1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 19 package org.apache.harmony.security.provider.crypto; 20 21 import org.apache.harmony.security.asn1.ASN1Integer; 22 import org.apache.harmony.security.asn1.ASN1Sequence; 23 import org.apache.harmony.security.asn1.ASN1Type; 24 import org.apache.harmony.security.asn1.BerInputStream; 25 26 27 /** 28 * The auxiliary class providing means to process ASN1Sequence of three Integers. 29 * Such sequences are parts of ASN1 encoded formats for DSA private and public keys. 30 */ 31 class ThreeIntegerSequence { 32 33 byte[] p, q, g; 34 35 private byte[] encoding; 36 37 ThreeIntegerSequence(byte[] p, byte[] q, byte[] g) { 38 39 this.p = p; 40 this.q = q; 41 this.g = g; 42 encoding = null; 43 } 44 45 public byte[] getEncoded() { 46 if (encoding == null) { 47 encoding = ASN1.encode(this); 48 } 49 return encoding; 50 } 51 52 public static final ASN1Sequence ASN1 = new ASN1Sequence(new ASN1Type[] { 53 ASN1Integer.getInstance(), ASN1Integer.getInstance(), 54 ASN1Integer.getInstance() }) { 55 56 protected Object getDecodedObject(BerInputStream in) { 57 58 Object[] values = (Object[]) in.content; 59 60 return new ThreeIntegerSequence((byte[]) values[0], 61 (byte[]) values[1], (byte[]) values[2]); 62 } 63 64 protected void getValues(Object object, Object[] values) { 65 66 ThreeIntegerSequence mySeq = (ThreeIntegerSequence) object; 67 68 values[0] = mySeq.p; 69 values[1] = mySeq.q; 70 values[2] = mySeq.g; 71 } 72 }; 73 } 74
