeyParameters (); 
+		}
+
+		public long GetSubjectNameHash ()
+		{
+			using (var name = GetSubjectName ())
+				return name.GetHash ();
+		}
+
+		public void Print (Stream stream)
+		{
+			using (var bio = MonoBtlsBio.CreateMonoStream (stream))
+				Instance.Print (bio);
+		}
+
+		public void ExportAsPEM (Stream stream, bool includeHumanReadableForm)
+		{
+			using (var bio = MonoBtlsBio.CreateMonoStream (stream))
+				Instance.ExportAsPEM (bio, includeHumanReadableForm);
+		}
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Chain.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Chain.cs
new file mode 100644
index 00000000000..38e9ec5814e
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Chain.cs
@@ -0,0 +1,58 @@
+//
+// BtlsX509Chain.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+
+namespace Mono.Btls.Interface
+{
+	public class BtlsX509Chain : BtlsObject
+	{
+		new internal MonoBtlsX509Chain Instance {
+			get { return (MonoBtlsX509Chain)base.Instance; }
+		}
+
+		internal BtlsX509Chain (MonoBtlsX509Chain chain)
+			: base (chain)
+		{
+		}
+
+		public int Count {
+			get { return Instance.Count; }
+		}
+
+		public BtlsX509 this[int index] {
+			get {
+				var x509 = Instance.GetCertificate (index);
+				return new BtlsX509 (x509.Copy ());
+			}
+		}
+
+		public void Add (BtlsX509 x509)
+		{
+			Instance.AddCertificate (x509.Instance);
+		}
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Error.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Error.cs
new file mode 100644
index 00000000000..089b4f23e09
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Error.cs
@@ -0,0 +1,110 @@
+//
+// BtlsX509Error.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+namespace Mono.Btls.Interface
+{
+	// Keep in sync with NativeBoringX509Error
+	public enum BtlsX509Error
+	{
+		OK = 0,
+		/* illegal error (for uninitialized values, to avoid X509_V_OK): 1 */
+
+		UNABLE_TO_GET_ISSUER_CERT = 2,
+		UNABLE_TO_GET_CRL = 3,
+		UNABLE_TO_DECRYPT_CERT_SIGNATURE = 4,
+		UNABLE_TO_DECRYPT_CRL_SIGNATURE = 5,
+		UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY = 6,
+		CERT_SIGNATURE_FAILURE = 7,
+		CRL_SIGNATURE_FAILURE = 8,
+		CERT_NOT_YET_VALID = 9,
+		CERT_HAS_EXPIRED = 10,
+		CRL_NOT_YET_VALID = 11,
+		CRL_HAS_EXPIRED = 12,
+		ERROR_IN_CERT_NOT_BEFORE_FIELD = 13,
+		ERROR_IN_CERT_NOT_AFTER_FIELD = 14,
+		ERROR_IN_CRL_LAST_UPDATE_FIELD = 15,
+		ERROR_IN_CRL_NEXT_UPDATE_FIELD = 16,
+		OUT_OF_MEM = 17,
+		DEPTH_ZERO_SELF_SIGNED_CERT = 18,
+		SELF_SIGNED_CERT_IN_CHAIN = 19,
+		UNABLE_TO_GET_ISSUER_CERT_LOCALLY = 20,
+		UNABLE_TO_VERIFY_LEAF_SIGNATURE = 21,
+		CERT_CHAIN_TOO_LONG = 22,
+		CERT_REVOKED = 23,
+		INVALID_CA = 24,
+		PATH_LENGTH_EXCEEDED = 25,
+		INVALID_PURPOSE = 26,
+		CERT_UNTRUSTED = 27,
+		CERT_REJECTED = 28,
+		/* These are 'informational' when looking for issuer cert */
+		SUBJECT_ISSUER_MISMATCH = 29,
+		AKID_SKID_MISMATCH = 30,
+		AKID_ISSUER_SERIAL_MISMATCH = 31,
+		KEYUSAGE_NO_CERTSIGN = 32,
+
+		UNABLE_TO_GET_CRL_ISSUER = 33,
+		UNHANDLED_CRITICAL_EXTENSION = 34,
+		KEYUSAGE_NO_CRL_SIGN = 35,
+		UNHANDLED_CRITICAL_CRL_EXTENSION = 36,
+		INVALID_NON_CA = 37,
+		PROXY_PATH_LENGTH_EXCEEDED = 38,
+		KEYUSAGE_NO_DIGITAL_SIGNATURE = 39,
+		PROXY_CERTIFICATES_NOT_ALLOWED = 40,
+
+		INVALID_EXTENSION = 41,
+		INVALID_POLICY_EXTENSION = 42,
