summary refs log tree commit diff
path: root/crypto/src/x509/AttributeCertificateHolder.cs
blob: 8ea90c24d8b7d5a3ed0f01d590487983832c9f36 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
using System;
using System.Collections;

using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Security.Certificates;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.X509.Store;

namespace Org.BouncyCastle.X509
{
	/// <remarks>
	/// The Holder object.
	/// <pre>
 	/// Holder ::= SEQUENCE {
 	///		baseCertificateID   [0] IssuerSerial OPTIONAL,
 	///			-- the issuer and serial number of
 	///			-- the holder's Public Key Certificate
 	///		entityName          [1] GeneralNames OPTIONAL,
 	///			-- the name of the claimant or role
 	///		objectDigestInfo    [2] ObjectDigestInfo OPTIONAL
 	///			-- used to directly authenticate the holder,
 	///			-- for example, an executable
 	/// }
	/// </pre>
	/// </remarks>
	public class AttributeCertificateHolder
		//: CertSelector, Selector
		: IX509Selector
	{
		internal readonly Holder holder;

		internal AttributeCertificateHolder(
			Asn1Sequence seq)
		{
			holder = Holder.GetInstance(seq);
		}

		public AttributeCertificateHolder(
			X509Name	issuerName,
			BigInteger	serialNumber)
		{
			holder = new Holder(
				new IssuerSerial(
					GenerateGeneralNames(issuerName),
					new DerInteger(serialNumber)));
		}

		public AttributeCertificateHolder(
			X509Certificate	cert)
		{
			X509Name name;
			try
			{
				name = PrincipalUtilities.GetIssuerX509Principal(cert);
			}
			catch (Exception e)
			{
				throw new CertificateParsingException(e.Message);
			}

			holder = new Holder(new IssuerSerial(GenerateGeneralNames(name), new DerInteger(cert.SerialNumber)));
		}

		public AttributeCertificateHolder(
			X509Name principal)
		{
			holder = new Holder(GenerateGeneralNames(principal));
		}

		/**
		 * Constructs a holder for v2 attribute certificates with a hash value for
		 * some type of object.
		 * <p>
		 * <code>digestedObjectType</code> can be one of the following:
		 * <ul>
		 * <li>0 - publicKey - A hash of the public key of the holder must be
		 * passed.</li>
		 * <li>1 - publicKeyCert - A hash of the public key certificate of the
		 * holder must be passed.</li>
		 * <li>2 - otherObjectDigest - A hash of some other object type must be
		 * passed. <code>otherObjectTypeID</code> must not be empty.</li>
		 * </ul>
		 * </p>
		 * <p>This cannot be used if a v1 attribute certificate is used.</p>
		 *
		 * @param digestedObjectType The digest object type.
		 * @param digestAlgorithm The algorithm identifier for the hash.
		 * @param otherObjectTypeID The object type ID if
		 *            <code>digestedObjectType</code> is
		 *            <code>otherObjectDigest</code>.
		 * @param objectDigest The hash value.
		 */
		public AttributeCertificateHolder(
			int		digestedObjectType,
			string	digestAlgorithm,
			string	otherObjectTypeID,
			byte[]	objectDigest)
		{
			// TODO Allow 'objectDigest' to be null?

			holder = new Holder(new ObjectDigestInfo(digestedObjectType, otherObjectTypeID,
				new AlgorithmIdentifier(new DerObjectIdentifier(digestAlgorithm)), Arrays.Clone(objectDigest)));
		}

		/**
		 * Returns the digest object type if an object digest info is used.
		 * <p>
		 * <ul>
		 * <li>0 - publicKey - A hash of the public key of the holder must be
		 * passed.</li>
		 * <li>1 - publicKeyCert - A hash of the public key certificate of the
		 * holder must be passed.</li>
		 * <li>2 - otherObjectDigest - A hash of some other object type must be
		 * passed. <code>otherObjectTypeID</code> must not be empty.</li>
		 * </ul>
		 * </p>
		 *
		 * @return The digest object type or -1 if no object digest info is set.
		 */
		public int DigestedObjectType
		{
			get
			{
				ObjectDigestInfo odi = holder.ObjectDigestInfo;

				return odi == null
					?   -1
                    :   odi.DigestedObjectType.IntValueExact;
			}
		}

		/**
		 * Returns the other object type ID if an object digest info is used.
		 *
		 * @return The other object type ID or <code>null</code> if no object
		 *         digest info is set.
		 */
		public string DigestAlgorithm
		{
			get
			{
				ObjectDigestInfo odi = holder.ObjectDigestInfo;

				return odi == null
					?	null
					:	odi.DigestAlgorithm.Algorithm.Id;
			}
		}

		/**
		 * Returns the hash if an object digest info is used.
		 *
		 * @return The hash or <code>null</code> if no object digest info is set.
		 */
		public byte[] GetObjectDigest()
		{
			ObjectDigestInfo odi = holder.ObjectDigestInfo;

			return odi == null
				?	null
				:	odi.ObjectDigest.GetBytes();
		}

		/**
		 * Returns the digest algorithm ID if an object digest info is used.
		 *
		 * @return The digest algorithm ID or <code>null</code> if no object
		 *         digest info is set.
		 */
		public string OtherObjectTypeID
		{
			get
			{
				ObjectDigestInfo odi = holder.ObjectDigestInfo;

