181 lines
3.0 KiB
Go
181 lines
3.0 KiB
Go
package ldap
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import (
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"bytes"
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"encoding/binary"
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"git.loafle.net/overflow/overflow_discovery/service/matcher"
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)
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const (
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LDAP_MESSAGE_ID = 0x99
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LDAP_MESSAGE_ID_QUIT = 0x89
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LDAP_VERSION3 = 3
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LDAP_SUCCESS = 0x00
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LDAP_REQ_BIND = 0x60
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LDAP_REQ_UNBIND = 0x42
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LDAP_RES_BIND = 0x61
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LDAP_AUTH_SIMPLE = 0x80
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)
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type LDAP_SEND struct {
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DefaultCode uint8
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PacketLength uint8
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NextType1 uint8
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NextTypeLength1 uint8
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MessageId uint8
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ProtocolOp uint8
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ProtocolOpLength uint8
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NextType2 uint8
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NextTypeLength2 uint8
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Version uint8
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NextType3 uint8
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NextTypeLength3 uint8
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Auth uint8
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AuthLength uint8
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}
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type LDAP_RECV struct {
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DefaultCode uint8
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UnknwonCode1 uint8
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EndCode11 uint8
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EndCode12 uint8
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MessageId uint8
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ProtocolOp uint8
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UnknwonCode2 uint8
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EndCode21 uint8
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EndCode22 uint8
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ResultCode uint8
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UnknwonCode3 uint8
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UnknwonCode4 uint8
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Auth uint8
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UnknwonCode5 uint8
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}
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type LDAP_QUIT struct {
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DefaultCode uint8
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UnknwonCode1 uint8
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PacketLength uint32
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NextType1 uint8
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NextTypeLength1 uint8
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MessageId uint8
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ProtocolOp uint8
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protocolOpLength uint8
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}
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type LDAPMatcher struct {
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matcher.Matchers
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}
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func (l *LDAPMatcher) ServiceName() string {
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return "LDAP"
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}
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func (l *LDAPMatcher) IsPrePacket() bool {
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return false
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}
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func (l *LDAPMatcher) IsError(info matcher.MatchInfo, index int, packet *matcher.Packet) bool {
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return false
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}
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func (l *LDAPMatcher) Match(info matcher.MatchInfo, index int, packet *matcher.Packet) bool {
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if packet == nil {
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return false
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}
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buf := new(bytes.Buffer)
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buf.Write(packet.Buffer)
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ldapRecv := LDAP_RECV{}
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binary.Read(buf, binary.LittleEndian, &ldapRecv)
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if ldapRecv.MessageId != LDAP_MESSAGE_ID {
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return false
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}
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if ldapRecv.ProtocolOp != LDAP_RES_BIND {
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return false
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}
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if ldapRecv.ResultCode != LDAP_SUCCESS {
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return false
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}
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return true
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}
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func NewMatcher() matcher.Matcher {
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ls := LDAP_SEND{
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DefaultCode: 0x30,
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PacketLength: 0x0c, // size -2
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NextType1: 0x02,
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NextTypeLength1: 0x01,
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MessageId: LDAP_MESSAGE_ID,
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ProtocolOp: LDAP_REQ_BIND,
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ProtocolOpLength: 0x07,
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NextType2: 0x02,
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NextTypeLength2: 0x01,
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Version: LDAP_VERSION3,
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NextType3: 0x04,
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NextTypeLength3: 0x00,
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Auth: LDAP_AUTH_SIMPLE,
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AuthLength: 0x00,
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}
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mCache := new(bytes.Buffer)
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binary.Write(mCache, binary.LittleEndian, ls)
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sendByte1 := mCache.Bytes()
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m := &LDAPMatcher{
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//sendPackets: make([][]byte, 2),
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}
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m.AddPacket(matcher.NewPacket(sendByte1, len(sendByte1)))
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lq := LDAP_QUIT{
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DefaultCode: 0x30,
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UnknwonCode1: 0x84,
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PacketLength: 0x05,
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NextType1: 0x02,
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NextTypeLength1: 0x01,
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MessageId: LDAP_MESSAGE_ID_QUIT,
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ProtocolOp: LDAP_REQ_UNBIND,
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protocolOpLength: 0x00,
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}
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lqBuffer := new(bytes.Buffer)
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binary.Write(lqBuffer, binary.BigEndian, lq)
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sendByte2 := lqBuffer.Bytes()
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m.AddPacket(matcher.NewPacket(sendByte2, len(sendByte2)))
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return m
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}
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