mcs/class/Mono.Security/Mono.Security.X509/PKCS12.cs

   1 //
   2 // PKCS12.cs: PKCS 12 - Personal Information Exchange Syntax
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@xamarin.com>
   6 //
   7 // (C) 2003 Motus Technologies Inc. (http://www.motus.com)
   8 // Copyright (C) 2004,2005,2006 Novell Inc. (http://www.novell.com)
   9 // Copyright 2013 Xamarin Inc. (http://www.xamarin.com)
  10 //
  11 // Key derivation translated from Bouncy Castle JCE (http://www.bouncycastle.org/)
  12 // See bouncycastle.txt for license.
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Collections;
  36 using System.IO;
  37 using System.Security.Cryptography;
  38 using System.Text;
  39
  40 using Mono.Security;
  41 using Mono.Security.Cryptography;
  42
  43 namespace Mono.Security.X509 {
  44
  45 #if INSIDE_CORLIB
  46         internal
  47 #else
  48         public
  49 #endif
  50         class PKCS5 {
  51
  52                 public const string pbeWithMD2AndDESCBC = "1.2.840.113549.1.5.1";
  53                 public const string pbeWithMD5AndDESCBC = "1.2.840.113549.1.5.3";
  54                 public const string pbeWithMD2AndRC2CBC = "1.2.840.113549.1.5.4";
  55                 public const string pbeWithMD5AndRC2CBC = "1.2.840.113549.1.5.6";
  56                 public const string pbeWithSHA1AndDESCBC = "1.2.840.113549.1.5.10";
  57                 public const string pbeWithSHA1AndRC2CBC = "1.2.840.113549.1.5.11";
  58
  59                 public PKCS5 () {}
  60         }
  61
  62 #if INSIDE_CORLIB
  63         internal
  64 #else
  65         public
  66 #endif
  67         class PKCS9 {
  68
  69                 public const string friendlyName = "1.2.840.113549.1.9.20";
  70                 public const string localKeyId = "1.2.840.113549.1.9.21";
  71
  72                 public PKCS9 () {}
  73         }
  74
  75
  76         internal class SafeBag {
  77                 private string _bagOID;
  78                 private ASN1 _asn1;
  79
  80                 public SafeBag(string bagOID, ASN1 asn1) {
  81                         _bagOID = bagOID;
  82                         _asn1 = asn1;
  83                 }
  84
  85                 public string BagOID {
  86                         get { return _bagOID; }
  87                 }
  88
  89                 public ASN1 ASN1 {
  90                         get { return _asn1; }
  91                 }
  92         }
  93
  94
  95 #if INSIDE_CORLIB
  96         internal
  97 #else
  98         public
  99 #endif
 100         class PKCS12 : ICloneable {
 101
 102                 public const string pbeWithSHAAnd128BitRC4 = "1.2.840.113549.1.12.1.1";
 103                 public const string pbeWithSHAAnd40BitRC4 = "1.2.840.113549.1.12.1.2";
 104                 public const string pbeWithSHAAnd3KeyTripleDESCBC = "1.2.840.113549.1.12.1.3";
 105                 public const string pbeWithSHAAnd2KeyTripleDESCBC = "1.2.840.113549.1.12.1.4";
 106                 public const string pbeWithSHAAnd128BitRC2CBC = "1.2.840.113549.1.12.1.5";
 107                 public const string pbeWithSHAAnd40BitRC2CBC = "1.2.840.113549.1.12.1.6";
 108
 109                 // bags
 110                 public const string keyBag  = "1.2.840.113549.1.12.10.1.1";
 111                 public const string pkcs8ShroudedKeyBag  = "1.2.840.113549.1.12.10.1.2";
 112                 public const string certBag  = "1.2.840.113549.1.12.10.1.3";
 113                 public const string crlBag  = "1.2.840.113549.1.12.10.1.4";
 114                 public const string secretBag  = "1.2.840.113549.1.12.10.1.5";
 115                 public const string safeContentsBag  = "1.2.840.113549.1.12.10.1.6";
 116
 117                 // types
 118                 public const string x509Certificate = "1.2.840.113549.1.9.22.1";
 119                 public const string sdsiCertificate = "1.2.840.113549.1.9.22.2";
 120                 public const string x509Crl = "1.2.840.113549.1.9.23.1";
 121
 122                 // Adapted from BouncyCastle PKCS12ParametersGenerator.java
 123                 public class DeriveBytes {
 124
 125                         public enum Purpose {
 126                                 Key,
 127                                 IV,
 128                                 MAC
 129                         }
 130
 131                         static private byte[] keyDiversifier = { 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 };
 132                         static private byte[] ivDiversifier  = { 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2 };
 133                         static private byte[] macDiversifier = { 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 };
 134
 135                         private string _hashName;
 136                         private int _iterations;
 137                         private byte[] _password;
 138                         private byte[] _salt;
 139
 140                         public DeriveBytes () {}
 141
 142                         public string HashName {
 143                                 get { return _hashName; }
 144                                 set { _hashName = value; }
 145                         }
 146
 147                         public int IterationCount {
 148                                 get { return _iterations; }
 149                                 set { _iterations = value; }
 150                         }
 151
 152                         public byte[] Password {
 153                                 get { return (byte[]) _password.Clone (); }
 154                                 set {
 155                                         if (value == null)
 156                                                 _password = new byte [0];
 157                                         else
 158                                                 _password = (byte[]) value.Clone ();
 159                                 }
 160                         }
 161
 162                         public byte[] Salt {
 163                                 get { return (byte[]) _salt.Clone ();  }
 164                                 set {
 165                                         if (value != null)
 166                                                 _salt = (byte[]) value.Clone ();
 167                                         else
 168                                                 _salt = null;
 169                                 }
 170                         }
 171
 172                         private void Adjust (byte[] a, int aOff, byte[] b)
 173                         {
 174                                 int x = (b[b.Length - 1] & 0xff) + (a [aOff + b.Length - 1] & 0xff) + 1;
 175
 176                                 a [aOff + b.Length - 1] = (byte) x;
 177                                 x >>= 8;
 178
 179                                 for (int i = b.Length - 2; i >= 0; i--) {
 180                                         x += (b [i] & 0xff) + (a [aOff + i] & 0xff);
 181                                         a [aOff + i] = (byte) x;
 182                                         x >>= 8;
 183                                 }
 184                         }
 185
 186                         private byte[] Derive (byte[] diversifier, int n)
 187                         {
 188                                 HashAlgorithm digest = PKCS1.CreateFromName (_hashName);
 189                                 int u = (digest.HashSize >> 3); // div 8
 190                                 int v = 64;
 191                                 byte[] dKey = new byte [n];
 192
 193                                 byte[] S;
 194                                 if ((_salt != null) && (_salt.Length != 0)) {
 195                                         S = new byte[v * ((_salt.Length + v - 1) / v)];
 196
 197                                         for (int i = 0; i != S.Length; i++) {
 198                                                 S[i] = _salt[i % _salt.Length];
 199                                         }
 200                                 }
 201                                 else {
 202                                         S = new byte[0];
 203                                 }
 204
 205                                 byte[] P;
 206                                 if ((_password != null) && (_password.Length != 0)) {
 207                                         P = new byte[v * ((_password.Length + v - 1) / v)];
 208
 209                                         for (int i = 0; i != P.Length; i++) {
 210                                                 P[i] = _password[i % _password.Length];
 211                                         }
 212                                 }
 213                                 else {
 214                                         P = new byte[0];
 215                                 }
 216
 217                                 byte[] I = new byte [S.Length + P.Length];
 218
 219                                 Buffer.BlockCopy (S, 0, I, 0, S.Length);
 220                                 Buffer.BlockCopy (P, 0, I, S.Length, P.Length);
 221
 222                                 byte[]  B = new byte[v];
 223                                 int     c = (n + u - 1) / u;
 224
 225                                 for (int i = 1; i <= c; i++) {
 226                                         digest.TransformBlock (diversifier, 0, diversifier.Length, diversifier, 0);
 227                                         digest.TransformFinalBlock (I, 0, I.Length);
 228                                         byte[] A = digest.Hash;
 229                                         digest.Initialize ();
 230                                         for (int j = 1; j != _iterations; j++) {
 231                                                 A = digest.ComputeHash (A, 0, A.Length);
 232                                         }
 233
 234                                         for (int j = 0; j != B.Length; j++) {
 235                                                 B [j] = A [j % A.Length];
 236                                         }
 237
 238                                         for (int j = 0; j != I.Length / v; j++) {
 239                                                 Adjust (I, j * v, B);
 240                                         }
 241
 242                                         if (i == c) {
 243                                                 Buffer.BlockCopy(A, 0, dKey, (i - 1) * u, dKey.Length - ((i - 1) * u));
 244                                         }
 245                                         else {
 246                                                 Buffer.BlockCopy(A, 0, dKey, (i - 1) * u, A.Length);
 247                                         }
 248                                 }
 249
 250                                 return dKey;
 251                         }
 252
 253                         public byte[] DeriveKey (int size)
 254                         {
 255                                 return Derive (keyDiversifier, size);
 256                         }
 257
 258                         public byte[] DeriveIV (int size)
 259                         {
 260                                 return Derive (ivDiversifier, size);
 261                         }
 262
 263                         public byte[] DeriveMAC (int size)
 264                         {
 265                                 return Derive (macDiversifier, size);
 266                         }
 267                 }
 268
 269                 const int recommendedIterationCount = 2000;
 270
 271                 //private int _version;
 272                 private byte[] _password;
 273                 private ArrayList _keyBags;
 274                 private ArrayList _secretBags;
 275                 private X509CertificateCollection _certs;
 276                 private bool _keyBagsChanged;
 277                 private bool _secretBagsChanged;
 278                 private bool _certsChanged;
 279                 private int _iterations;
 280                 private ArrayList _safeBags;
 281                 private RandomNumberGenerator _rng;
 282
 283                 // constructors
 284
 285                 public PKCS12 ()
 286                 {
 287                         _iterations = recommendedIterationCount;
 288                         _keyBags = new ArrayList ();
 289                         _secretBags = new ArrayList ();
 290                         _certs = new X509CertificateCollection ();
 291                         _keyBagsChanged = false;
 292                         _secretBagsChanged = false;
 293                         _certsChanged = false;
 294                         _safeBags = new ArrayList ();
 295                 }
 296
 297                 public PKCS12 (byte[] data)
 298                         : this ()
 299                 {
 300                         Password = null;
 301                         Decode (data);
 302                 }
 303
 304                 /*
 305                  * PFX ::= SEQUENCE {
 306                  *      version INTEGER {v3(3)}(v3,...),
 307                  *      authSafe ContentInfo,
 308                  *      macData MacData OPTIONAL
 309                  * }
 310                  *
 311                  * MacData ::= SEQUENCE {
 312                  *      mac DigestInfo,
 313                  *      macSalt OCTET STRING,
 314                  *      iterations INTEGER DEFAULT 1
 315                  *      -- Note: The default is for historical reasons and its use is deprecated. A higher
 316                  *      -- value, like 1024 is recommended.
