chore: various refactorings + improved UX; decryption WIP
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parent
49e996d602
commit
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GPG Key ID:
6391444A736EEE7E
109
Form1.Designer.cs
generated
109
Form1.Designer.cs
generated
@ -40,6 +40,15 @@
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this.textBox4 = new System.Windows.Forms.TextBox();
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this.label4 = new System.Windows.Forms.Label();
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this.label5 = new System.Windows.Forms.Label();
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this.textBox5 = new System.Windows.Forms.TextBox();
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this.label6 = new System.Windows.Forms.Label();
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this.label7 = new System.Windows.Forms.Label();
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this.label8 = new System.Windows.Forms.Label();
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this.textBox7 = new System.Windows.Forms.TextBox();
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this.label9 = new System.Windows.Forms.Label();
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this.label10 = new System.Windows.Forms.Label();
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this.textBox6 = new System.Windows.Forms.TextBox();
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this.button5 = new System.Windows.Forms.Button();
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this.SuspendLayout();
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//
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// button1
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@ -81,6 +90,7 @@
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//
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// textBox2
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//
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this.textBox2.Enabled = false;
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this.textBox2.Location = new System.Drawing.Point(105, 137);
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this.textBox2.Name = "textBox2";
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this.textBox2.ReadOnly = true;
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@ -147,11 +157,99 @@
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this.label5.TabIndex = 4;
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this.label5.Text = "cryptmessage";
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//
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// textBox5
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//
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this.textBox5.Location = new System.Drawing.Point(707, 108);
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this.textBox5.Name = "textBox5";
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this.textBox5.Size = new System.Drawing.Size(404, 23);
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this.textBox5.TabIndex = 6;
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//
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// label6
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//
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this.label6.AutoSize = true;
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this.label6.Location = new System.Drawing.Point(105, 90);
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this.label6.Name = "label6";
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this.label6.Size = new System.Drawing.Size(226, 15);
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this.label6.TabIndex = 7;
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this.label6.Text = "replacing nasty characters in the message";
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this.label6.Visible = false;
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//
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// label7
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//
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this.label7.AutoSize = true;
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this.label7.Font = new System.Drawing.Font("Segoe UI", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
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this.label7.Location = new System.Drawing.Point(105, 64);
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this.label7.Name = "label7";
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this.label7.Size = new System.Drawing.Size(413, 19);
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this.label7.TabIndex = 8;
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this.label7.Text = "Allowed characters: ABCDEFGHIJKLMNOPQRSTUVWXYZ <space>";
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//
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// label8
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//
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this.label8.AutoSize = true;
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this.label8.Location = new System.Drawing.Point(621, 111);
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this.label8.Name = "label8";
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this.label8.Size = new System.Drawing.Size(80, 15);
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this.label8.TabIndex = 9;
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this.label8.Text = "cryptmessage";
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//
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// textBox7
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//
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this.textBox7.Location = new System.Drawing.Point(707, 169);
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this.textBox7.Name = "textBox7";
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this.textBox7.Size = new System.Drawing.Size(404, 23);
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this.textBox7.TabIndex = 11;
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//
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// label9
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//
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this.label9.AutoSize = true;
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this.label9.Location = new System.Drawing.Point(676, 172);
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this.label9.Name = "label9";
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this.label9.Size = new System.Drawing.Size(25, 15);
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this.label9.TabIndex = 12;
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this.label9.Text = "key";
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//
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// label10
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//
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this.label10.AutoSize = true;
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this.label10.Location = new System.Drawing.Point(648, 252);
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this.label10.Name = "label10";
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this.label10.Size = new System.Drawing.Size(53, 15);
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this.label10.TabIndex = 16;
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this.label10.Text = "message";
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//
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// textBox6
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//
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this.textBox6.Location = new System.Drawing.Point(707, 249);
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this.textBox6.Name = "textBox6";
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this.textBox6.ReadOnly = true;
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this.textBox6.Size = new System.Drawing.Size(404, 23);
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this.textBox6.TabIndex = 15;
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//
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// button5
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//
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this.button5.Location = new System.Drawing.Point(707, 278);
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this.button5.Name = "button5";
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this.button5.Size = new System.Drawing.Size(75, 23);
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this.button5.TabIndex = 14;
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this.button5.Text = "decrypt";
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this.button5.UseVisualStyleBackColor = true;
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this.button5.Click += new System.EventHandler(this.button5_Click);
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//
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// Form1
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//
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this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
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this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
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this.ClientSize = new System.Drawing.Size(800, 450);
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this.ClientSize = new System.Drawing.Size(1134, 450);
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this.Controls.Add(this.label10);
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this.Controls.Add(this.textBox6);
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this.Controls.Add(this.button5);
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this.Controls.Add(this.label9);
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this.Controls.Add(this.textBox7);
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this.Controls.Add(this.label8);
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this.Controls.Add(this.label7);
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this.Controls.Add(this.label6);
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this.Controls.Add(this.textBox5);
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this.Controls.Add(this.label5);
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this.Controls.Add(this.label4);
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this.Controls.Add(this.textBox4);
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@ -185,5 +283,14 @@
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private System.Windows.Forms.TextBox textBox4;
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private System.Windows.Forms.Label label4;
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private System.Windows.Forms.Label label5;
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private System.Windows.Forms.TextBox textBox5;
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private System.Windows.Forms.Label label6;
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private System.Windows.Forms.Label label7;
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private System.Windows.Forms.Label label8;
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private System.Windows.Forms.TextBox textBox7;
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private System.Windows.Forms.Label label9;
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private System.Windows.Forms.Label label10;
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private System.Windows.Forms.TextBox textBox6;
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private System.Windows.Forms.Button button5;
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}
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}
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130
Form1.cs
130
Form1.cs
@ -42,6 +42,12 @@ namespace KRY_0x05_netcore
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otp = null;
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}
