mirror of https://github.com/tidwall/tile38.git
62 lines
2.0 KiB
Go
62 lines
2.0 KiB
Go
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package messages
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import (
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"fmt"
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"time"
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"github.com/jcmturner/gofork/encoding/asn1"
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"gopkg.in/jcmturner/gokrb5.v7/iana/asnAppTag"
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"gopkg.in/jcmturner/gokrb5.v7/iana/msgtype"
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"gopkg.in/jcmturner/gokrb5.v7/krberror"
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"gopkg.in/jcmturner/gokrb5.v7/types"
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)
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/*
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KRB-SAFE ::= [APPLICATION 20] SEQUENCE {
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pvno [0] INTEGER (5),
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msg-type [1] INTEGER (20),
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safe-body [2] KRB-SAFE-BODY,
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cksum [3] Checksum
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}
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KRB-SAFE-BODY ::= SEQUENCE {
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user-data [0] OCTET STRING,
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timestamp [1] KerberosTime OPTIONAL,
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usec [2] Microseconds OPTIONAL,
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seq-number [3] UInt32 OPTIONAL,
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s-address [4] HostAddress,
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r-address [5] HostAddress OPTIONAL
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}
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*/
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// KRBSafe implements RFC 4120 KRB_SAFE: https://tools.ietf.org/html/rfc4120#section-5.6.1.
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type KRBSafe struct {
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PVNO int `asn1:"explicit,tag:0"`
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MsgType int `asn1:"explicit,tag:1"`
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SafeBody KRBSafeBody `asn1:"explicit,tag:2"`
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Cksum types.Checksum `asn1:"explicit,tag:3"`
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}
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// KRBSafeBody implements the KRB_SAFE_BODY of KRB_SAFE.
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type KRBSafeBody struct {
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UserData []byte `asn1:"explicit,tag:0"`
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Timestamp time.Time `asn1:"generalized,optional,explicit,tag:1"`
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Usec int `asn1:"optional,explicit,tag:2"`
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SequenceNumber int64 `asn1:"optional,explicit,tag:3"`
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SAddress types.HostAddress `asn1:"explicit,tag:4"`
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RAddress types.HostAddress `asn1:"optional,explicit,tag:5"`
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}
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// Unmarshal bytes b into the KRBSafe struct.
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func (s *KRBSafe) Unmarshal(b []byte) error {
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_, err := asn1.UnmarshalWithParams(b, s, fmt.Sprintf("application,explicit,tag:%v", asnAppTag.KRBSafe))
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if err != nil {
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return processUnmarshalReplyError(b, err)
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}
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expectedMsgType := msgtype.KRB_SAFE
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if s.MsgType != expectedMsgType {
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return krberror.NewErrorf(krberror.KRBMsgError, "message ID does not indicate a KRB_SAFE. Expected: %v; Actual: %v", expectedMsgType, s.MsgType)
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}
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return nil
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}
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