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coffeejunk/crypt19

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lib/crypt/rijndael.rb

Summary

Maintainability
C
1 day
Test Coverage

Method generate_key_schedule has 50 lines of code (exceeds 25 allowed). Consider refactoring.
Open

    def generate_key_schedule(k, key_bits, block_bits)
      tk = k[0..3][0..@key_words-1]  # using slice to get a copy instead of a reference
      key_sched = []
      (@rounds + 1).times { key_sched << [[], [], [], []] }
      t = 0
Severity: Minor
Found in lib/crypt/rijndael.rb - About 2 hrs to fix

    Method initialize has 46 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

        def initialize(user_key, key_bits = 256, block_bits = 128)
      case key_bits
        when 128
          @key_words = 4
        when 192
    Severity: Minor
    Found in lib/crypt/rijndael.rb - About 1 hr to fix

      Method generate_key_schedule has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
      Open

          def generate_key_schedule(k, key_bits, block_bits)
      tk = k[0..3][0..@key_words-1]  # using slice to get a copy instead of a reference
      key_sched = []
      (@rounds + 1).times { key_sched << [[], [], [], []] }
      t = 0
      Severity: Minor
      Found in lib/crypt/rijndael.rb - About 55 mins 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 a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
      Open

          def initialize(user_key, key_bits = 256, block_bits = 128)
      case key_bits
        when 128
          @key_words = 4
        when 192
      Severity: Minor
      Found in lib/crypt/rijndael.rb - About 35 mins 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

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

          def decrypt_block(block)
      raise "block must be #{@block_size} bytes long" if (block.length() != @block_size)
      block_array = [[], [], [], []]
      block_bytes = block.bytes.to_a
      0.upto(@block_size - 1) { |pos|
      Severity: Major
      Found in lib/crypt/rijndael.rb and 1 other location - About 1 hr to fix
      lib/crypt/rijndael.rb on lines 219..231

      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 66.

      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 2 locations. Consider refactoring.
      Open

          def encrypt_block(block)
      raise "block must be #{@block_size} bytes long" if (block.length() != @block_size)
      block_array = [[], [], [], []]
      block_bytes = block.bytes.to_a
      0.upto(@block_size - 1) { |pos|
      Severity: Major
      Found in lib/crypt/rijndael.rb and 1 other location - About 1 hr to fix
      lib/crypt/rijndael.rb on lines 252..264

      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 66.

      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

            while ((j < @key_words) && (t < (@rounds+1)*@block_words))
        0.upto(3) { |i|
          key_sched[t / @block_words][i][t % @block_words] = tk[i][j]
        }
        j += 1
      Severity: Minor
      Found in lib/crypt/rijndael.rb and 1 other location - About 50 mins to fix
      lib/crypt/rijndael.rb on lines 191..197

      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 42.

      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

              while ((j < @key_words) && (t < (@rounds+1) * @block_words))
          0.upto(3) { |i|
            key_sched[t / @block_words][i][t % @block_words] = tk[i][j]
          }
          j += 1
      Severity: Minor
      Found in lib/crypt/rijndael.rb and 1 other location - About 50 mins to fix
      lib/crypt/rijndael.rb on lines 154..160

      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 42.

      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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