 317                  * }
 318                  *
 319                  * SafeContents ::= SEQUENCE OF SafeBag
 320                  *
 321                  * SafeBag ::= SEQUENCE {
 322                  *      bagId BAG-TYPE.&id ({PKCS12BagSet}),
 323                  *      bagValue [0] EXPLICIT BAG-TYPE.&Type({PKCS12BagSet}{@bagId}),
 324                  *      bagAttributes SET OF PKCS12Attribute OPTIONAL
 325                  * }
 326                  */
 327                 public PKCS12 (byte[] data, string password)
 328                         : this ()
 329                 {
 330                         Password = password;
 331                         Decode (data);
 332                 }
 333
 334                 public PKCS12 (byte[] data, byte[] password)
 335                         : this ()
 336                 {
 337                         _password = password;
 338                         Decode (data);
 339                 }
 340
 341                 private void Decode (byte[] data)
 342                 {
 343                         ASN1 pfx = new ASN1 (data);
 344                         if (pfx.Tag != 0x30)
 345                                 throw new ArgumentException ("invalid data");
 346
 347                         ASN1 version = pfx [0];
 348                         if (version.Tag != 0x02)
 349                                 throw new ArgumentException ("invalid PFX version");
 350                         //_version = version.Value [0];
 351
 352                         PKCS7.ContentInfo authSafe = new PKCS7.ContentInfo (pfx [1]);
 353                         if (authSafe.ContentType != PKCS7.Oid.data)
 354                                 throw new ArgumentException ("invalid authenticated safe");
 355
 356                         // now that we know it's a PKCS#12 file, check the (optional) MAC
 357                         // before decoding anything else in the file
 358                         if (pfx.Count > 2) {
 359                                 ASN1 macData = pfx [2];
 360                                 if (macData.Tag != 0x30)
 361                                         throw new ArgumentException ("invalid MAC");
 362
 363                                 ASN1 mac = macData [0];
 364                                 if (mac.Tag != 0x30)
 365                                         throw new ArgumentException ("invalid MAC");
 366                                 ASN1 macAlgorithm = mac [0];
 367                                 string macOid = ASN1Convert.ToOid (macAlgorithm [0]);
 368                                 if (macOid != "1.3.14.3.2.26")
 369                                         throw new ArgumentException ("unsupported HMAC");
 370                                 byte[] macValue = mac [1].Value;
 371
 372                                 ASN1 macSalt = macData [1];
 373                                 if (macSalt.Tag != 0x04)
 374                                         throw new ArgumentException ("missing MAC salt");
 375
 376                                 _iterations = 1; // default value
 377                                 if (macData.Count > 2) {
 378                                         ASN1 iters = macData [2];
 379                                         if (iters.Tag != 0x02)
 380                                                 throw new ArgumentException ("invalid MAC iteration");
 381                                         _iterations = ASN1Convert.ToInt32 (iters);
 382                                 }
 383
 384                                 byte[] authSafeData = authSafe.Content [0].Value;
 385                                 byte[] calculatedMac = MAC (_password, macSalt.Value, _iterations, authSafeData);
 386                                 if (!Compare (macValue, calculatedMac))
 387                                         throw new CryptographicException ("Invalid MAC - file may have been tampered!");
 388                         }
 389
 390                         // we now returns to our original presentation - PFX
 391                         ASN1 authenticatedSafe = new ASN1 (authSafe.Content [0].Value);
 392                         for (int i=0; i < authenticatedSafe.Count; i++) {
 393                                 PKCS7.ContentInfo ci = new PKCS7.ContentInfo (authenticatedSafe [i]);
 394                                 switch (ci.ContentType) {
 395                                         case PKCS7.Oid.data:
 396                                                 // unencrypted (by PKCS#12)
 397                                                 ASN1 safeContents = new ASN1 (ci.Content [0].Value);
 398                                                 for (int j=0; j < safeContents.Count; j++) {
 399                                                         ASN1 safeBag = safeContents [j];
 400                                                         ReadSafeBag (safeBag);
 401                                                 }
 402                                                 break;
 403                                         case PKCS7.Oid.encryptedData:
 404                                                 // password encrypted
 405                                                 PKCS7.EncryptedData ed = new PKCS7.EncryptedData (ci.Content [0]);
 406                                                 ASN1 decrypted = new ASN1 (Decrypt (ed));
 407                                                 for (int j=0; j < decrypted.Count; j++) {
 408                                                         ASN1 safeBag = decrypted [j];
 409                                                         ReadSafeBag (safeBag);
 410                                                 }
 411                                                 break;
 412                                         case PKCS7.Oid.envelopedData:
 413                                                 // public key encrypted
 414                                                 throw new NotImplementedException ("public key encrypted");
 415                                         default:
 416                                                 throw new ArgumentException ("unknown authenticatedSafe");
 417                                 }
 418                         }
 419                 }
 420
 421                 ~PKCS12 ()
 422                 {
 423                         if (_password != null) {
 424                                 Array.Clear (_password, 0, _password.Length);
 425                         }
 426                         _password = null;
 427                 }
 428
 429                 // properties
 430
 431                 public string Password {
 432                         set {
 433                                 if (value != null) {
 434                                         if (value.Length > 0) {
 435                                                 int size = value.Length;
 436                                                 int nul = 0;
 437                                                 if (size < MaximumPasswordLength) {
 438                                                         // if not present, add space for a NULL (0x00) character
 439                                                         if (value[size - 1] != 0x00)
 440                                                                 nul = 1;
 441                                                 } else {
 442                                                         size = MaximumPasswordLength;
 443                                                 }
 444                                                 _password = new byte[(size + nul) << 1]; // double for unicode
 445                                                 Encoding.BigEndianUnicode.GetBytes (value, 0, size, _password, 0);
 446                                         } else {
 447                                                 // double-byte (Unicode) NULL (0x00) - see bug #79617
 448                                                 _password = new byte[2];
 449                                         }
 450                                 } else {
 451                                         // no password
 452                                         _password = null;
 453                                 }
 454                         }
 455                 }
 456
 457                 public int IterationCount {
 458                         get { return _iterations; }
 459                         set { _iterations = value; }
 460                 }
 461
 462                 public ArrayList Keys {
 463                         get {
 464                                 if (_keyBagsChanged) {
 465                                         _keyBags.Clear ();
 466                                         foreach (SafeBag sb in _safeBags) {
 467                                                 if (sb.BagOID.Equals (keyBag)) {
 468                                                         ASN1 safeBag = sb.ASN1;
 469                                                         ASN1 bagValue = safeBag [1];
 470                                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
 471                                                         byte[] privateKey = pki.PrivateKey;
 472                                                         switch (privateKey [0]) {
 473                                                         case 0x02:
 474                                                                 DSAParameters p = new DSAParameters (); // FIXME
 475                                                                 _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p));
 476                                                                 break;
 477                                                         case 0x30:
 478                                                                 _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeRSA (privateKey));
 479                                                                 break;
 480                                                         default:
 481                                                                 break;
 482                                                         }
 483                                                         Array.Clear (privateKey, 0, privateKey.Length);
 484
 485                                                 } else if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
 486                                                         ASN1 safeBag = sb.ASN1;
 487                                                         ASN1 bagValue = safeBag [1];
 488                                                         PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
 489                                                         byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
 490                                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
 491                                                         byte[] privateKey = pki.PrivateKey;
 492                                                         switch (privateKey [0]) {
 493                                                         case 0x02:
 494                                                                 DSAParameters p = new DSAParameters (); // FIXME
 495                                                                 _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p));
 496                                                                 break;
 497                                                         case 0x30:
 498                                                                 _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeRSA (privateKey));
 499                                                                 break;
 500                                                         default:
 501                                                                 break;
 502                                                         }
 503                                                         Array.Clear (privateKey, 0, privateKey.Length);
 504                                                         Array.Clear (decrypted, 0, decrypted.Length);
 505                                                 }
 506                                         }
 507                                         _keyBagsChanged = false;
 508                                 }
 509                                 return ArrayList.ReadOnly(_keyBags);
 510                         }
 511                 }
 512
 513                 public ArrayList Secrets {
 514                         get {
 515                                 if (_secretBagsChanged) {
 516                                         _secretBags.Clear ();
 517                                         foreach (SafeBag sb in _safeBags) {
 518                                                 if (sb.BagOID.Equals (secretBag)) {
 519                                                         ASN1 safeBag = sb.ASN1;
 520                                                         ASN1 bagValue = safeBag [1];
 521                                                         byte[] secret = bagValue.Value;
 522                                                         _secretBags.Add(secret);
 523                                                 }
 524                                         }
 525                                         _secretBagsChanged = false;
 526                                 }
 527                                 return ArrayList.ReadOnly(_secretBags);
 528                         }
 529                 }
 530
 531                 public X509CertificateCollection Certificates {
 532                         get {
 533                                 if (_certsChanged) {
 534                                         _certs.Clear ();
 535                                         foreach (SafeBag sb in _safeBags) {
 536                                                 if (sb.BagOID.Equals (certBag)) {
 537                                                         ASN1 safeBag = sb.ASN1;
 538                                                         ASN1 bagValue = safeBag [1];
 539                                                         PKCS7.ContentInfo cert = new PKCS7.ContentInfo (bagValue.Value);
 540                                                         _certs.Add (new X509Certificate (cert.Content [0].Value));
 541                                                 }
 542                                         }
 543                                         _certsChanged = false;
 544                                 }
 545                                 return _certs;
 546                         }
 547                 }
 548
 549                 internal RandomNumberGenerator RNG {
 550                         get {
 551                                 if (_rng == null)
 552                                         _rng = RandomNumberGenerator.Create ();
 553                                 return _rng;
 554                         }
 555                 }
 556
 557                 // private methods
 558
 559                 private bool Compare (byte[] expected, byte[] actual)
 560                 {
 561                         bool compare = false;
 562                         if (expected.Length == actual.Length) {
 563                                 for (int i=0; i < expected.Length; i++) {
 564                                         if (expected [i] != actual [i])
 565                                                 return false;
 566                                 }
 567                                 compare = true;
 568                         }
 569                         return compare;
 570                 }
 571
 572                 private SymmetricAlgorithm GetSymmetricAlgorithm (string algorithmOid, byte[] salt, int iterationCount)
 573                 {
 574                         string algorithm = null;
 575                         int keyLength = 8;      // 64 bits (default)
 576                         int ivLength = 8;       // 64 bits (default)
 577
 578                         PKCS12.DeriveBytes pd = new PKCS12.DeriveBytes ();
 579                         pd.Password = _password;
 580                         pd.Salt = salt;
 581                         pd.IterationCount = iterationCount;
 582
 583                         switch (algorithmOid) {
 584                                 case PKCS5.pbeWithMD2AndDESCBC:                 // no unit test available
 585                                         pd.HashName = "MD2";
 586                                         algorithm = "DES";
 587                                         break;
 588                                 case PKCS5.pbeWithMD5AndDESCBC:                 // no unit test available
 589                                         pd.HashName = "MD5";
 590                                         algorithm = "DES";
 591                                         break;
 592                                 case PKCS5.pbeWithMD2AndRC2CBC:                 // no unit test available
 593                                         // TODO - RC2-CBC-Parameter (PKCS5)
 594                                         // if missing default to 32 bits !!!
