completed

Crypto/src/ROT13.java

@@ -1,32 +1,72 @@
-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 ciphered;
+    int rotation;
+
     ROT13(Character cs, Character cf) {
+        this.rotation = Math.abs(cs - cf);
     }
 
     ROT13() {
+        this.rotation = 13;
     }
 
 
     public String crypt(String text) throws UnsupportedOperationException {
 
-        return "";
+            StringBuilder sb = new StringBuilder();
+
+        for(int i = 0; i < text.length(); i++){
+            if(!Character.isLetter(text.charAt(i))){
+                sb.append(text.charAt(i));
+            } else if(Character.isUpperCase(text.charAt(i))){
+                char ch = (char) (((int) text.charAt(i) + rotation - 65) % 26 + 65);
+                sb.append(ch);
+            } else {
+                char ch = (char) (((int) text.charAt(i)+ rotation - 97) % 26 + 97);
+                sb.append(ch);
+            }
+        } return sb.toString();
     }
 
     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) {
+    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);
+    }
 
-        return "";
+    public String fileToString (File filePath) throws IOException {
+        return new String(Files.readAllBytes(Paths.get(String.valueOf(filePath))));
     }
 
+    public File newEncryptedFile(String original, String newFileName) {
+       File newFile = null;
+        try {
+            newFile = new File(newFileName);
+            FileWriter fileWriter = new FileWriter(newFile);
+            fileWriter.write(encrypt(fileToString(new File(original))));
+            fileWriter.flush();
+            fileWriter.close();
+            
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return newFile;
+    } 
 }

Crypto/src/ROT13Test.java

@@ -1,5 +1,8 @@
 import org.junit.Test;
 
+import java.io.File;
+import java.io.IOException;
+
 import static org.junit.Assert.*;
 
 public class ROT13Test {
@@ -61,6 +64,7 @@ public class ROT13Test {
 
         // When
         String actual = cipher.encrypt(Q1);
+        System.out.println(actual);
         System.out.println(Q1);
         System.out.println(A1);
         // Then
@@ -68,6 +72,7 @@ public class ROT13Test {
 
         // When
         String actual2 = cipher.decrypt(Q2);
+        System.out.println(actual2);
         System.out.println(Q2);
         System.out.println(A2);
         // Then
@@ -88,4 +93,26 @@ public class ROT13Test {
         assertTrue(actual.equals(Q1));
     }
 
+    @Test
+    public void newEncryptedFile() throws IOException {
+        //Given
+        ROT13 cipher = new ROT13();
+
+        String filePath = "/Users/davidT/Labs/ZCW-SimpleCrypt0/sonnet18.txt";
+
+        File newFile = cipher.newEncryptedFile(filePath, "sonnet18.enc");
+        String encyrptedFile = cipher.fileToString(newFile);
+        assertTrue(newFile.exists());
+    }
+
+    @Test
+    public void decryptTheNewFile() throws IOException {
+        ROT13 cipher = new ROT13();
+
+        String filePath = "/Users/davidT/Labs/ZCW-SimpleCrypt0/sonnet18.enc";
+
+        File newFile = cipher.newEncryptedFile(filePath, "sonnet18.dcr");
+        String encyrptedFile = cipher.fileToString(newFile);
+        assertTrue(newFile.exists());
+    }
 }

SimpleCrypt.iml

@@ -0,0 +1,15 @@
+<?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" />
+  </component>
+</module>

pom.xml

@@ -2,11 +2,32 @@
 <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>
+

sonnet18.dcr

@@ -0,0 +1,14 @@
+Shall I compare thee to a summer’s day?
+Thou art more lovely and more temperate:
+Rough winds do shake the darling buds of May,
+And summer’s lease hath all too short a date;
+Sometime too hot the eye of heaven shines,
+And often is his gold complexion dimm'd;
+And every fair from fair sometime declines,
+By chance or nature’s changing course untrimm'd;
+But thy eternal summer shall not fade,
+Nor lose possession of that fair thou ow’st;
+Nor shall death brag thou wander’st in his shade,
+When in eternal lines to time thou grow’st:
+   So long as men can breathe or eyes can see,
+   So long lives this, and this gives life to thee.

sonnet18.enc

@@ -0,0 +1,14 @@
+Funyy V pbzcner gurr gb n fhzzre’f qnl?
+Gubh neg zber ybiryl naq zber grzcrengr:
+Ebhtu jvaqf qb funxr gur qneyvat ohqf bs Znl,
+Naq fhzzre’f yrnfr ungu nyy gbb fubeg n qngr;
+Fbzrgvzr gbb ubg gur rlr bs urnira fuvarf,
+Naq bsgra vf uvf tbyq pbzcyrkvba qvzz'q;
+Naq rirel snve sebz snve fbzrgvzr qrpyvarf,
+Ol punapr be angher’f punatvat pbhefr hagevzz'q;
+Ohg gul rgreany fhzzre 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 gvzr gubh tebj’fg:
+   Fb ybat nf zra pna oerngur be rlrf pna frr,
+   Fb ybat yvirf guvf, naq guvf tvirf yvsr gb gurr.