Inheritance: Asn1Encodable
		internal static void PrepareNextCertG(
			PkixCertPath				certPath,
			int							index,
			PkixNameConstraintValidator	nameConstraintValidator)
			//throws CertPathValidatorException
		{
			IList certs = certPath.Certificates;
			X509Certificate cert = (X509Certificate)certs[index];

			//
			// (g) handle the name constraints extension
			//
			NameConstraints nc = null;
			try
			{
				Asn1Sequence ncSeq = DerSequence.GetInstance(
					PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.NameConstraints));
				if (ncSeq != null)
				{
					nc = new NameConstraints(ncSeq);
				}
			}
			catch (Exception e)
			{
				throw new PkixCertPathValidatorException(
					"Name constraints extension could not be decoded.", e, certPath, index);
			}
			if (nc != null)
			{
				//
				// (g) (1) permitted subtrees
				//
				Asn1Sequence permitted = nc.PermittedSubtrees;
				if (permitted != null)
				{
					try
					{
						nameConstraintValidator.IntersectPermittedSubtree(permitted);
					}
					catch (Exception ex)
					{
						throw new PkixCertPathValidatorException(
							"Permitted subtrees cannot be build from name constraints extension.", ex, certPath, index);
					}
				}

				//
				// (g) (2) excluded subtrees
				//
				Asn1Sequence excluded = nc.ExcludedSubtrees;
				if (excluded != null)
				{
					IEnumerator e = excluded.GetEnumerator();
					try
					{
						while (e.MoveNext())
						{
							GeneralSubtree subtree = GeneralSubtree.GetInstance(e.Current);
							nameConstraintValidator.AddExcludedSubtree(subtree);
						}
					}
					catch (Exception ex)
					{
						throw new PkixCertPathValidatorException(
							"Excluded subtrees cannot be build from name constraints extension.", ex, certPath, index);
					}
				}
			}
		}
Esempio n. 2
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		/// <summary>
		/// Decode the name constraints and clone them if not null.
		/// </summary>
		private void setNameConstraints(
			byte[] bytes) 
		{
			if (bytes == null) 
			{
				ncBytes = null;
				nc = null;
			} 
			else 
			{
				ncBytes = (byte[]) bytes.Clone();
				// validate DER encoding
				//nc = new NameConstraintsExtension(Boolean.FALSE, bytes);
				nc = NameConstraints.GetInstance(Asn1Object.FromByteArray(bytes));
			}
		}