done

Crypto/src/ROT13.java

@@ -1,32 +1,70 @@
-import static java.lang.Character.isLowerCase;
-import static java.lang.Character.isUpperCase;
-import static java.lang.Character.toLowerCase;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 
 public class ROT13  {
+    String cyphered;
+    int diff;
 
     ROT13(Character cs, Character cf) {
+        this.diff = Math.abs(cs - cf);
     }
 
     ROT13() {
+        this.diff = 13;
     }
 
 
     public String crypt(String text) throws UnsupportedOperationException {
+        StringBuffer answer = new StringBuffer();
 
-        return "";
+        for(int i = 0; i < text.length(); i++){
+            if (!Character.isLetter(text.charAt(i))) {
+                answer.append(text.charAt(i));
+            } else if (Character.isUpperCase(text.charAt(i))) {
+                char ch = (char) (((int) text.charAt(i) + diff - 65) % 26 + 65);
+                answer.append(ch);
+            } else {
+                char ch = (char) (((int) text.charAt(i) + diff - 97) % 26 + 97);
+                answer.append(ch);
+            }
+        }
+
+        return answer.toString();
     }
 
     public String encrypt(String text) {
-        return text;
+        return crypt(text);
     }
 
     public String decrypt(String text) {
-        return text;
+        return crypt(text);
+    }
+
+    public String rotate(String s, Character c) {
+        int difference = (int) c - 65;
+        int i = difference % s.length();
+        return s.substring(i) + s.substring(0,i);
     }
 
-    public static String rotate(String s, Character c) {
+    public String fileString (File filePath) throws IOException {
+        return new String(Files.readAllBytes(Paths.get(String.valueOf(filePath))));
+    }
 
-        return "";
+    public File newFile(String original, String newFileName) {
+        File newFile = null;
+        try {
+            newFile = new File(newFileName);
+            FileWriter fileWriter = new FileWriter(newFile);
+            fileWriter.write(encrypt(fileString(new File(original))));
+            fileWriter.flush();
+            fileWriter.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return newFile;
     }
 
 }

Crypto/src/ROT13Test.java

@@ -1,4 +1,6 @@
 import org.junit.Test;
+import java.io.File;
+import java.io.IOException;
 
 import static org.junit.Assert.*;
 
@@ -12,8 +14,8 @@ public class ROT13Test {
         String s2 = "ABCDEF";
 
         // When
-        ROT13 cipher = new ROT13();
-        String actual = cipher.rotate(s1, 'A');
+        ROT13 cypher = new ROT13();
+        String actual = cypher.rotate(s1, 'A');
 
         // Then
         assertTrue(actual.equals(s2));
@@ -26,8 +28,8 @@ public class ROT13Test {
         String s2 = "DEFABC";
 
         // When
-        ROT13 cipher = new ROT13();
-        String actual = cipher.rotate(s1, 'D');
+        ROT13 cypher = new ROT13();
+        String actual = cypher.rotate(s1, 'D');
 
         // Then
         assertTrue(actual.equals(s2));
@@ -40,8 +42,8 @@ public class ROT13Test {
         String s2 = "NOPQRSTUVWXYZABCDEFGHIJKLM";
 
         // When
-        ROT13 cipher = new ROT13();
-        String actual = cipher.rotate(s1, 'N');
+        ROT13 cypher = new ROT13();
+        String actual = cypher.rotate(s1, 'N');
         System.out.println(s1);
         System.out.println(actual);
         // Then
@@ -51,7 +53,7 @@ public class ROT13Test {
     @Test
     public void cryptTest1() {
         // Given
-        ROT13 cipher = new ROT13('a', 'n');
+        ROT13 cypher = new ROT13('a', 'n');
 
         String Q1 = "Why did the chicken cross the road?";
         String A1 = "Jul qvq gur puvpxra pebff gur ebnq?";
@@ -60,14 +62,14 @@ public class ROT13Test {
         String A2 = "To get to the other side!";
 
         // When
-        String actual = cipher.encrypt(Q1);
+        String actual = cypher.encrypt(Q1);
         System.out.println(Q1);
         System.out.println(A1);
         // Then
         assertTrue(actual.equals(A1));
 
         // When
-        String actual2 = cipher.decrypt(Q2);
+        String actual2 = cypher.decrypt(Q2);
         System.out.println(Q2);
         System.out.println(A2);
         // Then
@@ -76,16 +78,38 @@ public class ROT13Test {
     @Test
     public void cryptTest2() {
         // Given
-        ROT13 cipher = new ROT13('a', 'n');
+        ROT13 cypher = new ROT13('a', 'n');
 
         String Q1 = "Why did the chicken cross the road?";
         System.out.println(Q1);
 
         // When
-        String actual = cipher.crypt(cipher.crypt(Q1));
+        String actual = cypher.crypt(cypher.crypt(Q1));
         System.out.println(actual);
         // Then
         assertTrue(actual.equals(Q1));
     }
 
+    @Test
+    public void hideNewFile() throws IOException {
+        //Given
+        ROT13 cypher = new ROT13();
+        String filePath = "/Users/ben/Labs/ZCW-SimpleCrypt0/sonnet18.txt";
+
+        File newFile = cypher.newFile(filePath, "sonnet18.enc");
+        String encryptedFile = cypher.fileString(newFile);
+        assertTrue(newFile.exists());
+    }
+
+    @Test
+    public void decryptNewFile() throws IOException {
+        ROT13 cypher = new ROT13();
+
+        String filePath = "/Users/ben/Labs/ZCW-SimpleCrypt0/sonnet18.enc";
+
+        File newFile = cypher.newFile(filePath, "sonnet18.dcr");
+        String encryptedFile = cypher.fileString(newFile);
+        assertTrue(newFile.exists());
+    }
+
 }

SimpleCrypt.iml

@@ -0,0 +1,17 @@
+<?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: junit:junit:4.12" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+  </component>
+</module>

pom.xml

@@ -1,12 +1,32 @@
-<?xml version="1.0" encoding="UTF-8"?>
+
 <project xmlns="http://maven.apache.org/POM/4.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+        <build>
+            <plugins>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <configuration>
+                        <source>1.8</source>
+                        <target>1.8</target>
+                    </configuration>
+                </plugin>
+            </plugins>
+        </build>
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>com.zipcodewilmington</groupId>
     <artifactId>SimpleCrypt</artifactId>
     <version>1.0-SNAPSHOT</version>
+        <dependencies>
+            <dependency>
+                <groupId>junit</groupId>
+                <artifactId>junit</artifactId>
+                <version>4.12</version>
+                <scope>compile</scope>
+            </dependency>
+        </dependencies>
 
 
 </project>