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Diffstat (limited to 'libjava/classpath/gnu/java/security/key/dss/DSSPublicKey.java')
| -rw-r--r-- | libjava/classpath/gnu/java/security/key/dss/DSSPublicKey.java | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/libjava/classpath/gnu/java/security/key/dss/DSSPublicKey.java b/libjava/classpath/gnu/java/security/key/dss/DSSPublicKey.java deleted file mode 100644 index d7c1afe1517..00000000000 --- a/libjava/classpath/gnu/java/security/key/dss/DSSPublicKey.java +++ /dev/null @@ -1,203 +0,0 @@ -/* DSSPublicKey.java -- - Copyright 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.key.dss; - -import gnu.java.lang.CPStringBuilder; - -import gnu.java.security.Registry; -import gnu.java.security.action.GetPropertyAction; -import gnu.java.security.key.IKeyPairCodec; - -import java.math.BigInteger; -import java.security.AccessController; -import java.security.PublicKey; -import java.security.interfaces.DSAPublicKey; - -/** - * An object that embodies a DSS (Digital Signature Standard) public key. - * - * @see #getEncoded - */ -public class DSSPublicKey - extends DSSKey - implements PublicKey, DSAPublicKey -{ - /** - * <code>y = g<sup>x</sup> mod p</code> where <code>x</code> is the - * private part of the DSA key. - */ - private final BigInteger y; - - /** String representation of this key. Cached for speed. */ - private transient String str; - - /** - * Conveience constructor. Calls the constructor with 5 arguments passing - * {@link Registry#RAW_ENCODING_ID} as the identifier of the preferred - * encoding format. - * - * @param p the public modulus. - * @param q the public prime divisor of <code>p-1</code>. - * @param g a generator of the unique cyclic group <code>Z<sup>*</sup> - * <sub>p</sub></code>. - * @param y the public key part. - */ - public DSSPublicKey(BigInteger p, BigInteger q, BigInteger g, BigInteger y) - { - this(Registry.RAW_ENCODING_ID, p, q, g, y); - } - - /** - * Constructs a new instance of <code>DSSPublicKey</code> given the - * designated arguments. - * - * @param preferredFormat the identifier of the preferred encoding format to - * use when externalizing this key. - * @param p the public modulus. - * @param q the public prime divisor of <code>p-1</code>. - * @param g a generator of the unique cyclic group <code>Z<sup>*</sup> - * <sub>p</sub></code>. - * @param y the public key part. - */ - public DSSPublicKey(int preferredFormat, BigInteger p, BigInteger q, - BigInteger g, BigInteger y) - { - super(preferredFormat == Registry.ASN1_ENCODING_ID ? Registry.X509_ENCODING_ID - : preferredFormat, - p, q, g); - this.y = y; - } - - /** - * A class method that takes the output of the <code>encodePublicKey()</code> - * method of a DSS keypair codec object (an instance implementing - * {@link gnu.java.security.key.IKeyPairCodec} for DSS keys, and re-constructs - * an instance of this object. - * - * @param k the contents of a previously encoded instance of this object. - * @exception ArrayIndexOutOfBoundsException if there is not enough bytes, in - * <code>k</code>, to represent a valid encoding of an - * instance of this object. - * @exception IllegalArgumentException if the byte sequence does not represent - * a valid encoding of an instance of this object. - */ - public static DSSPublicKey valueOf(byte[] k) - { - // try RAW codec - if (k[0] == Registry.MAGIC_RAW_DSS_PUBLIC_KEY[0]) - try - { - return (DSSPublicKey) new DSSKeyPairRawCodec().decodePublicKey(k); - } - catch (IllegalArgumentException ignored) - { - } - // try X.509 codec - return (DSSPublicKey) new DSSKeyPairX509Codec().decodePublicKey(k); - } - - public BigInteger getY() - { - return y; - } - - /** - * Returns the encoded form of this public key according to the designated - * format. - * - * @param format the desired format identifier of the resulting encoding. - * @return the byte sequence encoding this key according to the designated - * format. - * @exception IllegalArgumentException if the format is not supported. - * @see DSSKeyPairRawCodec - */ - public byte[] getEncoded(int format) - { - byte[] result; - switch (format) - { - case IKeyPairCodec.RAW_FORMAT: - result = new DSSKeyPairRawCodec().encodePublicKey(this); - break; - case IKeyPairCodec.X509_FORMAT: - result = new DSSKeyPairX509Codec().encodePublicKey(this); - break; - default: - throw new IllegalArgumentException("Unsupported encoding format: " - + format); - } - return result; - } - - /** - * Returns <code>true</code> if the designated object is an instance of - * {@link DSAPublicKey} and has the same DSS (Digital Signature Standard) - * parameter values as this one. - * - * @param obj the other non-null DSS key to compare to. - * @return <code>true</code> if the designated object is of the same type - * and value as this one. - */ - public boolean equals(Object obj) - { - if (obj == null) - return false; - - if (! (obj instanceof DSAPublicKey)) - return false; - - DSAPublicKey that = (DSAPublicKey) obj; - return super.equals(that) && y.equals(that.getY()); - } - - public String toString() - { - if (str == null) - { - String ls = (String) AccessController.doPrivileged - (new GetPropertyAction("line.separator")); - str = new CPStringBuilder(this.getClass().getName()).append("(") - .append(super.toString()).append(",").append(ls) - .append("y=0x").append(y.toString(16)).append(ls) - .append(")") - .toString(); - } - return str; - } -} |