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encrypted_packet.go
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/
encrypted_packet.go
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// Copyright 2021 Comcast Cable Communications Management, LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0
package scte35
const (
// EncryptionAlgorithmNone is the encryption_algorithm for None.
EncryptionAlgorithmNone = 0
// EncryptionAlgorithmDESECB is the encryption_algorithm for DES - ECB Mode.
EncryptionAlgorithmDESECB = 1
// EncryptionAlgorithmDESCBC is the encryption_algorithm for DES - CBC Mode.
EncryptionAlgorithmDESCBC = 2
// EncryptionAlgorithmTripleDES is the encryption_algorithm for Triple DES
// EDE3 - ECB Mode.
EncryptionAlgorithmTripleDES = 3
)
// EncryptedPacket contains the encryption details if this payload has been
// encrypted.
type EncryptedPacket struct {
EncryptionAlgorithm uint32 `xml:"encryptionAlgorithm,attr,omitempty" json:"encryptionAlgorithm,omitempty"`
CWIndex uint32 `xml:"cwIndex,attr,omitempty" json:"cwIndex,omitempty"`
}
// encryptionAlgorithmName returns the user-friendly encryption algorithm name
func (p *EncryptedPacket) encryptionAlgorithmName() string {
if p == nil {
return "No encryption"
}
switch p.EncryptionAlgorithm {
case EncryptionAlgorithmNone:
return "No encryption"
case EncryptionAlgorithmDESECB:
return "DES – ECB mode"
case EncryptionAlgorithmDESCBC:
return "DES – CBC mode"
case EncryptionAlgorithmTripleDES:
return "Triple DES EDE3 – ECB mode"
default:
return "User private"
}
}