我正在尝试使用 C# 加密字符串并使用 Angular crypto-js 库解密它,但它给了我不同的输出。
我尝试了不同的 c# aes 加密实现,但 crypto-js 库无法解密 c# 中的加密数据。感谢您的任何帮助。
这是我的代码
程序.cs
static void Main()
{
var r = EncryptString("exampleString", "examplePassword");
Console.Write(r);
}
public static string EncryptString(string plainText, string passPhrase)
{
if (string.IsNullOrEmpty(plainText))
{
return "";
}
// generate salt
byte[] key, iv;
var salt = new byte[8];
var rng = new RNGCryptoServiceProvider();
rng.GetNonZeroBytes(salt);
DeriveKeyAndIv(passPhrase, salt, out key, out iv);
// encrypt bytes
var encryptedBytes = EncryptStringToBytesAes(plainText, key, iv);
// add salt as first 8 bytes
var encryptedBytesWithSalt = new byte[salt.Length + encryptedBytes.Length + 8];
Buffer.BlockCopy(Encoding.ASCII.GetBytes("Salted__"), 0, encryptedBytesWithSalt, 0, 8);
Buffer.BlockCopy(salt, 0, encryptedBytesWithSalt, 8, salt.Length);
Buffer.BlockCopy(encryptedBytes, 0, encryptedBytesWithSalt, salt.Length + 8, encryptedBytes.Length);
// base64 encode
return Convert.ToBase64String(encryptedBytesWithSalt);
}
private static void DeriveKeyAndIv(string passPhrase, byte[] salt, out byte[] key, out byte[] iv)
{
// generate key and iv
var concatenatedHashes = new List<byte>(48);
var password = Encoding.UTF8.GetBytes(passPhrase);
var currentHash = new byte[0];
var md5 = MD5.Create();
bool enoughBytesForKey = false;
// See http://www.openssl.org/docs/crypto/EVP_BytesToKey.html#KEY_DERIVATION_ALGORITHM
while (!enoughBytesForKey)
{
var preHashLength = currentHash.Length + password.Length + salt.Length;
var preHash = new byte[preHashLength];
Buffer.BlockCopy(currentHash, 0, preHash, 0, currentHash.Length);
Buffer.BlockCopy(password, 0, preHash, currentHash.Length, password.Length);
Buffer.BlockCopy(salt, 0, preHash, currentHash.Length + password.Length, salt.Length);
currentHash = md5.ComputeHash(preHash);
concatenatedHashes.AddRange(currentHash);
if (concatenatedHashes.Count >= 48)
enoughBytesForKey = true;
}
key = new byte[32];
iv = new byte[16];
concatenatedHashes.CopyTo(0, key, 0, 32);
concatenatedHashes.CopyTo(32, iv, 0, 16);
md5.Clear();
}
static byte[] EncryptStringToBytesAes(string plainText, byte[] key, byte[] iv)
{
// Check arguments.
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (key == null || key.Length <= 0)
throw new ArgumentNullException("key");
if (iv == null || iv.Length <= 0)
throw new ArgumentNullException("iv");
// Declare the stream used to encrypt to an in memory
// array of bytes.
MemoryStream msEncrypt;
// Declare the RijndaelManaged object
// used to encrypt the data.
RijndaelManaged aesAlg = null;
try
{
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new RijndaelManaged { Mode = CipherMode.CBC, KeySize = 256, BlockSize = 128, Key = key, IV = iv };
// Create an encryptor to perform the stream transform.
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
msEncrypt = new MemoryStream();
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (var swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
swEncrypt.Flush();
swEncrypt.Close();
}
}
}
finally
{
// Clear the RijndaelManaged object.
aesAlg?.Clear();
}
// Return the encrypted bytes from the memory stream.
return msEncrypt.ToArray();
}
简单地使用 crypto-js 解密它
let CryptoJS = require('crypto-js');
let r = CryptoJS.AES.decrypt('exampleString', 'examplePassword').toString();