Skip to content

added bruteforce to the caesar ciphers #2887

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Jan 1, 2022
Merged

added bruteforce to the caesar ciphers #2887

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
1b5e1d4
added bruteforce to the caesar ciphers
subhroacharjee Jan 1, 2022
dccc58c
changed variable for tests
subhroacharjee Jan 1, 2022
f2c25f5
added some default values
subhroacharjee Jan 1, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
28 changes: 25 additions & 3 deletions src/main/java/com/thealgorithms/ciphers/Caesar.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -91,28 +91,50 @@ private static boolean IsCapitalLatinLetter(char c) {
private static boolean IsSmallLatinLetter(char c) {
return c >= 'a' && c <= 'z';
}
/**
* @return string array which contains all the possible decoded combination.
*/
public static String[] bruteforce(String encryptedMessage) {
String[] listOfAllTheAnswers = new String[27];
for (int i=0; i<=26; i++) {
listOfAllTheAnswers[i] = decode(encryptedMessage, i);
}

return listOfAllTheAnswers;
}

public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int shift = 0;
System.out.println("Please enter the message (Latin Alphabet)");
String message = input.nextLine();
System.out.println(message);
System.out.println("Please enter the shift number");
int shift = input.nextInt() % 26;
System.out.println("(E)ncode or (D)ecode ?");
System.out.println("(E)ncode or (D)ecode or (B)ruteforce?");
char choice = input.next().charAt(0);
switch (choice) {
case 'E':
case 'e':
System.out.println("Please enter the shift number");
shift = input.nextInt() % 26;
System.out.println(
"ENCODED MESSAGE IS \n" + encode(message, shift)); // send our function to handle
break;
case 'D':
case 'd':
System.out.println("Please enter the shift number");
shift = input.nextInt() % 26;
System.out.println("DECODED MESSAGE IS \n" + decode(message, shift));
break;
case 'B':
case 'b':
String[] listOfAllTheAnswers = bruteforce(message);
for (int i =0; i<=26; i++) {
System.out.println("FOR SHIFT " + String.valueOf(i) + " decoded message is " + listOfAllTheAnswers[i]);
}
default:
System.out.println("default case");
}

input.close();
}
}