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。