.NET使用RSA加密解密的方法

using System;using System.IO;using System.Text;using System.Globalization;using System.Collections.Generic;using System.Security.Cryptography;namespace Utils{  /// <summary>  /// 密码加密解密操作相关类  /// </summary>  public static class PassWordHelper  {    #region MD5 加密    /// <summary>    /// MD5加密    /// </summary>    public static string Md532(this string source)    {      if (string.IsNullOrEmpty(source)) return null;      var encoding = Encoding.UTF8;      MD5 md5 = MD5.Create();      return HashAlgorithmBase(md5, source, encoding);    }    /// <summary>    /// 加盐MD5加密    /// </summary>    public static string Md532Salt(this string source, string salt)    {      return string.IsNullOrEmpty(source) ? source.Md532() : (source + "『" + salt + "』").Md532();    }    #endregion    #region SHA 加密    /// <summary>    /// SHA1 加密    /// </summary>    public static string Sha1(this string source)    {      if (string.IsNullOrEmpty(source)) return null;      var encoding = Encoding.UTF8;      SHA1 sha1 = new SHA1CryptoServiceProvider();      return HashAlgorithmBase(sha1, source, encoding);    }    /// <summary>    /// SHA256 加密    /// </summary>    public static string Sha256(this string source)    {      if (string.IsNullOrEmpty(source)) return null;      var encoding = Encoding.UTF8;      SHA256 sha256 = new SHA256Managed();      return HashAlgorithmBase(sha256, source, encoding);    }    /// <summary>    /// SHA512 加密    /// </summary>    public static string Sha512(this string source)    {      if (string.IsNullOrEmpty(source)) return null;      var encoding = Encoding.UTF8;      SHA512 sha512 = new SHA512Managed();      return HashAlgorithmBase(sha512, source, encoding);    }    #endregion    #region HMAC 加密    /// <summary>    /// HmacSha1 加密    /// </summary>    public static string HmacSha1(this string source, string keyVal)    {      if (string.IsNullOrEmpty(source)) return null;      var encoding = Encoding.UTF8;      byte[] keyStr = encoding.GetBytes(keyVal);      HMACSHA1 hmacSha1 = new HMACSHA1(keyStr);      return HashAlgorithmBase(hmacSha1, source, encoding);    }    /// <summary>    /// HmacSha256 加密    /// </summary>    public static string HmacSha256(this string source, string keyVal)    {      if (string.IsNullOrEmpty(source)) return null;      var encoding = Encoding.UTF8;      byte[] keyStr = encoding.GetBytes(keyVal);      HMACSHA256 hmacSha256 = new HMACSHA256(keyStr);      return HashAlgorithmBase(hmacSha256, source, encoding);    }    /// <summary>    /// HmacSha384 加密    /// </summary>    public static string HmacSha384(this string source, string keyVal)    {      if (string.IsNullOrEmpty(source)) return null;      var encoding = Encoding.UTF8;      byte[] keyStr = encoding.GetBytes(keyVal);      HMACSHA384 hmacSha384 = new HMACSHA384(keyStr);      return HashAlgorithmBase(hmacSha384, source, encoding);    }    /// <summary>    /// HmacSha512 加密    /// </summary>    public static string HmacSha512(this string source, string keyVal)    {      if (string.IsNullOrEmpty(source)) return null;      var encoding = Encoding.UTF8;      byte[] keyStr = encoding.GetBytes(keyVal);      HMACSHA512 hmacSha512 = new HMACSHA512(keyStr);      return HashAlgorithmBase(hmacSha512, source, encoding);    }    /// <summary>    /// HmacMd5 加密    /// </summary>    public static string HmacMd5(this string source, string keyVal)    {      if (string.IsNullOrEmpty(source)) return null;      var encoding = Encoding.UTF8;      byte[] keyStr = encoding.GetBytes(keyVal);      HMACMD5 hmacMd5 = new HMACMD5(keyStr);      return HashAlgorithmBase(hmacMd5, source, encoding);    }    /// <summary>    /// HmacRipeMd160 加密    /// </summary>    public static string HmacRipeMd160(this string source, string keyVal)    {      if (string.IsNullOrEmpty(source)) return null;      var encoding = Encoding.UTF8;      byte[] keyStr = encoding.GetBytes(keyVal);      HMACRIPEMD160 