 595                                         pd.HashName = "MD2";
 596                                         algorithm = "RC2";
 597                                         keyLength = 4;          // default
 598                                         break;
 599                                 case PKCS5.pbeWithMD5AndRC2CBC:                 // no unit test available
 600                                         // TODO - RC2-CBC-Parameter (PKCS5)
 601                                         // if missing default to 32 bits !!!
 602                                         pd.HashName = "MD5";
 603                                         algorithm = "RC2";
 604                                         keyLength = 4;          // default
 605                                         break;
 606                                 case PKCS5.pbeWithSHA1AndDESCBC:                // no unit test available
 607                                         pd.HashName = "SHA1";
 608                                         algorithm = "DES";
 609                                         break;
 610                                 case PKCS5.pbeWithSHA1AndRC2CBC:                // no unit test available
 611                                         // TODO - RC2-CBC-Parameter (PKCS5)
 612                                         // if missing default to 32 bits !!!
 613                                         pd.HashName = "SHA1";
 614                                         algorithm = "RC2";
 615                                         keyLength = 4;          // default
 616                                         break;
 617                                 case PKCS12.pbeWithSHAAnd128BitRC4:             // no unit test available
 618                                         pd.HashName = "SHA1";
 619                                         algorithm = "RC4";
 620                                         keyLength = 16;
 621                                         ivLength = 0;           // N/A
 622                                         break;
 623                                 case PKCS12.pbeWithSHAAnd40BitRC4:              // no unit test available
 624                                         pd.HashName = "SHA1";
 625                                         algorithm = "RC4";
 626                                         keyLength = 5;
 627                                         ivLength = 0;           // N/A
 628                                         break;
 629                                 case PKCS12.pbeWithSHAAnd3KeyTripleDESCBC:
 630                                         pd.HashName = "SHA1";
 631                                         algorithm = "TripleDES";
 632                                         keyLength = 24;
 633                                         break;
 634                                 case PKCS12.pbeWithSHAAnd2KeyTripleDESCBC:      // no unit test available
 635                                         pd.HashName = "SHA1";
 636                                         algorithm = "TripleDES";
 637                                         keyLength = 16;
 638                                         break;
 639                                 case PKCS12.pbeWithSHAAnd128BitRC2CBC:          // no unit test available
 640                                         pd.HashName = "SHA1";
 641                                         algorithm = "RC2";
 642                                         keyLength = 16;
 643                                         break;
 644                                 case PKCS12.pbeWithSHAAnd40BitRC2CBC:
 645                                         pd.HashName = "SHA1";
 646                                         algorithm = "RC2";
 647                                         keyLength = 5;
 648                                         break;
 649                                 default:
 650                                         throw new NotSupportedException ("unknown oid " + algorithm);
 651                         }
 652
 653                         SymmetricAlgorithm sa = null;
 654 #if INSIDE_CORLIB && FULL_AOT_RUNTIME
 655                         // we do not want CryptoConfig to bring the whole crypto stack
 656                         // in particular Rijndael which is not supported by CommonCrypto
 657                         switch (algorithm) {
 658                         case "DES":
 659                                 sa = DES.Create ();
 660                                 break;
 661                         case "RC2":
 662                                 sa = RC2.Create ();
 663                                 break;
 664                         case "TripleDES":
 665                                 sa = TripleDES.Create ();
 666                                 break;
 667                         case "RC4":
 668                                 sa = RC4.Create ();
 669                                 break;
 670                         default:
 671                                 throw new NotSupportedException (algorithm);
 672                         }
 673 #else
 674                         sa = SymmetricAlgorithm.Create (algorithm);
 675 #endif
 676                         sa.Key = pd.DeriveKey (keyLength);
 677                         // IV required only for block ciphers (not stream ciphers)
 678                         if (ivLength > 0) {
 679                                 sa.IV = pd.DeriveIV (ivLength);
 680                                 sa.Mode = CipherMode.CBC;
 681                         }
 682                         return sa;
 683                 }
 684
 685                 public byte[] Decrypt (string algorithmOid, byte[] salt, int iterationCount, byte[] encryptedData)
 686                 {
 687                         SymmetricAlgorithm sa = null;
 688                         byte[] result = null;
 689                         try {
 690                                 sa = GetSymmetricAlgorithm (algorithmOid, salt, iterationCount);
 691                                 ICryptoTransform ct = sa.CreateDecryptor ();
 692                                 result = ct.TransformFinalBlock (encryptedData, 0, encryptedData.Length);
 693                         }
 694                         finally {
 695                                 if (sa != null)
 696                                         sa.Clear ();
 697                         }
 698                         return result;
 699                 }
 700
 701                 public byte[] Decrypt (PKCS7.EncryptedData ed)
 702                 {
 703                         return Decrypt (ed.EncryptionAlgorithm.ContentType,
 704                                 ed.EncryptionAlgorithm.Content [0].Value,
 705                                 ASN1Convert.ToInt32 (ed.EncryptionAlgorithm.Content [1]),
 706                                 ed.EncryptedContent);
 707                 }
 708
 709                 public byte[] Encrypt (string algorithmOid, byte[] salt, int iterationCount, byte[] data)
 710                 {
 711                         byte[] result = null;
 712                         using (SymmetricAlgorithm sa = GetSymmetricAlgorithm (algorithmOid, salt, iterationCount)) {
 713                                 ICryptoTransform ct = sa.CreateEncryptor ();
 714                                 result = ct.TransformFinalBlock (data, 0, data.Length);
 715                         }
 716                         return result;
 717                 }
 718
 719                 private DSAParameters GetExistingParameters (out bool found)
 720                 {
 721                         foreach (X509Certificate cert in Certificates) {
 722                                 // FIXME: that won't work if parts of the parameters are missing
 723                                 if (cert.KeyAlgorithmParameters != null) {
 724                                         DSA dsa = cert.DSA;
 725                                         if (dsa != null) {
 726                                                 found = true;
 727                                                 return dsa.ExportParameters (false);
 728                                         }
 729                                 }
 730                         }
 731                         found = false;
 732                         return new DSAParameters ();
 733                 }
 734
 735                 private void AddPrivateKey (PKCS8.PrivateKeyInfo pki)
 736                 {
 737                         byte[] privateKey = pki.PrivateKey;
 738                         switch (privateKey [0]) {
 739                                 case 0x02:
 740                                         bool found;
 741                                         DSAParameters p = GetExistingParameters (out found);
 742                                         if (found) {
 743                                                 _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p));
 744                                         }
 745                                         break;
 746                                 case 0x30:
 747                                         _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeRSA (privateKey));
 748                                         break;
 749                                 default:
 750                                         Array.Clear (privateKey, 0, privateKey.Length);
 751                                         throw new CryptographicException ("Unknown private key format");
 752                         }
 753                         Array.Clear (privateKey, 0, privateKey.Length);
 754                 }
 755
 756                 private void ReadSafeBag (ASN1 safeBag)
 757                 {
 758                         if (safeBag.Tag != 0x30)
 759                                 throw new ArgumentException ("invalid safeBag");
 760
 761                         ASN1 bagId = safeBag [0];
 762                         if (bagId.Tag != 0x06)
 763                                 throw new ArgumentException ("invalid safeBag id");
 764
 765                         ASN1 bagValue = safeBag [1];
 766                         string oid = ASN1Convert.ToOid (bagId);
 767                         switch (oid) {
 768                                 case keyBag:
 769                                         // NEED UNIT TEST
 770                                         AddPrivateKey (new PKCS8.PrivateKeyInfo (bagValue.Value));
 771                                         break;
 772                                 case pkcs8ShroudedKeyBag:
 773                                         PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
 774                                         byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
 775                                         AddPrivateKey (new PKCS8.PrivateKeyInfo (decrypted));
 776                                         Array.Clear (decrypted, 0, decrypted.Length);
 777                                         break;
 778                                 case certBag:
 779                                         PKCS7.ContentInfo cert = new PKCS7.ContentInfo (bagValue.Value);
 780                                         if (cert.ContentType != x509Certificate)
 781                                                 throw new NotSupportedException ("unsupport certificate type");
 782                                         X509Certificate x509 = new X509Certificate (cert.Content [0].Value);
 783                                         _certs.Add (x509);
 784                                         break;
 785                                 case crlBag:
 786                                         // TODO
 787                                         break;
 788                                 case secretBag:
 789                                         byte[] secret = bagValue.Value;
 790                                         _secretBags.Add(secret);
 791                                         break;
 792                                 case safeContentsBag:
 793                                         // TODO - ? recurse ?
