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2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
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0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
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0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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0N/A */
0N/A
0N/Apackage sun.security.rsa;
0N/A
0N/Aimport java.io.IOException;
0N/Aimport java.math.BigInteger;
0N/A
0N/Aimport java.security.*;
0N/Aimport java.security.interfaces.*;
0N/A
0N/Aimport sun.security.util.*;
0N/Aimport sun.security.x509.X509Key;
0N/A
0N/A/**
0N/A * Key implementation for RSA public keys.
0N/A *
0N/A * Note: RSA keys must be at least 512 bits long
0N/A *
0N/A * @see RSAPrivateCrtKeyImpl
0N/A * @see RSAKeyFactory
0N/A *
0N/A * @since 1.5
0N/A * @author Andreas Sterbenz
0N/A */
0N/Apublic final class RSAPublicKeyImpl extends X509Key implements RSAPublicKey {
0N/A
0N/A private static final long serialVersionUID = 2644735423591199609L;
0N/A
0N/A private BigInteger n; // modulus
0N/A private BigInteger e; // public exponent
0N/A
0N/A /**
0N/A * Construct a key from its components. Used by the
0N/A * RSAKeyFactory and the RSAKeyPairGenerator.
0N/A */
1111N/A public RSAPublicKeyImpl(BigInteger n, BigInteger e)
1111N/A throws InvalidKeyException {
0N/A this.n = n;
0N/A this.e = e;
1111N/A RSAKeyFactory.checkRSAProviderKeyLengths(n.bitLength(), e);
0N/A // generate the encoding
0N/A algid = RSAPrivateCrtKeyImpl.rsaId;
0N/A try {
0N/A DerOutputStream out = new DerOutputStream();
0N/A out.putInteger(n);
0N/A out.putInteger(e);
0N/A DerValue val =
0N/A new DerValue(DerValue.tag_Sequence, out.toByteArray());
0N/A key = val.toByteArray();
0N/A } catch (IOException exc) {
0N/A // should never occur
0N/A throw new InvalidKeyException(exc);
0N/A }
0N/A }
0N/A
0N/A /**
0N/A * Construct a key from its encoding. Used by RSAKeyFactory.
0N/A */
0N/A public RSAPublicKeyImpl(byte[] encoded) throws InvalidKeyException {
0N/A decode(encoded);
1111N/A RSAKeyFactory.checkRSAProviderKeyLengths(n.bitLength(), e);
0N/A }
0N/A
0N/A // see JCA doc
0N/A public String getAlgorithm() {
0N/A return "RSA";
0N/A }
0N/A
0N/A // see JCA doc
0N/A public BigInteger getModulus() {
0N/A return n;
0N/A }
0N/A
0N/A // see JCA doc
0N/A public BigInteger getPublicExponent() {
0N/A return e;
0N/A }
0N/A
0N/A /**
0N/A * Parse the key. Called by X509Key.
0N/A */
0N/A protected void parseKeyBits() throws InvalidKeyException {
0N/A try {
0N/A DerInputStream in = new DerInputStream(key);
0N/A DerValue derValue = in.getDerValue();
0N/A if (derValue.tag != DerValue.tag_Sequence) {
0N/A throw new IOException("Not a SEQUENCE");
0N/A }
0N/A DerInputStream data = derValue.data;
0N/A n = RSAPrivateCrtKeyImpl.getBigInteger(data);
0N/A e = RSAPrivateCrtKeyImpl.getBigInteger(data);
0N/A if (derValue.data.available() != 0) {
0N/A throw new IOException("Extra data available");
0N/A }
0N/A } catch (IOException e) {
0N/A throw new InvalidKeyException("Invalid RSA public key", e);
0N/A }
0N/A }
0N/A
0N/A // return a string representation of this key for debugging
0N/A public String toString() {
0N/A return "Sun RSA public key, " + n.bitLength() + " bits\n modulus: "
0N/A + n + "\n public exponent: " + e;
0N/A }
0N/A
0N/A protected Object writeReplace() throws java.io.ObjectStreamException {
0N/A return new KeyRep(KeyRep.Type.PUBLIC,
0N/A getAlgorithm(),
0N/A getFormat(),
0N/A getEncoded());
0N/A }
0N/A}