mcs/class/corlib/System.Security.Cryptography/CryptoConfig.cs

   1 //
   2 // CryptoConfig.cs: Handles cryptographic implementations and OIDs mappings.
   3 //
   4 // Author:
   5 //      Sebastien Pouliot (sebastien@ximian.com)
   6 //      Tim Coleman (tim@timcoleman.com)
   7 //
   8 // (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
   9 // Copyright (C) Tim Coleman, 2004
  10 // Copyright (C) 2004-2007,2011 Novell, Inc (http://www.novell.com)
  11 // Copyright (C) 2011 Xamarin Inc. http://www.xamarin.com
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 #if !FULL_AOT_RUNTIME
  34
  35 using System.Collections;
  36 using System.Collections.Generic;
  37 using System.Globalization;
  38 using System.IO;
  39 using System.Reflection;
  40 using System.Runtime.CompilerServices;
  41 using System.Runtime.InteropServices;
  42 using System.Security.Permissions;
  43 using System.Text;
  44 using System.Security.Cryptography.X509Certificates;
  45
  46 using Mono.Xml;
  47
  48 namespace System.Security.Cryptography {
  49
  50 [ComVisible (true)]
  51 public partial class CryptoConfig {
  52
  53         static private object lockObject;
  54         static private Dictionary<string,Type> algorithms;
  55         static private Dictionary<string,string> unresolved_algorithms;
  56         static private Dictionary<string,string> oids;
  57
  58         private const string defaultNamespace = "System.Security.Cryptography.";
  59         static Type defaultSHA1 = typeof (SHA1CryptoServiceProvider);
  60         static Type defaultMD5 = typeof (MD5CryptoServiceProvider);
  61         static Type defaultSHA256 = typeof (SHA256Managed);
  62         static Type defaultSHA384 = typeof (SHA384Managed);
  63         static Type defaultSHA512 = typeof (SHA512Managed);
  64         static Type defaultRSA = typeof (RSACryptoServiceProvider);
  65         static Type defaultDSA = typeof (DSACryptoServiceProvider);
  66         static Type defaultDES = typeof (DESCryptoServiceProvider);
  67         static Type default3DES = typeof (TripleDESCryptoServiceProvider);
  68         static Type defaultRC2 = typeof (RC2CryptoServiceProvider);
  69         static Type defaultAES = typeof (RijndaelManaged);
  70         // LAMESPEC: undocumented names in CryptoConfig
  71         static Type defaultRNG = typeof (RNGCryptoServiceProvider);
  72         static Type defaultHMAC = typeof (HMACSHA1);
  73         static Type defaultMAC3DES = typeof (MACTripleDES);
  74         // LAMESPEC: undocumented classes (also undocumented in CryptoConfig ;-)
  75         static Type defaultDSASigDesc = typeof (DSASignatureDescription);
  76         static Type defaultRSASigDesc = typeof (RSAPKCS1SHA1SignatureDescription);
  77         static Type defaultRIPEMD160 = typeof (RIPEMD160Managed);
  78         static Type defaultHMACMD5 = typeof (HMACMD5);
  79         static Type defaultHMACRIPEMD160 = typeof (HMACRIPEMD160);
  80         static Type defaultHMACSHA256 = typeof (HMACSHA256);
  81         static Type defaultHMACSHA384 = typeof (HMACSHA384);
  82         static Type defaultHMACSHA512 = typeof (HMACSHA512);
  83
  84         // LAMESPEC: undocumented names in CryptoConfig
  85         private const string defaultC14N = defaultNamespace + "Xml.XmlDsigC14NTransform, " + Consts.AssemblySystem_Security;
  86         private const string defaultC14NWithComments = defaultNamespace + "Xml.XmlDsigC14NWithCommentsTransform, " + Consts.AssemblySystem_Security;
  87         private const string defaultBase64 = defaultNamespace + "Xml.XmlDsigBase64Transform, " + Consts.AssemblySystem_Security;
  88         private const string defaultXPath = defaultNamespace + "Xml.XmlDsigXPathTransform, " + Consts.AssemblySystem_Security;
  89         private const string defaultXslt = defaultNamespace + "Xml.XmlDsigXsltTransform, " + Consts.AssemblySystem_Security;
  90         private const string defaultEnveloped = defaultNamespace + "Xml.XmlDsigEnvelopedSignatureTransform, " + Consts.AssemblySystem_Security;
  91         private const string defaultXmlDecryption = defaultNamespace + "Xml.XmlDecryptionTransform, " + Consts.AssemblySystem_Security;
  92         private const string defaultExcC14N = defaultNamespace + "Xml.XmlDsigExcC14NTransform, " + Consts.AssemblySystem_Security;
  93         private const string defaultExcC14NWithComments = defaultNamespace + "Xml.XmlDsigExcC14NWithCommentsTransform, " + Consts.AssemblySystem_Security;
  94
  95         // LAMESPEC: only documentated in ".NET Framework Security" book
  96         private const string defaultX509Data = defaultNamespace + "Xml.KeyInfoX509Data, " + Consts.AssemblySystem_Security;
  97         private const string defaultKeyName = defaultNamespace + "Xml.KeyInfoName, " + Consts.AssemblySystem_Security;
  98         private const string defaultKeyValueDSA = defaultNamespace + "Xml.DSAKeyValue, " + Consts.AssemblySystem_Security;
