1 files changed, 378 insertions, 0 deletions
diff --git a/crypto/src/asn1/util/Asn1Dump.cs b/crypto/src/asn1/util/Asn1Dump.cs
new file mode 100644
index 000000000..43d485500
--- /dev/null
+++ b/crypto/src/asn1/util/Asn1Dump.cs
@@ -0,0 +1,378 @@
+using System;
+using System.Collections;
+using System.IO;
+using System.Text;
+
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Encoders;
+
+namespace Org.BouncyCastle.Asn1.Utilities
+{
+    public sealed class Asn1Dump
+    {
+		private static readonly string NewLine = Platform.NewLine;
+
+		private Asn1Dump()
+        {
+        }
+
+        private const string Tab = "    ";
+        private const int SampleSize = 32;
+
+        /**
+         * dump a Der object as a formatted string with indentation
+         *
+         * @param obj the Asn1Object to be dumped out.
+         */
+        private static void AsString(
+            string			indent,
+            bool			verbose,
+            Asn1Object		obj,
+			StringBuilder	buf)
+        {
+            if (obj is Asn1Sequence)
+            {
+				string tab = indent + Tab;
+				buf.Append(indent);
+                if (obj is BerSequence)
+                {
+                    buf.Append("BER Sequence");
+                }
+                else if (obj is DerSequence)
+                {
+                    buf.Append("DER Sequence");
+                }
+                else
+                {
+                    buf.Append("Sequence");
+                }
+
+                buf.Append(NewLine);
+
+				foreach (Asn1Encodable o in ((Asn1Sequence)obj))
+				{
+                    if (o == null || o is Asn1Null)
+                    {
+                        buf.Append(tab);
+                        buf.Append("NULL");
+                        buf.Append(NewLine);
+                    }
+                    else
+                    {
+                        AsString(tab, verbose, o.ToAsn1Object(), buf);
+                    }
+                }
+            }
+            else if (obj is DerTaggedObject)
+            {
+                string tab = indent + Tab;
+				buf.Append(indent);
+                if (obj is BerTaggedObject)
+                {
+                    buf.Append("BER Tagged [");
+                }
+                else
+                {
+                    buf.Append("Tagged [");
+                }
+
+				DerTaggedObject o = (DerTaggedObject)obj;
+
+				buf.Append(((int)o.TagNo).ToString());
+                buf.Append(']');
+
+				if (!o.IsExplicit())
+                {
+                    buf.Append(" IMPLICIT ");
+                }
+
+				buf.Append(NewLine);
+
+				if (o.IsEmpty())
+                {
+                    buf.Append(tab);
+                    buf.Append("EMPTY");
+                    buf.Append(NewLine);
+                }
+                else
+                {
+                    AsString(tab, verbose, o.GetObject(), buf);
+                }
+            }
+            else if (obj is BerSet)
+            {
+                string tab = indent + Tab;
+
+				buf.Append(indent);
+                buf.Append("BER Set");
+                buf.Append(NewLine);
+
+				foreach (Asn1Encodable o in ((Asn1Set)obj))
+				{
+                    if (o == null)
+                    {
+                        buf.Append(tab);
+                        buf.Append("NULL");
+                        buf.Append(NewLine);
+                    }
+                    else
+                    {
+                        AsString(tab, verbose, o.ToAsn1Object(), buf);
+                    }
+                }
+            }
+            else if (obj is DerSet)
+            {
+                string tab = indent + Tab;
+
+				buf.Append(indent);
+                buf.Append("DER Set");
+                buf.Append(NewLine);
+
+				foreach (Asn1Encodable o in ((Asn1Set)obj))
+				{
+                    if (o == null)
+                    {
+                        buf.Append(tab);
+                        buf.Append("NULL");
