telebit/vendor/github.com/jcmturner/gokrb5/v8/messages/KRBSafe.go

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2020-06-03 06:18:04 +00:00
package messages
import (
"fmt"
"time"
"github.com/jcmturner/gofork/encoding/asn1"
"github.com/jcmturner/gokrb5/v8/iana/asnAppTag"
"github.com/jcmturner/gokrb5/v8/iana/msgtype"
"github.com/jcmturner/gokrb5/v8/krberror"
"github.com/jcmturner/gokrb5/v8/types"
)
// KRBSafe implements RFC 4120 KRB_SAFE: https://tools.ietf.org/html/rfc4120#section-5.6.1.
type KRBSafe struct {
PVNO int `asn1:"explicit,tag:0"`
MsgType int `asn1:"explicit,tag:1"`
SafeBody KRBSafeBody `asn1:"explicit,tag:2"`
Cksum types.Checksum `asn1:"explicit,tag:3"`
}
// KRBSafeBody implements the KRB_SAFE_BODY of KRB_SAFE.
type KRBSafeBody struct {
UserData []byte `asn1:"explicit,tag:0"`
Timestamp time.Time `asn1:"generalized,optional,explicit,tag:1"`
Usec int `asn1:"optional,explicit,tag:2"`
SequenceNumber int64 `asn1:"optional,explicit,tag:3"`
SAddress types.HostAddress `asn1:"explicit,tag:4"`
RAddress types.HostAddress `asn1:"optional,explicit,tag:5"`
}
// Unmarshal bytes b into the KRBSafe struct.
func (s *KRBSafe) Unmarshal(b []byte) error {
_, err := asn1.UnmarshalWithParams(b, s, fmt.Sprintf("application,explicit,tag:%v", asnAppTag.KRBSafe))
if err != nil {
return processUnmarshalReplyError(b, err)
}
expectedMsgType := msgtype.KRB_SAFE
if s.MsgType != expectedMsgType {
return krberror.NewErrorf(krberror.KRBMsgError, "message ID does not indicate a KRB_SAFE. Expected: %v; Actual: %v", expectedMsgType, s.MsgType)
}
return nil
}