65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
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// Copyright 2018 The GoPacket Authors. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the LICENSE file in the root of the source
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// tree.
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package layers
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import (
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"errors"
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"github.com/google/gopacket"
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)
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// TLSchangeCipherSpec defines the message value inside ChangeCipherSpec Record
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type TLSchangeCipherSpec uint8
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const (
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TLSChangecipherspecMessage TLSchangeCipherSpec = 1
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TLSChangecipherspecUnknown TLSchangeCipherSpec = 255
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)
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// TLS Change Cipher Spec
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// 0 1 2 3 4 5 6 7 8
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// +--+--+--+--+--+--+--+--+
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// | Message |
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// +--+--+--+--+--+--+--+--+
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// TLSChangeCipherSpecRecord defines the type of data inside ChangeCipherSpec Record
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type TLSChangeCipherSpecRecord struct {
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TLSRecordHeader
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Message TLSchangeCipherSpec
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}
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// DecodeFromBytes decodes the slice into the TLS struct.
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func (t *TLSChangeCipherSpecRecord) decodeFromBytes(h TLSRecordHeader, data []byte, df gopacket.DecodeFeedback) error {
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// TLS Record Header
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t.ContentType = h.ContentType
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t.Version = h.Version
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t.Length = h.Length
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if len(data) != 1 {
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df.SetTruncated()
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return errors.New("TLS Change Cipher Spec record incorrect length")
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}
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t.Message = TLSchangeCipherSpec(data[0])
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if t.Message != TLSChangecipherspecMessage {
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t.Message = TLSChangecipherspecUnknown
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}
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return nil
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}
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// String shows the message value nicely formatted
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func (ccs TLSchangeCipherSpec) String() string {
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switch ccs {
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default:
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return "Unknown"
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case TLSChangecipherspecMessage:
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return "Change Cipher Spec Message"
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}
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}
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