diff options
Diffstat (limited to 'libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/LazyEncodedSequence.java')
-rw-r--r-- | libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/LazyEncodedSequence.java | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/LazyEncodedSequence.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/LazyEncodedSequence.java new file mode 100644 index 000000000..70f13853f --- /dev/null +++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/LazyEncodedSequence.java @@ -0,0 +1,109 @@ +package org.spongycastle.asn1; + +import java.io.IOException; +import java.util.Enumeration; + +/** + * Note: this class is for processing DER/DL encoded sequences only. + */ +class LazyEncodedSequence + extends ASN1Sequence +{ + private byte[] encoded; + + LazyEncodedSequence( + byte[] encoded) + throws IOException + { + this.encoded = encoded; + } + + private void parse() + { + Enumeration en = new LazyConstructionEnumeration(encoded); + + while (en.hasMoreElements()) + { + seq.addElement(en.nextElement()); + } + + encoded = null; + } + + public synchronized ASN1Encodable getObjectAt(int index) + { + if (encoded != null) + { + parse(); + } + + return super.getObjectAt(index); + } + + public synchronized Enumeration getObjects() + { + if (encoded == null) + { + return super.getObjects(); + } + + return new LazyConstructionEnumeration(encoded); + } + + public synchronized int size() + { + if (encoded != null) + { + parse(); + } + + return super.size(); + } + + ASN1Primitive toDERObject() + { + if (encoded != null) + { + parse(); + } + + return super.toDERObject(); + } + + ASN1Primitive toDLObject() + { + if (encoded != null) + { + parse(); + } + + return super.toDLObject(); + } + + int encodedLength() + throws IOException + { + if (encoded != null) + { + return 1 + StreamUtil.calculateBodyLength(encoded.length) + encoded.length; + } + else + { + return super.toDLObject().encodedLength(); + } + } + + void encode( + ASN1OutputStream out) + throws IOException + { + if (encoded != null) + { + out.writeEncoded(BERTags.SEQUENCE | BERTags.CONSTRUCTED, encoded); + } + else + { + super.toDLObject().encode(out); + } + } +} |