-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathasm-some.html
402 lines (373 loc) · 28 KB
/
asm-some.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="author" content="F3real" />
<meta name="keywords" content="asm,misc" />
<meta name="description" content="Short google brainteaser" />
<title>asm-some - EnSec blog</title>
<link href="https://f3real.github.io/theme/css/combined.css" rel="stylesheet" />
<!-- Feeds -->
</head>
<body data-spy="scroll" data-target="#scrollspy">
<div id="wrapper">
<!-- Sidebar -->
<nav id="sidebar-wrapper-small" class="twitchy-background">
<ul id="accordion-small" class="sidebar-nav sidebar-nav-small">
<li>
<a href="https://f3real.github.io" title="EnSec blog" class="collapsed">
<span class="fas fa-home"></span>
</a>
</li>
<li class="nav-divider"></li>
<li>
<a href="https://f3real.github.io/archives.html" title="Recent Articles" class="collapsed">
<span class="fas fa-th-list"></span>
</a>
</li>
<li class="nav-divider"></li>
<li>
<a data-toggle="collapse" data-parent="#accordion-small" href="#collapse-social-small" title="Social" class="collapsed">
<i class="fas fa-users padding-small"></i>
</a>
</li>
<li class="panel anti-panel"><ul id="collapse-social-small" class="collapse ">
<li>
<a href="https://github.com/F3real" title="Github"><i class="fab fa-github-square padding-small"></i></a>
</li>
<li>
<a href="https://www.linkedin.com/in/stefan-ili%C4%87-61a004111" title="Linkedin"><i class="fab fa-linkedin padding-small"></i></a>
</li>
</ul></li>
<li class="nav-divider"></li>
<li>
<a href="#" title="Back to top" class="collapsed">
<span class="fas fa-arrow-up"></span>
</a>
</li>
</ul>
</nav>
<nav id="sidebar-wrapper" class="twitchy-background">
<ul id="accordion" class="sidebar-nav">
<li class="sidebar-brand">
<a href="https://f3real.github.io/">
<span class="fas fa-home padding-small"></span>
EnSec blog
</a>
</li>
<li>
<a href="https://f3real.github.io/archives.html">
<span class="fas fa-th-list padding-small"></span>
Archives
</a>
</li>
<li class="nav-divider"></li>
<li>
<a data-toggle="collapse" data-parent="#accordion" href="#collapse-social">
<i class="fas fa-users padding-small"></i>
Contact
</a>
</li>
<li class="panel anti-panel"><ul id="collapse-social" class="sidebar_submenu collapse ">
<li>
<a href="https://github.com/F3real" title="Github">
<i class="fab fa-github-square padding-small"></i>
Github
</a>
</li>
<li>
<a href="https://www.linkedin.com/in/stefan-ili%C4%87-61a004111" title="Linkedin">
<i class="fab fa-linkedin padding-small"></i>
Linkedin
</a>
</li>
</ul></li>
<li class="nav-divider"></li>
<li class="panel anti-panel"><ul id="collapse-pages" class="sidebar_submenu collapse ">
</ul></li>
<li class="nav-divider"></li>
<li>
<a data-toggle="collapse" data-parent="#accordion" href="#collapse-categories">
<i class="fas fa-folder-open padding-small"></i>