  99         private const string defaultKeyValueRSA = defaultNamespace + "Xml.RSAKeyValue, " + Consts.AssemblySystem_Security;
 100         private const string defaultRetrievalMethod = defaultNamespace + "Xml.KeyInfoRetrievalMethod, " + Consts.AssemblySystem_Security;
 101
 102         private const string managedSHA1 = defaultNamespace + "SHA1Managed";
 103
 104         // Oddly OID seems only available for hash algorithms
 105         private const string oidSHA1 = "1.3.14.3.2.26";
 106         private const string oidMD5 = "1.2.840.113549.2.5";
 107         // changed in 2.0
 108         private const string oidSHA256 = "2.16.840.1.101.3.4.2.1";
 109         private const string oidSHA384 = "2.16.840.1.101.3.4.2.2";
 110         private const string oidSHA512 = "2.16.840.1.101.3.4.2.3";
 111         private const string oidRIPEMD160 = "1.3.36.3.2.1";
 112         // new in 2.0
 113 //      private const string oidRSA = "1.2.840.113549.1.1.1";
 114 //      private const string oidDSA = "1.2.840.10040.4.1";
 115         private const string oidDES = "1.3.14.3.2.7";
 116         private const string oid3DES = "1.2.840.113549.3.7";
 117         private const string oidRC2 = "1.2.840.113549.3.2";
 118         // LAMESPEC: only documentated in ".NET Framework Security" book
 119         private const string oid3DESKeyWrap = "1.2.840.113549.1.9.16.3.6";
 120
 121         private const string nameSHA1 = "System.Security.Cryptography.SHA1CryptoServiceProvider";
 122         private const string nameSHA1a = "SHA";
 123         private const string nameSHA1b = "SHA1";
 124         private const string nameSHA1c = "System.Security.Cryptography.SHA1";
 125         private const string nameSHA1d = "System.Security.Cryptography.HashAlgorithm";
 126         private const string nameMD5 = "System.Security.Cryptography.MD5CryptoServiceProvider";
 127         private const string nameMD5a = "MD5";
 128         private const string nameMD5b = "System.Security.Cryptography.MD5";
 129         private const string nameSHA256 = "System.Security.Cryptography.SHA256Managed";
 130         private const string nameSHA256a = "SHA256";
 131         private const string nameSHA256b = "SHA-256";
 132         private const string nameSHA256c = "System.Security.Cryptography.SHA256";
 133         private const string nameSHA384 = "System.Security.Cryptography.SHA384Managed";
 134         private const string nameSHA384a = "SHA384";
 135         private const string nameSHA384b = "SHA-384";
 136         private const string nameSHA384c = "System.Security.Cryptography.SHA384";
 137         private const string nameSHA512 = "System.Security.Cryptography.SHA512Managed";
 138         private const string nameSHA512a = "SHA512";
 139         private const string nameSHA512b = "SHA-512";
 140         private const string nameSHA512c = "System.Security.Cryptography.SHA512";
 141         private const string nameRSAa = "RSA";
 142         private const string nameRSAb = "System.Security.Cryptography.RSA";
 143         private const string nameRSAc = "System.Security.Cryptography.AsymmetricAlgorithm";
 144         private const string nameDSAa = "DSA";
 145         private const string nameDSAb = "System.Security.Cryptography.DSA";
 146         private const string nameDESa = "DES";
 147         private const string nameDESb = "System.Security.Cryptography.DES";
 148         private const string name3DESa = "3DES";
 149         private const string name3DESb = "TripleDES";
 150         private const string name3DESc = "Triple DES";
 151         private const string name3DESd = "System.Security.Cryptography.TripleDES";
 152         private const string nameRC2a = "RC2";
 153         private const string nameRC2b = "System.Security.Cryptography.RC2";
 154         private const string nameAESa = "Rijndael";
 155         private const string nameAESb = "System.Security.Cryptography.Rijndael";
 156         private const string nameAESc = "System.Security.Cryptography.SymmetricAlgorithm";
 157         // LAMESPEC: undocumented names in CryptoConfig
 158         private const string nameRNGa = "RandomNumberGenerator";
 159         private const string nameRNGb = "System.Security.Cryptography.RandomNumberGenerator";
 160         private const string nameKeyHasha = "System.Security.Cryptography.KeyedHashAlgorithm";
 161         private const string nameHMACSHA1a = "HMACSHA1";
 162         private const string nameHMACSHA1b = "System.Security.Cryptography.HMACSHA1";
 163         private const string nameMAC3DESa = "MACTripleDES";
 164         private const string nameMAC3DESb = "System.Security.Cryptography.MACTripleDES";
 165         // LAMESPEC: only documentated in ".NET Framework Security" book
 166         private const string name3DESKeyWrap = "TripleDESKeyWrap";
 167         private const string nameRIPEMD160 = "System.Security.Cryptography.RIPEMD160Managed";
 168         private const string nameRIPEMD160a = "RIPEMD160";
