Browse Source

file read and writes

Jared Norris 6 years ago
parent
commit
47ffb00b0f
3 changed files with 130 additions and 7 deletions
  1. 58
    7
      Crypto/src/ROT13.java
  2. 58
    0
      Crypto/src/ROT13Test.java
  3. 14
    0
      sonnet18.enc

+ 58
- 7
Crypto/src/ROT13.java View File

@@ -1,16 +1,26 @@
1
+import java.io.IOException;
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+import java.nio.file.*;
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+import java.util.*;
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+
1 5
 public class ROT13  {
2 6
     private String cryptKey;
3 7
     private String alphabet = "abcdefghijklmnopqrstuvwxyz";
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+    private String sonnet = "/Users/jaredn/Labs/week5/ZCW-SimpleCrypt0/sonnet18.txt";
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+    private String cryptSonnet = "/Users/jaredn/Labs/week5/ZCW-SimpleCrypt0/sonnet18.enc";
4 10
 
5 11
 
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     ROT13(Character cs, Character cf) {
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-        int index = Math.abs((int)cs - (int)cf);
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-        cryptKey = rotate(alphabet, alphabet.charAt(index));
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+        cryptKey = rotate(alphabet, alphabet.charAt(Math.abs((int)cs - (int)cf)));
9 14
     }
10 15
 
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     ROT13(){ cryptKey = rotate(alphabet, 'n'); }
12 17
 
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     public String crypt(String text) throws UnsupportedOperationException {
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+        return encrypt(text);
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+    }
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+
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+    @SuppressWarnings("Duplicates")
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+    public String encrypt(String text) {
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         StringBuilder result = new StringBuilder();
15 25
 
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         for(Character c : text.toCharArray()) {
@@ -25,15 +35,56 @@ public class ROT13  {
25 35
         return result.toString();
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     }
27 37
 
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-    public String encrypt(String text) {
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-        return crypt(text);
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-    }
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-
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+    @SuppressWarnings("Duplicates")
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     public String decrypt(String text) {
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-        return crypt(text);
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+        StringBuilder result = new StringBuilder();
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+
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+        for(Character c : text.toCharArray()) {
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+            if (Character.isLetter(c)) {
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+                if (Character.isUpperCase(c)) {
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+                    result.append(Character.toUpperCase(alphabet.charAt(cryptKey.indexOf(Character.toLowerCase(c)))));
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+                }
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+                else result.append(alphabet.charAt(cryptKey.indexOf(c)));
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+            }
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+            else result.append(c);
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+        }
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+        return result.toString();
34 52
     }
35 53
 
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     public static String rotate(String s, Character c) {
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         return s.substring(s.indexOf(c)) + s.substring(0, s.indexOf(c));
38 56
     }
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+
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+    public void encryptSonnet() throws IOException {
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+        Files.write(Paths.get(cryptSonnet), encryptFile(sonnet).getBytes());
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+    }
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+
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+    public String decryptSonnet() {
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+        return decryptFile(cryptSonnet);
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+    }
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+
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+    public String encryptFile(String filePath) {
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+        try {
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+            return encrypt(parseFile(filePath));
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+        } catch (IOException e) {
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+            System.out.println(e.getMessage());
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+        }
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+        return null;
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+    }
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+
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+    public String decryptFile(String encryptedFilePath) {
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+        try {
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+            return decrypt(parseFile(encryptedFilePath));
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+        } catch (IOException e) {
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+            System.out.println(e.getMessage());
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+        }
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+        return null;
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+    }
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+
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+    public String parseFile(String filePath) throws IOException {
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+        List<String> content = Files.readAllLines(Paths.get(filePath));
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+        StringBuilder result = new StringBuilder();
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+        content.forEach(e -> result.append(e).append("\n"));
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+        return result.toString();
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+    }
39 90
 }

+ 58
- 0
Crypto/src/ROT13Test.java View File

@@ -1,6 +1,8 @@
1 1
 import static org.junit.jupiter.api.Assertions.*;
2 2
 import org.junit.jupiter.api.Test;
3 3
 
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+import java.io.IOException;
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+
4 6
 public class ROT13Test {
5 7
 
6 8
 
@@ -87,4 +89,60 @@ public class ROT13Test {
87 89
         assertTrue(actual.equals(Q1));
88 90
     }
89 91
 
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+    //-------------------------------------------------------------------
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+
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+    @Test
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+    public void decryptTest1() {
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+        ROT13 x = new ROT13('a', 'd');
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+
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+        String expected = "this is a test string";
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+        String actual = x.decrypt(x.encrypt(expected));
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+
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+        assertEquals(expected, actual);
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+    }
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+    @Test
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+    public void decryptTest2() {
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+        ROT13 x = new ROT13('a', 'z');
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+
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+        String expected = "TeStz   AAaarreE Fu!n";
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+        String actual = x.decrypt(x.encrypt(expected));
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+
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+        assertEquals(expected, actual);
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+    }
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+    @Test
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+    public void parseFileTest() {
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+        ROT13 x = new ROT13();
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+        String actual = "";
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+
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+        try {
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+            actual = x.parseFile("/Users/jaredn/Labs/week5/ZCW-SimpleCrypt0/sonnet18.txt");
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+        } catch (IOException e) {
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+            System.out.println(e.getMessage());
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+        }
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+
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+        assertNotNull(actual);
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+
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+    }
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+    @Test
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+    public void encryptFileTest() {
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+        ROT13 x = new ROT13();
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+        String actual = x.encryptFile("/Users/jaredn/Labs/week5/ZCW-SimpleCrypt0/sonnet18.txt");
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+
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+        assertNotNull(actual);
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+    }
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+    @Test
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+    public void decryptFileTest() {
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+        ROT13 x = new ROT13();
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+        String expected = null;
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+        try {
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+            x.encryptSonnet();
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+            expected = x.parseFile("/Users/jaredn/Labs/week5/ZCW-SimpleCrypt0/sonnet18.txt");
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+        } catch (IOException e) {
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+            System.out.println(e.getMessage());
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+        }
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+        String actual = x.decryptSonnet();
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+
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+        assertEquals(expected, actual);
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+    }
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+
90 148
 }

+ 14
- 0
sonnet18.enc View File

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