Categories
</a>
</li>
<li class="panel anti-panel"><ul id="collapse-categories" class="sidebar_submenu collapse ">
<li >
<a href="https://f3real.github.io/category/ctf.html">
<i class="fas fa-folder-open padding-small"></i>
ctf
<span class="badge badge-secondary float-right categorybadge">28</span>
</a>
</li>
<li >
<a href="https://f3real.github.io/category/misc.html">
<i class="fas fa-folder-open padding-small"></i>
misc
<span class="badge badge-secondary float-right categorybadge">15</span>
</a>
</li>
<li class="active">
<a href="https://f3real.github.io/category/reversing.html">
<i class="fas fa-folder-open padding-small"></i>
reversing
<span class="badge badge-secondary float-right categorybadge">6</span>
</a>
</li>
<li >
<a href="https://f3real.github.io/category/tutorial.html">
<i class="fas fa-folder-open padding-small"></i>
tutorial
<span class="badge badge-secondary float-right categorybadge">5</span>
</a>
</li>
</ul></li>
</ul>
</nav>
<!-- /#sidebar-wrapper -->
<!-- open/close sidebar -->
<button onclick="toggleMenu();return false;" class="btn btn-primary" id="menu-toggle">
<span id="right-arrow" class="fas fa-chevron-right" title="expand sidebar"></span>
<span id="left-arrow" class="fas fa-chevron-left" title="minimize sidebar"></span>
</button>
<!-- /open/close sidebar -->
<!-- Page Content -->
<div id="page-content-wrapper">
<div class="container-fluid">
<section id="content">
<article>
<div class="row">
<div class="col-lg-10">
<header class="page-header">
<h1>
<a href="https://f3real.github.io/asm-some.html"
rel="bookmark"
title="Permalink to asm-some">
asm-some
</a>
<small>
<div class="post-info">
<div class="publish-info-block">
<small>
<span class="published">
<i class="fa fa-calendar padding-small"></i><time datetime="2024-02-07T10:01:00+01:00"> Wed 07 February 2024</time>
</span>
<span class="category">
<i class="fa fa-folder-open padding-small"></i><a href="https://f3real.github.io/category/reversing.html">reversing</a>
</span>
<span class="tags">
<i class="fa fa-tags padding-small"></i>
<a href="https://f3real.github.io/tag/asm.html">asm</a> / <a href="https://f3real.github.io/tag/misc.html">misc</a> </span>
</small>
</div>
</div><!-- /.post-info --> </small>
</h1>
</header>
</div>
</div>
<div class="row">
<div class="col-lg-10">
<div class="entry-content">
<p>On Munich BSides conference Google had this flyers with asm riddle.</p>
<div class="highlight"><pre><span></span><code>It would be 'asm-some' to hear from you!
HINT: 32 bit
25 1c1f1c22 25 e3e0e3dd 2d 4e43422e 2d 37283c22 2d 1921411f 50
25 32322235 25 XXXXXXXX 2d 2c2f1b1b 2d 5c232129 2d 1380594c XX
25 2c2f1b1b 25 d3d0e4e4 XX 32322235 2d 22222422 2d 3d3c523c 50
25 XXXXXXXX 25 b1bcbdd1 2d 1c1f1c22 2d 25245424 2d 4c4c6252 50
</code></pre></div>
<p>We can, by just looking at the flyer, see some patterns and make some guesses.