 169         private const string nameRIPEMD160b = "RIPEMD-160";
 170         private const string nameRIPEMD160c = "System.Security.Cryptography.RIPEMD160";
 171 //      private const string nameHMACa = "HMAC";
 172         private const string nameHMACb = "System.Security.Cryptography.HMAC";
 173         private const string nameHMACMD5a = "HMACMD5";
 174         private const string nameHMACMD5b = "System.Security.Cryptography.HMACMD5";
 175         private const string nameHMACRIPEMD160a = "HMACRIPEMD160";
 176         private const string nameHMACRIPEMD160b = "System.Security.Cryptography.HMACRIPEMD160";
 177         private const string nameHMACSHA256a = "HMACSHA256";
 178         private const string nameHMACSHA256b = "System.Security.Cryptography.HMACSHA256";
 179         private const string nameHMACSHA384a = "HMACSHA384";
 180         private const string nameHMACSHA384b = "System.Security.Cryptography.HMACSHA384";
 181         private const string nameHMACSHA512a = "HMACSHA512";
 182         private const string nameHMACSHA512b = "System.Security.Cryptography.HMACSHA512";
 183
 184         private const string urlXmlDsig = "http://www.w3.org/2000/09/xmldsig#";
 185         // LAMESPEC: undocumented URLs in CryptoConfig
 186         private const string urlDSASHA1 = urlXmlDsig + "dsa-sha1";                      // no space
 187         private const string urlRSASHA1 = urlXmlDsig + "rsa-sha1";                      // no space
 188         private const string urlSHA1 = urlXmlDsig + "sha1";                             // no space
 189         private const string urlC14N = "http://www.w3.org/TR/2001/REC-xml-c14n-20010315";
 190         private const string urlC14NWithComments = "http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments";
 191         private const string urlBase64 = "http://www.w3.org/2000/09/xmldsig#base64";
 192         private const string urlXPath = "http://www.w3.org/TR/1999/REC-xpath-19991116";
 193         private const string urlXslt = "http://www.w3.org/TR/1999/REC-xslt-19991116";
 194         private const string urlEnveloped = urlXmlDsig + "enveloped-signature";         // no space
 195         private const string urlXmlDecryption = "http://www.w3.org/2002/07/decrypt#XML";
 196         private const string urlExcC14NWithComments = "http://www.w3.org/2001/10/xml-exc-c14n#WithComments";
 197         private const string urlExcC14N = "http://www.w3.org/2001/10/xml-exc-c14n#";
 198         private const string urlSHA256 = "http://www.w3.org/2001/04/xmlenc#sha256";
 199         private const string urlSHA512 = "http://www.w3.org/2001/04/xmlenc#sha512";
 200         private const string urlHMACSHA256 = "http://www.w3.org/2001/04/xmldsig-more#hmac-sha256";
 201         private const string urlHMACSHA384 = "http://www.w3.org/2001/04/xmldsig-more#hmac-sha384";
 202         private const string urlHMACSHA512 = "http://www.w3.org/2001/04/xmldsig-more#hmac-sha512";
 203         private const string urlHMACRIPEMD160 = "http://www.w3.org/2001/04/xmldsig-more#hmac-ripemd160";
 204
 205         // LAMESPEC: only documentated in ".NET Framework Security" book
 206         private const string urlX509Data = urlXmlDsig + " X509Data";                    // space is required
 207         private const string urlKeyName = urlXmlDsig + " KeyName";                      // space is required
 208         private const string urlKeyValueDSA = urlXmlDsig + " KeyValue/DSAKeyValue";     // space is required
 209         private const string urlKeyValueRSA = urlXmlDsig + " KeyValue/RSAKeyValue";     // space is required
 210         private const string urlRetrievalMethod = urlXmlDsig + " RetrievalMethod";      // space is required
 211
 212         // new (2.0) X509 certificate extensions
 213         private const string oidX509SubjectKeyIdentifier = "2.5.29.14";
 214         private const string oidX509KeyUsage = "2.5.29.15";
 215         private const string oidX509BasicConstraints = "2.5.29.19";
 216         private const string oidX509EnhancedKeyUsage = "2.5.29.37";
 217
 218         private const string nameX509SubjectKeyIdentifier = defaultNamespace + "X509Certificates.X509SubjectKeyIdentifierExtension, " + Consts.AssemblySystem;
 219         private const string nameX509KeyUsage = defaultNamespace + "X509Certificates.X509KeyUsageExtension, " + Consts.AssemblySystem;
 220         private const string nameX509BasicConstraints = defaultNamespace + "X509Certificates.X509BasicConstraintsExtension, " + Consts.AssemblySystem;
 221         private const string nameX509EnhancedKeyUsage = defaultNamespace + "X509Certificates.X509EnhancedKeyUsageExtension, " + Consts.AssemblySystem;
 222
 223         // new (2.0) X509 Chain
 224         private const string nameX509Chain = "X509Chain";
 225         private const string defaultX509Chain = defaultNamespace + "X509Certificates.X509Chain, " + Consts.AssemblySystem;
