aes.cpp

使用V C++编程实现使用Rijindeal算法的高级数据加密算法AES。

using System;
using System.Security.Cryptography;
using System.Text;
class Example
{
    //输入为一个不定长的字符串，输出为32个字符的16进制的字符串
    static string getMd5Hash(string input)
    {
        //创建一个新的工程 
        MD5 md5Hasher = MD5.Create();
        //将输入的字符串存入一个字节数组，并计算其Hash值 
        byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));
        // 创建一个Stringbuilder存放字节
        StringBuilder sBuilder = new StringBuilder();
        // 循环计算每个字节的Hash值
        for (int i = 0; i < data.Length; i++)
        {
            sBuilder.Append(data[i].ToString("x2"));
        }
        // 返回这个16进制的字符串
        return sBuilder.ToString();
    }
    //验证此Hash值
    static bool verifyMd5Hash(string input, string hash)
    {
        string hashOfInput = getMd5Hash(input);
        StringComparer comparer = StringComparer.OrdinalIgnoreCase;
        if (0 == comparer.Compare(hashOfInput, hash))
        {
            return true;
        }
        else
        {
            return false;
        }
    }
        static void Main()
    {
        string source ;
        Console.Write("Please input your string:");
        source=Console.ReadLine();    
        string hash = getMd5Hash(source);
        Console.WriteLine("The MD5 hash of " + source + " is: " + hash + ".");
        Console.WriteLine("Verifying the hash...");
        if (verifyMd5Hash(source, hash))
        {
            Console.WriteLine("The hashes are the same.");
        }
        else
        {
            Console.WriteLine("The hashes are not same.");
        }
    }
}