+		NO_EXPLICIT_POLICY = 43,
+		DIFFERENT_CRL_SCOPE = 44,
+		UNSUPPORTED_EXTENSION_FEATURE = 45,
+
+		UNNESTED_RESOURCE = 46,
+
+		PERMITTED_VIOLATION = 47,
+		EXCLUDED_VIOLATION = 48,
+		SUBTREE_MINMAX = 49,
+		UNSUPPORTED_CONSTRAINT_TYPE = 51,
+		UNSUPPORTED_CONSTRAINT_SYNTAX = 52,
+		UNSUPPORTED_NAME_SYNTAX = 53,
+		CRL_PATH_VALIDATION_ERROR = 54,
+
+		/* Suite B mode algorithm violation */
+		SUITE_B_INVALID_VERSION = 56,
+		SUITE_B_INVALID_ALGORITHM = 57,
+		SUITE_B_INVALID_CURVE = 58,
+		SUITE_B_INVALID_SIGNATURE_ALGORITHM = 59,
+		SUITE_B_LOS_NOT_ALLOWED = 60,
+		SUITE_B_CANNOT_SIGN_P_384_WITH_P_256 = 61,
+
+		/* Host, email and IP check errors */
+		HOSTNAME_MISMATCH = 62,
+		EMAIL_MISMATCH = 63,
+		IP_ADDRESS_MISMATCH = 64,
+
+		/* The application is not happy */
+		APPLICATION_VERIFICATION = 50
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Format.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Format.cs
new file mode 100644
index 00000000000..6ff63cec120
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Format.cs
@@ -0,0 +1,37 @@
+//
+// BtlsX509Format.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+
+namespace Mono.Btls.Interface
+{
+	// Keep in sync with NativeBoringX509Format
+	public enum BtlsX509Format
+	{
+		DER = 1,
+		PEM = 2
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Lookup.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Lookup.cs
new file mode 100644
index 00000000000..836088fdd5b
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Lookup.cs
@@ -0,0 +1,72 @@
+//
+// BtlsX509Lookup.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace Mono.Btls.Interface
+{
+	public class BtlsX509Lookup : BtlsObject
+	{
+		new internal MonoBtlsX509Lookup Instance {
+			get { return (MonoBtlsX509Lookup)base.Instance; }
+		}
+
+		internal BtlsX509Lookup (MonoBtlsX509Lookup lookup)
+			: base (lookup)
+		{
+		}
+
+		public void Initialize ()
+		{
+			Instance.Initialize ();
+		}
+
+		public void Shutdown ()
+		{
+			Instance.Shutdown ();
+		}
+
+		public BtlsX509 LookupBySubject (BtlsX509Name name)
+		{
+			var x509 = Instance.LookupBySubject (name.Instance);
+			if (x509 == null)
+				return null;
+
+			return new BtlsX509 (x509);
+		}
+
+		public void LoadFile (string file, BtlsX509Format type)
+		{
+			Instance.LoadFile (file, (MonoBtlsX509FileType)type);
+		}
+
+		public void AddDirectory (string dir, BtlsX509Format type)
+		{
+			Instance.AddDirectory (dir, (MonoBtlsX509FileType)type);
+		}
+	}
+}
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Name.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Name.cs
new file mode 100644
index 00000000000..69ca5a9e201
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Name.cs
@@ -0,0 +1,62 @@
+//
+// BtlsX509Name.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+
+namespace Mono.Btls.Interface
+{
+	public class BtlsX509Name : BtlsObject
+	{
+		new internal MonoBtlsX509Name Instance {
+			get { return (MonoBtlsX509Name)base.Instance; }
+		}
+
+		internal BtlsX509Name (MonoBtlsX509Name name)
+			: base (name)
+		{
+		}
+
+		public string GetString ()
+		{
+			return Instance.GetString ();
+		}
+
+		public byte[] GetRawData (bool use_canon_enc)
+		{
+			return Instance.GetRawData (use_canon_enc);
+		}
+
+		public long GetHash ()
+		{
+			return Instance.GetHash ();
+		}
+
