/* * Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package sun.security.rsa;import java.io.IOException;import java.math.BigInteger;import java.security.*;import java.security.interfaces.*;import sun.security.util.*;import sun.security.x509.X509Key;/** * Key implementation for RSA public keys. * * Note: RSA keys must be at least 512 bits long * * @see RSAPrivateCrtKeyImpl * @see RSAKeyFactory * * @since 1.5 * @author Andreas Sterbenz */public final class RSAPublicKeyImpl extends X509Key implements RSAPublicKey { private static final long serialVersionUID = 2644735423591199609L; private BigInteger n; // modulus private BigInteger e; // public exponent /** * Construct a key from its components. Used by the * RSAKeyFactory and the RSAKeyPairGenerator. */ public RSAPublicKeyImpl(BigInteger n, BigInteger e) throws InvalidKeyException { this.n = n; this.e = e; RSAKeyFactory.checkRSAProviderKeyLengths(n.bitLength(), e); // generate the encoding algid = RSAPrivateCrtKeyImpl.rsaId; try { DerOutputStream out = new DerOutputStream(); out.putInteger(n); out.putInteger(e); DerValue val = new DerValue(DerValue.tag_Sequence, out.toByteArray()); key = val.toByteArray(); } catch (IOException exc) { // should never occur throw new InvalidKeyException(exc); } } /** * Construct a key from its encoding. Used by RSAKeyFactory. */ public RSAPublicKeyImpl(byte[] encoded) throws InvalidKeyException { decode(encoded); RSAKeyFactory.checkRSAProviderKeyLengths(n.bitLength(), e); } // see JCA doc public String getAlgorithm() { return "RSA"; } // see JCA doc public BigInteger getModulus() { return n; } // see JCA doc public BigInteger getPublicExponent() { return e; } /** * Parse the key. Called by X509Key. */ protected void parseKeyBits() throws InvalidKeyException { try { DerInputStream in = new DerInputStream(key); DerValue derValue = in.getDerValue(); if (derValue.tag != DerValue.tag_Sequence) { throw new IOException("Not a SEQUENCE"); } DerInputStream data = derValue.data; n = RSAPrivateCrtKeyImpl.getBigInteger(data); e = RSAPrivateCrtKeyImpl.getBigInteger(data); if (derValue.data.available() != 0) { throw new IOException("Extra data available"); } } catch (IOException e) { throw new InvalidKeyException("Invalid RSA public key", e); } } // return a string representation of this key for debugging public String toString() { return "Sun RSA public key, " + n.bitLength() + " bits\n modulus: " + n + "\n public exponent: " + e; } protected Object writeReplace() throws java.io.ObjectStreamException { return new KeyRep(KeyRep.Type.PUBLIC, getAlgorithm(), getFormat(), getEncoded()); }}
/*
* Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.security.rsa;
import java.io.IOException;
import java.math.BigInteger;
import java.security.*;
import java.security.interfaces.*;
import sun.security.util.*;
import sun.security.x509.X509Key;
/**
* Key implementation for RSA public keys.
*
* Note: RSA keys must be at least 512 bits long
*
* @see RSAPrivateCrtKeyImpl
* @see RSAKeyFactory
*
* @since 1.5
* @author Andreas Sterbenz
*/
public final class RSAPublicKeyImpl extends X509Key implements RSAPublicKey {
private static final long serialVersionUID = 2644735423591199609L;
private BigInteger n; // modulus
private BigInteger e; // public exponent
/**
* Construct a key from its components. Used by the
* RSAKeyFactory and the RSAKeyPairGenerator.
*/
public RSAPublicKeyImpl(BigInteger n, BigInteger e)
throws InvalidKeyException {
this.n = n;
this.e = e;
RSAKeyFactory.checkRSAProviderKeyLengths(n.bitLength(), e);
// generate the encoding
algid = RSAPrivateCrtKeyImpl.rsaId;
try {
DerOutputStream out = new DerOutputStream();
out.putInteger(n);
out.putInteger(e);
DerValue val =
new DerValue(DerValue.tag_Sequence, out.toByteArray());
key = val.toByteArray();
} catch (IOException exc) {
// should never occur
throw new InvalidKeyException(exc);
}
}
/**
* Construct a key from its encoding. Used by RSAKeyFactory.
*/
public RSAPublicKeyImpl(byte[] encoded) throws InvalidKeyException {
decode(encoded);
RSAKeyFactory.checkRSAProviderKeyLengths(n.bitLength(), e);
}
// see JCA doc
public String getAlgorithm() {
return "RSA";
}
// see JCA doc
public BigInteger getModulus() {
return n;
}
// see JCA doc
public BigInteger getPublicExponent() {
return e;
}
/**
* Parse the key. Called by X509Key.
*/
protected void parseKeyBits() throws InvalidKeyException {
try {
DerInputStream in = new DerInputStream(key);
DerValue derValue = in.getDerValue();
if (derValue.tag != DerValue.tag_Sequence) {
throw new IOException("Not a SEQUENCE");
}
DerInputStream data = derValue.data;
n = RSAPrivateCrtKeyImpl.getBigInteger(data);
e = RSAPrivateCrtKeyImpl.getBigInteger(data);
if (derValue.data.available() != 0) {
throw new IOException("Extra data available");
}
} catch (IOException e) {
throw new InvalidKeyException("Invalid RSA public key", e);
}
}
// return a string representation of this key for debugging
public String toString() {
return "Sun RSA public key, " + n.bitLength() + " bits\n modulus: "
+ n + "\n public exponent: " + e;
}
protected Object writeReplace() throws java.io.ObjectStreamException {
return new KeyRep(KeyRep.Type.PUBLIC,
getAlgorithm(),
getFormat(),
getEncoded());
}
}