69 lines
1.9 KiB
Go
69 lines
1.9 KiB
Go
// Package kadmin provides Kerberos administration capabilities.
|
|
package kadmin
|
|
|
|
import (
|
|
"gopkg.in/jcmturner/gokrb5.v7/crypto"
|
|
"gopkg.in/jcmturner/gokrb5.v7/krberror"
|
|
"gopkg.in/jcmturner/gokrb5.v7/messages"
|
|
"gopkg.in/jcmturner/gokrb5.v7/types"
|
|
)
|
|
|
|
// ChangePasswdMsg generate a change password request and also return the key needed to decrypt the reply.
|
|
func ChangePasswdMsg(cname types.PrincipalName, realm, password string, tkt messages.Ticket, sessionKey types.EncryptionKey) (r Request, k types.EncryptionKey, err error) {
|
|
// Create change password data struct and marshal to bytes
|
|
chgpasswd := ChangePasswdData{
|
|
NewPasswd: []byte(password),
|
|
TargName: cname,
|
|
TargRealm: realm,
|
|
}
|
|
chpwdb, err := chgpasswd.Marshal()
|
|
if err != nil {
|
|
err = krberror.Errorf(err, krberror.KRBMsgError, "error marshaling change passwd data")
|
|
return
|
|
}
|
|
|
|
// Generate authenticator
|
|
auth, err := types.NewAuthenticator(realm, cname)
|
|
if err != nil {
|
|
err = krberror.Errorf(err, krberror.KRBMsgError, "error generating new authenticator")
|
|
return
|
|
}
|
|
etype, err := crypto.GetEtype(sessionKey.KeyType)
|
|
if err != nil {
|
|
err = krberror.Errorf(err, krberror.KRBMsgError, "error generating subkey etype")
|
|
return
|
|
}
|
|
err = auth.GenerateSeqNumberAndSubKey(etype.GetETypeID(), etype.GetKeyByteSize())
|
|
if err != nil {
|
|
err = krberror.Errorf(err, krberror.KRBMsgError, "error generating subkey")
|
|
return
|
|
}
|
|
k = auth.SubKey
|
|
|
|
// Generate AP_REQ
|
|
APreq, err := messages.NewAPReq(tkt, sessionKey, auth)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
// Form the KRBPriv encpart data
|
|
kp := messages.EncKrbPrivPart{
|
|
UserData: chpwdb,
|
|
Timestamp: auth.CTime,
|
|
Usec: auth.Cusec,
|
|
SequenceNumber: auth.SeqNumber,
|
|
}
|
|
kpriv := messages.NewKRBPriv(kp)
|
|
err = kpriv.EncryptEncPart(k)
|
|
if err != nil {
|
|
err = krberror.Errorf(err, krberror.EncryptingError, "error encrypting change passwd data")
|
|
return
|
|
}
|
|
|
|
r = Request{
|
|
APREQ: APreq,
|
|
KRBPriv: kpriv,
|
|
}
|
|
return
|
|
}
|