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evilaliv3/scrypt-async-js

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scrypt-async.js

Summary

Maintainability
F
6 days
Test Coverage

Function scrypt has a Cognitive Complexity of 108 (exceeds 5 allowed). Consider refactoring.
Open

function scrypt(password, salt, logN, r, dkLen, interruptStep, callback, encoding) {
  'use strict';

  function SHA256(m) {
    /** @const */ var K = [
Severity: Minor
Found in scrypt-async.js - About 2 days 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

Function scrypt has 358 lines of code (exceeds 25 allowed). Consider refactoring.
Open

function scrypt(password, salt, logN, r, dkLen, interruptStep, callback, encoding) {
  'use strict';

  function SHA256(m) {
    /** @const */ var K = [
Severity: Major
Found in scrypt-async.js - About 1 day to fix

    File scrypt-async.js has 362 lines of code (exceeds 250 allowed). Consider refactoring.
    Open

    /*!
 * Fast "async" scrypt implementation in JavaScript.
 * Copyright (c) 2013-2015 Dmitry Chestnykh | BSD License
 * https://github.com/dchest/scrypt-async-js
 */
    Severity: Minor
    Found in scrypt-async.js - About 4 hrs to fix

      Function SHA256 has 88 lines of code (exceeds 25 allowed). Consider refactoring.
      Open

        function SHA256(m) {
    /** @const */ var K = [
      0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b,
      0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01,
      0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7,
      Severity: Major
      Found in scrypt-async.js - About 3 hrs to fix

        Function salsaXOR has 70 lines of code (exceeds 25 allowed). Consider refactoring.
        Open

          function salsaXOR(tmp, B, bin, bout) {
    var j0  = tmp[0]  ^ B[bin++],
        j1  = tmp[1]  ^ B[bin++],
        j2  = tmp[2]  ^ B[bin++],
        j3  = tmp[3]  ^ B[bin++],
        Severity: Major
        Found in scrypt-async.js - About 2 hrs to fix

          Function blocks has 42 lines of code (exceeds 25 allowed). Consider refactoring.
          Open

              function blocks(p) {
      var off = 0, len = p.length;
      while (len >= 64) {
        var a = h0, b = h1, c = h2, d = h3, e = h4, f = h5, g = h6, h = h7,
            u, i, j, t1, t2;
          Severity: Minor
          Found in scrypt-async.js - About 1 hr to fix

            Function PBKDF2_HMAC_SHA256_OneIter has 28 lines of code (exceeds 25 allowed). Consider refactoring.
            Open

              function PBKDF2_HMAC_SHA256_OneIter(password, salt, dkLen) {
    // compress password if it's longer than hash block length
    password = password.length <= 64 ? password : SHA256(password);

    var i, innerLen = 64 + salt.length + 4,
            Severity: Minor
            Found in scrypt-async.js - About 1 hr to fix

              Function scrypt has 8 arguments (exceeds 4 allowed). Consider refactoring.
              Open

              function scrypt(password, salt, logN, r, dkLen, interruptStep, callback, encoding) {
              Severity: Major
              Found in scrypt-async.js - About 1 hr to fix

                Function blockMix has 5 arguments (exceeds 4 allowed). Consider refactoring.
                Open

                  function blockMix(tmp, B, bin, bout, r) {
                Severity: Minor
                Found in scrypt-async.js - About 35 mins to fix

                  Function blockXOR has 5 arguments (exceeds 4 allowed). Consider refactoring.
                  Open

                    function blockXOR(dst, di, src, si, len) {
                  Severity: Minor
                  Found in scrypt-async.js - About 35 mins to fix

                    Function blockCopy has 5 arguments (exceeds 4 allowed). Consider refactoring.
                    Open

                      function blockCopy(dst, di, src, si, len) {
                    Severity: Minor
                    Found in scrypt-async.js - About 35 mins to fix

                      Function interruptedFor has 5 arguments (exceeds 4 allowed). Consider refactoring.
                      Open

                        function interruptedFor(start, end, step, fn, donefn) {
                      Severity: Minor
                      Found in scrypt-async.js - About 35 mins to fix

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

                                  t2 = ((((a>>>2) | (a<<(32-2))) ^ ((a>>>13) | (a<<(32-13))) ^
               ((a>>>22) | (a<<(32-22)))) + ((a & b) ^ (a & c) ^ (b & c))) | 0;
                        Severity: Major
                        Found in scrypt-async.js and 1 other location - About 1 hr to fix
                        scrypt-async.js on lines 79..80

                        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

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

                                  t1 = ((((((e>>>6) | (e<<(32-6))) ^ ((e>>>11) | (e<<(32-11))) ^
               ((e>>>25) | (e<<(32-25)))) + ((e & f) ^ (~e & g))) | 0) +
                        Severity: Major
                        Found in scrypt-async.js and 1 other location - About 1 hr to fix
                        scrypt-async.js on lines 83..84

                        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

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

                                  t2 = ((u>>>7) | (u<<(32-7))) ^ ((u>>>18) | (u<<(32-18))) ^ (u>>>3);
                        Severity: Minor
                        Found in scrypt-async.js and 1 other location - About 50 mins to fix
                        scrypt-async.js on lines 70..70

                        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 51.

                        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

                                  t1 = ((u>>>17) | (u<<(32-17))) ^ ((u>>>19) | (u<<(32-19))) ^ (u>>>10);
                        Severity: Minor
                        Found in scrypt-async.js and 1 other location - About 50 mins to fix
                        scrypt-async.js on lines 73..73

                        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 51.

                        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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