For example in last column the missing value is probably <code>50</code>, similarly in 4th
column we can assume the missing value is <code>2d</code>. Also we can notice that 2nd and 6th column
are connected in some way, for example if in row A 2nd value is equal to 6th in row B then
2nd value of row B will be equal to 6th of row A.</p>
<p>Already using these guesses we can fill almost all of the missing fields but to get
last one we need to understand what the values mean.</p>
<p>Following the hint and trying to decompile given hex string as 32 asm we get:</p>
<div class="highlight"><pre><span></span><code><span class="err">00000000</span><span class="w"> </span><span class="err">251</span><span class="nf">C1F1C22</span><span class="w"> </span><span class="no">AND</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">221</span><span class="no">C1F1C</span>
<span class="err">00000005</span><span class="w"> </span><span class="err">25</span><span class="nf">E3E0E3DD</span><span class="w"> </span><span class="no">AND</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="no">DDE3E0E3</span>
<span class="err">0000000</span><span class="nf">A</span><span class="w"> </span><span class="mi">2</span><span class="no">D4E43422E</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">2</span><span class="no">E42434E</span>
<span class="err">0000000</span><span class="nf">F</span><span class="w"> </span><span class="mi">2</span><span class="no">D37283C22</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">223</span><span class="no">C2837</span>
<span class="err">00000014</span><span class="w"> </span><span class="err">2</span><span class="nf">D1921411F</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">1</span><span class="no">F412119</span>
<span class="err">00000019</span><span class="w"> </span><span class="err">50</span><span class="w"> </span><span class="nf">PUSH</span><span class="w"> </span><span class="no">EAX</span>
<span class="err">0000001</span><span class="nf">A</span><span class="w"> </span><span class="mi">2532322235</span><span class="w"> </span><span class="no">AND</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">35223232</span>
<span class="err">0000001</span><span class="nf">F</span><span class="w"> </span><span class="mi">2500000000</span><span class="w"> </span><span class="no">AND</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="err">????????</span><span class="w"> </span><span class="c1">; ??????</span>
<span class="err">00000024</span><span class="w"> </span><span class="err">2</span><span class="nf">D2C2F1B1B</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">1</span><span class="no">B1B2F2C</span>
<span class="err">00000029</span><span class="w"> </span><span class="err">2</span><span class="nf">D5C232129</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">2921235</span><span class="no">C</span>
<span class="err">0000002</span><span class="nf">E</span><span class="w"> </span><span class="mi">2</span><span class="no">D13008059</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">4</span><span class="no">C598013</span>
<span class="err">00000019</span><span class="w"> </span><span class="err">50</span><span class="w"> </span><span class="nf">PUSH</span><span class="w"> </span><span class="no">EAX</span><span class="w"> </span><span class="c1">; 0x50 our guess</span>
<span class="err">00000034</span><span class="w"> </span><span class="err">252</span><span class="nf">C2F1B1B</span><span class="w"> </span><span class="no">AND</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">1</span><span class="no">B1B2F2C</span>
<span class="err">00000039</span><span class="w"> </span><span class="err">25</span><span class="nf">D3D0E4E4</span><span class="w"> </span><span class="no">AND</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="no">E4E4D0D3</span><span class="w"> </span><span class="c1">; 0x2d our guess</span>
<span class="err">0000003</span><span class="nf">E</span><span class="w"> </span><span class="mi">2</span><span class="no">D32322235</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">35223232</span>
<span class="err">00000043</span><span class="w"> </span><span class="err">2</span><span class="nf">D22222422</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">22242222</span>
<span class="err">00000048</span><span class="w"> </span><span class="err">2</span><span class="nf">D3D3C523C</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">3</span><span class="no">C523C3D</span>
<span class="err">0000004</span><span class="nf">D</span><span class="w"> </span><span class="mi">50</span><span class="w"> </span><span class="no">PUSH</span><span class="w"> </span><span class="no">EAX</span>
<span class="err">0000004</span><span class="nf">E</span><span class="w"> </span><span class="mi">254</span><span class="no">E43422E</span><span class="w"> </span><span class="no">AND</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">2</span><span class="no">E42434E</span><span class="w"> </span><span class="c1">; 0x4e43422e our guess</span>
<span class="err">00000053</span><span class="w"> </span><span class="err">25</span><span class="nf">B1BCBDD1</span><span class="w"> </span><span class="no">AND</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="no">D1BDBCB1</span>
<span class="err">00000058</span><span class="w"> </span><span class="err">2</span><span class="nf">D1C1F1C22</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">221</span><span class="no">C1F1C</span>
<span class="err">0000005</span><span class="nf">D</span><span class="w"> </span><span class="mi">2</span><span class="no">D25245424</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">24542425</span>
<span class="err">00000062</span><span class="w"> </span><span class="err">2</span><span class="nf">D4C4C6252</span><span class="w"> </span><span class="no">SUB</span><span class="w"> </span><span class="no">EAX</span><span class="p">,</span><span class="mi">52624</span><span class="no">C4C</span>
<span class="err">00000067</span><span class="w"> </span><span class="err">50</span><span class="w"> </span><span class="nf">PUSH</span><span class="w"> </span><span class="no">EAX</span>
</code></pre></div>
<p>For this I used <a href="https://gchq.github.io/CyberChef/">https://gchq.github.io/CyberChef/</a>, but any decompiler should be fine.
