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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/security/jce/sig/SignatureAdapter.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/security/jce/sig/SignatureAdapter.java')
-rw-r--r-- | libjava/classpath/gnu/java/security/jce/sig/SignatureAdapter.java | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/security/jce/sig/SignatureAdapter.java b/libjava/classpath/gnu/java/security/jce/sig/SignatureAdapter.java new file mode 100644 index 000000000..0ed1e2f41 --- /dev/null +++ b/libjava/classpath/gnu/java/security/jce/sig/SignatureAdapter.java @@ -0,0 +1,250 @@ +/* SignatureAdapter.java -- + Copyright 2001, 2002, 2006 Free Software Foundation, Inc. + +This file is a part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or (at +your option) any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 +USA + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.security.jce.sig; + +import gnu.java.security.Configuration; +import gnu.java.security.sig.BaseSignature; +import gnu.java.security.sig.ISignature; +import gnu.java.security.sig.ISignatureCodec; +import gnu.java.security.sig.SignatureFactory; + +import java.security.InvalidAlgorithmParameterException; +import java.security.InvalidKeyException; +import java.security.InvalidParameterException; +import java.security.PrivateKey; +import java.security.PublicKey; +import java.security.SecureRandom; +import java.security.SignatureException; +import java.security.SignatureSpi; +import java.security.spec.AlgorithmParameterSpec; +import java.util.HashMap; +import java.util.logging.Logger; + +/** + * The implementation of a generic {@link java.security.Signature} adapter class + * to wrap GNU signature instances. + * <p> + * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for + * the {@link java.security.Signature} class, which provides the functionality + * of a digital signature algorithm. Digital signatures are used for + * authentication and integrity assurance of digital data. + * <p> + * All the abstract methods in the {@link SignatureSpi} class are implemented by + * this class and all its sub-classes. + * <p> + * All the implementations which subclass this object, and which are serviced by + * the GNU provider implement the {@link Cloneable} interface. + */ +class SignatureAdapter + extends SignatureSpi + implements Cloneable +{ + private static final Logger log = Logger.getLogger(SignatureAdapter.class.getName()); + + /** Our underlying signature instance. */ + private ISignature adaptee; + + /** Our underlying signature encoder/decoder engine. */ + private ISignatureCodec codec; + + /** + * Trivial protected constructor. + * + * @param sigName the canonical name of the signature scheme. + * @param codec the signature codec engine to use with this scheme. + */ + protected SignatureAdapter(String sigName, ISignatureCodec codec) + { + this(SignatureFactory.getInstance(sigName), codec); + } + + /** + * Private constructor for cloning purposes. + * + * @param adaptee a clone of the underlying signature scheme instance. + * @param codec the signature codec engine to use with this scheme. + */ + private SignatureAdapter(ISignature adaptee, ISignatureCodec codec) + { + super(); + + this.adaptee = adaptee; + this.codec = codec; + } + + public Object clone() + { + return new SignatureAdapter((ISignature) adaptee.clone(), codec); + } + + public void engineInitVerify(PublicKey publicKey) throws InvalidKeyException + { + HashMap attributes = new HashMap(); + attributes.put(BaseSignature.VERIFIER_KEY, publicKey); + try + { + adaptee.setupVerify(attributes); + } + catch (IllegalArgumentException x) + { + throw new InvalidKeyException(x.getMessage(), x); + } + } + + public void engineInitSign(PrivateKey privateKey) throws InvalidKeyException + { + HashMap attributes = new HashMap(); + attributes.put(BaseSignature.SIGNER_KEY, privateKey); + try + { + adaptee.setupSign(attributes); + } + catch (IllegalArgumentException x) + { + throw new InvalidKeyException(x.getMessage(), x); + } + } + + public void engineInitSign(PrivateKey privateKey, SecureRandom random) + throws InvalidKeyException + { + HashMap attributes = new HashMap(); + attributes.put(BaseSignature.SIGNER_KEY, privateKey); + attributes.put(BaseSignature.SOURCE_OF_RANDOMNESS, random); + try + { + adaptee.setupSign(attributes); + } + catch (IllegalArgumentException x) + { + throw new InvalidKeyException(x.getMessage(), x); + } + } + + public void engineUpdate(byte b) throws SignatureException + { + try + { + adaptee.update(b); + } + catch (IllegalStateException x) + { + throw new SignatureException(x.getMessage(), x); + } + } + + public void engineUpdate(byte[] b, int off, int len) + throws SignatureException + { + try + { + adaptee.update(b, off, len); + } + catch (IllegalStateException x) + { + throw new SignatureException(x.getMessage(), x); + } + } + + public byte[] engineSign() throws SignatureException + { + Object signature = null; + try + { + signature = adaptee.sign(); + } + catch (IllegalStateException x) + { + throw new SignatureException(x.getMessage(), x); + } + byte[] result = codec.encodeSignature(signature); + return result; + } + + public int engineSign(byte[] outbuf, int offset, int len) + throws SignatureException + { + byte[] signature = this.engineSign(); + int result = signature.length; + if (result > len) + throw new SignatureException("Not enough room to store signature"); + + System.arraycopy(signature, 0, outbuf, offset, result); + return result; + } + + public boolean engineVerify(byte[] sigBytes) throws SignatureException + { + if (Configuration.DEBUG) + log.entering(this.getClass().getName(), "engineVerify"); + Object signature = codec.decodeSignature(sigBytes); + boolean result = false; + try + { + result = adaptee.verify(signature); + } + catch (IllegalStateException x) + { + throw new SignatureException(x.getMessage(), x); + } + if (Configuration.DEBUG) + log.exiting(this.getClass().getName(), "engineVerify", + Boolean.valueOf(result)); + return result; + } + + // Deprecated. Replaced by engineSetParameter. + public void engineSetParameter(String param, Object value) + throws InvalidParameterException + { + throw new InvalidParameterException("deprecated"); + } + + public void engineSetParameter(AlgorithmParameterSpec params) + throws InvalidAlgorithmParameterException + { + } + + // Deprecated + public Object engineGetParameter(String param) + throws InvalidParameterException + { + throw new InvalidParameterException("deprecated"); + } +} |