C# RSA加密解密及RSA签名和验证

最新推荐文章于 2024-05-15 13:48:06 发布

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最新推荐文章于 2024-05-15 13:48:06 发布

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原文链接：http://www.cnblogs.com/whz881027/articles/2109535.html

本文深入解析RSA算法的密钥生成、加密、解密、数字签名及验证过程，涵盖从基础概念到实际应用的完整流程。

/// <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
  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();

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();

    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();

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();

    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();

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();

DeformatterData =Convert.FromBase64String(p_strDeformatterData);

    if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
    {
     return true;
    }
    else
    {
     return false;
    }

  }

#endregion

}

转载于:https://www.cnblogs.com/whz881027/articles/2109535.html