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1: /* PolicyQualifierInfo.java -- policy qualifier info object. 2: Copyright (C) 2003, 2004 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package java.security.cert; 40: 41: import gnu.java.io.ASN1ParsingException; 42: import gnu.java.security.OID; 43: import gnu.java.security.der.DERReader; 44: import gnu.java.security.der.DERValue; 45: 46: import java.io.ByteArrayInputStream; 47: import java.io.IOException; 48: 49: /** 50: * The PolicyQualifierInfo X.509 certificate extension. 51: * PolicyQualifierInfo objects are represented by the ASN.1 structure: 52: * 53: * <pre> 54: * PolicyQualifierInfo ::= SEQUENCE { 55: * policyQualifierId PolicyQualifierId, 56: * qualifier ANY DEFINED BY policyQualifierId 57: * } 58: * 59: * PolicyQualifierId ::= OBJECT IDENTIFIER 60: * </pre> 61: * 62: * @since 1.4 63: * @specnote this class was final in 1.4, but beginning with 1.5 is not 64: */ 65: public class PolicyQualifierInfo 66: { 67: 68: // Fields. 69: // ------------------------------------------------------------------------ 70: 71: /** The <code>policyQualifierId</code> field. */ 72: private OID oid; 73: 74: /** The DER encoded form of this object. */ 75: private byte[] encoded; 76: 77: /** The DER encoded form of the <code>qualifier</code> field. */ 78: private DERValue qualifier; 79: 80: // Constructor. 81: // ------------------------------------------------------------------------ 82: 83: /** 84: * Create a new PolicyQualifierInfo object from the DER encoded form 85: * passed in the byte array. The argument is copied. 86: * 87: * <p>The ASN.1 form of PolicyQualifierInfo is: 88: <pre> 89: PolicyQualifierInfo ::= SEQUENCE { 90: policyQualifierId PolicyQualifierId, 91: qualifier ANY DEFINED BY policyQualifierId 92: } 93: 94: PolicyQualifierId ::= OBJECT IDENTIFIER 95: </pre> 96: * 97: * @param encoded The DER encoded form. 98: * @throws IOException If the structure cannot be parsed from the 99: * encoded bytes. 100: */ 101: public PolicyQualifierInfo(byte[] encoded) throws IOException 102: { 103: if (encoded == null) 104: throw new IOException("null bytes"); 105: this.encoded = (byte[]) encoded.clone(); 106: DERReader in = new DERReader(new ByteArrayInputStream(this.encoded)); 107: DERValue qualInfo = in.read(); 108: if (!qualInfo.isConstructed()) 109: throw new ASN1ParsingException("malformed PolicyQualifierInfo"); 110: DERValue val = in.read(); 111: if (!(val.getValue() instanceof OID)) 112: throw new ASN1ParsingException("value read not an OBJECT IDENTIFIER"); 113: oid = (OID) val.getValue(); 114: if (val.getEncodedLength() < val.getLength()) 115: qualifier = in.read(); 116: } 117: 118: // Instance methods. 119: // ------------------------------------------------------------------------ 120: 121: /** 122: * Returns the <code>policyQualifierId</code> field of this structure, 123: * as a dotted-decimal representation of the object identifier. 124: * 125: * @return This structure's OID field. 126: */ 127: public final String getPolicyQualifierId() 128: { 129: return oid.toString(); 130: } 131: 132: /** 133: * Returns the DER encoded form of this object; the contents of the 134: * returned byte array are equivalent to those that were passed to the 135: * constructor. The byte array is cloned every time this method is 136: * called. 137: * 138: * @return The encoded form. 139: */ 140: public final byte[] getEncoded() 141: { 142: return (byte[]) encoded.clone(); 143: } 144: 145: /** 146: * Get the <code>qualifier</code> field of this object, as a DER 147: * encoded byte array. The byte array returned is cloned every time 148: * this method is called. 149: * 150: * @return The encoded qualifier. 151: */ 152: public final byte[] getPolicyQualifier() 153: { 154: if (qualifier == null) 155: return new byte[0]; 156: return qualifier.getEncoded(); 157: } 158: 159: /** 160: * Returns a printable string representation of this object. 161: * 162: * @return The string representation. 163: */ 164: public String toString() 165: { 166: return "PolicyQualifierInfo { policyQualifierId ::= " + oid 167: + ", qualifier ::= " + qualifier + " }"; 168: } 169: }