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GitHub - maciejczyzewski/libchaos: Advanced library for randomization, hashing and statistical analysis (devoted to chaos machines). :microscope:
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6.2525 5.55125C6.2525 5.55125 7.17375 5.2625 9.2775 6.67875C10.1575 6.43125 11.0925 6.3075 12.0275 6.3075C12.9625 6.3075 13.8975 6.43125 14.7775 6.67875C16.8813 5.24875 17.8025 5.55125 17.8025 5.55125C18.4075 7.06375 18.0225 8.19125 17.9125 8.46625C18.6138 9.23625 19.04 10.2125 19.04 11.4225C19.04 15.6437 16.4688 16.5787 14.0213 16.8537C14.42 17.1975 14.7638 17.8575 14.7638 18.8887C14.7638 20.36 14.75 21.5425 14.75 21.9137C14.75 22.2025 14.9563 22.5462 15.5063 22.4362C19.8513 20.9787 23 16.8537 23 12C23 5.9225 18.0775 1 12 1Z"></path> </svg> </a> <div class="flex-1 flex-order-2 text-right"> <a href="/login?return_to=https%3A%2F%2Fgithub.com%2Fmaciejczyzewski%2Flibchaos" class="HeaderMenu-link HeaderMenu-button d-inline-flex d-lg-none flex-order-1 f5 no-underline border color-border-default rounded-2 px-2 py-1 color-fg-inherit js-prevent-focus-on-mobile-nav" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"site header 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class="color-fg-default h4">GitHub Copilot</div> Write better code with AI </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"github_advanced_security","context":"product","tag":"link","label":"github_advanced_security_link_product_navbar"}" href="https://github.com/security/advanced-security"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-shield-check color-fg-subtle mr-3"> <path d="M16.53 9.78a.75.75 0 0 0-1.06-1.06L11 13.19l-1.97-1.97a.75.75 0 0 0-1.06 1.06l2.5 2.5a.75.75 0 0 0 1.06 0l5-5Z"></path><path d="m12.54.637 8.25 2.675A1.75 1.75 0 0 1 22 4.976V10c0 6.19-3.771 10.704-9.401 12.83a1.704 1.704 0 0 1-1.198 0C5.77 20.705 2 16.19 2 10V4.976c0-.758.489-1.43 1.21-1.664L11.46.637a1.748 1.748 0 0 1 1.08 0Zm-.617 1.426-8.25 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2.7 2.908 2.7a.75.75 0 1 1-1.02 1.1l-3.5-3.25a.75.75 0 0 1 0-1.1l3.5-3.25a.75.75 0 0 1 1.06.04Zm3.44 1.06a.75.75 0 1 1 1.02-1.1l3.5 3.25a.75.75 0 0 1 0 1.1l-3.5 3.25a.75.75 0 1 1-1.02-1.1l2.908-2.7-2.908-2.7Z"></path><path d="M1.5 4.25c0-.966.784-1.75 1.75-1.75h17.5c.966 0 1.75.784 1.75 1.75v12.5a1.75 1.75 0 0 1-1.75 1.75h-9.69l-3.573 3.573A1.458 1.458 0 0 1 5 21.043V18.5H3.25a1.75 1.75 0 0 1-1.75-1.75ZM3.25 4a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h2.5a.75.75 0 0 1 .75.75v3.19l3.72-3.72a.749.749 0 0 1 .53-.22h10a.25.25 0 0 0 .25-.25V4.25a.25.25 0 0 0-.25-.25Z"></path> </svg> <div> <div class="color-fg-default h4">Code Review</div> Manage code changes </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"discussions","context":"product","tag":"link","label":"discussions_link_product_navbar"}" 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seriously.</p> <textarea name="feedback" class="form-control width-full mb-2" style="height: 120px" id="feedback"></textarea> <input name="include_email" id="include_email" aria-label="Include my email address so I can be contacted" class="form-control mr-2" type="checkbox"> <label for="include_email" style="font-weight: normal">Include my email address so I can be contacted</label> </form></div> </scrollable-region> <div data-view-component="true" class="Overlay-footer Overlay-footer--alignEnd"> <button data-close-dialog-id="feedback-dialog" type="button" data-view-component="true" class="btn"> Cancel </button> <button form="code-search-feedback-form" data-action="click:qbsearch-input#submitFeedback" type="submit" data-view-component="true" class="btn-primary btn"> Submit feedback </button> </div> </dialog></dialog-helper> <custom-scopes data-target="qbsearch-input.customScopesManager"> <dialog-helper> <dialog data-target="custom-scopes.customScopesModalDialog" data-action="close:qbsearch-input#handleDialogClose cancel:qbsearch-input#handleDialogClose" id="custom-scopes-dialog" aria-modal="true" aria-labelledby="custom-scopes-dialog-title" aria-describedby="custom-scopes-dialog-description" data-view-component="true" class="Overlay Overlay-whenNarrow Overlay--size-medium Overlay--motion-scaleFade Overlay--disableScroll"> <div data-view-component="true" class="Overlay-header Overlay-header--divided"> <div class="Overlay-headerContentWrap"> <div class="Overlay-titleWrap"> <h1 class="Overlay-title " id="custom-scopes-dialog-title"> Saved searches </h1> <h2 id="custom-scopes-dialog-description" class="Overlay-description">Use saved searches to filter your results more quickly</h2> </div> <div class="Overlay-actionWrap"> <button data-close-dialog-id="custom-scopes-dialog" aria-label="Close" type="button" data-view-component="true" class="close-button Overlay-closeButton"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x"> <path d="M3.72 3.72a.75.75 0 0 1 1.06 0L8 6.94l3.22-3.22a.749.749 0 0 1 1.275.326.749.749 0 0 1-.215.734L9.06 8l3.22 3.22a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L8 9.06l-3.22 3.22a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L6.94 8 3.72 4.78a.75.75 0 0 1 0-1.06Z"></path> </svg></button> </div> </div> </div> <scrollable-region data-labelled-by="custom-scopes-dialog-title"> <div data-view-component="true" class="Overlay-body"> <div data-target="custom-scopes.customScopesModalDialogFlash"></div> <div hidden class="create-custom-scope-form" data-target="custom-scopes.createCustomScopeForm"> <!-- '"` --><!-- </textarea></xmp> --></option></form><form id="custom-scopes-dialog-form" data-turbo="false" action="/search/custom_scopes" accept-charset="UTF-8" method="post"><input type="hidden" data-csrf="true" name="authenticity_token" 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src=\"https://camo.githubusercontent.com/5c349e377afba6134c8b6816be678b0afe6bdda7340629b112f3f308374dce26/687474703a2f2f6d616369656a637a797a6577736b692e6d652f6c69626368616f732f5f7374617469632f6c69626368616f732e737667\" alt=\"libchaos\" title=\"libchaos\" align=\"right\" width=\"100\" height=\"100\" data-canonical-src=\"http://maciejczyzewski.me/libchaos/_static/libchaos.svg\" style=\"max-width: 100%;\"\u003e\n\u003c/a\u003e\n[![Current Release](\u003ca href=\"https://img.shields.io/github/release/maciejczyzewski/libchaos.svg)](https://github.com/maciejczyzewski/libchaos/releases\" rel=\"nofollow\"\u003ehttps://img.shields.io/github/release/maciejczyzewski/libchaos.svg)](https://github.com/maciejczyzewski/libchaos/releases\u003c/a\u003e)\n[![Build Status](\u003ca href=\"https://travis-ci.org/maciejczyzewski/libchaos.svg?branch=master)](https://travis-ci.org/maciejczyzewski/libchaos\" rel=\"nofollow\"\u003ehttps://travis-ci.org/maciejczyzewski/libchaos.svg?branch=master)](https://travis-ci.org/maciejczyzewski/libchaos\u003c/a\u003e)\n\u003cp dir=\"auto\"\u003e\u003ca href=\"#features\"\u003eFeatures\u003c/a\u003e |\n\u003ca href=\"#overview\"\u003eOverview\u003c/a\u003e |\n\u003ca href=\"#installation\"\u003eInstallation\u003c/a\u003e |\n\u003ca href=\"#user-guide\"\u003eUser Guide\u003c/a\u003e |\n\u003ca href=\"#contributing\"\u003eContributing\u003c/a\u003e |\n\u003ca href=\"#license\"\u003eLicense\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eGot a question?\u003c/strong\u003e Join us on \u003ca href=\"http://stackoverflow.com/questions/tagged/libchaos\" rel=\"nofollow\"\u003estackoverflow\u003c/a\u003e or chat on \u003ca href=\"https://webchat.freenode.net/?channels=#libchaos\" rel=\"nofollow\"\u003eIRC\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cem\u003eAdvanced library for randomization, hashing and statistical analysis (devoted to \u003ca href=\"https://en.wikipedia.org/wiki/Chaos_machine\" rel=\"nofollow\"\u003echaos machines\u003c/a\u003e).\u003c/em\u003e\u003c/p\u003e\n\u003chr\u003e\n\u003cp dir=\"auto\"\u003eLibchaos is a computing library written in the C++ language to help with the development of software for scientific research. The library tries to be as general as possible, modern and easy-to-use.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eProject goal is to \u003cem\u003eimplement \u0026amp; analyze\u003c/em\u003e various algorithms for randomization and hashing, while maintaining simplicity and security, making them suitable for use in your own code. Popular tools like \u003ca href=\"http://simul.iro.umontreal.ca/testu01/tu01.html\" rel=\"nofollow\"\u003eTestU01\u003c/a\u003e, \u003ca href=\"https://www.phy.duke.edu/~rgb/General/dieharder.php\" rel=\"nofollow\"\u003eDieharder\u003c/a\u003e and \u003ca href=\"https://github.com/jessek/hashdeep\"\u003eHashdeep\u003c/a\u003e are obsolete or their development has been stopped. Libchaos aims to replace them.\u003c/p\u003e\n\u003chr\u003e\n\u003cp dir=\"auto\"\u003eThe library implements wide range of \u003ca href=\"#chaos-machines-theorypdf\"\u003echaos machines\u003c/a\u003e, which present the idea of creating a universal scheme with modular design and customizable parameters, which can be applied wherever \u003cem\u003erandomness\u003c/em\u003e and \u003cem\u003esensitiveness\u003c/em\u003e is needed (pseudo-random oracle).