| static private ReadLength ( Stream s, int limit ) : int | ||
| s | Stream | |
| limit | int | |
| 리턴 | int | |
public virtual IAsn1Convertible ReadObject()
{
int tag = _in.ReadByte();
if (tag == -1)
{
return(null);
}
// turn of looking for "00" while we resolve the tag
Set00Check(false);
//
// calculate tag number
//
int tagNo = Asn1InputStream.ReadTagNumber(_in, tag);
bool isConstructed = (tag & Asn1Tags.Constructed) != 0;
//
// calculate length
//
int length = Asn1InputStream.ReadLength(_in, _limit);
if (length < 0) // indefinite length method
{
if (!isConstructed)
{
throw new IOException("indefinite length primitive encoding encountered");
}
IndefiniteLengthInputStream indIn = new IndefiniteLengthInputStream(_in, _limit);
Asn1StreamParser sp = new Asn1StreamParser(indIn, _limit);
if ((tag & Asn1Tags.Application) != 0)
{
return(new BerApplicationSpecificParser(tagNo, sp));
}
if ((tag & Asn1Tags.Tagged) != 0)
{
return(new BerTaggedObjectParser(true, tagNo, sp));
}
return(sp.ReadIndef(tagNo));
}
else
{
DefiniteLengthInputStream defIn = new DefiniteLengthInputStream(_in, length);
if ((tag & Asn1Tags.Application) != 0)
{
return(new DerApplicationSpecific(isConstructed, tagNo, defIn.ToArray()));
}
if ((tag & Asn1Tags.Tagged) != 0)
{
return(new BerTaggedObjectParser(isConstructed, tagNo, new Asn1StreamParser(defIn)));
}
if (isConstructed)
{
// TODO There are other tags that may be constructed (e.g. BitString)
switch (tagNo)
{
case Asn1Tags.OctetString:
//
// yes, people actually do this...
//
return(new BerOctetStringParser(new Asn1StreamParser(defIn)));
case Asn1Tags.Sequence:
return(new DerSequenceParser(new Asn1StreamParser(defIn)));
case Asn1Tags.Set:
return(new DerSetParser(new Asn1StreamParser(defIn)));
case Asn1Tags.External:
return(new DerExternalParser(new Asn1StreamParser(defIn)));
default:
throw new IOException("unknown tag " + tagNo + " encountered");
}
}
// Some primitive encodings can be handled by parsers too...
switch (tagNo)
{
case Asn1Tags.OctetString:
return(new DerOctetStringParser(defIn));
}
try
{
return(Asn1InputStream.CreatePrimitiveDerObject(tagNo, defIn, tmpBuffers));
}
catch (ArgumentException e)
{
throw new Asn1Exception("corrupted stream detected", e);
}
}
}
public virtual IAsn1Convertible ReadObject()
{
//IL_004f: Unknown result type (might be due to invalid IL or missing references)
//IL_014a: Unknown result type (might be due to invalid IL or missing references)
//IL_0174: Expected O, but got Unknown
int num = _in.ReadByte();
if (num == -1)
{
return(null);
}
Set00Check(enabled: false);
int num2 = Asn1InputStream.ReadTagNumber(_in, num);
bool flag = (num & 0x20) != 0;
int num3 = Asn1InputStream.ReadLength(_in, _limit);
if (num3 < 0)
{
if (!flag)
{
throw new IOException("indefinite length primitive encoding encountered");
}
IndefiniteLengthInputStream inStream = new IndefiniteLengthInputStream(_in, _limit);
Asn1StreamParser asn1StreamParser = new Asn1StreamParser((Stream)(object)inStream, _limit);
if (((uint)num & 0x40u) != 0)
{
return(new BerApplicationSpecificParser(num2, asn1StreamParser));
}
if (((uint)num & 0x80u) != 0)
{
return(new BerTaggedObjectParser(constructed: true, num2, asn1StreamParser));
}
return(asn1StreamParser.ReadIndef(num2));
}
DefiniteLengthInputStream definiteLengthInputStream = new DefiniteLengthInputStream(_in, num3);
if (((uint)num & 0x40u) != 0)
{
return(new DerApplicationSpecific(flag, num2, definiteLengthInputStream.ToArray()));
}
if (((uint)num & 0x80u) != 0)
{
return(new BerTaggedObjectParser(flag, num2, new Asn1StreamParser((Stream)(object)definiteLengthInputStream)));
}
if (flag)
{
switch (num2)
{
case 4:
return(new BerOctetStringParser(new Asn1StreamParser((Stream)(object)definiteLengthInputStream)));
case 16:
return(new DerSequenceParser(new Asn1StreamParser((Stream)(object)definiteLengthInputStream)));
case 17:
