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authorDave Reisner <d@falconindy.com>2011-06-24 00:18:01 -0400
committerDave Reisner <dreisner@archlinux.org>2011-07-05 22:58:55 -0400
commit6dc71926f9b16ebcf11b924941092d6eab204224 (patch)
tree5e90f3b970a257687f9a123590b4ff3c94d1812f /lib/libalpm/dload.h
parent6c9b82e72ac067207b1d66a3112485ad8d690f32 (diff)
lib/dload: prevent large file attacks
This means creating a new struct which can pass more descriptive data from the back end sync functions to the downloader. In particular, we're interested in the download size read from the sync DB. When the remote server reports a size larger than this (via a content-length header), abort the transfer. In cases where the size is unknown, we set a hard upper limit of: * 25MiB for a sync DB * 16KiB for a signature For reference, 25MiB is more than twice the size of all of the current binary repos (with files) combined, and 16KiB is a truly gargantuan signature. Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Diffstat (limited to 'lib/libalpm/dload.h')
-rw-r--r--lib/libalpm/dload.h13
1 files changed, 11 insertions, 2 deletions
diff --git a/lib/libalpm/dload.h b/lib/libalpm/dload.h
index 351b2b30..6a2dd392 100644
--- a/lib/libalpm/dload.h
+++ b/lib/libalpm/dload.h
@@ -33,8 +33,17 @@ struct fileinfo {
double initial_size;
};
-int _alpm_download(alpm_handle_t *handle, const char *url, const char *localpath,
- char **final_file, int force, int allow_resume, int errors_ok);
+struct dload_payload {
+ char *filename;
+ char *fileurl;
+ long max_size;
+};
+
+void _alpm_dload_payload_free(struct dload_payload *payload);
+
+int _alpm_download(alpm_handle_t *handle, struct dload_payload *payload,
+ const char *localpath, char **final_file, int force, int allow_resume,
+ int errors_ok);
#endif /* _ALPM_DLOAD_H */