 794                                         break;
 795                                 default:
 796                                         throw new ArgumentException ("unknown safeBag oid");
 797                         }
 798
 799                         if (safeBag.Count > 2) {
 800                                 ASN1 bagAttributes = safeBag [2];
 801                                 if (bagAttributes.Tag != 0x31)
 802                                         throw new ArgumentException ("invalid safeBag attributes id");
 803
 804                                 for (int i = 0; i < bagAttributes.Count; i++) {
 805                                         ASN1 pkcs12Attribute = bagAttributes[i];
 806
 807                                         if (pkcs12Attribute.Tag != 0x30)
 808                                                 throw new ArgumentException ("invalid PKCS12 attributes id");
 809
 810                                         ASN1 attrId = pkcs12Attribute [0];
 811                                         if (attrId.Tag != 0x06)
 812                                                 throw new ArgumentException ("invalid attribute id");
 813
 814                                         string attrOid = ASN1Convert.ToOid (attrId);
 815
 816                                         ASN1 attrValues = pkcs12Attribute[1];
 817                                         for (int j = 0; j < attrValues.Count; j++) {
 818                                                 ASN1 attrValue = attrValues[j];
 819
 820                                                 switch (attrOid) {
 821                                                 case PKCS9.friendlyName:
 822                                                         if (attrValue.Tag != 0x1e)
 823                                                                 throw new ArgumentException ("invalid attribute value id");
 824                                                         break;
 825                                                 case PKCS9.localKeyId:
 826                                                         if (attrValue.Tag != 0x04)
 827                                                                 throw new ArgumentException ("invalid attribute value id");
 828                                                         break;
 829                                                 default:
 830                                                         // Unknown OID -- don't check Tag
 831                                                         break;
 832                                                 }
 833                                         }
 834                                 }
 835                         }
 836
 837                         _safeBags.Add (new SafeBag(oid, safeBag));
 838                 }
 839
 840                 private ASN1 Pkcs8ShroudedKeyBagSafeBag (AsymmetricAlgorithm aa, IDictionary attributes)
 841                 {
 842                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo ();
 843                         if (aa is RSA) {
 844                                 pki.Algorithm = "1.2.840.113549.1.1.1";
 845                                 pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((RSA)aa);
 846                         }
 847                         else if (aa is DSA) {
 848                                 pki.Algorithm = null;
 849                                 pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((DSA)aa);
 850                         }
 851                         else
 852                                 throw new CryptographicException ("Unknown asymmetric algorithm {0}", aa.ToString ());
 853
 854                         PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo ();
 855                         epki.Algorithm = pbeWithSHAAnd3KeyTripleDESCBC;
 856                         epki.IterationCount = _iterations;
 857                         epki.EncryptedData = Encrypt (pbeWithSHAAnd3KeyTripleDESCBC, epki.Salt, _iterations, pki.GetBytes ());
 858
 859                         ASN1 safeBag = new ASN1 (0x30);
 860                         safeBag.Add (ASN1Convert.FromOid (pkcs8ShroudedKeyBag));
 861                         ASN1 bagValue = new ASN1 (0xA0);
 862                         bagValue.Add (new ASN1 (epki.GetBytes ()));
 863                         safeBag.Add (bagValue);
 864
 865                         if (attributes != null) {
 866                                 ASN1 bagAttributes = new ASN1 (0x31);
 867                                 IDictionaryEnumerator de = attributes.GetEnumerator ();
 868
 869                                 while (de.MoveNext ()) {
 870                                         string oid = (string)de.Key;
 871                                         switch (oid) {
 872                                         case PKCS9.friendlyName:
 873                                                 ArrayList names = (ArrayList)de.Value;
 874                                                 if (names.Count > 0) {
 875                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
 876                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.friendlyName));
 877                                                         ASN1 attrValues = new ASN1 (0x31);
 878                                                         foreach (byte[] name in names) {
 879                                                                 ASN1 attrValue = new ASN1 (0x1e);
 880                                                                 attrValue.Value = name;
 881                                                                 attrValues.Add (attrValue);
 882                                                         }
 883                                                         pkcs12Attribute.Add (attrValues);
 884                                                         bagAttributes.Add (pkcs12Attribute);
 885                                                 }
 886                                                 break;
 887                                         case PKCS9.localKeyId:
 888                                                 ArrayList keys = (ArrayList)de.Value;
 889                                                 if (keys.Count > 0) {
 890                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
 891                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.localKeyId));
 892                                                         ASN1 attrValues = new ASN1 (0x31);
 893                                                         foreach (byte[] key in keys) {
 894                                                                 ASN1 attrValue = new ASN1 (0x04);
 895                                                                 attrValue.Value = key;
 896                                                                 attrValues.Add (attrValue);
 897                                                         }
 898                                                         pkcs12Attribute.Add (attrValues);
 899                                                         bagAttributes.Add (pkcs12Attribute);
 900                                                 }
 901                                                 break;
 902                                         default:
 903                                                 break;
 904                                         }
 905                                 }
 906
 907                                 if (bagAttributes.Count > 0) {
 908                                         safeBag.Add (bagAttributes);
 909                                 }
 910                         }
 911
 912                         return safeBag;
 913                 }
 914
 915                 private ASN1 KeyBagSafeBag (AsymmetricAlgorithm aa, IDictionary attributes)
 916                 {
 917                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo ();
 918                         if (aa is RSA) {
 919                                 pki.Algorithm = "1.2.840.113549.1.1.1";
 920                                 pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((RSA)aa);
 921                         }
 922                         else if (aa is DSA) {
 923                                 pki.Algorithm = null;
 924                                 pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((DSA)aa);
 925                         }
 926                         else
 927                                 throw new CryptographicException ("Unknown asymmetric algorithm {0}", aa.ToString ());
 928
 929                         ASN1 safeBag = new ASN1 (0x30);
 930                         safeBag.Add (ASN1Convert.FromOid (keyBag));
 931                         ASN1 bagValue = new ASN1 (0xA0);
 932                         bagValue.Add (new ASN1 (pki.GetBytes ()));
 933                         safeBag.Add (bagValue);
 934
 935                         if (attributes != null) {
 936                                 ASN1 bagAttributes = new ASN1 (0x31);
 937                                 IDictionaryEnumerator de = attributes.GetEnumerator ();
 938
 939                                 while (de.MoveNext ()) {
 940                                         string oid = (string)de.Key;
 941                                         switch (oid) {
 942                                         case PKCS9.friendlyName:
 943                                                 ArrayList names = (ArrayList)de.Value;
 944                                                 if (names.Count > 0) {
 945                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
 946                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.friendlyName));
 947                                                         ASN1 attrValues = new ASN1 (0x31);
 948                                                         foreach (byte[] name in names) {
 949                                                                 ASN1 attrValue = new ASN1 (0x1e);
 950                                                                 attrValue.Value = name;
 951                                                                 attrValues.Add (attrValue);
 952                                                         }
 953                                                         pkcs12Attribute.Add (attrValues);
 954                                                         bagAttributes.Add (pkcs12Attribute);
 955                                                 }
 956                                                 break;
 957                                         case PKCS9.localKeyId:
 958                                                 ArrayList keys = (ArrayList)de.Value;
 959                                                 if (keys.Count > 0) {
 960                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
 961                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.localKeyId));
 962                                                         ASN1 attrValues = new ASN1 (0x31);
 963                                                         foreach (byte[] key in keys) {
 964                                                                 ASN1 attrValue = new ASN1 (0x04);
 965                                                                 attrValue.Value = key;
 966                                                                 attrValues.Add (attrValue);
 967                                                         }
 968                                                         pkcs12Attribute.Add (attrValues);
 969                                                         bagAttributes.Add (pkcs12Attribute);
 970                                                 }
 971                                                 break;
 972                                         default:
 973                                                 break;
 974                                         }
 975                                 }
 976
 977                                 if (bagAttributes.Count > 0) {
 978                                         safeBag.Add (bagAttributes);
 979                                 }
 980                         }
 981
 982                         return safeBag;
 983                 }
 984
 985                 private ASN1 SecretBagSafeBag (byte[] secret, IDictionary attributes)
 986                 {
 987                         ASN1 safeBag = new ASN1 (0x30);
 988                         safeBag.Add (ASN1Convert.FromOid (secretBag));
 989                         ASN1 bagValue = new ASN1 (0x80, secret);
 990                         safeBag.Add (bagValue);
 991
 992                         if (attributes != null) {
 993                                 ASN1 bagAttributes = new ASN1 (0x31);
 994                                 IDictionaryEnumerator de = attributes.GetEnumerator ();
 995
 996                                 while (de.MoveNext ()) {
 997                                         string oid = (string)de.Key;