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void empty_message_warning()
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{
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MessageBox.Show("The key is to be of the exact same length as the message.\nNo message means no key length to incur.", "Empty message yo");
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return;
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}
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public byte[] gimme_bytes(int howmuch)
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{
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RNGCryptoServiceProvider rnd = new RNGCryptoServiceProvider();
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@ -52,27 +58,29 @@ namespace KRY_0x05_netcore
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void gen_nice_key()
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{
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textBox2.Text = "";
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textBox3.Text = "";
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byte[] random = new byte[1337];
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if (textBox1.Text == "")
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{
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MessageBox.Show("empty message yo", "just so you know");
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return;
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}
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else if (textBox1.Text == "")
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{
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MessageBox.Show("kind of forgot about the key, didn't you", "heeey");
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empty_message_warning();
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textBox2.Text = "";
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return;
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}
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Match match = Regex.Match(textBox1.Text, @"\d|\s+");
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if (match.Success)
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{
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label6.Visible = true;
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}
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else
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{
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label6.Visible = false;
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}
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string m = textBox1.Text;
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m = m.ToUpper();
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m = Regex.Replace(m, @" ", "MEZERABRO");
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m = Regex.Replace(m, @"\d|\s+", "");
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textBox2.Text = m;
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if (match.Success){MessageBox.Show("nasty message", "replacing forbidden stuff");}
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byte[] random = new byte[1337];
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int mlength = textBox2.Text.Length;
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otp = new int[mlength];
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for (int i = 0; i < mlength; i++)
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@ -81,12 +89,79 @@ namespace KRY_0x05_netcore
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random = gimme_bytes(random.Length);
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otp[i] = Math.Abs(BitConverter.ToInt32(random, 0) % 26);
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}
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textBox3.Text = "";
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for (int i = 0; i < otp.Length; i++)
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{
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textBox3.Text += alphabet[otp[i]];
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}
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}
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void encrypt()
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{
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if (textBox1.Text == "")
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{
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empty_message_warning();
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return;
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}
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else if (otp == null)
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{
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MessageBox.Show("Please regenerate the key");
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return;
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}
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MessageBox.Show("The key **WILL DISAPPEAR** the instant you click OK and you will never see it here again.\nMake sure you write it down (or that you remember it) if you're interested in ever decrypting your precious message.", "WARNING", MessageBoxButtons.OK, MessageBoxIcon.Warning);
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string m = textBox2.Text;
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int[] num_val = new int[m.Length];
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for (int i = 0; i < m.Length; i++)
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{
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string a = m.Substring(i, 1);
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for (int j = 0; j < alphabet.Length; j++)
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{
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if (a == Convert.ToString(alphabet[j]))
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{
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num_val[i] = j;
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}
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}
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}
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string cryptmessage = "";
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for (int i = 0; i < otp.Length; i++)
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{
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cryptmessage += alphabet[(num_val[i] + otp[i]) % 26];
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}
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textBox3.Text = "";
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clear_otp();
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textBox4.Text = cryptmessage;
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}
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void check_and_replace_d_key()
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{
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string k = textBox7.Text;
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Match match = Regex.Match(k, @"\d|\s+");
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if (match.Success)
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{
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MessageBox.Show("Invalid characters in the key, not even attempting decryption.\nOnly the letters of the English alphabet are allowed for the key.","Error");
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return;
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}
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k = k.ToUpper();
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k = Regex.Replace(k, @"MEZERABRO", " ");
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return;
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}
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void decrypt()
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{
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if (textBox5.Text == "")
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{
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MessageBox.Show("Nothing to decrypt", "Error");
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return;
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}
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else if (textBox7.Text == "")
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{
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MessageBox.Show("No key provided","Error");
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return;
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}
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check_and_replace_d_key();
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return;
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}
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private void button1_Click(object sender, EventArgs e)
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@ -102,34 +177,13 @@ namespace KRY_0x05_netcore
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private void button3_Click(object sender, EventArgs e)
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{
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/* encrypt */
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if (otp == null)
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{
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MessageBox.Show("Please regenerate the key");
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return;
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}
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encrypt();
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}
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MessageBox.Show("The key **WILL DISAPPEAR** the instant you click OK and you will never see it here again.\nMake sure you write it down (or that you remember it) if you're interested in ever decrypting your precious message.","WARNING",MessageBoxButtons.OK,MessageBoxIcon.Warning);
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string m = textBox2.Text;
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int[] num_val = new int[m.Length];
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for (int i = 0; i < m.Length; i++)
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{
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string a = m.Substring(i, 1);
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for (int j = 0; j < alphabet.Length; j++)
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{
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if (a == Convert.ToString(alphabet[j])) ;
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{
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num_val[i] = j;
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}
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}
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}
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string cryptmessage = "";
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for (int i = 0; i < otp.Length; i++)
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{
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cryptmessage += alphabet[(num_val[i] + otp[i]) % 26];
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}
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textBox4.Text = cryptmessage;
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textBox3.Text = "";
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clear_otp();
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private void button5_Click(object sender, EventArgs e)
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{
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/* decrypt */
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decrypt();
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}
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}
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}
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