mcs/mcs/assembly.cs

   1 //
   2 // assembly.cs: Assembly declaration and specifications
   3 //
   4 // Authors:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //   Marek Safar (marek.safar@gmail.com)
   7 //
   8 // Copyright 2001, 2002, 2003 Ximian, Inc.
   9 // Copyright 2004-2011 Novell, Inc.
  10 // Copyright 2011 Xamarin Inc
  11 //
  12
  13
  14 using System;
  15 using System.IO;
  16 using System.Collections.Generic;
  17 using System.Globalization;
  18 using System.Security;
  19 using System.Security.Cryptography;
  20 using System.Security.Permissions;
  21 using Mono.Security.Cryptography;
  22 using Mono.CompilerServices.SymbolWriter;
  23
  24 #if STATIC
  25 using IKVM.Reflection;
  26 using IKVM.Reflection.Emit;
  27 using SecurityType = System.Collections.Generic.List<IKVM.Reflection.Emit.CustomAttributeBuilder>;
  28 #else
  29 using SecurityType = System.Collections.Generic.Dictionary<System.Security.Permissions.SecurityAction, System.Security.PermissionSet>;
  30 using System.Reflection;
  31 using System.Reflection.Emit;
  32 #endif
  33
  34 namespace Mono.CSharp
  35 {
  36         public interface IAssemblyDefinition
  37         {
  38                 string FullName { get; }
  39                 bool HasExtensionMethod { get; }
  40                 bool IsCLSCompliant { get; }
  41                 bool IsMissing { get; }
  42                 string Name { get; }
  43
  44                 byte[] GetPublicKeyToken ();
  45                 bool IsFriendAssemblyTo (IAssemblyDefinition assembly);
  46         }
  47
  48         public abstract class AssemblyDefinition : IAssemblyDefinition
  49         {
  50                 // TODO: make it private and move all builder based methods here
  51                 public AssemblyBuilder Builder;
  52                 protected AssemblyBuilderExtension builder_extra;
  53                 MonoSymbolWriter symbol_writer;
  54
  55                 bool is_cls_compliant;
  56                 bool wrap_non_exception_throws;
  57                 bool wrap_non_exception_throws_custom;
  58
  59                 protected ModuleContainer module;
  60                 readonly string name;
  61                 protected readonly string file_name;
  62
  63                 byte[] public_key, public_key_token;
  64                 bool delay_sign;
  65
  66                 // Holds private/public key pair when private key
  67                 // was available
  68                 StrongNameKeyPair private_key;
  69
  70                 Attribute cls_attribute;
  71                 Method entry_point;
  72
  73                 protected List<ImportedModuleDefinition> added_modules;
  74                 SecurityType declarative_security;
  75                 Dictionary<ITypeDefinition, Attribute> emitted_forwarders;
  76                 AssemblyAttributesPlaceholder module_target_attrs;
  77
  78                 protected AssemblyDefinition (ModuleContainer module, string name)
  79                 {
  80                         this.module = module;
  81                         this.name = Path.GetFileNameWithoutExtension (name);
  82
  83                         wrap_non_exception_throws = true;
  84
  85                         delay_sign = Compiler.Settings.StrongNameDelaySign;
  86
  87                         //
  88                         // Load strong name key early enough for assembly importer to be able to
  89                         // use the keys for InternalsVisibleTo
  90                         // This should go somewhere close to ReferencesLoading but don't have the place yet
  91                         //
  92                         if (Compiler.Settings.HasKeyFileOrContainer) {
  93                                 LoadPublicKey (Compiler.Settings.StrongNameKeyFile, Compiler.Settings.StrongNameKeyContainer);
  94                         }
  95                 }
  96
  97                 protected AssemblyDefinition (ModuleContainer module, string name, string fileName)
  98                         : this (module, name)
  99                 {
 100                         this.file_name = fileName;
 101                 }
 102
 103                 #region Properties
 104
 105                 public Attribute CLSCompliantAttribute {
 106                         get {
 107                                 return cls_attribute;
 108                         }
 109                 }
 110
 111                 public CompilerContext Compiler {
 112                         get {
 113                                 return module.Compiler;
 114                         }
 115                 }
 116
 117                 //
 118                 // Assembly entry point, aka Main method
 119                 //
 120                 public Method EntryPoint {
 121                         get {
 122                                 return entry_point;
 123                         }
 124                         set {
 125                                 entry_point = value;
 126                         }
 127                 }
 128
 129                 public string FullName {
 130                         get {
 131                                 return Builder.FullName;
 132                         }
 133                 }
 134
 135                 public bool HasExtensionMethod {
 136                         get {
 137                                 return module.HasExtensionMethod;
 138                         }
 139                 }
 140
 141                 public bool HasCLSCompliantAttribute {
 142                         get {
 143                                 return cls_attribute != null;
 144                         }
 145                 }
 146
 147                 // TODO: This should not exist here but will require more changes
 148                 public MetadataImporter Importer {
 149                     get; set;
 150                 }
 151
 152                 public bool IsCLSCompliant {
 153                         get {
 154                                 return is_cls_compliant;
 155                         }
 156                 }
 157
 158                 bool IAssemblyDefinition.IsMissing {
 159                         get {
 160                                 return false;
 161                         }
 162                 }
 163
 164                 public string Name {
 165                         get {
 166                                 return name;
 167                         }
 168                 }
 169
 170                 public bool WrapNonExceptionThrows {
 171                         get {
 172                                 return wrap_non_exception_throws;
 173                         }
 174                 }
 175
 176                 protected Report Report {
 177                         get {
 178                                 return Compiler.Report;
 179                         }
 180                 }
 181
 182                 #endregion
 183
 184                 public void AddModule (ImportedModuleDefinition module)
 185                 {
 186                         if (added_modules == null) {
 187                                 added_modules = new List<ImportedModuleDefinition> ();
 188                                 added_modules.Add (module);
 189                         }
 190                 }
 191
 192                 public void ApplyAttributeBuilder (Attribute a, MethodSpec ctor, byte[] cdata, PredefinedAttributes pa)
 193                 {
 194                         if (a.IsValidSecurityAttribute ()) {
 195                                 a.ExtractSecurityPermissionSet (ctor, ref declarative_security);
 196                                 return;
 197                         }
 198
