C#文件加密方法汇总

  • Z时代
  • 2024-01-10
  • 分类：综合

本文实例汇总了C#文件加密方法。分享给大家供大家参考。具体实现方法如下：

1、AES加密类

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

namespace Utils

{

    /// <summary>

    /// AES加密解密

    /// </summary>

    public class AES

    {

        #region 加密

        #region 加密字符串

        /// <summary>

        /// AES 加密(高级加密标准，是下一代的加密算法标准，速度快，安全级别高，目前 AES 标准的一个实现是 Rijndael 算法)

        /// </summary>

        /// <param name="EncryptString">待加密密文</param>

        /// <param name="EncryptKey">加密密钥</param>

        public static string AESEncrypt(string EncryptString, string EncryptKey)

        {

            return Convert.ToBase64String(AESEncrypt(Encoding.Default.GetBytes(EncryptString), EncryptKey));

        }

        #endregion

        #region 加密字节数组

        /// <summary>

        /// AES 加密(高级加密标准，是下一代的加密算法标准，速度快，安全级别高，目前 AES 标准的一个实现是 Rijndael 算法)

        /// </summary>

        /// <param name="EncryptString">待加密密文</param>

        /// <param name="EncryptKey">加密密钥</param>

        public static byte[] AESEncrypt(byte[] EncryptByte, string EncryptKey)

        {

            if (EncryptByte.Length == 0) { throw (new Exception("明文不得为空")); }

            if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密钥不得为空")); }

            byte[] m_strEncrypt;

            byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ==");

            byte[] m_salt = Convert.FromBase64String("gsf4jvkyhye5/d7k8OrLgM==");

            Rijndael m_AESProvider = Rijndael.Create();

            try

            {

                MemoryStream m_stream = new MemoryStream();

                PasswordDeriveBytes pdb = new PasswordDeriveBytes(EncryptKey, m_salt);

                ICryptoTransform transform = m_AESProvider.CreateEncryptor(pdb.GetBytes(32), m_btIV);

                CryptoStream m_csstream = new CryptoStream(m_stream, transform, CryptoStreamMode.Write);

                m_csstream.Write(EncryptByte, 0, EncryptByte.Length);

                m_csstream.FlushFinalBlock();

                m_strEncrypt = m_stream.ToArray();

                m_stream.Close(); m_stream.Dispose();

                m_csstream.Close(); m_csstream.Dispose();

            }

            catch (IOException ex) { throw ex; }

            catch (CryptographicException ex) { throw ex; }

            catch (ArgumentException ex) { throw ex; }

            catch (Exception ex) { throw ex; }

            finally { m_AESProvider.Clear(); }

            return m_strEncrypt;

        }

        #endregion

        #endregion

        #region 解密

        #region 解密字符串

        /// <summary>

        /// AES 解密(高级加密标准，是下一代的加密算法标准，速度快，安全级别高，目前 AES 标准的一个实现是 Rijndael 算法)

        /// </summary>

        /// <param name="DecryptString">待解密密文</param>

        /// <param name="DecryptKey">解密密钥</param>

        public static string AESDecrypt(string DecryptString, string DecryptKey)

        {

            return Convert.ToBase64String(AESDecrypt(Encoding.Default.GetBytes(DecryptString), DecryptKey));

        }

        #endregion

        #region 解密字节数组

        /// <summary>

        /// AES 解密(高级加密标准，是下一代的加密算法标准，速度快，安全级别高，目前 AES 标准的一个实现是 Rijndael 算法)

        /// </summary>

        /// <param name="DecryptString">待解密密文</param>

        /// <param name="DecryptKey">解密密钥</param>

        public static byte[] AESDecrypt(byte[] DecryptByte, string DecryptKey)

        {

            if (DecryptByte.Length == 0) { throw (new Exception("密文不得为空")); }

            if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密钥不得为空")); }

            byte[] m_strDecrypt;

            byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ==");

            byte[] m_salt = Convert.FromBase64String("gsf4jvkyhye5/d7k8OrLgM==");

            Rijndael m_AESProvider = Rijndael.Create();

            try

            {

                MemoryStream m_stream = new MemoryStream();

                PasswordDeriveBytes pdb = new PasswordDeriveBytes(DecryptKey, m_salt);

                ICryptoTransform transform = m_AESProvider.CreateDecryptor(pdb.GetBytes(32), m_btIV);

                CryptoStream m_csstream = new CryptoStream(m_stream, transform, CryptoStreamMode.Write);

                m_csstream.Write(DecryptByte, 0, DecryptByte.Length);

                m_csstream.FlushFinalBlock();

                m_strDecrypt = m_stream.ToArray();

                m_stream.Close(); m_stream.Dispose();

                m_csstream.Close(); m_csstream.Dispose();

            }

            catch (IOException ex) { throw ex; }

            catch (CryptographicException ex) { throw ex; }

            catch (ArgumentException ex) { throw ex; }

            catch (Exception ex) { throw ex; }

            finally { m_AESProvider.Clear(); }

            return m_strDecrypt;

        }

        #endregion

        #endregion

    }

}

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