[英]Encrypt RijndaelManaged 128 in unity c# and Decrypt in Node.JS
我正在尋找一種在統一c#中加密字節數組並在node.js服務器上解密的方法。
我對這兩種方法的任何實現都持開放態度,但是我目前使用以下代碼進行統一加密/解密,但是我收到錯誤消息:
TypeError: error:0606506D:digital envelope routines:EVP_DecryptFinal_ex:wrong final block length
使用RijndaelManaged 128解密統一加密的文件時
在下面找到加密和解密代碼:
Unity C#加密
private void GenerateEncryptionKey(string userID)
{
//Generate the Salt, with any custom logic and using the user's ID
StringBuilder salt = new StringBuilder();
for (int i = 0; i < 8; i++)
{
salt.Append("," + userID.Length.ToString());
}
Rfc2898DeriveBytes pwdGen = new Rfc2898DeriveBytes (Encoding.UTF8.GetBytes(userID), Encoding.UTF8.GetBytes(salt.ToString()), 100);
m_cryptoKey = pwdGen.GetBytes(KEY_SIZE / 8);
m_cryptoIV = pwdGen.GetBytes(KEY_SIZE / 8);
}
public void Save(string path)
{
string json = MiniJSON.Json.Serialize(m_saveData);
using (RijndaelManaged crypto = new RijndaelManaged())
{
crypto.BlockSize = KEY_SIZE;
crypto.Padding = PaddingMode.PKCS7;
crypto.Key = m_cryptoKey;
crypto.IV = m_cryptoIV;
crypto.Mode = CipherMode.CBC;
ICryptoTransform encryptor = crypto.CreateEncryptor(crypto.Key, crypto.IV);
byte[] compressed = null;
using (MemoryStream compMemStream = new MemoryStream())
{
using (StreamWriter writer = new StreamWriter(compMemStream, Encoding.UTF8))
{
writer.Write(json);
writer.Close();
compressed = compMemStream.ToArray();
}
}
if (compressed != null)
{
using (MemoryStream encMemStream = new MemoryStream(compressed))
{
using (CryptoStream cryptoStream = new CryptoStream(encMemStream, encryptor, CryptoStreamMode.Write))
{
using (FileStream fs = File.Create(GetSavePath(path)))
{
byte[] encrypted = encMemStream.ToArray();
fs.Write(encrypted, 0, encrypted.Length);
fs.Close();
}
}
}
}
}
}
忽略壓縮位,我最終將壓縮數據以進行加密,但在此示例中已將其刪除。
Node.JS解密
var sUserID = "hello-me";
var sSalt = "";
for (var i = 0; i < 8; i++)
{
sSalt += "," + sUserID.length;
}
var KEY_SIZE = 128;
crypto.pbkdf2(sUserID, sSalt, 100, KEY_SIZE / 4, function(cErr, cBuffer){
var cKey = cBuffer.slice(0, cBuffer.length / 2);
var cIV = cBuffer.slice(cBuffer.length / 2, cBuffer.length);
fs.readFile("save.sav", function (cErr, cData){
try
{
var cDecipher = crypto.createDecipheriv("AES-128-CBC", cKey, cIV);
var sDecoded = cDecipher.update(cData, null, "utf8");
sDecoded += cDecipher.final("utf8");
console.log(sDecoded);
}
catch(e)
{
console.log(e.message);
console.log(e.stack);
}
});
});
我相信問題與填充有關! 我沒有使用:
cryptoStream.FlushFinalBlock();
當將文件保存在c#土地中時,因為執行該操作后由於某種原因c#不能再對其解密,並且它對節點解密它的能力也沒有真正的影響,但是也許我只是在其中丟失了一些東西用填充解密嗎?
任何幫助表示贊賞
一個問題是您使用的PasswordDeriveBytes
根據本文是用於PBKDF1,而Rfc2898DeriveBytes
是用於PBKDF2。 您在節點腳本中使用PBKDF2。
然后,您應該檢查C#和節點之間的cKey和cIV值是否匹配。
好的,在使用RijndaelManaged進行加密和解密時,操作順序似乎非常重要。
以下是在Unity中進行加密和解密的代碼,並且可以與問題中發布的node.js代碼一起使用。
public void Save(string path)
{
string json = MiniJSON.Json.Serialize(m_saveData);
using (RijndaelManaged crypto = new RijndaelManaged())
{
crypto.BlockSize = KEY_SIZE;
crypto.Padding = PaddingMode.PKCS7;
crypto.Key = m_cryptoKey;
crypto.IV = m_cryptoIV;
crypto.Mode = CipherMode.CBC;
ICryptoTransform encryptor = crypto.CreateEncryptor(crypto.Key, crypto.IV);
byte[] compressed = null;
using (MemoryStream compMemStream = new MemoryStream())
{
using (StreamWriter writer = new StreamWriter(compMemStream, Encoding.UTF8))
{
writer.Write(json);
writer.Close();
//compressed = CLZF2.Compress(compMemStream.ToArray());
compressed = compMemStream.ToArray();
}
}
if (compressed != null)
{
using (MemoryStream encMemStream = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(encMemStream, encryptor, CryptoStreamMode.Write))
{
cryptoStream.Write(compressed, 0, compressed.Length);
cryptoStream.FlushFinalBlock();
using (FileStream fs = File.Create(GetSavePath(path)))
{
encMemStream.WriteTo(fs);
}
}
}
}
}
}
public void Load(string path)
{
path = GetSavePath(path);
try
{
byte[] decrypted = null;
using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
{
using (RijndaelManaged crypto = new RijndaelManaged())
{
crypto.BlockSize = KEY_SIZE;
crypto.Padding = PaddingMode.PKCS7;
crypto.Key = m_cryptoKey;
crypto.IV = m_cryptoIV;
crypto.Mode = CipherMode.CBC;
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = crypto.CreateDecryptor(crypto.Key, crypto.IV);
using (CryptoStream cryptoStream = new CryptoStream(fs, decryptor, CryptoStreamMode.Read))
{
using (MemoryStream decMemStream = new MemoryStream())
{
var buffer = new byte[512];
var bytesRead = 0;
while ((bytesRead = cryptoStream.Read(buffer, 0, buffer.Length)) > 0)
{
decMemStream.Write(buffer, 0, bytesRead);
}
//decrypted = CLZF2.Decompress(decMemStream.ToArray());
decrypted = decMemStream.ToArray();
}
}
}
}
if (decrypted != null)
{
using (MemoryStream jsonMemoryStream = new MemoryStream(decrypted))
{
using (StreamReader reader = new StreamReader(jsonMemoryStream))
{
string json = reader.ReadToEnd();
Dictionary<string, object> saveData = MiniJSON.Json.Deserialize(json) as Dictionary<string, object>;
if (saveData != null)
{
m_saveData = saveData;
}
else
{
Debug.LogWarning("Trying to load invalid JSON file at path: " + path);
}
}
}
}
}
catch (FileNotFoundException e)
{
Debug.LogWarning("No save file found at path: " + path);
}
}
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