\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"std::string hash = chaos::password\u0026lt;CHAOS_MACHINE_XORRING64, 500, 50, 95\u0026gt;(\u0026quot;my password\u0026quot;, \u0026quot;private salt\u0026quot;);\n// hash == \u0026quot;EA79560A7E0937EC66BDBE22EAFDC96AA5D7AFE4E970C3C856B7D92632EAA8EEC828E61E59E024922F58D4045BC053E\u0026quot;\"\u003e\u003cpre\u003estd::string hash = chaos::password\u0026lt;CHAOS_MACHINE_XORRING64, \u003cspan class=\"pl-c1\"\u003e500\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e50\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e95\u003c/span\u003e\u0026gt;(\u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003emy password\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e, \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eprivate salt\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e);\n\u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e hash == \"EA79560A7E0937EC66BDBE22EAFDC96AA5D7AFE4E970C3C856B7D92632EAA8EEC828E61E59E024922F58D4045BC053E\"\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIt turns out that a pseudo-random function can be easily enriched by a \u003ca href=\"https://en.wikipedia.org/wiki/Chaos_theory\" rel=\"nofollow\"\u003echaotic system\u003c/a\u003e, creating something completely new. What's interesting is that this scheme allows specification by three parameters: \u003cem\u003eexecution time\u003c/em\u003e, \u003cem\u003eperiod/memory required\u003c/em\u003e, \u003cem\u003einitial secret key\u003c/em\u003e.\u003c/p\u003e\n\u003chr\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eGetting Help\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf you have questions about the library, please be sure to check out the \u003ca href=\"#\"\u003eAPI documentation\u003c/a\u003e. If you still have questions, reach out to us on \u003ca href=\"https://webchat.freenode.net/?channels=#libchaos\" rel=\"nofollow\"\u003eIRC\u003c/a\u003e or post a question on \u003ca href=\"http://stackoverflow.com/questions/tagged/libchaos\" rel=\"nofollow\"\u003estackoverflow\u003c/a\u003e (using the \u003ccode\u003elibchaos\u003c/code\u003e tag).\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eReporting Bugs\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003ePlease open a \u003ca href=\"https://github.com/maciejczyzewski/libchaos/issues\"\u003eGitHub Issue\u003c/a\u003e and include as much information as you can. If possible, provide sample code that illustrates the problem you're reporting. If you're seeing a bug only on a specific repository, please provide a link to it if possible.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cem\u003eDo not open a GitHub Issue for help, only for bug reports.\u003c/em\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eFeatures\u003c/h1\u003e\u003ca id=\"user-content-features\" class=\"anchor\" aria-label=\"Permalink: Features\" href=\"#features\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003cth width=\"30%\"\u003eReady\u003c/th\u003e\n\u003cth width=\"30%\"\u003eIn Progress\u003c/th\u003e\n\u003cth width=\"30%\"\u003eTODO\u003c/th\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChaos machines\u003c/td\u003e\n\u003ctd\u003eStatistical tests \u0026amp; functions\u003c/td\u003e\n\u003ctd\u003eEntropy pools (different seeding scenarios)\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePseudo-random number generators\u003c/td\u003e\n\u003ctd\u003eAdapter for truely random generators (dynamical reseeding)\u003c/td\u003e\n\u003ctd\u003eGnuplot/R utilities \u0026amp; analysis\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignatures for algorithms (portability on various architectures)\u003c/td\u003e\n\u003ctd\u003eRanking for algorithms (speed/quality)\u003c/td\u003e\n\u003ctd\u003eJavascript API\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTL compatibility\u003c/td\u003e\n\u003ctd\u003eHashdeep fork (named chaosdeep)\u003c/td\u003e\n\u003ctd\u003eSeed recovery (attacks)\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eOverview\u003c/h1\u003e\u003ca id=\"user-content-overview\" class=\"anchor\" aria-label=\"Permalink: Overview\" href=\"#overview\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ca target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https://camo.githubusercontent.com/2e209afa5fc08d5715331ca0967a326a78869c7366a9fd2455af944cf6a35111/687474703a2f2f6d616369656a637a797a6577736b692e6d652f6c69626368616f732f5f696d616765732f62656e63686d61726b2e737667\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/2e209afa5fc08d5715331ca0967a326a78869c7366a9fd2455af944cf6a35111/687474703a2f2f6d616369656a637a797a6577736b692e6d652f6c69626368616f732f5f696d616765732f62656e63686d61726b2e737667\" alt=\"benchmark\" data-canonical-src=\"http://maciejczyzewski.me/libchaos/_images/benchmark.svg\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eEach software problem requires different tools and algorithms to solve it effectively and achieve best results. \u003cem\u003eEngineer's problem is how to decide which method will suit his needs best.\u003c/em\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003c/p\u003e\u003cmarkdown-accessiblity-table\u003e\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003cth width=\"50%\"\u003eExample\u003c/th\u003e\n\u003cth width=\"50%\"\u003eInstructions\u003c/th\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cpre\u003e#include \u0026lt;iostream\u0026gt;\n#include \u0026lt;chaos.h\u0026gt; // library header\n\u003cp dir=\"auto\"\u003e// initialize chaos machine (64-bit version)\nCHAOS_MACHINE_XORRING64 machine;\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eint main(void) {\nmachine.set_space(100000); // 2^6400000 period length\nmachine.push(0x8a5cd789635d2dff); // add some data\nmachine.push(0x284600e3f30e38c3); // and other...\nwhile (true) putc_unlocked(machine.pull(), stdout);\n}\u003c/p\u003e\u003c/pre\u003e\u003c/td\u003e\n\u003ctd\u003e\nJust copy, paste it into new file and prompt:\n\u003cp dir=\"auto\"\u003e\u003cbr\u003e\u003cbr\u003e\u003c/p\u003e\u003cpre\u003e$ g++ -std=c++11 -lchaos example.cc\n$ ./a.out | xxd -l 1024\u003c/pre\u003e\u003cp dir=\"auto\"\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eSee it run! Have fun.\u003c/p\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cp dir=\"auto\"\u003eThis project offers very convenient interface for practical use, not just research. In the next section, there is a list of recommended algorithms and their strengths, period lengths, and speeds.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003c/p\u003e\u003cmarkdown-accessiblity-table\u003e\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003cth width=\"50%\"\u003eExample\u003c/th\u003e\n\u003cth width=\"50%\"\u003eInstructions\u003c/th\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cpre\u003e#include \u0026lt;iostream\u0026gt;\n#include \u0026lt;chaos.h\u0026gt; // library header\n\u003cp dir=\"auto\"\u003e// initialize PRNG (by Sebastiano Vigna)\nCHAOS_PRNG_XOROSHIRO1024STAR prng;\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eint main(void) {\nprng.seed(0x8a5cd789635d2dff); // initialize with seed\nwhile (true) putc_unlocked(prng.next(), stdout);\n}\u003c/p\u003e\u003c/pre\u003e\u003c/td\u003e\n\u003ctd\u003e\nNotice that you can use \u003ccode\u003eCHAOS_PRNG_*\u003c/code\u003e and \u003ccode\u003eCHAOS_MACHINE_*\u003c/code\u003e algorithms. See the table below and read the library user guide to understand the difference.\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eChaos Machines \u003ca href=\"https://eprint.iacr.org/2016/468\" rel=\"nofollow\"\u003e(theory/pdf)\u003c/a\u003e\u003c/h2\u003e\u003ca id=\"user-content-chaos-machines-theorypdf\" class=\"anchor\" aria-label=\"Permalink: Chaos Machines (theory/pdf)\" href=\"#chaos-machines-theorypdf\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIn mathematics, a chaos machine is a class of algorithms constructed on the base of chaos theory (mainly deterministic chaos) to produce \u003cstrong\u003epseudo-random oracle\u003c/strong\u003e. It was designed specifically to combine the benefits of \u003cem\u003ehash function\u003c/em\u003e and \u003cem\u003epseudo-random function\u003c/em\u003e.