pesent C#

Author: usecodelee

Present/.vs/Present/v14/.suo

@@ -0,0 +1,189 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Windows.Forms;
+
+namespace Present
+{
+    public partial class Form1 : Form
+    {
+        public Form1()
+        {
+            InitializeComponent();
+        }
+
+//S盒
+void Sub_bytes(ref byte[] s)
+{
+    byte[] sbox = new byte[]{
+        0x0c, 0x05, 0x06, 0x0b,
+        0x09, 0x00, 0x0a, 0x0d,
+        0x03, 0x0e, 0x0f, 0x08,
+        0x04, 0x07, 0x01, 0x02
+    };
+    for (int i = 0; i < 16; i++)
+    {
+        s[i] = sbox[s[i]];
+    }
+}
+//P变换
+void Exchange(ref byte[] s)
+{
+    byte[] rPx =new byte[]{
+        0,4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,
+        1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61,
+        2,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,
+        3,7,11,15,19,23,27,31,35,39,43,47,51,55,59,63
+    };
+    byte row1, col1, row, col, shift, shift1, tmp;
+    byte[] buf = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+    for (int i = 0; i < 64; i++)
+    {
+        shift1 = 0x08;
+        row1 = Convert.ToByte(i / 4);
+        col1 = Convert.ToByte(i % 4);
+        shift1 >>= col1;
+        shift = 0x08;
+        tmp = rPx[i];
+        row = Convert.ToByte(tmp / 4);
+        col = Convert.ToByte(tmp % 4);
+        shift >>= col;
+        if ((shift & s[row]) != 0)
+        {
+
+            buf[row1] |= shift1;
+        }
+    }
+            s = new byte[buf.Length];
+            for (int i = 0; i < s.Length; i++)
+            {
+                s[i] = buf[i];
+            }
+}
+//加密函数
+void UpdataKeys(ref byte[] k, int r)
+{
+    byte[] sbox = new byte[]{
+        0x0c, 0x05, 0x06, 0x0b,
+        0x09, 0x00, 0x0a, 0x0d,
+        0x03, 0x0e, 0x0f, 0x08,
+        0x04, 0x07, 0x01, 0x02
+    };
+    byte[] tmpk1 = new byte[20];
+    int i;
+            for (i = 0; i < 20; i++)
+            {
+                tmpk1[i] = k[i];
+            }
+
+    k[0] = Convert.ToByte(((tmpk1[15] << 1) | (tmpk1[16] >> 3)) & 0x0f);
+    k[1] = Convert.ToByte(((tmpk1[16] << 1) | (tmpk1[17] >> 3)) & 0x0f);
+    k[2] = Convert.ToByte(((tmpk1[17] << 1) | (tmpk1[18] >> 3)) & 0x0f);
+    k[3] = Convert.ToByte(((tmpk1[18] << 1) | (tmpk1[19] >> 3)) & 0x0f);
+    k[4] = Convert.ToByte(((tmpk1[19] << 1) | (tmpk1[0] >> 3)) & 0x0f);
+    k[5] = Convert.ToByte(((tmpk1[0] << 1) | (tmpk1[1] >> 3)) & 0x0f);
+    k[6] = Convert.ToByte(((tmpk1[1] << 1) | (tmpk1[2] >> 3)) & 0x0f);
+    k[7] = Convert.ToByte(((tmpk1[2] << 1) | (tmpk1[3] >> 3)) & 0x0f);
+    k[8] = Convert.ToByte(((tmpk1[3] << 1) | (tmpk1[4] >> 3)) & 0x0f);
+    k[9] = Convert.ToByte(((tmpk1[4] << 1) | (tmpk1[5] >> 3)) & 0x0f);
+    k[10] = Convert.ToByte(((tmpk1[5] << 1) | (tmpk1[6] >> 3)) & 0x0f);
+    k[11] = Convert.ToByte(((tmpk1[6] << 1) | (tmpk1[7] >> 3)) & 0x0f);
+    k[12] = Convert.ToByte(((tmpk1[7] << 1) | (tmpk1[8] >> 3)) & 0x0f);
+    k[13] = Convert.ToByte(((tmpk1[8] << 1) | (tmpk1[9] >> 3)) & 0x0f);
+    k[14] = Convert.ToByte(((tmpk1[9] << 1) | (tmpk1[10] >> 3)) & 0x0f);
+    k[15] = Convert.ToByte(((tmpk1[10] << 1) | (tmpk1[11] >> 3)) & 0x0f);
+    k[16] = Convert.ToByte(((tmpk1[11] << 1) | (tmpk1[12] >> 3)) & 0x0f);
+    k[17] = Convert.ToByte(((tmpk1[12] << 1) | (tmpk1[13] >> 3)) & 0x0f);
+    k[18] = Convert.ToByte(((tmpk1[13] << 1) | (tmpk1[14] >> 3)) & 0x0f);
+    k[19] = Convert.ToByte(((tmpk1[14] << 1) | (tmpk1[15] >> 3)) & 0x0f);
+
+    k[0] = sbox[k[0]];
+
+    r = r << 3;
+
+    k[15] = Convert.ToByte((k[15] ^ (r >> 4)) & 0x0f);
+    k[16] = Convert.ToByte((k[16] ^ (r % 16)) & 0x0f);
+
+}
+
+void AddRoundKeys(ref byte[] p, ref byte[] k)
+{
+            for (int i = 0; i < 16; i++)
+            {
+                p[i] ^= k[i];
+            }
+}
+void Encrypt(ref byte[] p, ref byte[] k)//p:明文   k:密钥
+{
+    int i;
+    for (i = 0; i < 31; i++)
+    {
+        AddRoundKeys(ref p, ref k);
+        Sub_bytes(ref p);
+        Exchange(ref p);
+        UpdataKeys(ref k, i + 1);   //扩展密钥
+                                //	printblock(p); puts("");
+                                //	printblock(k,20);
+                                //	puts("");
+    }
+    AddRoundKeys(ref p, ref k);
+}
+        private static byte[] strToHexByte(string hexString)
+        {
+            hexString = hexString.Replace(" ", "").Replace("0x", "");
+            byte[] returnBytes = new byte[hexString.Length];
+            for (int i = 0; i < returnBytes.Length; i++)
+                returnBytes[i] = Convert.ToByte(hexString.Substring(i, 1), 16);
+            return returnBytes;
+        }
+
+        private void btnOK_Click(object sender, EventArgs e)
+        {
+            byte[] p = strToHexByte(tbxP.Text.Trim());
+            //byte[] p = new byte[] {0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
+            //    0x0f,0x0f,0x0f,0x0f,0x0f,0x0f,0x0f,0x0f };
+            byte[] k = strToHexByte(tbxKey.Text.Trim());
+
+            Encrypt(ref p, ref k);
+            tbxRes.Text = "";
+            for (int i = 0; i < p.Length; i++)
+            {
+                tbxRes.AppendText(p[i].ToString("X"));
+            }
+        }
+
+        private void label1_Click(object sender, EventArgs e)
+        {
+
+        }
+
+        private void tbxP_TextChanged(object sender, EventArgs e)
+        {
+
+        }
+
+        private void tbxKey_TextChanged(object sender, EventArgs e)
+        {
+
+        }
+
+        private void label2_Click(object sender, EventArgs e)
+        {
+
+        }
+
+        private void tbxRes_TextChanged(object sender, EventArgs e)
+        {
+
+        }
+
+        private void label3_Click(object sender, EventArgs e)
+        {
+
+        }
+    }
+}