shredding

config.toml

@@ -1,4 +1,4 @@
-webroot = "www"
+webroot = "./www"
 lport = "5000"
 vhost = "hardfiles.org"
 dbfile = "dbfile.db"

go.mod

@@ -3,18 +3,18 @@ module hardfiles
 go 1.21.0
 
 require (
-	github.com/boltdb/bolt v1.3.1
+	github.com/BurntSushi/toml v1.3.2
-	github.com/gabriel-vasile/mimetype v1.4.2
+	github.com/gabriel-vasile/mimetype v1.4.3
 	github.com/gorilla/mux v1.8.0
 	github.com/landlock-lsm/go-landlock v0.0.0-20230607164353-b03374193cb2
 	github.com/rs/zerolog v1.31.0
+	go.etcd.io/bbolt v1.3.8
 )
 
 require (
-	github.com/BurntSushi/toml v1.3.2 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.19 // indirect
-	golang.org/x/net v0.8.0 // indirect
+	golang.org/x/net v0.17.0 // indirect
-	golang.org/x/sys v0.12.0 // indirect
+	golang.org/x/sys v0.13.0 // indirect
 	kernel.org/pub/linux/libs/security/libcap/psx v1.2.66 // indirect
 )

go.sum

@@ -1,10 +1,10 @@
 github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8=
 github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
-github.com/boltdb/bolt v1.3.1 h1:JQmyP4ZBrce+ZQu0dY660FMfatumYDLun9hBCUVIkF4=
-github.com/boltdb/bolt v1.3.1/go.mod h1:clJnj/oiGkjum5o1McbSZDSLxVThjynRyGBgiAx27Ps=
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
-github.com/gabriel-vasile/mimetype v1.4.2 h1:w5qFW6JKBz9Y393Y4q372O9A7cUSequkh1Q7OhCmWKU=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/gabriel-vasile/mimetype v1.4.2/go.mod h1:zApsH/mKG4w07erKIaJPFiX0Tsq9BFQgN3qGY5GnNgA=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0=
+github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
 github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
@@ -16,14 +16,23 @@ github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/
 github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
 github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
 github.com/rs/zerolog v1.31.0 h1:FcTR3NnLWW+NnTwwhFWiJSZr4ECLpqCm6QsEnyvbV4A=
 github.com/rs/zerolog v1.31.0/go.mod h1:/7mN4D5sKwJLZQ2b/znpjC3/GQWY/xaDXUM0kKWRHss=
-golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
+github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
-golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
+github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+go.etcd.io/bbolt v1.3.8 h1:xs88BrvEv273UsB79e0hcVrlUWmS0a8upikMFhSyAtA=
+go.etcd.io/bbolt v1.3.8/go.mod h1:N9Mkw9X8x5fupy0IKsmuqVtoGDyxsaDlbk4Rd05IAQw=
+golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM=
+golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
 golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
+golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 kernel.org/pub/linux/libs/security/libcap/psx v1.2.66 h1:ikIhPzfkSSAEwBOU+2DWhoF+xnGUhvlMTfQjBVhvzQY=
 kernel.org/pub/linux/libs/security/libcap/psx v1.2.66/go.mod h1:+l6Ee2F59XiJ2I6WR5ObpC1utCQJZ/VLsEbQCD8RG24=

main.go

@@ -9,12 +9,12 @@ import (
 	"time"
 
 	"github.com/BurntSushi/toml"
-	"github.com/boltdb/bolt"
 	"github.com/gabriel-vasile/mimetype"
 	"github.com/gorilla/mux"
 	"github.com/landlock-lsm/go-landlock/landlock"
 	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
+	bolt "go.etcd.io/bbolt"
 )
 
 var (
@@ -37,6 +37,67 @@ func LoadConf() {
 	}
 }
 
+func shred(path string) error {
+	log.Info().Msg("shredding file")
+	fileinfo, err := os.Stat(path)
+	if err != nil {
+		return err
+	}
+	size := fileinfo.Size()
+	err = scramble(path, size)
+	if err != nil {
+		return err
+	}
+
+	err = zeros(path, size)
+	if err != nil {
+		return err
+	}
+
+	err = os.Remove(path)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func scramble(path string, size int64) error {
+	var i int64
+	for i = 0; i < 7; i++ { // 7 iterations
+		file, err := os.OpenFile(path, os.O_RDWR, 0)
+		defer file.Close()
+		if err != nil {
+			return err
+		}
+		offset, err := file.Seek(0, 0)
+		if err != nil {
+			return err
+		}
+		buff := make([]byte, size)
+		rand.Read(buff)
+		file.WriteAt(buff, offset)
+		file.Close()
+	}
+	return nil
+}
+
+func zeros(path string, size int64) error {
+	file, err := os.OpenFile(path, os.O_RDWR, 0)
+	defer file.Close()
+	if err != nil {
+		return err
+	}
+
+	offset, err := file.Seek(0, 0)
+	if err != nil {
+		return err
+	}
+	buff := make([]byte, size)
+	file.WriteAt(buff, offset)
+	return nil
+}
+
 func NameGen() string {
 	const chars = "abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ123456789"
 	ll := len(chars)
@@ -59,7 +120,8 @@ func CheckFile(name string) bool { // false if doesn't exist, true if exists
 
 func UploadHandler(w http.ResponseWriter, r *http.Request) {
 	// expiry sanitize
-	twentyfour := int64(86400)
+	// twentyfour := int64(86400)
+	twentyfour := int64(10)
 
 	file, _, err := r.FormFile("file")
 	if err != nil {
@@ -122,8 +184,11 @@ func Cull() {
 					continue
 				}
 				if time.Now().After(time.Unix(eol, 0)) {
-					os.Remove(conf.FileFolder + "/" + string(k))
+					if err := shred(conf.FileFolder + "/" + string(k)); err != nil {
+						log.Error().Err(err).Msg("shredding failed")
+					} else {
 						removed += 1
+					}
 					c.Delete()
 				}
 			}
@@ -142,8 +207,8 @@ func main() {
 
 	err := landlock.V2.BestEffort().RestrictPaths(
 		landlock.RWDirs("./"+conf.FileFolder),
+		landlock.RWDirs(conf.Webroot),
 		landlock.RWFiles(conf.DBFile),
-		landlock.RWFiles(conf.Webroot+"/index.html"),
 	)
 
 	if err != nil {