unit: EAP-SIM unit tests

Several unit tests for EAP-SIM functionality:
 - Get/Add attributes
 - MAC calculation
 - PRNG test

Makefile.am

@@ -136,7 +136,8 @@ unit_tests = unit/test-cmac-aes \
 		unit/test-kdf-sha256 \
 		unit/test-crypto unit/test-eapol unit/test-mpdu \
 		unit/test-ie unit/test-ssid-to-utf8 unit/test-ssid-security \
-		unit/test-arc4 unit/test-wsc unit/test-eap-mschapv2
+		unit/test-arc4 unit/test-wsc unit/test-eap-mschapv2 \
+		unit/test-eap-sim
 
 ell_pem_files = cert-ca-key.pem cert-client-key.pem cert-client-key-pkcs8.pem \
 		cert-server-key.pem cert-server-key-pkcs8.pem \
@@ -147,6 +148,17 @@ noinst_PROGRAMS += $(unit_tests)
 noinst_DATA = ell/unit/test_data
 endif
 
+unit_test_eap_sim_SOURCES = unit/test-eap-sim.c \
+		src/crypto.h src/crypto.c src/simutil.h src/simutil.c \
+		src/ie.h src/ie.c \
+		src/eapol.h src/eapol.c \
+		src/handshake.h src/handshake.c \
+		src/eap.h src/eap.c \
+		src/util.h src/util.c \
+		src/eap-sim.c
+
+unit_test_eap_sim_LDADD = ell/libell-internal.la
+
 unit_test_cmac_aes_SOURCES = unit/test-cmac-aes.c \
 					src/crypto.h src/crypto.c
 unit_test_cmac_aes_LDADD = ell/libell-internal.la