 199                         if (a.Type == pa.AssemblyCulture) {
 200                                 string value = a.GetString ();
 201                                 if (value == null || value.Length == 0)
 202                                         return;
 203
 204                                 if (Compiler.Settings.Target == Target.Exe) {
 205                                         a.Error_AttributeEmitError ("The executables cannot be satelite assemblies, remove the attribute or keep it empty");
 206                                         return;
 207                                 }
 208
 209                                 if (value == "neutral")
 210                                         value = "";
 211
 212                                 if (Compiler.Settings.Target == Target.Module) {
 213                                         SetCustomAttribute (ctor, cdata);
 214                                 } else {
 215                                         builder_extra.SetCulture (value, a.Location);
 216                                 }
 217
 218                                 return;
 219                         }
 220
 221                         if (a.Type == pa.AssemblyVersion) {
 222                                 string value = a.GetString ();
 223                                 if (value == null || value.Length == 0)
 224                                         return;
 225
 226                                 var vinfo = IsValidAssemblyVersion (value, true);
 227                                 if (vinfo == null) {
 228                                         a.Error_AttributeEmitError (string.Format ("Specified version `{0}' is not valid", value));
 229                                         return;
 230                                 }
 231
 232                                 if (Compiler.Settings.Target == Target.Module) {
 233                                         SetCustomAttribute (ctor, cdata);
 234                                 } else {
 235                                         builder_extra.SetVersion (vinfo, a.Location);
 236                                 }
 237
 238                                 return;
 239                         }
 240
 241                         if (a.Type == pa.AssemblyAlgorithmId) {
 242                                 const int pos = 2; // skip CA header
 243                                 uint alg = (uint) cdata [pos];
 244                                 alg |= ((uint) cdata [pos + 1]) << 8;
 245                                 alg |= ((uint) cdata [pos + 2]) << 16;
 246                                 alg |= ((uint) cdata [pos + 3]) << 24;
 247
 248                                 if (Compiler.Settings.Target == Target.Module) {
 249                                         SetCustomAttribute (ctor, cdata);
 250                                 } else {
 251                                         builder_extra.SetAlgorithmId (alg, a.Location);
 252                                 }
 253
 254                                 return;
 255                         }
 256
 257                         if (a.Type == pa.AssemblyFlags) {
 258                                 const int pos = 2; // skip CA header
 259                                 uint flags = (uint) cdata[pos];
 260                                 flags |= ((uint) cdata [pos + 1]) << 8;
 261                                 flags |= ((uint) cdata [pos + 2]) << 16;
 262                                 flags |= ((uint) cdata [pos + 3]) << 24;
 263
 264                                 // Ignore set PublicKey flag if assembly is not strongnamed
 265                                 if ((flags & (uint) AssemblyNameFlags.PublicKey) != 0 && public_key == null)
 266                                         flags &= ~(uint) AssemblyNameFlags.PublicKey;
 267
 268                                 if (Compiler.Settings.Target == Target.Module) {
 269                                         SetCustomAttribute (ctor, cdata);
 270                                 } else {
 271                                         builder_extra.SetFlags (flags, a.Location);
 272                                 }
 273
 274                                 return;
 275                         }
 276
 277                         if (a.Type == pa.TypeForwarder) {
 278                                 TypeSpec t = a.GetArgumentType ();
 279                                 if (t == null || TypeManager.HasElementType (t)) {
 280                                         Report.Error (735, a.Location, "Invalid type specified as an argument for TypeForwardedTo attribute");
 281                                         return;
 282                                 }
 283
 284                                 if (emitted_forwarders == null) {
 285                                         emitted_forwarders = new Dictionary<ITypeDefinition, Attribute> ();
 286                                 } else if (emitted_forwarders.ContainsKey (t.MemberDefinition)) {
 287                                         Report.SymbolRelatedToPreviousError (emitted_forwarders[t.MemberDefinition].Location, null);
 288                                         Report.Error (739, a.Location, "A duplicate type forward of type `{0}'",
 289                                                 TypeManager.CSharpName (t));
 290                                         return;
 291                                 }
 292
 293                                 emitted_forwarders.Add (t.MemberDefinition, a);
 294
 295                                 if (t.MemberDefinition.DeclaringAssembly == this) {
 296                                         Report.SymbolRelatedToPreviousError (t);
 297                                         Report.Error (729, a.Location, "Cannot forward type `{0}' because it is defined in this assembly",
 298                                                 TypeManager.CSharpName (t));
 299                                         return;
 300                                 }
 301
 302                                 if (t.IsNested) {
 303                                         Report.Error (730, a.Location, "Cannot forward type `{0}' because it is a nested type",
 304                                                 TypeManager.CSharpName (t));
 305                                         return;
 306                                 }
 307
 308                                 builder_extra.AddTypeForwarder (t.GetDefinition (), a.Location);
 309                                 return;
 310                         }
 311
 312                         if (a.Type == pa.Extension) {
 313                                 a.Error_MisusedExtensionAttribute ();
 314                                 return;
 315                         }
 316
 317                         if (a.Type == pa.InternalsVisibleTo) {
 318                                 string assembly_name = a.GetString ();
 319                                 if (assembly_name.Length == 0)
 320                                         return;
 321 #if STATIC
 322                                 ParsedAssemblyName aname;
 323                                 ParseAssemblyResult r = Fusion.ParseAssemblyName (assembly_name, out aname);
 324                                 if (r != ParseAssemblyResult.OK) {
 325                                         Report.Warning (1700, 3, a.Location, "Assembly reference `{0}' is invalid and cannot be resolved",
 326                                                 assembly_name);
 327                                         return;
 328                                 }
 329
 330                                 if (aname.Version != null || aname.Culture != null || aname.ProcessorArchitecture != ProcessorArchitecture.None) {