hmacRipeMd160 = new HMACRIPEMD160(keyStr);      return HashAlgorithmBase(hmacRipeMd160, source, encoding);    }    #endregion    #region AES 加密解密    /// <summary>     /// AES加密     /// </summary>     /// <param name="source">待加密字段</param>     /// <param name="keyVal">密钥值</param>     /// <param name="ivVal">加密辅助向量</param>     /// <returns></returns>     public static string AesStr(this string source, string keyVal, string ivVal)    {      var encoding = Encoding.UTF8;      byte[] btKey = keyVal.FormatByte(encoding);      byte[] btIv = ivVal.FormatByte(encoding);      byte[] byteArray = encoding.GetBytes(source);      string encrypt;      Rijndael aes = Rijndael.Create();      using (MemoryStream mStream = new MemoryStream())      {        using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateEncryptor(btKey, btIv), CryptoStreamMode.Write))        {          cStream.Write(byteArray, 0, byteArray.Length);          cStream.FlushFinalBlock();          encrypt = Convert.ToBase64String(mStream.ToArray());        }      }      aes.Clear();      return encrypt;    }    /// <summary>     /// AES解密     /// </summary>     /// <param name="source">待加密字段</param>     /// <param name="keyVal">密钥值</param>     /// <param name="ivVal">加密辅助向量</param>     /// <returns></returns>     public static string UnAesStr(this string source, string keyVal, string ivVal)    {      var encoding = Encoding.UTF8;      byte[] btKey = keyVal.FormatByte(encoding);      byte[] btIv = ivVal.FormatByte(encoding);      byte[] byteArray = Convert.FromBase64String(source);      string decrypt;      Rijndael aes = Rijndael.Create();      using (MemoryStream mStream = new MemoryStream())      {        using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateDecryptor(btKey, btIv), CryptoStreamMode.Write))        {          cStream.Write(byteArray, 0, byteArray.Length);          cStream.FlushFinalBlock();          decrypt = encoding.GetString(mStream.ToArray());        }      }      aes.Clear();      return decrypt;    }    /// <summary>     /// AES Byte类型 加密     /// </summary>     /// <param name="data">待加密明文</param>     /// <param name="keyVal">密钥值</param>     /// <param name="ivVal">加密辅助向量</param>     /// <returns></returns>     public static byte[] AesByte(this byte[] data, string keyVal, string ivVal)    {      byte[] bKey = new byte[32];      Array.Copy(Encoding.UTF8.GetBytes(keyVal.PadRight(bKey.Length)), bKey, bKey.Length);      byte[] bVector = new byte[16];      Array.Copy(Encoding.UTF8.GetBytes(ivVal.PadRight(bVector.Length)), bVector, bVector.Length);      byte[] cryptograph;      Rijndael aes = Rijndael.Create();      try      {        using (MemoryStream mStream = new MemoryStream())        {          using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateEncryptor(bKey, bVector), CryptoStreamMode.Write))          {            cStream.Write(data, 0, data.Length);            cStream.FlushFinalBlock();            cryptograph = mStream.ToArray();          }        }      }      catch      {        cryptograph = null;      }      return cryptograph;    }    /// <summary>     /// AES Byte类型 解密     /// </summary>     /// <param name="data">待解密明文</param>     /// <param name="keyVal">密钥值</param>     /// <param name="ivVal">加密辅助向量</param>     /// <returns></returns>     public static byte[] UnAesByte(this byte[] data, string keyVal, string ivVal)    {      byte[] bKey = new byte[32];      Array.Copy(Encoding.UTF8.GetBytes(keyVal.PadRight(bKey.Length)), bKey, bKey.Length);      byte[] bVector = new byte[16];      Array.Copy(Encoding.UTF8.GetBytes(ivVal.PadRight(bVector.Length)), bVector, bVector.Length);      byte[] original;      Rijndael aes = Rijndael.Create();      try      {        using (MemoryStream mStream = new MemoryStream(data))        {          using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateDecryptor(bKey, bVector), CryptoStreamMode.Read))          {            