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