Source File
	aes_128_ccm.go

Belonging Package
	github.com/pion/dtls/v3/internal/ciphersuite

// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT

package ciphersuite

import (
	"github.com/pion/dtls/v3/pkg/crypto/ciphersuite"
	"github.com/pion/dtls/v3/pkg/crypto/clientcertificate"
)

// Aes128Ccm is a base class used by multiple AES-CCM Ciphers.
type Aes128Ccm struct {
	AesCcm
}

func newAes128Ccm(
	clientCertificateType clientcertificate.Type,
	id ID,
	psk bool,
	cryptoCCMTagLen ciphersuite.CCMTagLen,
	keyExchangeAlgorithm KeyExchangeAlgorithm,
	ecc bool,
) *Aes128Ccm {
	return &Aes128Ccm{
		AesCcm: AesCcm{
			clientCertificateType: clientCertificateType,
			id:                    id,
			psk:                   psk,
			cryptoCCMTagLen:       cryptoCCMTagLen,
			keyExchangeAlgorithm:  keyExchangeAlgorithm,
			ecc:                   ecc,
		},
	}
}

// Init initializes the internal Cipher with keying material.
func (c *Aes128Ccm) Init(masterSecret, clientRandom, serverRandom []byte, isClient bool) error {
	const prfKeyLen = 16

	return c.AesCcm.Init(masterSecret, clientRandom, serverRandom, isClient, prfKeyLen)
}

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