 226         // AES
 227         const string system_core_assembly = ", System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089";
 228         const string nameAES_1 = "AES";
 229         const string nameAES_2 = "System.Security.Cryptography.AesCryptoServiceProvider";
 230         const string defaultAES_1 = "System.Security.Cryptography.AesCryptoServiceProvider" + system_core_assembly;
 231
 232         const string nameAESManaged_1 = "AesManaged";
 233         const string nameAESManaged_2 = "System.Security.Cryptography.AesManaged";
 234         const string defaultAESManaged = "System.Security.Cryptography.AesManaged" + system_core_assembly;
 235
 236         // ECDiffieHellman - not implemented in System.Core at the moment
 237         const string nameECDiffieHellman_1 = "ECDH";
 238         const string nameECDiffieHellman_2 = "ECDiffieHellman";
 239         const string nameECDiffieHellman_3 = "ECDiffieHellmanCng";
 240         const string nameECDiffieHellman_4 = "System.Security.Cryptography.ECDiffieHellmanCng";
 241         const string defaultECDiffieHellman = "System.Security.Cryptography.ECDiffieHellmanCng" + system_core_assembly;
 242
 243         // ECDsa - not implemented in System.Core at the moment
 244         const string nameECDsa_1 = "ECDsa";
 245         const string nameECDsa_2 = "ECDsaCng";
 246         const string nameECDsa_3 = "System.Security.Cryptography.ECDsaCng";
 247         const string defaultECDsa = "System.Security.Cryptography.ECDsaCng" + system_core_assembly;
 248
 249         // SHA1Cng
 250         const string nameSHA1Cng = "System.Security.Cryptography.SHA1Cng";
 251         const string defaultSHA1Cng = "System.Security.Cryptography.SHA1Cng" + system_core_assembly;
 252
 253         // SHA256Cng
 254         const string nameSHA256Cng = "System.Security.Cryptography.SHA256Cng";
 255         const string defaultSHA256Cng = "System.Security.Cryptography.SHA256Cng" + system_core_assembly;
 256
 257         // SHA256 provider
 258         const string nameSHA256Provider = "System.Security.Cryptography.SHA256CryptoServiceProvider";
 259         const string defaultSHA256Provider = "System.Security.Cryptography.SHA256CryptoServiceProvider" + system_core_assembly;
 260
 261         // SHA384Cng
 262         const string nameSHA384Cng = "System.Security.Cryptography.SHA384Cng";
 263         const string defaultSHA384Cng = "System.Security.Cryptography.SHA384Cng" + system_core_assembly;
 264
 265         // SHA384 provider
 266         const string nameSHA384Provider = "System.Security.Cryptography.SHA384CryptoServiceProvider";
 267         const string defaultSHA384Provider = "System.Security.Cryptography.SHA384CryptoServiceProvider" + system_core_assembly;
 268
 269         // SHA512Cng
 270         const string nameSHA512Cng = "System.Security.Cryptography.SHA512Cng";
 271         const string defaultSHA512Cng = "System.Security.Cryptography.SHA512Cng" + system_core_assembly;
 272
 273         // SHA512 provider
 274         const string nameSHA512Provider = "System.Security.Cryptography.SHA512CryptoServiceProvider";
 275         const string defaultSHA512Provider = "System.Security.Cryptography.SHA512CryptoServiceProvider" + system_core_assembly;
 276         static CryptoConfig ()
 277         {
 278                 // lock(this) is bad
 279                 // http://msdn.microsoft.com/library/en-us/dnaskdr/html/askgui06032003.asp?frame=true
 280                 lockObject = new object ();
 281         }
 282
 283         private static void Initialize ()
 284         {
 285                 Dictionary<string,Type> algorithms = new Dictionary<string, Type> (StringComparer.OrdinalIgnoreCase);
 286                 // see list @ http://msdn.microsoft.com/library/en-us/cpref/html/
 287                 // frlrfSystemSecurityCryptographyCryptoConfigClassTopic.asp
 288                 algorithms.Add (nameSHA1a, defaultSHA1);
 289                 algorithms.Add (nameSHA1b, defaultSHA1);
 290                 algorithms.Add (nameSHA1c, defaultSHA1);
 291                 algorithms.Add (nameSHA1d, defaultSHA1);
 292
 293                 algorithms.Add (nameMD5a, defaultMD5);
 294                 algorithms.Add (nameMD5b, defaultMD5);
 295
 296                 algorithms.Add (nameSHA256a, defaultSHA256);
 297                 algorithms.Add (nameSHA256b, defaultSHA256);
 298                 algorithms.Add (nameSHA256c, defaultSHA256);
 299
 300                 algorithms.Add (nameSHA384a, defaultSHA384);
 301                 algorithms.Add (nameSHA384b, defaultSHA384);
 302                 algorithms.Add (nameSHA384c, defaultSHA384);
 303
 304                 algorithms.Add (nameSHA512a, defaultSHA512);
 305                 algorithms.Add (nameSHA512b, defaultSHA512);
 306                 algorithms.Add (nameSHA512c, defaultSHA512);
 307
 308                 algorithms.Add (nameRSAa, defaultRSA);
