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using System;
using System.IO;
using Org.BouncyCastle.Utilities.IO;
namespace Org.BouncyCastle.Asn1
{
[Obsolete("Use 'Asn1OutputStream' instead")]
public class DerOutputStream
: FilterStream
{
[Obsolete("Use 'Asn1OutputStream.Create' instead")]
public DerOutputStream(Stream os)
: base(os)
{
}
public virtual void WriteObject(Asn1Encodable encodable)
{
new DerOutputStreamNew(s).WriteObject(encodable);
}
public virtual void WriteObject(Asn1Object primitive)
{
new DerOutputStreamNew(s).WriteObject(primitive);
}
internal virtual bool IsBer
{
get { return false; }
}
internal void WriteDL(int length)
{
if (length < 128)
{
WriteByte((byte)length);
}
else
{
byte[] stack = new byte[5];
int pos = stack.Length;
do
{
stack[--pos] = (byte)length;
length >>= 8;
}
while (length > 0);
int count = stack.Length - pos;
stack[--pos] = (byte)(0x80 | count);
Write(stack, pos, count + 1);
}
}
internal void WriteEncoded(
int tag,
byte[] bytes)
{
WriteByte((byte)tag);
WriteDL(bytes.Length);
Write(bytes, 0, bytes.Length);
}
internal void WriteEncoded(
int tag,
byte first,
byte[] bytes)
{
WriteByte((byte)tag);
WriteDL(bytes.Length + 1);
WriteByte(first);
Write(bytes, 0, bytes.Length);
}
internal void WriteEncoded(
int tag,
byte[] bytes,
int offset,
int length)
{
WriteByte((byte)tag);
WriteDL(length);
Write(bytes, offset, length);
}
internal void WriteEncoded(
int flags,
int tagNo,
byte[] bytes)
{
WriteIdentifier(true, flags, tagNo);
WriteDL(bytes.Length);
Write(bytes, 0, bytes.Length);
}
internal void WriteIdentifier(bool withID, int identifier)
{
if (withID)
{
WriteByte((byte)identifier);
}
}
internal void WriteIdentifier(bool withID, int flags, int tag)
{
if (!withID)
{
// Don't write the identifier
}
else if (tag < 31)
{
WriteByte((byte)(flags | tag));
}
else
{
byte[] stack = new byte[6];
int pos = stack.Length;
stack[--pos] = (byte)(tag & 0x7F);
while (tag > 127)
{
tag >>= 7;
stack[--pos] = (byte)(tag & 0x7F | 0x80);
}
stack[--pos] = (byte)(flags | 0x1F);
Write(stack, pos, stack.Length - pos);
}
}
}
internal class DerOutputStreamNew
: Asn1OutputStream
{
internal DerOutputStreamNew(Stream os)
: base(os)
{
}
internal override bool IsBer
{
get { return false; }
}
internal override void WritePrimitive(Asn1Object primitive)
{
Asn1Set asn1Set = primitive as Asn1Set;
if (null != asn1Set)
{
/*
* NOTE: Even a DerSet isn't necessarily already in sorted order (particularly from DerSetParser),
* so all sets have to be converted here.
*/
primitive = new DerSet(asn1Set.elements);
}
primitive.Encode(this);
}
}
}
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