(C#加密)幻术-大踲无形-优快云博客

首先:我看下面的代码只是知道大概的原理核心算法还是不太清楚~~有清楚的麻烦回复下谢谢咯咯
--这也是看Msdn就是把在一个图片上隐藏数据

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Text;

namespace Steganography

{

/**//// <summary>

/// Summary description for SteganographyForm.

/// </summary>

public class SteganographyForm : System.Windows.Forms.Form

{

private System.Windows.Forms.Button buttonHideMessage;

private System.Windows.Forms.Panel panelOriginalImage;

private System.Windows.Forms.TextBox textBoxOriginalMessage;

private System.Windows.Forms.Panel panelModifiedImage;

private System.Windows.Forms.GroupBox groupBox1;

private System.Windows.Forms.GroupBox groupBox3;

private System.Windows.Forms.GroupBox groupBox4;

private System.Windows.Forms.Button buttonExtractMessage;

private System.Windows.Forms.TextBox textBoxExtractedlMessage;

private System.Windows.Forms.GroupBox groupBox2;

/**//// <summary>

/// Required designer variable.

/// </summary>

private System.ComponentModel.Container components = null;

public SteganographyForm()

{

// Required for Windows Form Designer support

InitializeComponent();

// TODO: Add any constructor code after InitializeComponent call

try

{

//load original bitmap from a file

bitmapOriginal = (Bitmap)Bitmap.FromFile(

@"..\..\katie_plaintext.jpg");

//center to screen

this.CenterToScreen( );

}

catch (Exception ex)

{

MessageBox.Show(

"Error loading image. " +

ex.Message );

}

/**//// <summary>

/// Clean up any resources being used.

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.Dispose();

}

base.Dispose( disposing );

}

Windows Form Designer generated code#region Windows Form Designer generated code

/**//// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

this.buttonHideMessage = new System.Windows.Forms.Button();

this.panelOriginalImage = new System.Windows.Forms.Panel();

this.textBoxOriginalMessage = new System.Windows.Forms.TextBox();

this.panelModifiedImage = new System.Windows.Forms.Panel();

this.groupBox1 = new System.Windows.Forms.GroupBox();

this.groupBox3 = new System.Windows.Forms.GroupBox();

this.groupBox4 = new System.Windows.Forms.GroupBox();

this.buttonExtractMessage = new System.Windows.Forms.Button();

this.textBoxExtractedlMessage = new System.Windows.Forms.TextBox();

this.groupBox2 = new System.Windows.Forms.GroupBox();

this.SuspendLayout();

// buttonHideMessage

this.buttonHideMessage.Location = new System.Drawing.Point(10, 594);

this.buttonHideMessage.Name = "buttonHideMessage";

this.buttonHideMessage.Size = new System.Drawing.Size(144, 25);

this.buttonHideMessage.TabIndex = 0;

this.buttonHideMessage.Text = "Hide Message";

this.buttonHideMessage.Click += new System.EventHandler(this.buttonHideMessage_Click);

// panelOriginalImage

this.panelOriginalImage.Location = new System.Drawing.Point(19, 26);

this.panelOriginalImage.Name = "panelOriginalImage";

this.panelOriginalImage.Size = new System.Drawing.Size(412, 521);

this.panelOriginalImage.TabIndex = 0;

// textBoxOriginalMessage

this.textBoxOriginalMessage.Location = new System.Drawing.Point(182, 594);

this.textBoxOriginalMessage.Name = "textBoxOriginalMessage";

this.textBoxOriginalMessage.Size = new System.Drawing.Size(240, 21);

this.textBoxOriginalMessage.TabIndex = 1;

// panelModifiedImage

this.panelModifiedImage.Location = new System.Drawing.Point(461, 26);

this.panelModifiedImage.Name = "panelModifiedImage";

this.panelModifiedImage.Size = new System.Drawing.Size(411, 521);

this.panelModifiedImage.TabIndex = 0;

