RSA不对称加密，公钥加密私钥解密，私钥加密公钥解密

RSA算法是第一个能同时用于加密和数字签名的算法，也易于理解和操作。 RSA是被研究得最广泛的公钥算法，从提出到现在已近二十年，经历了各种攻击的考验，逐渐为人们接受，普遍认为是目前最优秀的公钥方案之一。RSA的安全性依赖于大数的因子分解，但并没有从理论上证明破译RSA的难度与大数分解难度等价。

.NET提供常用的加密算法类，支持RSA的类是RSACryptoServiceProvider（命名空间：System.Security.Cryptography），但只支持公钥加密，私钥解密。RSACryptoServiceProvider类包括：Modulus、Exponent、P、Q、DP、DQ、InverseQ、D等8个属性，其中Modulus和Exponent就是公钥，Modulus和D就是私钥，RSACryptoServiceProvider类提供导出公钥的方法，也提供导出私钥的方法，但导出的私钥包含上面8个属性

，显然要用RSACryptoServiceProvider实现私钥加密公钥是不可行的。

从RSA的原理来看，公钥加密私钥解密和私钥加密公钥解密应该是等价的，在某些情况下，比如共享软件加密，我们需要用私钥加密注册码或注册文件，发给用户，用户用公钥解密注册码或注册文件进行合法性验证。

不对称密钥

.NET Framework 为不对称加密提供了 RSACryptoServiceProvider 和 DSACryptoServiceProvider 类。这些类在您使用默认构造函数创建新实例时创建一个公钥/私钥对。既可以存储不对称密钥以用在多个会话中，也可以只为一个会话生成不对称密钥。公钥可以被广泛地使用，私钥应被严密地保护起来。

每当创建不对称算法类的新实例时，都生成一个公钥/私钥对。创建该类的新实例后，可以用以下两种方法之一提取密钥信息：

ToXMLString 方法，它返回密钥信息的 XML 表示形式。导出密钥--xml形式的字符串

对应的方法：FromXmlString通过 XML 字符串中的密钥信息初始化RSA 对象。 导入密钥

ExportParameters 方法，它返回RSAParameters 结构以保存密钥信息。导出密钥--参数形式

ImportParameters导入指定的RSAParameters。 （重写RSA.ImportParameters(RSAParameters)。）导入密钥

两个方法都接受布尔值，该值指示是只返回公钥信息还是同时返回公钥和私钥信息。通过使用 ImportParameters方法，可以将 RSACryptoServiceProvider 类初始化为 RSAParameters 结构的值。

下面的代码示例创建 RSACryptoServiceProvider 类的一个新实例，创建一个公钥/私钥对，并将公钥信息保存在RSAParameters 结构中

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//Generate a public/private key pair.

RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

//Save the public key information to an RSAParameters structure.

RSAParameters RSAKeyInfo = RSA.ExportParameters(false);

一、公钥加密私钥解密

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/// <summary>

/// 公钥加密，私钥解密

/// </summary>

public class RSAEncryptHelper

{

/// <summary>

/// 将字符串使用base64算法加密

/// </summary>

/// <param name="code_type">编码类型</param>

/// <param name="code">待加密的字符串</param>

/// <returns>加密后的字符串</returns>

public string EncodeBase64(string code_type, string code)

{

string encode = "";

byte[] bytes = Encoding.GetEncoding(code_type).GetBytes(code); //将一组字符编码为一个字节序列.

try

{

encode = Convert.ToBase64String(bytes); //将8位无符号整数数组的子集转换为其等效的,以64为基的数字编码的字符串形式.

