>데이터 베이스 >MySQL 튜토리얼 >mysql 프로토콜의 서버 핸드셰이크 패키지에 대한 자세한 소개 및 분석

mysql 프로토콜의 서버 핸드셰이크 패키지에 대한 자세한 소개 및 분석

黄舟
黄舟원래의
2018-05-12 16:41:363156검색

개요

Mysql 클라이언트가 mysql 서버에 로그인하려면 대화형 프로세스가 필요합니다. 여기서는 먼저 서버에서 클라이언트로 전송되는 초기 핸드셰이크 패킷을 살펴보겠습니다. 아래와 같이 클라이언트가 소켓을 통해 서버가 지정한 포트에 연결한 후 서버는 클라이언트에게 초기 핸드셰이크 패킷을 보냅니다. 서버는 다양한 서비스 버전 및 구성에 따라 다양한 초기화 핸드셰이크 패킷을 반환합니다.

client              
server   
|------connect---- >|
   |                   |
   |<----handshake-----|
   |                   |
   |                   |
   |                   |

mysql 통신 메시지 구조

유형 이름 설명 / th>
int5bdf4c78156c7953567bb5a0aef2fc53 페이로드 길이 는 최하위 바이트부터 3에 따라 저장됩니다. 바이트 페이로드와 1바이트 시퀀스 번호는 메시지 헤더로 결합됩니다.
int 일련 번호
类型 名字 描述
int5bdf4c78156c7953567bb5a0aef2fc53 payload长度 按照the least significant byte first存储,3个字节的payload和1个字节的序列号组合成报文头
intf35d6e602fd7d0f0edfa6f7d103c1b57 序列号
string payload 报文体,长度即为前面指定的payload长度
문자열 페이로드 메시지 본문, 길이는 이전에 지정한 페이로드 길이입니다

초기 핸드셰이크 패킷

HandshakeV10 프로토콜은 다음과 같습니다

1              [0a] protocol version
string[NUL]    server version
4              connection id
string[8]      auth-plugin-data-part-1
1              [00] filler
2              capability flags (lower 2 bytes)
  if more data in the packet:
1              character set
2              status flags
2              capability flags (upper 2 bytes)
  if capabilities & CLIENT_PLUGIN_AUTH {
1              length of auth-plugin-data
  } else {
1              [00]
  }
string[10]     reserved (all [00])
  if capabilities & CLIENT_SECURE_CONNECTION {
string[$len]   auth-plugin-data-part-2 ($len=MAX(13, length of auth-plugin-data - 8))
  if capabilities & CLIENT_PLUGIN_AUTH {
    if version >= (5.5.7 and < 5.5.10) or (>= 5.6.0 and < 5.6.2) {
string[EOF]    auth-plugin name
    } elseif version >= 5.5.10 or >= 5.6.2 {
string[NUL]    auth-plugin name
    }
  }

초기 핸드셰이크 패킷 생성

  1. 정의 버전

/**
 * 
 * @author seaboat
 * @date 2016-09-25
 * @version 1.0
 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com
*
<b>blog: </b>http://www.php.cn/;/pre>
 * <p>proxy&#39;s version.</p>
 */public interface Versions {

    byte PROTOCOL_VERSION = 10;    byte[] SERVER_VERSION = "5.6.0-snapshot".getBytes();
}
  1. 난수 도구

