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Update ColumnarTranspositionCipher.java

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khalil2535
2018-04-14 23:15:31 +03:00
parent e5e6fc154d
commit cdff8a2e2e
1 changed files with 35 additions and 10 deletions
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45
ciphers/ColumnarTranspositionCipher.java
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@ -10,7 +10,8 @@ public class ColumnarTranspositionCipher {
private static String keyword; private static String keyword;
private static Object[][] table; private static Object[][] table;
private static String abecedarium; private static String abecedarium;
public static final String ABECEDARIUM = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789,.;:-@"; public static final String ABECEDARIUM = "abcdefghijklmnopqrstuvwxyzABCDEFG"
+ "HIJKLMNOPQRSTUVWXYZ0123456789,.;:-@";
private static final String ENCRYPTION_FIELD = "≈"; private static final String ENCRYPTION_FIELD = "≈";
private static final char ENCRYPTION_FIELD_CHAR = '≈'; private static final char ENCRYPTION_FIELD_CHAR = '≈';
@ -46,7 +47,8 @@ public class ColumnarTranspositionCipher {
* @return a String with the word encrypted by the Columnar Transposition * @return a String with the word encrypted by the Columnar Transposition
* Cipher Rule * Cipher Rule
*/ */
public static String encrpyter(String word, String keyword, String abecedarium) { public static String encrpyter(String word, String keyword,
String abecedarium) {
ColumnarTranspositionCipher.keyword = keyword; ColumnarTranspositionCipher.keyword = keyword;
if (abecedarium != null) { if (abecedarium != null) {
ColumnarTranspositionCipher.abecedarium = abecedarium; ColumnarTranspositionCipher.abecedarium = abecedarium;
@ -122,18 +124,24 @@ public class ColumnarTranspositionCipher {
} }
} }
/**
*
* @return charValues
*/
private static Object[] findElements() { private static Object[] findElements() {
Object[] charValues = new Object[keyword.length()]; Object[] charValues = new Object[keyword.length()];
for (int i = 0; i < charValues.length; i++) { for (int i = 0; i < charValues.length; i++) {
for (int j = 0; j < abecedarium.length(); j++) { int charValueIndex = abecedarium.indexOf(keyword.charAt(i));
if (keyword.charAt(i) == abecedarium.charAt(j)) { charValues[i] = charValueIndex > -1 ? charValueIndex : null;
charValues[i] = j;
}
}
} }
return charValues; return charValues;
} }
/**
*
* @param table
* @return tableSorted
*/
private static Object[][] sortTable(Object[][] table) { private static Object[][] sortTable(Object[][] table) {
Object[][] tableSorted = new Object[table.length][table[0].length]; Object[][] tableSorted = new Object[table.length][table[0].length];
for (int i = 0; i < tableSorted.length; i++) { for (int i = 0; i < tableSorted.length; i++) {
@ -150,6 +158,13 @@ public class ColumnarTranspositionCipher {
return tableSorted; return tableSorted;
} }
/**
*
* @param table
* @param rows
* @param column
* @return columnArray
*/
private static Object[] getColumn(Object[][] table, int rows, int column) { private static Object[] getColumn(Object[][] table, int rows, int column) {
Object[] columnArray = new Object[rows]; Object[] columnArray = new Object[rows];
for (int i = 0; i < rows; i++) { for (int i = 0; i < rows; i++) {
@ -158,7 +173,15 @@ public class ColumnarTranspositionCipher {
return columnArray; return columnArray;
} }
private static void switchColumns(Object[][] table, int firstColumnIndex, int secondColumnIndex, Object[] columnToSwitch) { /**
*
* @param table
* @param firstColumnIndex
* @param secondColumnIndex
* @param columnToSwitch
*/
private static void switchColumns(Object[][] table, int firstColumnIndex,
int secondColumnIndex, Object[] columnToSwitch) {
for (int i = 0; i < table.length; i++) { for (int i = 0; i < table.length; i++) {
table[i][secondColumnIndex] = table[i][firstColumnIndex]; table[i][secondColumnIndex] = table[i][firstColumnIndex];
table[i][firstColumnIndex] = columnToSwitch[i]; table[i][firstColumnIndex] = columnToSwitch[i];
@ -191,8 +214,10 @@ public class ColumnarTranspositionCipher {
String wordBeingEncrypted = "This is a test of the Columnar Transposition Cipher"; String wordBeingEncrypted = "This is a test of the Columnar Transposition Cipher";
System.out.println("### Example of Columnar Transposition Cipher ###\n"); System.out.println("### Example of Columnar Transposition Cipher ###\n");
System.out.println("Word being encryped ->>> " + wordBeingEncrypted); System.out.println("Word being encryped ->>> " + wordBeingEncrypted);
System.out.println("Word encrypted ->>> " + ColumnarTranspositionCipher.encrpyter(wordBeingEncrypted, keywordForExample)); System.out.println("Word encrypted ->>> " + ColumnarTranspositionCipher
System.out.println("Word decryped ->>> " + ColumnarTranspositionCipher.decrypter()); .encrpyter(wordBeingEncrypted, keywordForExample));
System.out.println("Word decryped ->>> " + ColumnarTranspositionCipher
.decrypter());
System.out.println("\n### Encrypted Table ###"); System.out.println("\n### Encrypted Table ###");
showTable(); showTable();
} }