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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/key/rsa/GnuRSAKey.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/security/key/rsa/GnuRSAKey.java')
-rw-r--r-- | libjava/classpath/gnu/java/security/key/rsa/GnuRSAKey.java | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/security/key/rsa/GnuRSAKey.java b/libjava/classpath/gnu/java/security/key/rsa/GnuRSAKey.java new file mode 100644 index 000000000..38530ee4c --- /dev/null +++ b/libjava/classpath/gnu/java/security/key/rsa/GnuRSAKey.java @@ -0,0 +1,178 @@ +/* GnuRSAKey.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.rsa; + +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.RSAKey; + +/** + * A base asbtract class for both public and private RSA keys. + */ +public abstract class GnuRSAKey + implements Key, RSAKey +{ + /** The public modulus of an RSA key pair. */ + private final BigInteger n; + + /** The public exponent of an RSA key pair. */ + private final BigInteger e; + + /** + * 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 n the public modulus <code>n</code>. + * @param e the public exponent <code>e</code>. + */ + protected GnuRSAKey(int defaultFormat, BigInteger n, BigInteger e) + { + super(); + + this.defaultFormat = defaultFormat <= 0 ? Registry.RAW_ENCODING_ID + : defaultFormat; + this.n = n; + this.e = e; + } + + public BigInteger getModulus() + { + return getN(); + } + + public String getAlgorithm() + { + return Registry.RSA_KPG; + } + + /** @deprecated see getEncoded(int). */ + public byte[] getEncoded() + { + return getEncoded(defaultFormat); + } + + public String getFormat() + { + return FormatUtil.getEncodingShortName(defaultFormat); + } + + /** + * Returns the modulus <code>n</code>. + * + * @return the modulus <code>n</code>. + */ + public BigInteger getN() + { + return n; + } + + /** + * Returns the public exponent <code>e</code>. + * + * @return the public exponent <code>e</code>. + */ + public BigInteger getPublicExponent() + { + return getE(); + } + + /** + * Same as {@link #getPublicExponent()}. + * + * @return the public exponent <code>e</code>. + */ + public BigInteger getE() + { + return e; + } + + /** + * Returns <code>true</code> if the designated object is an instance of + * {@link RSAKey} and has the same RSA parameter values as this one. + * + * @param obj the other non-null RSA 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(final Object obj) + { + if (obj == null) + return false; + + if (! (obj instanceof RSAKey)) + return false; + + final RSAKey that = (RSAKey) obj; + return n.equals(that.getModulus()); + } + + public String toString() + { + if (str == null) + { + String ls = (String) AccessController.doPrivileged + (new GetPropertyAction("line.separator")); + str = new CPStringBuilder(ls) + .append("defaultFormat=").append(defaultFormat).append(",").append(ls) + .append("n=0x").append(n.toString(16)).append(",").append(ls) + .append("e=0x").append(e.toString(16)) + .toString(); + } + return str; + } + + public abstract byte[] getEncoded(int format); +} |