基本信息
源码名称:基于RSA的数字签名和验证C#源码
源码大小:0.10M
文件格式:.rar
开发语言:C#
更新时间:2013-09-20
   友情提示:(无需注册或充值,赞助后即可获取资源下载链接)

     嘿,亲!知识可是无价之宝呢,但咱这精心整理的资料也耗费了不少心血呀。小小地破费一下,绝对物超所值哦!如有下载和支付问题,请联系我们QQ(微信同号):813200300

本次赞助数额为: 2 元 
   源码介绍


/* 备注:
 * 若要使用公钥系统对消息进行数字签名,发送方先向该消息应用哈希函数以创建消息摘要。
 * 然后,发送方用自己的私钥对消息摘要进行加密,以创建发送方的个人签名。在收到消息和
 * 签名后,接收方使用发送方的公钥解密该签名,以恢复消息摘要,并使用发送方所用的同一
 * 哈希算法对该消息进行哈希运算。如果接收方计算的消息摘要与从发送方收到的消息摘要完
 * 全匹配,则接收方可以假定消息在传输中未被更改。请注意,因为发送方的公钥是公共知识,
 * 所以任何人都可以验证签名。
 */

using System;
using System.Security.Cryptography;
using System.Text;

class RSACSPSample
{
    static void Main()
    {
        try
        {

            string str_DataToSign = @"Data to Sign!Data to Sign!Data to Sign!";
            Console.WriteLine("原文:"   str_DataToSign);
            Console.WriteLine("长度:"   str_DataToSign.Length.ToString());
            Console.WriteLine();

            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            string str_Private_Key = Convert.ToBase64String( RSAalg.ExportCspBlob(true) );
            string str_Public_Key = Convert.ToBase64String( RSAalg.ExportCspBlob(false) );
            Console.WriteLine("公钥:"   str_Public_Key);
            Console.WriteLine();
            Console.WriteLine("私钥:"   str_Private_Key);
            Console.WriteLine();

            string str_SignedData = HashAndSign(str_DataToSign, str_Private_Key);// Hash and sign the data.
            Console.WriteLine("签名数据:"   str_SignedData);
            Console.WriteLine();

            if (VerifySignedHash(str_DataToSign, str_SignedData, str_Public_Key))
            {
                Console.WriteLine("验证签名OK.");
            }
            else
            {
                Console.WriteLine("签名不匹配!");
            }
            Console.WriteLine();

        }
        catch (ArgumentNullException)
        {
            Console.WriteLine("The data was not signed or verified");

        }
    }

    //对数据签名
    public static string HashAndSign(string str_DataToSign, string str_Private_Key)
    {
        ASCIIEncoding ByteConverter = new ASCIIEncoding();
        byte[] DataToSign = ByteConverter.GetBytes(str_DataToSign);
        try
        {
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();
            RSAalg.ImportCspBlob( Convert.FromBase64String(str_Private_Key) );
            byte[] signedData = RSAalg.SignData(DataToSign, new SHA1CryptoServiceProvider());
            string str_SignedData = Convert.ToBase64String(signedData);
            return str_SignedData;
        }
        catch (CryptographicException e)
        {
            Console.WriteLine(e.Message);
            return null;
        }
    }

    //验证签名
    public static bool VerifySignedHash(string str_DataToVerify, string str_SignedData, string str_Public_Key)
    {
        byte[] SignedData = Convert.FromBase64String(str_SignedData);

        ASCIIEncoding ByteConverter = new ASCIIEncoding();
        byte[] DataToVerify = ByteConverter.GetBytes(str_DataToVerify);
        try
        {
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();
            RSAalg.ImportCspBlob( Convert.FromBase64String(str_Public_Key) );

            return RSAalg.VerifyData(DataToVerify, new SHA1CryptoServiceProvider(), SignedData);

        }
        catch (CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return false;
        }
    }
}