- Create a Class called User that has 2 String instance variables:
private String username;
private String passHash;- Create a User constructor that has 2 parameters username and passHash and assigns these parameters to its instance variables.
- Create 2 methods getUsername and getPassHash that return the instance variables respectively.
- Analyze the method signature parseShadow and note what it's return type is below:
- Return Type?
- A Unix/Linux Shadow file contains username and password hashes for each user seperated by a delimiter :
- In this section, follow the steps below to parse each username and password hash out of the provided Shadow file and store it in a user array.
- Complete the body of the parseShadow method utilizing:
- the pre-complete method getLineCount to create a user array called Users
- imported class FileInputStream
- imported class Scanner
- a while loop that uses the above 2 imported classes to read the resources/shadow file line by line.
- the split method and the delimiter : to split each line into a string array (i.e. String[])
- use the first 2 elements of the split string array to create a new User(element1, element2)
- and finally store each new User into a User array (i.e. User[] users), and return the array.
- Finish implementing the method crack to do the following:
- Similar to your parseShadow method, use the FileInputStream and Scanner class to read the resources/englishSmall.dic file line by line.
- Note: the file path should be passed in a parameter.
- For each word read from your englishSmall.dic dictionary iterate over your User[] array and use the Crypt library to build a password hash of the dictionary word.
String hash = Crypt.crypt(word, user.getPassHash());
- Add a conditional to compare the generated hash with each user's password hash.
- Note: only compare users with $ in their password hashes, otherwise you'll get an error.
- If the user's password hash matches the generated hash, print out:
Found password X for user Y.
- Similar to your parseShadow method, use the FileInputStream and Scanner class to read the resources/englishSmall.dic file line by line.
- Make sure to use the Git tab at the bottom of IntelliJ to create a Feature1 feature branch
- Commit and Push your running code back to your GitHub account
- Issue a Pull request back to my Java-Lab-009 repo
- Cut and Paste the Pull request URL into your Canvas assignment to turn it in.
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