+		public long GetHashOld ()
+		{
+			return Instance.GetHashOld ();
+		}
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Purpose.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Purpose.cs
new file mode 100644
index 00000000000..ac906dfe85c
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Purpose.cs
@@ -0,0 +1,43 @@
+//
+// BtlsX509Purpose.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+namespace Mono.Btls.Interface
+{
+	// Keep in sync with NativeBoringX509Purpose
+	public enum BtlsX509Purpose
+	{
+		SSL_CLIENT = 1,
+		SSL_SERVER = 2,
+		NS_SSL_SERVER = 3,
+		SMIME_SIGN = 4,
+		SMIME_ENCRYPT = 5,
+		CRL_SIGN = 6,
+		ANY = 7,
+		OCSP_HELPER = 8,
+		TIMESTAMP_SIGN = 9,
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Store.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Store.cs
new file mode 100644
index 00000000000..7b8f03fc7a6
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509Store.cs
@@ -0,0 +1,91 @@
+//
+// BtlsX509Store.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+using System.Security.Cryptography.X509Certificates;
+
+namespace Mono.Btls.Interface
+{
+	public class BtlsX509Store : BtlsObject
+	{
+		new internal MonoBtlsX509Store Instance {
+			get { return (MonoBtlsX509Store)base.Instance; }
+		}
+
+		internal BtlsX509Store (MonoBtlsX509Store store)
+			: base (store)
+		{
+		}
+
+		public void LoadLocations (string file, string path)
+		{
+			Instance.LoadLocations (file, path);
+		}
+
+		public void AddTrustedRoots ()
+		{
+			Instance.AddTrustedRoots ();
+		}
+
+		public void AddCertificate (BtlsX509 x509)
+		{
+			Instance.AddCertificate (x509.Instance);
+		}
+
+		public int GetCount ()
+		{
+			return Instance.GetCount ();
+		}
+
+		public void AddLookup (X509CertificateCollection certificates, BtlsX509TrustKind trust)
+		{
+			Instance.AddCollection (certificates, (MonoBtlsX509TrustKind)trust);
+		}
+
+		static MonoBtlsX509FileType GetFileType (BtlsX509Format format)
+		{
+			switch (format) {
+			case BtlsX509Format.DER:
+				return MonoBtlsX509FileType.ASN1;
+			case BtlsX509Format.PEM:
+				return MonoBtlsX509FileType.PEM;
+			default:
+				throw new NotSupportedException ();
+			}
+		}
+
+		public void AddDirectoryLookup (string dir, BtlsX509Format format)
+		{
+			Instance.AddDirectoryLookup (dir, GetFileType (format));
+		}
+
+		public void AddFileLookup (string file, BtlsX509Format format)
+		{
+			Instance.AddFileLookup (file, GetFileType (format));
+		}
+
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509StoreCtx.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509StoreCtx.cs
new file mode 100644
index 00000000000..97d4a066f66
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509StoreCtx.cs
@@ -0,0 +1,71 @@
+//
+// BtlsX509StoreCtx.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+namespace Mono.Btls.Interface
+{
+	public class BtlsX509StoreCtx : BtlsObject
+	{
+		new internal MonoBtlsX509StoreCtx Instance {
+			get { return (MonoBtlsX509StoreCtx)base.Instance; }
+		}
+
+		internal BtlsX509StoreCtx (MonoBtlsX509StoreCtx ctx)
+			: base (ctx)
+		{
+		}
+
+		public void Initialize (BtlsX509Store store, BtlsX509Chain chain)
+		{
+			Instance.Initialize (store.Instance, chain.Instance);
+		}
+
+		public void SetVerifyParam (BtlsX509VerifyParam param)
+		{
+			Instance.SetVerifyParam (param.Instance);