+                        buf.Append(NewLine);
+                    }
+                    else
+                    {
+                        AsString(tab, verbose, o.ToAsn1Object(), buf);
+                    }
+                }
+            }
+            else if (obj is DerObjectIdentifier)
+            {
+                buf.Append(indent + "ObjectIdentifier(" + ((DerObjectIdentifier)obj).Id + ")" + NewLine);
+            }
+            else if (obj is DerBoolean)
+            {
+                buf.Append(indent + "Boolean(" + ((DerBoolean)obj).IsTrue + ")" + NewLine);
+            }
+            else if (obj is DerInteger)
+            {
+                buf.Append(indent + "Integer(" + ((DerInteger)obj).Value + ")" + NewLine);
+            }
+			else if (obj is BerOctetString)
+			{
+				byte[] octets = ((Asn1OctetString)obj).GetOctets();
+				string extra = verbose ? dumpBinaryDataAsString(indent, octets) : "";
+				buf.Append(indent + "BER Octet String" + "[" + octets.Length + "] " + extra + NewLine);
+			}
+            else if (obj is DerOctetString)
+            {
+				byte[] octets = ((Asn1OctetString)obj).GetOctets();
+				string extra = verbose ? dumpBinaryDataAsString(indent, octets) : "";
+				buf.Append(indent + "DER Octet String" + "[" + octets.Length + "] " + extra + NewLine);
+			}
+			else if (obj is DerBitString)
+			{
+				DerBitString bt = (DerBitString)obj; 
+				byte[] bytes = bt.GetBytes();
+				string extra = verbose ? dumpBinaryDataAsString(indent, bytes) : "";
+				buf.Append(indent + "DER Bit String" + "[" + bytes.Length + ", " + bt.PadBits + "] " + extra + NewLine);
+			}
+            else if (obj is DerIA5String)
+            {
+                buf.Append(indent + "IA5String(" + ((DerIA5String)obj).GetString() + ") " + NewLine);
+            }
+			else if (obj is DerUtf8String)
+			{
+				buf.Append(indent + "UTF8String(" + ((DerUtf8String)obj).GetString() + ") " + NewLine);
+			}
+            else if (obj is DerPrintableString)
+            {
+                buf.Append(indent + "PrintableString(" + ((DerPrintableString)obj).GetString() + ") " + NewLine);
+            }
+            else if (obj is DerVisibleString)
+            {
+                buf.Append(indent + "VisibleString(" + ((DerVisibleString)obj).GetString() + ") " + NewLine);
+            }
+            else if (obj is DerBmpString)
+            {
+                buf.Append(indent + "BMPString(" + ((DerBmpString)obj).GetString() + ") " + NewLine);
+            }
+            else if (obj is DerT61String)
+            {
+                buf.Append(indent + "T61String(" + ((DerT61String)obj).GetString() + ") " + NewLine);
+            }
+            else if (obj is DerUtcTime)
+            {
+                buf.Append(indent + "UTCTime(" + ((DerUtcTime)obj).TimeString + ") " + NewLine);
+            }
+			else if (obj is DerGeneralizedTime)
+			{
+				buf.Append(indent + "GeneralizedTime(" + ((DerGeneralizedTime)obj).GetTime() + ") " + NewLine);
+			}
+            else if (obj is DerUnknownTag)
+            {
+				string hex = Hex.ToHexString(((DerUnknownTag)obj).GetData());
+                buf.Append(indent + "Unknown " + ((int)((DerUnknownTag)obj).Tag).ToString("X") + " " + hex + NewLine);
+            }
+            else if (obj is BerApplicationSpecific)
+            {
+                buf.Append(outputApplicationSpecific("BER", indent, verbose, (BerApplicationSpecific)obj));
+            }
+            else if (obj is DerApplicationSpecific)
+            {
+                buf.Append(outputApplicationSpecific("DER", indent, verbose, (DerApplicationSpecific)obj));
+            }
+			else if (obj is DerEnumerated)
+			{
+				DerEnumerated en = (DerEnumerated)obj;
+				buf.Append(indent + "DER Enumerated(" + en.Value + ")" + NewLine);
+			}
+			else if (obj is DerExternal)
+			{
+				DerExternal ext = (DerExternal)obj;
+				buf.Append(indent + "External " + NewLine);
+                string tab = indent + Tab;
+
+				if (ext.DirectReference != null)
+				{
