Question

我在控制器中对AES CBC加密字符串（json）进行了解密，但解密后的字符串部分错误：为什么/如何？

首先我在javascript中加密填充的json（使用aes-js）：

AddPaddingText(text, size) {
    text += " ".repeat(size - text.length % size);
    return text;
}
Encrypt(decyphered, size) {
    var padded = this.AddPaddingText(decyphered, size);
    var textBytes = aesjs.utils.utf8.toBytes(padded);
    var encryptedBytes = this.aesCyCtr.encrypt(textBytes);
    return aesjs.utils.hex.fromBytes(encryptedBytes);
}
var json = JSON.stringify([this.emailFieldValue, this.textFieldValue]);
this.cyphjson = this.Encrypt(json, 128);

this.cyphjson被发送到api，然后：

    [Route("/contact/decrypt")]
    public IActionResult DecryptMessage(string message)
    {
        if (message is null)
            return Content($"null message");
        _aes.Padding = PaddingMode.None;
        var messageBytes = HexToBytes(message);
        using (var target = new MemoryStream())
        {
            using (var cs = new CryptoStream(target, _aes.CreateDecryptor(), CryptoStreamMode.Write))
            {
                cs.Write(messageBytes, 0, messageBytes.Length);
                cs.FlushFinalBlock();
            }
            var dbMessage = MemoryStreamToMessage(target);
            var jsonOut = JsonConvert.SerializeObject(dbMessage);
            return Content(jsonOut, "application/json");
        }
    }

    private static Message MemoryStreamToMessage(MemoryStream stream)
    {
        var text = Encoding.Default.GetString(stream.ToArray()).TrimEnd();
        var jarray = (JArray)JsonConvert.DeserializeObject(text); //EXCEPTION HERE
        var list = jarray.ToObject<List<string>>();
        var storableMessage = new Message { Body = list[1], Email = list[0], Date = DateTime.Now };
        return storableMessage;
    }

    public static byte[] HexToBytes(string hex)
    {
        if (hex.Length % 2 == 1)
            throw new Exception("Hex string must have even number of digits");
        byte[] arr = new byte[hex.Length >> 1];
        for (int i = 0; i < hex.Length >> 1; ++i)
            arr[i] = (byte)((GetHexVal(hex[i << 1]) << 4) + (GetHexVal(hex[(i << 1) + 1])));
        return arr;
    }

    public static int GetHexVal(char hex)
    {
        int val = hex;
        return val - (val < 58 ? 48 : 87);
    }

在MemoryStreamToMessage中，text有症状;所以我得到这种字符串：

“ 0 T. z \u000f 8 ”，“我的信息已满\”]“

而不是：

[“sender@server.com”，“我的消息已满”]

对我来说，在编码中看起来像是字节的变化，但我在两侧都使用了byte [] - UTF8转换。任何一个人？

c＃+ js堆栈中部分错误的编码/解密（AES）

0 个答案: