diff options
| author | John MacFarlane <jgm@berkeley.edu> | 2015-07-13 09:21:35 -0700 |
|---|---|---|
| committer | John MacFarlane <jgm@berkeley.edu> | 2015-07-13 10:15:55 -0700 |
| commit | ac39623d667999cfae1444b46508a9a423b0df1b (patch) | |
| tree | 40579cea4365b373fdc2831c2e43c2288671d028 /src/scanners.re | |
| parent | 6dcd2beafdfbc9f694916bcdfa822b896aa44177 (diff) | |
Added `CMARK_OPT_SAFE` option and `--safe` command-line flag.
* Added `CMARK_OPT_SAFE`. This option disables rendering of raw HTML
and potentially dangerous links.
* Added `--safe` option in command-line program.
* Updated `cmark.3` man page.
* Added `scan_dangerous_url` to scanners.
* In HTML, suppress rendering of raw HTML and potentially dangerous
links if `CMARK_OPT_SAFE`. Dangerous URLs are those that begin
with `javascript:`, `vbscript:`, `file:`, or `data:` (except for
`image/png`, `image/gif`, `image/jpeg`, or `image/webp` mime types).
* Added `api_test` for `OPT_CMARK_SAFE`.
* Rewrote `README.md` on security.
Diffstat (limited to 'src/scanners.re')
| -rw-r--r-- | src/scanners.re | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/scanners.re b/src/scanners.re index efa6731..fbe3283 100644 --- a/src/scanners.re +++ b/src/scanners.re @@ -315,3 +315,17 @@ bufsize_t _scan_entity(const unsigned char *p) .? { return 0; } */ } + +// Returns positive value if a URL begins in a way that is potentially +// dangerous, with javascript:, vbscript:, file:, or data:, otherwise 0. +bufsize_t _scan_dangerous_url(const unsigned char *p) +{ + const unsigned char *marker = NULL; + const unsigned char *start = p; +/*!re2c + 'data:image/' ('png'|'gif'|'jpeg'|'webp') { return 0; } + 'javascript:' | 'vbscript:' | 'file:' | 'data:' { return (bufsize_t)(p - start); } + .? { return 0; } +*/ +} + |