}

catch

{

encode = code;

}

return encode;

}

/// <summary>

/// 将字符串使用base64算法解密

/// </summary>

/// <param name="code_type">编码类型</param>

/// <param name="code">已用base64算法加密的字符串</param>

/// <returns>解密后的字符串</returns>

public string DecodeBase64(string code_type, string code)

{

string decode = "";

byte[] bytes = Convert.FromBase64String(code); //将2进制编码转换为8位无符号整数数组.

try

{

decode = Encoding.GetEncoding(code_type).GetString(bytes); //将指定字节数组中的一个字节序列解码为一个字符串。

}

catch

{

decode = code;

}

return decode;

}

/// <summary>

/// 获取本机的MAC地址

/// </summary>

/// <returns></returns>

public static string GetLocalMac()

{

string mac = null;

ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");

ManagementObjectCollection queryCollection = query.Get();

foreach (ManagementObject mo in queryCollection)

{

if (mo["IPEnabled"].ToString() == "True")

mac = mo["MacAddress"].ToString();

}

return (mac);

}

/// <summary>

/// 得到CPU序列号

/// </summary>

/// <returns></returns>

public static string GetCpuID()

{

try

{

//获取CPU序列号代码

string cpuInfo = "";//cpu序列号

ManagementClass mc = new ManagementClass("Win32_Processor");

ManagementObjectCollection moc = mc.GetInstances();

foreach (ManagementObject mo in moc)

{

cpuInfo = mo.Properties["ProcessorId"].Value.ToString();

}

moc = null;

mc = null;

return cpuInfo;

}

catch

{

return "unknow";

}

finally

{

}

}

/// <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

{

RegistryKey rootKey = Registry.LocalMachine.CreateSubKey(@"SOFTWARE/JX/Register");

rootKey.SetValue(key, value);

rootKey.Close();

}

catch (Exception)

{

throw;

}

}

/// <summary>

/// 创建公钥文件

/// </summary>

/// <param name="path"></param>

/// <param name="publickey"></param>

public void CreatePublicKeyXML(string path, string publickey)

{

try

{

FileStream publickeyxml = new FileStream(path, FileMode.Create);

StreamWriter sw = new StreamWriter(publickeyxml);

sw.WriteLine(publickey);

sw.Close();

publickeyxml.Close();

}

catch

{

throw;

}

}

/// <summary>

/// 创建私钥文件

/// </summary>

/// <param name="path"></param>

/// <param name="privatekey"></param>

public void CreatePrivateKeyXML(string path, string privatekey)

{

try

{

FileStream privatekeyxml = new FileStream(path, FileMode.Create);

StreamWriter sw = new StreamWriter(privatekeyxml);

sw.WriteLine(privatekey);

sw.Close();

privatekeyxml.Close();

}

catch

{

throw;

}

}

/// <summary>

/// 读取公钥

/// </summary>

/// <param name="path"></param>

/// <returns></returns>

public string ReadPublicKey(string path)

{

StreamReader reader = new StreamReader(path);

string publickey = reader.ReadToEnd();

reader.Close();

return publickey;

}

/// <summary>

/// 读取私钥

/// </summary>

/// <param name="path"></param>

/// <returns></returns>

public string ReadPrivateKey(string path)

{

StreamReader reader = new StreamReader(path);

string privatekey = reader.ReadToEnd();

reader.Close();

return privatekey;

}

/// <summary>

/// 初始化注册表，程序运行时调用，在调用之前更新公钥xml

/// </summary>

/// <param name="path">公钥路径</param>

public void InitialReg(string path)

{

Registry.LocalMachine.CreateSubKey(@"SOFTWARE/JX/Register");

Random ra = new Random();

string publickey = this.ReadPublicKey(path);

if (Registry.LocalMachine.OpenSubKey(@"SOFTWARE/JX/Register").ValueCount <= 0)

{

this.WriteReg("RegisterRandom", ra.Next(1, 100000).ToString());

this.WriteReg("RegisterPublicKey", publickey);

}

else

{

this.WriteReg("RegisterPublicKey", publickey);

}

}

}

二、私钥加密公钥解密

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/// <summary>

/// 非对称RSA加密类 可以参考

/// http://www.cnblogs.com/hhh/archive/2011/06/03/2070692.html
/// http://blog.csdn.net/zhilunchen/article/details/2943158
/// http://www.cnblogs.com/yyl8781697/archive/2013/04/28/RSA.html
/// 若是私匙加密 则需公钥解密

