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authorJason A. Donenfeld <Jason@zx2c4.com>2016-01-14 14:28:37 +0100
committerJason A. Donenfeld <Jason@zx2c4.com>2016-01-14 14:28:37 +0100
commit513b3863d999f91b47d7e9f26710390db55f9463 (patch)
treef704af1ea3f8da9b3b2904fbe8ed8233278314c6 /html.c
parentui-shared: Avoid new line injection into redirect header (diff)
downloadcgit-pink-513b3863d999f91b47d7e9f26710390db55f9463.tar.gz
cgit-pink-513b3863d999f91b47d7e9f26710390db55f9463.zip
ui-shared: prevent malicious filename from injecting headers
Diffstat (limited to '')
-rw-r--r--html.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/html.c b/html.c
index 959148c..d89df3a 100644
--- a/html.c
+++ b/html.c
@@ -239,6 +239,32 @@ void html_url_arg(const char *txt)
 		html(txt);
 }
 
+void html_header_arg_in_quotes(const char *txt)
+{
+	const char *t = txt;
+	while (t && *t) {
+		unsigned char c = *t;
+		const char *e = NULL;
+		if (c == '\\')
+			e = "\\\\";
+		else if (c == '\r')
+			e = "\\r";
+		else if (c == '\n')
+			e = "\\n";
+		else if (c == '"')
+			e = "\\\"";
+		if (e) {
+			html_raw(txt, t - txt);
+			html(e);
+			txt = t + 1;
+		}
+		t++;
+	}
+	if (t != txt)
+		html(txt);
+
+}
+
 void html_hidden(const char *name, const char *value)
 {
 	html("<input type='hidden' name='");