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rmcp_plus_session.go
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rmcp_plus_session.go
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package virtualbmc
import (
"bytes"
"crypto/rand"
"encoding/binary"
)
type rmcpPlusSessionHolder struct {
sessions map[uint32]*rmcpPlusSession
}
type rmcpPlusSession struct {
RemoteConsoleSessionId uint32
ManagedSystemSessionId uint32
RemoteConsoleRandomNumber [16]byte
ManagedSystemRandomNumber [16]byte
RequestedPrivilegeLevel uint8
ManagedSystemGuid [16]byte
UserName []byte
UserNameLength uint8
SessionIntegrityKey []byte
IntegrityKey []byte
ConfidentialityKey []byte
}
func newRMCPPlusSessionHolder() *rmcpPlusSessionHolder {
return &rmcpPlusSessionHolder{sessions: make(map[uint32]*rmcpPlusSession)}
}
func (r *rmcpPlusSessionHolder) getNewRMCPPlusSession(remoteConsoleSessionId uint32) (*rmcpPlusSession, error) {
sessionId, err := generateRandomUint32()
if err != nil {
return nil, err
}
for {
if _, ok := r.sessions[*sessionId]; ok {
sessionId, err = generateRandomUint32()
if err != nil {
return nil, err
}
} else {
break
}
}
session := &rmcpPlusSession{}
session.ManagedSystemSessionId = *sessionId
session.RemoteConsoleSessionId = remoteConsoleSessionId
r.sessions[*sessionId] = session
return session, nil
}
func (r *rmcpPlusSessionHolder) getRMCPPlusSession(id uint32) (*rmcpPlusSession, bool) {
session, ok := r.sessions[id]
return session, ok
}
func (r *rmcpPlusSessionHolder) removeRMCPPlusSession(id uint32) {
_, ok := r.sessions[id]
if ok {
delete(r.sessions, id)
}
}
func generateRandomUint32() (*uint32, error) {
b := make([]byte, 4)
_, err := rand.Read(b)
if err != nil {
return nil, err
}
buf := bytes.NewBuffer(b)
var num uint32
if err := binary.Read(buf, binary.LittleEndian, &num); err != nil {
return nil, err
}
return &num, err
}