87 lines
2.0 KiB
Go
87 lines
2.0 KiB
Go
package ldap
|
|
|
|
import (
|
|
"math/rand"
|
|
"time"
|
|
|
|
osm "git.loafle.net/overflow/service_matcher-go"
|
|
ber "gopkg.in/asn1-ber.v1"
|
|
)
|
|
|
|
const (
|
|
ApplicationBindRequest = 0
|
|
ApplicationBindResponse = 1
|
|
)
|
|
|
|
type LDAPMatcher struct {
|
|
osm.Matchers
|
|
reqID int64
|
|
}
|
|
|
|
func (l *LDAPMatcher) Key() string {
|
|
return "LDAP"
|
|
}
|
|
|
|
func (l *LDAPMatcher) Name() string {
|
|
return "LDAP"
|
|
}
|
|
|
|
func (l *LDAPMatcher) Meta() osm.Metadata {
|
|
return nil
|
|
}
|
|
|
|
func (l *LDAPMatcher) IsPrePacket() bool {
|
|
return false
|
|
}
|
|
|
|
func (l *LDAPMatcher) IsError(info osm.MatchInfo, index int, packet *osm.Packet) bool {
|
|
return false
|
|
}
|
|
|
|
func (l *LDAPMatcher) Match(info osm.MatchInfo, index int, packet *osm.Packet) error {
|
|
|
|
if packet == nil || !packet.Valid() {
|
|
return osm.NoPacketReceivedError()
|
|
}
|
|
p := ber.DecodePacket(packet.Buffer)
|
|
|
|
if nil == p.Children || len(p.Children) <= 1 {
|
|
return osm.NotMatchedError()
|
|
}
|
|
|
|
respID, ok := p.Children[0].Value.(int64)
|
|
if !ok {
|
|
return osm.NotMatchedError()
|
|
}
|
|
if respID != l.reqID {
|
|
return osm.NotMatchedError()
|
|
}
|
|
|
|
if p.Children[1].Tag != ApplicationBindResponse {
|
|
return osm.NotMatchedError()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func NewMatcher() osm.Matcher {
|
|
|
|
m := &LDAPMatcher{}
|
|
|
|
rand.Seed(time.Now().UnixNano())
|
|
m.reqID = rand.Int63n(1000)
|
|
p := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "LDAP Request")
|
|
|
|
p.AppendChild(ber.NewInteger(ber.ClassUniversal, ber.TypePrimitive, ber.TagInteger, m.reqID, "MessageID"))
|
|
bindRequest := ber.Encode(ber.ClassApplication, ber.TypeConstructed, ApplicationBindRequest, nil, "Bind Request")
|
|
bindRequest.AppendChild(ber.NewInteger(ber.ClassUniversal, ber.TypePrimitive, ber.TagInteger, 2, "Version"))
|
|
bindRequest.AppendChild(ber.NewString(ber.ClassUniversal, ber.TypePrimitive, ber.TagOctetString, "LOAFLEOVERFLOW", "User Name"))
|
|
bindRequest.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 0, "LOAFLEOVERFLOW", "Password"))
|
|
p.AppendChild(bindRequest)
|
|
|
|
m.AddPacket(osm.NewPacket(p.Bytes(), len(p.Bytes())))
|
|
|
|
return m
|
|
|
|
}
|