diff options
author | David Hook <dgh@cryptoworkshop.com> | 2013-05-31 11:07:45 +0400 |
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committer | David Hook <dgh@cryptoworkshop.com> | 2013-05-31 11:07:45 +0400 |
commit | 2b976f5364cfdbc37d3086019d93483c983eb80b (patch) | |
tree | cb846af3fd1d43f9c2562a1fb2d06b997ad8f229 /core/src/main/java/org/bouncycastle/asn1/DERSequence.java | |
parent | 5f714bd92fbd780d22406f4bc3681be005f6f04a (diff) |
initial reshuffle
Diffstat (limited to 'core/src/main/java/org/bouncycastle/asn1/DERSequence.java')
-rw-r--r-- | core/src/main/java/org/bouncycastle/asn1/DERSequence.java | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/core/src/main/java/org/bouncycastle/asn1/DERSequence.java b/core/src/main/java/org/bouncycastle/asn1/DERSequence.java new file mode 100644 index 00000000..ad48a833 --- /dev/null +++ b/core/src/main/java/org/bouncycastle/asn1/DERSequence.java @@ -0,0 +1,98 @@ +package org.bouncycastle.asn1; + +import java.io.IOException; +import java.util.Enumeration; + +public class DERSequence + extends ASN1Sequence +{ + private int bodyLength = -1; + + /** + * create an empty sequence + */ + public DERSequence() + { + } + + /** + * create a sequence containing one object + */ + public DERSequence( + ASN1Encodable obj) + { + super(obj); + } + + /** + * create a sequence containing a vector of objects. + */ + public DERSequence( + ASN1EncodableVector v) + { + super(v); + } + + /** + * create a sequence containing an array of objects. + */ + public DERSequence( + ASN1Encodable[] array) + { + super(array); + } + + private int getBodyLength() + throws IOException + { + if (bodyLength < 0) + { + int length = 0; + + for (Enumeration e = this.getObjects(); e.hasMoreElements();) + { + Object obj = e.nextElement(); + + length += ((ASN1Encodable)obj).toASN1Primitive().toDERObject().encodedLength(); + } + + bodyLength = length; + } + + return bodyLength; + } + + int encodedLength() + throws IOException + { + int length = getBodyLength(); + + return 1 + StreamUtil.calculateBodyLength(length) + length; + } + + /* + * A note on the implementation: + * <p> + * As DER requires the constructed, definite-length model to + * be used for structured types, this varies slightly from the + * ASN.1 descriptions given. Rather than just outputting SEQUENCE, + * we also have to specify CONSTRUCTED, and the objects length. + */ + void encode( + ASN1OutputStream out) + throws IOException + { + ASN1OutputStream dOut = out.getDERSubStream(); + int length = getBodyLength(); + + out.write(BERTags.SEQUENCE | BERTags.CONSTRUCTED); + out.writeLength(length); + + for (Enumeration e = this.getObjects(); e.hasMoreElements();) + { + Object obj = e.nextElement(); + + dOut.writeObject((ASN1Encodable)obj); + } + } +} |