 998                                         switch (oid) {
 999                                         case PKCS9.friendlyName:
1000                                                 ArrayList names = (ArrayList)de.Value;
1001                                                 if (names.Count > 0) {
1002                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
1003                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.friendlyName));
1004                                                         ASN1 attrValues = new ASN1 (0x31);
1005                                                         foreach (byte[] name in names) {
1006                                                                 ASN1 attrValue = new ASN1 (0x1e);
1007                                                                 attrValue.Value = name;
1008                                                                 attrValues.Add (attrValue);
1009                                                         }
1010                                                         pkcs12Attribute.Add (attrValues);
1011                                                         bagAttributes.Add (pkcs12Attribute);
1012                                                 }
1013                                                 break;
1014                                         case PKCS9.localKeyId:
1015                                                 ArrayList keys = (ArrayList)de.Value;
1016                                                 if (keys.Count > 0) {
1017                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
1018                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.localKeyId));
1019                                                         ASN1 attrValues = new ASN1 (0x31);
1020                                                         foreach (byte[] key in keys) {
1021                                                                 ASN1 attrValue = new ASN1 (0x04);
1022                                                                 attrValue.Value = key;
1023                                                                 attrValues.Add (attrValue);
1024                                                         }
1025                                                         pkcs12Attribute.Add (attrValues);
1026                                                         bagAttributes.Add (pkcs12Attribute);
1027                                                 }
1028                                                 break;
1029                                         default:
1030                                                 break;
1031                                         }
1032                                 }
1033
1034                                 if (bagAttributes.Count > 0) {
1035                                         safeBag.Add (bagAttributes);
1036                                 }
1037                         }
1038
1039                         return safeBag;
1040                 }
1041
1042                 private ASN1 CertificateSafeBag (X509Certificate x509, IDictionary attributes)
1043                 {
1044                         ASN1 encapsulatedCertificate = new ASN1 (0x04, x509.RawData);
1045
1046                         PKCS7.ContentInfo ci = new PKCS7.ContentInfo ();
1047                         ci.ContentType = x509Certificate;
1048                         ci.Content.Add (encapsulatedCertificate);
1049
1050                         ASN1 bagValue = new ASN1 (0xA0);
1051                         bagValue.Add (ci.ASN1);
1052
1053                         ASN1 safeBag = new ASN1 (0x30);
1054                         safeBag.Add (ASN1Convert.FromOid (certBag));
1055                         safeBag.Add (bagValue);
1056
1057                         if (attributes != null) {
1058                                 ASN1 bagAttributes = new ASN1 (0x31);
1059                                 IDictionaryEnumerator de = attributes.GetEnumerator ();
1060
1061                                 while (de.MoveNext ()) {
1062                                         string oid = (string)de.Key;
1063                                         switch (oid) {
1064                                         case PKCS9.friendlyName:
1065                                                 ArrayList names = (ArrayList)de.Value;
1066                                                 if (names.Count > 0) {
1067                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
1068                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.friendlyName));
1069                                                         ASN1 attrValues = new ASN1 (0x31);
1070                                                         foreach (byte[] name in names) {
1071                                                                 ASN1 attrValue = new ASN1 (0x1e);
1072                                                                 attrValue.Value = name;
1073                                                                 attrValues.Add (attrValue);
1074                                                         }
1075                                                         pkcs12Attribute.Add (attrValues);
1076                                                         bagAttributes.Add (pkcs12Attribute);
1077                                                 }
1078                                                 break;
1079                                         case PKCS9.localKeyId:
1080                                                 ArrayList keys = (ArrayList)de.Value;
1081                                                 if (keys.Count > 0) {
1082                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
1083                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.localKeyId));
1084                                                         ASN1 attrValues = new ASN1 (0x31);
1085                                                         foreach (byte[] key in keys) {
1086                                                                 ASN1 attrValue = new ASN1 (0x04);
1087                                                                 attrValue.Value = key;
1088                                                                 attrValues.Add (attrValue);
1089                                                         }
1090                                                         pkcs12Attribute.Add (attrValues);
1091                                                         bagAttributes.Add (pkcs12Attribute);
1092                                                 }
1093                                                 break;
1094                                         default:
1095                                                 break;
1096                                         }
1097                                 }
1098
1099                                 if (bagAttributes.Count > 0) {
1100                                         safeBag.Add (bagAttributes);
1101                                 }
1102                         }
1103
1104                         return safeBag;
1105                 }
1106
1107                 private byte[] MAC (byte[] password, byte[] salt, int iterations, byte[] data)
1108                 {
1109                         PKCS12.DeriveBytes pd = new PKCS12.DeriveBytes ();
1110                         pd.HashName = "SHA1";
1111                         pd.Password = password;
1112                         pd.Salt = salt;
1113                         pd.IterationCount = iterations;
1114
1115                         HMACSHA1 hmac = (HMACSHA1) HMACSHA1.Create ();
1116                         hmac.Key = pd.DeriveMAC (20);
1117                         return hmac.ComputeHash (data, 0, data.Length);
1118                 }
1119
1120                 /*
1121                  * SafeContents ::= SEQUENCE OF SafeBag
1122                  *
1123                  * SafeBag ::= SEQUENCE {
1124                  *      bagId BAG-TYPE.&id ({PKCS12BagSet}),
1125                  *      bagValue [0] EXPLICIT BAG-TYPE.&Type({PKCS12BagSet}{@bagId}),
1126                  *      bagAttributes SET OF PKCS12Attribute OPTIONAL
1127                  * }
1128                  */
1129                 public byte[] GetBytes ()
1130                 {
1131                         // TODO (incomplete)
1132                         ASN1 safeBagSequence = new ASN1 (0x30);
1133
1134                         // Sync Safe Bag list since X509CertificateCollection may be updated
1135                         ArrayList scs = new ArrayList ();
1136                         foreach (SafeBag sb in _safeBags) {
1137                                 if (sb.BagOID.Equals (certBag)) {
1138                                         ASN1 safeBag = sb.ASN1;
1139                                         ASN1 bagValue = safeBag [1];
1140                                         PKCS7.ContentInfo cert = new PKCS7.ContentInfo (bagValue.Value);
1141                                         scs.Add (new X509Certificate (cert.Content [0].Value));
1142                                 }
1143                         }
1144
1145                         ArrayList addcerts = new ArrayList ();
1146                         ArrayList removecerts = new ArrayList ();
1147
1148                         foreach (X509Certificate c in Certificates) {
1149                                 bool found = false;
1150
1151                                 foreach (X509Certificate lc in scs) {
1152                                         if (Compare (c.RawData, lc.RawData)) {
1153                                                 found = true;
1154                                         }
1155                                 }
1156
1157                                 if (!found) {
1158                                         addcerts.Add (c);
1159                                 }
1160                         }
1161                         foreach (X509Certificate c in scs) {
1162                                 bool found = false;
1163
1164                                 foreach (X509Certificate lc in Certificates) {
1165                                         if (Compare (c.RawData, lc.RawData)) {
1166                                                 found = true;
1167                                         }
1168                                 }
1169
1170                                 if (!found) {
1171                                         removecerts.Add (c);
1172                                 }
1173                         }
1174
1175                         foreach (X509Certificate c in removecerts) {
1176                                 RemoveCertificate (c);
1177                         }
1178
1179                         foreach (X509Certificate c in addcerts) {
1180                                 AddCertificate (c);
1181                         }
1182                         // Sync done
1183
1184                         if (_safeBags.Count > 0) {
1185                                 ASN1 certsSafeBag = new ASN1 (0x30);
1186                                 foreach (SafeBag sb in _safeBags) {
1187                                         if (sb.BagOID.Equals (certBag)) {
1188                                                 certsSafeBag.Add (sb.ASN1);
1189                                         }
1190                                 }
1191
1192                                 if (certsSafeBag.Count > 0) {
1193                                         PKCS7.ContentInfo contentInfo = EncryptedContentInfo (certsSafeBag, pbeWithSHAAnd3KeyTripleDESCBC);
1194                                         safeBagSequence.Add (contentInfo.ASN1);
1195                                 }
1196                         }
1197
1198                         if (_safeBags.Count > 0) {
1199                                 ASN1 safeContents = new ASN1 (0x30);
1200                                 foreach (SafeBag sb in _safeBags) {
1201                                         if (sb.BagOID.Equals (keyBag) ||
1202                                             sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1203                                                 safeContents.Add (sb.ASN1);
1204                                         }
1205                                 }
1206                                 if (safeContents.Count > 0) {
1207                                         ASN1 content = new ASN1 (0xA0);
1208                                         content.Add (new ASN1 (0x04, safeContents.GetBytes ()));
1209
1210                                         PKCS7.ContentInfo keyBag = new PKCS7.ContentInfo (PKCS7.Oid.data);
1211                                         keyBag.Content = content;
1212                                         safeBagSequence.Add (keyBag.ASN1);
1213                                 }
1214                         }
1215
1216                         // Doing SecretBags separately in case we want to change their encryption independently.