 331                                         Report.Error (1725, a.Location,
 332                                                 "Friend assembly reference `{0}' is invalid. InternalsVisibleTo declarations cannot have a version, culture or processor architecture specified",
 333                                                 assembly_name);
 334
 335                                         return;
 336                                 }
 337
 338                                 if (public_key != null && !aname.HasPublicKey) {
 339                                         Report.Error (1726, a.Location,
 340                                                 "Friend assembly reference `{0}' is invalid. Strong named assemblies must specify a public key in their InternalsVisibleTo declarations",
 341                                                 assembly_name);
 342                                         return;
 343                                 }
 344 #endif
 345                         } else if (a.Type == pa.RuntimeCompatibility) {
 346                                 wrap_non_exception_throws_custom = true;
 347                         } else if (a.Type == pa.AssemblyFileVersion) {
 348                                 string value = a.GetString ();
 349                                 if (string.IsNullOrEmpty (value) || IsValidAssemblyVersion (value, false) == null) {
 350                                         Report.Warning (1607, 1, a.Location, "The version number `{0}' specified for `{1}' is invalid",
 351                                                 value, a.Name);
 352                                         return;
 353                                 }
 354                         }
 355
 356
 357                         SetCustomAttribute (ctor, cdata);
 358                 }
 359
 360                 //
 361                 // When using assembly public key attributes InternalsVisibleTo key
 362                 // was not checked, we have to do it later when we actually know what
 363                 // our public key token is
 364                 //
 365                 void CheckReferencesPublicToken ()
 366                 {
 367                         // TODO: It should check only references assemblies but there is
 368                         // no working SRE API
 369                         foreach (var entry in Importer.Assemblies) {
 370                                 var a = entry as ImportedAssemblyDefinition;
 371                                 if (a == null)
 372                                         continue;
 373
 374                                 if (public_key != null && !a.HasStrongName) {
 375                                         Report.Error (1577, "Referenced assembly `{0}' does not have a strong name",
 376                                                 a.FullName);
 377                                 }
 378
 379                                 var ci = a.Assembly.GetName ().CultureInfo;
 380                                 if (!ci.Equals (System.Globalization.CultureInfo.InvariantCulture)) {
 381                                         Report.Warning (1607, 1, "Referenced assembly `{0}' has different culture setting of `{1}'",
 382                                                 a.Name, ci.Name);
 383                                 }
 384
 385                                 if (!a.IsFriendAssemblyTo (this))
 386                                         continue;
 387
 388                                 var attr = a.GetAssemblyVisibleToName (this);
 389                                 var atoken = attr.GetPublicKeyToken ();
 390
 391                                 if (ArrayComparer.IsEqual (GetPublicKeyToken (), atoken))
 392                                         continue;
 393
 394                                 Report.SymbolRelatedToPreviousError (a.Location);
 395                                 Report.Error (281,
 396                                         "Friend access was granted to `{0}', but the output assembly is named `{1}'. Try adding a reference to `{0}' or change the output assembly name to match it",
 397                                         attr.FullName, FullName);
 398                         }
 399                 }
 400
 401                 protected AssemblyName CreateAssemblyName ()
 402                 {
 403                         var an = new AssemblyName (name);
 404
 405                         if (public_key != null && Compiler.Settings.Target != Target.Module) {
 406                                 if (delay_sign) {
 407                                         an.SetPublicKey (public_key);
 408                                 } else {
 409                                         if (public_key.Length == 16) {
 410                                                 Report.Error (1606, "Could not sign the assembly. ECMA key can only be used to delay-sign assemblies");
 411                                         } else if (private_key == null) {
 412                                                 Error_AssemblySigning ("The specified key file does not have a private key");
 413                                         } else {
 414                                                 an.KeyPair = private_key;
 415                                         }
 416                                 }
 417                         }
 418
 419                         return an;
 420                 }
 421
 422                 public virtual ModuleBuilder CreateModuleBuilder ()
 423                 {
 424                         if (file_name == null)
 425                                 throw new NotSupportedException ("transient module in static assembly");
 426
 427                         var module_name = Path.GetFileName (file_name);
 428
 429                         // Always initialize module without symbolInfo. We could be framework dependent
 430                         // but returned ISymbolWriter does not have all what we need therefore some
 431                         // adaptor will be needed for now we alwayas emit MDB format when generating
 432                         // debug info
 433                         return Builder.DefineDynamicModule (module_name, module_name, false);
 434                 }
 435
 436                 public virtual void Emit ()
 437                 {
 438                         if (Compiler.Settings.Target == Target.Module) {
 439                                 module_target_attrs = new AssemblyAttributesPlaceholder (module, name);
 440                                 module_target_attrs.CreateContainer ();
 441                                 module_target_attrs.DefineContainer ();
 442                                 module_target_attrs.Define ();
 443                                 module.AddCompilerGeneratedClass (module_target_attrs);
 444                         } else if (added_modules != null) {
 445                                 ReadModulesAssemblyAttributes ();
 446                         }
 447
 448                         if (Compiler.Settings.GenerateDebugInfo) {
 449                                 symbol_writer = new MonoSymbolWriter (file_name);
 450
 451                                 // Register all source files with symbol writer
 452                                 foreach (var source in Compiler.SourceFiles) {
 453                                         source.DefineSymbolInfo (symbol_writer);
 454                                 }
 455
 456                                 // TODO: global variables
 457                                 SymbolWriter.symwriter = symbol_writer;
 458                         }
 459
 460                         module.EmitContainer ();
