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Merged basic ui and key generation

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Added generate, crypt and decrypt function to ui
This commit is contained in:
Christian Loch 2020-05-07 18:49:41 +02:00 committed by Loch Christian (uib05376)
commit 332ccf142e
3 changed files with 106 additions and 11 deletions
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27
src/MainWindow.form
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@ -2,26 +2,27 @@
<form xmlns="http://www.intellij.com/uidesigner/form/" version="1" bind-to-class="MainWindow">
<grid id="cbd77" binding="contentPane" layout-manager="BorderLayout" hgap="0" vgap="0">
<constraints>
<xy x="48" y="54" width="720" height="500"/>
<xy x="48" y="54" width="962" height="500"/>
</constraints>
<properties/>
<border type="empty">
<size top="10" left="10" bottom="10" right="10"/>
</border>
<children>
<grid id="12135" layout-manager="GridLayoutManager" row-count="9" column-count="3" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
<grid id="12135" layout-manager="GridLayoutManager" row-count="9" column-count="4" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
<margin top="0" left="0" bottom="0" right="0"/>
<constraints border-constraint="Center"/>
<properties/>
<border type="none"/>
<children>
<component id="adfc7" class="javax.swing.JTextArea" binding="publicKeytextArea">
<component id="adfc7" class="javax.swing.JTextArea" binding="publicKeyTextArea">
<constraints>
<grid row="3" column="0" row-span="1" col-span="1" vsize-policy="6" hsize-policy="6" anchor="0" fill="3" indent="0" use-parent-layout="false">
<preferred-size width="150" height="50"/>
</grid>
</constraints>
<properties>
<lineWrap value="true"/>
<text value=""/>
</properties>
</component>
@ -31,7 +32,9 @@
<preferred-size width="150" height="50"/>
</grid>
</constraints>
<properties/>
<properties>
<lineWrap value="true"/>
</properties>
</component>
<component id="17322" class="javax.swing.JLabel">
<constraints>
@ -164,6 +167,22 @@
<text value=""/>
</properties>
</component>
<component id="30d6d" class="javax.swing.JLabel">
<constraints>
<grid row="2" column="3" row-span="1" col-span="1" vsize-policy="0" hsize-policy="0" anchor="8" fill="0" indent="0" use-parent-layout="false"/>
</constraints>
<properties>
<text value="RSA module:"/>
</properties>
</component>
<component id="9cd2f" class="javax.swing.JTextArea" binding="moduleTextArea">
<constraints>
<grid row="3" column="3" row-span="1" col-span="1" vsize-policy="6" hsize-policy="6" anchor="0" fill="3" indent="0" use-parent-layout="false">
<preferred-size width="150" height="50"/>
</grid>
</constraints>
<properties/>
</component>
</children>
</grid>
</children>

26
src/MainWindow.java
View File

@ -3,10 +3,11 @@ import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.math.BigInteger;
public class MainWindow extends JDialog implements ChangeListener, ActionListener {
private JPanel contentPane;
private JTextArea publicKeytextArea;
private JTextArea publicKeyTextArea;
private JTextArea privateKeyTextArea;
private JTextField plainNumber;
private JTextField encryptedNumber2;
@ -17,7 +18,9 @@ public class MainWindow extends JDialog implements ChangeListener, ActionListene
private JTextField decryptedNumber;
private JSlider keylength;
private JLabel keylengthLabel;
private JTextArea moduleTextArea;
private JButton buttonOK;
private RSA rsa;
public MainWindow() {
setContentPane(contentPane);
@ -48,14 +51,29 @@ public class MainWindow extends JDialog implements ChangeListener, ActionListene
public void actionPerformed(ActionEvent e) {
JButton source = (JButton) e.getSource();
if (source == this.cryptButton) {
System.out.println("crypt button clicked!");
BigInteger message = new BigInteger(this.plainNumber.getText());
BigInteger key = new BigInteger(this.publicKeyTextArea.getText());
BigInteger module = new BigInteger(this.moduleTextArea.getText());
String encrypted = RSA.cipher(message, key, module).toString();
this.encryptedNumber.setText(encrypted);
} else if (source == this.decryptButton) {
System.out.println("decrypt button clicked!");
BigInteger encryNumber = new BigInteger(this.encryptedNumber2.getText());
BigInteger key = new BigInteger(this.privateKeyTextArea.getText());
BigInteger module = new BigInteger(this.moduleTextArea.getText());
String decrypted = RSA.cipher(encryNumber, key, module).toString();
this.decryptedNumber.setText(decrypted);
} else if (source == this.generateKeysButton) {
System.out.println("Generate button clicked!");
this.rsa = new RSA(this.keylength.getValue());
this.rsa.createKeys();
this.publicKeyTextArea.setText(this.rsa.getPublicKey()+"");
this.privateKeyTextArea.setText(this.rsa.getPrivateKey()+"");
this.moduleTextArea.setText(this.rsa.getRSAModule()+"");
}
}
public static void main(String[] args) {
MainWindow dialog = new MainWindow();
dialog.pack();

66
src/RSA.java
View File

@ -1,4 +1,3 @@
public class RSA {
// p = 5, q = 11
// RSA-Modul N = p * q = 55
// Phi(N) = Phi(p)*Phi(q) | weil eigenschaft eulersche phi funktion und p,q teilerfremd
@ -19,10 +18,69 @@ public class RSA {
// ----
// Entschlüsseln
// m = c^d (mod N) => 52^27 (mod 55) = 13 = m
public RSA() {
import java.math.BigInteger;
public class RSA {
private int bitLength;
private BigInteger p;
private BigInteger q;
private BigInteger n;
private BigInteger phiP;
private BigInteger phiQ;
private BigInteger phiN;
private BigInteger e;
private BigInteger d;
public RSA (int bitLength) {
this.bitLength = bitLength;
this.p = Prime.generate(bitLength);
this.q = Prime.generate(bitLength);
this.n = p.multiply(q);
this.phiP = p.subtract(BigInteger.ONE);
this.phiQ = q.subtract(BigInteger.ONE);
this.phiN = phiP.multiply(phiQ);
}
private void findPublicKey () {
BigInteger check;
do {
this.e = Prime.generate(this.bitLength*2/3);
check = this.e.gcd(phiN);
} while (!check.equals(BigInteger.ONE));
}
private void findPrivateKey () {
this.d = e.modInverse(phiN);
}
private void endKeyCreation () {
this.p = BigInteger.ZERO;
this.q = BigInteger.ZERO;
this.phiP = BigInteger.ZERO;
this.phiQ = BigInteger.ZERO;
this.phiN = BigInteger.ZERO;
}
public void createKeys() {
this.findPublicKey();
this.findPrivateKey();
this.endKeyCreation();
}
public BigInteger getPublicKey () {
return e;
}
public BigInteger getPrivateKey () {
return d;
}
public BigInteger getRSAModule() {
return n;
}
static BigInteger cipher (BigInteger message, BigInteger key, BigInteger module) {
return message.modPow(key, module);
}
}