libgocryptfs/info.go
Jakob Unterwurzacher 1e598e96fc main: add "-info" option
Pretty-prints the config while stripping out sensitive
(and uninteresting) data

https://github.com/rfjakob/gocryptfs/issues/111
2017-05-30 19:01:32 +02:00

46 lines
1.3 KiB
Go

package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"strings"
"github.com/rfjakob/gocryptfs/internal/configfile"
"github.com/rfjakob/gocryptfs/internal/contentenc"
"github.com/rfjakob/gocryptfs/internal/exitcodes"
"github.com/rfjakob/gocryptfs/internal/tlog"
)
// info pretty-prints the contents of the config file at "filename" for human
// consumption, stripping out sensitive data.
// This is called when you pass the "-info" option.
func info(filename string) {
// Read from disk
js, err := ioutil.ReadFile(filename)
if err != nil {
tlog.Fatal.Printf("info: ReadFile: %#v\n", err)
os.Exit(exitcodes.LoadConf)
}
// Unmarshal
var cf configfile.ConfFile
err = json.Unmarshal(js, &cf)
if err != nil {
tlog.Fatal.Printf("Failed to unmarshal config file")
os.Exit(exitcodes.LoadConf)
}
if cf.Version != contentenc.CurrentVersion {
tlog.Fatal.Printf("Unsupported on-disk format %d", cf.Version)
os.Exit(exitcodes.LoadConf)
}
// Pretty-print
fmt.Printf("Creator: %s\n", cf.Creator)
fmt.Printf("FeatureFlags: %s\n", strings.Join(cf.FeatureFlags, " "))
fmt.Printf("EncryptedKey: %dB\n", len(cf.EncryptedKey))
s := cf.ScryptObject
fmt.Printf("ScryptObject: Salt=%dB N=%d R=%d P=%d KeyLen=%d\n",
len(s.Salt), s.N, s.R, s.P, s.KeyLen)
os.Exit(0)
}