 461
 462                         if (module.HasExtensionMethod) {
 463                                 var pa = module.PredefinedAttributes.Extension;
 464                                 if (pa.IsDefined) {
 465                                         SetCustomAttribute (pa.Constructor, AttributeEncoder.Empty);
 466                                 }
 467                         }
 468
 469                         if (!wrap_non_exception_throws_custom) {
 470                                 PredefinedAttribute pa = module.PredefinedAttributes.RuntimeCompatibility;
 471                                 if (pa.IsDefined && pa.ResolveBuilder ()) {
 472                                         var prop = module.PredefinedMembers.RuntimeCompatibilityWrapNonExceptionThrows.Get ();
 473                                         if (prop != null) {
 474                                                 AttributeEncoder encoder = new AttributeEncoder ();
 475                                                 encoder.EncodeNamedPropertyArgument (prop, new BoolLiteral (Compiler.BuiltinTypes, true, Location.Null));
 476                                                 SetCustomAttribute (pa.Constructor, encoder.ToArray ());
 477                                         }
 478                                 }
 479                         }
 480
 481                         if (declarative_security != null) {
 482 #if STATIC
 483                                 foreach (var entry in declarative_security) {
 484                                         Builder.__AddDeclarativeSecurity (entry);
 485                                 }
 486 #else
 487                                 var args = new PermissionSet[3];
 488                                 declarative_security.TryGetValue (SecurityAction.RequestMinimum, out args[0]);
 489                                 declarative_security.TryGetValue (SecurityAction.RequestOptional, out args[1]);
 490                                 declarative_security.TryGetValue (SecurityAction.RequestRefuse, out args[2]);
 491                                 builder_extra.AddPermissionRequests (args);
 492 #endif
 493                         }
 494
 495                         CheckReferencesPublicToken ();
 496
 497                         SetEntryPoint ();
 498                 }
 499
 500                 public byte[] GetPublicKeyToken ()
 501                 {
 502                         if (public_key == null || public_key_token != null)
 503                                 return public_key_token;
 504
 505                         HashAlgorithm ha = SHA1.Create ();
 506                         byte[] hash = ha.ComputeHash (public_key);
 507                         // we need the last 8 bytes in reverse order
 508                         public_key_token = new byte[8];
 509                         Buffer.BlockCopy (hash, hash.Length - 8, public_key_token, 0, 8);
 510                         Array.Reverse (public_key_token, 0, 8);
 511                         return public_key_token;
 512                 }
 513
 514                 //
 515                 // Either keyFile or keyContainer has to be non-null
 516                 //
 517                 void LoadPublicKey (string keyFile, string keyContainer)
 518                 {
 519                         if (keyContainer != null) {
 520                                 try {
 521                                         private_key = new StrongNameKeyPair (keyContainer);
 522                                         public_key = private_key.PublicKey;
 523                                 } catch {
 524                                         Error_AssemblySigning ("The specified key container `" + keyContainer + "' does not exist");
 525                                 }
 526
 527                                 return;
 528                         }
 529
 530                         bool key_file_exists = File.Exists (keyFile);
 531
 532                         //
 533                         // For attribute based KeyFile do additional lookup
 534                         // in output assembly path
 535                         //
 536                         if (!key_file_exists && Compiler.Settings.StrongNameKeyFile == null) {
 537                                 //
 538                                 // The key file can be relative to output assembly
 539                                 //
 540                                 string test_path = Path.Combine (Path.GetDirectoryName (file_name), keyFile);
 541                                 key_file_exists = File.Exists (test_path);
 542                                 if (key_file_exists)
 543                                         keyFile = test_path;
 544                         }
 545
 546                         if (!key_file_exists) {
 547                                 Error_AssemblySigning ("The specified key file `" + keyFile + "' does not exist");
 548                                 return;
 549                         }
 550
 551                         using (FileStream fs = new FileStream (keyFile, FileMode.Open, FileAccess.Read)) {
 552                                 byte[] snkeypair = new byte[fs.Length];
 553                                 fs.Read (snkeypair, 0, snkeypair.Length);
 554
 555                                 // check for ECMA key
 556                                 if (snkeypair.Length == 16) {
 557                                         public_key = snkeypair;
 558                                         return;
 559                                 }
 560
 561                                 try {
 562                                         // take it, with or without, a private key
 563                                         RSA rsa = CryptoConvert.FromCapiKeyBlob (snkeypair);
 564                                         // and make sure we only feed the public part to Sys.Ref
 565                                         byte[] publickey = CryptoConvert.ToCapiPublicKeyBlob (rsa);
 566
 567                                         // AssemblyName.SetPublicKey requires an additional header
 568                                         byte[] publicKeyHeader = new byte[8] { 0x00, 0x24, 0x00, 0x00, 0x04, 0x80, 0x00, 0x00 };
 569
 570                                         // Encode public key
 571                                         public_key = new byte[12 + publickey.Length];
 572                                         Buffer.BlockCopy (publicKeyHeader, 0, public_key, 0, publicKeyHeader.Length);
 573
 574                                         // Length of Public Key (in bytes)
 575                                         int lastPart = public_key.Length - 12;
 576                                         public_key[8] = (byte) (lastPart & 0xFF);
 577                                         public_key[9] = (byte) ((lastPart >> 8) & 0xFF);
 578                                         public_key[10] = (byte) ((lastPart >> 16) & 0xFF);
 579                                         public_key[11] = (byte) ((lastPart >> 24) & 0xFF);
 580
 581                                         Buffer.BlockCopy (publickey, 0, public_key, 12, publickey.Length);
 582                                 } catch {
 583                                         Error_AssemblySigning ("The specified key file `" + keyFile + "' has incorrect format");
 584                                         return;
 585                                 }
 586
 587                                 if (delay_sign)
 588                                         return;
 589
 590                                 try {
 591                                         // TODO: Is there better way to test for a private key presence ?