1217                         if (_safeBags.Count > 0) {
1218                                 ASN1 secretsSafeBag = new ASN1 (0x30);
1219                                 foreach (SafeBag sb in _safeBags) {
1220                                         if (sb.BagOID.Equals (secretBag)) {
1221                                                 secretsSafeBag.Add (sb.ASN1);
1222                                         }
1223                                 }
1224
1225                                 if (secretsSafeBag.Count > 0) {
1226                                         PKCS7.ContentInfo contentInfo = EncryptedContentInfo (secretsSafeBag, pbeWithSHAAnd3KeyTripleDESCBC);
1227                                         safeBagSequence.Add (contentInfo.ASN1);
1228                                 }
1229                         }
1230
1231
1232                         ASN1 encapsulates = new ASN1 (0x04, safeBagSequence.GetBytes ());
1233                         ASN1 ci = new ASN1 (0xA0);
1234                         ci.Add (encapsulates);
1235                         PKCS7.ContentInfo authSafe = new PKCS7.ContentInfo (PKCS7.Oid.data);
1236                         authSafe.Content = ci;
1237
1238                         ASN1 macData = new ASN1 (0x30);
1239                         if (_password != null) {
1240                                 // only for password based encryption
1241                                 byte[] salt = new byte [20];
1242                                 RNG.GetBytes (salt);
1243                                 byte[] macValue = MAC (_password, salt, _iterations, authSafe.Content [0].Value);
1244                                 ASN1 oidSeq = new ASN1 (0x30);
1245                                 oidSeq.Add (ASN1Convert.FromOid ("1.3.14.3.2.26"));     // SHA1
1246                                 oidSeq.Add (new ASN1 (0x05));
1247
1248                                 ASN1 mac = new ASN1 (0x30);
1249                                 mac.Add (oidSeq);
1250                                 mac.Add (new ASN1 (0x04, macValue));
1251
1252                                 macData.Add (mac);
1253                                 macData.Add (new ASN1 (0x04, salt));
1254                                 macData.Add (ASN1Convert.FromInt32 (_iterations));
1255                         }
1256
1257                         ASN1 version = new ASN1 (0x02, new byte [1] { 0x03 });
1258
1259                         ASN1 pfx = new ASN1 (0x30);
1260                         pfx.Add (version);
1261                         pfx.Add (authSafe.ASN1);
1262                         if (macData.Count > 0) {
1263                                 // only for password based encryption
1264                                 pfx.Add (macData);
1265                         }
1266
1267                         return pfx.GetBytes ();
1268                 }
1269
1270                 // Creates an encrypted PKCS#7 ContentInfo with safeBags as its SafeContents.  Used in GetBytes(), above.
1271                 private PKCS7.ContentInfo EncryptedContentInfo(ASN1 safeBags, string algorithmOid)
1272                 {
1273                         byte[] salt = new byte [8];
1274                         RNG.GetBytes (salt);
1275
1276                         ASN1 seqParams = new ASN1 (0x30);
1277                         seqParams.Add (new ASN1 (0x04, salt));
1278                         seqParams.Add (ASN1Convert.FromInt32 (_iterations));
1279
1280                         ASN1 seqPbe = new ASN1 (0x30);
1281                         seqPbe.Add (ASN1Convert.FromOid (algorithmOid));
1282                         seqPbe.Add (seqParams);
1283
1284                         byte[] encrypted = Encrypt (algorithmOid, salt, _iterations, safeBags.GetBytes ());
1285                         ASN1 encryptedContent = new ASN1 (0x80, encrypted);
1286
1287                         ASN1 seq = new ASN1 (0x30);
1288                         seq.Add (ASN1Convert.FromOid (PKCS7.Oid.data));
1289                         seq.Add (seqPbe);
1290                         seq.Add (encryptedContent);
1291
1292                         ASN1 version = new ASN1 (0x02, new byte [1] { 0x00 });
1293                         ASN1 encData = new ASN1 (0x30);
1294                         encData.Add (version);
1295                         encData.Add (seq);
1296
1297                         ASN1 finalContent = new ASN1 (0xA0);
1298                         finalContent.Add (encData);
1299
1300                         PKCS7.ContentInfo bag = new PKCS7.ContentInfo (PKCS7.Oid.encryptedData);
1301                         bag.Content = finalContent;
1302                         return bag;
1303                 }
1304
1305                 public void AddCertificate (X509Certificate cert)
1306                 {
1307                         AddCertificate (cert, null);
1308                 }
1309
1310                 public void AddCertificate (X509Certificate cert, IDictionary attributes)
1311                 {
1312                         bool found = false;
1313
1314                         for (int i = 0; !found && i < _safeBags.Count; i++) {
1315                                 SafeBag sb = (SafeBag)_safeBags [i];
1316
1317                                 if (sb.BagOID.Equals (certBag)) {
1318                                         ASN1 safeBag = sb.ASN1;
1319                                         ASN1 bagValue = safeBag [1];
1320                                         PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value);
1321                                         X509Certificate c = new X509Certificate (crt.Content [0].Value);
1322                                         if (Compare (cert.RawData, c.RawData)) {
1323                                                 found = true;
1324                                         }
1325                                 }
1326                         }
1327
1328                         if (!found) {
1329                                 _safeBags.Add (new SafeBag (certBag, CertificateSafeBag (cert, attributes)));
1330                                 _certsChanged = true;
1331                         }
1332                 }
1333
1334                 public void RemoveCertificate (X509Certificate cert)
1335                 {
1336                         RemoveCertificate (cert, null);
1337                 }
1338
1339                 public void RemoveCertificate (X509Certificate cert, IDictionary attrs)
1340                 {
1341                         int certIndex = -1;
1342
1343                         for (int i = 0; certIndex == -1 && i < _safeBags.Count; i++) {
1344                                 SafeBag sb = (SafeBag)_safeBags [i];
1345
1346                                 if (sb.BagOID.Equals (certBag)) {
1347                                         ASN1 safeBag = sb.ASN1;
1348                                         ASN1 bagValue = safeBag [1];
1349                                         PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value);
1350                                         X509Certificate c = new X509Certificate (crt.Content [0].Value);
1351                                         if (Compare (cert.RawData, c.RawData)) {
1352                                                 if (attrs != null) {
1353                                                         if (safeBag.Count == 3) {
1354                                                                 ASN1 bagAttributes = safeBag [2];
1355                                                                 int bagAttributesFound = 0;
1356                                                                 for (int j = 0; j < bagAttributes.Count; j++) {
1357                                                                         ASN1 pkcs12Attribute = bagAttributes [j];
1358                                                                         ASN1 attrId = pkcs12Attribute [0];
1359                                                                         string ao = ASN1Convert.ToOid (attrId);
1360                                                                         ArrayList dattrValues = (ArrayList)attrs [ao];
1361
1362                                                                         if (dattrValues != null) {
1363                                                                                 ASN1 attrValues = pkcs12Attribute [1];
1364
1365                                                                                 if (dattrValues.Count == attrValues.Count) {
1366                                                                                         int attrValuesFound = 0;
1367                                                                                         for (int k = 0; k < attrValues.Count; k++) {
1368                                                                                                 ASN1 attrValue = attrValues [k];
1369                                                                                                 byte[] value = (byte[])dattrValues [k];
1370
1371                                                                                                 if (Compare (value, attrValue.Value)) {
1372                                                                                                         attrValuesFound += 1;
1373                                                                                                 }
1374                                                                                         }
1375                                                                                         if (attrValuesFound == attrValues.Count) {
1376                                                                                                 bagAttributesFound += 1;
1377                                                                                         }
1378                                                                                 }
1379                                                                         }
1380                                                                 }
1381                                                                 if (bagAttributesFound == bagAttributes.Count) {
1382                                                                         certIndex = i;
1383                                                                 }
1384                                                         }
1385                                                 } else {
1386                                                         certIndex = i;
1387                                                 }
1388                                         }
1389                                 }
1390                         }
1391
1392                         if (certIndex != -1) {
1393                                 _safeBags.RemoveAt (certIndex);
1394                                 _certsChanged = true;
1395                         }
1396                 }
1397
1398                 private bool CompareAsymmetricAlgorithm (AsymmetricAlgorithm a1, AsymmetricAlgorithm a2)
1399                 {
1400                         // fast path
1401                         if (a1.KeySize != a2.KeySize)
1402                                 return false;
1403                         // compare public keys - if they match we can assume the private match too
1404                         return (a1.ToXmlString (false) == a2.ToXmlString (false));
1405                 }
1406
1407                 public void AddPkcs8ShroudedKeyBag (AsymmetricAlgorithm aa)
1408                 {
1409                         AddPkcs8ShroudedKeyBag (aa, null);
1410                 }
1411
1412                 public void AddPkcs8ShroudedKeyBag (AsymmetricAlgorithm aa, IDictionary attributes)
1413                 {
1414                         bool found = false;
1415
1416                         for (int i = 0; !found && i < _safeBags.Count; i++) {
1417                                 SafeBag sb = (SafeBag)_safeBags [i];
1418
1419                                 if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1420                                         ASN1 bagValue = sb.ASN1 [1];
1421                                         PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
1422                                         byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
1423                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
1424                                         byte[] privateKey = pki.PrivateKey;
1425
1426                                         AsymmetricAlgorithm saa = null;
1427                                         switch (privateKey [0]) {
1428                                         case 0x02:
1429                                                 DSAParameters p = new DSAParameters (); // FIXME
1430                                                 saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1431                                                 break;
1432                                         case 0x30:
1433                                                 saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1434                                                 break;
1435                                         default:
1436                                                 Array.Clear (decrypted, 0, decrypted.Length);
1437                                                 Array.Clear (privateKey, 0, privateKey.Length);
1438                                                 throw new CryptographicException ("Unknown private key format");
1439                                         }
1440
1441                                         Array.Clear (decrypted, 0, decrypted.Length);
1442                                         Array.Clear (privateKey, 0, privateKey.Length);
1443
1444                                         if (CompareAsymmetricAlgorithm (aa , saa)) {
1445                                                 found = true;
1446                                         }
1447                                 }
1448                         }
1449
1450                         if (!found) {
1451                                 _safeBags.Add (new SafeBag (pkcs8ShroudedKeyBag, Pkcs8ShroudedKeyBagSafeBag (aa, attributes)));
1452                                 _keyBagsChanged = true;
1453                         }
1454                 }
1455
1456                 public void RemovePkcs8ShroudedKeyBag (AsymmetricAlgorithm aa)
1457                 {
1458                         int aaIndex = -1;
1459
1460                         for (int i = 0; aaIndex == -1 && i < _safeBags.Count; i++) {
1461                                 SafeBag sb = (SafeBag)_safeBags [i];
1462
1463                                 if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1464                                         ASN1 bagValue = sb.ASN1 [1];
1465                                         PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
1466                                         byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
1467                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
1468                                         byte[] privateKey = pki.PrivateKey;
1469
1470                                         AsymmetricAlgorithm saa = null;
1471                                         switch (privateKey [0]) {
1472                                         case 0x02:
1473                                                 DSAParameters p = new DSAParameters (); // FIXME
1474                                                 saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1475                                                 break;
1476                                         case 0x30:
1477                                                 saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1478                                                 break;
1479                                         default:
1480                                                 Array.Clear (decrypted, 0, decrypted.Length);
1481                                                 Array.Clear (privateKey, 0, privateKey.Length);