 309                 algorithms.Add (nameRSAb, defaultRSA);
 310                 algorithms.Add (nameRSAc, defaultRSA);
 311
 312                 algorithms.Add (nameDSAa, defaultDSA);
 313                 algorithms.Add (nameDSAb, defaultDSA);
 314
 315                 algorithms.Add (nameDESa, defaultDES);
 316                 algorithms.Add (nameDESb, defaultDES);
 317
 318                 algorithms.Add (name3DESa, default3DES);
 319                 algorithms.Add (name3DESb, default3DES);
 320                 algorithms.Add (name3DESc, default3DES);
 321                 algorithms.Add (name3DESd, default3DES);
 322
 323                 algorithms.Add (nameRC2a, defaultRC2);
 324                 algorithms.Add (nameRC2b, defaultRC2);
 325
 326                 algorithms.Add (nameAESa, defaultAES);
 327                 algorithms.Add (nameAESb, defaultAES);
 328                 // LAMESPEC SymmetricAlgorithm documented as TripleDESCryptoServiceProvider
 329                 algorithms.Add (nameAESc, defaultAES);
 330
 331                 // LAMESPEC These names aren't documented but (hint) the classes also have
 332                 // static Create methods. So logically they should (and are) here.
 333                 algorithms.Add (nameRNGa, defaultRNG);
 334                 algorithms.Add (nameRNGb, defaultRNG);
 335                 algorithms.Add (nameKeyHasha, defaultHMAC);
 336                 algorithms.Add (nameHMACSHA1a, defaultHMAC);
 337                 algorithms.Add (nameHMACSHA1b, defaultHMAC);
 338                 algorithms.Add (nameMAC3DESa, defaultMAC3DES);
 339                 algorithms.Add (nameMAC3DESb, defaultMAC3DES);
 340                 algorithms.Add (nameRIPEMD160a, defaultRIPEMD160);
 341                 algorithms.Add (nameRIPEMD160b, defaultRIPEMD160);
 342                 algorithms.Add (nameRIPEMD160c, defaultRIPEMD160);
 343                 algorithms.Add (nameHMACb, defaultHMAC);
 344                 algorithms.Add (nameHMACMD5a, defaultHMACMD5);
 345                 algorithms.Add (nameHMACMD5b, defaultHMACMD5);
 346                 algorithms.Add (nameHMACRIPEMD160a, defaultHMACRIPEMD160);
 347                 algorithms.Add (nameHMACRIPEMD160b, defaultHMACRIPEMD160);
 348                 algorithms.Add (nameHMACSHA256a, defaultHMACSHA256);
 349                 algorithms.Add (nameHMACSHA256b, defaultHMACSHA256);
 350                 algorithms.Add (nameHMACSHA384a, defaultHMACSHA384);
 351                 algorithms.Add (nameHMACSHA384b, defaultHMACSHA384);
 352                 algorithms.Add (nameHMACSHA512a, defaultHMACSHA512);
 353                 algorithms.Add (nameHMACSHA512b, defaultHMACSHA512);
 354
 355                 // we do not want to load the types (and assemblies) unless we really need them
 356                 // so we keep those names as strings
 357                 Dictionary<string,string> unresolved_algorithms = new Dictionary<string, string> (StringComparer.OrdinalIgnoreCase);
 358
 359                 // LAMESPEC These URLs aren't documented but (hint) installing the WSDK
 360                 // add some of the XMLDSIG urls into machine.config (and they make a LOT
 361                 // of sense for implementing XMLDSIG in System.Security.Cryptography.Xml)
 362                 algorithms.Add (urlDSASHA1, defaultDSASigDesc);
 363                 algorithms.Add (urlRSASHA1, defaultRSASigDesc);
 364                 algorithms.Add (urlSHA1, defaultSHA1);
 365                 unresolved_algorithms.Add (urlC14N, defaultC14N);
 366                 unresolved_algorithms.Add (urlC14NWithComments, defaultC14NWithComments);
 367                 unresolved_algorithms.Add (urlBase64, defaultBase64);
 368                 unresolved_algorithms.Add (urlXPath, defaultXPath);
 369                 unresolved_algorithms.Add (urlXslt, defaultXslt);
 370                 unresolved_algorithms.Add (urlEnveloped, defaultEnveloped);
 371                 unresolved_algorithms.Add (urlExcC14N, defaultExcC14N);
 372                 unresolved_algorithms.Add (urlExcC14NWithComments, defaultExcC14NWithComments);
 373                 unresolved_algorithms.Add (urlXmlDecryption, defaultXmlDecryption);
 374                 algorithms.Add (urlSHA256, defaultSHA256);
 375                 // xmlenc does not include a definition for SHA384
 376                 algorithms.Add (urlSHA512, defaultSHA512);
 377                 algorithms.Add (urlHMACSHA256, defaultHMACSHA256);
 378                 algorithms.Add (urlHMACSHA384, defaultHMACSHA384);
 379                 algorithms.Add (urlHMACSHA512, defaultHMACSHA512);
 380                 algorithms.Add (urlHMACRIPEMD160, defaultHMACRIPEMD160);
 381                 // LAMESPEC: only documentated in ".NET Framework Security" book
 382                 unresolved_algorithms.Add (urlX509Data, defaultX509Data);
 383                 unresolved_algorithms.Add (urlKeyName, defaultKeyName);
