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using System;
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 Asn1Null)
{
buf.Append(indent);
buf.Append("NULL");
buf.Append(NewLine);
}
else if (obj is Asn1Sequence)
{
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);
Asn1Sequence sequence = (Asn1Sequence)obj;
string elementsIndent = indent + Tab;
for (int i = 0, count = sequence.Count; i < count; ++i)
{
AsString(elementsIndent, verbose, sequence[i].ToAsn1Object(), buf);
}
}
else if (obj is Asn1Set)
{
buf.Append(indent);
if (obj is BerSet)
{
buf.Append("BER Set");
}
else if (obj is DerSet)
{
buf.Append("DER Set");
}
else
{
buf.Append("Set");
}
buf.Append(NewLine);
Asn1Set set = (Asn1Set)obj;
string elementsIndent = indent + Tab;
for (int i = 0, count = set.Count; i < count; ++i)
{
AsString(elementsIndent, verbose, set[i].ToAsn1Object(), buf);
}
}
else if (obj is Asn1TaggedObject)
{
string tab = indent + Tab;
buf.Append(indent);
if (obj is BerTaggedObject)
{
buf.Append("BER Tagged [");
}
else
{
buf.Append("Tagged [");
}
Asn1TaggedObject o = (Asn1TaggedObject)obj;
buf.Append(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 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 DerGraphicString)
{
buf.Append(indent + "GraphicString(" + ((DerGraphicString)obj).GetString() + ") " + NewLine);
}
else if (obj is DerVideotexString)
{
buf.Append(indent + "VideotexString(" + ((DerVideotexString)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 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;
}
/**
* 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();
}
}
}
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