passphrase.go

// Copyright © 2020 Weald Technology Trading
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package util

import (
	zxcvbn "github.com/nbutton23/zxcvbn-go"
	"github.com/spf13/viper"
)

// minPassphraseScore is the minimum acceptable passphrase score.
const minPassphraseScore = 2

// AcceptablePassphrase returns true if the passphrase is acceptable.
func AcceptablePassphrase(passphrase string) bool {
	if viper.GetBool("allow-weak-passphrases") {
		return true
	}
	res := zxcvbn.PasswordStrength(passphrase, nil)
	return res.Score >= minPassphraseScore
}