[GFTCodeFixer]: Update on src/main/java/com/scalesec/vulnado/User.java

[dcoccia]

Generated for GFT AI Impact Bot for the 6b6d8e4

Description: This pull request modifies the User.java file in the src/main/java/com/scalesec/vulnado directory. The changes include alterations to the class structure, method implementations, and database query handling. However, the modifications introduce several issues related to code quality, functionality, and security vulnerabilities.

Summary:

• File Modified: src/main/java/com/scalesec/vulnado/User.java
• Detailed Description of Changes:
  • Changed instance variables (id, username, hashedPassword) to static final, which is inappropriate for user-specific data.
  • Removed the Keys.hmacShaKeyFor method and replaced it with direct usage of Jwts.parserBuilder().setSigningKey(key).build().parseClaimsJws(token) in the assertAuth method.
  • Refactored the fetch method to use PreparedStatement for parameterized queries but introduced redundant and misplaced code blocks.
  • Removed the cxn.close() call, which could lead to resource leaks.
  • Introduced duplicate and misplaced logging statements.
  • Removed proper exception handling in the fetch method, leading to potential runtime issues.

Recommendation:

1. Revert Static Final Variables:

   • The id, username, and hashedPassword fields should not be static final. These fields represent user-specific data and should remain instance variables.
   • Suggested Fix:

     private String id; // User ID
     private String username; // Username
     private String hashedPassword; // Hashed password

2. Fix Token Generation and Validation:

   • Ensure proper usage of Keys.hmacShaKeyFor for secure key generation. The current implementation may lead to security vulnerabilities.
   • Suggested Fix:

     SecretKey key = Keys.hmacShaKeyFor(secret.getBytes());
     return Jwts.builder().setSubject(this.username).signWith(key).compact();

3. Correct Database Connection Handling:

   • Ensure the database connection (cxn) is closed properly to avoid resource leaks.
   • Suggested Fix:

     try (Connection cxn = Postgres.connection()) {
         // Database operations
     } catch (Exception e) {
         logger.severe(e.getMessage());
     }

4. Remove Redundant Code:

   • Eliminate duplicate logging statements and misplaced code blocks in the fetch method.
   • Suggested Fix:

     Logger logger = Logger.getLogger(User.class.getName());
     logger.info("Opened database successfully");
     PreparedStatement pstmt = cxn.prepareStatement("SELECT * FROM users WHERE username = ? LIMIT 1");
     pstmt.setString(1, un);
     ResultSet rs = pstmt.executeQuery();
     if (rs.next()) {
         String userId = rs.getString("user_id");
         String username = rs.getString("username");
         String password = rs.getString("password");
         user = new User(userId, username, password);
     }

5. Improve Exception Handling:

   • Restore proper exception handling in the fetch method to ensure errors are logged and handled gracefully.

Explanation of vulnerabilities:

1. Static Final Variables for User Data:

   • Making user-specific fields (id, username, hashedPassword) static final means these values will be shared across all instances of the User class, leading to incorrect behavior and potential data leakage.
   • Suggested Fix: Revert these fields to instance variables.

2. Improper Key Handling in assertAuth:

   • The removal of Keys.hmacShaKeyFor compromises the security of the token validation process. Using a secure key generation method is critical to prevent token forgery.
   • Suggested Fix: Use Keys.hmacShaKeyFor(secret.getBytes()) for secure key generation.

3. SQL Injection Risk:

   • While the use of PreparedStatement mitigates SQL injection risks, the redundant and misplaced code blocks in the fetch method could lead to errors and vulnerabilities.
   • Suggested Fix: Clean up the fetch method to ensure proper query execution and result handling.

4. Resource Leak:

   • The removal of cxn.close() in the fetch method can lead to resource leaks, which may degrade application performance over time.
   • Suggested Fix: Use a try-with-resources block to ensure the connection is closed properly.

By addressing these issues, the code can be improved in terms of functionality, security, and maintainability.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud