使用AES 256 CTR和Golang中的Decrypting在Node JS中加密

时间:2017-12-08 19:21:48

标签: node.js go encryption cryptography aes

我使用以下Node JS代码加密了一些JSON Text: -

var algorithm = 'aes-256-ctr';
var crypto = require('crypto');

var password = "6A80FD8D38D579D1090F6CDB62C729311781E4BA31CD7D804BD7BF5AEC3BFC2D"

var typedRequest = {"abc":"cde"}

var cipher = crypto.createCipher(algorithm, password);
var hashRequest = cipher.update(JSON.stringify(typedRequest),
    'utf8', 'hex');
hashRequest += cipher.final('hex');

现在,我想在Golang中解密这个encryptedText。但是我无法找到任何方法来实现这一点,因为在Golang的几乎所有AES 256 CTR的解密逻辑示例中,我发现它在解密时总是需要IV但我在Node JS中没有使用相同的。我已经在Golang中写了一些东西,但它没有正确解密并且现在给出错误: -

package main

import (
    "crypto/aes"
    "crypto/cipher"
    "encoding/hex"
    "fmt"

)

func main() {

    encKey := "6A80FD8D38D579D1090F6CDB62C729311781E4BA31CD7D804BD7BF5AEC3BFC2D"
    cipherText := "746c17cd10f8f86646f843ac2a"

    encKeyDecoded, err := hex.DecodeString(encKey)
    if err != nil {
        panic(err)
    }
    cipherTextDecoded, err := hex.DecodeString(cipherText)
    if err != nil {
        panic(err)
    }

    iv := cipherTextDecoded[:aes.BlockSize]

    block, err := aes.NewCipher([]byte(encKeyDecoded))
    if err != nil {
        panic(err)
    }

    cipherTextBytes := []byte(cipherTextDecoded)

    plaintext := make([]byte, len(cipherTextBytes) - aes.BlockSize)
    stream := cipher.NewCTR(block, iv)
    stream.XORKeyStream(plaintext, cipherTextBytes[aes.BlockSize:])

    fmt.Println(string(plaintext))
}

我们非常感谢您获取正确的Golang代码的任何帮助。感谢

=====================================

现在,我在接受答案的建议后更新了以下内容: -

这是我的节点js代码: -

var crypto = require('crypto'),
  algorithm = 'aes-256-ctr',
  password = '6A80FD8D38D579D1090F6CDB62CA34CA',
  // do not use a global iv for production, 
  // generate a new one for each encryption
  iv = '79b67e539e7fcadf'

var typedRequest = {"abc":"cde"}

var cipher = crypto.createCipheriv(algorithm, password, iv);
var hashRequest = cipher.update(JSON.stringify(typedRequest),
    'utf8', 'hex');
hashRequest += iv.toString('hex') + cipher.final('hex');

这是我的Go代码: -

package main

import (
    "crypto/aes"
    "crypto/cipher"
    "encoding/hex"
    "fmt"

)

func main() {

    encKey := "6A80FD8D38D579D1090F6CDB62CA34CA"
    cipherText := "af7d1eb42107549a7e3adbce1a79b67e539e7fcadf" // Got from above

    encKeyDecoded, err := hex.DecodeString(encKey)
    if err != nil {
        panic(err)
    }
    cipherTextDecoded, err := hex.DecodeString(cipherText)
    if err != nil {
        panic(err)
    }

    block, err := aes.NewCipher([]byte(encKeyDecoded))
    if err != nil {
        panic(err)
    }

    iv := cipherTextDecoded[:aes.BlockSize]
    cipherTextBytes := []byte(cipherTextDecoded)

    plaintext := make([]byte, len(cipherTextBytes) - aes.BlockSize)
    stream := cipher.NewCTR(block, iv)
    stream.XORKeyStream(plaintext, cipherTextBytes[aes.BlockSize:])

    fmt.Println(string(plaintext))
}

现在,我正在以解密的形式获得完全不同的东西。

1 个答案:

答案 0 :(得分:3)

您的NodeJS代码不正确。 CTR模式需要IV,调用crypto.createCipher是CTR模式的未定义行为。

根据Crypto的NodeJS文档,您应该使用crypto.createCipheriv。您的Golang代码尝试从明文开头检索此IV,因此您需要将其放在NodeJS代码中。

对于每个加密操作,IV应该是唯一的,建议使用CSPRNG。