 384                 unresolved_algorithms.Add (urlKeyValueDSA, defaultKeyValueDSA);
 385                 unresolved_algorithms.Add (urlKeyValueRSA, defaultKeyValueRSA);
 386                 unresolved_algorithms.Add (urlRetrievalMethod, defaultRetrievalMethod);
 387
 388                 // note: X.509 extensions aren't part of OID but names
 389                 unresolved_algorithms.Add (oidX509SubjectKeyIdentifier, nameX509SubjectKeyIdentifier);
 390                 unresolved_algorithms.Add (oidX509KeyUsage, nameX509KeyUsage);
 391                 unresolved_algorithms.Add (oidX509BasicConstraints, nameX509BasicConstraints);
 392                 unresolved_algorithms.Add (oidX509EnhancedKeyUsage, nameX509EnhancedKeyUsage);
 393                 // note: the default X.509Chain can also be created this way
 394                 unresolved_algorithms.Add (nameX509Chain, defaultX509Chain);
 395                 unresolved_algorithms.Add (nameAES_1, defaultAES_1);
 396                 unresolved_algorithms.Add (nameAES_2, defaultAES_1);
 397                 unresolved_algorithms.Add (nameAESManaged_1, defaultAESManaged);
 398                 unresolved_algorithms.Add (nameAESManaged_2, defaultAESManaged);
 399
 400                 unresolved_algorithms.Add (nameECDiffieHellman_1, defaultECDiffieHellman);
 401                 unresolved_algorithms.Add (nameECDiffieHellman_2, defaultECDiffieHellman);
 402                 unresolved_algorithms.Add (nameECDiffieHellman_3, defaultECDiffieHellman);
 403                 unresolved_algorithms.Add (nameECDiffieHellman_4, defaultECDiffieHellman);
 404
 405                 unresolved_algorithms.Add (nameECDsa_1, defaultECDsa);
 406                 unresolved_algorithms.Add (nameECDsa_2, defaultECDsa);
 407                 unresolved_algorithms.Add (nameECDsa_3, defaultECDsa);
 408
 409                 unresolved_algorithms.Add (nameSHA1Cng, defaultSHA1Cng);
 410                 unresolved_algorithms.Add (nameSHA256Cng, defaultSHA256Cng);
 411                 unresolved_algorithms.Add (nameSHA256Provider, defaultSHA256Provider);
 412                 unresolved_algorithms.Add (nameSHA384Cng, defaultSHA384Cng);
 413                 unresolved_algorithms.Add (nameSHA384Provider, defaultSHA384Provider);
 414                 unresolved_algorithms.Add (nameSHA512Cng, defaultSHA512Cng);
 415                 unresolved_algorithms.Add (nameSHA512Provider, defaultSHA512Provider);
 416                 Dictionary<string,string> oid = new Dictionary<string, string> (StringComparer.OrdinalIgnoreCase);
 417
 418                 // comments here are to match with MS implementation (but not with doc)
 419                 // LAMESPEC: only HashAlgorithm seems to have their OID included
 420                 oid.Add (nameSHA1, oidSHA1);
 421                 oid.Add (managedSHA1, oidSHA1);
 422                 oid.Add (nameSHA1b, oidSHA1);
 423                 oid.Add (nameSHA1c, oidSHA1);
 424
 425                 oid.Add (nameMD5, oidMD5);
 426                 oid.Add (nameMD5a, oidMD5);
 427                 oid.Add (nameMD5b, oidMD5);
 428
 429                 oid.Add (nameSHA256, oidSHA256);
 430                 oid.Add (nameSHA256a, oidSHA256);
 431                 oid.Add (nameSHA256c, oidSHA256);
 432
 433                 oid.Add (nameSHA384, oidSHA384);
 434                 oid.Add (nameSHA384a, oidSHA384);
 435                 oid.Add (nameSHA384c, oidSHA384);
 436
 437                 oid.Add (nameSHA512, oidSHA512);
 438                 oid.Add (nameSHA512a, oidSHA512);
 439                 oid.Add (nameSHA512c, oidSHA512);
 440
 441                 oid.Add (nameRIPEMD160, oidRIPEMD160);
 442                 oid.Add (nameRIPEMD160a, oidRIPEMD160);
 443                 oid.Add (nameRIPEMD160c, oidRIPEMD160);
 444
 445                 // surprise! documented in ".NET Framework Security" book
 446                 oid.Add (name3DESKeyWrap, oid3DESKeyWrap);
 447
 448                 oid.Add (nameDESa, oidDES);
 449                 oid.Add (name3DESb, oid3DES);
 450                 oid.Add (nameRC2a, oidRC2);
 451
 452                 // Add/modify the config as specified by machine.config
 453                 string config = Environment.GetMachineConfigPath ();
 454                 LoadConfig (config, algorithms, oid);
 455
 456                 // update
 457                 CryptoConfig.algorithms = algorithms;
 458                 CryptoConfig.unresolved_algorithms = unresolved_algorithms;
 459                 CryptoConfig.oids = oid;
 460         }
 461
 462         [FileIOPermission (SecurityAction.Assert, Unrestricted = true)]
 463         private static void LoadConfig (string filename, IDictionary<string,Type> algorithms, IDictionary<string,string> oid)
 464         {
 465                 if (!File.Exists (filename))
 466                         return;
 467
 468                 try {
 469                         using (TextReader reader = new StreamReader (filename)) {