1482                                                 throw new CryptographicException ("Unknown private key format");
1483                                         }
1484
1485                                         Array.Clear (decrypted, 0, decrypted.Length);
1486                                         Array.Clear (privateKey, 0, privateKey.Length);
1487
1488                                         if (CompareAsymmetricAlgorithm (aa, saa)) {
1489                                                 aaIndex = i;
1490                                         }
1491                                 }
1492                         }
1493
1494                         if (aaIndex != -1) {
1495                                 _safeBags.RemoveAt (aaIndex);
1496                                 _keyBagsChanged = true;
1497                         }
1498                 }
1499
1500                 public void AddKeyBag (AsymmetricAlgorithm aa)
1501                 {
1502                         AddKeyBag (aa, null);
1503                 }
1504
1505                 public void AddKeyBag (AsymmetricAlgorithm aa, IDictionary attributes)
1506                 {
1507                         bool found = false;
1508
1509                         for (int i = 0; !found && i < _safeBags.Count; i++) {
1510                                 SafeBag sb = (SafeBag)_safeBags [i];
1511
1512                                 if (sb.BagOID.Equals (keyBag)) {
1513                                         ASN1 bagValue = sb.ASN1 [1];
1514                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
1515                                         byte[] privateKey = pki.PrivateKey;
1516
1517                                         AsymmetricAlgorithm saa = null;
1518                                         switch (privateKey [0]) {
1519                                         case 0x02:
1520                                                 DSAParameters p = new DSAParameters (); // FIXME
1521                                                 saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1522                                                 break;
1523                                         case 0x30:
1524                                                 saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1525                                                 break;
1526                                         default:
1527                                                 Array.Clear (privateKey, 0, privateKey.Length);
1528                                                 throw new CryptographicException ("Unknown private key format");
1529                                         }
1530
1531                                         Array.Clear (privateKey, 0, privateKey.Length);
1532
1533                                         if (CompareAsymmetricAlgorithm (aa, saa)) {
1534                                                 found = true;
1535                                         }
1536                                 }
1537                         }
1538
1539                         if (!found) {
1540                                 _safeBags.Add (new SafeBag (keyBag, KeyBagSafeBag (aa, attributes)));
1541                                 _keyBagsChanged = true;
1542                         }
1543                 }
1544
1545                 public void RemoveKeyBag (AsymmetricAlgorithm aa)
1546                 {
1547                         int aaIndex = -1;
1548
1549                         for (int i = 0; aaIndex == -1 && i < _safeBags.Count; i++) {
1550                                 SafeBag sb = (SafeBag)_safeBags [i];
1551
1552                                 if (sb.BagOID.Equals (keyBag)) {
1553                                         ASN1 bagValue = sb.ASN1 [1];
1554                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
1555                                         byte[] privateKey = pki.PrivateKey;
1556
1557                                         AsymmetricAlgorithm saa = null;
1558                                         switch (privateKey [0]) {
1559                                         case 0x02:
1560                                                 DSAParameters p = new DSAParameters (); // FIXME
1561                                                 saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1562                                                 break;
1563                                         case 0x30:
1564                                                 saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1565                                                 break;
1566                                         default:
1567                                                 Array.Clear (privateKey, 0, privateKey.Length);
1568                                                 throw new CryptographicException ("Unknown private key format");
1569                                         }
1570
1571                                         Array.Clear (privateKey, 0, privateKey.Length);
1572
1573                                         if (CompareAsymmetricAlgorithm (aa, saa)) {
1574                                                 aaIndex = i;
1575                                         }
1576                                 }
1577                         }
1578
1579                         if (aaIndex != -1) {
1580                                 _safeBags.RemoveAt (aaIndex);
1581                                 _keyBagsChanged = true;
1582                         }
1583                 }
1584
1585                 public void AddSecretBag (byte[] secret)
1586                 {
1587                         AddSecretBag (secret, null);
1588                 }
1589
1590                 public void AddSecretBag (byte[] secret, IDictionary attributes)
1591                 {
1592                         bool found = false;
1593
1594                         for (int i = 0; !found && i < _safeBags.Count; i++) {
1595                                 SafeBag sb = (SafeBag)_safeBags [i];
1596
1597                                 if (sb.BagOID.Equals (secretBag)) {
1598                                         ASN1 bagValue = sb.ASN1 [1];
1599                                         byte[] ssecret = bagValue.Value;
1600
1601                                         if (Compare (secret, ssecret)) {
1602                                                 found = true;
1603                                         }
1604                                 }
1605                         }
1606
1607                         if (!found) {
1608                                 _safeBags.Add (new SafeBag (secretBag, SecretBagSafeBag (secret, attributes)));
1609                                 _secretBagsChanged = true;
1610                         }
1611                 }
1612
1613                 public void RemoveSecretBag (byte[] secret)
1614                 {
1615                         int sIndex = -1;
1616
1617                         for (int i = 0; sIndex == -1 && i < _safeBags.Count; i++) {
1618                                 SafeBag sb = (SafeBag)_safeBags [i];
1619
1620                                 if (sb.BagOID.Equals (secretBag)) {
1621                                         ASN1 bagValue = sb.ASN1 [1];
1622                                         byte[] ssecret = bagValue.Value;
1623
1624                                         if (Compare (secret, ssecret)) {
1625                                                 sIndex = i;
1626                                         }
1627                                 }
1628                         }
1629
1630                         if (sIndex != -1) {
1631                                 _safeBags.RemoveAt (sIndex);
1632                                 _secretBagsChanged = true;
1633                         }
1634                 }
1635
1636                 public AsymmetricAlgorithm GetAsymmetricAlgorithm (IDictionary attrs)
1637                 {
1638                         foreach (SafeBag sb in _safeBags) {
1639                                 if (sb.BagOID.Equals (keyBag) || sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1640                                         ASN1 safeBag = sb.ASN1;
1641
1642                                         if (safeBag.Count == 3) {
1643                                                 ASN1 bagAttributes = safeBag [2];
1644
1645                                                 int bagAttributesFound = 0;
1646                                                 for (int i = 0; i < bagAttributes.Count; i++) {
1647                                                         ASN1 pkcs12Attribute = bagAttributes [i];
1648                                                         ASN1 attrId = pkcs12Attribute [0];
1649                                                         string ao = ASN1Convert.ToOid (attrId);
1650                                                         ArrayList dattrValues = (ArrayList)attrs [ao];
1651
1652                                                         if (dattrValues != null) {
1653                                                                 ASN1 attrValues = pkcs12Attribute [1];
1654
1655                                                                 if (dattrValues.Count == attrValues.Count) {
1656                                                                         int attrValuesFound = 0;
1657                                                                         for (int j = 0; j < attrValues.Count; j++) {
1658                                                                                 ASN1 attrValue = attrValues [j];
1659                                                                                 byte[] value = (byte[])dattrValues [j];
1660
1661                                                                                 if (Compare (value, attrValue.Value)) {
1662                                                                                         attrValuesFound += 1;
1663                                                                                 }
1664                                                                         }
1665                                                                         if (attrValuesFound == attrValues.Count) {
1666                                                                                 bagAttributesFound += 1;
1667                                                                         }
1668                                                                 }
1669                                                         }
1670                                                 }
1671                                                 if (bagAttributesFound == bagAttributes.Count) {
1672                                                         ASN1 bagValue = safeBag [1];
1673                                                         AsymmetricAlgorithm aa = null;
1674                                                         if (sb.BagOID.Equals (keyBag)) {
1675                                                                 PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
1676                                                                 byte[] privateKey = pki.PrivateKey;
1677                                                                 switch (privateKey [0]) {
1678                                                                 case 0x02:
1679                                                                         DSAParameters p = new DSAParameters (); // FIXME
1680                                                                         aa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1681                                                                         break;
1682                                                                 case 0x30:
1683                                                                         aa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1684                                                                         break;
1685                                                                 default:
1686                                                                         break;
1687                                                                 }
1688                                                                 Array.Clear (privateKey, 0, privateKey.Length);
1689                                                         } else if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1690                                                                 PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
1691                                                                 byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
1692                                                                 PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
1693                                                                 byte[] privateKey = pki.PrivateKey;
1694                                                                 switch (privateKey [0]) {
1695                                                                 case 0x02:
1696                                                                         DSAParameters p = new DSAParameters (); // FIXME
1697                                                                         aa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1698                                                                         break;
1699                                                                 case 0x30:
1700                                                                         aa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1701                                                                         break;
1702                                                                 default:
1703                                                                         break;
1704                                                                 }
1705                                                                 Array.Clear (privateKey, 0, privateKey.Length);
1706                                                                 Array.Clear (decrypted, 0, decrypted.Length);
1707                                                         }
1708                                                         return aa;
1709                                                 }
1710                                         }
1711                                 }
1712                         }
1713
1714                         return null;
1715                 }
1716
1717                 public byte[] GetSecret (IDictionary attrs)
1718                 {
1719                         foreach (SafeBag sb in _safeBags) {
1720                                 if (sb.BagOID.Equals (secretBag)) {
1721                                         ASN1 safeBag = sb.ASN1;
1722
1723                                         if (safeBag.Count == 3) {
1724                                                 ASN1 bagAttributes = safeBag [2];
1725
1726                                                 int bagAttributesFound = 0;
1727                                                 for (int i = 0; i < bagAttributes.Count; i++) {
1728                                                         ASN1 pkcs12Attribute = bagAttributes [i];
1729                                                         ASN1 attrId = pkcs12Attribute [0];
1730                                                         string ao = ASN1Convert.ToOid (attrId);
1731                                                         ArrayList dattrValues = (ArrayList)attrs [ao];
1732
1733                                                         if (dattrValues != null) {
1734                                                                 ASN1 attrValues = pkcs12Attribute [1];
1735
1736                                                                 if (dattrValues.Count == attrValues.Count) {
1737                                                                         int attrValuesFound = 0;
1738                                                                         for (int j = 0; j < attrValues.Count; j++) {
