1 package org.bouncycastle.asn1; 2 3 import java.io.IOException; 4 import java.util.Enumeration; 5 6 /** 7 * Note: this class is for processing DER/DL encoded sequences only. 8 */ 9 class LazyEncodedSequence 10 extends ASN1Sequence 11 { 12 private byte[] encoded; 13 LazyEncodedSequence( byte[] encoded)14 LazyEncodedSequence( 15 byte[] encoded) 16 throws IOException 17 { 18 this.encoded = encoded; 19 } 20 parse()21 private void parse() 22 { 23 Enumeration en = new LazyConstructionEnumeration(encoded); 24 25 while (en.hasMoreElements()) 26 { 27 seq.addElement(en.nextElement()); 28 } 29 30 encoded = null; 31 } 32 getObjectAt(int index)33 public synchronized ASN1Encodable getObjectAt(int index) 34 { 35 if (encoded != null) 36 { 37 parse(); 38 } 39 40 return super.getObjectAt(index); 41 } 42 getObjects()43 public synchronized Enumeration getObjects() 44 { 45 if (encoded == null) 46 { 47 return super.getObjects(); 48 } 49 50 return new LazyConstructionEnumeration(encoded); 51 } 52 size()53 public synchronized int size() 54 { 55 if (encoded != null) 56 { 57 parse(); 58 } 59 60 return super.size(); 61 } 62 toDERObject()63 ASN1Primitive toDERObject() 64 { 65 if (encoded != null) 66 { 67 parse(); 68 } 69 70 return super.toDERObject(); 71 } 72 toDLObject()73 ASN1Primitive toDLObject() 74 { 75 if (encoded != null) 76 { 77 parse(); 78 } 79 80 return super.toDLObject(); 81 } 82 encodedLength()83 int encodedLength() 84 throws IOException 85 { 86 if (encoded != null) 87 { 88 return 1 + StreamUtil.calculateBodyLength(encoded.length) + encoded.length; 89 } 90 else 91 { 92 return super.toDLObject().encodedLength(); 93 } 94 } 95 encode( ASN1OutputStream out)96 void encode( 97 ASN1OutputStream out) 98 throws IOException 99 { 100 if (encoded != null) 101 { 102 out.writeEncoded(BERTags.SEQUENCE | BERTags.CONSTRUCTED, encoded); 103 } 104 else 105 { 106 super.toDLObject().encode(out); 107 } 108 } 109 } 110