return(new DerSetParser(new Asn1StreamParser((Stream)(object)definiteLengthInputStream)));
case 8:
return(new DerExternalParser(new Asn1StreamParser((Stream)(object)definiteLengthInputStream)));
default:
throw new IOException(string.Concat((object)"unknown tag ", (object)num2, (object)" encountered"));
}
}
int num4 = num2;
if (num4 == 4)
{
return(new DerOctetStringParser(definiteLengthInputStream));
}
try
{
return(Asn1InputStream.CreatePrimitiveDerObject(num2, definiteLengthInputStream, tmpBuffers));
}
catch (ArgumentException val)
{
ArgumentException exception = val;
throw new Asn1Exception("corrupted stream detected", (global::System.Exception)(object) exception);
}
}
public virtual IAsn1Convertible ReadObject()
{
IAsn1Convertible convertible;
int tag = this._in.ReadByte();
if (tag == -1)
{
return(null);
}
this.Set00Check(false);
int num2 = Asn1InputStream.ReadTagNumber(this._in, tag);
bool isConstructed = (tag & 0x20) != 0;
int length = Asn1InputStream.ReadLength(this._in, this._limit);
if (length < 0)
{
if (!isConstructed)
{
throw new IOException("indefinite length primitive encoding encountered");
}
IndefiniteLengthInputStream stream = new IndefiniteLengthInputStream(this._in, this._limit);
Asn1StreamParser parser = new Asn1StreamParser(stream, this._limit);
if ((tag & 0x40) != 0)
{
return(new BerApplicationSpecificParser(num2, parser));
}
if ((tag & 0x80) != 0)
{
return(new BerTaggedObjectParser(true, num2, parser));
}
return(parser.ReadIndef(num2));
}
DefiniteLengthInputStream inStream = new DefiniteLengthInputStream(this._in, length);
if ((tag & 0x40) != 0)
{
return(new DerApplicationSpecific(isConstructed, num2, inStream.ToArray()));
}
if ((tag & 0x80) != 0)
{
return(new BerTaggedObjectParser(isConstructed, num2, new Asn1StreamParser(inStream)));
}
if (isConstructed)
{
switch (num2)
{
case 0x10:
return(new DerSequenceParser(new Asn1StreamParser(inStream)));
case 0x11:
return(new DerSetParser(new Asn1StreamParser(inStream)));
case 4:
return(new BerOctetStringParser(new Asn1StreamParser(inStream)));
case 8:
return(new DerExternalParser(new Asn1StreamParser(inStream)));
}
throw new IOException("unknown tag " + num2 + " encountered");
}
if (num2 == 4)
{
return(new DerOctetStringParser(inStream));
}
try
{
convertible = Asn1InputStream.CreatePrimitiveDerObject(num2, inStream, this.tmpBuffers);
}
catch (ArgumentException exception)
{
throw new Asn1Exception("corrupted stream detected", exception);
}
return(convertible);
}
public Asn1Object ReadObject()
{
int num = this.ReadByte();
if (num <= 0)
{
if (num == 0)
{
throw new IOException("unexpected end-of-contents marker");
}
return(null);
}
else
{
int num2 = Asn1InputStream.ReadTagNumber(this.s, num);
bool flag = (num & 32) != 0;
int num3 = Asn1InputStream.ReadLength(this.s, this.limit);
if (num3 >= 0)
{
Asn1Object result;
try
{
result = this.BuildObject(num, num2, num3);
}
catch (ArgumentException exception)
{
throw new Asn1Exception("corrupted stream detected", exception);
}
return(result);
}
if (!flag)
{
throw new IOException("indefinite length primitive encoding encountered");
}
IndefiniteLengthInputStream inStream = new IndefiniteLengthInputStream(this.s, this.limit);
Asn1StreamParser parser = new Asn1StreamParser(inStream, this.limit);
if ((num & 64) != 0)
{
return(new BerApplicationSpecificParser(num2, parser).ToAsn1Object());
}
if ((num & 128) != 0)
{
return(new BerTaggedObjectParser(true, num2, parser).ToAsn1Object());
}
int num4 = num2;
if (num4 == 4)
{
return(new BerOctetStringParser(parser).ToAsn1Object());
}
if (num4 == 8)
{
return(new DerExternalParser(parser).ToAsn1Object());
}
switch (num4)
{
case 16:
return(new BerSequenceParser(parser).ToAsn1Object());
case 17:
return(new BerSetParser(parser).ToAsn1Object());
default:
throw new IOException("unknown BER object encountered");
}
}
}
public virtual IAsn1Convertible ReadObject()
{
int num = this._in.ReadByte();
if (num == -1)
