概要
mysql クライアントから mysql サーバーへのログインには対話型のプロセスが必要です。ここでは、まずサーバーからクライアントに送信される初期ハンドシェイク パケットを確認します。以下に示すように、クライアントがソケットを介してサーバーによって指定されたポートに接続した後、サーバーは初期ハンドシェイク パケットをクライアントに送信します。サーバーは、サービスのバージョンや構成に応じて、異なる初期化ハンドシェイク パケットを返します。
client server |------connect---- >| | | |<----handshake-----| | | | | | |
| タイプ | 名前 | 説明 |
|---|---|---|
| int<3> | ペイロード長 | 最下位バイト順に格納され、3 バイトが支払われます負荷との組み合わせメッセージヘッダーを形成する 1 バイトのシーケンス番号 |
| int<1> | シリアル番号 | |
| 文字列 | ペイロード | 、長さは以前に指定されたペイロードの長さです |
HandshakeV10プロトコルは以下の通り
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
}
}定義バージョン
/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com*
<b>blog: </b>//m.sbmmt.com/;/pre>
* <p>proxy's version.</p>
*/public interface Versions {
byte PROTOCOL_VERSION = 10; byte[] SERVER_VERSION = "5.6.0-snapshot".getBytes();
}乱数ツール
/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com*
<b>blog: </b>//m.sbmmt.com/;/pre>
* <p>a random util .</p>
*/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;
}
}
/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com*
<b>blog: </b>//m.sbmmt.com/;/pre>
* <p>MySQLPacket is mysql'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('}').toString();
}
}/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com*
<b>blog: </b>//m.sbmmt.com/;/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";
}
}/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com*
<b>blog: </b>//m.sbmmt.com/;/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'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;
}/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com*
<b>blog: </b>//m.sbmmt.com/;/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;
}
}以上がmysql プロトコルのサーバー ハンドシェイク パッケージとその分析の詳細な紹介の詳細内容です。詳細については、PHP 中国語 Web サイトの他の関連記事を参照してください。
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