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RSA加密算法是一种非对称加密算法。在公钥加密标准和电子商业中RSA被广泛使用。RSA是1977年由罗纳德•李维斯特(Ron Rivest)、阿迪•萨莫尔(Adi Shamir)和伦纳德•阿德曼(Leonard Adleman)一起提出的。当时他们三人都在麻省理工学院工作。RSA就是他们三人姓氏开头字母拼在一起组成的。.Net的推出,我们能够利用.Net Framework中的类提供的加密服务来保证数据安全。目前应用较为广泛的加密方法是使用RSA算法进行加密。在.Net Framework中与RSA加密算法相关的类主要有两个:RSA 类和RSACryptoServiceProvider 类。按照MSDN的说法RSA 类是“表示 RSA 算法的所有实现均从中继承的基类”,而RSACryptoServiceProvider 类是“使用加密服务提供程序 (CSP) 提供的 RSA 算法的实现执行不对称加密和解密”。另外,“表示 RSA 算法的标准参数”的RSAParameters 结构也是很重要的,它保存了RSA算法的参数。 using System.Security.Cryptography; using System.Management; using Microsoft.Win32;
/// <summary> /// 生成公私钥 /// </summary> /// <param name="PrivateKeyPath"></param> /// <param name="PublicKeyPath"></param> public void RSAKey(string PrivateKeyPath, string PublicKeyPath) { try { RSACryptoServiceProvider provider = new RSACryptoServiceProvider(); this.CreatePrivateKeyXML(PrivateKeyPath, provider.ToXmlString(true)); this.CreatePublicKeyXML(PublicKeyPath, provider.ToXmlString(false)); } catch (Exception exception) { throw exception; } } /// <summary> /// 对原始数据进行MD5加密 /// </summary> /// <param name="m_strSource">待加密数据</param> /// <returns>返回机密后的数据</returns> public string GetHash(string m_strSource) { HashAlgorithm algorithm = HashAlgorithm.Create("MD5"); byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(m_strSource); byte[] inArray = algorithm.ComputeHash(bytes); return Convert.ToBase64String(inArray); } /// <summary> /// RSA加密 /// </summary> /// <param name="xmlPublicKey">公钥</param> /// <param name="m_strEncryptString">MD5加密后的数据</param> /// <returns>RSA公钥加密后的数据</returns> public string RSAEncrypt(string xmlPublicKey, string m_strEncryptString) { string str2; try { RSACryptoServiceProvider provider = new RSACryptoServiceProvider(); provider.FromXmlString(xmlPublicKey); byte[] bytes = new UnicodeEncoding().GetBytes(m_strEncryptString); str2 = Convert.ToBase64String(provider.Encrypt(bytes, false)); } catch (Exception exception) { throw exception; } return str2; } /// <summary> /// RSA解密 /// </summary> /// <param name="xmlPrivateKey">私钥</param> /// <param name="m_strDecryptString">待解密的数据</param> /// <returns>解密后的结果</returns> public string RSADecrypt(string xmlPrivateKey, string m_strDecryptString) { string str2; try { RSACryptoServiceProvider provider = new RSACryptoServiceProvider(); provider.FromXmlString(xmlPrivateKey); byte[] rgb = Convert.FromBase64String(m_strDecryptString); byte[] buffer2 = provider.Decrypt(rgb, false); str2 = new UnicodeEncoding().GetString(buffer2); } catch (Exception exception) { throw exception; } return str2; } /// <summary> /// 对MD5加密后的密文进行签名 /// </summary> /// <param name="p_strKeyPrivate">私钥</param> /// <param name="m_strHashbyteSignature">MD5加密后的密文</param> /// <returns></returns> public string SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature) { byte[] rgbHash = Convert.FromBase64String(m_strHashbyteSignature); RSACryptoServiceProvider key = new RSACryptoServiceProvider(); key.FromXmlString(p_strKeyPrivate); RSAPKCS1SignatureFormatter formatter = new RSAPKCS1SignatureFormatter(key); formatter.SetHashAlgorithm("MD5"); byte[] inArray = formatter.CreateSignature(rgbHash); return Convert.ToBase64String(inArray); } /// <summary> /// 签名验证 /// </summary> /// <param name="p_strKeyPublic">公钥</param> /// <param name="p_strHashbyteDeformatter">待验证的用户名</param> /// <param name="p_strDeformatterData">注册码</param> /// <returns></returns> public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, string p_strDeformatterData) { try { byte[] rgbHash = Convert.FromBase64String(p_strHashbyteDeformatter); RSACryptoServiceProvider key = new RSACryptoServiceProvider(); key.FromXmlString(p_strKeyPublic); RSAPKCS1SignatureDeformatter deformatter = new RSAPKCS1SignatureDeformatter(key); deformatter.SetHashAlgorithm("MD5"); byte[] rgbSignature = Convert.FromBase64String(p_strDeformatterData); if (deformatter.VerifySignature(rgbHash, rgbSignature)) { return true; } return false; } catch { return false; } } /// <summary> /// 获取硬盘ID /// </summary> /// <returns>硬盘ID</returns> public string GetHardID() { string HDInfo = ""; ManagementClass cimobject1 = new ManagementClass("Win32_DiskDrive"); ManagementObjectCollection moc1 = cimobject1.GetInstances(); foreach (ManagementObject mo in moc1) { HDInfo = (string)mo.Properties["Model"].Value; } return HDInfo; } /// <summary> /// 读注册表中指定键的值 /// </summary> /// <param name="key">键名</param> /// <returns>返回键值</returns> private string ReadReg(string key) { string temp = ""; try { RegistryKey myKey = Registry.LocalMachine; RegistryKey subKey = myKey.OpenSubKey(@"SOFTWARE\JX\Register");
temp = subKey.GetValue(key).ToString(); subKey.Close(); myKey.Close(); return temp; } catch (Exception) { throw;//可能没有此注册项; }
} /// <summary> /// 创建注册表中指定的键和值 /// </summary> /// <param name="key">键名</param> /// <param name="value">键值</param> private void WriteReg(string key, string value) { try { < |
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