Fossil

Check-in [ff747b51]
Login
☰Home Timeline Docs SupportDownload

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Disallow inline javascript unless protected by a nonce.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA3-256: ff747b5151fa2edaedfd7dd2b109b1c172663315b88e17bb03d9a353dcff8cca
User & Date: drh 2018-08-29 11:06:36
Context
2018-08-29
11:17
Updates to the "How The Download Page Works" document. (check-in: 498cfbf7 user: drh tags: trunk)
11:06
Disallow inline javascript unless protected by a nonce. (check-in: ff747b51 user: drh tags: trunk)
11:04
Try to start a new write transaction before updating the VCACHE table. This will hopefully prevent occasional "database is locked" errors when browsing the documentation. (check-in: 03979823 user: drh tags: trunk)
2018-08-26
03:35
Applied the new CSP nonce to the <script> tags in the header for the Enhanced Original, Eagle, and Xekri skins, else the clock in the upper right breaks and Chrome gives an error about the CSP violation. (Closed-Leaf check-in: b9d86ed2 user: wyoung tags: csp-nonce)
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to skins/eagle/header.txt. 

69
70
71
72
73
74
75
76
77
78
79
80
81
82
83

     if {[info exists login]} {
       puts "Logged in as $login"
     } else {
       puts "Not logged in"
     }
  </th1></nobr><small><div id="clock"></div></small></div>
</div>
<script>
function updateClock(){
  var e = document.getElementById("clock");
  if(e){
    var d = new Date();
    function f(n) {
      return n < 10 ? '0' + n : n;
    }








|








69
70
71
72
73
74
75
76
77
78
79
80
81
82
83

     if {[info exists login]} {
       puts "Logged in as $login"
     } else {
       puts "Not logged in"
     }
  </th1></nobr><small><div id="clock"></div></small></div>
</div>
<th1>html "<script nonce='$nonce'>"</th1>
function updateClock(){
  var e = document.getElementById("clock");
  if(e){
    var d = new Date();
    function f(n) {
      return n < 10 ? '0' + n : n;
    }

Changes to skins/enhanced1/header.txt. 

69
70
71
72
73
74
75
76
77
78
79
80
81
82
83

     if {[info exists login]} {
       puts "Logged in as $login"
     } else {
       puts "Not logged in"
     }
  </th1></nobr><small><div id="clock"></div></small></div>
</div>
<script>
function updateClock(){
  var e = document.getElementById("clock");
  if(e){
    var d = new Date();
    function f(n) {
      return n < 10 ? '0' + n : n;
    }








|








69
70
71
72
73
74
75
76
77
78
79
80
81
82
83

     if {[info exists login]} {
       puts "Logged in as $login"
     } else {
       puts "Not logged in"
     }
  </th1></nobr><small><div id="clock"></div></small></div>
</div>
<th1>html "<script nonce='$nonce'>"</th1>
function updateClock(){
  var e = document.getElementById("clock");
  if(e){
    var d = new Date();
    function f(n) {
      return n < 10 ? '0' + n : n;
    }

Changes to skins/xekri/header.txt. 

69
70
71
72
73
74
75
76
77
78
79
80
81
82
83

     if {[info exists login]} {
       puts "Logged in as $login"
     } else {
       puts "Not logged in"
     }
  </th1></nobr><small><div id="clock"></div></small></div>
</div>
<script>
function updateClock(){
  var e = document.getElementById("clock");
  if(e){
    var d = new Date();
    function f(n) {
      return n < 10 ? '0' + n : n;
    }








|








69
70
71
72
73
74
75
76
77
78
79
80
81
82
83

     if {[info exists login]} {
       puts "Logged in as $login"
     } else {
       puts "Not logged in"
     }
  </th1></nobr><small><div id="clock"></div></small></div>
</div>
<th1>html "<script nonce='$nonce'>"</th1>
function updateClock(){
  var e = document.getElementById("clock");
  if(e){
    var d = new Date();
    function f(n) {
      return n < 10 ? '0' + n : n;
    }

Changes to src/codecheck1.c. 

396
397
398
399
400
401
402

403
404
405
406
407
408
409

  { "json_new_string_f",       1, 0 },
  { "json_set_err",            2, 0 },
  { "json_warn",               2, 0 },
  { "mprintf",                 1, 0 },
  { "socket_set_errmsg",       1, 0 },
  { "ssl_set_errmsg",          1, 0 },
  { "style_header",            1, FMT_HTML },

  { "style_set_current_page",  1, FMT_URL },
  { "style_submenu_element",   2, FMT_URL },
  { "style_submenu_sql",       3, FMT_SQL },
  { "webpage_error",           1, FMT_SAFE },
  { "xhref",                   2, FMT_URL },
};









>








396
397
398
399
400
401
402
403
404
405
406
407
408
409
410

  { "json_new_string_f",       1, 0 },
  { "json_set_err",            2, 0 },
  { "json_warn",               2, 0 },
  { "mprintf",                 1, 0 },
  { "socket_set_errmsg",       1, 0 },
  { "ssl_set_errmsg",          1, 0 },
  { "style_header",            1, FMT_HTML },
  { "style_js_onload",         1, FMT_HTML },
  { "style_set_current_page",  1, FMT_URL },
  { "style_submenu_element",   2, FMT_URL },
  { "style_submenu_sql",       3, FMT_SQL },
  { "webpage_error",           1, FMT_SAFE },
  { "xhref",                   2, FMT_URL },
};

Changes to src/style.c. 

