C#自定义RSA加密解密及RSA签名和验证类实例

本文实例讲述了C#自定义RSA加密解密及RSA签名和验证类。分享给大家供大家参考。具体分析如下：

这个C#类自定义RSA加密解密及RSA签名和验证，包含了RSA加密、解密及签名所需的相关函数，带有详细的注释说明。

using System;
using System.Text;
using System.Security.Cryptography;
namespace DotNet.Utilities
{
/// <summary>
/// RSA加密解密及RSA签名和验证
/// </summary>
public class RSACryption
{  
 public RSACryption()
 {    
 }

#region RSA 加密解密
 #region RSA 的密钥产生

/// <summary>
 /// RSA 的密钥产生 产生私钥 和公钥
 /// </summary>
 /// <param name="xmlKeys"></param>
 /// <param name="xmlPublicKey"></param>
 public void RSAKey(out string xmlKeys,out string xmlPublicKey)
 {    
   System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
   xmlKeys=rsa.ToXmlString(true);
   xmlPublicKey = rsa.ToXmlString(false);    
 }
 #endregion
 #region RSA的加密函数
 //##############################################################################
 //RSA 方式加密
 //说明KEY必须是XML的行式,返回的是字符串
 //在有一点需要说明！！该加密方式有 长度 限制的！！
 //##############################################################################
 //RSA的加密函数 string
 public string RSAEncrypt(string xmlPublicKey,string m_strEncryptString )
 {

byte[] PlainTextBArray;
  byte[] CypherTextBArray;
  string Result;
  RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
  rsa.FromXmlString(xmlPublicKey);
  PlainTextBArray = (new UnicodeEncoding()).GetBytes(m_strEncryptString);
  CypherTextBArray = rsa.Encrypt(PlainTextBArray, false);
  Result=Convert.ToBase64String(CypherTextBArray);
  return Result;

}
 //RSA的加密函数 byte[]
 public string RSAEncrypt(string xmlPublicKey,byte[] EncryptString )
 {

byte[] CypherTextBArray;
  string Result;
  RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
  rsa.FromXmlString(xmlPublicKey);
  CypherTextBArray = rsa.Encrypt(EncryptString, false);
  Result=Convert.ToBase64String(CypherTextBArray);
  return Result;

}
 #endregion
 #region RSA的解密函数
 //RSA的解密函数 string
 public string RSADecrypt(string xmlPrivateKey, string m_strDecryptString )
 {  
  byte[] PlainTextBArray;
  byte[] DypherTextBArray;
  string Result;
  System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
  rsa.FromXmlString(xmlPrivateKey);
  PlainTextBArray =Convert.FromBase64String(m_strDecryptString);
  DypherTextBArray=rsa.Decrypt(PlainTextBArray, false);
  Result=(new UnicodeEncoding()).GetString(DypherTextBArray);
  return Result;

}
 //RSA的解密函数 byte
 public string RSADecrypt(string xmlPrivateKey, byte[] DecryptString )
 {  
  byte[] DypherTextBArray;
  string Result;
  System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
  rsa.FromXmlString(xmlPrivateKey);
  DypherTextBArray=rsa.Decrypt(DecryptString, false);
  Result=(new UnicodeEncoding()).GetString(DypherTextBArray);
  return Result;

}
 #endregion
 #endregion
 #region RSA数字签名
 #region 获取Hash描述表
 //获取Hash描述表 ，sharejs.com
 public bool GetHash(string m_strSource, ref byte[] HashData)
 {    
  //从字符串中取得Hash描述
  byte[] Buffer;
  System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
  Buffer = System.Text.Encoding.GetEncoding("GB2312").GetBytes(m_strSource);
  HashData = MD5.ComputeHash(Buffer);
  return true;    
 }
 //获取Hash描述表
 public bool GetHash(string m_strSource, ref string strHashData)
 {

//从字符串中取得Hash描述
  byte[] Buffer;
  byte[] HashData;
  System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
  Buffer = System.Text.Encoding.GetEncoding("GB2312").GetBytes(m_strSource);
  HashData = MD5.ComputeHash(Buffer);
  strHashData = Convert.ToBase64String(HashData);
  return true;

}
 //获取Hash描述表
 public bool GetHash(System.IO.FileStream objFile, ref byte[] HashData)
 {

