mirror of
https://codeberg.org/grunfink/snac2.git
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Merge pull request 'Attempt to prevent XSS.' (#64) from yonle/snac2:master into master
Reviewed-on: https://codeberg.org/grunfink/snac2/pulls/64
This commit is contained in:
grunfink
commit
a5272a21e6
2 changed files with 71 additions and 41 deletions
97
html.c
97
html.c
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@ -105,7 +105,7 @@ xs_str *html_actor_icon(xs_str *os, char *actor,
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{
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xs *s1 = xs_fmt("<a href=\"%s\" class=\"p-author h-card snac-author\">%s</a>",
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xs_dict_get(actor, "id"), name);
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xs_dict_get(actor, "id"), xs_encode_html(name));
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s = xs_str_cat(s, s1);
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}
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@ -139,7 +139,7 @@ xs_str *html_actor_icon(xs_str *os, char *actor,
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xs *s1 = xs_fmt(
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"\n<time class=\"dt-published snac-pubdate\" title=\"%s\">%s</time>\n",
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date_title, date_label);
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xs_encode_html(date_title), xs_encode_html(date_label));
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s = xs_str_cat(s, s1);
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}
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@ -164,7 +164,7 @@ xs_str *html_actor_icon(xs_str *os, char *actor,
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s1 = xs_fmt(
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"<br><a href=\"%s\" class=\"p-author-tag h-card snac-author-tag\">%s</a>",
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xs_dict_get(actor, "id"), user);
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xs_dict_get(actor, "id"), xs_encode_html(user));
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s = xs_str_cat(s, s1);
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}
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@ -245,9 +245,9 @@ d_char *html_user_header(snac *snac, d_char *s, int local)
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{
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xs *s1 = xs_fmt("<title>%s (@%s@%s)</title>\n",
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xs_dict_get(snac->config, "name"),
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snac->uid,
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xs_dict_get(srv_config, "host"));
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xs_encode_html(xs_dict_get(snac->config, "name")),
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xs_encode_html(snac->uid),
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xs_encode_html(xs_dict_get(srv_config, "host")));
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s = xs_str_cat(s, s1);
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}
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@ -284,18 +284,18 @@ d_char *html_user_header(snac *snac, d_char *s, int local)
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"<meta property=\"og:image\" content=\"%s\"/>\n"
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"<meta property=\"og:image:width\" content=\"300\"/>\n"
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"<meta property=\"og:image:height\" content=\"300\"/>\n",
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xs_dict_get(srv_config, "host"),
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xs_dict_get(snac->config, "name"),
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snac->uid,
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xs_dict_get(srv_config, "host"),
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s_bio,
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s_avatar);
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xs_encode_html(xs_dict_get(srv_config, "host")),
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xs_encode_html(xs_dict_get(snac->config, "name")),
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xs_encode_html(snac->uid),
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xs_encode_html(xs_dict_get(srv_config, "host")),
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xs_encode_html(s_bio),
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xs_encode_html(s_avatar));
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s = xs_str_cat(s, s1);
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}
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{
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xs *s1 = xs_fmt("<link rel=\"alternate\" type=\"application/rss+xml\" "
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"title=\"RSS\" href=\"%s.rss\" />\n", snac->actor);
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"title=\"RSS\" href=\"%s.rss\" />\n", snac->actor); /* snac->actor is likely need to be URLEncoded. */
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s = xs_str_cat(s, s1);
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}
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@ -355,16 +355,16 @@ d_char *html_user_header(snac *snac, d_char *s, int local)
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"<p class=\"snac-top-user-id\">@%s@%s</p>\n";
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xs *s1 = xs_fmt(_tmpl,
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xs_dict_get(snac->config, "name"),
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xs_dict_get(snac->config, "uid"), xs_dict_get(srv_config, "host")
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xs_encode_html(xs_dict_get(snac->config, "name")),
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xs_encode_html(xs_dict_get(snac->config, "uid")), xs_encode_html(xs_dict_get(srv_config, "host"))
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);
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s = xs_str_cat(s, s1);
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if (local) {
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xs *bio1 = not_really_markdown(xs_dict_get(snac->config, "bio"), NULL);
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xs *bio1 = not_really_markdown(xs_encode_html(xs_dict_get(snac->config, "bio")), NULL);
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xs *tags = xs_list_new();
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xs *bio2 = process_tags(snac, bio1, &tags);
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xs *bio2 = xs_encode_html(process_tags(snac, bio1, &tags));
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xs *s1 = xs_fmt("<div class=\"p-note snac-top-user-bio\">%s</div>\n", bio2);
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s = xs_str_cat(s, s1);
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@ -914,7 +914,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
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xs *s1 = xs_fmt(
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"<div class=\"snac-origin\">"
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"<a href=\"%s\">%s</a> %s</a></div>",
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snac->actor, xs_dict_get(snac->config, "name"), L("boosted")
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snac->actor, xs_encode_html(xs_dict_get(snac->config, "name")), L("boosted")
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);