84
85
86
87
88
89
90






91
92
93
94
95
96
97
...
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
...
400
401
402
403
404
405
406

407
408
409
410
411
412
413
...
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
...
539
540
541
542
543
544
545
546
547




548
549

550
551
552

553
554
555

556
















557
558
559
560
561
562
563

/*
** Flags for various javascript files needed prior to </body>
*/
static int needHrefJs = 0;   /* href.js */
static int needSortJs = 0;   /* sorttable.js */
static int needGraphJs = 0;  /* graph.js */







/*
** Generate and return a anchor tag like this:
**
**        <a href="URL">
**  or    <a id="ID">
**
** The form of the anchor tag is determined by the g.javascriptHyperlink
................................................................................
static void image_url_var(const char *zImageName){
  char *zVarPrefix = mprintf("%s_image", zImageName);
  char *zConfigName = mprintf("%s-image", zImageName);
  url_var(zVarPrefix, zConfigName, zImageName);
  free(zVarPrefix);
  free(zConfigName);
}















/*
** Default HTML page header text through <body>.  If the repository-specific
** header template lacks a <body> tag, then all of the following is
** prepended.
*/
static char zDfltHeader[] = 
@ <html>
@ <head>
@ <base href="$baseurl/$current_page" />
@ <meta http-equiv="Content-Security-Policy" \
@  content="default-src 'self' data: 'unsafe-inline'" />


@ <meta name="viewport" content="width=device-width, initial-scale=1.0">
@ <title>$<project_name>: $<title></title>
@ <link rel="alternate" type="application/rss+xml" title="RSS Feed" \
@  href="$home/timeline.rss" />
@ <link rel="stylesheet" href="$stylesheet_url" type="text/css" \
@  media="screen" />
@ </head>
................................................................................
  cgi_destination(CGI_HEADER);

  @ <!DOCTYPE html>

  if( g.thTrace ) Th_Trace("BEGIN_HEADER<br />\n", -1);

  /* Generate the header up through the main menu */

  Th_Store("project_name", db_get("project-name","Unnamed Fossil Project"));
  Th_Store("project_description", db_get("project-description",""));
  Th_Store("title", zTitle);
  Th_Store("baseurl", g.zBaseURL);
  Th_Store("secureurl", login_wants_https_redirect()? g.zHttpsURL: g.zBaseURL);
  Th_Store("home", g.zTop);
  Th_Store("index_page", db_get("index-page","/home"));
................................................................................
*/
void style_load_js(const char *zName){
  int i;
  for(i=0; i<nJsToLoad; i++){
    if( fossil_strcmp(zName, azJsToLoad[i])==0 ) return;
  }
  if( nJsToLoad>=sizeof(azJsToLoad)/sizeof(azJsToLoad[0]) ){
    fossil_panic("too man JS files");
  }
  azJsToLoad[nJsToLoad++] = zName;
}

/*
** Generate code to load all required javascript files.
*/
................................................................................
    int nDelay = db_get_int("auto-hyperlink-delay",0);
    int bMouseover;
    /* Load up the page data */
    bMouseover = (!g.isHuman || db_get_boolean("auto-hyperlink-ishuman",0))
                 && db_get_boolean("auto-hyperlink-mouseover",0);
    @ <script id='href-data' type='application/json'>\
    @ {"delay":%d(nDelay),"mouseover":%d(bMouseover)}</script>
    style_load_one_js_file("href.js");
  }




  if( needSortJs ){
    style_load_one_js_file("sorttable.js");

  }
  if( needGraphJs ){
    style_load_one_js_file("graph.js");

  }
  for(i=0; i<nJsToLoad; i++){
    style_load_one_js_file(azJsToLoad[i]);

  }
















}

/*
** Draw the footer at the bottom of the page.
*/
void style_footer(void){
  const char *zFooter;








>
>
>
>
>
>







 







>
>
>
>
>
>
>
>
>
>
>
>
>
>











|
>
>







 







>







 







|







 







<

>
>
>
>

<
>


<
>


<
>

>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>








84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
...
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
403
404
405
...
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
...
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
...
562
563
564
565
566
567
568

569
570
571
572
573
574

575
576
577

578
579
580

581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605

/*
** Flags for various javascript files needed prior to </body>
*/
static int needHrefJs = 0;   /* href.js */
static int needSortJs = 0;   /* sorttable.js */
static int needGraphJs = 0;  /* graph.js */

