passkey: Skip processing non-passkey mapping data

In the AD case, the user altSecurityIdentities attribute can
store passkey, smartcard, of ssh public key mapping data. Check
to ensure we are handling passkey data before continuing in
PAM passkey processing.

Resolves: #7061

src/responder/pam/pamsrv_passkey.c

@@ -489,6 +489,20 @@ errno_t process_passkey_data(TALLOC_CTX *mem_ctx,
         goto done;
     }
 
+    /* Don't try to process smartcard of sshpubkey mapping data */
+    ret = split_on_separator(tmp_ctx, (const char *) el->values[0].data, ':', true, true,
+                             &mappings, NULL);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_OP_FAILURE, "Incorrectly formatted passkey data [%d]: %s\n",
+                                 ret, sss_strerror(ret));
+        ret = ENOENT;
+        goto done;
+    } else if (strcasecmp(mappings[0], "passkey") != 0) {
+        DEBUG(SSSDBG_OP_FAILURE, "Mapping data found is not passkey related\n");
+        ret = ENOENT;
+        goto done;
+    }
+
     kh_mappings = talloc_zero_array(tmp_ctx, const char *, el->num_values + 1);
     if (kh_mappings == NULL) {
         DEBUG(SSSDBG_OP_FAILURE, "talloc_zero_array failed.\n");
@@ -624,7 +638,10 @@ void pam_passkey_get_user_done(struct tevent_req *req)
     /* Get passkey data */
     DEBUG(SSSDBG_TRACE_ALL, "Processing passkey data\n");
     ret = process_passkey_data(pk_data, result->msgs[0], domain_name, pk_data);
-    if (ret == ENOENT) {
+    if (ret != EOK) {
+        DEBUG(SSSDBG_OP_FAILURE,
+              "process_passkey_data failed: [%d]: %s\n",
+              ret, sss_strerror(ret));
         goto done;
     }