using (MemoryStream originalMemory = new MemoryStream())            {              byte[] buffer = new byte[1024];              int readBytes;              while ((readBytes = cStream.Read(buffer, 0, buffer.Length)) > 0)              {                originalMemory.Write(buffer, 0, readBytes);              }              original = originalMemory.ToArray();            }          }        }      }      catch      {        original = null;      }      return original;    }    #endregion    #region RSA 加密解密    //密钥对，请配合密钥生成工具使用『 http://download.csdn.net/detail/downiis6/9464639 』    private const string PublicRsaKey = @"<RSAKeyValue> <Modulus>8Yvf/LjXRhCuOREk2CuSYvbD/RadwJ4sjHREIpQVKwkTlG3BtRgpnaMcoeLAesmwvpBWnqK4hBkYLxhRj+NEKnlGrJ+LkNMnZr0/4CMuulZFAnx7iQYaSq7Eh7kBKGLofc05CjZguYpnPNxHIv4VNx+a9tIh+hnhjrmkJLUm3l0=</Modulus> <Exponent>AQAB</Exponent></RSAKeyValue>";    private const string PrivateRsaKey = @"<RSAKeyValue> <Modulus>8Yvf/LjXRhCuOREk2CuSYvbD/RadwJ4sjHREIpQVKwkTlG3BtRgpnaMcoeLAesmwvpBWnqK4hBkYLxhRj+NEKnlGrJ+LkNMnZr0/4CMuulZFAnx7iQYaSq7Eh7kBKGLofc05CjZguYpnPNxHIv4VNx+a9tIh+hnhjrmkJLUm3l0=</Modulus> <Exponent>AQAB</Exponent> <P>/xAaa/4dtDxcEAk5koSZBPjuxqvKJikpwLA1nCm3xxAUMDVxSwQyr+SHFaCnBN9kqaNkQCY6kDCfJXFWPOj0Bw==</P> <Q>8m8PFVA4sO0oEKMVQxt+ivDTHFuk/W154UL3IgC9Y6bzlvYewXZSzZHmxZXXM1lFtwoYG/k+focXBITsiJepew==</Q> <DP>ONVSvdt6rO2CKgSUMoSfQA9jzRr8STKE3i2lVG2rSIzZosBVxTxjOvQ18WjBroFEgdQpg23BQN3EqGgvqhTSQw==</DP> <DQ>gfp7SsEM9AbioTDemHEoQlPly+FyrxE/9D8UAt4ErGX5WamxSaYntOGRqcOxcm1djEpULMNP90R0Wc7uhjlR+w==</DQ> <InverseQ>C0eBsp2iMOxWwKo+EzkHOP0H+YOitUVgjekGXmSt9a3TvikQNaJ5ATlqKsZaMGsnB6UIHei+kUaCusVX0HgQ2A==</InverseQ> <D>tPYxEfo9Nb3LeO+SJe3G1yO+w37NIwCdqYB1h15f2YUMSThNVmpKy1HnYpUp1RQDuVETw/duu3C9gJL8kAsZBjBrVZ0zC/JZsgvSNprfUK3Asc4FgFsGfQGKW1nvvgdMbvqr4ClB0R8czkki+f9Oc5ea/RMqXxlI+XjzMYDEknU=</D></RSAKeyValue>";    /// <summary>    /// RSA 加密    /// </summary>    public static string Rsa(this string source)    {      RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();      rsa.FromXmlString(PublicRsaKey);      var cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(source), true);      return Convert.ToBase64String(cipherbytes);    }    /// <summary>    /// RSA解密    /// </summary>    public static string UnRsa(this string source)    {      RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();      rsa.FromXmlString(PrivateRsaKey);      var cipherbytes = rsa.Decrypt(Convert.FromBase64String(source), true);      return Encoding.UTF8.GetString(cipherbytes);    }    #endregion    #region DES 加密解密    /// <summary>    /// DES 加密    /// </summary>    public static string Des(this string source, string keyVal, string ivVal)    {      try      {        byte[] data = Encoding.UTF8.GetBytes(source);        var des = new DESCryptoServiceProvider { Key = Encoding.ASCII.GetBytes(keyVal.Length > 8 ? keyVal.Substring(0, 8) : keyVal), IV = Encoding.ASCII.GetBytes(ivVal.Length > 8 ? ivVal.Substring(0, 8) : ivVal) };        var desencrypt = des.CreateEncryptor();        byte[] result = desencrypt.TransformFinalBlock(data, 0, data.Length);        return BitConverter.ToString(result);      }      catch { return "转换出错！"; }    }    /// <summary>    /// DES 解密    /// </summary>    public static string UnDes(this string source, string keyVal, string ivVal)    {      try      {        string[] sInput = source.Split("-".ToCharArray());        byte[] data = new byte[sInput.Length];        for (int i = 0; i < sInput.Length; i++)        {          data[i] = byte.Parse(sInput[i], NumberStyles.HexNumber);        }        var des = new DESCryptoServiceProvider { Key = Encoding.ASCII.GetBytes(keyVal.Length > 8 ? keyVal.Substring(0, 8) : keyVal), IV = Encoding.ASCII.GetBytes(ivVal.Length > 8 ? ivVal.Substring(0, 8) : ivVal) };        var desencrypt = des.CreateDecryptor();        byte[] result = desencrypt.TransformFinalBlock(data, 0, data.Length);        return Encoding.UTF8.GetString(result);      }      catch { return "解密出错！"