EAP-FAST: Allow empty PAC file to be used

Even if the PAC file does not start with the proper header line, allow
the file to be used if it is empty. [Bug 423]

Signed-hostap: Jouni Malinen <j@w1.fi>

diff --git a/src/eap_peer/eap_fast_pac.c b/src/eap_peer/eap_fast_pac.c
index fc987da10983e8b2ca0b9e9f97215f34c932ed2c..8c480b967974df50711fce931866b580f72281f0 100644 (file)
--- a/src/eap_peer/eap_fast_pac.c
+++ b/src/eap_peer/eap_fast_pac.c
@@ -422,8 +422,12 @@ int eap_fast_load_pac(struct eap_sm *sm, struct eap_fast_pac **pac_root,
        if (eap_fast_init_pac_data(sm, pac_file, &rc) < 0)
                return 0;
 
-       if (eap_fast_read_line(&rc, &pos) < 0 ||
-           os_strcmp(pac_file_hdr, rc.buf) != 0)
+       if (eap_fast_read_line(&rc, &pos) < 0) {
+               /* empty file - assume it is fine to overwrite */
+               eap_fast_deinit_pac_data(&rc);
+               return 0;
+       }
+       if (os_strcmp(pac_file_hdr, rc.buf) != 0)
                err = "Unrecognized header line";
 
        while (!err && eap_fast_read_line(&rc, &pos) == 0) {