\u003c/p\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003cth rowspan=\"2\" width=\"100%\"\u003eName\u003c/th\u003e\n\u003cth rowspan=\"2\"\u003eInput\u003c/th\u003e\n\u003cth rowspan=\"2\"\u003eOutput\u003c/th\u003e\n\u003cth rowspan=\"2\"\u003ePeriod\u003c/th\u003e\n\u003cth rowspan=\"2\"\u003eQuality\u003c/th\u003e\n\u003cth colspan=\"2\"\u003eSpeed\u003c/th\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePush\u003c/th\u003e\u003cth\u003ePull\u003c/th\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003eCHAOS_MACHINE_NCG\u003c/code\u003e proof of concept\u003c/td\u003e\n\u003ctd\u003euint32_t\u003c/td\u003e\n\u003ctd\u003euint32_t\u003c/td\u003e\n\u003ctd\u003e(2\u003csup\u003e16n\u003c/sup\u003e,2\u003csup\u003e32n\u003c/sup\u003e)\u003c/td\u003e\n\u003ctd\u003ehigh\u003c/td\u003e\n\u003ctd\u003e4.38007M\u003cbr\u003eitems/s\u003c/td\u003e\n\u003ctd\u003e3.49098M\u003cbr\u003eitems/s\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003eCHAOS_MACHINE_XORRING32\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003euint32_t\u003c/td\u003e\n\u003ctd\u003euint32_t\u003c/td\u003e\n\u003ctd\u003e2\u003csup\u003e32n\u003c/sup\u003e\u003c/td\u003e\n\u003ctd\u003ehigh\u003c/td\u003e\n\u003ctd\u003e33.0828M\u003cbr\u003eitems/s\u003c/td\u003e\n\u003ctd\u003e48.938M\u003cbr\u003eitems/s\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003eCHAOS_MACHINE_XORRING64\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003euint64_t\u003c/td\u003e\n\u003ctd\u003euint64_t\u003c/td\u003e\n\u003ctd\u003e2\u003csup\u003e64n\u003c/sup\u003e\u003c/td\u003e\n\u003ctd\u003ehigh\u003c/td\u003e\n\u003ctd\u003e31.6051M\u003cbr\u003eitems/s\u003c/td\u003e\n\u003ctd\u003e41.6355M\u003cbr\u003eitems/s\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cp dir=\"auto\"\u003eMachines can be used to implement many cryptographic primitives, including cryptographic hashes, message authentication codes and randomness extractors.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003ePseudo-Random Number Generators\u003c/h2\u003e\u003ca id=\"user-content-pseudo-random-number-generators\" class=\"anchor\" aria-label=\"Permalink: Pseudo-Random Number Generators\" href=\"#pseudo-random-number-generators\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003ePRNGs are algorithms for \u003cstrong\u003egenerating a sequence of numbers\u003c/strong\u003e whose properties approximate the properties of sequences of random numbers. Generated sequence is \u003cstrong\u003enot truly random\u003c/strong\u003e, because it is completely determined by a relatively small set of initial values, called the seed.\u003c/p\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003cth width=\"30%\"\u003eName\u003c/th\u003e\n\u003cth\u003eSeed\u003c/th\u003e\n\u003cth\u003eOutput\u003c/th\u003e\n\u003cth\u003ePeriod\u003c/th\u003e\n\u003cth\u003eQuality\u003c/th\u003e\n\u003cth\u003eSpeed\u003c/th\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003eCHAOS_PRNG_KISS\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003euint32_t [2]\u003c/td\u003e\n\u003ctd\u003euint32_t\u003c/td\u003e\n\u003ctd\u003e2\u003csup\u003e119.5\u003c/sup\u003e\u003c/td\u003e\n\u003ctd\u003ehigh\u003c/td\u003e\n\u003ctd\u003e99.9175M items/s\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003eCHAOS_PRNG_ABYSSINIAN\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003euint32_t [2]\u003c/td\u003e\n\u003ctd\u003euint32_t\u003c/td\u003e\n\u003ctd\u003e2\u003csup\u003e126\u003c/sup\u003e\u003c/td\u003e\n\u003ctd\u003ehigh\u003c/td\u003e\n\u003ctd\u003e165.754M items/s\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003eCHAOS_PRNG_XOROSHIRO128PLUS\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003euint64_t\u003c/td\u003e\n\u003ctd\u003euint64_t\u003c/td\u003e\n\u003ctd\u003e2\u003csup\u003e128\u003c/sup\u003e\u003c/td\u003e\n\u003ctd\u003ehigh\u003c/td\u003e\n\u003ctd\u003e178.426M items/s\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003eCHAOS_PRNG_XOROSHIRO1024STAR\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003euint64_t\u003c/td\u003e\n\u003ctd\u003euint64_t\u003c/td\u003e\n\u003ctd\u003e2\u003csup\u003e1024\u003c/sup\u003e\u003c/td\u003e\n\u003ctd\u003ehigh\u003c/td\u003e\n\u003ctd\u003e165.289M items/s\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003eCHAOS_PRNG_XORSHF96\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003euint32_t [3]\u003c/td\u003e\n\u003ctd\u003euint32_t\u003c/td\u003e\n\u003ctd\u003e2\u003csup\u003e96\u003c/sup\u003e - 1\u003c/td\u003e\n\u003ctd\u003ehigh\u003c/td\u003e\n\u003ctd\u003e185.148M items/s\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eSTL Comparison\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eLibrary competes with PRNGs \u003ca href=\"http://en.cppreference.com/w/cpp/numeric/random\" rel=\"nofollow\"\u003efrom standard library\u003c/a\u003e. Benchmarks \u003ca href=\"https://github.com/maciejczyzewski/libchaos/blob/master/tests/b_generators.cc#L68\"\u003econfirms\u003c/a\u003e that libchaos is faster and offers more...\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"Benchmark Time CPU Iterations Speed (Travis)\n-------------------------------------------------------------------------------------------------------\nB__STL_MINSTD_RAND__Next 333 us 333 us 2108 1.46467GB/s 46.8694M items/s\nB__STL_MT19937__Next 229 us 229 us 3074 2.13247GB/s 68.239M items/s\nB__STL_MT19937_64__Next 260 us 260 us 2683 1.87711GB/s 60.0674M items/s\nB__STL_RANLUX24__Next 2326 us 2327 us 295 214.828MB/s 6.71339M items/s\nB__STL_RANLUX48__Next 118524 us 118598 us 6 67.4546MB/s 2.10796M items/s\nB__STL_KNUTH_B__Next 1083 us 1084 us 641 461.418MB/s 14.4193M items/s\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003eBenchmark Time CPU Iterations Speed (Travis)\n-------------------------------------------------------------------------------------------------------\nB__STL_MINSTD_RAND__Next 333 us 333 us 2108 1.46467GB/s 46.8694M items/s\nB__STL_MT19937__Next 229 us 229 us 3074 2.13247GB/s 68.239M items/s\nB__STL_MT19937_64__Next 260 us 260 us 2683 1.87711GB/s 60.0674M items/s\nB__STL_RANLUX24__Next 2326 us 2327 us 295 214.828MB/s 6.71339M items/s\nB__STL_RANLUX48__Next 118524 us 118598 us 6 67.4546MB/s 2.10796M items/s\nB__STL_KNUTH_B__Next 1083 us 1084 us 641 461.418MB/s 14.4193M items/s\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eInstallation\u003c/h1\u003e\u003ca id=\"user-content-installation\" class=\"anchor\" aria-label=\"Permalink: Installation\" href=\"#installation\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe library needs a C++ compiler that supports C++11. You will need \u003cem\u003eg++ 4.7\u003c/em\u003e or newer to get started, so be sure to have an up-to-date compiler.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eTODO.\u003c/strong\u003e Add this library to \u003ca href=\"http://brew.sh/\" rel=\"nofollow\"\u003eHomebrew\u003c/a\u003e. Then simply \u003ccode\u003e$ brew install libchaos\u003c/code\u003e to install this package on OS X. This is an idea for the future, to be realized when the library has a stable version.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBasic Installation\u003c/h2\u003e\u003ca id=\"user-content-basic-installation\" class=\"anchor\" aria-label=\"Permalink: Basic Installation\" href=\"#basic-installation\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ git clone git@github.com:maciejczyzewski/libchaos.git\n$ cd libchaos \u0026amp;\u0026amp; ./install.sh\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ git clone git@github.com:maciejczyzewski/libchaos.git\n$ cd libchaos \u0026amp;\u0026amp; ./install.sh\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eManual Installation\u003c/h2\u003e\u003ca id=\"user-content-manual-installation\" class=\"anchor\" aria-label=\"Permalink: Manual Installation\" href=\"#manual-installation\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWe welcome patches. If you plan to contribute a patch, you need to build library and its own tests, which has further requirements:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/google/googletest\"\u003eGoogle Test\u003c/a\u003e and \u003ca href=\"https://github.com/google/benchmark\"\u003eGoogle Benchmark\u003c/a\u003e (automatically downloaded as submodule)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://cmake.org/\" rel=\"nofollow\"\u003eCMake\u003c/a\u003e in version \u003cem\u003e2.8.7\u003c/em\u003e (library uses \u003ca href=\"http://www.stroustrup.com/C++11FAQ.html\" rel=\"nofollow\"\u003eC++11\u003c/a\u003e)\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ git clone --recursive git@github.com:maciejczyzewski/libchaos.git\n$ mkdir libchaos/build \u0026amp;\u0026amp; cd \u0026quot;$_\u0026quot;\n$ cmake -DLIBCHAOS_ENABLE_TESTING=ON ..\n$ make \u0026amp;\u0026amp; make install\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ git clone --recursive git@github.com:maciejczyzewski/libchaos.git\n$ mkdir libchaos/build \u0026amp;\u0026amp; cd \"$_\"\n$ cmake -DLIBCHAOS_ENABLE_TESTING=ON ..\n$ make \u0026amp;\u0026amp; make install\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eUninstalling Library\u003c/h2\u003e\u003ca id=\"user-content-uninstalling-library\" class=\"anchor\" aria-label=\"Permalink: Uninstalling Library\" href=\"#uninstalling-library\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eCMake creates a file called \u003ccode\u003einstall_manifest.txt\u003c/code\u003e when executing the install target. This contains a list of all installed files.