我正在尝试用 C# 和 Javascript 编写两个类，我可以在整个项目中使用它们在交换数据时使用 AES 加密或解密数据。
使用 AES，我将 Salt（32 字节）和 IV（16 字节）嵌入到加密结果中，这在测试时分别适用于这两个类。将 Salt 和 IV 添加到混合中并不会带来很多参考来让这在两个平台之间工作。
对于 C#，我使用标准 System.Security.Crypthography.AES
private static readonly int iterations = 1000;
public static string Encrypt(string input, string password)
{
byte[] encrypted;
byte[] IV;
byte[] Salt = GetSalt();
byte[] Key = CreateKey(password, Salt);
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.Padding = PaddingMode.PKCS7;
aesAlg.Mode = CipherMode.CBC;
aesAlg.GenerateIV();
IV = aesAlg.IV;
var encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (var msEncrypt = new MemoryStream())
{
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (var swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(input);
}
encrypted = msEncrypt.ToArray();
}
}
}
byte[] combinedIvSaltCt = new byte[Salt.Length + IV.Length + encrypted.Length];
Array.Copy(Salt, 0, combinedIvSaltCt, 0, Salt.Length);
Array.Copy(IV, 0, combinedIvSaltCt, Salt.Length, IV.Length);
Array.Copy(encrypted, 0, combinedIvSaltCt, Salt.Length + IV.Length, encrypted.Length);
return Convert.ToBase64String(combinedIvSaltCt.ToArray());
}
public static string Decrypt(string input, string password)
{
byte[] inputAsByteArray;
string plaintext = null;
try
{
inputAsByteArray = Convert.FromBase64String(input);
byte[] Salt = new byte[32];
byte[] IV = new byte[16];
byte[] Encoded = new byte[inputAsByteArray.Length - Salt.Length - IV.Length];
Array.Copy(inputAsByteArray, 0, Salt, 0, Salt.Length);
Array.Copy(inputAsByteArray, Salt.Length, IV, 0, IV.Length);
Array.Copy(inputAsByteArray, Salt.Length + IV.Length, Encoded, 0, Encoded.Length);
byte[] Key = CreateKey(password, Salt);
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
aesAlg.Mode = CipherMode.CBC;
aesAlg.Padding = PaddingMode.PKCS7;
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
using (var msDecrypt = new MemoryStream(Encoded))
{
using (var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (var srDecrypt = new StreamReader(csDecrypt))
{
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
return plaintext;
}
catch (Exception e)
{
return null;
}
}
public static byte[] CreateKey(string password, byte[] salt)
{
using (var rfc2898DeriveBytes = new Rfc2898DeriveBytes(password, salt, iterations))
return rfc2898DeriveBytes.GetBytes(32);
}
private static byte[] GetSalt()
{
var salt = new byte[32];
using (var random = new RNGCryptoServiceProvider())
{
random.GetNonZeroBytes(salt);
}
return salt;
}
对于 Javascript 解决方案，我使用 CryptoJS，基于此参考http://www.adonespitogo.com/articles/encrypting-data-with-cryptojs-aes/ http://www.adonespitogo.com/articles/encrypting-data-with-cryptojs-aes/
var keySize = 256;
var ivSize = 128;
var saltSize = 256;
var iterations = 1000;
var message = "Hello World";
var password = "Secret Password";
function encrypt (msg, pass) {
var salt = CryptoJS.lib.WordArray.random(saltSize/8);
var key = CryptoJS.PBKDF2(pass, salt, {
keySize: keySize/32,
iterations: iterations
});
var iv = CryptoJS.lib.WordArray.random(ivSize/8);
var encrypted = CryptoJS.AES.encrypt(msg, key, {
iv: iv,
padding: CryptoJS.pad.Pkcs7,
mode: CryptoJS.mode.CBC
});
// salt, iv will be hex 32 in length
// append them to the ciphertext for use in decryption
var transitmessage = salt + iv + encrypted;
return transitmessage.toString();
}
function decrypt (transitmessage, pass) {
var salt = CryptoJS.enc.Hex.parse(transitmessage.substr(0, 64));
var iv = CryptoJS.enc.Hex.parse(transitmessage.substr(64, 32));
var encrypted = transitmessage.substring(96);
var key = CryptoJS.PBKDF2(pass, salt, {
keySize: keySize/32,
iterations: iterations
});
var decrypted = CryptoJS.AES.decrypt(encrypted, key, {
iv: iv,
padding: CryptoJS.pad.Pkcs7,
mode: CryptoJS.mode.CBC
})
return decrypted.toString(CryptoJS.enc.Utf8);
}
使用的密码：Secret Password
C# 结果：r7Oi1vMXZ5mYJay8i+slbJZEiT3CxV/1zOYntbZIsS5RuasABJKQQQVvAe50U1deIIqyQiwzQWYelMJ48WWpMQ==
JavaScript 结果：72ff8e7b653efbe3101d2c4ca7d7fe1af06652b907a90281aafa5ae09b45c9af091571b08d3d39cbad129939488319b2pprMQFFEJZR5JlrDsMqT8w==
结果应该是Hello World
两种解决方案在各自的环境中都能很好地工作，但是 C# 或 Javascript 哈希值无法交换，它们也不会解密。我的猜测是字符编码与此有关，因此 Base64 大小差异如此之大。有谁有想法让这个一起工作吗？谢谢！