/// 反正公钥加密 私匙来解密

/// 需要BigInteger类来辅助

/// </summary>

public static class RSAHelper

{

/// <summary>

/// RSA的容器 可以解密的源字符串长度为 DWKEYSIZE/8-11

/// </summary>

public const int DWKEYSIZE = 1024;

/// <summary>

/// RSA加密的密匙结构 公钥和私匙

/// </summary>

//public struct RSAKey

//{

// public string PublicKey { get; set; }

// public string PrivateKey { get; set; }

//}

#region 得到RSA的解谜的密匙对

/// <summary>

/// 得到RSA的解谜的密匙对

/// </summary>

/// <returns></returns>

//public static RSAKey GetRASKey()

//{

// RSACryptoServiceProvider.UseMachineKeyStore = true;

// //声明一个指定大小的RSA容器

// RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider(DWKEYSIZE);

// //取得RSA容易里的各种参数

// RSAParameters p = rsaProvider.ExportParameters(true);

// return new RSAKey()

// {

// PublicKey = ComponentKey(p.Exponent, p.Modulus),

// PrivateKey = ComponentKey(p.D, p.Modulus)

// };

//}

#endregion

#region 检查明文的有效性 DWKEYSIZE/8-11 长度之内为有效 中英文都算一个字符

/// <summary>

/// 检查明文的有效性 DWKEYSIZE/8-11 长度之内为有效 中英文都算一个字符

/// </summary>

/// <param name="source"></param>

/// <returns></returns>

public static bool CheckSourceValidate(string source)

{

return (DWKEYSIZE / 8 - 11) >= source.Length;

}

#endregion

#region 组合解析密匙

/// <summary>

/// 组合成密匙字符串

/// </summary>

/// <param name="b1"></param>

/// <param name="b2"></param>

/// <returns></returns>

public static string ComponentKey(byte[] b1, byte[] b2)

{

List<byte> list = new List<byte>();

//在前端加上第一个数组的长度值 这样今后可以根据这个值分别取出来两个数组

list.Add((byte)b1.Length);

list.AddRange(b1);

list.AddRange(b2);

byte[] b = list.ToArray<byte>();

return Convert.ToBase64String(b);

}

/// <summary>

/// 解析密匙

/// </summary>

/// <param name="key">密匙</param>

/// <param name="b1">RSA的相应参数1</param>

/// <param name="b2">RSA的相应参数2</param>

private static void ResolveKey(string key, out byte[] b1, out byte[] b2)

{

//从base64字符串 解析成原来的字节数组

byte[] b = Convert.FromBase64String(key);

//初始化参数的数组长度

b1 = new byte[b[0]];

b2 = new byte[b.Length - b[0] - 1];

//将相应位置是值放进相应的数组

for (int n = 1, i = 0, j = 0; n < b.Length; n++)

{

if (n <= b[0])

{

b1[i++] = b
;

}

else

{

b2[j++] = b
;

}

}

}

#endregion

#region 字符串加密解密 公开方法

/// <summary>

/// 字符串加密

/// </summary>

/// <param name="source">源字符串 明文</param>

/// <param name="key">密匙</param>

/// <returns>加密遇到错误将会返回原字符串</returns>

public static string EncryptString(string source, string key)

{

string encryptString = string.Empty;

byte[] d;

byte[] n;

try

{

if (!CheckSourceValidate(source))

{

throw new Exception("source string too long");

}

//解析这个密钥

ResolveKey(key, out d, out n);

BigInteger biN = new BigInteger(n);

BigInteger biD = new BigInteger(d);

encryptString = EncryptString(source, biD, biN);

}

catch

{

encryptString = source;

}

return encryptString;

}

/// <summary>

/// 字符串解密

/// </summary>

/// <param name="encryptString">密文</param>

/// <param name="key">密钥</param>

/// <returns>遇到解密失败将会返回空字符串</returns>

public static string DecryptString(string encryptString, string key)