 470                                 CryptoHandler handler = new CryptoHandler (algorithms, oid);
 471                                 SmallXmlParser parser = new SmallXmlParser ();
 472                                 parser.Parse (reader, handler);
 473                         }
 474                 }
 475                 catch {
 476                 }
 477         }
 478
 479         public static object CreateFromName (string name)
 480         {
 481                 return CreateFromName (name, null);
 482         }
 483
 484         [PermissionSet (SecurityAction.LinkDemand, Unrestricted = true)]
 485         public static object CreateFromName (string name, params object[] args)
 486         {
 487                 if (name == null)
 488                         throw new ArgumentNullException ("name");
 489
 490                 lock (lockObject) {
 491                         if (algorithms == null) {
 492                                 Initialize ();
 493                         }
 494                 }
 495
 496                 try {
 497                         Type algoClass = null;
 498                         if (!algorithms.TryGetValue (name, out algoClass)) {
 499                                 string algo = null;
 500                                 if (!unresolved_algorithms.TryGetValue (name, out algo))
 501                                                 algo = name;
 502                                 algoClass = Type.GetType (algo);
 503                         }
 504                         if (algoClass == null)
 505                                 return null;
 506                         // call the constructor for the type
 507                         return Activator.CreateInstance (algoClass, args);
 508                 }
 509                 catch {
 510                         // method doesn't throw any exception
 511                         return null;
 512                 }
 513         }
 514
 515         internal static string MapNameToOID (string name, OidGroup oidGroup)
 516         {
 517                 return MapNameToOID (name);
 518         }
 519
 520         public static string MapNameToOID (string name)
 521         {
 522                 if (name == null)
 523                         throw new ArgumentNullException ("name");
 524
 525                 lock (lockObject) {
 526                         if (oids == null) {
 527                                 Initialize ();
 528                         }
 529                 }
 530
 531                 string result = null;
 532                 oids.TryGetValue (name, out result);
 533                 return result;
 534         }
 535
 536         public static void AddAlgorithm (Type algorithm, params string[] names)
 537         {
 538                 if (algorithm == null)
 539                                 throw new ArgumentNullException ("algorithm");
 540                 if (names  == null)
 541                                 throw new ArgumentNullException ("names");
 542
 543                 foreach (string name in names) {
 544                                 if (String.IsNullOrWhiteSpace (name))
 545                                         throw new ArithmeticException ("names");
 546                                 algorithms [name] = algorithm;
 547                 }
 548         }
 549
 550         public static void AddOID (string oid, params string[] names)
 551         {
 552                 if (oid == null)
 553                                 throw new ArgumentNullException ("oid");
 554                 if (names  == null)
 555                                 throw new ArgumentNullException ("names");
 556
 557                 foreach (string name in names) {
 558                                 if (String.IsNullOrWhiteSpace (name))
 559                                         throw new ArithmeticException ("names");
 560                                 oids [oid] = name;
 561                 }
 562         }
 563
 564         class CryptoHandler: SmallXmlParser.IContentHandler {
 565
 566                 IDictionary<string,Type> algorithms;
 567                 IDictionary<string,string> oid;
 568                 Dictionary<string,string> names;
 569                 Dictionary<string,string> classnames;
 570                 int level;
 571
 572                 public CryptoHandler (IDictionary<string,Type> algorithms, IDictionary<string,string> oid)
 573                 {
 574                         this.algorithms = algorithms;
 575                         this.oid = oid;
 576                         // temporary tables to reconstruct algorithms
 577                         names = new Dictionary<string,string> ();
 578                         classnames = new Dictionary<string,string> ();
 579                 }
 580
 581                 public void OnStartParsing (SmallXmlParser parser)
 582                 {
