form1.cs

AES和MD5算法源码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Collections;

namespace Cryptography
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        /* 040803 
           信息安全
           卢金杰
        */
        //  MD5代码部分开始
        class MD5code
        {
            private static UInt32 A;
            private static UInt32 B;
            private static UInt32 C;
            private static UInt32 D;

            private const int S11 = 7;
            private const int S12 = 12;
            private const int S13 = 17;
            private const int S14 = 22;
            private const int S21 = 5;
            private const int S22 = 9;
            private const int S23 = 14;
            private const int S24 = 20;
            private const int S31 = 4;
            private const int S32 = 11;
            private const int S33 = 16;
            private const int S34 = 23;
            private const int S41 = 6;
            private const int S42 = 10;
            private const int S43 = 15;
            private const int S44 = 21;

            private static UInt32 F(UInt32 x, UInt32 y, UInt32 z)             // F(X,Y,Z) =(X&Y)|((~X)&Z) 
            {
                return (x & y) | ((~x) & z);                                  
            }
            
            private static UInt32 G(UInt32 x, UInt32 y, UInt32 z)             // G(X,Y,Z) = (X&Z)|(Y&(~Z)) 
            {
                return (x & z) | (y & (~z));
            }
            
            private static UInt32 H(UInt32 x, UInt32 y, UInt32 z)             // H(X,Y,Z) = X^Y^Z 
            {
                return x ^ y ^ z;
            }
            
            private static UInt32 I(UInt32 x, UInt32 y, UInt32 z)            // I(X,Y,Z)=Y^(X|(~Z)) 
            {
                return y ^ (x | (~z));
            }
            
            private static void FF(ref UInt32 a, UInt32 b, UInt32 c, UInt32 d, UInt32 mj, int s, UInt32 ti)
            {
                a = a + F(b, c, d) + mj + ti;
                a = a << s | a >> (32 - s);
                a += b;
            }

            private static void GG(ref UInt32 a, UInt32 b, UInt32 c, UInt32 d, UInt32 mj, int s, UInt32 ti)
            {
                a = a + G(b, c, d) + mj + ti;
                a = a << s  | a >> (32 - s);
                a += b;
            }

            private static void HH(ref UInt32 a, UInt32 b, UInt32 c, UInt32 d, UInt32 mj, int s, UInt32 ti)
            {
                a = a + H(b, c, d) + mj + ti;
                a = a << s | a >> (32 - s);
                a += b;
            }

            private static void II(ref UInt32 a, UInt32 b, UInt32 c, UInt32 d, UInt32 mj, int s, UInt32 ti)
            {
                a = a + I(b, c, d) + mj + ti;
                a = a << s | a >> (32 - s);
                a += b;
            }

            private static void MD5_Init()
            {
                A = 0x67452301; 
                B = 0xefcdab89; 
                C = 0x98badcfe; 
                D = 0x10325476; 
            }

            private static UInt32[] MD5_Append(byte[] input)
            {
                int zeros = 0;
                int ones = 1;
                int size = 0;
                int n = input.Length;
                int m = n % 64;
                if (m < 56)
                {
                    zeros = 55 - m;
                    size = n - m + 64;
                }
                else if (m == 56)
                {
                    zeros = 0;
                    ones = 0;
                    size = n + 8;
                }
                else
                {
                    zeros = 63 - m + 56;
                    size = n + 64 - m + 64;
                }
                ArrayList bs = new ArrayList(input);
                if (ones == 1)
                {
                    bs.Add((byte)0x80); 
                }
                for (int i = 0; i < zeros; i++)
                {
                    bs.Add((byte)0);
                }

                UInt64 N = (UInt64)n * 8;
                byte h1 = (byte)(N & 0xFF);
                byte h2 = (byte)((N >> 8) & 0xFF);
                byte h3 = (byte)((N >> 16) & 0xFF);
                byte h4 = (byte)((N >> 24) & 0xFF);
                byte h5 = (byte)((N >> 32) & 0xFF);
                byte h6 = (byte)((N >> 40) & 0xFF);
                byte h7 = (byte)((N >> 48) & 0xFF);
                byte h8 = (byte)(N >> 56);
                bs.Add(h1);
                bs.Add(h2);
                bs.Add(h3);
                bs.Add(h4);
                bs.Add(h5);
                bs.Add(h6);
                bs.Add(h7);
                bs.Add(h8);
                
                byte[] ts = (byte[])bs.ToArray(typeof(byte));

