[Encrypted IMSI] Add support for EAP Method prefix
Add support for EAP method prefix in the anonymous identity
used during EAP-SIM/AKA/AKA' authentication when encrypted IMSI
is used. The prefix is a single character that indicates which
EAP method is required by the client.
Bug: 142915637
Test: Manual test
Change-Id: I0b439590ed4b73aca2b9c139a7ae4b24af1370a7
diff --git a/src/eap_common/eap_sim_common.c b/src/eap_common/eap_sim_common.c
index 1e0f808..4a93244 100644
--- a/src/eap_common/eap_sim_common.c
+++ b/src/eap_common/eap_sim_common.c
@@ -1219,6 +1219,10 @@
os_memcmp(id, anonymous_id_prefix, anonymous_id_len) == 0)
return 1; /* 'anonymous@realm' */
+ if (id_len > anonymous_id_len + 1 &&
+ os_memcmp(id + 1, anonymous_id_prefix, anonymous_id_len) == 0)
+ return 1; /* 'Xanonymous@realm' where X is an EAP method code */
+
if (id_len > 1 && id[0] == '@')
return 1; /* '@realm' */