120 lines
2.5 KiB
Go
120 lines
2.5 KiB
Go
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package server
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import (
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"bytes"
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"encoding/binary"
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. "github.com/siddontang/go-mysql/mysql"
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)
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func (c *Conn) writeInitialHandshake() error {
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capability := CLIENT_LONG_PASSWORD | CLIENT_LONG_FLAG |
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CLIENT_CONNECT_WITH_DB | CLIENT_PROTOCOL_41 |
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CLIENT_TRANSACTIONS | CLIENT_SECURE_CONNECTION
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data := make([]byte, 4, 128)
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//min version 10
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data = append(data, 10)
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//server version[00]
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data = append(data, ServerVersion...)
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data = append(data, 0)
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//connection id
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data = append(data, byte(c.connectionID), byte(c.connectionID>>8), byte(c.connectionID>>16), byte(c.connectionID>>24))
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//auth-plugin-data-part-1
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data = append(data, c.salt[0:8]...)
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//filter [00]
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data = append(data, 0)
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//capability flag lower 2 bytes, using default capability here
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data = append(data, byte(capability), byte(capability>>8))
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//charset, utf-8 default
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data = append(data, uint8(DEFAULT_COLLATION_ID))
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//status
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data = append(data, byte(c.status), byte(c.status>>8))
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//below 13 byte may not be used
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//capability flag upper 2 bytes, using default capability here
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data = append(data, byte(capability>>16), byte(capability>>24))
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//filter [0x15], for wireshark dump, value is 0x15
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data = append(data, 0x15)
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//reserved 10 [00]
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data = append(data, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
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//auth-plugin-data-part-2
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data = append(data, c.salt[8:]...)
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//filter [00]
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data = append(data, 0)
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return c.WritePacket(data)
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}
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func (c *Conn) readHandshakeResponse(password string) error {
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data, err := c.ReadPacket()
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if err != nil {
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return err
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}
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pos := 0
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//capability
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c.capability = binary.LittleEndian.Uint32(data[:4])
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pos += 4
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//skip max packet size
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pos += 4
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//charset, skip, if you want to use another charset, use set names
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//c.collation = CollationId(data[pos])
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pos++
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//skip reserved 23[00]
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pos += 23
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//user name
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user := string(data[pos : pos+bytes.IndexByte(data[pos:], 0)])
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pos += len(user) + 1
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if c.user != user {
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return NewDefaultError(ER_NO_SUCH_USER, user, c.RemoteAddr().String())
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}
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//auth length and auth
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authLen := int(data[pos])
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pos++
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auth := data[pos : pos+authLen]
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checkAuth := CalcPassword(c.salt, []byte(password))
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if !bytes.Equal(auth, checkAuth) {
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return NewDefaultError(ER_ACCESS_DENIED_ERROR, c.RemoteAddr().String(), c.user, "Yes")
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}
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pos += authLen
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if c.capability|CLIENT_CONNECT_WITH_DB > 0 {
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if len(data[pos:]) == 0 {
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return nil
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}
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db := string(data[pos : pos+bytes.IndexByte(data[pos:], 0)])
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pos += len(db) + 1
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if err = c.h.UseDB(db); err != nil {
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return err
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}
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}
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return nil
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}
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