support "caching_sha2_password" (mysql 8.0 default)

src/main/java/com/github/shyiko/mysql/binlog/BinaryLogClient.java

@@ -45,8 +45,9 @@
 import com.github.shyiko.mysql.binlog.network.protocol.Packet;
 import com.github.shyiko.mysql.binlog.network.protocol.PacketChannel;
 import com.github.shyiko.mysql.binlog.network.protocol.ResultSetRowPacket;
-import com.github.shyiko.mysql.binlog.network.protocol.command.AuthenticateCommand;
 import com.github.shyiko.mysql.binlog.network.protocol.command.AuthenticateNativePasswordCommand;
+import com.github.shyiko.mysql.binlog.network.protocol.command.AuthenticateSHA2Command;
+import com.github.shyiko.mysql.binlog.network.protocol.command.AuthenticateSecurityPasswordCommand;
 import com.github.shyiko.mysql.binlog.network.protocol.command.Command;
 import com.github.shyiko.mysql.binlog.network.protocol.command.DumpBinaryLogCommand;
 import com.github.shyiko.mysql.binlog.network.protocol.command.DumpBinaryLogGtidCommand;
@@ -715,9 +716,11 @@ private void authenticate(GreetingPacket greetingPacket) throws IOException {
                 usingSSLSocket = true;
             }
         }
-        AuthenticateCommand authenticateCommand = new AuthenticateCommand(schema, username, password,
-            greetingPacket.getScramble());
-        authenticateCommand.setCollation(collation);
+
+        Command authenticateCommand = "caching_sha2_password".equals(greetingPacket.getPluginProvidedData()) ?
+            new AuthenticateSHA2Command(schema, username, password, greetingPacket.getScramble(), collation) :
+            new AuthenticateSecurityPasswordCommand(schema, username, password, greetingPacket.getScramble(), collation);
+
         channel.write(authenticateCommand, packetNumber);
         byte[] authenticationResult = channel.read();
         if (authenticationResult[0] != (byte) 0x00 /* ok */) {
@@ -728,6 +731,14 @@ private void authenticate(GreetingPacket greetingPacket) throws IOException {
                     errorPacket.getSqlState());
             } else if (authenticationResult[0] == (byte) 0xFE) {
                 switchAuthentication(authenticationResult, usingSSLSocket);
+            } else if (authenticationResult[0] == (byte) 0x01) {
+                if (authenticationResult.length >= 2 && (authenticationResult[1] == 3) || (authenticationResult[1] == 4)) {
+                    // 8.0 auth ok
+                    byte[] authenticationResultSha2 = channel.read();
+                    logger.log(Level.FINEST, "SHA2 auth result {0}", authenticationResultSha2);
+                } else {
+                    throw new AuthenticationException("Unexpected authentication result (" + authenticationResult[0] + "&" + authenticationResult[1] + ")");
+                }
             } else {
                 throw new AuthenticationException("Unexpected authentication result (" + authenticationResult[0] + ")");
             }

src/main/java/com/github/shyiko/mysql/binlog/network/ClientCapabilities.java

@@ -42,6 +42,7 @@ public final class ClientCapabilities {
     public static final int MULTI_RESULTS = 1 << 17; /* enable/disable multi-results */
     public static final int PS_MULTI_RESULTS = 1 << 18; /* multi-results in ps-protocol */
     public static final int PLUGIN_AUTH = 1 << 19; /* client supports plugin authentication */
+    public static final int PLUGIN_AUTH_LENENC_CLIENT_DATA = 1 << 21;
     public static final int SSL_VERIFY_SERVER_CERT = 1 << 30;
     public static final int REMEMBER_OPTIONS = 1 << 31;
 

src/main/java/com/github/shyiko/mysql/binlog/network/protocol/command/AuthenticateNativePasswordCommand.java

@@ -29,6 +29,6 @@ public AuthenticateNativePasswordCommand(String scramble, String password) {
     }
     @Override
     public byte[] toByteArray() throws IOException {
-        return AuthenticateCommand.passwordCompatibleWithMySQL411(password, scramble);
+        return AuthenticateSecurityPasswordCommand.passwordCompatibleWithMySQL411(password, scramble);
     }
 }

src/main/java/com/github/shyiko/mysql/binlog/network/protocol/command/AuthenticateSHA2Command.java

