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Diffstat (limited to 'libjava/classpath/gnu/java/security/sig/BaseSignature.java')
| -rw-r--r-- | libjava/classpath/gnu/java/security/sig/BaseSignature.java | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/libjava/classpath/gnu/java/security/sig/BaseSignature.java b/libjava/classpath/gnu/java/security/sig/BaseSignature.java deleted file mode 100644 index ef4d87f261f..00000000000 --- a/libjava/classpath/gnu/java/security/sig/BaseSignature.java +++ /dev/null @@ -1,219 +0,0 @@ -/* BaseSignature.java -- - Copyright (C) 2001, 2002, 2003, 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.sig; - -import gnu.java.security.hash.IMessageDigest; -import gnu.java.security.prng.IRandom; -import gnu.java.security.prng.LimitReachedException; -import gnu.java.security.util.PRNG; - -import java.security.PrivateKey; -import java.security.PublicKey; -import java.util.Map; -import java.util.Random; - -/** - * A base abstract class to facilitate implementations of concrete Signatures. - */ -public abstract class BaseSignature - implements ISignature -{ - /** The canonical name of this signature scheme. */ - protected String schemeName; - - /** The underlying message digest instance for this signature scheme. */ - protected IMessageDigest md; - - /** The public key to use when verifying signatures. */ - protected PublicKey publicKey; - - /** The private key to use when generating signatures (signing). */ - protected PrivateKey privateKey; - - /** The optional {@link Random} instance to use. */ - private Random rnd; - - /** The optional {@link IRandom} instance to use. */ - private IRandom irnd; - - /** Our default source of randomness. */ - private PRNG prng = null; - - /** - * Trivial constructor. - * - * @param schemeName the name of this signature scheme. - * @param md the underlying instance of the message digest algorithm. - * @throws IllegalArgumentException if the designated hash instance is - * <code>null</code>. - */ - protected BaseSignature(String schemeName, IMessageDigest md) - { - super(); - - this.schemeName = schemeName; - if (md == null) - throw new IllegalArgumentException("Message digest MUST NOT be null"); - - this.md = md; - } - - public String name() - { - return schemeName + "-" + md.name(); - } - - public void setupVerify(Map attributes) throws IllegalArgumentException - { - setup(attributes); - // do we have a public key? - PublicKey key = (PublicKey) attributes.get(VERIFIER_KEY); - if (key != null) - setupForVerification(key); - } - - public void setupSign(Map attributes) throws IllegalArgumentException - { - setup(attributes); - // do we have a private key? - PrivateKey key = (PrivateKey) attributes.get(SIGNER_KEY); - if (key != null) - setupForSigning(key); - } - - public void update(byte b) - { - if (md == null) - throw new IllegalStateException(); - - md.update(b); - } - - public void update(byte[] b, int off, int len) - { - if (md == null) - throw new IllegalStateException(); - - md.update(b, off, len); - } - - public Object sign() - { - if (md == null || privateKey == null) - throw new IllegalStateException(); - - return generateSignature(); - } - - public boolean verify(Object sig) - { - if (md == null || publicKey == null) - throw new IllegalStateException(); - - return verifySignature(sig); - } - - public abstract Object clone(); - - protected abstract void setupForVerification(PublicKey key) - throws IllegalArgumentException; - - protected abstract void setupForSigning(PrivateKey key) - throws IllegalArgumentException; - - protected abstract Object generateSignature() throws IllegalStateException; - - protected abstract boolean verifySignature(Object signature) - throws IllegalStateException; - - /** Initialises the internal fields of this instance. */ - protected void init() - { - md.reset(); - rnd = null; - irnd = null; - publicKey = null; - privateKey = null; - } - - /** - * Fills the designated byte array with random data. - * - * @param buffer the byte array to fill with random data. - */ - protected void nextRandomBytes(byte[] buffer) - { - if (rnd != null) - rnd.nextBytes(buffer); - else if (irnd != null) - try - { - irnd.nextBytes(buffer, 0, buffer.length); - } - catch (IllegalStateException x) - { - throw new RuntimeException("nextRandomBytes(): " + x); - } - catch (LimitReachedException x) - { - throw new RuntimeException("nextRandomBytes(): " + x); - } - else - getDefaultPRNG().nextBytes(buffer); - } - - private void setup(Map attributes) - { - init(); - // do we have a Random or SecureRandom, or should we use our own? - Object obj = attributes.get(SOURCE_OF_RANDOMNESS); - if (obj instanceof Random) - rnd = (Random) obj; - else if (obj instanceof IRandom) - irnd = (IRandom) obj; - } - - private PRNG getDefaultPRNG() - { - if (prng == null) - prng = PRNG.getInstance(); - - return prng; - } -} |