\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ make uninstall # where is install_manifest.txt\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ make uninstall # where is install_manifest.txt\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eUser Guide\u003c/h1\u003e\u003ca id=\"user-content-user-guide\" class=\"anchor\" aria-label=\"Permalink: User Guide\" href=\"#user-guide\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThis page gives a good introduction to libchaos. It assumes you already have library installed. If you do not, head over to the \u003ca href=\"#installation\"\u003einstallation\u003c/a\u003e section. More complicated examples are in \u003ca href=\"https://github.com/maciejczyzewski/libchaos/tree/master/examples\"\u003e\u003ccode\u003eexamples/\u003c/code\u003e directory\u003c/a\u003e.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eWarning.\u003c/strong\u003e This project is at an early stage of development. The list of core features is not ready. Only main modules are documented. If you have some ideas, feel free to contribute.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eStructure\u003c/h2\u003e\u003ca id=\"user-content-structure\" class=\"anchor\" aria-label=\"Permalink: Structure\" href=\"#structure\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eDirectory structure and contents:\u003c/p\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDirectory\u003c/th\u003e\n\u003cth\u003ePurpose\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003edeps/\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003eContains non-installed 3rd-party code that library depends on.\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003ecmake/\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003eMiscellaneous helper code.\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003einclude/chaos/engines/\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003eImplementations of chaos machines.\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003einclude/chaos/generators/\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003eImplementations of pseudo-random number generators.\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003einclude/chaos/\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003eCore library abstractions.\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003etests\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003eBenchmarks and tests (using \u003ca href=\"https://github.com/google/googletest\"\u003eGoogle Test\u003c/a\u003e and \u003ca href=\"https://github.com/google/benchmark\"\u003eGoogle Benchmark\u003c/a\u003e).\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eAlgorithms\u003c/h2\u003e\u003ca id=\"user-content-algorithms\" class=\"anchor\" aria-label=\"Permalink: Algorithms\" href=\"#algorithms\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eList of implemented algorithms is in the \u003ca href=\"https://github.com/maciejczyzewski/libchaos/blob/master/ALGORITHMS\"\u003e\u003ccode\u003eALGORITHMS\u003c/code\u003e\u003c/a\u003e file.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"CHAOS_MACHINE_* gen; // @1: for CMs\nCHAOS_PRNG_* gen; // @2: for PRNGS\"\u003e\u003cpre\u003eCHAOS_MACHINE_* gen; \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @1: for CMs\u003c/span\u003e\nCHAOS_PRNG_* gen; \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @2: for PRNGS\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eChaos Machines\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eSettings:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"gen.set_time(4); // time parameter\ngen.set_space(1000); // memory parameter (period length)\n // initial secret key\ngen.set_key({0x84242f96eca9c41d, 0xa3c65b8776f96855, 0x5b34a39f070b5837,\n 0x4489affce4f31a1e, 0x2ffeeb0a48316f40, 0xdc2d9891fe68c022,\n 0x3659132bb12fea70, 0xaac17d8efa43cab8, 0xc4cb815590989b13,\n 0x5ee975283d71c93b, 0x691548c86c1bd540, 0x7910c41d10a1e6a5,\n 0x0b5fc64563b3e2a8, 0x047f7684e9fc949d, 0xb99181f2d8f685ca});\"\u003e\u003cpre\u003egen.set_time(\u003cspan class=\"pl-c1\"\u003e4\u003c/span\u003e); \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e time parameter\u003c/span\u003e\ngen.set_space(\u003cspan class=\"pl-c1\"\u003e1000\u003c/span\u003e); \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e memory parameter (period length)\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e initial secret key\u003c/span\u003e\ngen.set_key({\u003cspan class=\"pl-c1\"\u003e0x84242f96eca9c41d\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e0xa3c65b8776f96855\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e0x5b34a39f070b5837\u003c/span\u003e,\n \u003cspan class=\"pl-c1\"\u003e0x4489affce4f31a1e\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e0x2ffeeb0a48316f40\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e0xdc2d9891fe68c022\u003c/span\u003e,\n \u003cspan class=\"pl-c1\"\u003e0x3659132bb12fea70\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e0xaac17d8efa43cab8\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e0xc4cb815590989b13\u003c/span\u003e,\n \u003cspan class=\"pl-c1\"\u003e0x5ee975283d71c93b\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e0x691548c86c1bd540\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e0x7910c41d10a1e6a5\u003c/span\u003e,\n \u003cspan class=\"pl-c1\"\u003e0x0b5fc64563b3e2a8\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e0x047f7684e9fc949d\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e0xb99181f2d8f685ca\u003c/span\u003e});\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eFor pushing a blob:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"gen.push(a); // @1: using function (fastest)\ngen \u0026lt;\u0026lt; a; // @2: using operator\"\u003e\u003cpre\u003egen.push(a); \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @1: using function (fastest)\u003c/span\u003e\ngen \u0026lt;\u0026lt; a; \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @2: using operator\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eFor getting a block:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"gen.pull(); // @1: using function (fastest)\ngen \u0026gt;\u0026gt; a; // @2: using operator\ngen(); // @3: STL style (for API)\"\u003e\u003cpre\u003egen.pull(); \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @1: using function (fastest)\u003c/span\u003e\ngen \u0026gt;\u0026gt; a; \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @2: using operator\u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003egen\u003c/span\u003e(); \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @3: STL style (for API)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eFor clearing to initial state:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"gen.reset();\"\u003e\u003cpre\u003egen.reset();\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003ePseudo-Random Number Generators\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eFor seeding:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"gen.seed(a); // @1: using function (fastest)\ngen \u0026lt;\u0026lt; a; // @2: using operator\"\u003e\u003cpre\u003egen.seed(a); \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @1: using function (fastest)\u003c/span\u003e\ngen \u0026lt;\u0026lt; a; \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @2: using operator\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eFor getting a number:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"gen.next(); // @1: using function (fastest)\ngen \u0026gt;\u0026gt; a; // @2: using operator\ngen(); // @3: STL style (for API)\"\u003e\u003cpre\u003egen.next(); \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @1: using function (fastest)\u003c/span\u003e\ngen \u0026gt;\u0026gt; a; \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @2: using operator\u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003egen\u003c/span\u003e(); \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e @3: STL style (for API)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003ePassword Salting\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eFor salting passwords:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"std::string hash =\n chaos::password\u0026lt;\n CHAOS_MACHINE_XORRING64, // machine algorithm\n time_parameter, // computational consumption\n space_parameter, // memory required/space-hardness\n output_size // length of hashed password\n \u0026gt;(password, salt);\"\u003e\u003cpre\u003estd::string hash =\n chaos::password\u0026lt;\n CHAOS_MACHINE_XORRING64, \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e machine algorithm\u003c/span\u003e\n time_parameter, \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e computational consumption\u003c/span\u003e\n space_parameter, \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e memory required/space-hardness\u003c/span\u003e\n output_size \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e length of hashed password\u003c/span\u003e\n \u0026gt;(password, salt);\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eExample