diff options
Diffstat (limited to 'src/main/java/com/lowagie/bc/asn1/BERInputStream.java')
| -rw-r--r-- | src/main/java/com/lowagie/bc/asn1/BERInputStream.java | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/src/main/java/com/lowagie/bc/asn1/BERInputStream.java b/src/main/java/com/lowagie/bc/asn1/BERInputStream.java deleted file mode 100644 index 395c1e7..0000000 --- a/src/main/java/com/lowagie/bc/asn1/BERInputStream.java +++ /dev/null @@ -1,197 +0,0 @@ -package com.lowagie.bc.asn1;
-
-import java.io.ByteArrayOutputStream;
-import java.io.EOFException;
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.Vector;
-
-public class BERInputStream
- extends DERInputStream
-{
- private DERObject END_OF_STREAM = new DERObject() {
- void encode(
- DEROutputStream out)
- throws IOException
- {
- throw new IOException("Eeek!");
- }
-
- };
- public BERInputStream(
- InputStream is)
- {
- super(is);
- }
-
- /**
- * read a string of bytes representing an indefinite length object.
- */
- private byte[] readIndefiniteLengthFully()
- throws IOException
- {
- ByteArrayOutputStream bOut = new ByteArrayOutputStream();
- int b, b1;
-
- b1 = read();
-
- while ((b = read()) >= 0)
- {
- if (b1 == 0 && b == 0)
- {
- break;
- }
-
- bOut.write(b1);
- b1 = b;
- }
-
- return bOut.toByteArray();
- }
-
- private BERConstructedOctetString buildConstructedOctetString()
- throws IOException
- {
- Vector octs = new Vector();
-
- for (;;)
- {
- DERObject o = readObject();
-
- if (o == END_OF_STREAM)
- {
- break;
- }
-
- octs.addElement(o);
- }
-
- return new BERConstructedOctetString(octs);
- }
-
- public DERObject readObject()
- throws IOException
- {
- int tag = read();
- if (tag == -1)
- {
- throw new EOFException();
- }
-
- int length = readLength();
-
- if (length < 0) // indefinite length method
- {
- switch (tag)
- {
- case NULL:
- return null;
- case SEQUENCE | CONSTRUCTED:
- BERConstructedSequence seq = new BERConstructedSequence();
-
- for (;;)
- {
- DERObject obj = readObject();
-
- if (obj == END_OF_STREAM)
- {
- break;
- }
-
- seq.addObject(obj);
- }
- return seq;
- case OCTET_STRING | CONSTRUCTED:
- return buildConstructedOctetString();
- case SET | CONSTRUCTED:
- ASN1EncodableVector v = new ASN1EncodableVector();
-
- for (;;)
- {
- DERObject obj = readObject();
-
- if (obj == END_OF_STREAM)
- {
- break;
- }
-
- v.add(obj);
- }
- return new BERSet(v);
- default:
- //
- // with tagged object tag number is bottom 5 bits
- //
- if ((tag & TAGGED) != 0)
- {
- if ((tag & 0x1f) == 0x1f)
- {
- throw new IOException("unsupported high tag encountered");
- }
-
- //
- // simple type - implicit... return an octet string
- //
- if ((tag & CONSTRUCTED) == 0)
- {
- byte[] bytes = readIndefiniteLengthFully();
-
- return new BERTaggedObject(false, tag & 0x1f, new DEROctetString(bytes));
- }
-
- //
- // either constructed or explicitly tagged
- //
- DERObject dObj = readObject();
-
- if (dObj == END_OF_STREAM) // empty tag!
- {
- return new DERTaggedObject(tag & 0x1f);
- }
-
- DERObject next = readObject();
-
- //
- // explicitly tagged (probably!) - if it isn't we'd have to
- // tell from the context
- //
- if (next == END_OF_STREAM)
- {
- return new BERTaggedObject(tag & 0x1f, dObj);
- }
-
- //
- // another implicit object, we'll create a sequence...
- //
- seq = new BERConstructedSequence();
-
- seq.addObject(dObj);
-
- do
- {
- seq.addObject(next);
- next = readObject();
- }
- while (next != END_OF_STREAM);
-
- return new BERTaggedObject(false, tag & 0x1f, seq);
- }
-
- throw new IOException("unknown BER object encountered");
- }
- }
- else
- {
- if (tag == 0 && length == 0) // end of contents marker.
- {
- return END_OF_STREAM;
- }
-
- byte[] bytes = new byte[length];
-
- readFully(bytes);
-
- return buildObject(tag, bytes);
- }
- }
-}
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