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Diffstat (limited to 'libjava/classpath/gnu/java/security/key/dss/DSSKey.java')
| -rw-r--r-- | libjava/classpath/gnu/java/security/key/dss/DSSKey.java | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/libjava/classpath/gnu/java/security/key/dss/DSSKey.java b/libjava/classpath/gnu/java/security/key/dss/DSSKey.java deleted file mode 100644 index 49f229f7b2b..00000000000 --- a/libjava/classpath/gnu/java/security/key/dss/DSSKey.java +++ /dev/null @@ -1,213 +0,0 @@ -/* DSSKey.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.util.FormatUtil; - -import java.math.BigInteger; -import java.security.AccessController; -import java.security.Key; -import java.security.interfaces.DSAKey; -import java.security.interfaces.DSAParams; -import java.security.spec.DSAParameterSpec; - -/** - * A base asbtract class for both public and private DSS (Digital Signature - * Standard) keys. It encapsulates the three DSS numbers: <code>p</code>, - * <code>q</code> and <code>g</code>. - * <p> - * According to the JDK, cryptographic <i>Keys</i> all have a <i>format</i>. - * The format used in this implementation is called <i>Raw</i>, and basically - * consists of the raw byte sequences of algorithm parameters. The exact order - * of the byte sequences and the implementation details are given in each of the - * relevant <code>getEncoded()</code> methods of each of the private and - * public keys. - * <p> - * <b>IMPORTANT</b>: Under certain circumstances (e.g. in an X.509 certificate - * with inherited AlgorithmIdentifier's parameters of a SubjectPublicKeyInfo - * element) these three MPIs may be <code>null</code>. - * - * @see DSSPrivateKey#getEncoded - * @see DSSPublicKey#getEncoded - */ -public abstract class DSSKey - implements Key, DSAKey -{ - /** - * A prime modulus, where - * <code>2<sup>L-1</sup> < p < 2<sup>L</sup></code> for - * <code>512 <= L <= 1024</code> and <code>L</code> a multiple of - * <code>64</code>. - */ - protected final BigInteger p; - - /** - * A prime divisor of <code>p - 1</code>, where - * <code>2<sup>159</sup> < q - * < 2<sup>160</sup></code>. - */ - protected final BigInteger q; - - /** - * <code>g = h<sup>(p-1)</sup>/q mod p</code>, where <code>h</code> is - * any integer with <code>1 < h < p - 1</code> such that <code>h<sup> - * (p-1)</sup>/q mod p > 1</code> (<code>g</code> - * has order <code>q mod p - * </code>). - */ - protected final BigInteger g; - - /** - * Identifier of the default encoding format to use when externalizing the key - * material. - */ - protected final int defaultFormat; - - /** String representation of this key. Cached for speed. */ - private transient String str; - - /** - * Trivial protected constructor. - * - * @param defaultFormat the identifier of the encoding format to use by - * default when externalizing the key. - * @param p the DSS parameter <code>p</code>. - * @param q the DSS parameter <code>q</code>. - * @param g the DSS parameter <code>g</code>. - */ - protected DSSKey(int defaultFormat, BigInteger p, BigInteger q, BigInteger g) - { - super(); - - this.defaultFormat = defaultFormat <= 0 ? Registry.RAW_ENCODING_ID - : defaultFormat; - this.p = p; - this.q = q; - this.g = g; - } - - public DSAParams getParams() - { - return new DSAParameterSpec(p, q, g); - } - - public String getAlgorithm() - { - return Registry.DSS_KPG; - } - - /** @deprecated see getEncoded(int). */ - public byte[] getEncoded() - { - return getEncoded(defaultFormat); - } - - public String getFormat() - { - return FormatUtil.getEncodingShortName(defaultFormat); - } - - /** - * Returns <code>true</code> if the designated object is an instance of - * {@link DSAKey} and has the same DSS (Digital Signature Standard) parameter - * values as this one. - * <p> - * Always returns <code>false</code> if the MPIs of this key are - * <i>inherited</i>. This may be the case when the key is re-constructed from - * an X.509 certificate with absent or NULL AlgorithmIdentifier's parameters - * field. - * - * @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 (hasInheritedParameters()) - return false; - - if (obj == null) - return false; - - if (! (obj instanceof DSAKey)) - return false; - - DSAKey that = (DSAKey) obj; - return p.equals(that.getParams().getP()) - && q.equals(that.getParams().getQ()) - && g.equals(that.getParams().getG()); - } - - public String toString() - { - if (str == null) - { - String ls = (String) AccessController.doPrivileged(new GetPropertyAction("line.separator")); - CPStringBuilder sb = new CPStringBuilder(ls) - .append("defaultFormat=").append(defaultFormat).append(",") - .append(ls); - if (hasInheritedParameters()) - sb.append("p=inherited,").append(ls) - .append("q=inherited,").append(ls) - .append("g=inherited"); - else - sb.append("p=0x").append(p.toString(16)).append(",").append(ls) - .append("q=0x").append(q.toString(16)).append(",").append(ls) - .append("g=0x").append(g.toString(16)); - str = sb.toString(); - } - return str; - } - - public abstract byte[] getEncoded(int format); - - /** - * @return <code>true</code> if <code>p</code>, <code>q</code> and - * <code>g</code> are all <code>null</code>. Returns - * <code>false</code> otherwise. - */ - public boolean hasInheritedParameters() - { - return p == null && q == null && g == null; - } -} |