                UInt32[] output = new UInt32[size / 4];
                
                for (Int64 i = 0, j = 0; i < size; j++, i += 4)
                {
                    output[j] = (UInt32)(ts[i] | ts[i + 1] << 8 | ts[i + 2] << 16 | ts[i + 3] << 24);
                }
                return output;
            }
            
            private static UInt32[] MD5_Trasform(UInt32[] x)
            {
                UInt32 a, b, c, d;
                for (int k = 0; k < x.Length; k += 16)
                {
                    a = A;
                    b = B;
                    c = C;
                    d = D;

                    // 第一轮
                    FF(ref a, b, c, d, x[k + 0], S11, 0xd76aa478); /* 1 */
                    FF(ref d, a, b, c, x[k + 1], S12, 0xe8c7b756); /* 2 */
                    FF(ref c, d, a, b, x[k + 2], S13, 0x242070db); /* 3 */
                    FF(ref b, c, d, a, x[k + 3], S14, 0xc1bdceee); /* 4 */
                    FF(ref a, b, c, d, x[k + 4], S11, 0xf57c0faf); /* 5 */
                    FF(ref d, a, b, c, x[k + 5], S12, 0x4787c62a); /* 6 */
                    FF(ref c, d, a, b, x[k + 6], S13, 0xa8304613); /* 7 */
                    FF(ref b, c, d, a, x[k + 7], S14, 0xfd469501); /* 8 */
                    FF(ref a, b, c, d, x[k + 8], S11, 0x698098d8); /* 9 */
                    FF(ref d, a, b, c, x[k + 9], S12, 0x8b44f7af); /* 10 */
                    FF(ref c, d, a, b, x[k + 10], S13, 0xffff5bb1); /* 11 */
                    FF(ref b, c, d, a, x[k + 11], S14, 0x895cd7be); /* 12 */
                    FF(ref a, b, c, d, x[k + 12], S11, 0x6b901122); /* 13 */
                    FF(ref d, a, b, c, x[k + 13], S12, 0xfd987193); /* 14 */
                    FF(ref c, d, a, b, x[k + 14], S13, 0xa679438e); /* 15 */
                    FF(ref b, c, d, a, x[k + 15], S14, 0x49b40821); /* 16 */

                    // 第二轮
                    GG(ref a, b, c, d, x[k + 1], S21, 0xf61e2562); /* 17 */
                    GG(ref d, a, b, c, x[k + 6], S22, 0xc040b340); /* 18 */
                    GG(ref c, d, a, b, x[k + 11], S23, 0x265e5a51); /* 19 */
                    GG(ref b, c, d, a, x[k + 0], S24, 0xe9b6c7aa); /* 20 */
                    GG(ref a, b, c, d, x[k + 5], S21, 0xd62f105d); /* 21 */
                    GG(ref d, a, b, c, x[k + 10], S22, 0x2441453); /* 22 */
                    GG(ref c, d, a, b, x[k + 15], S23, 0xd8a1e681); /* 23 */
                    GG(ref b, c, d, a, x[k + 4], S24, 0xe7d3fbc8); /* 24 */
                    GG(ref a, b, c, d, x[k + 9], S21, 0x21e1cde6); /* 25 */
                    GG(ref d, a, b, c, x[k + 14], S22, 0xc33707d6); /* 26 */
                    GG(ref c, d, a, b, x[k + 3], S23, 0xf4d50d87); /* 27 */
                    GG(ref b, c, d, a, x[k + 8], S24, 0x455a14ed); /* 28 */
                    GG(ref a, b, c, d, x[k + 13], S21, 0xa9e3e905); /* 29 */
                    GG(ref d, a, b, c, x[k + 2], S22, 0xfcefa3f8); /* 30 */
                    GG(ref c, d, a, b, x[k + 7], S23, 0x676f02d9); /* 31 */
                    GG(ref b, c, d, a, x[k + 12], S24, 0x8d2a4c8a); /* 32 */

                    // 第三轮
                    HH(ref a, b, c, d, x[k + 5], S31, 0xfffa3942); /* 33 */
                    HH(ref d, a, b, c, x[k + 8], S32, 0x8771f681); /* 34 */
                    HH(ref c, d, a, b, x[k + 11], S33, 0x6d9d6122); /* 35 */
                    HH(ref b, c, d, a, x[k + 14], S34, 0xfde5380c); /* 36 */
                    HH(ref a, b, c, d, x[k + 1], S31, 0xa4beea44); /* 37 */
                    HH(ref d, a, b, c, x[k + 4], S32, 0x4bdecfa9); /* 38 */
                    HH(ref c, d, a, b, x[k + 7], S33, 0xf6bb4b60); /* 39 */
                    HH(ref b, c, d, a, x[k + 10], S34, 0xbebfbc70); /* 40 */
                    HH(ref a, b, c, d, x[k + 13], S31, 0x289b7ec6); /* 41 */
                    HH(ref d, a, b, c, x[k + 0], S32, 0xeaa127fa); /* 42 */
                    HH(ref c, d, a, b, x[k + 3], S33, 0xd4ef3085); /* 43 */
                    HH(ref b, c, d, a, x[k + 6], S34, 0x4881d05); /* 44 */
                    HH(ref a, b, c, d, x[k + 9], S31, 0xd9d4d039); /* 45 */
                    HH(ref d, a, b, c, x[k + 12], S32, 0xe6db99e5); /* 46 */
                    HH(ref c, d, a, b, x[k + 15], S33, 0x1fa27cf8); /* 47 */
                    HH(ref b, c, d, a, x[k + 2], S34, 0xc4ac5665); /* 48 */

