using System; 
using System.Text; 
using System.Security.Cryptography;
namespace DotNet.Utilities
{ 
 /// <summary> 
 /// RSA加密解密及RSA簽名和驗(yàn)證
 /// </summary> 
 public class RSACryption 
 {   
  public RSACryption() 
  {    
  } 
  
  #region RSA 加密解密 
  #region RSA 的密鑰產(chǎn)生 
 
  /// <summary>
  /// RSA 的密鑰產(chǎn)生 產(chǎn)生私鑰 和公鑰 
  /// </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的加密函數(shù) 
  //############################################################################## 
  //RSA 方式加密 
  //說(shuō)明KEY必須是XML的行式,返回的是字符串 
  //在有一點(diǎn)需要說(shuō)明??！該加密方式有 長(zhǎng)度 限制的?。?
  //############################################################################## 
  //RSA的加密函數(shù) 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的加密函數(shù) 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的解密函數(shù) 
  //RSA的解密函數(shù) 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的解密函數(shù) 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數(shù)字簽名 
  #region 獲取Hash描述表 
  //獲取Hash描述表 ，sharejs.com
  public bool GetHash(string m_strSource, ref byte[] HashData) 
  {    
   //從字符串中取得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;    
  } 
  //獲取Hash描述表 
  public bool GetHash(string m_strSource, ref string strHashData) 
  { 
   
   //從字符串中取得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; 
   
  } 
  //獲取Hash描述表 
  public bool GetHash(System.IO.FileStream objFile, ref byte[] HashData) 
  { 
   
   //從文件中取得Hash描述 
   System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5"); 
   HashData = MD5.ComputeHash(objFile); 
   objFile.Close(); 
   return true; 
   
  } 
  //獲取Hash描述表 
  public bool GetHash(System.IO.FileStream objFile, ref string strHashData) 
  { 
   
   //從文件中取得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簽名 
  //RSA簽名 
  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); 
    //設(shè)置簽名的算法為MD5 
    RSAFormatter.SetHashAlgorithm("MD5"); 
    //執(zhí)行簽名 
    EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); 
    return true; 
   
  } 
  //RSA簽名 
  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); 
    //設(shè)置簽名的算法為MD5 
    RSAFormatter.SetHashAlgorithm("MD5"); 
    //執(zhí)行簽名 
    EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); 
    m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData); 
    return true; 
   
  } 
  //RSA簽名 
  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); 
    //設(shè)置簽名的算法為MD5 
    RSAFormatter.SetHashAlgorithm("MD5"); 
    //執(zhí)行簽名 
    EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); 
    return true; 
   
  } 
  //RSA簽名 
  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); 
    //設(shè)置簽名的算法為MD5 
    RSAFormatter.SetHashAlgorithm("MD5"); 
    //執(zhí)行簽名 
    EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); 
    m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData); 
    return true; 
   
  } 
  #endregion 
  #region RSA 簽名驗(yàn)證 
  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); 
    //指定解密的時(shí)候HASH算法為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); 
    //指定解密的時(shí)候HASH算法為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); 
    //指定解密的時(shí)候HASH算法為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); 
    //指定解密的時(shí)候HASH算法為MD5 
    RSADeformatter.SetHashAlgorithm("MD5"); 
    DeformatterData =Convert.FromBase64String(p_strDeformatterData); 
    if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData)) 
    { 
     return true; 
    } 
    else 
    { 
     return false; 
    } 
   
  } 

  #endregion 

  #endregion 
 } 
}