/*
** Extra JS added to the end of the file.
*/
static Blob blobJs = BLOB_INITIALIZER;
static Blob blobOnLoad = BLOB_INITIALIZER;

/*
** Generate and return a anchor tag like this:
**
**        <a href="URL">
**  or    <a id="ID">
**
** The form of the anchor tag is determined by the g.javascriptHyperlink
................................................................................
static void image_url_var(const char *zImageName){
  char *zVarPrefix = mprintf("%s_image", zImageName);
  char *zConfigName = mprintf("%s-image", zImageName);
  url_var(zVarPrefix, zConfigName, zImageName);
  free(zVarPrefix);
  free(zConfigName);
}

/*
** Return a random nonce that is stored in static space.  For a particular
** run, the same nonce is always returned.
*/
char *style_nonce(void){
  static char zNonce[52];
  if( zNonce[0]==0 ){
    unsigned char zSeed[24];
    sqlite3_randomness(24, zSeed);
    encode16(zSeed,(unsigned char*)zNonce,24);
  }
  return zNonce;
}

/*
** Default HTML page header text through <body>.  If the repository-specific
** header template lacks a <body> tag, then all of the following is
** prepended.
*/
static char zDfltHeader[] = 
@ <html>
@ <head>
@ <base href="$baseurl/$current_page" />
@ <meta http-equiv="Content-Security-Policy" \
@  content="default-src 'self' data: ; \
@  script-src 'self' 'nonce-$<nonce>' ;\
@  style-src 'self' 'unsafe-inline'" />
@ <meta name="viewport" content="width=device-width, initial-scale=1.0">
@ <title>$<project_name>: $<title></title>
@ <link rel="alternate" type="application/rss+xml" title="RSS Feed" \
@  href="$home/timeline.rss" />
@ <link rel="stylesheet" href="$stylesheet_url" type="text/css" \
@  media="screen" />
@ </head>
................................................................................
  cgi_destination(CGI_HEADER);

  @ <!DOCTYPE html>

  if( g.thTrace ) Th_Trace("BEGIN_HEADER<br />\n", -1);

  /* Generate the header up through the main menu */
  Th_Store("nonce", style_nonce());
  Th_Store("project_name", db_get("project-name","Unnamed Fossil Project"));
  Th_Store("project_description", db_get("project-description",""));
  Th_Store("title", zTitle);
  Th_Store("baseurl", g.zBaseURL);
  Th_Store("secureurl", login_wants_https_redirect()? g.zHttpsURL: g.zBaseURL);
  Th_Store("home", g.zTop);
  Th_Store("index_page", db_get("index-page","/home"));
................................................................................
*/
void style_load_js(const char *zName){
  int i;
  for(i=0; i<nJsToLoad; i++){
    if( fossil_strcmp(zName, azJsToLoad[i])==0 ) return;
  }
  if( nJsToLoad>=sizeof(azJsToLoad)/sizeof(azJsToLoad[0]) ){
    fossil_panic("too many JS files");
  }
  azJsToLoad[nJsToLoad++] = zName;
}

/*
** Generate code to load all required javascript files.
*/
................................................................................
    int nDelay = db_get_int("auto-hyperlink-delay",0);
    int bMouseover;
    /* Load up the page data */
    bMouseover = (!g.isHuman || db_get_boolean("auto-hyperlink-ishuman",0))
                 && db_get_boolean("auto-hyperlink-mouseover",0);
    @ <script id='href-data' type='application/json'>\
    @ {"delay":%d(nDelay),"mouseover":%d(bMouseover)}</script>

  }
  @ <script nonce="%h(style_nonce())">
  if( needHrefJs ){
    cgi_append_content(builtin_text("href.js"),-1);
  }
  if( needSortJs ){

    cgi_append_content(builtin_text("sorttable.js"),-1);
  }
  if( needGraphJs ){

    cgi_append_content(builtin_text("graph.js"),-1);
  }
  for(i=0; i<nJsToLoad; i++){

    cgi_append_content(builtin_text(azJsToLoad[i]),-1);
  }
  if( blob_size(&blobOnLoad)>0 ){
    @ window.onload = function(){
    cgi_append_content(blob_buffer(&blobOnLoad), blob_size(&blobOnLoad));
    cgi_append_content("\n}\n", -1);
  }
  @ </script>
}

/*
** Extra JS to run after all content is loaded.
*/
void style_js_onload(const char *zFormat, ...){
  va_list ap;
  va_start(ap, zFormat);
  blob_vappendf(&blobOnLoad, zFormat, ap);
  va_end(ap);
}

/*
** Draw the footer at the bottom of the page.
*/
void style_footer(void){
  const char *zFooter;

This page was generated in about 0.008s by Fossil 2.12 [2ae6b1cc01] 2020-07-05 14:42:06