mirror of
https://github.com/goharbor/harbor.git
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101 lines
2.6 KiB
Go
101 lines
2.6 KiB
Go
/*
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Copyright (c) 2016 VMware, Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package utils
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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"crypto/sha1"
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"encoding/base64"
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"errors"
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"fmt"
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"io"
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"strings"
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"golang.org/x/crypto/pbkdf2"
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)
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// Encrypt encrypts the content with salt
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func Encrypt(content string, salt string) string {
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return fmt.Sprintf("%x", pbkdf2.Key([]byte(content), []byte(salt), 4096, 16, sha1.New))
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}
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const (
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// EncryptHeaderV1 ...
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EncryptHeaderV1 = "<enc-v1>"
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)
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// ReversibleEncrypt encrypts the str with aes/base64
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func ReversibleEncrypt(str, key string) (string, error) {
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keyBytes := []byte(key)
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var block cipher.Block
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var err error
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if block, err = aes.NewCipher(keyBytes); err != nil {
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return "", err
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}
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cipherText := make([]byte, aes.BlockSize+len(str))
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iv := cipherText[:aes.BlockSize]
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if _, err = io.ReadFull(rand.Reader, iv); err != nil {
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return "", err
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}
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cfb := cipher.NewCFBEncrypter(block, iv)
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cfb.XORKeyStream(cipherText[aes.BlockSize:], []byte(str))
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encrypted := EncryptHeaderV1 + base64.StdEncoding.EncodeToString(cipherText)
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return encrypted, nil
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}
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// ReversibleDecrypt decrypts the str with aes/base64 or base 64 depending on "header"
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func ReversibleDecrypt(str, key string) (string, error) {
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if strings.HasPrefix(str, EncryptHeaderV1) {
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str = str[len(EncryptHeaderV1):]
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return decryptAES(str, key)
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}
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//fallback to base64
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return decodeB64(str)
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}
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func decodeB64(str string) (string, error) {
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cipherText, err := base64.StdEncoding.DecodeString(str)
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return string(cipherText), err
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}
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func decryptAES(str, key string) (string, error) {
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keyBytes := []byte(key)
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var block cipher.Block
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var cipherText []byte
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var err error
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if block, err = aes.NewCipher(keyBytes); err != nil {
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return "", err
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}
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if cipherText, err = base64.StdEncoding.DecodeString(str); err != nil {
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return "", err
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}
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if len(cipherText) < aes.BlockSize {
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err = errors.New("cipherText too short")
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return "", err
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}
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iv := cipherText[:aes.BlockSize]
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cipherText = cipherText[aes.BlockSize:]
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cfb := cipher.NewCFBDecrypter(block, iv)
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cfb.XORKeyStream(cipherText, cipherText)
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return string(cipherText), nil
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}
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