{
return(null);
}
this.Set00Check(false);
int num2 = Asn1InputStream.ReadTagNumber(this._in, num);
bool flag = (num & 32) != 0;
int num3 = Asn1InputStream.ReadLength(this._in, this._limit);
if (num3 < 0)
{
if (!flag)
{
throw new IOException("indefinite length primitive encoding encountered");
}
IndefiniteLengthInputStream inStream = new IndefiniteLengthInputStream(this._in, this._limit);
Asn1StreamParser asn1StreamParser = new Asn1StreamParser(inStream, this._limit);
if ((num & 64) != 0)
{
return(new BerApplicationSpecificParser(num2, asn1StreamParser));
}
if ((num & 128) != 0)
{
return(new BerTaggedObjectParser(true, num2, asn1StreamParser));
}
return(asn1StreamParser.ReadIndef(num2));
}
else
{
DefiniteLengthInputStream definiteLengthInputStream = new DefiniteLengthInputStream(this._in, num3);
if ((num & 64) != 0)
{
return(new DerApplicationSpecific(flag, num2, definiteLengthInputStream.ToArray()));
}
if ((num & 128) != 0)
{
return(new BerTaggedObjectParser(flag, num2, new Asn1StreamParser(definiteLengthInputStream)));
}
if (flag)
{
int num4 = num2;
if (num4 == 4)
{
return(new BerOctetStringParser(new Asn1StreamParser(definiteLengthInputStream)));
}
if (num4 == 8)
{
return(new DerExternalParser(new Asn1StreamParser(definiteLengthInputStream)));
}
switch (num4)
{
case 16:
return(new DerSequenceParser(new Asn1StreamParser(definiteLengthInputStream)));
case 17:
return(new DerSetParser(new Asn1StreamParser(definiteLengthInputStream)));
default:
throw new IOException("unknown tag " + num2 + " encountered");
}
}
else
{
int num5 = num2;
if (num5 == 4)
{
return(new DerOctetStringParser(definiteLengthInputStream));
}
IAsn1Convertible result;
try
{
result = Asn1InputStream.CreatePrimitiveDerObject(num2, definiteLengthInputStream, this.tmpBuffers);
}
catch (ArgumentException exception)
{
throw new Asn1Exception("corrupted stream detected", exception);
}
return(result);
}
}
}
public virtual IAsn1Convertible ReadObject()
{
int num = _in.ReadByte();
if (num == -1)
{
return(null);
}
Set00Check(enabled: false);
int num2 = Asn1InputStream.ReadTagNumber(_in, num);
bool flag = (num & 0x20) != 0;
int num3 = Asn1InputStream.ReadLength(_in, _limit);
if (num3 < 0)
{
if (!flag)
{
throw new IOException("indefinite length primitive encoding encountered");
}
IndefiniteLengthInputStream inStream = new IndefiniteLengthInputStream(_in, _limit);
Asn1StreamParser asn1StreamParser = new Asn1StreamParser(inStream, _limit);
if ((num & 0x40) != 0)
{
return(new BerApplicationSpecificParser(num2, asn1StreamParser));
}
if ((num & 0x80) != 0)
{
return(new BerTaggedObjectParser(constructed: true, num2, asn1StreamParser));
}
return(asn1StreamParser.ReadIndef(num2));
}
DefiniteLengthInputStream definiteLengthInputStream = new DefiniteLengthInputStream(_in, num3);
if ((num & 0x40) != 0)
{
return(new DerApplicationSpecific(flag, num2, definiteLengthInputStream.ToArray()));
}
if ((num & 0x80) != 0)
{
return(new BerTaggedObjectParser(flag, num2, new Asn1StreamParser(definiteLengthInputStream)));
}
if (flag)
{
switch (num2)
{
case 4:
return(new BerOctetStringParser(new Asn1StreamParser(definiteLengthInputStream)));
case 16:
return(new DerSequenceParser(new Asn1StreamParser(definiteLengthInputStream)));
case 17:
return(new DerSetParser(new Asn1StreamParser(definiteLengthInputStream)));
case 8:
return(new DerExternalParser(new Asn1StreamParser(definiteLengthInputStream)));
default:
throw new IOException("unknown tag " + num2 + " encountered");
}
}
int num4 = num2;
if (num4 != 4)
{
try
{
return(Asn1InputStream.CreatePrimitiveDerObject(num2, definiteLengthInputStream, tmpBuffers));
IL_019e:
IAsn1Convertible result;
return(result);
}
catch (ArgumentException exception)
{
throw new Asn1Exception("corrupted stream detected", exception);
IL_01b2:
IAsn1Convertible result;
return(result);
}
}
return(new DerOctetStringParser(definiteLengthInputStream));
}