WIP [VOL-2811] - Incorporate preliminary onu-adapter-go code into opencord repo

- reason "discovery-mibsync-complete" reached (via full MibUpload only, received data won't be stored yet)
- first review comments of patchset #4 considered
 (please have a look into our inline-comments in Gerrit to know more about the current state)
- no refactoring done yet

Change-Id: Iac47817f8ce4bd28dd8132f530b0570d57ae99b8
Signed-off-by: Holger Hildebrandt <holger.hildebrandt@adtran.com>
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/messages/APRep.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/messages/APRep.go
new file mode 100644
index 0000000..9c244f0
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/messages/APRep.go
@@ -0,0 +1,64 @@
+package messages
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/jcmturner/gofork/encoding/asn1"
+	"gopkg.in/jcmturner/gokrb5.v7/iana/asnAppTag"
+	"gopkg.in/jcmturner/gokrb5.v7/iana/msgtype"
+	"gopkg.in/jcmturner/gokrb5.v7/krberror"
+	"gopkg.in/jcmturner/gokrb5.v7/types"
+)
+
+/*
+AP-REP          ::= [APPLICATION 15] SEQUENCE {
+pvno            [0] INTEGER (5),
+msg-type        [1] INTEGER (15),
+enc-part        [2] EncryptedData -- EncAPRepPart
+}
+
+EncAPRepPart    ::= [APPLICATION 27] SEQUENCE {
+        ctime           [0] KerberosTime,
+        cusec           [1] Microseconds,
+        subkey          [2] EncryptionKey OPTIONAL,
+        seq-number      [3] UInt32 OPTIONAL
+}
+*/
+
+// APRep implements RFC 4120 KRB_AP_REP: https://tools.ietf.org/html/rfc4120#section-5.5.2.
+type APRep struct {
+	PVNO    int                 `asn1:"explicit,tag:0"`
+	MsgType int                 `asn1:"explicit,tag:1"`
+	EncPart types.EncryptedData `asn1:"explicit,tag:2"`
+}
+
+// EncAPRepPart is the encrypted part of KRB_AP_REP.
+type EncAPRepPart struct {
+	CTime          time.Time           `asn1:"generalized,explicit,tag:0"`
+	Cusec          int                 `asn1:"explicit,tag:1"`
+	Subkey         types.EncryptionKey `asn1:"optional,explicit,tag:2"`
+	SequenceNumber int64               `asn1:"optional,explicit,tag:3"`
+}
+
+// Unmarshal bytes b into the APRep struct.
+func (a *APRep) Unmarshal(b []byte) error {
+	_, err := asn1.UnmarshalWithParams(b, a, fmt.Sprintf("application,explicit,tag:%v", asnAppTag.APREP))
+	if err != nil {
+		return processUnmarshalReplyError(b, err)
+	}
+	expectedMsgType := msgtype.KRB_AP_REP
+	if a.MsgType != expectedMsgType {
+		return krberror.NewErrorf(krberror.KRBMsgError, "message ID does not indicate a KRB_AP_REP. Expected: %v; Actual: %v", expectedMsgType, a.MsgType)
+	}
+	return nil
+}
+
+// Unmarshal bytes b into the APRep encrypted part struct.
+func (a *EncAPRepPart) Unmarshal(b []byte) error {
+	_, err := asn1.UnmarshalWithParams(b, a, fmt.Sprintf("application,explicit,tag:%v", asnAppTag.EncAPRepPart))
+	if err != nil {
+		return krberror.Errorf(err, krberror.EncodingError, "AP_REP unmarshal error")
+	}
+	return nil
+}