; }    }    #endregion    #region TripleDES 加密解密    /// <summary>    /// DES3 加密    /// </summary>    public static string Des3(this string source, string keyVal)    {      try      {        TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider        {          Key = keyVal.FormatByte(Encoding.UTF8),          Mode = CipherMode.ECB,          Padding = PaddingMode.PKCS7        };        using (MemoryStream ms = new MemoryStream())        {          byte[] btArray = Encoding.UTF8.GetBytes(source);          try          {            using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))            {              cs.Write(btArray, 0, btArray.Length);              cs.FlushFinalBlock();            }            return ms.ToArray().Bytes2Str();          }          catch { return source; }        }      }      catch      {        return "TripleDES加密出现错误";      }    }    /// <summary>    /// DES3 解密    /// </summary>    public static string UnDes3(this string source, string keyVal)    {      try      {        byte[] byArray = source.Str2Bytes();        TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider        {          Key = keyVal.FormatByte(Encoding.UTF8),          Mode = CipherMode.ECB,          Padding = PaddingMode.PKCS7        };        using (MemoryStream ms = new MemoryStream())        {          using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))          {            cs.Write(byArray, 0, byArray.Length);            cs.FlushFinalBlock();            cs.Close();            ms.Close();            return Encoding.UTF8.GetString(ms.ToArray());          }        }      }      catch      {        return "TripleDES解密出现错误";      }    }    #endregion    #region BASE64 加密解密    /// <summary>    /// BASE64 加密    /// </summary>    /// <param name="source">待加密字段</param>    /// <returns></returns>    public static string Base64(this string source)    {      var btArray = Encoding.UTF8.GetBytes(source);      return Convert.ToBase64String(btArray, 0, btArray.Length);    }    /// <summary>    /// BASE64 解密    /// </summary>    /// <param name="source">待解密字段</param>    /// <returns></returns>    public static string UnBase64(this string source)    {      var btArray = Convert.FromBase64String(source);      return Encoding.UTF8.GetString(btArray);    }    #endregion    #region 内部方法    /// <summary>    /// 转成数组    /// </summary>    private static byte[] Str2Bytes(this string source)    {      source = source.Replace(" ", "");      byte[] buffer = new byte[source.Length / 2];      for (int i = 0; i < source.Length; i += 2) buffer[i / 2] = Convert.ToByte(source.Substring(i, 2), 16);      return buffer;    }    /// <summary>    /// 转换成字符串    /// </summary>    private static string Bytes2Str(this IEnumerable<byte> source, string formatStr = "{0:X2}")    {      StringBuilder pwd = new StringBuilder();      foreach (byte btStr in source) { pwd.AppendFormat(formatStr, btStr); }      return pwd.ToString();    }    private static byte[] FormatByte(this string strVal, Encoding encoding)    {      return encoding.GetBytes(strVal.Base64().Substring(0, 16).ToUpper());    }    /// <summary>    /// HashAlgorithm 加密统一方法    /// </summary>    private static string HashAlgorithmBase(HashAlgorithm hashAlgorithmObj, string source, Encoding encoding)    {      byte[] btStr = encoding.GetBytes(source);      byte[] hashStr = hashAlgorithmObj.ComputeHash(btStr);      return hashStr.Bytes2Str();    }    #endregion  }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace Test{  class Program  {    static void Main(string[] args)    {      string plainText = "这是一条被和谐的消息！";      //加密明文，获得密文      string EncryptText= Utils.PassWordHelper.Rsa(plainText);      Console.WriteLine(EncryptText);      //解密密文，获得明文      string DecryptText = Utils.PassWordHelper.UnRsa(EncryptText);      Console.WriteLine(DecryptText);      Console.ReadKey();    }  }}