diff options
Diffstat (limited to 'core/src/main/java/org/bouncycastle/asn1/ASN1StreamParser.java')
| -rw-r--r-- | core/src/main/java/org/bouncycastle/asn1/ASN1StreamParser.java | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/core/src/main/java/org/bouncycastle/asn1/ASN1StreamParser.java b/core/src/main/java/org/bouncycastle/asn1/ASN1StreamParser.java deleted file mode 100644 index 418c1016..00000000 --- a/core/src/main/java/org/bouncycastle/asn1/ASN1StreamParser.java +++ /dev/null @@ -1,250 +0,0 @@ -package org.bouncycastle.asn1; - -import java.io.ByteArrayInputStream; -import java.io.IOException; -import java.io.InputStream; - -/** - * A parser for ASN.1 streams which also returns, where possible, parsers for the objects it encounters. - */ -public class ASN1StreamParser -{ - private final InputStream _in; - private final int _limit; - private final byte[][] tmpBuffers; - - public ASN1StreamParser( - InputStream in) - { - this(in, StreamUtil.findLimit(in)); - } - - public ASN1StreamParser( - InputStream in, - int limit) - { - this._in = in; - this._limit = limit; - - this.tmpBuffers = new byte[11][]; - } - - public ASN1StreamParser( - byte[] encoding) - { - this(new ByteArrayInputStream(encoding), encoding.length); - } - - ASN1Encodable readIndef(int tagValue) throws IOException - { - // Note: INDEF => CONSTRUCTED - - // TODO There are other tags that may be constructed (e.g. BIT_STRING) - switch (tagValue) - { - case BERTags.EXTERNAL: - return new DERExternalParser(this); - case BERTags.OCTET_STRING: - return new BEROctetStringParser(this); - case BERTags.SEQUENCE: - return new BERSequenceParser(this); - case BERTags.SET: - return new BERSetParser(this); - default: - throw new ASN1Exception("unknown BER object encountered: 0x" + Integer.toHexString(tagValue)); - } - } - - ASN1Encodable readImplicit(boolean constructed, int tag) throws IOException - { - if (_in instanceof IndefiniteLengthInputStream) - { - if (!constructed) - { - throw new IOException("indefinite length primitive encoding encountered"); - } - - return readIndef(tag); - } - - if (constructed) - { - switch (tag) - { - case BERTags.SET: - return new DERSetParser(this); - case BERTags.SEQUENCE: - return new DERSequenceParser(this); - case BERTags.OCTET_STRING: - return new BEROctetStringParser(this); - } - } - else - { - switch (tag) - { - case BERTags.SET: - throw new ASN1Exception("sequences must use constructed encoding (see X.690 8.9.1/8.10.1)"); - case BERTags.SEQUENCE: - throw new ASN1Exception("sets must use constructed encoding (see X.690 8.11.1/8.12.1)"); - case BERTags.OCTET_STRING: - return new DEROctetStringParser((DefiniteLengthInputStream)_in); - } - } - - // TODO ASN1Exception - throw new RuntimeException("implicit tagging not implemented"); - } - - ASN1Primitive readTaggedObject(boolean constructed, int tag) throws IOException - { - if (!constructed) - { - // Note: !CONSTRUCTED => IMPLICIT - DefiniteLengthInputStream defIn = (DefiniteLengthInputStream)_in; - return new DERTaggedObject(false, tag, new DEROctetString(defIn.toByteArray())); - } - - ASN1EncodableVector v = readVector(); - - if (_in instanceof IndefiniteLengthInputStream) - { - return v.size() == 1 - ? new BERTaggedObject(true, tag, v.get(0)) - : new BERTaggedObject(false, tag, BERFactory.createSequence(v)); - } - - return v.size() == 1 - ? new DERTaggedObject(true, tag, v.get(0)) - : new DERTaggedObject(false, tag, DERFactory.createSequence(v)); - } - - public ASN1Encodable readObject() - throws IOException - { - int tag = _in.read(); - 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); - - boolean isConstructed = (tag & BERTags.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 & BERTags.APPLICATION) != 0) - { - return new BERApplicationSpecificParser(tagNo, sp); - } - - if ((tag & BERTags.TAGGED) != 0) - { - return new BERTaggedObjectParser(true, tagNo, sp); - } - - return sp.readIndef(tagNo); - } - else - { - DefiniteLengthInputStream defIn = new DefiniteLengthInputStream(_in, length); - - if ((tag & BERTags.APPLICATION) != 0) - { - return new DERApplicationSpecific(isConstructed, tagNo, defIn.toByteArray()); - } - - if ((tag & BERTags.TAGGED) != 0) - { - return new BERTaggedObjectParser(isConstructed, tagNo, new ASN1StreamParser(defIn)); - } - - if (isConstructed) - { - // TODO There are other tags that may be constructed (e.g. BIT_STRING) - switch (tagNo) - { - case BERTags.OCTET_STRING: - // - // yes, people actually do this... - // - return new BEROctetStringParser(new ASN1StreamParser(defIn)); - case BERTags.SEQUENCE: - return new DERSequenceParser(new ASN1StreamParser(defIn)); - case BERTags.SET: - return new DERSetParser(new ASN1StreamParser(defIn)); - case BERTags.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 BERTags.OCTET_STRING: - return new DEROctetStringParser(defIn); - } - - try - { - return ASN1InputStream.createPrimitiveDERObject(tagNo, defIn, tmpBuffers); - } - catch (IllegalArgumentException e) - { - throw new ASN1Exception("corrupted stream detected", e); - } - } - } - - private void set00Check(boolean enabled) - { - if (_in instanceof IndefiniteLengthInputStream) - { - ((IndefiniteLengthInputStream)_in).setEofOn00(enabled); - } - } - - ASN1EncodableVector readVector() throws IOException - { - ASN1EncodableVector v = new ASN1EncodableVector(); - - ASN1Encodable obj; - while ((obj = readObject()) != null) - { - if (obj instanceof InMemoryRepresentable) - { - v.add(((InMemoryRepresentable)obj).getLoadedObject()); - } - else - { - v.add(obj.toASN1Primitive()); - } - } - - return v; - } -} |