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// Copyright (C) 2010 Novell, Inc (http://www.novell.com)
// Copyright 2012-2014 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 SECURITY_DEP
using System;
using System.Runtime.InteropServices;
using System.Security.Cryptography.X509Certificates;
namespace System.Security.Cryptography.X509Certificates {
static class OSX509Certificates {
public const string SecurityLibrary = "/System/Library/Frameworks/Security.framework/Security";
public const string CoreFoundationLibrary = "/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation";
[DllImport (SecurityLibrary)]
extern static IntPtr SecCertificateCreateWithData (IntPtr allocator, IntPtr nsdataRef);
[DllImport (SecurityLibrary)]
extern static /* OSStatus */ int SecTrustCreateWithCertificates (IntPtr certOrCertArray, IntPtr policies, out IntPtr sectrustref);
[DllImport (SecurityLibrary)]
extern static /* OSStatus */ int SecTrustSetAnchorCertificates (IntPtr /* SecTrustRef */ trust, IntPtr /* CFArrayRef */ anchorCertificates);
[DllImport (SecurityLibrary)]
extern static IntPtr SecPolicyCreateSSL ([MarshalAs (UnmanagedType.I1)] bool server, IntPtr cfStringHostname);
[DllImport (SecurityLibrary)]
extern static /* OSStatus */ int SecTrustEvaluate (IntPtr secTrustRef, out SecTrustResult secTrustResultTime);
[DllImport (CoreFoundationLibrary, CharSet=CharSet.Unicode)]
extern static IntPtr CFStringCreateWithCharacters (IntPtr allocator, string str, /* CFIndex */ IntPtr count);
[DllImport (CoreFoundationLibrary)]
unsafe extern static IntPtr CFDataCreate (IntPtr allocator, byte *bytes, /* CFIndex */ IntPtr length);
[DllImport (CoreFoundationLibrary)]
extern static void CFRetain (IntPtr handle);
[DllImport (CoreFoundationLibrary)]
extern static void CFRelease (IntPtr handle);
[DllImport (CoreFoundationLibrary)]
extern static IntPtr CFArrayCreate (IntPtr allocator, IntPtr values, /* CFIndex */ IntPtr numValues, IntPtr callbacks);
// uint32_t
public enum SecTrustResult {
Invalid,
Proceed,
Confirm,
Deny,
Unspecified,
RecoverableTrustFailure,
FatalTrustFailure,
ResultOtherError,
}
static IntPtr MakeCFData (byte [] data)
{
unsafe {
fixed (byte *ptr = &data [0])
return CFDataCreate (IntPtr.Zero, ptr, (IntPtr) data.Length);
}
}
static unsafe IntPtr FromIntPtrs (IntPtr [] values)
{
fixed (IntPtr* pv = values) {
return CFArrayCreate (
IntPtr.Zero,
(IntPtr) pv,
(IntPtr) values.Length,
IntPtr.Zero);
}
}
static IntPtr GetCertificate (X509Certificate certificate)
{
var handle = certificate.Impl.GetNativeAppleCertificate ();
if (handle != IntPtr.Zero) {
CFRetain (handle);
return handle;
}
var dataPtr = MakeCFData (certificate.GetRawCertData ());
handle = SecCertificateCreateWithData (IntPtr.Zero, dataPtr);
CFRelease (dataPtr);
return handle;
}
public static SecTrustResult TrustEvaluateSsl (X509CertificateCollection certificates, X509CertificateCollection anchors, string host)
{
if (certificates == null)
return SecTrustResult.Deny;
try {
return _TrustEvaluateSsl (certificates, anchors, host);
} catch {
return SecTrustResult.Deny;
}
}
static SecTrustResult _TrustEvaluateSsl (X509CertificateCollection certificates, X509CertificateCollection anchors, string hostName)
{
int certCount = certificates.Count;
int anchorCount = anchors != null ? anchors.Count : 0;
IntPtr [] secCerts = new IntPtr [certCount];
IntPtr [] secCertAnchors = new IntPtr [anchorCount];
IntPtr certArray = IntPtr.Zero;
IntPtr anchorArray = IntPtr.Zero;
IntPtr sslsecpolicy = IntPtr.Zero;
IntPtr host = IntPtr.Zero;
IntPtr sectrust = IntPtr.Zero;
SecTrustResult result = SecTrustResult.Deny;
try {
for (int i = 0; i < certCount; i++) {
secCerts [i] = GetCertificate (certificates [i]);
if (secCerts [i] == IntPtr.Zero)
return SecTrustResult.Deny;
}
for (int i = 0; i < anchorCount; i++) {
secCertAnchors [i] = GetCertificate (anchors [i]);
if (secCertAnchors [i] == IntPtr.Zero)
return SecTrustResult.Deny;
}
certArray = FromIntPtrs (secCerts);
if (hostName != null)
host = CFStringCreateWithCharacters (IntPtr.Zero, hostName, (IntPtr) hostName.Length);
sslsecpolicy = SecPolicyCreateSSL (true, host);
int code = SecTrustCreateWithCertificates (certArray, sslsecpolicy, out sectrust);
if (code != 0)
return SecTrustResult.Deny;
if (anchorCount > 0) {
anchorArray = FromIntPtrs (secCertAnchors);
SecTrustSetAnchorCertificates (sectrust, anchorArray);
}
code = SecTrustEvaluate (sectrust, out result);
return result;
} finally {
if (certArray != IntPtr.Zero)
CFRelease (certArray);
if (anchorArray != IntPtr.Zero)
CFRelease (anchorArray);
for (int i = 0; i < certCount; i++)
if (secCerts [i] != IntPtr.Zero)
CFRelease (secCerts [i]);
for (int i = 0; i < anchorCount; i++)
if (secCertAnchors [i] != IntPtr.Zero)
CFRelease (secCertAnchors [i]);
if (sslsecpolicy != IntPtr.Zero)
CFRelease (sslsecpolicy);
if (host != IntPtr.Zero)
CFRelease (host);
if (sectrust != IntPtr.Zero)
CFRelease (sectrust);
}
}
}
}
#endif
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