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Diffstat (limited to 'mount.go')
-rw-r--r--mount.go45
1 files changed, 26 insertions, 19 deletions
diff --git a/mount.go b/mount.go
index 8a23a52..7b1fd4e 100644
--- a/mount.go
+++ b/mount.go
@@ -3,6 +3,7 @@ package main
import (
"encoding/json"
"fmt"
+ "log"
"log/syslog"
"net"
"os"
@@ -21,11 +22,13 @@ import (
"github.com/hanwen/go-fuse/fuse/pathfs"
"github.com/rfjakob/gocryptfs/internal/configfile"
+ "github.com/rfjakob/gocryptfs/internal/contentenc"
"github.com/rfjakob/gocryptfs/internal/cryptocore"
"github.com/rfjakob/gocryptfs/internal/ctlsock"
"github.com/rfjakob/gocryptfs/internal/exitcodes"
"github.com/rfjakob/gocryptfs/internal/fusefrontend"
"github.com/rfjakob/gocryptfs/internal/fusefrontend_reverse"
+ "github.com/rfjakob/gocryptfs/internal/nametransform"
"github.com/rfjakob/gocryptfs/internal/readpassword"
"github.com/rfjakob/gocryptfs/internal/tlog"
)
@@ -182,6 +185,13 @@ func setOpenFileLimit() {
}
}
+// ctlsockFs satisfies both the pathfs.FileSystem and the ctlsock.Interface
+// interfaces
+type ctlsockFs interface {
+ pathfs.FileSystem
+ ctlsock.Interface
+}
+
// initFuseFrontend - initialize gocryptfs/fusefrontend
// Calls os.Exit on errors
func initFuseFrontend(masterkey []byte, args *argContainer, confFile *configfile.ConfFile) *fuse.Server {
@@ -203,11 +213,8 @@ func initFuseFrontend(masterkey []byte, args *argContainer, confFile *configfile
Cipherdir: args.cipherdir,
PlaintextNames: args.plaintextnames,
LongNames: args.longnames,
- CryptoBackend: cryptoBackend,
ConfigCustom: args._configCustom,
- Raw64: args.raw64,
NoPrealloc: args.noprealloc,
- HKDF: args.hkdf,
SerializeReads: args.serialize_reads,
ForceDecode: args.forcedecode,
ForceOwner: args._forceOwner,
@@ -216,10 +223,10 @@ func initFuseFrontend(masterkey []byte, args *argContainer, confFile *configfile
if confFile != nil {
// Settings from the config file override command line args
frontendArgs.PlaintextNames = confFile.IsFeatureFlagSet(configfile.FlagPlaintextNames)
- frontendArgs.Raw64 = confFile.IsFeatureFlagSet(configfile.FlagRaw64)
- frontendArgs.HKDF = confFile.IsFeatureFlagSet(configfile.FlagHKDF)
+ args.raw64 = confFile.IsFeatureFlagSet(configfile.FlagRaw64)
+ args.hkdf = confFile.IsFeatureFlagSet(configfile.FlagHKDF)
if confFile.IsFeatureFlagSet(configfile.FlagAESSIV) {
- frontendArgs.CryptoBackend = cryptocore.BackendAESSIV
+ cryptoBackend = cryptocore.BackendAESSIV
} else if args.reverse {
tlog.Fatal.Printf("AES-SIV is required by reverse mode, but not enabled in the config file")
os.Exit(exitcodes.Usage)
@@ -232,8 +239,6 @@ func initFuseFrontend(masterkey []byte, args *argContainer, confFile *configfile
}
jsonBytes, _ := json.MarshalIndent(frontendArgs, "", "\t")
tlog.Debug.Printf("frontendArgs: %s", string(jsonBytes))
- var finalFs pathfs.FileSystem
- var ctlSockBackend ctlsock.Interface
// pathFsOpts are passed into go-fuse/pathfs
pathFsOpts := &pathfs.PathNodeFsOptions{ClientInodes: true}
if args.sharedstorage {
@@ -242,21 +247,23 @@ func initFuseFrontend(masterkey []byte, args *argContainer, confFile *configfile
// https://github.com/rfjakob/gocryptfs/issues/156
pathFsOpts.ClientInodes = false
}
+ // Init crypto backend
+ cCore := cryptocore.New(masterkey, cryptoBackend, contentenc.DefaultIVBits, args.hkdf, args.forcedecode)
+ cEnc := contentenc.New(cCore, contentenc.DefaultBS, args.forcedecode)
+ nameTransform := nametransform.New(cCore.EMECipher, frontendArgs.LongNames, args.raw64)
+ // Spawn fusefrontend
+ var fs ctlsockFs
if args.reverse {
- // The dance with the intermediate variables is because we need to
- // cast the FS into pathfs.FileSystem *and* ctlsock.Interface. This
- // avoids using interface{}.
- fs := fusefrontend_reverse.NewFS(masterkey, frontendArgs)
- finalFs = fs
- ctlSockBackend = fs
+ if cryptoBackend != cryptocore.BackendAESSIV {
+ log.Panic("reverse mode must use AES-SIV, everything else is insecure")
+ }
+ fs = fusefrontend_reverse.NewFS(frontendArgs, cEnc, nameTransform)
// Reverse mode is read-only, so we don't need a working link().
// Disable hard link tracking to avoid strange breakage on duplicate
// inode numbers ( https://github.com/rfjakob/gocryptfs/issues/149 ).
pathFsOpts.ClientInodes = false
} else {
- fs := fusefrontend.NewFS(masterkey, frontendArgs)
- finalFs = fs
- ctlSockBackend = fs
+ fs = fusefrontend.NewFS(frontendArgs, cEnc, nameTransform)
}
// fusefrontend / fusefrontend_reverse have initialized their crypto with
// derived keys (HKDF), we can purge the master key from memory.
@@ -266,9 +273,9 @@ func initFuseFrontend(masterkey []byte, args *argContainer, confFile *configfile
// We have opened the socket early so that we cannot fail here after
// asking the user for the password
if args._ctlsockFd != nil {
- go ctlsock.Serve(args._ctlsockFd, ctlSockBackend)
+ go ctlsock.Serve(args._ctlsockFd, fs)
}
- pathFs := pathfs.NewPathNodeFs(finalFs, pathFsOpts)
+ pathFs := pathfs.NewPathNodeFs(fs, pathFsOpts)
var fuseOpts *nodefs.Options
if args.sharedstorage {
// sharedstorage mode sets all cache timeouts to zero so changes to the