				return odi == null
					?	null
					:	odi.OtherObjectTypeID.Id;
			}
		}

		private GeneralNames GenerateGeneralNames(
			X509Name principal)
		{
//			return GeneralNames.GetInstance(new DerSequence(new GeneralName(principal)));
			return new GeneralNames(new GeneralName(principal));
		}

		private bool MatchesDN(
			X509Name		subject,
			GeneralNames	targets)
		{
			GeneralName[] names = targets.GetNames();

			for (int i = 0; i != names.Length; i++)
			{
				GeneralName gn = names[i];

				if (gn.TagNo == GeneralName.DirectoryName)
				{
					try
					{
						if (X509Name.GetInstance(gn.Name).Equivalent(subject))
						{
							return true;
						}
					}
					catch (Exception)
					{
					}
				}
			}

			return false;
		}

		private object[] GetNames(
			GeneralName[] names)
		{
            int count = 0;
            for (int i = 0; i != names.Length; i++)
            {
                if (names[i].TagNo == GeneralName.DirectoryName)
                {
                    ++count;
                }
            }

            object[] result = new object[count];

            int pos = 0;
            for (int i = 0; i != names.Length; i++)
            {
                if (names[i].TagNo == GeneralName.DirectoryName)
                {
                    result[pos++] = X509Name.GetInstance(names[i].Name);
                }
            }

            return result;
        }

		private X509Name[] GetPrincipals(
			GeneralNames names)
		{
			object[] p = this.GetNames(names.GetNames());

            int count = 0;

            for (int i = 0; i != p.Length; i++)
			{
				if (p[i] is X509Name)
				{
                    ++count;
				}
			}

            X509Name[] result = new X509Name[count];

            int pos = 0;
            for (int i = 0; i != p.Length; i++)
            {
                if (p[i] is X509Name)
                {
                    result[pos++] = (X509Name)p[i];
                }
            }

            return result;
        }

		/**
		 * Return any principal objects inside the attribute certificate holder entity names field.
		 *
		 * @return an array of IPrincipal objects (usually X509Name), null if no entity names field is set.
		 */
		public X509Name[] GetEntityNames()
		{
			if (holder.EntityName != null)
			{
				return GetPrincipals(holder.EntityName);
			}

			return null;
		}

		/**
		 * Return the principals associated with the issuer attached to this holder
		 *
		 * @return an array of principals, null if no BaseCertificateID is set.
		 */
		public X509Name[] GetIssuer()
		{
			if (holder.BaseCertificateID != null)
			{
				return GetPrincipals(holder.BaseCertificateID.Issuer);
			}

			return null;
		}

		/**
		 * Return the serial number associated with the issuer attached to this holder.
		 *
		 * @return the certificate serial number, null if no BaseCertificateID is set.
		 */
		public BigInteger SerialNumber
		{
			get
			{
				if (holder.BaseCertificateID != null)
				{
					return holder.BaseCertificateID.Serial.Value;
				}

				return null;
			}
		}

		public object Clone()
		{
			return new AttributeCertificateHolder((Asn1Sequence)holder.ToAsn1Object());
		}

		public bool Match(
//			Certificate cert)
			X509Certificate x509Cert)
		{
//			if (!(cert is X509Certificate))
//			{
//				return false;
//			}
//
//			X509Certificate x509Cert = (X509Certificate)cert;

			try
			{
				if (holder.BaseCertificateID != null)
				{
					return holder.BaseCertificateID.Serial.Value.Equals(x509Cert.SerialNumber)
						&& MatchesDN(PrincipalUtilities.GetIssuerX509Principal(x509Cert), holder.BaseCertificateID.Issuer);
				}

				if (holder.EntityName != null)
				{
					if (MatchesDN(PrincipalUtilities.GetSubjectX509Principal(x509Cert), holder.EntityName))
					{
						return true;
					}
				}

				if (holder.ObjectDigestInfo != null)
				{
					IDigest md = null;
					try
					{
						md = DigestUtilities.GetDigest(DigestAlgorithm);
					}
					catch (Exception)
					{
						return false;
					}

					switch (DigestedObjectType)
					{
						case ObjectDigestInfo.PublicKey:
						{
							// TODO: DSA Dss-parms

							//byte[] b = x509Cert.GetPublicKey().getEncoded();
							// TODO Is this the right way to encode?
							byte[] b = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(
								x509Cert.GetPublicKey()).GetEncoded();
							md.BlockUpdate(b, 0, b.Length);
							break;
						}

						case ObjectDigestInfo.PublicKeyCert:
						{
							byte[] b = x509Cert.GetEncoded();
							md.BlockUpdate(b, 0, b.Length);
							break;
						}

						// TODO Default handler?
					}

					// TODO Shouldn't this be the other way around?
					if (!Arrays.AreEqual(DigestUtilities.DoFinal(md), GetObjectDigest()))
					{
						return false;
					}
				}
			}
			catch (CertificateEncodingException)
			{
				return false;
			}

			return false;
		}

		public override bool Equals(
			object obj)
		{
			if (obj == this)
			{
				return true;
			}

			if (!(obj is AttributeCertificateHolder))
			{
				return false;
			}

			AttributeCertificateHolder other = (AttributeCertificateHolder)obj;

			return this.holder.Equals(other.holder);
		}

		public override int GetHashCode()
		{
			return this.holder.GetHashCode();
		}

		public bool Match(
			object obj)
		{
			if (!(obj is X509Certificate))
			{
				return false;
			}

//			return Match((Certificate)obj);
			return Match((X509Certificate)obj);
		}
	}
}