1 /* SignatureAdapter.java -- 2 Copyright 2001, 2002, 2006, 2010 Free Software Foundation, Inc. 3 4 This file is a 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 of the License, or (at 9 your option) 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; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 19 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 gnu.java.security.jce.sig; 40 41 import gnu.java.security.Configuration; 42 import gnu.java.security.sig.BaseSignature; 43 import gnu.java.security.sig.ISignature; 44 import gnu.java.security.sig.ISignatureCodec; 45 import gnu.java.security.sig.SignatureFactory; 46 47 import java.security.InvalidAlgorithmParameterException; 48 import java.security.InvalidKeyException; 49 import java.security.InvalidParameterException; 50 import java.security.PrivateKey; 51 import java.security.PublicKey; 52 import java.security.SecureRandom; 53 import java.security.SignatureException; 54 import java.security.SignatureSpi; 55 import java.security.spec.AlgorithmParameterSpec; 56 import java.util.HashMap; 57 import java.util.logging.Logger; 58 59 /** 60 * The implementation of a generic {@link java.security.Signature} adapter class 61 * to wrap GNU signature instances. 62 * <p> 63 * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for 64 * the {@link java.security.Signature} class, which provides the functionality 65 * of a digital signature algorithm. Digital signatures are used for 66 * authentication and integrity assurance of digital data. 67 * <p> 68 * All the abstract methods in the {@link SignatureSpi} class are implemented by 69 * this class and all its sub-classes. 70 * <p> 71 * All the implementations which subclass this object, and which are serviced by 72 * the GNU provider implement the {@link Cloneable} interface. 73 */ 74 class SignatureAdapter 75 extends SignatureSpi 76 implements Cloneable 77 { 78 private static final Logger log = Configuration.DEBUG ? 79 Logger.getLogger(SignatureAdapter.class.getName()) : null; 80 81 /** Our underlying signature instance. */ 82 private ISignature adaptee; 83 84 /** Our underlying signature encoder/decoder engine. */ 85 private ISignatureCodec codec; 86 87 /** 88 * Trivial protected constructor. 89 * 90 * @param sigName the canonical name of the signature scheme. 91 * @param codec the signature codec engine to use with this scheme. 92 */ SignatureAdapter(String sigName, ISignatureCodec codec)93 protected SignatureAdapter(String sigName, ISignatureCodec codec) 94 { 95 this(SignatureFactory.getInstance(sigName), codec); 96 } 97 98 /** 99 * Private constructor for cloning purposes. 100 * 101 * @param adaptee a clone of the underlying signature scheme instance. 102 * @param codec the signature codec engine to use with this scheme. 103 */ SignatureAdapter(ISignature adaptee, ISignatureCodec codec)104 private SignatureAdapter(ISignature adaptee, ISignatureCodec codec) 105 { 106 super(); 107 108 this.adaptee = adaptee; 109 this.codec = codec; 110 } 111 clone()112 public Object clone() 113 { 114 return new SignatureAdapter((ISignature) adaptee.clone(), codec); 115 } 116 engineInitVerify(PublicKey publicKey)117 public void engineInitVerify(PublicKey publicKey) throws InvalidKeyException 118 { 119 HashMap attributes = new HashMap(); 120 attributes.put(BaseSignature.VERIFIER_KEY, publicKey); 121 try 122 { 123 adaptee.setupVerify(attributes); 124 } 125 catch (IllegalArgumentException x) 126 { 127 throw new InvalidKeyException(x.getMessage(), x); 128 } 129 } 130 engineInitSign(PrivateKey privateKey)131 public void engineInitSign(PrivateKey privateKey) throws InvalidKeyException 132 { 133 HashMap attributes = new HashMap(); 134 attributes.put(BaseSignature.SIGNER_KEY, privateKey); 135 try 136 { 137 adaptee.setupSign(attributes); 138 } 139 catch (IllegalArgumentException x) 140 { 141 throw new InvalidKeyException(x.getMessage(), x); 142 } 143 } 144 engineInitSign(PrivateKey privateKey, SecureRandom random)145 public void engineInitSign(PrivateKey privateKey, SecureRandom random) 146 throws InvalidKeyException 147 { 148 HashMap attributes = new HashMap(); 149 attributes.put(BaseSignature.SIGNER_KEY, privateKey); 150 attributes.put(BaseSignature.SOURCE_OF_RANDOMNESS, random); 151 try 152 { 153 adaptee.setupSign(attributes); 154 } 155 catch (IllegalArgumentException x) 156 { 157 throw new InvalidKeyException(x.getMessage(), x); 158 } 159 } 160 engineUpdate(byte b)161 public void engineUpdate(byte b) throws SignatureException 162 { 163 try 164 { 165 adaptee.update(b); 166 } 167 catch (IllegalStateException x) 168 { 169 throw new SignatureException(x.getMessage(), x); 170 } 171 } 172 engineUpdate(byte[] b, int off, int len)173 public void engineUpdate(byte[] b, int off, int len) 174 throws SignatureException 175 { 176 try 177 { 178 adaptee.update(b, off, len); 179 } 180 catch (IllegalStateException x) 181 { 182 throw new SignatureException(x.getMessage(), x); 183 } 184 } 185 engineSign()186 public byte[] engineSign() throws SignatureException 187 { 188 Object signature = null; 189 try 190 { 191 signature = adaptee.sign(); 192 } 193 catch (IllegalStateException x) 194 { 195 throw new SignatureException(x.getMessage(), x); 196 } 197 byte[] result = codec.encodeSignature(signature); 198 return result; 199 } 200 engineSign(byte[] outbuf, int offset, int len)201 public int engineSign(byte[] outbuf, int offset, int len) 202 throws SignatureException 203 { 204 byte[] signature = this.engineSign(); 205 int result = signature.length; 206 if (result > len) 207 throw new SignatureException("Not enough room to store signature"); 208 209 System.arraycopy(signature, 0, outbuf, offset, result); 210 return result; 211 } 212 engineVerify(byte[] sigBytes)213 public boolean engineVerify(byte[] sigBytes) throws SignatureException 214 { 215 if (Configuration.DEBUG) 216 log.entering(this.getClass().getName(), "engineVerify"); 217 Object signature = codec.decodeSignature(sigBytes); 218 boolean result = false; 219 try 220 { 221 result = adaptee.verify(signature); 222 } 223 catch (IllegalStateException x) 224 { 225 throw new SignatureException(x.getMessage(), x); 226 } 227 if (Configuration.DEBUG) 228 log.exiting(this.getClass().getName(), "engineVerify", 229 Boolean.valueOf(result)); 230 return result; 231 } 232 233 // Deprecated. Replaced by engineSetParameter. engineSetParameter(String param, Object value)234 public void engineSetParameter(String param, Object value) 235 throws InvalidParameterException 236 { 237 throw new InvalidParameterException("deprecated"); 238 } 239 engineSetParameter(AlgorithmParameterSpec params)240 public void engineSetParameter(AlgorithmParameterSpec params) 241 throws InvalidAlgorithmParameterException 242 { 243 } 244 245 // Deprecated engineGetParameter(String param)246 public Object engineGetParameter(String param) 247 throws InvalidParameterException 248 { 249 throw new InvalidParameterException("deprecated"); 250 } 251 } 252