Initial Commit

2023-06-21 12:46:23 -04:00
commit c70248a520
1352 changed files with 336780 additions and 0 deletions
--- a/iTechSharp/srcbc/cms/DefaultSignedAttributeTableGenerator.cs
+++ b/iTechSharp/srcbc/cms/DefaultSignedAttributeTableGenerator.cs
@@ -0,0 +1,104 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Cms;
+
+namespace Org.BouncyCastle.Cms
+{
+	/**
+	 * Default signed attributes generator.
+	 */
+	public class DefaultSignedAttributeTableGenerator
+		: CmsAttributeTableGenerator
+	{
+		private readonly Hashtable table;
+
+		/**
+		 * Initialise to use all defaults
+		 */
+		public DefaultSignedAttributeTableGenerator()
+		{
+			table = new Hashtable();
+		}
+
+		/**
+		 * Initialise with some extra attributes or overrides.
+		 *
+		 * @param attributeTable initial attribute table to use.
+		 */
+		public DefaultSignedAttributeTableGenerator(
+			AttributeTable attributeTable)
+		{
+			if (attributeTable != null)
+			{
+				table = attributeTable.ToHashtable();
+			}
+			else
+			{
+				table = new Hashtable();
+			}
+		}
+
+		/**
+		 * Create a standard attribute table from the passed in parameters - this will
+		 * normally include contentType, signingTime, and messageDigest. If the constructor
+		 * using an AttributeTable was used, entries in it for contentType, signingTime, and
+		 * messageDigest will override the generated ones.
+		 *
+		 * @param parameters source parameters for table generation.
+		 *
+		 * @return a filled in Hashtable of attributes.
+		 */
+		protected virtual Hashtable createStandardAttributeTable(
+			IDictionary parameters)
+		{
+			Hashtable std = (Hashtable)table.Clone();
+
+			if (!std.ContainsKey(CmsAttributes.ContentType))
+			{
+				Asn1.Cms.Attribute attr = new Asn1.Cms.Attribute(CmsAttributes.ContentType,
+					new DerSet((DerObjectIdentifier)parameters[CmsAttributeTableParameter.ContentType]));
+				std[attr.AttrType] = attr;
+			}
+
+			if (!std.ContainsKey(CmsAttributes.SigningTime))
+			{
+				Asn1.Cms.Attribute attr = new Asn1.Cms.Attribute(
+					CmsAttributes.SigningTime, new DerSet(new Time(DateTime.UtcNow)));
+				std[attr.AttrType] = attr;
+			}
+
+			if (!std.ContainsKey(CmsAttributes.MessageDigest))
+			{
+				byte[] hash = (byte[])parameters[CmsAttributeTableParameter.Digest];
+				Asn1.Cms.Attribute attr;
+
+				if (hash != null)
+				{
+					attr = new Asn1.Cms.Attribute(
+						CmsAttributes.MessageDigest, new DerSet(new DerOctetString(hash)));
+				}
+				else
+				{
+					attr = new Asn1.Cms.Attribute(
+						CmsAttributes.MessageDigest, new DerSet(DerNull.Instance));
+				}
+
+				std[attr.AttrType] = attr;
+			}
+
+			return std;
+		}
+
+		/**
+		 * @param parameters source parameters
+		 * @return the populated attribute table
+		 */
+		public virtual AttributeTable GetAttributes(
+			IDictionary parameters)
+		{
+			return new AttributeTable(createStandardAttributeTable(parameters));
+		}
+	}
+}