@@ -0,0 +1,142 @@
+/*
+ * Copyright 2018 dingxiaobo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.github.shyiko.mysql.binlog.network.protocol.command;
+
+import com.github.shyiko.mysql.binlog.io.ByteArrayOutputStream;
+import com.github.shyiko.mysql.binlog.network.ClientCapabilities;
+
+import java.io.IOException;
+import java.security.DigestException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * @author <a href="mailto:[email protected]">dingxiaobo</a>
+ */
+public class AuthenticateSHA2Command implements Command {
+
+    private String schema;
+    private String username;
+    private String password;
+    private String salt;
+    private int clientCapabilities;
+    private int collation;
+
+    public AuthenticateSHA2Command(String schema, String username, String password, String salt, int collation) {
+        this.schema = schema;
+        this.username = username;
+        this.password = password;
+        this.salt = salt;
+        this.collation = collation;
+    }
+
+    public void setClientCapabilities(int clientCapabilities) {
+        this.clientCapabilities = clientCapabilities;
+    }
+
+    @Override
+    public byte[] toByteArray() throws IOException {
+        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+        int clientCapabilities = this.clientCapabilities;
+        if (clientCapabilities == 0) {
+            clientCapabilities |= ClientCapabilities.LONG_FLAG;
+            clientCapabilities |= ClientCapabilities.PROTOCOL_41;
+            clientCapabilities |= ClientCapabilities.SECURE_CONNECTION;
+            clientCapabilities |= ClientCapabilities.PLUGIN_AUTH;
+            clientCapabilities |= ClientCapabilities.PLUGIN_AUTH_LENENC_CLIENT_DATA;
+
+            if (schema != null) {
+                clientCapabilities |= ClientCapabilities.CONNECT_WITH_DB;
+            }
+        }
+        buffer.writeInteger(clientCapabilities, 4);
+        buffer.writeInteger(0, 4); // maximum packet length
+        buffer.writeInteger(collation, 1);
+        for (int i = 0; i < 23; i++) {
+            buffer.write(0);
+        }
+        buffer.writeZeroTerminatedString(username);
+        byte[] passwordSHA1 = encodePassword();
+        buffer.writeInteger(passwordSHA1.length, 1);
+        buffer.write(passwordSHA1);
+        if (schema != null) {
+            buffer.writeZeroTerminatedString(schema);
+        }
+        buffer.writeZeroTerminatedString("caching_sha2_password");
+
+        return buffer.toByteArray();
+    }
+
+    private byte[] encodePassword() {
+        if (password == null || "".equals(password)) {
+            return new byte[0];
+        }
+        // caching_sha2_password
+        /*
+         * Server does it in 4 steps (see sql/auth/sha2_password_common.cc Generate_scramble::scramble method):
+         *
+         * SHA2(src) => digest_stage1
+         * SHA2(digest_stage1) => digest_stage2
+         * SHA2(digest_stage2, m_rnd) => scramble_stage1
+         * XOR(digest_stage1, scramble_stage1) => scramble
+         */
+        MessageDigest md;
+        try {
+            md = MessageDigest.getInstance("SHA-256");
+
+            int CACHING_SHA2_DIGEST_LENGTH = 32;
+            byte[] dig1 = new byte[CACHING_SHA2_DIGEST_LENGTH];
+            byte[] dig2 = new byte[CACHING_SHA2_DIGEST_LENGTH];
+            byte[] scramble1 = new byte[CACHING_SHA2_DIGEST_LENGTH];
+
+            // SHA2(src) => digest_stage1
+            md.update(password.getBytes(), 0, password.getBytes().length);
+            md.digest(dig1, 0, CACHING_SHA2_DIGEST_LENGTH);
+            md.reset();
+
+            // SHA2(digest_stage1) => digest_stage2
+            md.update(dig1, 0, dig1.length);
+            md.digest(dig2, 0, CACHING_SHA2_DIGEST_LENGTH);
+            md.reset();
+
+            // SHA2(digest_stage2, m_rnd) => scramble_stage1
+            md.update(dig2, 0, dig1.length);
+            md.update(salt.getBytes(), 0, salt.getBytes().length);
+            md.digest(scramble1, 0, CACHING_SHA2_DIGEST_LENGTH);
+
+            // XOR(digest_stage1, scramble_stage1) => scramble
+            byte[] mysqlScrambleBuff = new byte[CACHING_SHA2_DIGEST_LENGTH];
+            xor(dig1, mysqlScrambleBuff, scramble1, CACHING_SHA2_DIGEST_LENGTH);
+
+            return mysqlScrambleBuff;
+        } catch (NoSuchAlgorithmException ex) {
+            throw new RuntimeException(ex);
+        } catch (DigestException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private void xor(byte[] from, byte[] to, byte[] scramble, int length) {
+        int pos = 0;
+        int scrambleLength = scramble.length;
+
+        while (pos < length) {
+            to[pos] = (byte) (from[pos] ^ scramble[pos % scrambleLength]);
+            pos++;
+        }
+    }
+
+}

src/main/java/com/github/shyiko/mysql/binlog/network/protocol/command/AuthenticateCommand.java → src/main/java/com/github/shyiko/mysql/binlog/network/protocol/command/AuthenticateSecurityPasswordCommand.java

@@ -25,7 +25,7 @@
 /**
  * @author <a href="mailto:[email protected]">Stanley Shyiko</a>
  */
-public class AuthenticateCommand implements Command {
+public class AuthenticateSecurityPasswordCommand implements Command {
 
     private String schema;
     private String username;
@@ -34,11 +34,12 @@ public class AuthenticateCommand implements Command {
     private int clientCapabilities;
     private int collation;
 
-    public AuthenticateCommand(String schema, String username, String password, String salt) {
+    public AuthenticateSecurityPasswordCommand(String schema, String username, String password, String salt, int collation) {
         this.schema = schema;
         this.username = username;
         this.password = password;
         this.salt = salt;
+        this.collation = collation;
     }
 
     public void setClientCapabilities(int clientCapabilities) {