 583                         // don't care
 584                 }
 585
 586                 public void OnEndParsing (SmallXmlParser parser)
 587                 {
 588                         foreach (var kpv in names) {
 589                                 try {
 590                                         algorithms [kpv.Key] = Type.GetType (classnames [kpv.Value]);
 591                                 }
 592                                 catch {
 593                                 }
 594                         }
 595                         // matching is done, data no more required
 596                         names.Clear ();
 597                         classnames.Clear ();
 598                 }
 599
 600                 private string Get (SmallXmlParser.IAttrList attrs, string name)
 601                 {
 602                         for (int i = 0; i < attrs.Names.Length; i++) {
 603                                 if (attrs.Names[i] == name)
 604                                         return attrs.Values[i];
 605                         }
 606                         return String.Empty;
 607                 }
 608
 609                 public void OnStartElement (string name, SmallXmlParser.IAttrList attrs)
 610                 {
 611                         switch (level) {
 612                         case 0:
 613                                 if (name == "configuration")
 614                                         level++;
 615                                 break;
 616                         case 1:
 617                                 if (name == "mscorlib")
 618                                         level++;
 619                                 break;
 620                         case 2:
 621                                 if (name == "cryptographySettings")
 622                                         level++;
 623                                 break;
 624                         case 3:
 625                                 if (name == "oidMap")
 626                                         level++;
 627                                 else if (name == "cryptoNameMapping")
 628                                         level++;
 629                                 break;
 630                         case 4:
 631                                 if (name == "oidEntry") {
 632                                         oid [Get (attrs, "name")] = Get (attrs, "OID");
 633                                 } else if (name == "nameEntry") {
 634                                         names [Get (attrs, "name")] = Get (attrs, "class");
 635                                 } else if (name == "cryptoClasses") {
 636                                         level++;
 637                                 }
 638                                 break;
 639                         case 5:
 640                                 if (name == "cryptoClass")
 641                                         classnames [attrs.Names[0]] = attrs.Values[0];
 642                                 break;
 643                         }
 644                 }
 645
 646                 public void OnEndElement (string name)
 647                 {
 648                         // parser will make sure the XML structure is respected
 649                         switch (level) {
 650                         case 1:
 651                                 if (name == "configuration")
 652                                         level--;
 653                                 break;
 654                         case 2:
 655                                 if (name == "mscorlib")
 656                                         level--;
 657                                 break;
 658                         case 3:
 659                                 if (name == "cryptographySettings")
 660                                         level--;
 661                                 break;
 662                         case 4:
 663                                 if ((name == "oidMap") || (name == "cryptoNameMapping"))
 664                                         level--;
 665                                 break;
 666                         case 5:
 667                                 if (name == "cryptoClasses")
 668                                         level--;
 669                                 break;
 670                         }
 671                 }
 672
 673                 public void OnProcessingInstruction (string name, string text)
 674                 {
 675                         // don't care
 676                 }
 677
 678                 public void OnChars (string text)
 679                 {
 680                         // don't care
 681                 }
 682
 683                 public void OnIgnorableWhitespace (string text)
 684                 {
 685                         // don't care
 686                 }
 687         }
 688 }
 689 }
 690
 691 #endif
 692