+		}
+
+		public int Verify ()
+		{
+			return Instance.Verify ();
+		}
+
+		public BtlsX509Error GetError ()
+		{
+			return (BtlsX509Error)Instance.GetError ();
+		}
+
+		public Exception GetException ()
+		{
+			return Instance.GetException ();
+		}
+
+		public BtlsX509Chain GetChain ()
+		{
+			return new BtlsX509Chain (Instance.GetChain ());
+		}
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509StoreManager.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509StoreManager.cs
new file mode 100644
index 00000000000..1989ff44f27
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509StoreManager.cs
@@ -0,0 +1,44 @@
+//
+// BtlsX509StoreManager.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace Mono.Btls.Interface
+{
+	public static class BtlsX509StoreManager
+	{
+		public static bool HasStore (BtlsX509StoreType type)
+		{
+			return MonoBtlsX509StoreManager.HasStore ((MonoBtlsX509StoreType)type);
+		}
+
+		public static string GetStorePath (BtlsX509StoreType type)
+		{
+			return MonoBtlsX509StoreManager.GetStorePath ((MonoBtlsX509StoreType)type);
+		}
+	}
+}
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509StoreType.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509StoreType.cs
new file mode 100644
index 00000000000..acdfb98d4c9
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509StoreType.cs
@@ -0,0 +1,43 @@
+//
+// BtlsX509StoreType.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace Mono.Btls.Interface
+{
+	// Keep in sync with MonoBtlsX509StoreType
+	public enum BtlsX509StoreType
+	{
+		Custom,
+		MachineTrustedRoots,
+		MachineIntermediateCA,
+		MachineUntrusted,
+		UserTrustedRoots,
+		UserIntermediateCA,
+		UserUntrusted
+	}
+}
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509TrustKind.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509TrustKind.cs
new file mode 100644
index 00000000000..9338ec61dbf
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509TrustKind.cs
@@ -0,0 +1,42 @@
+//
+// BtlsX509TrustKind.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+namespace Mono.Btls.Interface
+{
+	// Keep in sync with MonoBtlsX509TrustKind
+	[Flags]
+	public enum BtlsX509TrustKind
+	{
+		DEFAULT		= 0,
+		TRUST_CLIENT	= 1,
+		TRUST_SERVER	= 2,
+		TRUST_ALL	= 4,
+		REJECT_CLIENT	= 32,
+		REJECT_SERVER	= 64,
+		REJECT_ALL	= 128
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509VerifyFlags.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509VerifyFlags.cs
new file mode 100644
index 00000000000..02640c82a17
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509VerifyFlags.cs
@@ -0,0 +1,38 @@
+//
+// BtlsX509VerifyFlags.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+namespace Mono.Btls.Interface
+{
+	// Keep in sync with NativeBoringX509VerifyFlags
+	public enum BtlsX509VerifyFlags
+	{
+		DEFAULT = 0,
+		CRL_CHECK = 1,
+		CRL_CHECK_ALL = 2,
+		X509_STRIC = 4
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509VerifyParam.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509VerifyParam.cs
new file mode 100644
index 00000000000..8d4e5eba5e3
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/BtlsX509VerifyParam.cs
@@ -0,0 +1,91 @@
+//
+// BtlsX509VerifyParam.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+namespace Mono.Btls.Interface
+{
+	public class BtlsX509VerifyParam : BtlsObject
