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package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"strings"
"github.com/rfjakob/gocryptfs/v2/internal/configfile"
"github.com/rfjakob/gocryptfs/v2/internal/contentenc"
"github.com/rfjakob/gocryptfs/v2/internal/exitcodes"
"github.com/rfjakob/gocryptfs/v2/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("Reading config file failed: %v", 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)
}
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