1 files changed, 88 insertions, 0 deletions
diff --git a/crypto/src/asn1/esf/OtherHash.cs b/crypto/src/asn1/esf/OtherHash.cs
new file mode 100644
index 000000000..2ee162478
--- /dev/null
+++ b/crypto/src/asn1/esf/OtherHash.cs
@@ -0,0 +1,88 @@
+using System;
+
+using Org.BouncyCastle.Asn1.Oiw;
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Esf
+{
+	/// <remarks>
+	/// <code>
+	/// OtherHash ::= CHOICE {
+	///		sha1Hash	OtherHashValue, -- This contains a SHA-1 hash
+	/// 	otherHash	OtherHashAlgAndValue
+	///	}
+	///	
+	///	OtherHashValue ::= OCTET STRING
+	/// </code>
+	/// </remarks>
+	public class OtherHash
+		: Asn1Encodable, IAsn1Choice
+	{
+		private readonly Asn1OctetString		sha1Hash;
+		private readonly OtherHashAlgAndValue	otherHash;
+
+		public static OtherHash GetInstance(
+			object obj)
+		{
+			if (obj == null || obj is OtherHash)
+				return (OtherHash) obj;
+
+			if (obj is Asn1OctetString)
+				return new OtherHash((Asn1OctetString) obj);
+
+			return new OtherHash(
+				OtherHashAlgAndValue.GetInstance(obj));
+		}
+
+		public OtherHash(
+			byte[] sha1Hash)
+		{
+			if (sha1Hash == null)
+				throw new ArgumentNullException("sha1Hash");
+
+			this.sha1Hash = new DerOctetString(sha1Hash);
+		}
+
+		public OtherHash(
+			Asn1OctetString sha1Hash)
+		{
+			if (sha1Hash == null)
+				throw new ArgumentNullException("sha1Hash");
+
+			this.sha1Hash = sha1Hash;
+		}
+
+		public OtherHash(
+			OtherHashAlgAndValue otherHash)
+		{
+			if (otherHash == null)
+				throw new ArgumentNullException("otherHash");
+
+			this.otherHash = otherHash;
+		}
+
+		public AlgorithmIdentifier HashAlgorithm
+		{
+			get
+			{
+				return otherHash == null
+					?	new AlgorithmIdentifier(OiwObjectIdentifiers.IdSha1)
+					:	otherHash.HashAlgorithm;
+			}
+		}
+
+		public byte[] GetHashValue()
+		{
+			return otherHash == null
+				?	sha1Hash.GetOctets()
+				:	otherHash.GetHashValue();
+		}
+
+		public override Asn1Object ToAsn1Object()
+		{
+			return otherHash == null
+				?	sha1Hash
+				:	otherHash.ToAsn1Object();
+		}
+	}
+}