unit/test-eap-sim.c

@@ -0,0 +1,236 @@
+/*
+ *
+ *  Wireless daemon for Linux
+ *
+ *  Copyright (C) 2017  Intel Corporation. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <ell/ell.h>
+
+#include "src/simutil.h"
+
+static uint8_t attr_data[] = {
+		EAP_SIM_AT_RAND,		/* attribute type */
+		0x02,				/* length (4 * 2) == 8 bytes */
+		0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
+		EAP_SIM_AT_AUTN,		/* next attribute */
+		0x01,
+		0x0f, 0x0f,
+		EAP_SIM_AT_RES,			/* next attribute */
+		0x03,
+		0x09, 0x08, 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00
+};
+
+static void test_next_attribute(const void *data)
+{
+	struct eap_sim_tlv_iter iter;
+	/* basic attribute iteration */
+	uint8_t rand = 0, autn = 0, res = 0;
+
+	eap_sim_tlv_iter_init(&iter, attr_data, sizeof(attr_data));
+
+	while (eap_sim_tlv_iter_next(&iter)) {
+		switch (iter.tag) {
+		case EAP_SIM_AT_RAND:
+			rand = 1;
+			break;
+
+		case EAP_SIM_AT_AUTN:
+			autn = 1;
+			break;
+
+		case EAP_SIM_AT_RES:
+			res = 1;
+			break;
+
+		default:
+			assert(0);
+		}
+	}
+
+	assert(rand && autn && res);
+}
+
+static void test_add_attribute(const void *data)
+{
+	uint8_t buf[100];
+	char test[] = "test data";
+
+	/* test EAP_SIM_PAD_NONE */
+	eap_sim_add_attribute(buf, EAP_SIM_AT_RAND, EAP_SIM_PAD_NONE,
+			(uint8_t *)test, strlen(test));
+	/*
+	 * Attribute should look like:
+	 *
+	 * buf[0] = AT_RAND
+	 * buf[1] = 0x03
+	 * buf[2 - 10] = "test data"
+	 * buf[11] = 0x00	(padding)
+	 */
+
+	assert(buf[0] == EAP_SIM_AT_RAND);
+	assert(buf[1] == 3);
+	assert(!memcmp(buf + 2, test, 9));
+	assert(buf[11] == 0);
+
+	/* test EAP_SIM_PAD_ZERO */
+	memset(buf, 0, sizeof(buf));
+	eap_sim_add_attribute(buf, EAP_SIM_AT_RAND, EAP_SIM_PAD_ZERO,
+			(uint8_t *)test, strlen(test));
+	/*
+	 * Attribute should look like:
+	 *
+	 * buf[0] = AT_RAND
+	 * buf[1] = 0x04
+	 * buf[2-3] = 0x0000
+	 * buf[4-13] = "test data"
+	 * buf[14-16] = 0x000000
+	 */
+	assert(buf[0] == EAP_SIM_AT_RAND);
+	assert(buf[1] == 4);
+	assert(buf[2] == 0 && buf[3] == 0);
+	assert(!memcmp(buf + 4, test, strlen(test)));
+	assert(buf[14] == 0 && buf[15] == 0 && buf[16] == 0);
+
+	/* test EAP_SIM_PAD_LENGTH */
+	memset(buf, 0, sizeof(buf));
+	eap_sim_add_attribute(buf, EAP_SIM_AT_RAND, EAP_SIM_PAD_LENGTH,
+			(uint8_t *)test, strlen(test));
+	/*
+	 * Attribute should look like:
+	 *
+	 * buf[0] = AT_RAND
+	 * buf[1] = 0x04
+	 * buf[2-3] = 0x0009
+	 * buf[4-13] = "test data"
+	 * buf[14-16] = 0x000000
+	 */
+	assert(buf[0] == EAP_SIM_AT_RAND);
+	assert(buf[1] == 4);
+	assert(buf[2] == 0x00 && buf[3] == 0x09);
+	assert(!memcmp(buf + 4, test, strlen(test)));
+	assert(buf[14] == 0 && buf[15] == 0 && buf[16] == 0);
+
+	/* test EAP_SIM_PAD_LENGTH_BITS */
+	memset(buf, 0, sizeof(buf));
+	eap_sim_add_attribute(buf, EAP_SIM_AT_RAND, EAP_SIM_PAD_LENGTH_BITS,
+			(uint8_t *)test, strlen(test));
+	/*
+	 * Attribute should look like:
+	 *
+	 * buf[0] = AT_RAND
+	 * buf[1] = 0x04
+	 * buf[2-3] = 0x0048
+	 * buf[4-13] = "test data"
+	 * buf[14-16] = 0x000000
+	 */
+	assert(buf[0] == EAP_SIM_AT_RAND);