1739                                                                                 ASN1 attrValue = attrValues [j];
1740                                                                                 byte[] value = (byte[])dattrValues [j];
1741
1742                                                                                 if (Compare (value, attrValue.Value)) {
1743                                                                                         attrValuesFound += 1;
1744                                                                                 }
1745                                                                         }
1746                                                                         if (attrValuesFound == attrValues.Count) {
1747                                                                                 bagAttributesFound += 1;
1748                                                                         }
1749                                                                 }
1750                                                         }
1751                                                 }
1752                                                 if (bagAttributesFound == bagAttributes.Count) {
1753                                                         ASN1 bagValue = safeBag [1];
1754                                                         return bagValue.Value;
1755                                                 }
1756                                         }
1757                                 }
1758                         }
1759
1760                         return null;
1761                 }
1762
1763                 public X509Certificate GetCertificate (IDictionary attrs)
1764                 {
1765                         foreach (SafeBag sb in _safeBags) {
1766                                 if (sb.BagOID.Equals (certBag)) {
1767                                         ASN1 safeBag = sb.ASN1;
1768
1769                                         if (safeBag.Count == 3) {
1770                                                 ASN1 bagAttributes = safeBag [2];
1771
1772                                                 int bagAttributesFound = 0;
1773                                                 for (int i = 0; i < bagAttributes.Count; i++) {
1774                                                         ASN1 pkcs12Attribute = bagAttributes [i];
1775                                                         ASN1 attrId = pkcs12Attribute [0];
1776                                                         string ao = ASN1Convert.ToOid (attrId);
1777                                                         ArrayList dattrValues = (ArrayList)attrs [ao];
1778
1779                                                         if (dattrValues != null) {
1780                                                                 ASN1 attrValues = pkcs12Attribute [1];
1781
1782                                                                 if (dattrValues.Count == attrValues.Count) {
1783                                                                         int attrValuesFound = 0;
1784                                                                         for (int j = 0; j < attrValues.Count; j++) {
1785                                                                                 ASN1 attrValue = attrValues [j];
1786                                                                                 byte[] value = (byte[])dattrValues [j];
1787
1788                                                                                 if (Compare (value, attrValue.Value)) {
1789                                                                                         attrValuesFound += 1;
1790                                                                                 }
1791                                                                         }
1792                                                                         if (attrValuesFound == attrValues.Count) {
1793                                                                                 bagAttributesFound += 1;
1794                                                                         }
1795                                                                 }
1796                                                         }
1797                                                 }
1798                                                 if (bagAttributesFound == bagAttributes.Count) {
1799                                                         ASN1 bagValue = safeBag [1];
1800                                                         PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value);
1801                                                         return new X509Certificate (crt.Content [0].Value);
1802                                                 }
1803                                         }
1804                                 }
1805                         }
1806
1807                         return null;
1808                 }
1809
1810                 public IDictionary GetAttributes (AsymmetricAlgorithm aa)
1811                 {
1812                         IDictionary result = new Hashtable ();
1813
1814                         foreach (SafeBag sb in _safeBags) {
1815                                 if (sb.BagOID.Equals (keyBag) || sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1816                                         ASN1 safeBag = sb.ASN1;
1817
1818                                         ASN1 bagValue = safeBag [1];
1819                                         AsymmetricAlgorithm saa = null;
1820                                         if (sb.BagOID.Equals (keyBag)) {
1821                                                 PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
1822                                                 byte[] privateKey = pki.PrivateKey;
1823                                                 switch (privateKey [0]) {
1824                                                 case 0x02:
1825                                                         DSAParameters p = new DSAParameters (); // FIXME
1826                                                         saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1827                                                         break;
1828                                                 case 0x30:
1829                                                         saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1830                                                         break;
1831                                                 default:
1832                                                         break;
1833                                                 }
1834                                                 Array.Clear (privateKey, 0, privateKey.Length);
1835                                         } else if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1836                                                 PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
1837                                                 byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
1838                                                 PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
1839                                                 byte[] privateKey = pki.PrivateKey;
1840                                                 switch (privateKey [0]) {
1841                                                 case 0x02:
1842                                                         DSAParameters p = new DSAParameters (); // FIXME
1843                                                         saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1844                                                         break;
1845                                                 case 0x30:
1846                                                         saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1847                                                         break;
1848                                                 default:
1849                                                         break;
1850                                                 }
1851                                                 Array.Clear (privateKey, 0, privateKey.Length);
1852                                                 Array.Clear (decrypted, 0, decrypted.Length);
1853                                         }
1854
1855                                         if (saa != null && CompareAsymmetricAlgorithm (saa, aa)) {
1856                                                 if (safeBag.Count == 3) {
1857                                                         ASN1 bagAttributes = safeBag [2];
1858
1859                                                         for (int i = 0; i < bagAttributes.Count; i++) {
1860                                                                 ASN1 pkcs12Attribute = bagAttributes [i];
1861                                                                 ASN1 attrId = pkcs12Attribute [0];
1862                                                                 string aOid = ASN1Convert.ToOid (attrId);
1863                                                                 ArrayList aValues = new ArrayList ();
1864
1865                                                                 ASN1 attrValues = pkcs12Attribute [1];
1866
1867                                                                 for (int j = 0; j < attrValues.Count; j++) {
1868                                                                         ASN1 attrValue = attrValues [j];
1869                                                                         aValues.Add (attrValue.Value);
1870                                                                 }
1871                                                                 result.Add (aOid, aValues);
1872                                                         }
1873                                                 }
1874                                         }
1875                                 }
1876                         }
1877
1878                         return result;
1879                 }
1880
1881                 public IDictionary GetAttributes (X509Certificate cert)
1882                 {
1883                         IDictionary result = new Hashtable ();
1884
1885                         foreach (SafeBag sb in _safeBags) {
1886                                 if (sb.BagOID.Equals (certBag)) {
1887                                         ASN1 safeBag = sb.ASN1;
1888                                         ASN1 bagValue = safeBag [1];
1889                                         PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value);
1890                                         X509Certificate xc = new X509Certificate (crt.Content [0].Value);
1891
1892                                         if (Compare (cert.RawData, xc.RawData)) {
1893                                                 if (safeBag.Count == 3) {
1894                                                         ASN1 bagAttributes = safeBag [2];
1895
1896                                                         for (int i = 0; i < bagAttributes.Count; i++) {
1897                                                                 ASN1 pkcs12Attribute = bagAttributes [i];
1898                                                                 ASN1 attrId = pkcs12Attribute [0];
1899
1900                                                                 string aOid = ASN1Convert.ToOid (attrId);
1901                                                                 ArrayList aValues = new ArrayList ();
1902
1903                                                                 ASN1 attrValues = pkcs12Attribute [1];
1904
1905                                                                 for (int j = 0; j < attrValues.Count; j++) {
1906                                                                         ASN1 attrValue = attrValues [j];
1907                                                                         aValues.Add (attrValue.Value);
1908                                                                 }
1909                                                                 result.Add (aOid, aValues);
1910                                                         }
1911                                                 }
1912                                         }
1913                                 }
1914                         }
1915
1916                         return result;
1917                 }
1918
1919                 public void SaveToFile (string filename)
1920                 {
1921                         if (filename == null)
1922                                 throw new ArgumentNullException ("filename");
1923
1924                         using (FileStream fs = File.Create (filename)) {
1925                                 byte[] data = GetBytes ();
1926                                 fs.Write (data, 0, data.Length);
1927                         }
1928                 }
1929
1930                 public object Clone ()
1931                 {
1932                         PKCS12 clone = null;
1933                         if (_password != null) {
1934                                 clone = new PKCS12 (GetBytes (), Encoding.BigEndianUnicode.GetString (_password));
1935                         } else {
1936                                 clone = new PKCS12 (GetBytes ());
1937                         }
1938                         clone.IterationCount = this.IterationCount;
1939
1940                         return clone;
1941                 }
1942
1943                 // static
1944
1945                 public const int CryptoApiPasswordLimit = 32;
1946
1947                 static private int password_max_length = Int32.MaxValue;
1948
1949                 // static properties
1950
1951                 // MS CryptoAPI limits the password to a maximum of 31 characters
1952                 // other implementations, like OpenSSL, have no such limitation.
1953                 // Setting a maximum value will truncate the password length to
1954                 // ensure compatibility with MS's PFXImportCertStore API.
1955                 static public int MaximumPasswordLength {
1956                         get { return password_max_length; }
1957                         set {
1958                                 if (value < CryptoApiPasswordLimit) {
1959                                         string msg = Locale.GetText ("Maximum password length cannot be less than {0}.", CryptoApiPasswordLimit);
1960                                         throw new ArgumentOutOfRangeException (msg);
1961                                 }
1962                                 password_max_length = value;
1963                         }
1964                 }
1965
1966                 // static methods
1967
1968                 static private byte[] LoadFile (string filename)
1969                 {
1970                         byte[] data = null;
1971                         using (FileStream fs = File.OpenRead (filename)) {
1972                                 data = new byte [fs.Length];
1973                                 fs.Read (data, 0, data.Length);
1974                                 fs.Close ();
1975                         }
1976                         return data;
1977                 }
1978
1979                 static public PKCS12 LoadFromFile (string filename)
1980                 {
1981                         if (filename == null)
1982                                 throw new ArgumentNullException ("filename");
1983
1984                         return new PKCS12 (LoadFile (filename));
1985                 }
1986
1987                 static public PKCS12 LoadFromFile (string filename, string password)
1988                 {
1989                         if (filename == null)
1990                                 throw new ArgumentNullException ("filename");
1991
1992                         return new PKCS12 (LoadFile (filename), password);
1993                 }
1994         }
1995 }