author | wetmore |
Tue, 26 Aug 2014 17:09:05 -0700 | |
changeset 28543 | 31afdc0e77af |
parent 27804 | 4659e70271c4 |
child 30904 | ec0224270f90 |
permissions | -rw-r--r-- |
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/* |
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8042178: A comment need to go in RSAClientKeyExchange.java
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* Copyright (c) 1996, 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.security.ssl; |
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import java.io.*; |
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import java.security.*; |
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import javax.crypto.*; |
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import javax.net.ssl.*; |
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import sun.security.internal.spec.TlsRsaPremasterSecretParameterSpec; |
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import sun.security.util.KeyUtil; |
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/** |
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* This is the client key exchange message (CLIENT --> SERVER) used with |
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* all RSA key exchanges; it holds the RSA-encrypted pre-master secret. |
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* |
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* The message is encrypted using PKCS #1 block type 02 encryption with the |
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* server's public key. The padding and resulting message size is a function |
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* of this server's public key modulus size, but the pre-master secret is |
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* always exactly 48 bytes. |
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* |
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*/ |
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final class RSAClientKeyExchange extends HandshakeMessage { |
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/* |
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* The following field values were encrypted with the server's public |
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* key (or temp key from server key exchange msg) and are presented |
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* here in DECRYPTED form. |
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*/ |
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private ProtocolVersion protocolVersion; // preMaster [0,1] |
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SecretKey preMaster; |
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private byte[] encrypted; // same size as public modulus |
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/* |
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* Client randomly creates a pre-master secret and encrypts it |
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* using the server's RSA public key; only the server can decrypt |
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* it, using its RSA private key. Result is the same size as the |
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* server's public key, and uses PKCS #1 block format 02. |
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*/ |
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@SuppressWarnings("deprecation") |
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RSAClientKeyExchange(ProtocolVersion protocolVersion, |
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ProtocolVersion maxVersion, |
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SecureRandom generator, PublicKey publicKey) throws IOException { |
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if (publicKey.getAlgorithm().equals("RSA") == false) { |
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throw new SSLKeyException("Public key not of type RSA"); |
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} |
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this.protocolVersion = protocolVersion; |
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try { |
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String s = ((protocolVersion.v >= ProtocolVersion.TLS12.v) ? |
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"SunTls12RsaPremasterSecret" : "SunTlsRsaPremasterSecret"); |
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KeyGenerator kg = JsseJce.getKeyGenerator(s); |
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kg.init(new TlsRsaPremasterSecretParameterSpec( |
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maxVersion.v, protocolVersion.v), generator); |
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preMaster = kg.generateKey(); |
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Cipher cipher = JsseJce.getCipher(JsseJce.CIPHER_RSA_PKCS1); |
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cipher.init(Cipher.WRAP_MODE, publicKey, generator); |
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encrypted = cipher.wrap(preMaster); |
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} catch (GeneralSecurityException e) { |
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throw (SSLKeyException)new SSLKeyException |
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("RSA premaster secret error").initCause(e); |
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} |
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} |
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/* |
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* Server gets the PKCS #1 (block format 02) data, decrypts |
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* it with its private key. |
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*/ |
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@SuppressWarnings("deprecation") |
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RSAClientKeyExchange(ProtocolVersion currentVersion, |
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ProtocolVersion maxVersion, |
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SecureRandom generator, HandshakeInStream input, |
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int messageSize, PrivateKey privateKey) throws IOException { |
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if (privateKey.getAlgorithm().equals("RSA") == false) { |
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throw new SSLKeyException("Private key not of type RSA"); |
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} |
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if (currentVersion.v >= ProtocolVersion.TLS10.v) { |
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encrypted = input.getBytes16(); |
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} else { |
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encrypted = new byte [messageSize]; |
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if (input.read(encrypted) != messageSize) { |
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throw new SSLProtocolException( |
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"SSL: read PreMasterSecret: short read"); |
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} |
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} |
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try { |
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Cipher cipher = JsseJce.getCipher(JsseJce.CIPHER_RSA_PKCS1); |
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cipher.init(Cipher.UNWRAP_MODE, privateKey, |
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new TlsRsaPremasterSecretParameterSpec( |
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maxVersion.v, currentVersion.v), |
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generator); |
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preMaster = (SecretKey)cipher.unwrap(encrypted, |
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"TlsRsaPremasterSecret", Cipher.SECRET_KEY); |
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} catch (InvalidKeyException ibk) { |
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// the message is too big to process with RSA |
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throw new SSLProtocolException( |
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"Unable to process PreMasterSecret, may be too big"); |
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} catch (Exception e) { |
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// unlikely to happen, otherwise, must be a provider exception |
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if (debug != null && Debug.isOn("handshake")) { |
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System.out.println("RSA premaster secret decryption error:"); |
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e.printStackTrace(System.out); |
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} |
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throw new RuntimeException("Could not generate dummy secret", e); |
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} |
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} |
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@Override |
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int messageType() { |
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return ht_client_key_exchange; |
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} |
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@Override |
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int messageLength() { |
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if (protocolVersion.v >= ProtocolVersion.TLS10.v) { |
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return encrypted.length + 2; |
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} else { |
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return encrypted.length; |
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} |
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} |
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@Override |
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void send(HandshakeOutStream s) throws IOException { |
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if (protocolVersion.v >= ProtocolVersion.TLS10.v) { |
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s.putBytes16(encrypted); |
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} else { |
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s.write(encrypted); |
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} |
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} |
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@Override |
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void print(PrintStream s) throws IOException { |
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s.println("*** ClientKeyExchange, RSA PreMasterSecret, " + |
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protocolVersion); |
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} |
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} |