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wakapi/config/key_utils.go

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package config
import (
"github.com/emvi/logbuch"
"github.com/gorilla/securecookie"
"io"
"os"
"path/filepath"
)
func getTemporarySecureKeys() (hashKey, blockKey []byte) {
keyFile := filepath.Join(os.TempDir(), ".wakapi-dev-keys")
// key file already exists
if _, err := os.Stat(keyFile); err == nil {
file, err := os.Open(keyFile)
if err != nil {
logbuch.Fatal("failed to open dev keys file, %v", err)
}
defer file.Close()
combinedKey, err := io.ReadAll(file)
if err != nil {
logbuch.Fatal("failed to read key from file")
}
return combinedKey[:32], combinedKey[32:64]
}
// otherwise, generate random keys and save them
file, err := os.OpenFile(keyFile, os.O_CREATE|os.O_WRONLY, 0600)
if err != nil {
logbuch.Fatal("failed to open dev keys file, %v", err)
}
defer file.Close()
combinedKey := securecookie.GenerateRandomKey(64)
if _, err := file.Write(combinedKey); err != nil {
logbuch.Fatal("failed to write key to file")
}
return combinedKey[:32], combinedKey[32:64]
}