 592                                         CryptoConvert.FromCapiPrivateKeyBlob (snkeypair);
 593                                         private_key = new StrongNameKeyPair (snkeypair);
 594                                 } catch { }
 595                         }
 596                 }
 597
 598                 void ReadModulesAssemblyAttributes ()
 599                 {
 600                         foreach (var m in added_modules) {
 601                                 var cattrs = m.ReadAssemblyAttributes ();
 602                                 if (cattrs == null)
 603                                         continue;
 604
 605                                 module.OptAttributes.AddAttributes (cattrs);
 606                         }
 607                 }
 608
 609                 public void Resolve ()
 610                 {
 611                         if (Compiler.Settings.Unsafe && module.PredefinedTypes.SecurityAction.Define ()) {
 612                                 //
 613                                 // Emits [assembly: SecurityPermissionAttribute (SecurityAction.RequestMinimum, SkipVerification = true)]
 614                                 // when -unsafe option was specified
 615                                 //
 616                                 Location loc = Location.Null;
 617
 618                                 MemberAccess system_security_permissions = new MemberAccess (new MemberAccess (
 619                                         new QualifiedAliasMember (QualifiedAliasMember.GlobalAlias, "System", loc), "Security", loc), "Permissions", loc);
 620
 621                                 var req_min = module.PredefinedMembers.SecurityActionRequestMinimum.Resolve (loc);
 622
 623                                 Arguments pos = new Arguments (1);
 624                                 pos.Add (new Argument (req_min.GetConstant (null)));
 625
 626                                 Arguments named = new Arguments (1);
 627                                 named.Add (new NamedArgument ("SkipVerification", loc, new BoolLiteral (Compiler.BuiltinTypes, true, loc)));
 628
 629                                 Attribute g = new Attribute ("assembly",
 630                                         new MemberAccess (system_security_permissions, "SecurityPermissionAttribute"),
 631                                         new Arguments[] { pos, named }, loc, false);
 632                                 g.AttachTo (module, module);
 633                                 var ctor = g.Resolve ();
 634                                 if (ctor != null) {
 635                                         g.ExtractSecurityPermissionSet (ctor, ref declarative_security);
 636                                 }
 637                         }
 638
 639                         if (module.OptAttributes == null)
 640                                 return;
 641
 642                         // Ensure that we only have GlobalAttributes, since the Search isn't safe with other types.
 643                         if (!module.OptAttributes.CheckTargets())
 644                                 return;
 645
 646                         cls_attribute = module.ResolveAssemblyAttribute (module.PredefinedAttributes.CLSCompliant);
 647
 648                         if (cls_attribute != null) {
 649                                 is_cls_compliant = cls_attribute.GetClsCompliantAttributeValue ();
 650                         }
 651
 652                         if (added_modules != null && Compiler.Settings.VerifyClsCompliance && is_cls_compliant) {
 653                                 foreach (var m in added_modules) {
 654                                         if (!m.IsCLSCompliant) {
 655                                                 Report.Error (3013,
 656                                                         "Added modules must be marked with the CLSCompliant attribute to match the assembly",
 657                                                         m.Name);
 658                                         }
 659                                 }
 660                         }
 661
 662                         Attribute a = module.ResolveAssemblyAttribute (module.PredefinedAttributes.RuntimeCompatibility);
 663                         if (a != null) {
 664                                 var val = a.GetNamedValue ("WrapNonExceptionThrows") as BoolConstant;
 665                                 if (val != null)
 666                                         wrap_non_exception_throws = val.Value;
 667                         }
 668                 }
 669
 670                 protected void ResolveAssemblySecurityAttributes ()
 671                 {
 672                         string key_file = null;
 673                         string key_container = null;
 674
 675                         if (module.OptAttributes != null) {
 676                                 foreach (Attribute a in module.OptAttributes.Attrs) {
 677                                         // cannot rely on any resolve-based members before you call Resolve
 678                                         if (a.ExplicitTarget != "assembly")
 679                                                 continue;
 680
 681                                         // TODO: This code is buggy: comparing Attribute name without resolving is wrong.
 682                                         //       However, this is invoked by CodeGen.Init, when none of the namespaces
 683                                         //       are loaded yet.
 684                                         // TODO: Does not handle quoted attributes properly
 685                                         switch (a.Name) {
 686                                         case "AssemblyKeyFile":
 687                                         case "AssemblyKeyFileAttribute":
 688                                         case "System.Reflection.AssemblyKeyFileAttribute":
 689                                                 if (Compiler.Settings.StrongNameKeyFile != null) {
 690                                                         Report.SymbolRelatedToPreviousError (a.Location, a.GetSignatureForError ());
 691                                                         Report.Warning (1616, 1, "Option `{0}' overrides attribute `{1}' given in a source file or added module",
 692                                                                         "keyfile", "System.Reflection.AssemblyKeyFileAttribute");
 693                                                 } else {
 694                                                         string value = a.GetString ();
 695                                                         if (!string.IsNullOrEmpty (value)) {
 696                                                                 Error_ObsoleteSecurityAttribute (a, "keyfile");
 697                                                                 key_file = value;
 698                                                         }
 699                                                 }
 700                                                 break;
 701                                         case "AssemblyKeyName":
 702                                         case "AssemblyKeyNameAttribute":
 703                                         case "System.Reflection.AssemblyKeyNameAttribute":
 704                                                 if (Compiler.Settings.StrongNameKeyContainer != null) {
 705                                                         Report.SymbolRelatedToPreviousError (a.Location, a.GetSignatureForError ());
 706                                                         Report.Warning (1616, 1, "Option `{0}' overrides attribute `{1}' given in a source file or added module",
 707                                                                         "keycontainer", "System.Reflection.AssemblyKeyNameAttribute");
 708                                                 } else {
 709                                                         string value = a.GetString ();
 710                                                         if (!string.IsNullOrEmpty (value)) {
 711                                                                 Error_ObsoleteSecurityAttribute (a, "keycontainer");
 712                                                                 key_container = value;
