1 files changed, 96 insertions, 0 deletions
diff --git a/crypto/src/asn1/esf/SignerAttribute.cs b/crypto/src/asn1/esf/SignerAttribute.cs
new file mode 100644
index 000000000..ddee53c69
--- /dev/null
+++ b/crypto/src/asn1/esf/SignerAttribute.cs
@@ -0,0 +1,96 @@
+using System;
+
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Esf
+{
+	public class SignerAttribute
+		: Asn1Encodable
+	{
+		private Asn1Sequence			claimedAttributes;
+		private AttributeCertificate	certifiedAttributes;
+
+		public static SignerAttribute GetInstance(
+			object obj)
+		{
+			if (obj == null || obj is SignerAttribute)
+				return (SignerAttribute) obj;
+
+			if (obj is Asn1Sequence)
+				return new SignerAttribute(obj);
+
+			throw new ArgumentException(
+				"Unknown object in 'SignerAttribute' factory: "
+				+ obj.GetType().Name,
+				"obj");
+		}
+
+		private SignerAttribute(
+			object obj)
+		{
+			Asn1Sequence seq = (Asn1Sequence) obj;
+			DerTaggedObject taggedObject = (DerTaggedObject) seq[0];
+			if (taggedObject.TagNo == 0)
+			{
+				claimedAttributes = Asn1Sequence.GetInstance(taggedObject, true);
+			}
+			else if (taggedObject.TagNo == 1)
+			{
+				certifiedAttributes = AttributeCertificate.GetInstance(taggedObject);
+			}
+			else
+			{
+				throw new ArgumentException("illegal tag.", "obj");
+			}
+		}
+
+		public SignerAttribute(
+			Asn1Sequence claimedAttributes)
+		{
+			this.claimedAttributes = claimedAttributes;
+		}
+
+		public SignerAttribute(
+			AttributeCertificate certifiedAttributes)
+		{
+			this.certifiedAttributes = certifiedAttributes;
+		}
+
+		public virtual Asn1Sequence ClaimedAttributes
+		{
+			get { return claimedAttributes; }
+		}
+
+		public virtual AttributeCertificate CertifiedAttributes
+		{
+			get { return certifiedAttributes; }
+		}
+
+		/**
+		*
+		* <pre>
+		*  SignerAttribute ::= SEQUENCE OF CHOICE {
+		*      claimedAttributes   [0] ClaimedAttributes,
+		*      certifiedAttributes [1] CertifiedAttributes }
+		*
+		*  ClaimedAttributes ::= SEQUENCE OF Attribute
+		*  CertifiedAttributes ::= AttributeCertificate -- as defined in RFC 3281: see clause 4.1.
+		* </pre>
+		*/
+		public override Asn1Object ToAsn1Object()
+		{
+			Asn1EncodableVector v = new Asn1EncodableVector();
+
+			if (claimedAttributes != null)
+			{
+				v.Add(new DerTaggedObject(0, claimedAttributes));
+			}
+			else
+			{
+				v.Add(new DerTaggedObject(1, certifiedAttributes));
+			}
+
+			return new DerSequence(v);
+		}
+	}
+}