https://sylvie.fyi/tools/ Recent content in Tools on sylvie Hugo -- gohugo.io en-us Mon, 03 Feb 2025 20:35:36 -0500 https://sylvie.fyi/tools/kullback/ Mon, 03 Feb 2025 20:35:36 -0500 https://sylvie.fyi/tools/kullback/ <p>This is based on <a href="https://corgi.rip/blog/kullback-in-ctf/">corgo&rsquo;s</a> writeup explaining how the Kullback test can be useful for solving cryptography CTF challenges.</p> <p>I wrote this using WebAssembly, all of the calculations are performed locally in your browser. The source code can be found on <a href="https://github.com/sy1vi3/kullback-wasm">my github</a>.</p> <link rel="stylesheet" href="https://sylvie.fyi/tools/kullback/kullback.css"> <script src="https://sylvie.fyi/tools/kullback/kullback.js"></script> <div class="kullback-container"> <div class="data-input-box"> <div class="input-type-choices"> <span class="input-type-choice selected" onclick="inputTypeChange(this)" value="utf-8">utf-8</span> <span class="input-type-choice" onclick="inputTypeChange(this)" value="hex">hex</span> <span class="input-type-choice" onclick="inputTypeChange(this)" value="base64">base64</span> <span class="input-type-choice" onclick="inputTypeChange(this)" value="binary">binary</span> <span class="input-type-choice file" onclick="inputTypeChange(this)" value="file">file</span> </div> <textarea id="kullback-input" rows="5" cols="50" onkeyup="runKullback()" placeholder="mrrp meow"></textarea> <label for="fileInput" class="file-input-label"><span class="file-label-text"><span class="file-name">choose file</span><br><span class="file-size"></span></span></label> <input type="file" id="fileInput"> <div class="options-collapse closed"><i class="fas fa-caret-right options-icon"></i> options</div> <div class="data-options" style="height: 0px;"> <div class="data-option max-length">max key length: <input type="number" id="maxKeyLengthInput" value="60" onkeyup="reRunTest()"/></div> <div class="data-option ignore-errors">ignore errors: <input type="checkbox" id="ignoreErrors" onclick="reRunTest()"/></div> <div class="data-option show-peaks">show peak labels: <input type="checkbox" id="alwaysOnCheckbox" onclick="reRunTest()"/></div> <div class="data-option label-threshold">peak threshold: <input type="number" id="thInput" value="0.85" onkeyup="reRunTest()"/></div> </div> </div> <canvas id="graphCanvas" onmousemove="onCanvasMouseMove(event)" onmouseleave="onCanvasMouseLeave()" class="hidden"></canvas> </div> <script src="https://sylvie.fyi/tools/kullback/tool.js"></script> <p>This is based on <a href="https://corgi.rip/blog/kullback-in-ctf/">corgo&rsquo;s</a> writeup explaining how the Kullback test can be useful for solving cryptography CTF challenges.</p> <p>I wrote this using WebAssembly, all of the calculations are performed locally in your browser. The source code can be found on <a href="https://github.com/sy1vi3/kullback-wasm">my github</a>.</p> <link rel="stylesheet" href="https://sylvie.fyi/tools/kullback/kullback.css"> <script src="https://sylvie.fyi/tools/kullback/kullback.js"></script> <div class="kullback-container"> <div class="data-input-box"> <div class="input-type-choices"> <span class="input-type-choice selected" onclick="inputTypeChange(this)" value="utf-8">utf-8</span> <span class="input-type-choice" onclick="inputTypeChange(this)" value="hex">hex</span> <span class="input-type-choice" onclick="inputTypeChange(this)" value="base64">base64</span> <span class="input-type-choice" onclick="inputTypeChange(this)" value="binary">binary</span> <span class="input-type-choice file" onclick="inputTypeChange(this)" value="file">file</span> </div> <textarea id="kullback-input" rows="5" cols="50" onkeyup="runKullback()" placeholder="mrrp meow"></textarea> <label for="fileInput" class="file-input-label"><span class="file-label-text"><span class="file-name">choose file</span><br><span class="file-size"></span></span></label> <input type="file" id="fileInput"> <div class="options-collapse closed"><i class="fas fa-caret-right options-icon"></i> options</div> <div class="data-options" style="height: 0px;"> <div class="data-option max-length">max key length: <input type="number" id="maxKeyLengthInput" value="60" onkeyup="reRunTest()"/></div> <div class="data-option ignore-errors">ignore errors: <input type="checkbox" id="ignoreErrors" onclick="reRunTest()"/></div> <div class="data-option show-peaks">show peak labels: <input type="checkbox" id="alwaysOnCheckbox" onclick="reRunTest()"/></div> <div class="data-option label-threshold">peak threshold: <input type="number" id="thInput" value="0.85" onkeyup="reRunTest()"/></div> </div> </div> <canvas id="graphCanvas" onmousemove="onCanvasMouseMove(event)" onmouseleave="onCanvasMouseLeave()" class="hidden"></canvas> </div> <script src="https://sylvie.fyi/tools/kullback/tool.js"></script>