+					buf.Append(tab + "Direct Reference: " + ext.DirectReference.Id + NewLine);
+				}
+				if (ext.IndirectReference != null)
+				{
+					buf.Append(tab + "Indirect Reference: " + ext.IndirectReference.ToString() + NewLine);
+				}
+				if (ext.DataValueDescriptor != null)
+				{
+					AsString(tab, verbose, ext.DataValueDescriptor, buf);
+				}
+				buf.Append(tab + "Encoding: " + ext.Encoding + NewLine);
+				AsString(tab, verbose, ext.ExternalContent, buf);
+			}
+            else
+            {
+                buf.Append(indent + obj.ToString() + NewLine);
+            }
+        }
+
+        private static string outputApplicationSpecific(
+            string					type,
+            string					indent,
+            bool					verbose,
+            DerApplicationSpecific	app)
+        {
+            StringBuilder buf = new StringBuilder();
+
+            if (app.IsConstructed())
+            {
+                try
+                {
+                    Asn1Sequence s = Asn1Sequence.GetInstance(app.GetObject(Asn1Tags.Sequence));
+                    buf.Append(indent + type + " ApplicationSpecific[" + app.ApplicationTag + "]" + NewLine);
+                    foreach (Asn1Encodable ae in s)
+                    {
+                    	AsString(indent + Tab, verbose, ae.ToAsn1Object(), buf);
+                    }
+                }
+                catch (IOException e)
+                {
+                    buf.Append(e);
+                }
+                return buf.ToString();
+            }
+
+            return indent + type + " ApplicationSpecific[" + app.ApplicationTag + "] ("
+                + Hex.ToHexString(app.GetContents()) + ")" + NewLine;
+        }
+
+		[Obsolete("Use version accepting Asn1Encodable")]
+		public static string DumpAsString(
+            object   obj)
+        {
+            if (obj is Asn1Encodable)
+            {
+				StringBuilder buf = new StringBuilder();
+                AsString("", false, ((Asn1Encodable)obj).ToAsn1Object(), buf);
+				return buf.ToString();
+            }
+
+            return "unknown object type " + obj.ToString();
+        }
+
+		/**
+		 * dump out a DER object as a formatted string, in non-verbose mode
+		 *
+		 * @param obj the Asn1Encodable to be dumped out.
+		 * @return  the resulting string.
+		 */
+		public static string DumpAsString(
+			Asn1Encodable obj)
+		{
+			return DumpAsString(obj, false);
+		}
+
+		/**
+		 * Dump out the object as a string
+		 *
+		 * @param obj the Asn1Encodable to be dumped out.
+		 * @param verbose  if true, dump out the contents of octet and bit strings.
+		 * @return  the resulting string.
+		 */
+		public static string DumpAsString(
+			Asn1Encodable	obj,
+			bool			verbose)
+		{
+			StringBuilder buf = new StringBuilder();
+			AsString("", verbose, obj.ToAsn1Object(), buf);
+			return buf.ToString();
+		}
+
+		private static string dumpBinaryDataAsString(string indent, byte[] bytes)
+		{
+			indent += Tab;
+
+			StringBuilder buf = new StringBuilder(NewLine);
+
+			for (int i = 0; i < bytes.Length; i += SampleSize)
+			{
+				if (bytes.Length - i > SampleSize)
+				{
+					buf.Append(indent);
+					buf.Append(Hex.ToHexString(bytes, i, SampleSize));
+					buf.Append(Tab);
+					buf.Append(calculateAscString(bytes, i, SampleSize));
+					buf.Append(NewLine);
+				}
+				else
+				{
+					buf.Append(indent);
+					buf.Append(Hex.ToHexString(bytes, i, bytes.Length - i));
+					for (int j = bytes.Length - i; j != SampleSize; j++)
+					{
+						buf.Append("  ");
+					}
+					buf.Append(Tab);
+					buf.Append(calculateAscString(bytes, i, bytes.Length - i));
+					buf.Append(NewLine);
+				}
+			}
+
+			return buf.ToString();
+		}
+
+		private static string calculateAscString(
+			byte[]	bytes,
+			int		off,
+			int		len)
+		{
+			StringBuilder buf = new StringBuilder();
+
+			for (int i = off; i != off + len; i++)
+			{
+				char c = (char)bytes[i]; 
+				if (c >= ' ' && c <= '~')
+				{
+					buf.Append(c);
+				}
+			}
+
+			return buf.ToString();
+		}
+    }
+}