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/*
* Copyright (c) 2012, 2020, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* This program 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 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj.protocol.a.authentication;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.List;
import com.mysql.cj.Messages;
import com.mysql.cj.conf.PropertyKey;
import com.mysql.cj.conf.PropertySet;
import com.mysql.cj.conf.RuntimeProperty;
import com.mysql.cj.exceptions.CJException;
import com.mysql.cj.exceptions.ExceptionFactory;
import com.mysql.cj.exceptions.ExceptionInterceptor;
import com.mysql.cj.exceptions.UnableToConnectException;
import com.mysql.cj.exceptions.WrongArgumentException;
import com.mysql.cj.protocol.AuthenticationPlugin;
import com.mysql.cj.protocol.ExportControlled;
import com.mysql.cj.protocol.Protocol;
import com.mysql.cj.protocol.Security;
import com.mysql.cj.protocol.a.NativeConstants;
import com.mysql.cj.protocol.a.NativeConstants.IntegerDataType;
import com.mysql.cj.protocol.a.NativeConstants.StringSelfDataType;
import com.mysql.cj.protocol.a.NativePacketPayload;
import com.mysql.cj.util.StringUtils;
public class Sha256PasswordPlugin implements AuthenticationPlugin {
public static String PLUGIN_NAME = "sha256_password";
protected Protocol protocol;
protected String password = null;
protected String seed = null;
protected boolean publicKeyRequested = false;
protected String publicKeyString = null;
protected RuntimeProperty serverRSAPublicKeyFile = null;
@Override
public void init(Protocol prot) {
this.protocol = prot;
this.serverRSAPublicKeyFile = this.protocol.getPropertySet().getStringProperty(PropertyKey.serverRSAPublicKeyFile);
String pkURL = this.serverRSAPublicKeyFile.getValue();
if (pkURL != null) {
this.publicKeyString = readRSAKey(pkURL, this.protocol.getPropertySet(), this.protocol.getExceptionInterceptor());
}
}
public void destroy() {
this.password = null;
this.seed = null;
this.publicKeyRequested = false;
}
public String getProtocolPluginName() {
return PLUGIN_NAME;
}
public boolean requiresConfidentiality() {
return false;
}
public boolean isReusable() {
return true;
}
public void setAuthenticationParameters(String user, String password) {
this.password = password;
}
public boolean nextAuthenticationStep(NativePacketPayload fromServer, List toServer) {
toServer.clear();
if (this.password == null || this.password.length() == 0 || fromServer == null) {
// no password
NativePacketPayload bresp = new NativePacketPayload(new byte[] { 0 });
toServer.add(bresp);
} else {
try {
if (this.protocol.getSocketConnection().isSSLEstablished()) {
// allow plain text over SSL
NativePacketPayload bresp = new NativePacketPayload(StringUtils.getBytes(this.password, this.protocol.getPasswordCharacterEncoding()));
bresp.setPosition(bresp.getPayloadLength());
bresp.writeInteger(IntegerDataType.INT1, 0);
bresp.setPosition(0);
toServer.add(bresp);
} else if (this.serverRSAPublicKeyFile.getValue() != null) {
// encrypt with given key, don't use "Public Key Retrieval"
this.seed = fromServer.readString(StringSelfDataType.STRING_TERM, null);
NativePacketPayload bresp = new NativePacketPayload(encryptPassword());
toServer.add(bresp);
} else {
if (!this.protocol.getPropertySet().getBooleanProperty(PropertyKey.allowPublicKeyRetrieval).getValue()) {
throw ExceptionFactory.createException(UnableToConnectException.class, Messages.getString("Sha256PasswordPlugin.2"),
this.protocol.getExceptionInterceptor());
}
// We must request the public key from the server to encrypt the password
if (this.publicKeyRequested && fromServer.getPayloadLength() > NativeConstants.SEED_LENGTH) {
// Servers affected by Bug#70865 could send Auth Switch instead of key after Public Key Retrieval,
// so we check payload length to detect that.
// read key response
this.publicKeyString = fromServer.readString(StringSelfDataType.STRING_TERM, null);
NativePacketPayload bresp = new NativePacketPayload(encryptPassword());
toServer.add(bresp);
this.publicKeyRequested = false;
} else {
// build and send Public Key Retrieval packet
this.seed = fromServer.readString(StringSelfDataType.STRING_TERM, null);
NativePacketPayload bresp = new NativePacketPayload(new byte[] { 1 });
toServer.add(bresp);
this.publicKeyRequested = true;
}
}
} catch (CJException e) {
throw ExceptionFactory.createException(e.getMessage(), e, this.protocol.getExceptionInterceptor());
}
}
return true;
}
protected byte[] encryptPassword() {
return encryptPassword("RSA/ECB/OAEPWithSHA-1AndMGF1Padding");
}
protected byte[] encryptPassword(String transformation) {
byte[] input = null;
input = this.password != null ? StringUtils.getBytesNullTerminated(this.password, this.protocol.getPasswordCharacterEncoding()) : new byte[] { 0 };
byte[] mysqlScrambleBuff = new byte[input.length];
Security.xorString(input, mysqlScrambleBuff, this.seed.getBytes(), input.length);
return ExportControlled.encryptWithRSAPublicKey(mysqlScrambleBuff, ExportControlled.decodeRSAPublicKey(this.publicKeyString), transformation);
}
protected static String readRSAKey(String pkPath, PropertySet propertySet, ExceptionInterceptor exceptionInterceptor) {
String res = null;
byte[] fileBuf = new byte[2048];
BufferedInputStream fileIn = null;
try {
File f = new File(pkPath);
String canonicalPath = f.getCanonicalPath();
fileIn = new BufferedInputStream(new FileInputStream(canonicalPath));
int bytesRead = 0;
StringBuilder sb = new StringBuilder();
while ((bytesRead = fileIn.read(fileBuf)) != -1) {
sb.append(StringUtils.toAsciiString(fileBuf, 0, bytesRead));
}
res = sb.toString();
} catch (IOException ioEx) {
throw ExceptionFactory.createException(WrongArgumentException.class,
Messages.getString("Sha256PasswordPlugin.0",
propertySet.getBooleanProperty(PropertyKey.paranoid).getValue() ? new Object[] { "" } : new Object[] { "'" + pkPath + "'" }),
exceptionInterceptor);
} finally {
if (fileIn != null) {
try {
fileIn.close();
} catch (IOException e) {
throw ExceptionFactory.createException(Messages.getString("Sha256PasswordPlugin.1"), e, exceptionInterceptor);
}
}
}
return res;
}
}