If we look at binary representation of values in <code>AND</code> instructions we see they always
cancel each other giving 0 as result. Based on this we can confirm that our guess for
<code>0x4e43422e</code> was correct and that last missing value should be <code>0xcaddcdcd</code>.</p>
<p>Last thing remaining, is to figure out what does this asm snippet do.
We can emulate it in C:</p>
<div class="highlight"><pre><span></span><code><span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdio.h></span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdint.h></span>
<span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="c1">// Write C code here</span>
<span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"> </span><span class="c1">// doesn't matter</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">&=</span><span class="w"> </span><span class="mh">0x221C1F1C</span><span class="p">;</span><span class="w"> </span><span class="c1">// 00100010000111000001111100011100</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">&=</span><span class="w"> </span><span class="mh">0xDDE3E0E3</span><span class="p">;</span><span class="w"> </span><span class="c1">// 11011101111000111110000011100011</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x2E42434E</span><span class="p">;</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x223C2837</span><span class="p">;</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x1F412119</span><span class="p">;</span>
<span class="w"> </span><span class="n">printf</span><span class="p">(</span><span class="s">"0x%x</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">EAX</span><span class="p">);</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">&=</span><span class="w"> </span><span class="mh">0x35223232</span><span class="p">;</span><span class="w"> </span><span class="c1">// 00110101001000100011001000110010</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">&=</span><span class="w"> </span><span class="mh">0xCADDCDCD</span><span class="p">;</span><span class="w"> </span><span class="c1">// 11001010110111011100110111001101</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x1B1B2F2C</span><span class="p">;</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x2921235C</span><span class="p">;</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x59800013</span><span class="p">;</span>
<span class="w"> </span><span class="n">printf</span><span class="p">(</span><span class="s">"0x%x</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">EAX</span><span class="p">);</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">&=</span><span class="w"> </span><span class="mh">0x1B1B2F2C</span><span class="p">;</span><span class="w"> </span><span class="c1">// 00011011000110110010111100101100</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">&=</span><span class="w"> </span><span class="mh">0xE4E4D0D3</span><span class="p">;</span><span class="w"> </span><span class="c1">// 11100100111001001101000011010011</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x35223232</span><span class="p">;</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x22242222</span><span class="p">;</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x3C523C3D</span><span class="p">;</span>
<span class="w"> </span><span class="n">printf</span><span class="p">(</span><span class="s">"0x%x</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">EAX</span><span class="p">);</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">&=</span><span class="w"> </span><span class="mh">0x2E42434E</span><span class="p">;</span><span class="w"> </span><span class="c1">// 00101110010000100100001101001110</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">&=</span><span class="w"> </span><span class="mh">0xD1BDBCB1</span><span class="p">;</span><span class="w"> </span><span class="c1">// 11010001101111011011110010110001</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x221C1F1C</span><span class="p">;</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x24542425</span><span class="p">;</span>
