1 // Copyright (C) 2010 Novell, Inc (http://www.novell.com)
2 // Copyright 2012-2014 Xamarin Inc.
4 // Permission is hereby granted, free of charge, to any person obtaining
5 // a copy of this software and associated documentation files (the
6 // "Software"), to deal in the Software without restriction, including
7 // without limitation the rights to use, copy, modify, merge, publish,
8 // distribute, sublicense, and/or sell copies of the Software, and to
9 // permit persons to whom the Software is furnished to do so, subject to
10 // the following conditions:
12 // The above copyright notice and this permission notice shall be
13 // included in all copies or substantial portions of the Software.
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 using System.Runtime.InteropServices;
27 using System.Security.Cryptography.X509Certificates;
29 namespace System.Security.Cryptography.X509Certificates {
31 static class OSX509Certificates {
32 public const string SecurityLibrary = "/System/Library/Frameworks/Security.framework/Security";
33 public const string CoreFoundationLibrary = "/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation";
35 [DllImport (SecurityLibrary)]
36 extern static IntPtr SecCertificateCreateWithData (IntPtr allocator, IntPtr nsdataRef);
38 [DllImport (SecurityLibrary)]
39 extern static /* OSStatus */ int SecTrustCreateWithCertificates (IntPtr certOrCertArray, IntPtr policies, out IntPtr sectrustref);
41 [DllImport (SecurityLibrary)]
42 extern static /* OSStatus */ int SecTrustSetAnchorCertificates (IntPtr /* SecTrustRef */ trust, IntPtr /* CFArrayRef */ anchorCertificates);
44 [DllImport (SecurityLibrary)]
45 extern static IntPtr SecPolicyCreateSSL ([MarshalAs (UnmanagedType.I1)] bool server, IntPtr cfStringHostname);
47 [DllImport (SecurityLibrary)]
48 extern static /* OSStatus */ int SecTrustEvaluate (IntPtr secTrustRef, out SecTrustResult secTrustResultTime);
50 [DllImport (CoreFoundationLibrary, CharSet=CharSet.Unicode)]
51 extern static IntPtr CFStringCreateWithCharacters (IntPtr allocator, string str, /* CFIndex */ IntPtr count);
53 [DllImport (CoreFoundationLibrary)]
54 unsafe extern static IntPtr CFDataCreate (IntPtr allocator, byte *bytes, /* CFIndex */ IntPtr length);
56 [DllImport (CoreFoundationLibrary)]
57 extern static void CFRetain (IntPtr handle);
59 [DllImport (CoreFoundationLibrary)]
60 extern static void CFRelease (IntPtr handle);
62 [DllImport (CoreFoundationLibrary)]
63 extern static IntPtr CFArrayCreate (IntPtr allocator, IntPtr values, /* CFIndex */ IntPtr numValues, IntPtr callbacks);
66 public enum SecTrustResult {
72 RecoverableTrustFailure,
77 static IntPtr MakeCFData (byte [] data)
80 fixed (byte *ptr = &data [0])
81 return CFDataCreate (IntPtr.Zero, ptr, (IntPtr) data.Length);
85 static unsafe IntPtr FromIntPtrs (IntPtr [] values)
87 fixed (IntPtr* pv = values) {
88 return CFArrayCreate (
91 (IntPtr) values.Length,
96 static IntPtr GetCertificate (X509Certificate certificate)
98 var handle = certificate.Impl.GetNativeAppleCertificate ();
99 if (handle != IntPtr.Zero) {
103 var dataPtr = MakeCFData (certificate.GetRawCertData ());
104 handle = SecCertificateCreateWithData (IntPtr.Zero, dataPtr);
109 public static SecTrustResult TrustEvaluateSsl (X509CertificateCollection certificates, X509CertificateCollection anchors, string host)
111 if (certificates == null)
112 return SecTrustResult.Deny;
115 return _TrustEvaluateSsl (certificates, anchors, host);
117 return SecTrustResult.Deny;
121 static SecTrustResult _TrustEvaluateSsl (X509CertificateCollection certificates, X509CertificateCollection anchors, string hostName)
123 int certCount = certificates.Count;
124 int anchorCount = anchors != null ? anchors.Count : 0;
125 IntPtr [] secCerts = new IntPtr [certCount];
126 IntPtr [] secCertAnchors = new IntPtr [anchorCount];
127 IntPtr certArray = IntPtr.Zero;
128 IntPtr anchorArray = IntPtr.Zero;
129 IntPtr sslsecpolicy = IntPtr.Zero;
130 IntPtr host = IntPtr.Zero;
131 IntPtr sectrust = IntPtr.Zero;
132 SecTrustResult result = SecTrustResult.Deny;
135 for (int i = 0; i < certCount; i++) {
136 secCerts [i] = GetCertificate (certificates [i]);
137 if (secCerts [i] == IntPtr.Zero)
138 return SecTrustResult.Deny;
141 for (int i = 0; i < anchorCount; i++) {
142 secCertAnchors [i] = GetCertificate (anchors [i]);
143 if (secCertAnchors [i] == IntPtr.Zero)
144 return SecTrustResult.Deny;
147 certArray = FromIntPtrs (secCerts);
149 if (!string.IsNullOrEmpty (hostName))
150 host = CFStringCreateWithCharacters (IntPtr.Zero, hostName, (IntPtr) hostName.Length);
151 sslsecpolicy = SecPolicyCreateSSL (true, host);
153 int code = SecTrustCreateWithCertificates (certArray, sslsecpolicy, out sectrust);
155 return SecTrustResult.Deny;
157 if (anchorCount > 0) {
158 anchorArray = FromIntPtrs (secCertAnchors);
159 SecTrustSetAnchorCertificates (sectrust, anchorArray);
162 code = SecTrustEvaluate (sectrust, out result);
165 if (certArray != IntPtr.Zero)
166 CFRelease (certArray);
168 if (anchorArray != IntPtr.Zero)
169 CFRelease (anchorArray);
171 for (int i = 0; i < certCount; i++)
172 if (secCerts [i] != IntPtr.Zero)
173 CFRelease (secCerts [i]);
175 for (int i = 0; i < anchorCount; i++)
176 if (secCertAnchors [i] != IntPtr.Zero)
177 CFRelease (secCertAnchors [i]);
179 if (sslsecpolicy != IntPtr.Zero)
180 CFRelease (sslsecpolicy);
181 if (host != IntPtr.Zero)
183 if (sectrust != IntPtr.Zero)
184 CFRelease (sectrust);