AES CBC：JavaScript/CryptoJS加密->Golang解密

Question

注意：这只是为个人使用和学习，我不是试图滚动我自己的加密为公众使用。

我需要AES256加密一个字符串，但是我当前的尝试在十六进制解码时最终得到了一个类似salted__vaill？8xcqlyserver side的字符串。当十六进制解码时，它应该是一个有效的utf8 base64字符串，然后可以将其解码为原始字符串。这与这里提供的解决方案类似，但是salt并不是实际问题（尽管答案被接受），并且我无法在使用之前通过十六进制解码iv来抑制salt op（正如它所建议的）。有办法做到这一点吗？

// CryptoJS.pad.NoPadding={pad:function(){},unpad:function(){}};

const SECRET = '394812730425442A472D2F423F452848';
const iv = crypto.getRandomValues(new Uint8Array(16));    

function enc(plainText) {
  var b64 = CryptoJS.AES.encrypt(plainText, SECRET, { 
  	iv,
    mode: CryptoJS.mode.CBC,
    // padding: CryptoJS.pad.NoPadding
  }).toString();

  // Don't need?
  //var e64 = CryptoJS.enc.Base64.parse(b64);
  //var eHex = e64.toString(CryptoJS.enc.Hex);
  console.log("b64::", b64);

  return b64;
}

enc("SUPA_SECRET");

<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>

package main

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

func main() {
    JS_GEN := "U2FsdGVkX1+CA3LZTXePlgoGqL8VkdgiDgUenZhH4kc="
    SECRET := "394812730425442A472D2F423F452848"
    //msg := "SUPER_SECRET"

    res, err := DecryptCBC(SECRET, JS_GEN)
    if err != nil {
        fmt.Println(err)
    }

    fmt.Println("res::", res)
}

func DecryptCBC(secret string, target string) (string, error) {
    nilString := ""
    key, _ := hex.DecodeString(secret)
    //ciphertext, err := base64.URLEncoding.DecodeString(target)

    // Decode base64 string
    ciphertext, err := base64.StdEncoding.DecodeString(target)
    if err != nil {
        return nilString, err
    }

    // Create new cipher block
    block, err := aes.NewCipher(key)
    if err != nil {
        return nilString, err
    }

    // The IV needs to be unique, but not secure. Therefore it's common to
    // include it at the beginning of the ciphertext.
    if len(ciphertext) < aes.BlockSize {
        panic("ciphertext too short")
    }
    iv := ciphertext[:aes.BlockSize]
    ciphertext = ciphertext[aes.BlockSize:]

    // CBC mode always works in whole blocks.
    if len(ciphertext)%aes.BlockSize != 0 {
        panic("ciphertext is not a multiple of the block size")
    }
    mode := cipher.NewCBCDecrypter(block, iv)

    // CryptBlocks can work in-place if the two arguments are the same.
    mode.CryptBlocks(ciphertext, ciphertext)
    fmt.Println("ciphertext::", ciphertext)

    // Output: exampleplaintext
    return string(ciphertext), nil
}

ciphertext:: [136 227 244 124 124 92 162 254 1 147 235 213 8 136 129 150]
res:: ���||\�������

Answer 1

您似乎在JavaScript中使用CBC模式（默认），但在Golang中使用CFB。请改用newcbcdecrypter。