// groupBox1

this.groupBox1.Location = new System.Drawing.Point(163, 569);

this.groupBox1.Name = "groupBox1";

this.groupBox1.Size = new System.Drawing.Size(279, 60);

this.groupBox1.TabIndex = 3;

this.groupBox1.TabStop = false;

this.groupBox1.Text = "Original Message";

// groupBox3

this.groupBox3.Location = new System.Drawing.Point(10, 9);

this.groupBox3.Name = "groupBox3";

this.groupBox3.Size = new System.Drawing.Size(432, 551);

this.groupBox3.TabIndex = 3;

this.groupBox3.TabStop = false;

this.groupBox3.Text = "Original Image";

// groupBox4

this.groupBox4.Location = new System.Drawing.Point(451, 9);

this.groupBox4.Name = "groupBox4";

this.groupBox4.Size = new System.Drawing.Size(432, 551);

this.groupBox4.TabIndex = 3;

this.groupBox4.TabStop = false;

this.groupBox4.Text = "Modified Image";

// buttonExtractMessage

this.buttonExtractMessage.Location = new System.Drawing.Point(451, 594);

this.buttonExtractMessage.Name = "buttonExtractMessage";

this.buttonExtractMessage.Size = new System.Drawing.Size(144, 25);

this.buttonExtractMessage.TabIndex = 2;

this.buttonExtractMessage.Text = "Extract Message";

this.buttonExtractMessage.Click += new System.EventHandler(this.buttonExtractMessage_Click);

// textBoxExtractedlMessage

this.textBoxExtractedlMessage.Location = new System.Drawing.Point(624, 594);

this.textBoxExtractedlMessage.Name = "textBoxExtractedlMessage";

this.textBoxExtractedlMessage.ReadOnly = true;

this.textBoxExtractedlMessage.Size = new System.Drawing.Size(240, 21);

this.textBoxExtractedlMessage.TabIndex = 3;

// groupBox2

this.groupBox2.Location = new System.Drawing.Point(605, 569);

this.groupBox2.Name = "groupBox2";

this.groupBox2.Size = new System.Drawing.Size(278, 60);

this.groupBox2.TabIndex = 3;

this.groupBox2.TabStop = false;

this.groupBox2.Text = "Extractedl Message";

// SteganographyForm

this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

this.ClientSize = new System.Drawing.Size(930, 672);

this.Controls.Add(this.textBoxOriginalMessage);

this.Controls.Add(this.buttonHideMessage);

this.Controls.Add(this.panelModifiedImage);

this.Controls.Add(this.groupBox1);

this.Controls.Add(this.panelOriginalImage);

this.Controls.Add(this.groupBox3);

this.Controls.Add(this.groupBox4);

this.Controls.Add(this.buttonExtractMessage);

this.Controls.Add(this.textBoxExtractedlMessage);

this.Controls.Add(this.groupBox2);

this.Name = "SteganographyForm";

this.Text = "Steganography";

this.Paint += new System.Windows.Forms.PaintEventHandler(this.SteganographyForm_Paint);

this.ResumeLayout(false);

this.PerformLayout();

}

#endregion

/**//// <summary>

/// The main entry point for the application.

/// </summary>

[STAThread]

static void Main()

{

Application.Run(new SteganographyForm());

}

private void SteganographyForm_Paint(

object sender,

System.Windows.Forms.PaintEventArgs e)

{

try

{

//get Graphics object for painting original

Graphics gPanelOriginal =

Graphics.FromHwnd(

panelOriginalImage.Handle);

//draw original bitmap into panel

gPanelOriginal.DrawImage(

bitmapOriginal, new Point(0 ,0));

//return if there is no modified image yet

if (bitmapModified==null)

return;

//get Graphics object for painting modified

Graphics gPanelModified =

Graphics.FromHwnd(

panelModifiedImage.Handle);

//draw modified bitmap into panel

gPanelModified.DrawImage(

bitmapModified, new Point(0 ,0));

}

catch (Exception ex)

{

MessageBox.Show(

"Error drawing image." +

ex.Message);

this.Close( );