//从文件中取得Hash描述
  System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
  HashData = MD5.ComputeHash(objFile);
  objFile.Close();
  return true;

}
 //获取Hash描述表
 public bool GetHash(System.IO.FileStream objFile, ref string strHashData)
 {

//从文件中取得Hash描述
  byte[] HashData;
  System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
  HashData = MD5.ComputeHash(objFile);
  objFile.Close();
  strHashData = Convert.ToBase64String(HashData);
  return true;

}
 #endregion
 #region RSA签名
 //RSA签名
 public bool SignatureFormatter(string p_strKeyPrivate, byte[] HashbyteSignature, ref byte[] EncryptedSignatureData)
 {

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
   RSA.FromXmlString(p_strKeyPrivate);
   System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
   //设置签名的算法为MD5
   RSAFormatter.SetHashAlgorithm("MD5");
   //执行签名
   EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);
   return true;

}
 //RSA签名
 public bool SignatureFormatter(string p_strKeyPrivate, byte[] HashbyteSignature, ref string m_strEncryptedSignatureData)
 {

byte[] EncryptedSignatureData;
   System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
   RSA.FromXmlString(p_strKeyPrivate);
   System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
   //设置签名的算法为MD5
   RSAFormatter.SetHashAlgorithm("MD5");
   //执行签名
   EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);
   m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData);
   return true;

}
 //RSA签名
 public bool SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature, ref byte[] EncryptedSignatureData)
 {

byte[] HashbyteSignature;
   HashbyteSignature = Convert.FromBase64String(m_strHashbyteSignature);
   System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
   RSA.FromXmlString(p_strKeyPrivate);
   System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
   //设置签名的算法为MD5
   RSAFormatter.SetHashAlgorithm("MD5");
   //执行签名
   EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);
   return true;

}
 //RSA签名
 public bool SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature, ref string m_strEncryptedSignatureData)
 {

byte[] HashbyteSignature;
   byte[] EncryptedSignatureData;
   HashbyteSignature = Convert.FromBase64String(m_strHashbyteSignature);
   System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
   RSA.FromXmlString(p_strKeyPrivate);
   System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
   //设置签名的算法为MD5
   RSAFormatter.SetHashAlgorithm("MD5");
   //执行签名
   EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);
   m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData);
   return true;

}
 #endregion
 #region RSA 签名验证
 public bool SignatureDeformatter(string p_strKeyPublic, byte[] HashbyteDeformatter, byte[] DeformatterData)
 {

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
   RSA.FromXmlString(p_strKeyPublic);
   System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
   //指定解密的时候HASH算法为MD5
   RSADeformatter.SetHashAlgorithm("MD5");
   if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
   {
    return true;
   }
   else
   {
    return false;
   }

}
 public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, byte[] DeformatterData)
 {

byte[] HashbyteDeformatter;
   HashbyteDeformatter = Convert.FromBase64String(p_strHashbyteDeformatter);
   System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
   RSA.FromXmlString(p_strKeyPublic);
   System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
   //指定解密的时候HASH算法为MD5
   RSADeformatter.SetHashAlgorithm("MD5");
   if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
   {
    return true;
   }
   else
   {
    return false;
   }

}
 public bool SignatureDeformatter(string p_strKeyPublic, byte[] HashbyteDeformatter, string p_strDeformatterData)
 {

byte[] DeformatterData;
   System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
   RSA.FromXmlString(p_strKeyPublic);
   System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
   //指定解密的时候HASH算法为MD5
   RSADeformatter.SetHashAlgorithm("MD5");
   DeformatterData =Convert.FromBase64String(p_strDeformatterData);
   if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
   {
    return true;
   }
   else
   {
    return false;
   }

}
 public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, string p_strDeformatterData)
 {

byte[] DeformatterData;
   byte[] HashbyteDeformatter;
   HashbyteDeformatter = Convert.FromBase64String(p_strHashbyteDeformatter);
   System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
   RSA.FromXmlString(p_strKeyPublic);
   System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
   //指定解密的时候HASH算法为MD5
   RSADeformatter.SetHashAlgorithm("MD5");
   DeformatterData =Convert.FromBase64String(p_strDeformatterData);
   if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
   {
    return true;
   }
   else
   {
    return false;
   }

}

#endregion

#endregion
}
}

希望本文所述对大家的C#程序设计有所帮助。