usage:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"std::string hash = chaos::password\u0026lt;CHAOS_MACHINE_XORRING64, 200, 50, 40\u0026gt;(\n \u0026quot;some secret password\u0026quot;, \u0026quot;my private salt\u0026quot;);\n// hash == \u0026quot;C6EB731977A6CB785196BAF11CA8BEC02CDEAFE8\u0026quot;\"\u003e\u003cpre\u003estd::string hash = chaos::password\u0026lt;CHAOS_MACHINE_XORRING64, \u003cspan class=\"pl-c1\"\u003e200\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e50\u003c/span\u003e, \u003cspan class=\"pl-c1\"\u003e40\u003c/span\u003e\u0026gt;(\n \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003esome secret password\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e, \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003emy private salt\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e);\n\u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e hash == \"C6EB731977A6CB785196BAF11CA8BEC02CDEAFE8\"\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eContributing\u003c/h1\u003e\u003ca id=\"user-content-contributing\" class=\"anchor\" aria-label=\"Permalink: Contributing\" href=\"#contributing\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eHave you ever been fascinated by chaotic maps, fractals or something connected with disorder or randomness? Join us or support by sharing!\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp dir=\"auto\"\u003eOur work flow is a \u003ca href=\"https://guides.github.com/introduction/flow/index.html\"\u003etypical GitHub flow\u003c/a\u003e, where contributors fork the \u003ca href=\"https://github.com/maciejczyzewski/libchaos\"\u003elibchaos repository\u003c/a\u003e, make their changes on branch, and submit a \u003ca href=\"https://help.github.com/articles/using-pull-requests\"\u003ePull Request\u003c/a\u003e (a.k.a. \"PR\"). Pull requests should usually be targeted at the \u003ccode\u003emaster\u003c/code\u003e branch.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003ePlease include a nice description of your changes when you submit your PR; if we have to read the whole diff to figure out why you're contributing, you're less likely to get feedback and have your change merged in. Life will be a lot easier for us if you follow this pattern (i.e. fork, named branch, submit PR). If you use your fork's \u003ccode\u003emaster\u003c/code\u003e branch directly, things can get messy.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eBefore wrapping up a PR, you should be sure to:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eWrite tests to cover any functional changes.\u003c/li\u003e\n\u003cli\u003eUpdate documentation for any changed public APIs.\u003c/li\u003e\n\u003cli\u003eAdd to the \u003ca href=\"https://raw.githubusercontent.com/maciejczyzewski/libchaos/master/CHANGELOG.md\" rel=\"nofollow\"\u003eCHANGELOG.md\u003c/a\u003e file information describing any major changes.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eTesting \u0026amp; Benchmarking\u003c/h2\u003e\u003ca id=\"user-content-testing--benchmarking\" class=\"anchor\" aria-label=\"Permalink: Testing \u0026amp; Benchmarking\" href=\"#testing--benchmarking\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eTo execute tests you need to build library manualy with option \u003ccode\u003e-DLIBCHAOS_ENABLE_TESTING=ON\u003c/code\u003e.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"tests/\n - b_\u0026lt;filename\u0026gt;.cc # for benchmarking | BENCHMARK(TEST_NAME)\n - t_\u0026lt;filename\u0026gt;.cc # for testing | TEST(TEST_NAME, CASE_NAME)\"\u003e\u003cpre\u003etests/\n - b_\u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003efilename\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e.cc \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e#\u003c/span\u003e for benchmarking | BENCHMARK(TEST_NAME)\u003c/span\u003e\n - t_\u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003efilename\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e.cc \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e#\u003c/span\u003e for testing | TEST(TEST_NAME, CASE_NAME)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eAfter \u003ccode\u003emake build\u003c/code\u003e, repository should contains programs named as: \u003ccode\u003ebchaos\u003c/code\u003e and \u003ccode\u003etchaos\u003c/code\u003e (separately for benchmark and test), because tests are \u003cem\u003erequired\u003c/em\u003e while benchmarks are \u003cem\u003eoptional\u003c/em\u003e.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eFuture Ideas\u003c/h2\u003e\u003ca id=\"user-content-future-ideas\" class=\"anchor\" aria-label=\"Permalink: Future Ideas\" href=\"#future-ideas\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIf you are starting to work on a particular area, feel free to submit a PR that highlights your work in progress (and note in the PR title that it's not ready to merge). These early PRs are welcome and will help in getting visibility for your fix, allow others to comment early on the changes and also let others know that you are currently working on something.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eLicense\u003c/h1\u003e\u003ca id=\"user-content-license\" class=\"anchor\" aria-label=\"Permalink: License\" href=\"#license\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eSee \u003ca href=\"https://github.com/maciejczyzewski/libchaos/blob/master/LICENSE\"\u003e\u003ccode\u003eLICENSE\u003c/code\u003e\u003c/a\u003e file in this repository.\u003c/p\u003e\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"Features","anchor":"features","htmlText":"Features"},{"level":1,"text":"Overview","anchor":"overview","htmlText":"Overview"},{"level":2,"text":"Chaos Machines (theory/pdf)","anchor":"chaos-machines-theorypdf","htmlText":"Chaos Machines (theory/pdf)"},{"level":2,"text":"Pseudo-Random Number Generators","anchor":"pseudo-random-number-generators","htmlText":"Pseudo-Random Number Generators"},{"level":1,"text":"Installation","anchor":"installation","htmlText":"Installation"},{"level":2,"text":"Basic Installation","anchor":"basic-installation","htmlText":"Basic Installation"},{"level":2,"text":"Manual Installation","anchor":"manual-installation","htmlText":"Manual Installation"},{"level":2,"text":"Uninstalling Library","anchor":"uninstalling-library","htmlText":"Uninstalling Library"},{"level":1,"text":"User Guide","anchor":"user-guide","htmlText":"User Guide"},{"level":2,"text":"Structure","anchor":"structure","htmlText":"Structure"},{"level":2,"text":"Algorithms","anchor":"algorithms","htmlText":"Algorithms"},{"level":1,"text":"Contributing","anchor":"contributing","htmlText":"Contributing"},{"level":2,"text":"Testing \u0026 Benchmarking","anchor":"testing--benchmarking","htmlText":"Testing \u0026amp; Benchmarking"},{"level":2,"text":"Future Ideas","anchor":"future-ideas","htmlText":"Future Ideas"},{"level":1,"text":"License","anchor":"license","htmlText":"License"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fmaciejczyzewski%2Flibchaos"}},{"displayName":"LICENSE","repoName":"libchaos","refName":"master","path":"LICENSE","preferredFileType":"license","tabName":"License","richText":null,"loaded":false,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":null,"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fmaciejczyzewski%2Flibchaos"}}],"overviewFilesProcessingTime":0}},"appPayload":{"helpUrl":"https://docs.github.com","findFileWorkerPath":"/assets-cdn/worker/find-file-worker-7d7eb7c71814.js","findInFileWorkerPath":"/assets-cdn/worker/find-in-file-worker-708ec8ade250.js","githubDevUrl":null,"enabled_features":{"copilot_workspace":null,"code_nav_ui_events":false,"overview_shared_code_dropdown_button":false,"react_blob_overlay":false,"accessible_code_button":true,"github_models_repo_integration":false}}}}</script> <div 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js-snippet-clipboard-copy-unpositioned undefined" data-hpc="true"><article class="markdown-body entry-content container-lg" itemprop="text"><a href="https://github.com/maciejczyzewski/libchaos"> <img src="https://camo.githubusercontent.com/5c349e377afba6134c8b6816be678b0afe6bdda7340629b112f3f308374dce26/687474703a2f2f6d616369656a637a797a6577736b692e6d652f6c69626368616f732f5f7374617469632f6c69626368616f732e737667" alt="libchaos" title="libchaos" align="right" width="100" height="100" data-canonical-src="http://maciejczyzewski.me/libchaos/_static/libchaos.svg" style="max-width: 100%;"> </a> [![Current Release](<a href="https://img.shields.io/github/release/maciejczyzewski/libchaos.svg)](https://github.com/maciejczyzewski/libchaos/releases" rel="nofollow">https://img.shields.io/github/release/maciejczyzewski/libchaos.svg)](https://github.com/maciejczyzewski/libchaos/releases</a>) [![Build Status](<a href="https://travis-ci.org/maciejczyzewski/libchaos.svg?branch=master)](https://travis-ci.org/maciejczyzewski/libchaos" rel="nofollow">https://travis-ci.org/maciejczyzewski/libchaos.svg?branch=master)](https://travis-ci.org/maciejczyzewski/libchaos</a>) <p dir="auto"><a href="#features">Features</a> | <a href="#overview">Overview</a> | <a href="#installation">Installation</a> | <a href="#user-guide">User Guide</a> | <a href="#contributing">Contributing</a> | <a href="#license">License</a></p> <p dir="auto"><strong>Got a question?