Destruction sécurisée de fichier implémentée
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14f0c61c6e
commit
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@ -4,9 +4,9 @@ import (
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"StoreBackEnd/pkg/protocol"
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"StoreBackEnd/pkg/protocol/repository"
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"StoreBackEnd/pkg/protocol/rules/writers"
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"StoreBackEnd/pkg/utils"
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"bufio"
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"fmt"
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"os"
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)
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// EraseFileRulePrefix Identifiant de cette règle
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@ -43,8 +43,9 @@ func (rule EraseFileRule) Execute(data string) (*protocol.ProtocolWriterResult,
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if rule.Match(data) {
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values := rule.matcher.Parse(data)
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errRemoveFile := os.Remove(fmt.Sprintf("%s/%s", rule.storagePath, values[1]))
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if errRemoveFile != nil {
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//errRemoveFile := os.Remove(fmt.Sprintf("%s/%s", rule.storagePath, values[1]))
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hasRemoveFile := utils.DeleteFile(fmt.Sprintf("%s\\%s", rule.storagePath, values[1]), 10)
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if !hasRemoveFile {
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return rule.protocolRepo.ExecuteWriter(writers.EraseErrorRulePrefix), nil
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}
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65
pkg/utils/FileSuppressor.go
Normal file
65
pkg/utils/FileSuppressor.go
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@ -0,0 +1,65 @@
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package utils
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import (
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"StoreBackEnd/pkg/utils/crypto"
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"math/rand"
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"os"
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"strconv"
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)
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func DeleteFile(filePath string, secureLevel int) bool {
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for i := 0; i < secureLevel; i++ {
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if !writeRandomFile(filePath) {
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return false
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}
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}
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errRemoveFile := os.Remove(filePath)
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return errRemoveFile == nil
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}
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func writeRandomFile(filePath string) bool {
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file, errOpen := os.OpenFile(filePath, os.O_RDWR, 0660)
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if errOpen != nil {
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return false
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}
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// Fermeture du fichier anticipée (ici afin de le fermer même si copy commet une erreur)
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defer file.Close()
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//Vérifier que la taille du fichier est plus petite ou plus grande que 1024
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//Si plus petite, le buffer prend la taille du fichier
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//Sinon le buffer a une taille de 1024
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var buffer []byte
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fileStat, errStat := file.Stat()
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if errStat != nil {
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return false
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}
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if fileStat.Size() < 1024 {
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buffer = make([]byte, fileStat.Size())
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} else {
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buffer = make([]byte, 1024)
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}
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currentSize := int64(0)
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// Copy file
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return copyRandomFile(currentSize, fileStat.Size(), buffer, file)
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}
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func copyRandomFile(currentSize int64, fileSize int64, buffer []byte, file *os.File) bool {
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// Retrieving file
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src := crypto.NewCryptoSource()
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for currentSize < fileSize {
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random := rand.New(src)
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buffer = []byte(strconv.FormatInt(int64(random.Uint64()), 10))
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length, err := file.WriteAt(buffer, currentSize)
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if err != nil {
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return false
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}
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currentSize += int64(length)
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check := fileSize - currentSize
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if 1024 > check && check > 0 {
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buffer = make([]byte, check)
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}
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}
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return true
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}
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29
pkg/utils/crypto/CryptoSource.go
Normal file
29
pkg/utils/crypto/CryptoSource.go
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@ -0,0 +1,29 @@
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package crypto
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import (
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"crypto/rand"
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"encoding/binary"
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"log"
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)
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// Source : https://programming.guide/go/crypto-rand-int.html
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type CryptoSource struct{}
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func NewCryptoSource() *CryptoSource {
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return &CryptoSource{}
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}
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func (s CryptoSource) Int63() int64 {
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return int64(s.Uint64() & ^uint64(1<<63))
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}
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func (s CryptoSource) Seed(seed int64) {}
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func (s CryptoSource) Uint64() (v uint64) {
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err := binary.Read(rand.Reader, binary.BigEndian, &v)
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if err != nil {
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log.Fatal(err)
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}
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return v
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}
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@ -1,8 +1,8 @@
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{
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"multicastNetworkInterface" : "wlp1s0",
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"multicastNetworkInterface" : "Loopback Pseudo-Interface 1",
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"multicastAddress" : "224.66.66.1:15502",
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"multicastSecond" : 30,
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"domain" : "lightcontainerSB01",
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"unicastPort" : 58000,
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"storagePath" : "/home/benjamin/sbe"
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"storagePath" : "C:\\Users\\ledou\\Documents\\sbe"
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}
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