Finished lab

Crypto/src/Main.java

@@ -0,0 +1,18 @@
+import org.apache.commons.io.IOUtils;
+
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+
+public class Main {
+
+    public static void main(String[] args) throws IOException {
+        InputStream in = new FileInputStream("sonnet18.txt");
+        String body = IOUtils.toString(in, StandardCharsets.UTF_8.name());
+        System.out.println(body);
+        PrintStream out = new PrintStream(new FileOutputStream("sonnet18.enc"));
+        ROT13 rot13 = new ROT13();
+        String output = rot13.encrypt(body);
+        out.append(output);
+        out.flush();
+    }
+}

Crypto/src/ROT13.java

@@ -3,30 +3,77 @@
 import static java.lang.Character.toLowerCase;
 
 public class ROT13  {
+    private Character cs;
+    private Character cf;
 
     ROT13(Character cs, Character cf) {
+        this.cs = cs;
+        this.cf = cf;
     }
 
     ROT13() {
+        this.cs = 'a';
+        this.cf = 'a' + 13;
     }
 
 
     public String crypt(String text) throws UnsupportedOperationException {
+        String crypted = "";
+        for(int i = 0; i<text.length(); i++){
+            char textChar = text.charAt(i);
+            int shiftDifferences = 13;
+            int differenceFromLastChar = 0;
+            if(textChar >= 'a' && textChar <= 'z'){
+                differenceFromLastChar = 'z'-textChar;
+                if(differenceFromLastChar > shiftDifferences){
+                    textChar += shiftDifferences;
+                }
+                else
+                {
+                    textChar = 'a';
+                    textChar +=(shiftDifferences - differenceFromLastChar-1);
+                }
+            }
+            else if(textChar >= 'A'&& textChar <= 'Z'){
+                differenceFromLastChar = 'Z'-textChar;
+                if(differenceFromLastChar > shiftDifferences){
+                    textChar += shiftDifferences;
+                }else {
+                    textChar = 'A';
+                    textChar +=(shiftDifferences-differenceFromLastChar-1);
+                }
+            }
+            crypted += textChar;
+        }
 
-        return "";
+        return crypted;
     }
 
     public String encrypt(String text) {
-        return text;
+        return crypt(text);
     }
 
     public String decrypt(String text) {
-        return text;
+        return crypt(text);
     }
 
     public static String rotate(String s, Character c) {
+        char lastChar = s.charAt(s.length()-1);
+        String rotated = "";
+        for(int i = 0; i< s.length();i++){
+            char textChar = s.charAt(i);
+            int shiftDifferences = c - 'A';
+            int differenceFromLastChar = lastChar - textChar;
+            if(differenceFromLastChar >= shiftDifferences){
 
-        return "";
+                textChar += shiftDifferences;
+            }else {
+                textChar = 'A';
+                textChar += (shiftDifferences -differenceFromLastChar-1);
+            }
+            rotated +=textChar;
+        }
+        return rotated;
     }
 
 }

SimpleCrypt.iml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/Crypto/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: commons-io:commons-io:2.5" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.13.1" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+  </component>
+</module>

pom.xml

@@ -7,6 +7,23 @@
     <groupId>com.zipcodewilmington</groupId>
     <artifactId>SimpleCrypt</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>2.5</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13.1</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
 
+    <properties>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <maven.compiler.source>1.8</maven.compiler.source>
+    </properties>
 
 </project>

sonnet18.enc

@@ -0,0 +1,14 @@
+Funyy V pb`cner gurr gb n fh``re’f qnl?
+Gubh neg `ber ybiryl naq `ber gr`crengr:
+Ebhtu jvaqf qb funxr gur qneyvat ohqf bs @nl,
+Naq fh``re’f yrnfr ungu nyy gbb fubeg n qngr;
+Fb`rgv`r gbb ubg gur rlr bs urnira fuvarf,
+Naq bsgra vf uvf tbyq pb`cyrkvba qv``'q;
+Naq rirel snve seb` snve fb`rgv`r qrpyvarf,
+Ol punapr be angher’f punatvat pbhefr hagev``'q;
+Ohg gul rgreany fh``re funyy abg snqr,
+Abe ybfr cbffrffvba bs gung snve gubh bj’fg;
+Abe funyy qrngu oent gubh jnaqre’fg va uvf funqr,
+Jura va rgreany yvarf gb gv`r gubh tebj’fg:
+   Fb ybat nf `ra pna oerngur be rlrf pna frr,
+   Fb ybat yvirf guvf, naq guvf tvirf yvsr gb gurr.