RSA

.gitignore

+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

AESCTR/src/AES.java

-import it.uniupo.byteLib.Tools;
-
 import javax.crypto.*;
-import javax.crypto.spec.SecretKeySpec;
-import java.security.InvalidKeyException;
-import java.security.NoSuchAlgorithmException;
+import java.security.Key;
 
 public class AES {
-    public byte[] ctr(byte[] pt) {
-        Cipher c;
+    public byte[] encryptCtr(Key key, byte[] pt) {
         try {
+            Cipher c;
             c = Cipher.getInstance("AES/CTR/NoPadding");
-        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
-            throw new RuntimeException(e);
-        }
-        KeyGenerator keyGenerator;
-        try {
-            keyGenerator = KeyGenerator.getInstance("AES");
-        } catch (NoSuchAlgorithmException e) {
-            throw new RuntimeException(e);
-        }
-        var key = keyGenerator.generateKey();
-        Tools.writeByteFlow(key.getEncoded(), "key");
-        try {
             c.init(Cipher.ENCRYPT_MODE, key);
-        } catch (InvalidKeyException e) {
+            return c.doFinal(pt);
+        } catch (Exception e) {
             throw new RuntimeException(e);
         }
+    }
+
+    public byte[] decryptCtr(Key key, byte[] ct) {
         try {
-            c.doFinal(pt);
-        } catch (IllegalBlockSizeException | BadPaddingException e) {
+            Cipher c;
+            c = Cipher.getInstance("AES/CTR/NoPadding");
+            c.init(Cipher.DECRYPT_MODE, key);
+            return c.doFinal(ct);
+        } catch (Exception e) {
             throw new RuntimeException(e);
         }
     }

RSA/.gitignore

+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file

RSA/.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml

RSA/.idea/codeStyles/Project.xml

+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <JetCodeStyleSettings>
+      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
+    </JetCodeStyleSettings>
+    <codeStyleSettings language="kotlin">
+      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
+    </codeStyleSettings>
+  </code_scheme>
+</component>
\ No newline at end of file

RSA/.idea/codeStyles/codeStyleConfig.xml

+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="USE_PER_PROJECT_SETTINGS" value="true" />
+  </state>
+</component>
\ No newline at end of file

RSA/.idea/inspectionProfiles/Project_Default.xml

+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="ReplaceUntilWithRangeUntil" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+  </profile>
+</component>
\ No newline at end of file

RSA/.idea/kotlinc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Kotlin2JvmCompilerArguments">
+    <option name="jvmTarget" value="1.8" />
+  </component>
+  <component name="KotlinCommonCompilerArguments">
+    <option name="apiVersion" value="2.0" />
+    <option name="languageVersion" value="2.0" />
+  </component>
+</project>
\ No newline at end of file

RSA/.idea/libraries/KotlinJavaRuntime.xml

+<component name="libraryTable">
+  <library name="KotlinJavaRuntime" type="repository">
+    <properties maven-id="org.jetbrains.kotlin:kotlin-stdlib:2.0.0" />
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/2.0.0/kotlin-stdlib-2.0.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/annotations/13.0/annotations-13.0.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/2.0.0/kotlin-stdlib-2.0.0-javadoc.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/annotations/13.0/annotations-13.0-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/2.0.0/kotlin-stdlib-2.0.0-sources.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/annotations/13.0/annotations-13.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file

RSA/.idea/libraries/byteLib.xml

+<component name="libraryTable">
+  <library name="byteLib">
+    <CLASSES>
+      <root url="jar://$PROJECT_DIR$/../byteLib.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$PROJECT_DIR$/../byteLib.jar!/doc" />
+    </JAVADOC>
+    <SOURCES />
+  </library>
+</component>
\ No newline at end of file

RSA/.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

RSA/.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/RSA.iml" filepath="$PROJECT_DIR$/RSA.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

RSA/.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

RSA/RSA.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/testResources" type="java-test-resource" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="KotlinJavaRuntime" level="project" />
+    <orderEntry type="library" name="byteLib" level="project" />
+  </component>
+</module>
\ No newline at end of file

RSA/src/Rsa.kt

+import java.security.Key
+import javax.crypto.Cipher
+
+class Rsa {
+    fun encrypt(key: Key, pt: ByteArray): ByteArray {
+        val c = Cipher.getInstance("RSA");
+        c.init(Cipher.ENCRYPT_MODE, key)
+        return c.doFinal(pt)
+    }
+
+    fun decrypt(key: Key, ct: ByteArray): ByteArray {
+        val c = Cipher.getInstance("RSA");
+        c.init(Cipher.DECRYPT_MODE, key)
+        return c.doFinal(ct)
+    }
+}
\ No newline at end of file