                    // 第四轮
                    II(ref a, b, c, d, x[k + 0], S41, 0xf4292244); /* 49 */
                    II(ref d, a, b, c, x[k + 7], S42, 0x432aff97); /* 50 */
                    II(ref c, d, a, b, x[k + 14], S43, 0xab9423a7); /* 51 */
                    II(ref b, c, d, a, x[k + 5], S44, 0xfc93a039); /* 52 */
                    II(ref a, b, c, d, x[k + 12], S41, 0x655b59c3); /* 53 */
                    II(ref d, a, b, c, x[k + 3], S42, 0x8f0ccc92); /* 54 */
                    II(ref c, d, a, b, x[k + 10], S43, 0xffeff47d); /* 55 */
                    II(ref b, c, d, a, x[k + 1], S44, 0x85845dd1); /* 56 */
                    II(ref a, b, c, d, x[k + 8], S41, 0x6fa87e4f); /* 57 */
                    II(ref d, a, b, c, x[k + 15], S42, 0xfe2ce6e0); /* 58 */
                    II(ref c, d, a, b, x[k + 6], S43, 0xa3014314); /* 59 */
                    II(ref b, c, d, a, x[k + 13], S44, 0x4e0811a1); /* 60 */
                    II(ref a, b, c, d, x[k + 4], S41, 0xf7537e82); /* 61 */
                    II(ref d, a, b, c, x[k + 11], S42, 0xbd3af235); /* 62 */
                    II(ref c, d, a, b, x[k + 2], S43, 0x2ad7d2bb); /* 63 */
                    II(ref b, c, d, a, x[k + 9], S44, 0xeb86d391); /* 64 */

                    A += a;
                    B += b;
                    C += c;
                    D += d;
                }
                return new UInt32[] { A, B, C, D };
            }

            public static byte[] MD5Array(byte[] input)
            {
                MD5_Init();
                UInt32[] block = MD5_Append(input);
                UInt32[] bits = MD5_Trasform(block);

                byte[] output = new byte[bits.Length * 4];
                for (int i = 0, j = 0; i < bits.Length; i++, j += 4)
                {
                    output[j] = (byte)(bits[i] & 0xff);
                    output[j + 1] = (byte)((bits[i] >> 8) & 0xff);
                    output[j + 2] = (byte)((bits[i] >> 16) & 0xff);
                    output[j + 3] = (byte)((bits[i] >> 24) & 0xff);
                }
                return output;
            }

            public static string ArrayToHexString(byte[] array, bool uppercase)
            {
                string hexString = "";
                string format = "x2";
                if (uppercase)
                {
                    format = "X2";
                }
                foreach (byte b in array)
                {
                    hexString += b.ToString(format);
                }
                return hexString;
            }

            public byte[] MDString(string message)
            {
                char[] c = message.ToCharArray();
                byte[] b = new byte[c.Length];
                for (int i = 0; i < c.Length; i++)
                {
                    b[i] = (byte)c[i];
                }
                return b;
            }

            public string MD5HashCode(byte[] b)
            {
                byte[] digest = MD5Array(b);
                return ArrayToHexString(digest, false);
            }
        }

        MD5code md5 = new MD5code();
        public string message = "";

        private void randomInput_Click(object sender, EventArgs e)
        {
            int number, q;
            string code = string.Empty;
            Random random = new Random();
            q = random.Next(0, 129);
            for (int i = 0; i < q; i++)
            {
                number = random.Next(0, 9);
                code = code + number.ToString();
            }
            messageInput.Clear();
            HashCodeOutput.Clear();
            messageInput.Text = code;
        }

        private void HashCode_Click(object sender, EventArgs e)
        {
            message = messageInput.Text;
            byte[] b = md5.MDString(message);
            HashCodeOutput.Text = md5.MD5HashCode(b);
        }

        private void openMessage_Click(object sender, EventArgs e)