/**
 * 
 * @author seaboat
 * @date 2016-09-25
 * @version 1.0
 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com
*
<b>blog: </b>http://www.php.cn/;/pre>
 * <p>a random util .</p>
 */public class RandomUtil {
    private static final byte[] bytes = { &#39;1&#39;, &#39;2&#39;, &#39;3&#39;, &#39;4&#39;, &#39;5&#39;, &#39;6&#39;, &#39;7&#39;,            
    &#39;8&#39;, &#39;9&#39;, &#39;0&#39;, &#39;q&#39;, &#39;w&#39;, &#39;e&#39;, &#39;r&#39;, &#39;t&#39;, &#39;y&#39;, &#39;u&#39;, &#39;i&#39;, &#39;o&#39;, &#39;p&#39;,            
    &#39;a&#39;, &#39;s&#39;, &#39;d&#39;, &#39;f&#39;, &#39;g&#39;, &#39;h&#39;, &#39;j&#39;, &#39;k&#39;, &#39;l&#39;, &#39;z&#39;, &#39;x&#39;, &#39;c&#39;, &#39;v&#39;,            
    &#39;b&#39;, &#39;n&#39;, &#39;m&#39;, &#39;Q&#39;, &#39;W&#39;, &#39;E&#39;, &#39;R&#39;, &#39;T&#39;, &#39;Y&#39;, &#39;U&#39;, &#39;I&#39;, &#39;O&#39;, &#39;P&#39;,            
    &#39;A&#39;, &#39;S&#39;, &#39;D&#39;, &#39;F&#39;, &#39;G&#39;, &#39;H&#39;, &#39;J&#39;, &#39;K&#39;, &#39;L&#39;, &#39;Z&#39;, &#39;X&#39;, &#39;C&#39;, &#39;V&#39;,            
    &#39;B&#39;, &#39;N&#39;, &#39;M&#39; };    
    private static final long multiplier = 0x5DEECE66DL;    
    private static final long addend = 0xBL;    
    private static final long mask = (1L << 48) - 1;    
    private static final long integerMask = (1L << 33) - 1;    
    private static final long seedUniquifier = 8682522807148012L;    
    private static long seed;    
    static {        
    long s = seedUniquifier + System.nanoTime();
        s = (s ^ multiplier) & mask;
        seed = s;
    }    public static final byte[] randomBytes(int size) {        
    byte[] bb = bytes;        
    byte[] ab = new byte[size];        
    for (int i = 0; i < size; i++) {
            ab[i] = randomByte(bb);
        }        return ab;
    }    private static byte randomByte(byte[] b) {        
    int ran = (int) ((next() & integerMask) >>> 16);        
    return b[ran % b.length];
    }    private static long next() {        
    long oldSeed = seed;        
    long nextSeed = 0L;
        do {
            nextSeed = (oldSeed * multiplier + addend) & mask;
        } 
        while (oldSeed == nextSeed);
        seed = nextSeed;        
        return nextSeed;
    }

}
  1. mysql 패키지 기본 클래스

/**
 * 
 * @author seaboat
 * @date 2016-09-25
 * @version 1.0
 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com
*
<b>blog: </b>http://www.php.cn/;/pre>
 * <p>MySQLPacket is mysql&#39;s basic packet.</p>
 */public abstract class MySQLPacket {
    /**
     * none, this is an internal thread state
     */
    public static final byte COM_SLEEP = 0;    /**
     * mysql_close
     */
    public static final byte COM_QUIT = 1;    /**
     * mysql_select_db
     */
    public static final byte COM_INIT_DB = 2;    /**
     * mysql_real_query
     */
    public static final byte COM_QUERY = 3;    /**
     * mysql_list_fields
     */
    public static final byte COM_FIELD_LIST = 4;    /**
     * mysql_create_db (deprecated)
     */
    public static final byte COM_CREATE_DB = 5;    /**
     * mysql_drop_db (deprecated)
     */
    public static final byte COM_DROP_DB = 6;    /**
     * mysql_refresh
     */
    public static final byte COM_REFRESH = 7;    /**
     * mysql_shutdown
     */
    public static final byte COM_SHUTDOWN = 8;    /**
     * mysql_stat
     */
    public static final byte COM_STATISTICS = 9;    /**
     * mysql_list_processes
     */
    public static final byte COM_PROCESS_INFO = 10;    /**
     * none, this is an internal thread state
     */
    public static final byte COM_CONNECT = 11;    /**
     * mysql_kill
     */
    public static final byte COM_PROCESS_KILL = 12;    /**
     * mysql_dump_debug_info
     */
    public static final byte COM_DEBUG = 13;    /**
     * mysql_ping
     */
    public static final byte COM_PING = 14;    /**
     * none, this is an internal thread state
     */
    public static final byte COM_TIME = 15;    /**
     * none, this is an internal thread state
     */
    public static final byte COM_DELAYED_INSERT = 16;    /**
     * mysql_change_user
     */
    public static final byte COM_CHANGE_USER = 17;    /**
     * used by slave server mysqlbinlog
     */
    public static final byte COM_BINLOG_DUMP = 18;    /**
     * used by slave server to get master table
     */
    public static final byte COM_TABLE_DUMP = 19;    /**
     * used by slave to log connection to master
     */
    public static final byte COM_CONNECT_OUT = 20;    /**
     * used by slave to register to master
     */
    public static final byte COM_REGISTER_SLAVE = 21;    /**
     * mysql_stmt_prepare
     */
    public static final byte COM_STMT_PREPARE = 22;    /**
     * mysql_stmt_execute
     */
    public static final byte COM_STMT_EXECUTE = 23;    /**
     * mysql_stmt_send_long_data
     */
    public static final byte COM_STMT_SEND_LONG_DATA = 24;    /**
     * mysql_stmt_close
     */
    public static final byte COM_STMT_CLOSE = 25;    /**
     * mysql_stmt_reset
     */
    public static final byte COM_STMT_RESET = 26;    /**
     * mysql_set_server_option
     */
    public static final byte COM_SET_OPTION = 27;    /**
     * mysql_stmt_fetch
     */
    public static final byte COM_STMT_FETCH = 28;    /**
     * mysql packet length
     */
    public int packetLength;    /**
     * mysql packet id
     */
    public byte packetId;    /**
     * calculate mysql packet length
     */
    public abstract int calcPacketSize();    /**
     * mysql packet info
     */
    protected abstract String getPacketInfo();    @Override
    public String toString() {        return new StringBuilder().append(getPacketInfo()).append("{length=")
                .append(packetLength).append(",id=").append(packetId)
                .append(&#39;}&#39;).toString();
    }