{

string source = string.Empty;

byte[] e;

byte[] n;

try

{

//解析这个密钥

ResolveKey(key, out e, out n);

BigInteger biE = new BigInteger(e);

BigInteger biN = new BigInteger(n);

source = DecryptString(encryptString, biE, biN);

}

catch

{

}

return source;

}

#endregion

#region 字符串加密解密 私有 实现加解密的实现方法

/// <summary>

/// 用指定的密匙加密

/// </summary>

/// <param name="source">明文</param>

/// <param name="d">可以是RSACryptoServiceProvider生成的D</param>

/// <param name="n">可以是RSACryptoServiceProvider生成的Modulus</param>

/// <returns>返回密文</returns>

private static string EncryptString(string source, BigInteger d, BigInteger n)

{

int len = source.Length;

int len1 = 0;

int blockLen = 0;

if ((len % 128) == 0)

len1 = len / 128;

else

len1 = len / 128 + 1;

string block = "";

StringBuilder result = new StringBuilder();

for (int i = 0; i < len1; i++)

{

if (len >= 128)

blockLen = 128;

else

blockLen = len;

block = source.Substring(i * 128, blockLen);

byte[] oText = System.Text.Encoding.Default.GetBytes(block);

BigInteger biText = new BigInteger(oText);

BigInteger biEnText = biText.modPow(d, n);

string temp = biEnText.ToHexString();

result.Append(temp).Append("@");

len -= blockLen;

}

return result.ToString().TrimEnd('@');

}

/// <summary>

/// 用指定的密匙加密

/// </summary>

/// <param name="source">密文</param>

/// <param name="e">可以是RSACryptoServiceProvider生成的Exponent</param>

/// <param name="n">可以是RSACryptoServiceProvider生成的Modulus</param>

/// <returns>返回明文</returns>

private static string DecryptString(string encryptString, BigInteger e, BigInteger n)

{

StringBuilder result = new StringBuilder();

string[] strarr1 = encryptString.Split(new char[] { '@' }, StringSplitOptions.RemoveEmptyEntries);

for (int i = 0; i < strarr1.Length; i++)

{

string block = strarr1[i];

BigInteger biText = new BigInteger(block, 16);

BigInteger biEnText = biText.modPow(e, n);

string temp = System.Text.Encoding.Default.GetString(biEnText.getBytes());

result.Append(temp);

}

return result.ToString();

}

#endregion

/// <summary>

/// 将字符串使用base64算法加密

/// </summary>

/// <param name="code_type">编码类型</param>

/// <param name="code">待加密的字符串</param>

/// <returns>加密后的字符串</returns>

public static string EncodeBase64(string code_type, string code)

{

string encode = "";

byte[] bytes = Encoding.GetEncoding(code_type).GetBytes(code); //将一组字符编码为一个字节序列.

try

{

encode = Convert.ToBase64String(bytes); //将8位无符号整数数组的子集转换为其等效的,以64为基的数字编码的字符串形式.

}

catch

{

encode = code;

}

return encode;

}

/// <summary>

/// 将字符串使用base64算法解密

/// </summary>

/// <param name="code_type">编码类型</param>

/// <param name="code">已用base64算法加密的字符串</param>

/// <returns>解密后的字符串</returns>

public static string DecodeBase64(string code_type, string code)

{

string decode = "";

byte[] bytes = Convert.FromBase64String(code); //将2进制编码转换为8位无符号整数数组.

try

{

decode = Encoding.GetEncoding(code_type).GetString(bytes); //将指定字节数组中的一个字节序列解码为一个字符串。

}

catch

{

decode = code;

}

return decode;

}

/// <summary>

/// 读取公钥或私钥

/// </summary>

/// <param name="includePrivateparameters">为True则包含私钥</param>

/// <param name="path">Xml格式保存的完整公/私钥路径</param>

/// <returns>公钥或私钥参数形式 </returns>

public static RSAParameters ReadKey(bool includePrivateparameters,string path)