+	assert(buf[1] == 4);
+	assert(buf[2] == 0x00 && buf[3] == 0x48);
+	assert(!memcmp(buf + 4, test, strlen(test)));
+	assert(buf[14] == 0 && buf[15] == 0 && buf[16] == 0);
+}
+
+static uint8_t ex_pkt[] = {
+		0x02, 0x02, 0x00, 0x1c, 0x12, 0x0b, 0x00, 0x00, 0x0b, 0x05,
+		0x00, 0x00, 0xf5, 0x6d, 0x64, 0x33, 0xe6, 0x8e, 0xd2, 0x97,
+		0x6a, 0xc1, 0x19, 0x37, 0xfc, 0x3d, 0x11, 0x54 };
+
+static uint8_t ex_mac[] = {
+		0xf5, 0x6d, 0x64, 0x33, 0xe6, 0x8e, 0xd2, 0x97,
+		0x6a, 0xc1, 0x19, 0x37, 0xfc, 0x3d, 0x11, 0x54 };
+
+static uint8_t ex_sres[] = {
+		0xd1, 0xd2, 0xd3, 0xd4,
+		0xe1, 0xe2, 0xe3, 0xe4,
+		0xf1, 0xf2, 0xf3, 0xf4 };
+
+static uint8_t ex_k_aut[] = {
+		0x25, 0xaf, 0x19, 0x42, 0xef, 0xcb, 0xf4, 0xbc,
+		0x72, 0xb3, 0x94, 0x34, 0x21, 0xf2, 0xa9, 0x74 };
+
+static void test_calc_mac(const void *data)
+{
+	uint8_t pkt[100];
+	uint8_t pos = 0;
+
+	/* header */
+	memcpy(pkt, ex_pkt, 8);
+	pos += 8;
+	/* add MAC attribute */
+	pos += eap_sim_add_attribute(pkt + 8, EAP_SIM_AT_MAC, EAP_SIM_PAD_ZERO,
+			NULL, EAP_SIM_MAC_LEN);
+
+	memcpy(pkt + pos, ex_sres, 12);
+
+	eap_sim_derive_mac(pkt, sizeof(ex_pkt) + 12, ex_k_aut,
+			pkt + pos - EAP_SIM_MAC_LEN);
+
+	assert(!memcmp(ex_mac, pkt + pos - EAP_SIM_MAC_LEN, EAP_SIM_MAC_LEN));
+	assert(!memcmp(ex_pkt, pkt, sizeof(ex_pkt)));
+}
+
+static uint8_t ex_mk[] = {
+		0xe5, 0x76, 0xd5, 0xca, 0x33, 0x2e, 0x99, 0x30, 0x01, 0x8b,
+		0xf1, 0xba, 0xee, 0x27, 0x63, 0xc7, 0x95, 0xb3, 0xc7, 0x12 };
+
+static uint8_t ex_keys[] = {
+		0x53, 0x6e, 0x5e, 0xbc, 0x44, 0x65, 0x58, 0x2a, 0xa6, 0xa8,
+		0xec, 0x99, 0x86, 0xeb, 0xb6, 0x20, 0x25, 0xaf, 0x19, 0x42,
+		0xef, 0xcb, 0xf4, 0xbc, 0x72, 0xb3, 0x94, 0x34, 0x21, 0xf2,
+		0xa9, 0x74, 0x39, 0xd4, 0x5a, 0xea, 0xf4, 0xe3, 0x06, 0x01,
+		0x98, 0x3e, 0x97, 0x2b, 0x6c, 0xfd, 0x46, 0xd1, 0xc3, 0x63,
+		0x77, 0x33, 0x65, 0x69, 0x0d, 0x09, 0xcd, 0x44, 0x97, 0x6b,
+		0x52, 0x5f, 0x47, 0xd3, 0xa6, 0x0a, 0x98, 0x5e, 0x95, 0x5c,
+		0x53, 0xb0, 0x90, 0xb2, 0xe4, 0xb7, 0x37, 0x19, 0x19, 0x6a,
+		0x40, 0x25, 0x42, 0x96, 0x8f, 0xd1, 0x4a, 0x88, 0x8f, 0x46,
+		0xb9, 0xa7, 0x88, 0x6e, 0x44, 0x88, 0x59, 0x49, 0xea, 0xb0,
+		0xff, 0xf6, 0x9d, 0x52, 0x31, 0x5c, 0x6c, 0x63, 0x4f, 0xd1,
+		0x4a, 0x7f, 0x0d, 0x52, 0x02, 0x3d, 0x56, 0xf7, 0x96, 0x98,
+		0xfa, 0x65, 0x96, 0xab, 0xee, 0xd4, 0xf9, 0x3f, 0xbb, 0x48,
+		0xeb, 0x53, 0x4d, 0x98, 0x54, 0x14, 0xce, 0xed, 0x0d, 0x9a,
+		0x8e, 0xd3, 0x3c, 0x38, 0x7c, 0x9d, 0xfd, 0xab, 0x92, 0xff,
+		0xbd, 0xf2, 0x40, 0xfc, 0xec, 0xf6, 0x5a, 0x2c, 0x93, 0xb9 };
+
+static void test_prng(const void *data)
+{
+	uint8_t prng_buf[160];
+
+	eap_sim_fips_prf((uint8_t *)ex_mk, 20, prng_buf, sizeof(ex_keys));
+
+	assert(!memcmp(prng_buf, (uint8_t *)ex_keys, sizeof(ex_keys)));
+}
+
+int main(int argc, char *argv[])
+{
+	l_test_init(&argc, &argv);
+
+	l_test_add("EAP-SIM next attribute test", test_next_attribute, NULL);
+	l_test_add("EAP-SIM add attribute test", test_add_attribute, NULL);
+	l_test_add("EAP-SIM calculate MAC test", test_calc_mac, NULL);
+	l_test_add("EAP-SIM PRNG test", test_prng, NULL);
+
+	return l_test_run();
+}