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authorDerek Jones <derek.jones@ellislab.com>2010-10-07 00:51:59 +0200
committerDerek Jones <derek.jones@ellislab.com>2010-10-07 00:51:59 +0200
commit2ef375969b77c5fdf84118d4a7a8e0bc97d9d2f6 (patch)
treec9a3a7f9c53d3cd0392c982e6fb54e992c40eb65 /user_guide/libraries/security.html
parent2615e418539c3d6e2f912c66be99ffebfb8513ff (diff)
modified the security helper to assist in preventing directory traversal when using sanitize_filename() for user input
Diffstat (limited to 'user_guide/libraries/security.html')
-rw-r--r--user_guide/libraries/security.html5
1 files changed, 5 insertions, 0 deletions
diff --git a/user_guide/libraries/security.html b/user_guide/libraries/security.html
index a50d94846..6d6216d95 100644
--- a/user_guide/libraries/security.html
+++ b/user_guide/libraries/security.html
@@ -102,6 +102,11 @@ Note: This function should only be used to deal with data upon submission. It's
<code>$filename = $this->security->sanitize_filename($this->input->post('filename'));</code>
+<p>If it is acceptable for the user input to include relative paths, e.g. <kbd>file/in/some/approved/folder.txt</kbd>, you can set the second optional parameter,
+ <samp>$relative_path</samp> to TRUE.</p>
+
+<code>$filename = $this->security->sanitize_filename($this->input->post('filename'), TRUE);</code>
+
<!-- @todo write docs for CSRF methods -->
</div>