</strong> Join us on <a href="http://stackoverflow.com/questions/tagged/libchaos" rel="nofollow">stackoverflow</a> or chat on <a href="https://webchat.freenode.net/?channels=#libchaos" rel="nofollow">IRC</a>.</p> <p dir="auto"><em>Advanced library for randomization, hashing and statistical analysis (devoted to <a href="https://en.wikipedia.org/wiki/Chaos_machine" rel="nofollow">chaos machines</a>).</em></p> <hr> <p dir="auto">Libchaos is a computing library written in the C++ language to help with the development of software for scientific research. The library tries to be as general as possible, modern and easy-to-use.</p> <p dir="auto">Project goal is to <em>implement & analyze</em> various algorithms for randomization and hashing, while maintaining simplicity and security, making them suitable for use in your own code. Popular tools like <a href="http://simul.iro.umontreal.ca/testu01/tu01.html" rel="nofollow">TestU01</a>, <a href="https://www.phy.duke.edu/~rgb/General/dieharder.php" rel="nofollow">Dieharder</a> and <a href="https://github.com/jessek/hashdeep">Hashdeep</a> are obsolete or their development has been stopped. Libchaos aims to replace them.</p> <hr> <p dir="auto">The library implements wide range of <a href="#chaos-machines-theorypdf">chaos machines</a>, which present the idea of creating a universal scheme with modular design and customizable parameters, which can be applied wherever <em>randomness</em> and <em>sensitiveness</em> is needed (pseudo-random oracle).</p> <div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="std::string hash = chaos::password<CHAOS_MACHINE_XORRING64, 500, 50, 95>("my password", "private salt"); // hash == "EA79560A7E0937EC66BDBE22EAFDC96AA5D7AFE4E970C3C856B7D92632EAA8EEC828E61E59E024922F58D4045BC053E""><pre>std::string hash = chaos::password<CHAOS_MACHINE_XORRING64, <span class="pl-c1">500</span>, <span class="pl-c1">50</span>, <span class="pl-c1">95</span>>(<span class="pl-s"><span class="pl-pds">"</span>my password<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>private salt<span class="pl-pds">"</span></span>); <span class="pl-c"><span class="pl-c">//</span> hash == "EA79560A7E0937EC66BDBE22EAFDC96AA5D7AFE4E970C3C856B7D92632EAA8EEC828E61E59E024922F58D4045BC053E"</span></pre></div> <p dir="auto">It turns out that a pseudo-random function can be easily enriched by a <a href="https://en.wikipedia.org/wiki/Chaos_theory" rel="nofollow">chaotic system</a>, creating something completely new. What's interesting is that this scheme allows specification by three parameters: <em>execution time</em>, <em>period/memory required</em>, <em>initial secret key</em>.</p> <hr> <p dir="auto"><strong>Getting Help</strong></p> <p dir="auto">If you have questions about the library, please be sure to check out the <a href="#">API documentation</a>. If you still have questions, reach out to us on <a href="https://webchat.freenode.net/?channels=#libchaos" rel="nofollow">IRC</a> or post a question on <a href="http://stackoverflow.com/questions/tagged/libchaos" rel="nofollow">stackoverflow</a> (using the <code>libchaos</code> tag).</p> <p dir="auto"><strong>Reporting Bugs</strong></p> <p dir="auto">Please open a <a href="https://github.com/maciejczyzewski/libchaos/issues">GitHub Issue</a> and include as much information as you can. If possible, provide sample code that illustrates the problem you're reporting. If you're seeing a bug only on a specific repository, please provide a link to it if possible.</p> <p dir="auto"><em>Do not open a GitHub Issue for help, only for bug reports.</em></p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Features</h1><a id="user-content-features" class="anchor" aria-label="Permalink: Features" href="#features"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <markdown-accessiblity-table><table width="100%"> <tbody><tr> <th width="30%">Ready</th> <th width="30%">In Progress</th> <th width="30%">TODO</th> </tr> <tr> <td>Chaos machines</td> <td>Statistical tests & functions</td> <td>Entropy pools (different seeding scenarios)</td> </tr> <tr> <td>Pseudo-random number generators</td> <td>Adapter for truely random generators (dynamical reseeding)</td> <td>Gnuplot/R utilities & analysis</td> </tr> <tr> <td>Signatures for algorithms (portability on various architectures)</td> <td>Ranking for algorithms (speed/quality)</td> <td>Javascript API</td> </tr> <tr> <td>STL compatibility</td> <td>Hashdeep fork (named chaosdeep)</td> <td>Seed recovery (attacks)</td> </tr> </tbody></table></markdown-accessiblity-table> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Overview</h1><a id="user-content-overview" class="anchor" aria-label="Permalink: Overview" href="#overview"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/2e209afa5fc08d5715331ca0967a326a78869c7366a9fd2455af944cf6a35111/687474703a2f2f6d616369656a637a797a6577736b692e6d652f6c69626368616f732f5f696d616765732f62656e63686d61726b2e737667"><img src="https://camo.githubusercontent.com/2e209afa5fc08d5715331ca0967a326a78869c7366a9fd2455af944cf6a35111/687474703a2f2f6d616369656a637a797a6577736b692e6d652f6c69626368616f732f5f696d616765732f62656e63686d61726b2e737667" alt="benchmark" data-canonical-src="http://maciejczyzewski.me/libchaos/_images/benchmark.svg" style="max-width: 100%;"></a></p> <p dir="auto">Each software problem requires different tools and algorithms to solve it effectively and achieve best results. <em>Engineer's problem is how to decide which method will suit his needs best.</em></p> <p dir="auto"></p><markdown-accessiblity-table><table width="100%"> <tbody><tr> <th width="50%">Example</th> <th width="50%">Instructions</th> </tr> <tr> <td><pre>#include <iostream> #include <chaos.h> // library header <p dir="auto">// initialize chaos machine (64-bit version) CHAOS_MACHINE_XORRING64 machine;</p> <p dir="auto">int main(void) { machine.set_space(100000); // 2^6400000 period length machine.push(0x8a5cd789635d2dff); // add some data machine.push(0x284600e3f30e38c3); // and other... while (true) putc_unlocked(machine.pull(), stdout); }</p></pre></td> <td> Just copy, paste it into new file and prompt: <p dir="auto"><br><br></p><pre>$ g++ -std=c++11 -lchaos example.cc $ ./a.out | xxd -l 1024</pre><p dir="auto"></p> <p dir="auto">See it run! Have fun.</p> </td> </tr> </tbody></table></markdown-accessiblity-table> <p dir="auto">This project offers very convenient interface for practical use, not just research. In the next section, there is a list of recommended algorithms and their strengths, period lengths, and speeds.</p> <p dir="auto"></p><markdown-accessiblity-table><table width="100%"> <tbody><tr> <th width="50%">Example</th> <th width="50%">Instructions</th> </tr> <tr> <td><pre>#include <iostream> #include <chaos.h> // library header <p dir="auto">// initialize PRNG (by Sebastiano Vigna) CHAOS_PRNG_XOROSHIRO1024STAR prng;</p> <p dir="auto">int main(void) { prng.seed(0x8a5cd789635d2dff); // initialize with seed while (true) putc_unlocked(prng.next(), stdout); }</p></pre></td> <td> Notice that you can use <code>CHAOS_PRNG_*</code> and <code>CHAOS_MACHINE_*</code> algorithms. See the table below and read the library user guide to understand the difference. </td> </tr> </tbody></table></markdown-accessiblity-table> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Chaos Machines <a href="https://eprint.iacr.org/2016/468" rel="nofollow">(theory/pdf)</a></h2><a id="user-content-chaos-machines-theorypdf" class="anchor" aria-label="Permalink: Chaos Machines (theory/pdf)" href="#chaos-machines-theorypdf"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">In mathematics, a chaos machine is a class of algorithms constructed on the base of chaos theory (mainly deterministic chaos) to produce <strong>pseudo-random oracle</strong>. It was designed specifically to combine the benefits of <em>hash function</em> and <em>pseudo-random function</em>.</p> <markdown-accessiblity-table><table width="100%"> <tbody><tr> <th rowspan="2" width="100%">Name</th> <th rowspan="2">Input</th> <th rowspan="2">Output</th> <th rowspan="2">Period</th> <th rowspan="2">Quality</th> <th colspan="2">Speed</th> </tr> <tr> <th>Push</th><th>Pull</th> </tr> <tr> <td><code>CHAOS_MACHINE_NCG</code> proof of concept</td> <td>uint32_t</td> <td>uint32_t</td> <td>(2<sup>16n</sup>,2<sup>32n</sup>)</td> <td>high</td> <td>4.38007M<br>items/s</td> <td>3.49098M<br>items/s</td> </tr> <tr> <td><code>CHAOS_MACHINE_XORRING32</code></td> <td>uint32_t</td> <td>uint32_t</td> <td>2<sup>32n</sup></td> <td>high</td> <td>33.0828M<br>items/s</td> <td>48.938M<br>items/s</td> </tr> <tr> <td><code>CHAOS_MACHINE_XORRING64</code></td> <td>uint64_t</td> <td>uint64_t</td> <td>2<sup>64n</sup></td> <td>high</td> <td>31.6051M<br>items/s</td> <td>41.6355M<br>items/s</td> </tr> </tbody></table></markdown-accessiblity-table> <p dir="auto">Machines can be used to implement many cryptographic primitives, including cryptographic hashes, message authentication codes and randomness extractors.