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authorJouni Malinen <j@w1.fi>2012-06-28 17:42:50 (GMT)
committerJouni Malinen <j@w1.fi>2012-06-28 18:01:37 (GMT)
commit40a5e3bfde0170f5fcbb38375c15c5f15f33bc7c (patch)
tree382a3c1203ae1e8dfa78b73ba94594c12c1b59e2 /wpa_supplicant
parent72df0cd28ce14432a650f13ed9011853ba0df659 (diff)
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WPS: Add a standalone tool for building NFC password tokens
nfc_pw_token can be used to build random NFC password token for WPS. This tool prints out the wpa_supplicant.conf (or hostapd.conf) parameters and the hexdump of the WPS password token (with and without NDEF encapsulation) so that it can be written to a NFC tag with an external program. Signed-hostap: Jouni Malinen <j@w1.fi>
Diffstat (limited to 'wpa_supplicant')
-rw-r--r--wpa_supplicant/Makefile9
-rw-r--r--wpa_supplicant/nfc_pw_token.c83
2 files changed, 92 insertions, 0 deletions
diff --git a/wpa_supplicant/Makefile b/wpa_supplicant/Makefile
index dc6af35..6756e54 100644
--- a/wpa_supplicant/Makefile
+++ b/wpa_supplicant/Makefile
@@ -1366,6 +1366,10 @@ ifndef CONFIG_AP
OBJS_t += ../src/utils/ip_addr.o
endif
OBJS_t2 := $(OBJS) $(OBJS_l2) preauth_test.o
+
+OBJS_nfc := $(OBJS) $(OBJS_l2) nfc_pw_token.o
+OBJS_nfc += $(OBJS_d) ../src/drivers/drivers.o
+
OBJS += $(CONFIG_MAIN).o
ifdef CONFIG_PRIVSEP
@@ -1474,6 +1478,10 @@ test_wpa: $(OBJS_wpa) $(OBJS_h)
$(Q)$(LDO) $(LDFLAGS) -o test_wpa $(OBJS_wpa) $(LIBS)
@$(E) " LD " $@
+nfc_pw_token: $(OBJS_nfc)
+ $(Q)$(LDO) $(LDFLAGS) -o nfc_pw_token $(OBJS_nfc) $(LIBS)
+ @$(E) " LD " $@
+
win_if_list: win_if_list.c
$(Q)$(LDO) $(LDFLAGS) -o $@ win_if_list.c $(CFLAGS) $(LIBS_w)
@$(E) " LD " $@
@@ -1556,5 +1564,6 @@ clean:
$(MAKE) -C dbus clean
rm -f core *~ *.o *.d eap_*.so $(ALL) $(WINALL) eapol_test preauth_test
rm -f wpa_priv
+ rm -f nfc_pw_token
-include $(OBJS:%.o=%.d)
diff --git a/wpa_supplicant/nfc_pw_token.c b/wpa_supplicant/nfc_pw_token.c
new file mode 100644
index 0000000..11afb5b
--- /dev/null
+++ b/wpa_supplicant/nfc_pw_token.c
@@ -0,0 +1,83 @@
+/*
+ * nfc_pw_token - Tool for building NFC password tokens for WPS
+ * Copyright (c) 2012, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "includes.h"
+
+#include "utils/common.h"
+#include "crypto/random.h"
+#include "wpa_supplicant_i.h"
+#include "config.h"
+#include "wps_supplicant.h"
+
+
+static void print_bin(const char *title, const struct wpabuf *buf)
+{
+ size_t i, len;
+ const u8 *pos;
+
+ if (buf == NULL)
+ return;
+
+ printf("%s=", title);
+
+ pos = wpabuf_head(buf);
+ len = wpabuf_len(buf);
+ for (i = 0; i < len; i++)
+ printf("%02X", *pos++);
+
+ printf("\n");
+}
+
+
+int main(int argc, char *argv[])
+{
+ struct wpa_supplicant wpa_s;
+ int ret = -1;
+ struct wpabuf *buf = NULL, *ndef = NULL;
+ char txt[1000];
+
+ if (os_program_init())
+ return -1;
+ random_init(NULL);
+
+ os_memset(&wpa_s, 0, sizeof(wpa_s));
+ wpa_s.conf = os_zalloc(sizeof(*wpa_s.conf));
+ if (wpa_s.conf == NULL)
+ goto fail;
+
+ buf = wpas_wps_nfc_token(&wpa_s, 0);
+ if (buf == NULL)
+ goto fail;
+
+ ndef = ndef_build_wifi(buf);
+ if (ndef == NULL)
+ goto fail;
+
+ wpa_snprintf_hex_uppercase(txt, sizeof(txt), wpabuf_head(buf),
+ wpabuf_len(buf));
+ printf("#WPS=%s\n", txt);
+
+ wpa_snprintf_hex_uppercase(txt, sizeof(txt), wpabuf_head(ndef),
+ wpabuf_len(ndef));
+ printf("#NDEF=%s\n", txt);
+
+ printf("wps_nfc_dev_pw_id=%d\n", wpa_s.conf->wps_nfc_dev_pw_id);
+ print_bin("wps_nfc_dh_pubkey", wpa_s.conf->wps_nfc_dh_pubkey);
+ print_bin("wps_nfc_dh_privkey", wpa_s.conf->wps_nfc_dh_privkey);
+ print_bin("wps_nfc_dev_pw", wpa_s.conf->wps_nfc_dev_pw);
+
+ ret = 0;
+fail:
+ wpabuf_free(ndef);
+ wpabuf_free(buf);
+ wpa_config_free(wpa_s.conf);
+ random_deinit();
+ os_program_deinit();
+
+ return ret;
+}