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//
// Copyright (c) 2017 anygone contributors (see AUTHORS file)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * Neither the name of anygone nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
package satp
import (
"net"
"sync"
)
type SecurityAssociation struct {
mtx *sync.RWMutex
kd KeyDerivation
endpoints []*net.UDPAddr
nextSeq uint32
seqWins map[uint16]*SequenceWindow
}
func (sa *SecurityAssociation) SetKeyDerivation(kd KeyDerivation) {
sa.mtx.Lock()
defer sa.mtx.Unlock()
sa.kd = kd
}
func (sa *SecurityAssociation) KeyGenerate(dir Direction, usage KeyUsage, sequenceNumber uint32, out []byte) error {
sa.mtx.RLock()
defer sa.mtx.RUnlock()
return sa.kd.Generate(dir, usage, sequenceNumber, out)
}
func (sa *SecurityAssociation) EndpointCompareAndUpdate(idx uint, ep *net.UDPAddr) {
sa.mtx.RLock()
defer sa.mtx.RUnlock()
// TODO: implement this
}
func (sa *SecurityAssociation) EndpointsAndSequenceNumber() (seqNum uint32, eps []*net.UDPAddr) {
sa.mtx.RLock()
defer sa.mtx.RUnlock()
// TODO: implement this
return 0, nil
}
func (sa *SecurityAssociation) SquenceNumberCheck(senderID uint16, sequenceNumber uint32) bool {
sa.mtx.RLock()
defer sa.mtx.RUnlock()
// TODO: implement this
return false
}
func (sa *SecurityAssociation) SequenceNumberCheckAndSet(senderID uint16, sequenceNumber uint32) bool {
sa.mtx.RLock()
defer sa.mtx.RUnlock()
// TODO: implement this
return false
}
func NewSecurityAssociation() (sa *SecurityAssociation) {
sa = &SecurityAssociation{mtx: &sync.RWMutex{}}
sa.seqWins = make(map[uint16]*SequenceWindow)
return
}
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