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s = xs_str_cat(s, s1);
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@ -928,7 +928,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
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"<div class=\"snac-origin\">"
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"<a href=\"%s\">%s</a> %s</div>\n",
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xs_dict_get(actor_r, "id"),
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name,
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xs_encode_html(name),
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L("boosted")
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);
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@ -967,7 +967,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
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char *cw = xs_dict_get(snac->config, "cw");
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if (xs_is_null(cw) || local)
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cw = "";
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xs *s1 = xs_fmt("<details %s><summary>%s [%s]</summary>\n", cw, v, L("SENSITIVE CONTENT"));
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xs *s1 = xs_fmt("<details %s><summary>%s [%s]</summary>\n", cw, xs_encode_html(v), L("SENSITIVE CONTENT"));
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s = xs_str_cat(s, s1);
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sensitive = 1;
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}
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@ -1049,7 +1049,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
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if (name && replies) {
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int nr = xs_number_get(xs_dict_get(replies, "totalItems"));
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xs *l = xs_fmt("<tr><td>%s:</td><td>%d</td></tr>\n", name, nr);
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xs *l = xs_fmt("<tr><td>%s:</td><td>%d</td></tr>\n", xs_encode_html(name), nr);
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c = xs_str_cat(c, l);
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}
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@ -1073,7 +1073,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
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xs *opt = xs_fmt("<input type=\"%s\""
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" id=\"%s\" value=\"%s\" name=\"question\"> %s<br>\n",
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!xs_is_null(oo) ? "radio" : "checkbox",
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name, name, name);
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xs_encode_html(name), xs_encode_html(name), xs_encode_html(name));
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s1 = xs_str_cat(s1, opt);
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}
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@ -1107,7 +1107,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
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/* skip leading zeros */
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for (; *p == '0' || *p == ':'; p++);
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xs *s1 = xs_fmt("<p>%s %s</p>", L("Closes in"), p);
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xs *s1 = xs_fmt("<p>%s %s</p>", L("Closes in"), xs_encode_html(p));
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c = xs_str_cat(c, s1);
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}
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}
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@ -1136,7 +1136,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
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if (xs_startswith(t, "image/")) {
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char *url = xs_dict_get(v, "url");
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char *name = xs_dict_get(v, "name");
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char *name = xs_encode_html(xs_dict_get(v, "name"));
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if (url != NULL) {
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if (xs_is_null(name))
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@ -1151,9 +1151,31 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
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else
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if (xs_startswith(t, "video/")) {
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char *url = xs_dict_get(v, "url");
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char *name = xs_encode_html(xs_dict_get(v, "name"));
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if (url != NULL) {
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xs *s1 = xs_fmt("<object data=\"%s\"></object>\n", url);
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xs *s1 = xs_fmt("<video style=\"max-width: 90vw; max-height: 70vh;\" controls src=\"%s\">Video: <a href=\"%s\">%s</a></video>\n", url, url, name ? name : "No description.");
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s = xs_str_cat(s, s1);
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}
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}
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else
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if (xs_startswith(t, "audio/")) {
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char *url = xs_dict_get(v, "url");
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char *name = xs_encode_html(xs_dict_get(v, "name"));
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if (url != NULL) {
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xs *s1 = xs_fmt("<audio style=\"max-width: 90vw\" controls src=\"%s\">Audio: <a href=\"%s\">%s</a></audio>\n", url, url, name ? name : "No description.");
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s = xs_str_cat(s, s1);
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}
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}
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else {
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char *url = xs_dict_get(v, "url");
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char *name = xs_encode_html(xs_dict_get(v, "name"));
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if (url != NULL) {
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xs *s1 = xs_fmt("<a href=\"%s\">Attachment: %s</a>", url, name ? name : "No description");
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s = xs_str_cat(s, s1);
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}
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@ -1327,7 +1349,7 @@ xs_str *html_timeline(snac *snac, const xs_list *list, int local, int skip, int
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d_char *html_people_list(snac *snac, d_char *os, d_char *list, const char *header, const char *t)
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{
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xs *s = xs_str_new(NULL);
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xs *h = xs_fmt("<h2 class=\"snac-header\">%s</h2>\n", header);
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xs *h = xs_fmt("<h2 class=\"snac-header\">%s</h2>\n", xs_encode_html(header));
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char *p, *actor_id;
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s = xs_str_cat(s, h);
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@ -1357,7 +1379,7 @@ d_char *html_people_list(snac *snac, d_char *os, d_char *list, const char *heade
