详细介绍mysql 协议的服务端握手包及对其解析

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

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 } }

/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * 
email: 849586227@qq.com
*
        
blog: //m.sbmmt.com/;/pre> * 
proxy's version.
 */public interface Versions { byte PROTOCOL_VERSION = 10; byte[] SERVER_VERSION = "5.6.0-snapshot".getBytes(); }
        

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/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * 
email: 849586227@qq.com
*
        
blog: //m.sbmmt.com/;/pre> * 
a random util .
 */public class RandomUtil { private static final byte[] bytes = { '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'z', 'x', 'c', 'v', 'b', 'n', 'm', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'Z', 'X', 'C', 'V', 'B', 'N', 'M' }; 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; } }
        

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/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * 
email: 849586227@qq.com
*
        
blog: //m.sbmmt.com/;/pre> * 
MySQLPacket is mysql's basic packet.
 */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('}').toString(); } }
        

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/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * 
email: 849586227@qq.com
*
        
blog: //m.sbmmt.com/;/pre> * 
AuthPacket means mysql initial handshake packet .
 */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"; } }
        

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/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * 
email: 849586227@qq.com
*
        
blog: //m.sbmmt.com/;/pre> * 
server capabilities .
 */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'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 '(' 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; }
        

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/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * 
email: 849586227@qq.com
*
        
blog: //m.sbmmt.com/;/pre> * 
test handshake packet.
 */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; } }
        

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