}
  1. handshake 패키지 클래스

/**
 * 
 * @author seaboat
 * @date 2016-09-25
 * @version 1.0
 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com
*
<b>blog: </b>http://www.php.cn/;/pre>
 * <p>AuthPacket means mysql initial handshake packet .</p>
 */public class HandshakePacket extends MySQLPacket {
    private static final byte[] FILLER_13 = new byte[] { 0, 0, 0, 0, 0, 0, 0,            
    0, 0, 0, 0, 0, 0 };    
    public byte protocolVersion;    
    public byte[] serverVersion;    
    public long threadId;    
    public byte[] seed;    
    public int serverCapabilities;    
    public byte serverCharsetIndex;    
    public int serverStatus;    
    public byte[] restOfScrambleBuff;    
    public void read(byte[] data) {
        MySQLMessage mm = new MySQLMessage(data);
        packetLength = mm.readUB3();
        packetId = mm.read();
        protocolVersion = mm.read();
        serverVersion = mm.readBytesWithNull();
        threadId = mm.readUB4();
        seed = mm.readBytesWithNull();
        serverCapabilities = mm.readUB2();
        serverCharsetIndex = mm.read();
        serverStatus = mm.readUB2();
        mm.move(13);
        restOfScrambleBuff = mm.readBytesWithNull();
    }    @Override
    public int calcPacketSize() {        int size = 1;
        size += serverVersion.length;// n
        size += 5;// 1+4
        size += seed.length;// 8
        size += 19;// 1+2+1+2+13
        size += restOfScrambleBuff.length;// 12
        size += 1;// 1
        return size;
    }    public void write(ByteBuffer buffer) {
        BufferUtil.writeUB3(buffer, calcPacketSize());
        buffer.put(packetId);
        buffer.put(protocolVersion);
        BufferUtil.writeWithNull(buffer, serverVersion);
        BufferUtil.writeUB4(buffer, threadId);
        BufferUtil.writeWithNull(buffer, seed);
        BufferUtil.writeUB2(buffer, serverCapabilities);
        buffer.put(serverCharsetIndex);
        BufferUtil.writeUB2(buffer, serverStatus);
        buffer.put(FILLER_13);
        BufferUtil.writeWithNull(buffer, restOfScrambleBuff);
    }    @Override
    protected String getPacketInfo() {        
    return "MySQL Handshake Packet";
    }

}
  1. 서비스 터미널 기능 클래스

/**
 * 
 * @author seaboat
 * @date 2016-09-25
 * @version 1.0
 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com
*
<b>blog: </b>http://www.php.cn/;/pre>
 * <p>server capabilities .</p>
 */public interface Capabilities {

    // new more secure passwords
    int CLIENT_LONG_PASSWORD = 1;    // Found instead of affected rows
    int CLIENT_FOUND_ROWS = 2;    // Get all column flags
    int CLIENT_LONG_FLAG = 4;    // One can specify db on connect
    int CLIENT_CONNECT_WITH_DB = 8;    // Don&#39;t allow database.table.column
    int CLIENT_NO_SCHEMA = 16;    // Can use compression protocol
    int CLIENT_COMPRESS = 32;    // Odbc client
    int CLIENT_ODBC = 64;    // Can use LOAD DATA LOCAL
    int CLIENT_LOCAL_FILES = 128;    // Ignore spaces before &#39;(&#39;
    int CLIENT_IGNORE_SPACE = 256;    // New 4.1 protocol This is an interactive client
    int CLIENT_PROTOCOL_41 = 512;    // This is an interactive client
    int CLIENT_INTERACTIVE = 1024;    // Switch to SSL after handshake
    int CLIENT_SSL = 2048;    // IGNORE sigpipes
    int CLIENT_IGNORE_SIGPIPE = 4096;    // Client knows about transactions
    int CLIENT_TRANSACTIONS = 8192;    // Old flag for 4.1 protocol
    int CLIENT_RESERVED = 16384;    // New 4.1 authentication
    int CLIENT_SECURE_CONNECTION = 32768;    // Enable/disable multi-stmt support
    int CLIENT_MULTI_STATEMENTS = 65536;    // Enable/disable multi-results
    int CLIENT_MULTI_RESULTS = 131072;

}
  1. 테스트 클래스

/**
 * 
 * @author seaboat
 * @date 2016-09-25
 * @version 1.0
 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com
*
<b>blog: </b>http://www.php.cn/;/pre>
 * <p>test handshake packet.</p>
 */public class HandshakePacketTest {
    private final static byte[] hex = "0123456789ABCDEF".getBytes();    @Test
    public void produce() {        
    byte[] rand1 = RandomUtil.randomBytes(8);        
    byte[] rand2 = RandomUtil.randomBytes(12);        
    byte[] seed = new byte[rand1.length + rand2.length];
        System.arraycopy(rand1, 0, seed, 0, rand1.length);
        System.arraycopy(rand2, 0, seed, rand1.length, rand2.length);
        HandshakePacket hs = new HandshakePacket();
        hs.packetId = 0;
        hs.protocolVersion = Versions.PROTOCOL_VERSION;
        hs.serverVersion = Versions.SERVER_VERSION;
        hs.threadId = 1000;
        hs.seed = rand1;
        hs.serverCapabilities = getServerCapabilities();
        hs.serverCharsetIndex = (byte) (CharsetUtil.getIndex("utf8") & 0xff);
        hs.serverStatus = 2;
        hs.restOfScrambleBuff = rand2;

        ByteBuffer buffer = ByteBuffer.allocate(256);
        hs.write(buffer);
        buffer.flip();        
        byte[] bytes = new byte[buffer.remaining()];
        buffer.get(bytes, 0, bytes.length);
        String result = Bytes2HexString(bytes);
        assertTrue(Integer.valueOf(result.substring(0,2),16)==result.length()/2-4);
    }    public static String Bytes2HexString(byte[] b) {        
    byte[] buff = new byte[2 * b.length];        
    for (int i = 0; i < b.length; i++) {
            buff[2 * i] = hex[(b[i] >> 4) & 0x0f];
            buff[2 * i + 1] = hex[b[i] & 0x0f];
        }        return new String(buff);
    }    public static String str2HexStr(String str) {        
    char[] chars = "0123456789ABCDEF".toCharArray();
        StringBuilder sb = new StringBuilder("");        
        byte[] bs = str.getBytes();        
        int bit;        
        for (int i = 0; i < bs.length; i++) {
            bit = (bs[i] & 0x0f0) >> 4;
            sb.append(chars[bit]);
            bit = bs[i] & 0x0f;
            sb.append(chars[bit]);
        }        return sb.toString();
    }    protected int getServerCapabilities() {        
    int flag = 0;
        flag |= Capabilities.CLIENT_LONG_PASSWORD;
        flag |= Capabilities.CLIENT_FOUND_ROWS;
        flag |= Capabilities.CLIENT_LONG_FLAG;
        flag |= Capabilities.CLIENT_CONNECT_WITH_DB;
        flag |= Capabilities.CLIENT_ODBC;
        flag |= Capabilities.CLIENT_IGNORE_SPACE;
        flag |= Capabilities.CLIENT_PROTOCOL_41;
        flag |= Capabilities.CLIENT_INTERACTIVE;
        flag |= Capabilities.CLIENT_IGNORE_SIGPIPE;
        flag |= Capabilities.CLIENT_TRANSACTIONS;
        flag |= Capabilities.CLIENT_SECURE_CONNECTION;        
        return flag;
    }

}


위 내용은 mysql 프로토콜의 서버 핸드셰이크 패키지에 대한 자세한 소개 및 분석의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!

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