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//
// CertificateValidationHelper.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.
using System;
using System.IO;
using System.Net;
using System.Net.Security;
using System.Threading;
using System.Security.Cryptography.X509Certificates;
using MX = Mono.Security.X509;
using Mono.Net.Security;
namespace Mono.Security.Interface
{
public class ValidationResult
{
bool trusted;
bool user_denied;
int error_code;
MonoSslPolicyErrors? policy_errors;
public ValidationResult (bool trusted, bool user_denied, int error_code, MonoSslPolicyErrors? policy_errors)
{
this.trusted = trusted;
this.user_denied = user_denied;
this.error_code = error_code;
this.policy_errors = policy_errors;
}
internal ValidationResult (bool trusted, bool user_denied, int error_code)
{
this.trusted = trusted;
this.user_denied = user_denied;
this.error_code = error_code;
}
public bool Trusted {
get { return trusted; }
}
public bool UserDenied {
get { return user_denied; }
}
public int ErrorCode {
get { return error_code; }
}
public MonoSslPolicyErrors? PolicyErrors {
get { return policy_errors; }
}
}
/**
* Internal interface - do not implement
*/
public interface ICertificateValidator
{
MonoTlsSettings Settings {
get;
}
/*
* Returns `true` if a client certificate has been selected (which could be `null`).
*/
bool SelectClientCertificate (
string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate,
string[] acceptableIssuers, out X509Certificate clientCertificate);
/*
* If @serverMode is true, then we're a server and want to validate a certificate that we received from a client.
*/
ValidationResult ValidateCertificate (string targetHost, bool serverMode, X509CertificateCollection certificates);
}
public static class CertificateValidationHelper
{
const string SecurityLibrary = "/System/Library/Frameworks/Security.framework/Security";
static readonly bool noX509Chain;
static readonly bool supportsTrustAnchors;
static CertificateValidationHelper ()
{
#if MONOTOUCH || XAMMAC
noX509Chain = true;
supportsTrustAnchors = true;
#elif MONODROID
noX509Chain = true;
supportsTrustAnchors = false;
#else
if (File.Exists (SecurityLibrary)) {
noX509Chain = true;
supportsTrustAnchors = true;
} else {
noX509Chain = false;
supportsTrustAnchors = false;
}
#endif
}
public static bool SupportsX509Chain {
get { return !noX509Chain; }
}
public static bool SupportsTrustAnchors {
get { return supportsTrustAnchors; }
}
/*
* Use this overloaded version in user code.
*/
public static ICertificateValidator GetValidator (MonoTlsSettings settings)
{
return (ICertificateValidator)NoReflectionHelper.GetDefaultValidator (settings);
}
}
}
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