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rapid7/metasploit-framework

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modules/auxiliary/analyze/crack_linux.rb

Summary

Maintainability
D
2 days
Test Coverage

Method run has a Cognitive Complexity of 67 (exceeds 5 allowed). Consider refactoring.
Open

  def run
    def check_results(passwords, results, hash_type, method)
      passwords.each do |password_line|
        password_line.chomp!
        next if password_line.blank?
Severity: Minor
Found in modules/auxiliary/analyze/crack_linux.rb - About 1 day to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Method run has 128 lines of code (exceeds 25 allowed). Consider refactoring.
Open

  def run
    def check_results(passwords, results, hash_type, method)
      passwords.each do |password_line|
        password_line.chomp!
        next if password_line.blank?
Severity: Major
Found in modules/auxiliary/analyze/crack_linux.rb - About 5 hrs to fix

    Method check_results has a Cognitive Complexity of 21 (exceeds 5 allowed). Consider refactoring.
    Open

        def check_results(passwords, results, hash_type, method)
      passwords.each do |password_line|
        password_line.chomp!
        next if password_line.blank?
    Severity: Minor
    Found in modules/auxiliary/analyze/crack_linux.rb - About 2 hrs to fix

    Cognitive Complexity

    Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

    A method's cognitive complexity is based on a few simple rules:

    • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
    • Code is considered more complex for each "break in the linear flow of the code"
    • Code is considered more complex when "flow breaking structures are nested"

    Further reading

    Method initialize has 38 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

      def initialize
    super(
      'Name' => 'Password Cracker: Linux',
      'Description' => %{
          This module uses John the Ripper or Hashcat to identify weak passwords that have been
    Severity: Minor
    Found in modules/auxiliary/analyze/crack_linux.rb - About 1 hr to fix

      Similar blocks of code found in 3 locations. Consider refactoring.
      Open

              elsif action.name == 'hashcat'
          next unless fields.count >= 2 # If we don't have an expected minimum number of fields, this is probably not a hash line

          cred['core_id'] = fields.shift
          cred['hash'] = fields.shift
      Severity: Major
      Found in modules/auxiliary/analyze/crack_linux.rb and 2 other locations - About 1 hr to fix
      modules/auxiliary/analyze/crack_osx.rb on lines 71..81
      modules/auxiliary/analyze/crack_webapps.rb on lines 69..79

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 58.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 7 locations. Consider refactoring.
      Open

        def show_command(cracker_instance)
    return unless datastore['ShowCommand']

    if action.name == 'john'
      cmd = cracker_instance.john_crack_command
      Severity: Major
      Found in modules/auxiliary/analyze/crack_linux.rb and 6 other locations - About 25 mins to fix
      modules/auxiliary/analyze/crack_aix.rb on lines 40..48
      modules/auxiliary/analyze/crack_databases.rb on lines 53..61
      modules/auxiliary/analyze/crack_mobile.rb on lines 40..48
      modules/auxiliary/analyze/crack_osx.rb on lines 42..50
      modules/auxiliary/analyze/crack_webapps.rb on lines 43..51
      modules/auxiliary/analyze/crack_windows.rb on lines 57..65

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 29.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 2 locations. Consider refactoring.
      Open

                next unless fields.count >= 3 # If we don't have an expected minimum number of fields, this is probably not a hash line

          cred['username'] = fields.shift
          cred['core_id'] = fields.pop
          4.times { fields.pop } # Get rid of extra :
      Severity: Minor
      Found in modules/auxiliary/analyze/crack_linux.rb and 1 other location - About 20 mins to fix
      modules/auxiliary/analyze/crack_mobile.rb on lines 61..66

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 28.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 4 locations. Consider refactoring.
      Open

            'Name' => 'Password Cracker: Linux',
      'Description' => %{
          This module uses John the Ripper or Hashcat to identify weak passwords that have been
        acquired from unshadowed passwd files from Unix/Linux systems. The module will only crack
        MD5, BSDi and DES implementations by default. However, it can also crack
      Severity: Minor
      Found in modules/auxiliary/analyze/crack_linux.rb and 3 other locations - About 20 mins to fix
      modules/auxiliary/analyze/crack_aix.rb on lines 13..30
      modules/auxiliary/analyze/crack_databases.rb on lines 16..39
      modules/auxiliary/analyze/crack_windows.rb on lines 13..35

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 27.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

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