 713                                                         }
 714                                                 }
 715                                                 break;
 716                                         case "AssemblyDelaySign":
 717                                         case "AssemblyDelaySignAttribute":
 718                                         case "System.Reflection.AssemblyDelaySignAttribute":
 719                                                 bool b = a.GetBoolean ();
 720                                                 if (b) {
 721                                                         Error_ObsoleteSecurityAttribute (a, "delaysign");
 722                                                 }
 723
 724                                                 delay_sign = b;
 725                                                 break;
 726                                         }
 727                                 }
 728                         }
 729
 730                         // We came here only to report assembly attributes warnings
 731                         if (public_key != null)
 732                                 return;
 733
 734                         //
 735                         // Load the strong key file found in attributes when no
 736                         // command line key was given
 737                         //
 738                         if (key_file != null || key_container != null) {
 739                                 LoadPublicKey (key_file, key_container);
 740                         } else if (delay_sign) {
 741                                 Report.Warning (1607, 1, "Delay signing was requested but no key file was given");
 742                         }
 743                 }
 744
 745                 public void EmbedResources ()
 746                 {
 747                         //
 748                         // Add Win32 resources
 749                         //
 750                         if (Compiler.Settings.Win32ResourceFile != null) {
 751                                 Builder.DefineUnmanagedResource (Compiler.Settings.Win32ResourceFile);
 752                         } else {
 753                                 Builder.DefineVersionInfoResource ();
 754                         }
 755
 756                         if (Compiler.Settings.Win32IconFile != null) {
 757                                 builder_extra.DefineWin32IconResource (Compiler.Settings.Win32IconFile);
 758                         }
 759
 760                         if (Compiler.Settings.Resources != null) {
 761                                 if (Compiler.Settings.Target == Target.Module) {
 762                                         Report.Error (1507, "Cannot link resource file when building a module");
 763                                 } else {
 764                                         int counter = 0;
 765                                         foreach (var res in Compiler.Settings.Resources) {
 766                                                 if (!File.Exists (res.FileName)) {
 767                                                         Report.Error (1566, "Error reading resource file `{0}'", res.FileName);
 768                                                         continue;
 769                                                 }
 770
 771                                                 if (res.IsEmbeded) {
 772                                                         Stream stream;
 773                                                         if (counter++ < 10) {
 774                                                                 stream = File.OpenRead (res.FileName);
 775                                                         } else {
 776                                                                 // TODO: SRE API requires resource stream to be available during AssemblyBuilder::Save
 777                                                                 // we workaround it by reading everything into memory to compile projects with
 778                                                                 // many embedded resource (over 3500) references
 779                                                                 stream = new MemoryStream (File.ReadAllBytes (res.FileName));
 780                                                         }
 781
 782                                                         module.Builder.DefineManifestResource (res.Name, stream, res.Attributes);
 783                                                 } else {
 784                                                         Builder.AddResourceFile (res.Name, Path.GetFileName (res.FileName), res.Attributes);
 785                                                 }
 786                                         }
 787                                 }
 788                         }
 789                 }
 790
 791                 public void Save ()
 792                 {
 793                         PortableExecutableKinds pekind;
 794                         ImageFileMachine machine;
 795
 796                         switch (Compiler.Settings.Platform) {
 797                         case Platform.X86:
 798                                 pekind = PortableExecutableKinds.Required32Bit | PortableExecutableKinds.ILOnly;
 799                                 machine = ImageFileMachine.I386;
 800                                 break;
 801                         case Platform.X64:
 802                                 pekind = PortableExecutableKinds.ILOnly;
 803                                 machine = ImageFileMachine.AMD64;
 804                                 break;
 805                         case Platform.IA64:
 806                                 pekind = PortableExecutableKinds.ILOnly;
 807                                 machine = ImageFileMachine.IA64;
 808                                 break;
 809                         case Platform.AnyCPU:
 810                         default:
 811                                 pekind = PortableExecutableKinds.ILOnly;
 812                                 machine = ImageFileMachine.I386;
 813                                 break;
 814                         }
 815
 816                         Compiler.TimeReporter.Start (TimeReporter.TimerType.OutputSave);
 817                         try {
 818                                 if (Compiler.Settings.Target == Target.Module) {
 819                                         SaveModule (pekind, machine);
 820                                 } else {
 821                                         Builder.Save (module.Builder.ScopeName, pekind, machine);
 822                                 }
 823                         } catch (Exception e) {
 824                                 Report.Error (16, "Could not write to file `" + name + "', cause: " + e.Message);
 825                         }
 826                         Compiler.TimeReporter.Stop (TimeReporter.TimerType.OutputSave);
 827
 828                         // Save debug symbols file
 829                         if (symbol_writer != null && Compiler.Report.Errors == 0) {
 830                                 // TODO: it should run in parallel
 831                                 Compiler.TimeReporter.Start (TimeReporter.TimerType.DebugSave);
 832                                 symbol_writer.WriteSymbolFile (SymbolWriter.GetGuid (module.Builder));
 833                                 Compiler.TimeReporter.Stop (TimeReporter.TimerType.DebugSave);
 834                         }
 835                 }
 836
 837                 protected virtual void SaveModule (PortableExecutableKinds pekind, ImageFileMachine machine)
 838                 {
 839                         Report.RuntimeMissingSupport (Location.Null, "-target:module");
 840                 }
 841
 842                 void SetCustomAttribute (MethodSpec ctor, byte[] data)
 843                 {
 844                         if (module_target_attrs != null)
 845                                 module_target_attrs.AddAssemblyAttribute (ctor, data);
 846                         else
 847                                 Builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), data);
 848                 }
 849
 850                 void SetEntryPoint ()
 851                 {
