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59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
// Copyright 2016 Documize Inc. <legal@documize.com>. All rights reserved.
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//
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// This software (Documize Community Edition) is licensed under
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// GNU AGPL v3 http://www.gnu.org/licenses/agpl-3.0.en.html
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//
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// You can operate outside the AGPL restrictions by purchasing
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// Documize Enterprise Edition and obtaining a commercial license
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// by contacting <sales@documize.com>.
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//
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// https://documize.com
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package secrets
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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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"errors"
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"io"
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)
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var key = []byte("8456FHkQW1566etydT46jk39ghjfFhg4") // 32 bytes
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// MakeAES creates an AES encryption of of a given string,
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// using a hard-wired key value,
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// suitable for use as an authentication token.
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func MakeAES(secret string) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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b := EncodeBase64([]byte(secret))
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ciphertext := make([]byte, aes.BlockSize+len(b))
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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 nil, err
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}
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cfb := cipher.NewCFBEncrypter(block, iv)
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cfb.XORKeyStream(ciphertext[aes.BlockSize:], b)
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return ciphertext, nil
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}
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// DecryptAES decrypts an AES encoded []byte,
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// using a hard-wired key value,
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// suitable for use when reading an authentication token.
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func DecryptAES(text []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, errors.New("aes.NewCipher failure: " + err.Error())
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}
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if len(text) < aes.BlockSize {
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return nil, errors.New("ciphertext too short")
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}
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iv := text[:aes.BlockSize]
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text = text[aes.BlockSize:]
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cfb := cipher.NewCFBDecrypter(block, iv)
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cfb.XORKeyStream(text, text)
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return DecodeBase64(text)
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}
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