init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Cms/DefaultSignedAttributeTableGenerator.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections;
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Cms;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Cms;
+
+public class DefaultSignedAttributeTableGenerator : CmsAttributeTableGenerator
+{
+	private readonly IDictionary table;
+
+	public DefaultSignedAttributeTableGenerator()
+	{
+		table = Platform.CreateHashtable();
+	}
+
+	public DefaultSignedAttributeTableGenerator(AttributeTable attributeTable)
+	{
+		if (attributeTable != null)
+		{
+			table = attributeTable.ToDictionary();
+		}
+		else
+		{
+			table = Platform.CreateHashtable();
+		}
+	}
+
+	protected virtual Hashtable createStandardAttributeTable(IDictionary parameters)
+	{
+		Hashtable hashtable = new Hashtable(table);
+		DoCreateStandardAttributeTable(parameters, hashtable);
+		return hashtable;
+	}
+
+	private void DoCreateStandardAttributeTable(IDictionary parameters, IDictionary std)
+	{
+		if (parameters.Contains(CmsAttributeTableParameter.ContentType) && !std.Contains(CmsAttributes.ContentType))
+		{
+			DerObjectIdentifier obj = (DerObjectIdentifier)parameters[CmsAttributeTableParameter.ContentType];
+			Org.BouncyCastle.Asn1.Cms.Attribute attribute = new Org.BouncyCastle.Asn1.Cms.Attribute(CmsAttributes.ContentType, new DerSet(obj));
+			std[attribute.AttrType] = attribute;
+		}
+		if (!std.Contains(CmsAttributes.SigningTime))
+		{
+			Org.BouncyCastle.Asn1.Cms.Attribute attribute2 = new Org.BouncyCastle.Asn1.Cms.Attribute(CmsAttributes.SigningTime, new DerSet(new Time(DateTime.UtcNow)));
+			std[attribute2.AttrType] = attribute2;
+		}
+		if (!std.Contains(CmsAttributes.MessageDigest))
+		{
+			byte[] str = (byte[])parameters[CmsAttributeTableParameter.Digest];
+			Org.BouncyCastle.Asn1.Cms.Attribute attribute3 = new Org.BouncyCastle.Asn1.Cms.Attribute(CmsAttributes.MessageDigest, new DerSet(new DerOctetString(str)));
+			std[attribute3.AttrType] = attribute3;
+		}
+	}
+
+	public virtual AttributeTable GetAttributes(IDictionary parameters)
+	{
+		IDictionary attrs = createStandardAttributeTable(parameters);
+		return new AttributeTable(attrs);
+	}
+}