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Diffstat (limited to 'internal/configfile/config_file.go')
-rw-r--r--internal/configfile/config_file.go26
1 files changed, 24 insertions, 2 deletions
diff --git a/internal/configfile/config_file.go b/internal/configfile/config_file.go
index fea4a84..67d67f0 100644
--- a/internal/configfile/config_file.go
+++ b/internal/configfile/config_file.go
@@ -5,7 +5,9 @@ package configfile
import (
"encoding/json"
"fmt"
+ "io"
"io/ioutil"
+ "log"
"github.com/rfjakob/gocryptfs/internal/contentenc"
"github.com/rfjakob/gocryptfs/internal/cryptocore"
@@ -47,10 +49,25 @@ type ConfFile struct {
filename string
}
+// randBytesDevRandom gets "n" random bytes from /dev/random or panics
+func randBytesDevRandom(n int) []byte {
+ f, err := os.Open("/dev/random")
+ if err != nil {
+ log.Panic("Failed to open /dev/random: " + err.Error())
+ }
+ defer f.Close()
+ b := make([]byte, n)
+ _, err = io.ReadFull(f, b)
+ if err != nil {
+ log.Panic("Failed to read random bytes: " + err.Error())
+ }
+ return b
+}
+
// CreateConfFile - create a new config with a random key encrypted with
// "password" and write it to "filename".
// Uses scrypt with cost parameter logN.
-func CreateConfFile(filename string, password string, plaintextNames bool, logN int, creator string, aessiv bool) error {
+func CreateConfFile(filename string, password string, plaintextNames bool, logN int, creator string, aessiv bool, devrandom bool) error {
var cf ConfFile
cf.filename = filename
cf.Creator = creator
@@ -72,7 +89,12 @@ func CreateConfFile(filename string, password string, plaintextNames bool, logN
}
// Generate new random master key
- key := cryptocore.RandBytes(cryptocore.KeyLen)
+ var key []byte
+ if devrandom {
+ key = randBytesDevRandom(cryptocore.KeyLen)
+ } else {
+ key = cryptocore.RandBytes(cryptocore.KeyLen)
+ }
// Encrypt it using the password
// This sets ScryptObject and EncryptedKey