internal void Encode(AsnWriter writer, Asn1Tag tag) { writer.PushSequence(tag); writer.PushSequence(new Asn1Tag(TagClass.ContextSpecific, 1)); writer.WriteInteger(ProtocolVersionNumber); writer.PopSequence(new Asn1Tag(TagClass.ContextSpecific, 1)); writer.PushSequence(new Asn1Tag(TagClass.ContextSpecific, 2)); writer.WriteInteger((long)MessageType); writer.PopSequence(new Asn1Tag(TagClass.ContextSpecific, 2)); writer.PushSequence(new Asn1Tag(TagClass.ContextSpecific, 3)); writer.PushSequence(); for (int i = 0; i < PaData.Length; i++) { PaData[i]?.Encode(writer); } writer.PopSequence(); writer.PopSequence(new Asn1Tag(TagClass.ContextSpecific, 3)); writer.PushSequence(new Asn1Tag(TagClass.ContextSpecific, 4)); Body?.Encode(writer); writer.PopSequence(new Asn1Tag(TagClass.ContextSpecific, 4)); writer.PopSequence(tag); }
public static KrbTgsReq CreateTgsReq( RequestServiceTicket rst, KrbEncryptionKey tgtSessionKey, KrbKdcRep kdcRep, out KrbEncryptionKey sessionKey ) { var sname = rst.ServicePrincipalName.Split('/', '@'); var tgt = kdcRep.Ticket; var additionalTickets = new List <KrbTicket>(); if (rst.KdcOptions.HasFlag(KdcOptions.EncTktInSkey) && rst.UserToUserTicket != null) { additionalTickets.Add(rst.UserToUserTicket); } if (!string.IsNullOrWhiteSpace(rst.S4uTarget)) { rst.KdcOptions |= KdcOptions.Forwardable; } if (rst.S4uTicket != null) { rst.KdcOptions |= KdcOptions.ConstrainedDelegation; additionalTickets.Add(rst.S4uTicket); } var body = new KrbKdcReqBody { EType = KerberosConstants.ETypes.ToArray(), KdcOptions = rst.KdcOptions, Nonce = KerberosConstants.GetNonce(), Realm = rst.Realm, SName = new KrbPrincipalName() { Type = PrincipalNameType.NT_SRV_INST, Name = sname }, Till = KerberosConstants.EndOfTime, CName = rst.CNameHint }; if (additionalTickets.Count > 0) { body.AdditionalTickets = additionalTickets.ToArray(); } var bodyChecksum = KrbChecksum.Create( body.Encode(), tgtSessionKey.AsKey(), KeyUsage.PaTgsReqChecksum ); var tgtApReq = CreateApReq(kdcRep, tgtSessionKey, bodyChecksum, out sessionKey); var pacOptions = new KrbPaPacOptions { Flags = PacOptions.ResourceBasedConstrainedDelegation | PacOptions.Claims | PacOptions.BranchAware }.Encode(); var paData = new List <KrbPaData>() { new KrbPaData { Type = PaDataType.PA_TGS_REQ, Value = tgtApReq.EncodeApplication() }, new KrbPaData { Type = PaDataType.PA_PAC_OPTIONS, Value = pacOptions } }; if (!string.IsNullOrWhiteSpace(rst.S4uTarget)) { paData.Add(new KrbPaData { Type = PaDataType.PA_FOR_USER, Value = EncodeS4URequest(rst.S4uTarget, tgt.Realm, tgtSessionKey) }); } var tgs = new KrbTgsReq { PaData = paData.ToArray(), Body = body }; return(tgs); }
public static KrbTgsReq CreateTgsReq( RequestServiceTicket rst, KrbEncryptionKey tgtSessionKey, KrbKdcRep kdcRep, out KrbEncryptionKey sessionKey ) { if (kdcRep == null) { throw new ArgumentNullException(nameof(kdcRep)); } if (tgtSessionKey == null) { throw new ArgumentNullException(nameof(tgtSessionKey)); } if (string.IsNullOrWhiteSpace(rst.ServicePrincipalName)) { throw new ArgumentNullException(nameof(rst.ServicePrincipalName)); } var sname = rst.ServicePrincipalName.Split('/', '@'); var tgt = kdcRep.Ticket; var additionalTickets = new List <KrbTicket>(); if (rst.KdcOptions.HasFlag(KdcOptions.EncTktInSkey) && rst.UserToUserTicket != null) { additionalTickets.Add(rst.UserToUserTicket); } if (!string.IsNullOrWhiteSpace(rst.S4uTarget) && rst.S4uTicket != null) { throw new InvalidOperationException(SR.Resource("S4uTargetTicketBothPresent")); } if (!string.IsNullOrWhiteSpace(rst.S4uTarget)) { rst.KdcOptions |= KdcOptions.Forwardable; } if (rst.S4uTicket != null) { rst.KdcOptions |= KdcOptions.ConstrainedDelegation; additionalTickets.Add(rst.S4uTicket); } var config = rst.Configuration ?? Krb5Config.Default(); var body = new KrbKdcReqBody { EType = GetPreferredETypes(config.Defaults.DefaultTgsEncTypes, config.Defaults.AllowWeakCrypto).ToArray(), KdcOptions = rst.KdcOptions, Nonce = GetNonce(), Realm = rst.Realm, SName = new KrbPrincipalName() { Type = PrincipalNameType.NT_SRV_INST, Name = sname }, Till = EndOfTime, CName = rst.CNameHint }; if (additionalTickets.Count > 0) { body.AdditionalTickets = additionalTickets.ToArray(); } var bodyChecksum = KrbChecksum.Create( body.Encode(), tgtSessionKey.AsKey(), KeyUsage.PaTgsReqChecksum ); var tgtApReq = CreateApReq(kdcRep, tgtSessionKey, bodyChecksum, out sessionKey); var pacOptions = new KrbPaPacOptions { Flags = PacOptions.ResourceBasedConstrainedDelegation | PacOptions.Claims | PacOptions.BranchAware }.Encode(); var paData = new List <KrbPaData>() { new KrbPaData { Type = PaDataType.PA_TGS_REQ, Value = tgtApReq.EncodeApplication() }, new KrbPaData { Type = PaDataType.PA_PAC_OPTIONS, Value = pacOptions } }; if (!string.IsNullOrWhiteSpace(rst.S4uTarget)) { if (tgtSessionKey.EType == EncryptionType.RC4_HMAC_NT) { paData.Add(new KrbPaData { Type = PaDataType.PA_FOR_USER, Value = EncodeS4ULegacyRequest(rst.S4uTarget, tgt.Realm, tgtSessionKey) }); } else { paData.Add(new KrbPaData { Type = PaDataType.PA_FOR_X509_USER, Value = EncodeS4URequest(rst.S4uTarget, rst.S4uTargetCertificate, body.Nonce, tgt.Realm, sessionKey) }); } } var tgs = new KrbTgsReq { PaData = paData.ToArray(), Body = body }; return(tgs); }