Maison > Article > base de données > Une introduction détaillée au package d'authentification et au code du protocole mysql
https://github.com/sea-boat/mysql-protocol
Présentation
La connexion du client MySQL au serveur MySQL nécessite un processus interactif. Tout d'abord, le serveur envoie un paquet de prise de contact initial au client. Après avoir reçu le paquet de prise de contact, le client renvoie un paquet d'authentification au serveur. . Comme suit, le package d'authentification est analysé ici.
client server |-------connect------>| | | |<-----handshake------| | | |---authentication--->| | |
4 capability flags, CLIENT_PROTOCOL_41 always set 4 max-packet size 1 character set string[23] reserved (all [0]) string[NUL] username if capabilities & CLIENT_PLUGIN_AUTH_LENENC_CLIENT_DATA { lenenc-int length of auth-response string[n] auth-response } else if capabilities & CLIENT_SECURE_CONNECTION { 1 length of auth-response string[n] auth-response } else { string[NUL] auth-response } if capabilities & CLIENT_CONNECT_WITH_DB { string[NUL] database } if capabilities & CLIENT_PLUGIN_AUTH { string[NUL] auth plugin name } if capabilities & CLIENT_CONNECT_ATTRS { lenenc-int length of all key-values lenenc-str key lenenc-str value if-more data in 'length of all key-values', more keys and value pairs }
Plus de détails : http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::HandshakeResponse
1. Type de package d'authentification
/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com*
blog: http://www.php.cn/;/pre> *mysql auth packet.
*/public class AuthPacket extends MySQLPacket { private static final byte[] FILLER = new byte[23]; public long clientFlags; public long maxPacketSize; public int charsetIndex; public byte[] extra; public String user; public byte[] password; public String database; public void read(byte[] data) { MySQLMessage mm = new MySQLMessage(data); packetLength = mm.readUB3(); packetId = mm.read(); clientFlags = mm.readUB4(); maxPacketSize = mm.readUB4(); charsetIndex = (mm.read() & 0xff); int current = mm.position(); int len = (int) mm.readLength(); if (len > 0 && len
Outil de cryptage et de décryptage
/** * * @author seaboat * @date 2016-09-25 * @version 1.0 * <pre class="brush:php;toolbar:false"><b>email: </b>849586227@qq.com*blog: http://www.php.cn/;/pre> *a security util .
*/public class SecurityUtil { public static final byte[] scramble411(byte[] pass, byte[] seed) throws NoSuchAlgorithmException { MessageDigest md = MessageDigest.getInstance("SHA-1"); byte[] pass1 = md.digest(pass); md.reset(); byte[] pass2 = md.digest(pass1); md.reset(); md.update(seed); byte[] pass3 = md.digest(pass2); for (int i = 0; i
Cours de test
/** * * @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 auth packet.</p> */public class AuthPacketTest { @Test public void produce() { // handshake packet's rand1 and rand2 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); AuthPacket auth = new AuthPacket(); auth.packetId = 0; auth.clientFlags = getClientCapabilities(); auth.maxPacketSize = 1024 * 1024 * 16; auth.user = "seaboat"; try { auth.password = SecurityUtil .scramble411("seaboat".getBytes(), seed); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } auth.database = "test"; ByteBuffer buffer = ByteBuffer.allocate(256); auth.write(buffer); buffer.flip(); byte[] bytes = new byte[buffer.remaining()]; buffer.get(bytes, 0, bytes.length); String result = HexUtil.Bytes2HexString(bytes); System.out.println(result); assertTrue(Integer.valueOf(result.substring(0, 2), 16) == result .length() / 2 - 4); AuthPacket auth2 = new AuthPacket(); auth2.read(bytes); assertTrue(auth2.database.equals("test")); } protected int getClientCapabilities() { 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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