Golang 从 NodeJS 解密 AES 256 CBC base64

Question

这是我在 Node.js 中所拥有的：

var crypto = require('crypto')

function encryptstring(str) {
    var cipher = crypto.createCipheriv('aes-256-cbc', 'NFd6N3v1nbL47FK0xpZjxZ7NY4fYpNYd', 'TestingIV1234567'),
        encrypted = cipher.update(str, 'utf-8', 'base64');
    encrypted += cipher.final('base64');
    return encrypted;
}

console.log(encryptstring("Testing 111111111111111111111111111111111111111111"))

那返回： w2f0vBP2hRfgVqssqOluk68Qxkc9LXFESc0ZGzPBq3p6f/x/LbwBbg1XOoRr7I/DAtESJGdweKG6nL9m8RfewA==

这是我在 Go 中所拥有的：

package main

import (
    "crypto/aes"
    "crypto/cipher"
    "encoding/base64"
    "fmt"
)

// decrypt from base64 to decrypted string
func decrypt(key []byte, iv []byte, cryptoText string) string {
    ciphertext, _ := base64.URLEncoding.DecodeString(cryptoText)
    block, err := aes.NewCipher(key)
    if err != nil {
        panic(err)
    }
    if len(ciphertext) < aes.BlockSize {
        panic("ciphertext too short")
    }

    ciphertext = ciphertext[aes.BlockSize:]
    stream := cipher.NewCFBDecrypter(block, iv)
    stream.XORKeyStream(ciphertext, ciphertext)

    return fmt.Sprintf("%s", ciphertext)
}

func main() {
    encKey := "NFd6N3v1nbL47FK0xpZjxZ7NY4fYpNYd"
    iv := "TestingIV1234567"
    stringtodecrypt := "w2f0vBP2hRfgVqssqOluk68Qxkc9LXFESc0ZGzPBq3p6f/x/LbwBbg1XOoRr7I/DAtESJGdweKG6nL9m8RfewA=="

    stringtodecrypt = decrypt([]byte(encKey), []byte(iv), stringtodecrypt)

    fmt.Println(string(stringtodecrypt))
}

最终返回 _???6??d,O?ob"?

很多 Go 代码摘自https://gist.github.com/manishtpatel/8222606

我也试过这个：如何在 golang 中解密在 nodejs 中加密的 AES256 位密码？（hex.DecodeString在这种情况下不需要进行一些修改）但它会抛出一个错误说panic: crypto/cipher: input not full blocks

这是我尝试时的代码：

func main() {
    encKey := "NFd6N3v1nbL47FK0xpZjxZ7NY4fYpNYd"
    iv := "TestingIV1234567"
    stringtodecrypt := "w2f0vBP2hRfgVqssqOluk68Qxkc9LXFESc0ZGzPBq3p6f/x/LbwBbg1XOoRr7I/DAtESJGdweKG6nL9m8RfewA=="

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

    mode := cipher.NewCBCDecrypter(block, []byte(iv))

    mode.CryptBlocks([]byte(stringtodecrypt), []byte(stringtodecrypt))

    fmt.Println(string(stringtodecrypt))
}

我已经搜索了很多，我似乎无法弄清楚这一点。

我究竟做错了什么？

Answer 1

您的第二次尝试更接近，但您没有先解码 base64 字符串。

如果您按照 cipher 包中的CBCDecrypter示例进行操作，您将得到如下内容：

encKey := "NFd6N3v1nbL47FK0xpZjxZ7NY4fYpNYd"
iv := "TestingIV1234567"
ciphertext, err := base64.StdEncoding.DecodeString("w2f0vBP2hRfgVqssqOluk68Qxkc9LXFESc0ZGzPBq3p6f/x/LbwBbg1XOoRr7I/DAtESJGdweKG6nL9m8RfewA==")
if err != nil {
    panic(err)
}

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

if len(ciphertext)%aes.BlockSize != 0 {
    panic("ciphertext is not a multiple of the block size")
}

mode := cipher.NewCBCDecrypter(block, []byte(iv))
mode.CryptBlocks(ciphertext, ciphertext)

fmt.Printf("%s\n", ciphertext)

https://play.golang.org/p/16wV2UJ5Iw