加密数据AES

本文关键字：AES 数据 加密 | 更新日期: 2023-09-27 17:54:28

是否有办法用AES加密数据?我希望使用至少128位的加密密钥。

我尝试使用微软提供的AES默认类，但我不能做很多…我不能设置键长。

还有别的类可以使用吗?

加密数据AES

是。您可以使用http://www.codeproject.com/Articles/769741/Csharp-AES-bits-Encryption-Library-with-Salt

中列出的代码

您可以使用RIJNDAEL:

首先需要包含using System.Security.Cryptography; 

public byte[] AES_Encrypt(byte[] bytesToBeEncrypted, byte[] passwordBytes)
    {
        byte[] encryptedBytes = null;
        // Set your salt here, change it to meet your flavor:
        // The salt bytes must be at least 8 bytes.
        byte[] saltBytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
        using (MemoryStream ms = new MemoryStream())
        {
            using (RijndaelManaged AES = new RijndaelManaged())
            {
                AES.KeySize = 256;
                AES.BlockSize = 128;
                var key = new Rfc2898DeriveBytes(passwordBytes, saltBytes, 1000);
                AES.Key = key.GetBytes(AES.KeySize / 8);
                AES.IV = key.GetBytes(AES.BlockSize / 8);
                AES.Mode = CipherMode.CBC;
                using (var cs = new CryptoStream(ms, AES.CreateEncryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(bytesToBeEncrypted, 0, bytesToBeEncrypted.Length);
                    cs.Close();
                }
                encryptedBytes = ms.ToArray();
            }
        }
        return encryptedBytes;
    }
    public byte[] AES_Decrypt(byte[] bytesToBeDecrypted, byte[] passwordBytes)
    {
        byte[] decryptedBytes = null;
        // Set your salt here, change it to meet your flavor:
        // The salt bytes must be at least 8 bytes.
        byte[] saltBytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
        using (MemoryStream ms = new MemoryStream())
        {
            using (RijndaelManaged AES = new RijndaelManaged())
            {
                AES.KeySize = 256;
                AES.BlockSize = 128;
                var key = new Rfc2898DeriveBytes(passwordBytes, saltBytes, 1000);
                AES.Key = key.GetBytes(AES.KeySize / 8);
                AES.IV = key.GetBytes(AES.BlockSize / 8);
                AES.Mode = CipherMode.CBC;
                using (var cs = new CryptoStream(ms, AES.CreateDecryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(bytesToBeDecrypted, 0, bytesToBeDecrypted.Length);
                    cs.Close();
                }
                decryptedBytes = ms.ToArray();
            }
        }
        return decryptedBytes;
    }

public void EncryptFile(string filename, string outfilename, string psw)
        {
            string file = filename;
            string password = psw;
            byte[] bytesToBeEncrypted = File.ReadAllBytes(file); //read bytes to encrypt them 
            byte[] passwordBytes = Encoding.UTF8.GetBytes(password); //read with UTF8 encoding the password.
            passwordBytes = SHA256.Create().ComputeHash(passwordBytes); //hash the psw
            byte[] bytesEncrypted = AES_Encrypt(bytesToBeEncrypted, passwordBytes);
            string fileEncrypted = outfilename;
            File.WriteAllBytes(fileEncrypted, bytesEncrypted);
        }
        public void DecryptFile(string filename, string outfilename, string psw)
        {
            string fileEncrypted = filename;
            string password = psw;
            byte[] bytesToBeDecrypted = File.ReadAllBytes(fileEncrypted);
            byte[] passwordBytes = Encoding.UTF8.GetBytes(password);
            passwordBytes = SHA256.Create().ComputeHash(passwordBytes);
            byte[] bytesDecrypted = AES_Decrypt(bytesToBeDecrypted, passwordBytes);
            string file = outfilename;
            File.WriteAllBytes(file, bytesDecrypted);
        }
相关文章：