password.go

/*
Copyright 2019 The Crossplane Authors.

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 (
	"crypto/rand"
	"encoding/base64"
	"encoding/hex"
)

// GeneratePassword generates a password using random data of the given length, then encodes to
// a base64 string.
func GeneratePassword(dataLen int) (string, error) {
	randData, err := generateRandomData(dataLen)
	if err != nil {
		return "", err
	}

	return base64.RawURLEncoding.EncodeToString(randData), nil
}

// GenerateHex generates a hex string using random data of the given length.
func GenerateHex(dataLen int) (string, error) {
	randData, err := generateRandomData(dataLen)
	if err != nil {
		return "", err
	}

	return hex.EncodeToString(randData), nil
}

func generateRandomData(dataLen int) ([]byte, error) {
	randData := make([]byte, dataLen)
	if _, err := rand.Read(randData); err != nil {
		return nil, err
	}

	return randData, nil
}