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Pseudo-Random Number Generators</h2><a id="user-content-pseudo-random-number-generators" class="anchor" aria-label="Permalink: Pseudo-Random Number Generators" href="#pseudo-random-number-generators"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">PRNGs are algorithms for <strong>generating a sequence of numbers</strong> whose properties approximate the properties of sequences of random numbers. Generated sequence is <strong>not truly random</strong>, because it is completely determined by a relatively small set of initial values, called the seed.</p> <markdown-accessiblity-table><table width="100%"> <tbody><tr> <th width="30%">Name</th> <th>Seed</th> <th>Output</th> <th>Period</th> <th>Quality</th> <th>Speed</th> </tr> <tr> <td><code>CHAOS_PRNG_KISS</code></td> <td>uint32_t [2]</td> <td>uint32_t</td> <td>2<sup>119.5</sup></td> <td>high</td> <td>99.9175M items/s</td> </tr> <tr> <td><code>CHAOS_PRNG_ABYSSINIAN</code></td> <td>uint32_t [2]</td> <td>uint32_t</td> <td>2<sup>126</sup></td> <td>high</td> <td>165.754M items/s</td> </tr> <tr> <td><code>CHAOS_PRNG_XOROSHIRO128PLUS</code></td> <td>uint64_t</td> <td>uint64_t</td> <td>2<sup>128</sup></td> <td>high</td> <td>178.426M items/s</td> </tr> <tr> <td><code>CHAOS_PRNG_XOROSHIRO1024STAR</code></td> <td>uint64_t</td> <td>uint64_t</td> <td>2<sup>1024</sup></td> <td>high</td> <td>165.289M items/s</td> </tr> <tr> <td><code>CHAOS_PRNG_XORSHF96</code></td> <td>uint32_t [3]</td> <td>uint32_t</td> <td>2<sup>96</sup> - 1</td> <td>high</td> <td>185.148M items/s</td> </tr> </tbody></table></markdown-accessiblity-table> <p dir="auto"><strong>STL Comparison</strong></p> <p dir="auto">Library competes with PRNGs <a href="http://en.cppreference.com/w/cpp/numeric/random" rel="nofollow">from standard library</a>. Benchmarks <a href="https://github.com/maciejczyzewski/libchaos/blob/master/tests/b_generators.cc#L68">confirms</a> that libchaos is faster and offers more...</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="Benchmark Time CPU Iterations Speed (Travis) ------------------------------------------------------------------------------------------------------- B__STL_MINSTD_RAND__Next 333 us 333 us 2108 1.46467GB/s 46.8694M items/s B__STL_MT19937__Next 229 us 229 us 3074 2.13247GB/s 68.239M items/s B__STL_MT19937_64__Next 260 us 260 us 2683 1.87711GB/s 60.0674M items/s B__STL_RANLUX24__Next 2326 us 2327 us 295 214.828MB/s 6.71339M items/s B__STL_RANLUX48__Next 118524 us 118598 us 6 67.4546MB/s 2.10796M items/s B__STL_KNUTH_B__Next 1083 us 1084 us 641 461.418MB/s 14.4193M items/s"><pre class="notranslate"><code>Benchmark Time CPU Iterations Speed (Travis) ------------------------------------------------------------------------------------------------------- B__STL_MINSTD_RAND__Next 333 us 333 us 2108 1.46467GB/s 46.8694M items/s B__STL_MT19937__Next 229 us 229 us 3074 2.13247GB/s 68.239M items/s B__STL_MT19937_64__Next 260 us 260 us 2683 1.87711GB/s 60.0674M items/s B__STL_RANLUX24__Next 2326 us 2327 us 295 214.828MB/s 6.71339M items/s B__STL_RANLUX48__Next 118524 us 118598 us 6 67.4546MB/s 2.10796M items/s B__STL_KNUTH_B__Next 1083 us 1084 us 641 461.418MB/s 14.4193M items/s </code></pre></div> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Installation</h1><a id="user-content-installation" class="anchor" aria-label="Permalink: Installation" href="#installation"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">The library needs a C++ compiler that supports C++11. You will need <em>g++ 4.7</em> or newer to get started, so be sure to have an up-to-date compiler.</p> <blockquote> <p dir="auto"><strong>TODO.</strong> Add this library to <a href="http://brew.sh/" rel="nofollow">Homebrew</a>. Then simply <code>$ brew install libchaos</code> to install this package on OS X. This is an idea for the future, to be realized when the library has a stable version.</p> </blockquote> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Basic Installation</h2><a id="user-content-basic-installation" class="anchor" aria-label="Permalink: Basic Installation" href="#basic-installation"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ git clone git@github.com:maciejczyzewski/libchaos.git $ cd libchaos && ./install.sh"><pre class="notranslate"><code>$ git clone git@github.com:maciejczyzewski/libchaos.git $ cd libchaos && ./install.sh </code></pre></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Manual Installation</h2><a id="user-content-manual-installation" class="anchor" aria-label="Permalink: Manual Installation" href="#manual-installation"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">We welcome patches. If you plan to contribute a patch, you need to build library and its own tests, which has further requirements:</p> <ul dir="auto"> <li><a href="https://github.com/google/googletest">Google Test</a> and <a href="https://github.com/google/benchmark">Google Benchmark</a> (automatically downloaded as submodule)</li> <li><a href="https://cmake.org/" rel="nofollow">CMake</a> in version <em>2.8.7</em> (library uses <a href="http://www.stroustrup.com/C++11FAQ.html" rel="nofollow">C++11</a>)</li> </ul> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ git clone --recursive git@github.com:maciejczyzewski/libchaos.git $ mkdir libchaos/build && cd "$_" $ cmake -DLIBCHAOS_ENABLE_TESTING=ON .. $ make && make install"><pre class="notranslate"><code>$ git clone --recursive git@github.com:maciejczyzewski/libchaos.git $ mkdir libchaos/build && cd "$_" $ cmake -DLIBCHAOS_ENABLE_TESTING=ON .. $ make && make install </code></pre></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Uninstalling Library</h2><a id="user-content-uninstalling-library" class="anchor" aria-label="Permalink: Uninstalling Library" href="#uninstalling-library"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">CMake creates a file called <code>install_manifest.txt</code> when executing the install target. This contains a list of all installed files.</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ make uninstall # where is install_manifest.txt"><pre class="notranslate"><code>$ make uninstall # where is install_manifest.txt </code></pre></div> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">User Guide</h1><a id="user-content-user-guide" class="anchor" aria-label="Permalink: User Guide" href="#user-guide"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">This page gives a good introduction to libchaos. It assumes you already have library installed. If you do not, head over to the <a href="#installation">installation</a> section. More complicated examples are in <a href="https://github.com/maciejczyzewski/libchaos/tree/master/examples"><code>examples/</code> directory</a>.</p> <blockquote> <p dir="auto"><strong>Warning.</strong> This project is at an early stage of development. The list of core features is not ready. Only main modules are documented. If you have some ideas, feel free to contribute.</p> </blockquote> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Structure</h2><a id="user-content-structure" class="anchor" aria-label="Permalink: Structure" href="#structure"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Directory structure and contents:</p> <markdown-accessiblity-table><table> <thead> <tr> <th>Directory</th> <th>Purpose</th> </tr> </thead> <tbody> <tr> <td><code>deps/</code></td> <td>Contains non-installed 3rd-party code that library depends on.</td> </tr> <tr> <td><code>cmake/</code></td> <td>Miscellaneous helper code.</td> </tr> <tr> <td><code>include/chaos/engines/</code></td> <td>Implementations of chaos machines.</td> </tr> <tr> <td><code>include/chaos/generators/</code></td> <td>Implementations of pseudo-random number generators.</td> </tr> <tr> <td><code>include/chaos/</code></td> <td>Core library abstractions.</td> </tr> <tr> <td><code>tests</code></td> <td>Benchmarks and tests (using <a href="https://github.com/google/googletest">Google Test</a> and <a href="https://github.com/google/benchmark">Google Benchmark</a>).</td> </tr> </tbody> </table></markdown-accessiblity-table> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Algorithms</h2><a id="user-content-algorithms" class="anchor" aria-label="Permalink: Algorithms" href="#algorithms"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">List of implemented algorithms is in the <a href="https://github.com/maciejczyzewski/libchaos/blob/master/ALGORITHMS"><code>ALGORITHMS</code></a> file.