<span class="w"> </span><span class="n">EAX</span><span class="w"> </span><span class="o">-=</span><span class="w"> </span><span class="mh">0x52624C4C</span><span class="p">;</span>
<span class="w"> </span><span class="n">printf</span><span class="p">(</span><span class="s">"0x%x</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">EAX</span><span class="p">);</span><span class="w"> </span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div>
<p>If we run this program, we get:</p>
<div class="highlight"><pre><span></span><code><span class="mf">0</span><span class="n">x90407362</span>
<span class="mf">0</span><span class="n">x6f6a2d65</span>
<span class="mf">0</span><span class="n">x6c676f6f</span>
<span class="mf">0</span><span class="n">x672d7073</span>
</code></pre></div>
<p>and, taking in consideration endianess, this gives us solution:
<code>0x73702d676f6f676c652d6a6f62734090 -> sp-google-jobs@</code></p>
</div>
<footer class="text-right">
<p>- F3real</p>
</footer>
<div id="show-comments" class="span7 text-center">
<a href="https://f3real.github.io/asm-some.html#disqus_thread"
data-disqus-identifier="asm-some"
class="btn btn-primary twitchy-background">Show Comments</a>
</div>
<section id="comments" class="comments hidden">
<hr/>
<h2>Comments</h2>
<div id="disqus_thread"></div>
<noscript>Please enable JavaScript to view the <a href="http://disqus.com/?ref_noscript">comments powered by
Disqus.</a></noscript>
<a href="http://disqus.com" class="dsq-brlink">comments powered by <span class="logo-disqus">Disqus</span></a>
</section>
</div>
</div>
</article>
</section>
<footer>
<hr>
<div class="row">
<div class="col-lg-10 text-center">
<p><small>
Built by <a href="http://docs.getpelican.com/en/latest">Pelican</a> / <a href="https://github.com/F3real/pelican-twitchy">pelican-twitchy</a>
· © 2024 F3real
</small></p>
</div>
</div>
</footer> </div>
</div>
<!-- /#page-content-wrapper -->
</div>
<!-- /#wrapper -->
<!-- disqus -->
<script type="text/javascript">
/* * * CONFIGURATION VARIABLES: EDIT BEFORE PASTING INTO YOUR WEBPAGE * * */
var disqus_shortname = 'https-f3real-github-io'; // required: replace example with your forum shortname
var disqus_identifier = 'asm-some';
var disqus_url = 'https://f3real.github.io/asm-some.html';
var disqus_config = function () {
this.language = "en";
};
var commentsDiv = document.getElementById('show-comments');
commentsDiv.onclick = function() {
/* * * DON'T EDIT BELOW THIS LINE * * */
(function () {
var dsq = document.createElement('script');
dsq.type = 'text/javascript';
dsq.async = true;
dsq.src = '//' + disqus_shortname + '.disqus.com/embed.js';
(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
})();
this.style.display = 'none';
};
</script>
<!-- /disqus -->
<script>
const wrapper = document.getElementById('wrapper');
const sidebarBig = document.getElementById('sidebar-wrapper');
const sidebarSmall = document.getElementById('sidebar-wrapper-small');
const triggers = Array.from(document.querySelectorAll('[data-toggle="collapse"]'));
for (var i = 0; i < triggers.length; i++) {
triggers[i].addEventListener('click', (ev) => {
const elm = ev.currentTarget;
ev.preventDefault();
const selector = elm.getAttribute('href').replace('#','');
elm.classList.toggle('collapsed');
document.getElementById(selector).classList.toggle('show');
}, false);
}
function showBigNav() {;
sidebarBig.style.display = 'block';
sidebarSmall.style.display = 'none';
}
function showSmallNav() {
sidebarBig.style.display = 'none';
sidebarSmall.style.display = 'block';
}
const mediaQuery = window.matchMedia('(min-width:768px)');
mediaQuery.onchange = e => {
if (wrapper.classList.contains('toggled')) {
wrapper.classList.remove('toggled');
} else {
if (e.matches) {
showBigNav();
} else {
showSmallNav();
}
}
}
function setNavbar() {
var condition = wrapper.classList.contains('toggled');
if (!mediaQuery.matches) {
condition = !condition;
}
if (condition) {
showSmallNav();
} else {
showBigNav();
}
}
function toggleMenu(){
wrapper.classList.toggle('toggled');
setNavbar();
}
window.onload = setNavbar;
</script>
<script data-goatcounter="https://f3real.goatcounter.com/count"
async src="//gc.zgo.at/count.js"></script>
</body>
</html>