 852                         if (!Compiler.Settings.NeedsEntryPoint) {
 853                                 if (Compiler.Settings.MainClass != null)
 854                                         Report.Error (2017, "Cannot specify -main if building a module or library");
 855
 856                                 return;
 857                         }
 858
 859                         PEFileKinds file_kind;
 860
 861                         switch (Compiler.Settings.Target) {
 862                         case Target.Library:
 863                         case Target.Module:
 864                                 file_kind = PEFileKinds.Dll;
 865                                 break;
 866                         case Target.WinExe:
 867                                 file_kind = PEFileKinds.WindowApplication;
 868                                 break;
 869                         default:
 870                                 file_kind = PEFileKinds.ConsoleApplication;
 871                                 break;
 872                         }
 873
 874                         if (entry_point == null) {
 875                                 string main_class = Compiler.Settings.MainClass;
 876                                 if (main_class != null) {
 877                                         // TODO: Handle dotted names
 878                                         var texpr = module.GlobalRootNamespace.LookupType (module, main_class, 0, LookupMode.Probing, Location.Null);
 879                                         if (texpr == null) {
 880                                                 Report.Error (1555, "Could not find `{0}' specified for Main method", main_class);
 881                                                 return;
 882                                         }
 883
 884                                         var mtype = texpr.Type.MemberDefinition as ClassOrStruct;
 885                                         if (mtype == null) {
 886                                                 Report.Error (1556, "`{0}' specified for Main method must be a valid class or struct", main_class);
 887                                                 return;
 888                                         }
 889
 890                                         Report.Error (1558, mtype.Location, "`{0}' does not have a suitable static Main method", mtype.GetSignatureForError ());
 891                                 } else {
 892                                         string pname = file_name == null ? name : Path.GetFileName (file_name);
 893                                         Report.Error (5001, "Program `{0}' does not contain a static `Main' method suitable for an entry point",
 894                                                 pname);
 895                                 }
 896
 897                                 return;
 898                         }
 899
 900                         Builder.SetEntryPoint (entry_point.MethodBuilder, file_kind);
 901                 }
 902
 903                 void Error_ObsoleteSecurityAttribute (Attribute a, string option)
 904                 {
 905                         Report.Warning (1699, 1, a.Location,
 906                                 "Use compiler option `{0}' or appropriate project settings instead of `{1}' attribute",
 907                                 option, a.Name);
 908                 }
 909
 910                 void Error_AssemblySigning (string text)
 911                 {
 912                         Report.Error (1548, "Error during assembly signing. " + text);
 913                 }
 914
 915                 public bool IsFriendAssemblyTo (IAssemblyDefinition assembly)
 916                 {
 917                         return false;
 918                 }
 919
 920                 static Version IsValidAssemblyVersion (string version, bool allowGenerated)
 921                 {
 922                         string[] parts = version.Split ('.');
 923                         if (parts.Length < 1 || parts.Length > 4)
 924                                 return null;
 925
 926                         var values = new int[4];
 927                         for (int i = 0; i < parts.Length; ++i) {
 928                                 if (!int.TryParse (parts[i], out values[i])) {
 929                                         if (parts[i].Length == 1 && parts[i][0] == '*' && allowGenerated) {
 930                                                 if (i == 2) {
 931                                                         // Nothing can follow *
 932                                                         if (parts.Length > 3)
 933                                                                 return null;
 934
 935                                                         // Generate Build value based on days since 1/1/2000
 936                                                         TimeSpan days = DateTime.Today - new DateTime (2000, 1, 1);
 937                                                         values[i] = System.Math.Max (days.Days, 0);
 938                                                         i = 3;
 939                                                 }
 940
 941                                                 if (i == 3) {
 942                                                         // Generate Revision value based on every other second today
 943                                                         var seconds = DateTime.Now - DateTime.Today;
 944                                                         values[i] = (int) seconds.TotalSeconds / 2;
 945                                                         continue;
 946                                                 }
 947                                         }
 948
 949                                         return null;
 950                                 }
 951
 952                                 if (values[i] > ushort.MaxValue)
 953                                         return null;
 954                         }
 955
 956                         return new Version (values[0], values[1], values[2], values[3]);
 957                 }
 958         }
 959
 960         public class AssemblyResource : IEquatable<AssemblyResource>
 961         {
 962                 public AssemblyResource (string fileName, string name)
 963                         : this (fileName, name, false)
 964                 {
 965                 }
 966
 967                 public AssemblyResource (string fileName, string name, bool isPrivate)
 968                 {
 969                         FileName = fileName;
 970                         Name = name;
 971                         Attributes = isPrivate ? ResourceAttributes.Private : ResourceAttributes.Public;
 972                 }
 973
 974                 public ResourceAttributes Attributes { get; private set; }
 975                 public string Name { get; private set; }
 976                 public string FileName { get; private set; }
 977                 public bool IsEmbeded { get; set; }
 978
 979                 #region IEquatable<AssemblyResource> Members
 980
 981                 public bool Equals (AssemblyResource other)
 982                 {
 983                         return Name == other.Name;
 984                 }
 985
 986                 #endregion
 987         }
 988
 989         //
 990         // A placeholder class for assembly attributes when emitting module
 991         //
 992         class AssemblyAttributesPlaceholder : CompilerGeneratedClass
 993         {
 994                 static readonly string TypeNamePrefix = "<$AssemblyAttributes${0}>";
 995                 public static readonly string AssemblyFieldName = "attributes";
 996
 997                 Field assembly;
 998
 999                 public AssemblyAttributesPlaceholder (ModuleContainer parent, string outputName)
1000                         : base (parent, new MemberName (GetGeneratedName (outputName)), Modifiers.STATIC)
1001                 {
1002                         assembly = new Field (this, new TypeExpression (parent.Compiler.BuiltinTypes.Object, Location), Modifiers.PUBLIC | Modifiers.STATIC,
1003                                 new MemberName (AssemblyFieldName), null);
1004
1005                         AddField (assembly);
1006                 }
1007