</p> <div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="CHAOS_MACHINE_* gen; // @1: for CMs CHAOS_PRNG_* gen; // @2: for PRNGS"><pre>CHAOS_MACHINE_* gen; <span class="pl-c"><span class="pl-c">//</span> @1: for CMs</span> CHAOS_PRNG_* gen; <span class="pl-c"><span class="pl-c">//</span> @2: for PRNGS</span></pre></div> <p dir="auto"><strong>Chaos Machines</strong></p> <p dir="auto">Settings:</p> <div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="gen.set_time(4); // time parameter gen.set_space(1000); // memory parameter (period length) // initial secret key gen.set_key({0x84242f96eca9c41d, 0xa3c65b8776f96855, 0x5b34a39f070b5837, 0x4489affce4f31a1e, 0x2ffeeb0a48316f40, 0xdc2d9891fe68c022, 0x3659132bb12fea70, 0xaac17d8efa43cab8, 0xc4cb815590989b13, 0x5ee975283d71c93b, 0x691548c86c1bd540, 0x7910c41d10a1e6a5, 0x0b5fc64563b3e2a8, 0x047f7684e9fc949d, 0xb99181f2d8f685ca});"><pre>gen.set_time(<span class="pl-c1">4</span>); <span class="pl-c"><span class="pl-c">//</span> time parameter</span> gen.set_space(<span class="pl-c1">1000</span>); <span class="pl-c"><span class="pl-c">//</span> memory parameter (period length)</span> <span class="pl-c"><span class="pl-c">//</span> initial secret key</span> gen.set_key({<span class="pl-c1">0x84242f96eca9c41d</span>, <span class="pl-c1">0xa3c65b8776f96855</span>, <span class="pl-c1">0x5b34a39f070b5837</span>, <span class="pl-c1">0x4489affce4f31a1e</span>, <span class="pl-c1">0x2ffeeb0a48316f40</span>, <span class="pl-c1">0xdc2d9891fe68c022</span>, <span class="pl-c1">0x3659132bb12fea70</span>, <span class="pl-c1">0xaac17d8efa43cab8</span>, <span class="pl-c1">0xc4cb815590989b13</span>, <span class="pl-c1">0x5ee975283d71c93b</span>, <span class="pl-c1">0x691548c86c1bd540</span>, <span class="pl-c1">0x7910c41d10a1e6a5</span>, <span class="pl-c1">0x0b5fc64563b3e2a8</span>, <span class="pl-c1">0x047f7684e9fc949d</span>, <span class="pl-c1">0xb99181f2d8f685ca</span>});</pre></div> <p dir="auto">For pushing a blob:</p> <div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="gen.push(a); // @1: using function (fastest) gen << a; // @2: using operator"><pre>gen.push(a); <span class="pl-c"><span class="pl-c">//</span> @1: using function (fastest)</span> gen << a; <span class="pl-c"><span class="pl-c">//</span> @2: using operator</span></pre></div> <p dir="auto">For getting a block:</p> <div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="gen.pull(); // @1: using function (fastest) gen >> a; // @2: using operator gen(); // @3: STL style (for API)"><pre>gen.pull(); <span class="pl-c"><span class="pl-c">//</span> @1: using function (fastest)</span> gen >> a; <span class="pl-c"><span class="pl-c">//</span> @2: using operator</span> <span class="pl-en">gen</span>(); <span class="pl-c"><span class="pl-c">//</span> @3: STL style (for API)</span></pre></div> <p dir="auto">For clearing to initial state:</p> <div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="gen.reset();"><pre>gen.reset();</pre></div> <p dir="auto"><strong>Pseudo-Random Number Generators</strong></p> <p dir="auto">For seeding:</p> <div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="gen.seed(a); // @1: using function (fastest) gen << a; // @2: using operator"><pre>gen.seed(a); <span class="pl-c"><span class="pl-c">//</span> @1: using function (fastest)</span> gen << a; <span class="pl-c"><span class="pl-c">//</span> @2: using operator</span></pre></div> <p dir="auto">For getting a number:</p> <div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="gen.next(); // @1: using function (fastest) gen >> a; // @2: using operator gen(); // @3: STL style (for API)"><pre>gen.next(); <span class="pl-c"><span class="pl-c">//</span> @1: using function (fastest)</span> gen >> a; <span class="pl-c"><span class="pl-c">//</span> @2: using operator</span> <span class="pl-en">gen</span>(); <span class="pl-c"><span class="pl-c">//</span> @3: STL style (for API)</span></pre></div> <p dir="auto"><strong>Password Salting</strong></p> <p dir="auto">For salting passwords:</p> <div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="std::string hash = chaos::password< CHAOS_MACHINE_XORRING64, // machine algorithm time_parameter, // computational consumption space_parameter, // memory required/space-hardness output_size // length of hashed password >(password, salt);"><pre>std::string hash = chaos::password< CHAOS_MACHINE_XORRING64, <span class="pl-c"><span class="pl-c">//</span> machine algorithm</span> time_parameter, <span class="pl-c"><span class="pl-c">//</span> computational consumption</span> space_parameter, <span class="pl-c"><span class="pl-c">//</span> memory required/space-hardness</span> output_size <span class="pl-c"><span class="pl-c">//</span> length of hashed password</span> >(password, salt);</pre></div> <p dir="auto">Example usage:</p> <div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="std::string hash = chaos::password<CHAOS_MACHINE_XORRING64, 200, 50, 40>( "some secret password", "my private salt"); // hash == "C6EB731977A6CB785196BAF11CA8BEC02CDEAFE8""><pre>std::string hash = chaos::password<CHAOS_MACHINE_XORRING64, <span class="pl-c1">200</span>, <span class="pl-c1">50</span>, <span class="pl-c1">40</span>>( <span class="pl-s"><span class="pl-pds">"</span>some secret password<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>my private salt<span class="pl-pds">"</span></span>); <span class="pl-c"><span class="pl-c">//</span> hash == "C6EB731977A6CB785196BAF11CA8BEC02CDEAFE8"</span></pre></div> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Contributing</h1><a id="user-content-contributing" class="anchor" aria-label="Permalink: Contributing" href="#contributing"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <blockquote> <p dir="auto">Have you ever been fascinated by chaotic maps, fractals or something connected with disorder or randomness? Join us or support by sharing!</p> </blockquote> <p dir="auto">Our work flow is a <a href="https://guides.github.com/introduction/flow/index.html">typical GitHub flow</a>, where contributors fork the <a href="https://github.com/maciejczyzewski/libchaos">libchaos repository</a>, make their changes on branch, and submit a <a href="https://help.github.com/articles/using-pull-requests">Pull Request</a> (a.k.a. "PR"). Pull requests should usually be targeted at the <code>master</code> branch.</p> <p dir="auto">Please include a nice description of your changes when you submit your PR; if we have to read the whole diff to figure out why you're contributing, you're less likely to get feedback and have your change merged in. Life will be a lot easier for us if you follow this pattern (i.e. fork, named branch, submit PR). If you use your fork's <code>master</code> branch directly, things can get messy.</p> <p dir="auto">Before wrapping up a PR, you should be sure to:</p> <ul dir="auto"> <li>Write tests to cover any functional changes.</li> <li>Update documentation for any changed public APIs.</li> <li>Add to the <a href="https://raw.githubusercontent.com/maciejczyzewski/libchaos/master/CHANGELOG.md" rel="nofollow">CHANGELOG.md</a> file information describing any major changes.</li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Testing & Benchmarking</h2><a id="user-content-testing--benchmarking" class="anchor" aria-label="Permalink: Testing & Benchmarking" href="#testing--benchmarking"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">To execute tests you need to build library manualy with option <code>-DLIBCHAOS_ENABLE_TESTING=ON</code>.</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="tests/ - b_<filename>.cc # for benchmarking | BENCHMARK(TEST_NAME) - t_<filename>.cc # for testing | TEST(TEST_NAME, CASE_NAME)"><pre>tests/ - b_<span class="pl-k"><</span>filename<span class="pl-k">></span>.cc <span class="pl-c"><span class="pl-c">#</span> for benchmarking | BENCHMARK(TEST_NAME)</span> - t_<span class="pl-k"><</span>filename<span class="pl-k">></span>.cc <span class="pl-c"><span class="pl-c">#</span> for testing | TEST(TEST_NAME, CASE_NAME)</span></pre></div> <p dir="auto">After <code>make build</code>, repository should contains programs named as: <code>bchaos</code> and <code>tchaos</code> (separately for benchmark and test), because tests are <em>required</em> while benchmarks are <em>optional</em>.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Future Ideas</h2><a id="user-content-future-ideas" class="anchor" aria-label="Permalink: Future Ideas" href="#future-ideas"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">If you are starting to work on a particular area, feel free to submit a PR that highlights your work in progress (and note in the PR title that it's not ready to merge). These early PRs are welcome and will help in getting visibility for your fix, allow others to comment early on the changes and also let others know that you are currently working on something.</p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">License</h1><a id="user-content-license" class="anchor" aria-label="Permalink: License" href="#license"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 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