{

using (StreamReader reader = new StreamReader(path))

{

string publickey = reader.ReadToEnd();

RSACryptoServiceProvider rcp = new RSACryptoServiceProvider();

rcp.FromXmlString(publickey);

return rcp.ExportParameters(includePrivateparameters);

}

}

/// <summary>

/// 获取本机的MAC地址

/// </summary>

/// <returns></returns>

public static string GetLocalMac()

{

string mac = null;

ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");

ManagementObjectCollection queryCollection = query.Get();

foreach (ManagementObject mo in queryCollection)

{

if (mo["IPEnabled"].ToString() == "True")

mac = mo["MacAddress"].ToString();

}

return (mac);

}

/// <summary>

/// 得到CPU序列号

/// </summary>

/// <returns></returns>

public static string GetCpuID()

{

try

{

//获取CPU序列号代码

string cpuInfo = "";//cpu序列号

ManagementClass mc = new ManagementClass("Win32_Processor");

ManagementObjectCollection moc = mc.GetInstances();

foreach (ManagementObject mo in moc)

{

cpuInfo = mo.Properties["ProcessorId"].Value.ToString();

}

moc = null;

mc = null;

return cpuInfo;

}

catch

{

return "unknow";

}

finally

{

}

}

/// <summary>

/// 获取硬盘ID

/// </summary>

/// <returns>硬盘ID</returns>

public static 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 static 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 static void WriteReg(string key, string value)

{

try

{

RegistryKey rootKey = Registry.LocalMachine.CreateSubKey(@"SOFTWARE/JX/Register");

rootKey.SetValue(key, value);

rootKey.Close();

}

catch (Exception)

{

throw;

}

}

}

使用场景：如共享软件加密，我们需要用私钥加密注册码或注册文件，发给用户，用户用公钥解密注册码或注册文件进行合法性验证。

RSA算法实现激活码注册方式的原理如下：

1. 生成一对公钥E和私钥D（供软件注册模板和注册机使用）；

2. 用户安装软件后，软件注册模板提取用户机器指纹信息（如：MAC地址、CPU序列号、硬盘序列号等），并通过其它的编码算法（如BASE64）生成一个申请码C；

3. 用户将申请码C发给软件开发商。软件开发商通过注册机采用私钥D加密申请码C后生成激活码F。软件供应商将激活码F发给用户。

4. 用户输入激活码F，软件注册模板采用公钥E对激活码F解码后生成G(即：用户机器特征信息)，然后软件注册模板提取用户机器的特定信息后进行编码。将编码的结果与G进行比较，如果相等则用户合法，完成授权，否则授权失败。

[csharp] view
plaincopy

//应用程序注册模块

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

string cpu = RSAHelper.GetCpuID();

string _申请码C = RSAHelper.EncodeBase64("utf-8", cpu);

textEdit申请码.Text = _申请码C;

}

private void simpleButton注册_Click(object sender, EventArgs e)

{

string publicKeyPath = @"C://PublicKey.xml";

RSAParameters pm = RSAHelper.ReadKey(false, publicKeyPath);

string _PublicKey = RSAHelper.ComponentKey(pm.Exponent, pm.Modulus);

string cpu = RSAHelper.DecryptString(textEdit激活码.Text, _PublicKey);

if (cpu == textEdit申请码.Text)

{

MessageBox.Show("注册成功");

}

else

{

MessageBox.Show("注册失败");

}

}

}

[csharp] view
plaincopy

/// <summary>

/// 注册机

/// </summary>

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void simpleButton生成激活码_Click(object sender, EventArgs e)

{

string privateKeyPath = @"C://PrivateKey.xml";

RSAParameters pm = RSAHelper.ReadKey(true, privateKeyPath);

string _PrivateKey = RSAHelper.ComponentKey(pm.D, pm.Modulus);

textEdit激活码.Text = RSAHelper.EncryptString(textEdit申请码.Text, _PrivateKey);

}

}