mcs/class/System/System.Security.Cryptography.X509Certificates/OSX509Certificates.cs

   1 // Copyright (C) 2010 Novell, Inc (http://www.novell.com)
   2 // Copyright 2012 Xamarin Inc.
   3 //
   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:
  11 //
  12 // The above copyright notice and this permission notice shall be
  13 // included in all copies or substantial portions of the Software.
  14 //
  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.
  22 //
  23 #if SECURITY_DEP
  24
  25 #if MONOTOUCH || MONODROID
  26 using MSX = Mono.Security.X509;
  27 #else
  28 extern alias MonoSecurity;
  29 using MSX = MonoSecurity::Mono.Security.X509;
  30 #endif
  31
  32 using System;
  33 using System.Runtime.InteropServices;
  34
  35 namespace System.Security.Cryptography.X509Certificates {
  36
  37         static class OSX509Certificates {
  38                 public const string SecurityLibrary = "/System/Library/Frameworks/Security.framework/Security";
  39                 public const string CoreFoundationLibrary = "/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation";
  40
  41                 [DllImport (SecurityLibrary)]
  42                 extern static IntPtr SecCertificateCreateWithData (IntPtr allocator, IntPtr nsdataRef);
  43
  44                 [DllImport (SecurityLibrary)]
  45                 extern static int SecTrustCreateWithCertificates (IntPtr certOrCertArray, IntPtr policies, out IntPtr sectrustref);
  46
  47                 [DllImport (SecurityLibrary)]
  48                 extern static IntPtr SecPolicyCreateSSL (bool server, IntPtr cfStringHostname);
  49
  50                 [DllImport (SecurityLibrary)]
  51                 extern static int SecTrustEvaluate (IntPtr secTrustRef, out SecTrustResult secTrustResultTime);
  52
  53                 [DllImport (CoreFoundationLibrary, CharSet=CharSet.Unicode)]
  54                 extern static IntPtr CFStringCreateWithCharacters (IntPtr allocator, string str, int count);
  55
  56                 [DllImport (CoreFoundationLibrary)]
  57                 unsafe extern static IntPtr CFDataCreate (IntPtr allocator, byte *bytes, IntPtr length);
  58
  59                 [DllImport (CoreFoundationLibrary)]
  60                 unsafe extern static void CFRelease (IntPtr handle);
  61
  62                 [DllImport (CoreFoundationLibrary)]
  63                 extern static IntPtr CFArrayCreate (IntPtr allocator, IntPtr values, IntPtr numValues, IntPtr callbacks);
  64
  65                 public enum SecTrustResult {
  66                         Invalid,
  67                         Proceed,
  68                         Confirm,
  69                         Deny,
  70                         Unspecified,
  71                         RecoverableTrustFailure,
  72                         FatalTrustFailure,
  73                         ResultOtherError,
  74                 }
  75
  76                 static IntPtr MakeCFData (byte [] data)
  77                 {
  78                         unsafe {
  79                                 fixed (byte *ptr = &data [0])
  80                                         return CFDataCreate (IntPtr.Zero, ptr, (IntPtr) data.Length);
  81                         }
  82                 }
  83
  84                 static unsafe IntPtr FromIntPtrs (IntPtr [] values)
  85                 {
  86                         fixed (IntPtr* pv = values) {
  87                                 return CFArrayCreate (
  88                                         IntPtr.Zero,
  89                                         (IntPtr) pv,
  90                                         (IntPtr) values.Length,
  91                                         IntPtr.Zero);
  92                         }
  93                 }
  94
  95                 public static SecTrustResult TrustEvaluateSsl (MSX.X509CertificateCollection certificates, string host)
  96                 {
  97                         if (certificates == null)
  98                                 return SecTrustResult.Deny;
  99
 100                         try {
 101                                 return _TrustEvaluateSsl (certificates, host);
 102                         } catch {
 103                                 return SecTrustResult.Deny;
 104                         }
 105                 }
 106
 107                 static SecTrustResult _TrustEvaluateSsl (MSX.X509CertificateCollection certificates, string hostName)
 108                 {
 109                         int certCount = certificates.Count;
 110                         IntPtr [] cfDataPtrs = new IntPtr [certCount];
 111                         IntPtr [] secCerts = new IntPtr [certCount];
 112                         IntPtr certArray = IntPtr.Zero;
 113                         IntPtr sslsecpolicy = IntPtr.Zero;
 114                         IntPtr host = IntPtr.Zero;
 115                         IntPtr sectrust = IntPtr.Zero;
 116                         SecTrustResult result = SecTrustResult.Deny;
 117
 118                         try {
 119                                 for (int i = 0; i < certCount; i++)
 120                                         cfDataPtrs [i] = MakeCFData (certificates [i].RawData);
 121
 122                                 for (int i = 0; i < certCount; i++){
 123                                         secCerts [i] = SecCertificateCreateWithData (IntPtr.Zero, cfDataPtrs [i]);
 124                                         if (secCerts [i] == IntPtr.Zero)
 125                                                 return SecTrustResult.Deny;
 126                                 }
 127                                 certArray = FromIntPtrs (secCerts);
 128                                 host = CFStringCreateWithCharacters (IntPtr.Zero, hostName, hostName.Length);
 129                                 sslsecpolicy = SecPolicyCreateSSL (true, host);
 130
 131                                 int code = SecTrustCreateWithCertificates (certArray, sslsecpolicy, out sectrust);
 132                                 if (code == 0)
 133                                         code = SecTrustEvaluate (sectrust, out result);
 134                                 return result;
 135                         } finally {
 136                                 for (int i = 0; i < certCount; i++)
 137                                         if (cfDataPtrs [i] != IntPtr.Zero)
 138                                                 CFRelease (cfDataPtrs [i]);
 139
 140                                 if (certArray != IntPtr.Zero)
 141                                         CFRelease (certArray);
 142
 143                                 for (int i = 0; i < certCount; i++)
 144                                         if (secCerts [i] != IntPtr.Zero)
 145                                                 CFRelease (secCerts [i]);
 146
 147                                 if (sslsecpolicy != IntPtr.Zero)
 148                                         CFRelease (sslsecpolicy);
 149                                 if (host != IntPtr.Zero)
 150                                         CFRelease (host);
 151                                 if (sectrust != IntPtr.Zero)
 152                                         CFRelease (sectrust);
 153                         }
 154                 }
 155         }
 156 }
 157 #endif