}

private void buttonHideMessage_Click(

object sender, System.EventArgs e)

{

try

{

//show wait cursor

this.Cursor = Cursors.WaitCursor;

//start off with copy of original image

bitmapModified = new Bitmap(

bitmapOriginal,

bitmapOriginal.Width,

bitmapOriginal.Height);

//get original message to be hidden

int numberbytes =

(byte)textBoxOriginalMessage.Text.Length;

byte[] bytesOriginal = new byte[numberbytes+1];

bytesOriginal[0] = (byte)numberbytes;

Encoding.UTF8.GetBytes(

textBoxOriginalMessage.Text,

textBoxOriginalMessage.Text.Length,

bytesOriginal,

1);

//set bits 1, 2, 3 of byte into LSB red

//set bits 4, 5, 6 of byte into LSB green

//set bits 7 and 8 of byte into LSB blue

int byteCount = 0;//----一列一列搞定

for (int i=0; i<bitmapOriginal.Width; i++)

{

for (int j=0; j<bitmapOriginal.Height; j++)

{

if (bytesOriginal.Length==byteCount)

return;

//---返回当前循环的坐标点的颜色数据

Color clrPixelOriginal =

bitmapOriginal.GetPixel(i, j);

//为基元整型类型、枚举类型和 boolean 类型预定义了二元 | 运算符。对于基元整型类型和枚举类型，| 计算操作数的按位“或”。

//--注意这里是对~~血迹之术-的实际应用中的变种

//--这里的算法还是不太清楚估计是-防止三元素重合成1点后产生的错位--如果大大们知道麻烦告诉我下

byte r =

(byte)((clrPixelOriginal.R & ~0x7) |

(bytesOriginal[byteCount]>>0)&0x7);

byte g =

(byte)((clrPixelOriginal.G & ~0x7) |

(bytesOriginal[byteCount]>>3)&0x7);

byte b =

(byte)((clrPixelOriginal.B & ~0x3) |

(bytesOriginal[byteCount]>>6)&0x3);

byteCount++;

//set pixel to modified color

bitmapModified.SetPixel(

i, j, Color.FromArgb(r, g, b));

}

catch (Exception ex)

{

MessageBox.Show(

"Error hiding message." +

ex.Message);

}

finally

{

//show normal cursor

this.Cursor = Cursors.Arrow;

//repaint

Invalidate();

}

private void buttonExtractMessage_Click(

object sender, System.EventArgs e)

{

//get bytes of message from modified image

byte[] bytesExtracted = new byte [256+1];

try

{

//show wait cursor, can be time-consuming

this.Cursor = Cursors.WaitCursor;

//get bits 1, 2, 3 of byte from LSB red

//get bits 4, 5, 6 of byte from LSB green

//get bits 7 and 8 of byte from LSB blue

int byteCount = 0;

for (int i=0; i<bitmapModified.Width; i++)

{

for (int j=0; j<bitmapModified.Height; j++)

{

if (bytesExtracted.Length==byteCount)

return;

Color clrPixelModified =

bitmapModified.GetPixel(i, j);

byte bits123 =

(byte)((clrPixelModified.R&0x7)<<0);

byte bits456 = (

byte)((clrPixelModified.G&0x7)<<3);

byte bits78 = (

byte)((clrPixelModified.B&0x3)<<6);

bytesExtracted[byteCount] =

(byte)(bits78 |bits456 | bits123);

byteCount++;

}

catch (Exception ex)

{

MessageBox.Show(

"Error extracting message." +

ex.Message);

}

finally

{

//show normal cursor

this.Cursor = Cursors.Arrow;

//get number of bytes from start of array

int numberbytes = bytesExtracted[0];

//get remaining bytes in array into string

textBoxExtractedlMessage.Text =

Encoding.UTF8.GetString(

bytesExtracted,

numberbytes);

}

//shared private fields

private Bitmap bitmapOriginal;

private Bitmap bitmapModified;

}

转载于:https://www.cnblogs.com/ajaxren/archive/2007/04/23/724489.html