1008                 public void AddAssemblyAttribute (MethodSpec ctor, byte[] data)
1009                 {
1010                         assembly.SetCustomAttribute (ctor, data);
1011                 }
1012
1013                 public static string GetGeneratedName (string outputName)
1014                 {
1015                         return string.Format (TypeNamePrefix, outputName);
1016                 }
1017         }
1018
1019         //
1020         // Extension to System.Reflection.Emit.AssemblyBuilder to have fully compatible
1021         // compiler. This is a default implementation for framework System.Reflection.Emit
1022         // which does not implement any of the methods
1023         //
1024         public class AssemblyBuilderExtension
1025         {
1026                 readonly CompilerContext ctx;
1027
1028                 public AssemblyBuilderExtension (CompilerContext ctx)
1029                 {
1030                         this.ctx = ctx;
1031                 }
1032
1033                 public virtual System.Reflection.Module AddModule (string module)
1034                 {
1035                         ctx.Report.RuntimeMissingSupport (Location.Null, "-addmodule");
1036                         return null;
1037                 }
1038
1039                 public virtual void AddPermissionRequests (PermissionSet[] permissions)
1040                 {
1041                         ctx.Report.RuntimeMissingSupport (Location.Null, "assembly declarative security");
1042                 }
1043
1044                 public virtual void AddTypeForwarder (TypeSpec type, Location loc)
1045                 {
1046                         ctx.Report.RuntimeMissingSupport (loc, "TypeForwardedToAttribute");
1047                 }
1048
1049                 public virtual void DefineWin32IconResource (string fileName)
1050                 {
1051                         ctx.Report.RuntimeMissingSupport (Location.Null, "-win32icon");
1052                 }
1053
1054                 public virtual void SetAlgorithmId (uint value, Location loc)
1055                 {
1056                         ctx.Report.RuntimeMissingSupport (loc, "AssemblyAlgorithmIdAttribute");
1057                 }
1058
1059                 public virtual void SetCulture (string culture, Location loc)
1060                 {
1061                         ctx.Report.RuntimeMissingSupport (loc, "AssemblyCultureAttribute");
1062                 }
1063
1064                 public virtual void SetFlags (uint flags, Location loc)
1065                 {
1066                         ctx.Report.RuntimeMissingSupport (loc, "AssemblyFlagsAttribute");
1067                 }
1068
1069                 public virtual void SetVersion (Version version, Location loc)
1070                 {
1071                         ctx.Report.RuntimeMissingSupport (loc, "AssemblyVersionAttribute");
1072                 }
1073         }
1074
1075         abstract class AssemblyReferencesLoader<T>
1076         {
1077                 protected readonly CompilerContext compiler;
1078
1079                 protected readonly List<string> paths;
1080
1081                 public AssemblyReferencesLoader (CompilerContext compiler)
1082                 {
1083                         this.compiler = compiler;
1084
1085                         paths = new List<string> ();
1086                         paths.AddRange (compiler.Settings.ReferencesLookupPaths);
1087                         paths.Add (Directory.GetCurrentDirectory ());
1088                 }
1089
1090                 public abstract bool HasObjectType (T assembly);
1091                 protected abstract string[] GetDefaultReferences ();
1092                 public abstract T LoadAssemblyFile (string fileName, bool isImplicitReference);
1093                 public abstract void LoadReferences (ModuleContainer module);
1094
1095                 protected void Error_FileNotFound (string fileName)
1096                 {
1097                         compiler.Report.Error (6, "Metadata file `{0}' could not be found", fileName);
1098                 }
1099
1100                 protected void Error_FileCorrupted (string fileName)
1101                 {
1102                         compiler.Report.Error (9, "Metadata file `{0}' does not contain valid metadata", fileName);
1103                 }
1104
1105                 protected void Error_AssemblyIsModule (string fileName)
1106                 {
1107                         compiler.Report.Error (1509,
1108                                 "Referenced assembly file `{0}' is a module. Consider using `-addmodule' option to add the module",
1109                                 fileName);
1110                 }
1111
1112                 protected void Error_ModuleIsAssembly (string fileName)
1113                 {
1114                         compiler.Report.Error (1542,
1115                                 "Added module file `{0}' is an assembly. Consider using `-r' option to reference the file",
1116                                 fileName);
1117                 }
1118
1119                 protected void LoadReferencesCore (ModuleContainer module, out T corlib_assembly, out List<Tuple<RootNamespace, T>> loaded)
1120                 {
1121                         compiler.TimeReporter.Start (TimeReporter.TimerType.ReferencesLoading);
1122
1123                         loaded = new List<Tuple<RootNamespace, T>> ();
1124
1125                         //
1126                         // Load mscorlib.dll as the first
1127                         //
1128                         if (module.Compiler.Settings.StdLib) {
1129                                 corlib_assembly = LoadAssemblyFile ("mscorlib.dll", true);
1130                         } else {
1131                                 corlib_assembly = default (T);
1132                         }
1133
1134                         T a;
1135                         foreach (string r in module.Compiler.Settings.AssemblyReferences) {
1136                                 a = LoadAssemblyFile (r, false);
1137                                 if (a == null || EqualityComparer<T>.Default.Equals (a, corlib_assembly))
1138                                         continue;
1139
1140                                 var key = Tuple.Create (module.GlobalRootNamespace, a);
1141                                 if (loaded.Contains (key))
1142                                         continue;
1143
1144                                 // A corlib assembly is the first assembly which contains System.Object
1145                                 if (corlib_assembly == null && HasObjectType (a)) {
1146                                         corlib_assembly = a;
1147                                         continue;
1148                                 }
1149
1150                                 loaded.Add (key);
1151                         }
1152
1153                         foreach (var entry in module.Compiler.Settings.AssemblyReferencesAliases) {
1154                                 a = LoadAssemblyFile (entry.Item2, false);
1155                                 if (a == null)
1156                                         continue;
1157
1158                                 var key = Tuple.Create (module.CreateRootNamespace (entry.Item1), a);
1159                                 if (loaded.Contains (key))
1160                                         continue;
1161
1162                                 loaded.Add (key);
1163                         }
1164
1165                         if (compiler.Settings.LoadDefaultReferences) {
1166                                 foreach (string r in GetDefaultReferences ()) {
1167                                         a = LoadAssemblyFile (r, true);
1168                                         if (a == null)
1169                                                 continue;
1170
1171                                         var key = Tuple.Create (module.GlobalRootNamespace, a);
1172                                         if (loaded.Contains (key))
1173                                                 continue;
1174
1175                                         loaded.Add (key);
1176                                 }
1177                         }
1178
1179                         compiler.TimeReporter.Stop (TimeReporter.TimerType.ReferencesLoading);
1180                 }
1181         }
1182 }