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if (xs_startswith(sc, "<p>"))
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s = xs_str_cat(s, sc);
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else {
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xs *s1 = xs_fmt("<p>%s</p>", sc);
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xs *s1 = xs_fmt("<p>%s</p>", xs_encode_html(sc));
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s = xs_str_cat(s, s1);
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}
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@ -1529,7 +1551,7 @@ xs_str *html_notifications(snac *snac)
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xs *s1 = xs_fmt("<div class=\"snac-post-with-desc\">\n"
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"<p><b>%s by <a href=\"%s\">%s</a></b>:</p>\n",
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label, actor_id, a_name);
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xs_encode_html(label), actor_id, xs_encode_html(a_name));
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s = xs_str_cat(s, s1);
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if (strcmp(type, "Follow") == 0 || strcmp(utype, "Follow") == 0) {
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@ -1754,9 +1776,6 @@ int html_get_handler(const xs_dict *req, const char *q_path,
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xs *bio = not_really_markdown(xs_dict_get(snac.config, "bio"), NULL);
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char *p, *v;
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/* escape tags */
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bio = xs_replace_i(bio, "<", "<");
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bio = xs_replace_i(bio, ">", ">");
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rss = xs_fmt(
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"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
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@ -1766,11 +1785,11 @@ int html_get_handler(const xs_dict *req, const char *q_path,
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"<language>en</language>\n"
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"<link>%s.rss</link>\n"
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"<description>%s</description>\n",
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xs_dict_get(snac.config, "name"),
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snac.uid,
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xs_dict_get(srv_config, "host"),
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xs_encode_html(xs_dict_get(snac.config, "name")),
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xs_encode_html(snac.uid),
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xs_encode_html(xs_dict_get(srv_config, "host")),
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snac.actor,
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bio
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xs_encode_html(bio)
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);
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p = elems;
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@ -1785,14 +1804,10 @@ int html_get_handler(const xs_dict *req, const char *q_path,
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if (!xs_startswith(id, snac.actor))
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continue;
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xs *content = sanitize(xs_dict_get(msg, "content"));
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xs *content = xs_encode_html(sanitize(xs_dict_get(msg, "content")));
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xs *title = xs_str_new(NULL);
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int i;
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/* escape tags */
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content = xs_replace_i(content, "<", "<");
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content = xs_replace_i(content, ">", ">");
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for (i = 0; content[i] && content[i] != '<' && content[i] != '&' && i < 40; i++)
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title = xs_append_m(title, &content[i], 1);
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@ -1802,7 +1817,7 @@ int html_get_handler(const xs_dict *req, const char *q_path,
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"<link>%s</link>\n"
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"<description>%s</description>\n"
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"</item>\n",
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title, id, content
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xs_encode_html(title), id, xs_encode_html(content)
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);
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rss = xs_str_cat(rss, s);
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15
xs.h
15
xs.h
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@ -72,6 +72,7 @@ xs_str *xs_replace_in(xs_str *str, const char *sfrom, const char *sto, int times
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xs_str *xs_fmt(const char *fmt, ...);
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int xs_str_in(const char *haystack, const char *needle);
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int _xs_startsorends(const char *str, const char *xfix, int ends);
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xs_str *xs_encode_html(const xs_str *str);
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#define xs_startswith(str, prefix) _xs_startsorends(str, prefix, 0)
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#define xs_endswith(str, postfix) _xs_startsorends(str, postfix, 1)
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xs_str *xs_crop_i(xs_str *str, int start, int end);
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@ -506,6 +507,20 @@ int _xs_startsorends(const char *str, const char *xfix, int ends)
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return !!(ssz >= psz && memcmp(xfix, str + (ends ? ssz - psz : 0), psz) == 0);
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}
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xs_str *xs_encode_html(const char *str)
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/* escapes html characters */
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{
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xs_str *encoded = xs_replace(str, "&", "&");
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encoded = xs_replace(encoded, "<", "<");
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encoded = xs_replace(encoded, ">", ">");
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encoded = xs_replace(encoded, "\"", """);
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encoded = xs_replace(encoded, "'", "'");
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// Restore only <br>. Probably safe. Let's hope nothing goes wrong with this.
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encoded = xs_replace(encoded, "<br>", "<br>");
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return encoded;
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}
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xs_str *xs_crop_i(xs_str *str, int start, int end)
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/* crops the d_char to be only from start to end */
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