62 lines
2.4 KiB
Go
62 lines
2.4 KiB
Go
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package service
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import (
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"time"
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"github.com/jcmturner/gokrb5/v8/credentials"
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"github.com/jcmturner/gokrb5/v8/iana/errorcode"
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"github.com/jcmturner/gokrb5/v8/messages"
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)
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// VerifyAPREQ verifies an AP_REQ sent to the service. Returns a boolean for if the AP_REQ is valid and the client's principal name and realm.
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func VerifyAPREQ(APReq *messages.APReq, s *Settings) (bool, *credentials.Credentials, error) {
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var creds *credentials.Credentials
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ok, err := APReq.Verify(s.Keytab, s.MaxClockSkew(), s.ClientAddress(), s.KeytabPrincipal())
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if err != nil || !ok {
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return false, creds, err
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}
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if s.RequireHostAddr() && len(APReq.Ticket.DecryptedEncPart.CAddr) < 1 {
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return false, creds,
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messages.NewKRBError(APReq.Ticket.SName, APReq.Ticket.Realm, errorcode.KRB_AP_ERR_BADADDR, "ticket does not contain HostAddress values required")
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}
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// Check for replay
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rc := GetReplayCache(s.MaxClockSkew())
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if rc.IsReplay(APReq.Ticket.SName, APReq.Authenticator) {
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return false, creds,
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messages.NewKRBError(APReq.Ticket.SName, APReq.Ticket.Realm, errorcode.KRB_AP_ERR_REPEAT, "replay detected")
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}
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c := credentials.NewFromPrincipalName(APReq.Authenticator.CName, APReq.Authenticator.CRealm)
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creds = c
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creds.SetAuthTime(time.Now().UTC())
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creds.SetAuthenticated(true)
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creds.SetValidUntil(APReq.Ticket.DecryptedEncPart.EndTime)
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//PAC decoding
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if !s.disablePACDecoding {
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isPAC, pac, err := APReq.Ticket.GetPACType(s.Keytab, s.KeytabPrincipal(), s.Logger())
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if isPAC && err != nil {
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return false, creds, err
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}
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if isPAC {
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// There is a valid PAC. Adding attributes to creds
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creds.SetADCredentials(credentials.ADCredentials{
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GroupMembershipSIDs: pac.KerbValidationInfo.GetGroupMembershipSIDs(),
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LogOnTime: pac.KerbValidationInfo.LogOnTime.Time(),
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LogOffTime: pac.KerbValidationInfo.LogOffTime.Time(),
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PasswordLastSet: pac.KerbValidationInfo.PasswordLastSet.Time(),
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EffectiveName: pac.KerbValidationInfo.EffectiveName.Value,
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FullName: pac.KerbValidationInfo.FullName.Value,
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UserID: int(pac.KerbValidationInfo.UserID),
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PrimaryGroupID: int(pac.KerbValidationInfo.PrimaryGroupID),
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LogonServer: pac.KerbValidationInfo.LogonServer.Value,
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LogonDomainName: pac.KerbValidationInfo.LogonDomainName.Value,
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LogonDomainID: pac.KerbValidationInfo.LogonDomainID.String(),
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})
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}
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}
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return true, creds, nil
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}
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