+	{
+		new internal MonoBtlsX509VerifyParam Instance {
+			get { return (MonoBtlsX509VerifyParam)base.Instance; }
+		}
+
+		internal BtlsX509VerifyParam (MonoBtlsX509VerifyParam param)
+			: base (param)
+		{
+		}
+
+		public BtlsX509VerifyParam Copy ()
+		{
+			return new BtlsX509VerifyParam (Instance.Copy ());
+		}
+
+		public void SetName (string name)
+		{
+			Instance.SetName (name);
+		}
+
+		public void SetHost (string name)
+		{
+			Instance.SetHost (name);
+		}
+
+		public void AddHost (string name)
+		{
+			Instance.AddHost (name);
+		}
+
+		public BtlsX509VerifyFlags GetFlags ()
+		{
+			return (BtlsX509VerifyFlags)Instance.GetFlags ();
+		}
+
+		public void SetFlags (BtlsX509VerifyFlags flags)
+		{
+			Instance.SetFlags ((ulong)flags);
+		}
+
+		public void SetPurpose (BtlsX509Purpose purpose)
+		{
+			Instance.SetPurpose ((MonoBtlsX509Purpose)purpose);
+		}
+
+		public int GetDepth ()
+		{
+			return Instance.GetDepth ();
+		}
+
+		public void SetDepth (int depth)
+		{
+			Instance.SetDepth (depth);
+		}
+
+		public void SetTime (DateTime time)
+		{
+			Instance.SetTime (time);
+		}
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/VersionInfo.cs b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/VersionInfo.cs
new file mode 100644
index 00000000000..726c4ba88b3
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Mono.Btls.Interface/VersionInfo.cs
@@ -0,0 +1,34 @@
+//
+// VersionInfo.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+//
+// 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.
+using System;
+namespace Mono.Btls.Interface
+{
+	public static class VersionInfo
+	{
+		public const string Version = "1.0.0";
+	}
+}
+
diff --git a/mcs/class/Mono.Btls.Interface/Properties/AssemblyInfo.cs b/mcs/class/Mono.Btls.Interface/Properties/AssemblyInfo.cs
new file mode 100644
index 00000000000..5ff0bcb3b95
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/Properties/AssemblyInfo.cs
@@ -0,0 +1,47 @@
+//
+// AssemblyInfo.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2016 Xamarin Inc. (http://www.xamarin.com)
+
+//
+// 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.
+using System;
+using System.Reflection;
+using System.Resources;
+using System.Security;
+using System.Security.Permissions;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about the system assembly
+
+[assembly: AssemblyVersion (Consts.FxVersion)]
+
+[assembly: AssemblyCompany ("MONO development team")]
+[assembly: AssemblyCopyright ("(c) 2016 Xamarin")]
+[assembly: AssemblyDescription ("Mono.Btls.Interface")]
+[assembly: AssemblyProduct ("MONO CLI")]
+[assembly: AssemblyTitle ("Mono.Btls.Interface")]
+[assembly: CLSCompliant (true)]
+[assembly: ComVisible (false)]
+[assembly: NeutralResourcesLanguage ("en-US")]
+
diff --git a/mcs/class/Mono.Btls.Interface/README.md b/mcs/class/Mono.Btls.Interface/README.md
new file mode 100644
index 00000000000..81e169c8b2b
--- /dev/null
+++ b/mcs/class/Mono.Btls.Interface/README.md
@@ -0,0 +1,9 @@
+Mono.Btls.Interface
+===================
+
+The purpose of this assembly is to allow test suites such as xamarin/web-tests
+(https://github.com/xamarin/web-tests/tree/stable) to test parts of BTLS without
+making System.dll internals visible.
+
+It should not be considered a stable and maintained API for third parties.
+