unit: Add SHA-256 based KDF unit test

Makefile.am

@@ -98,6 +98,7 @@ tools_hwsim_LDADD = ell/libell-internal.la
 unit_tests = unit/test-cmac-aes \
 		unit/test-hmac-md5 unit/test-hmac-sha1 unit/test-hmac-sha256 \
 		unit/test-pbkdf2-sha1 unit/test-prf-sha1 \
+		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
@@ -140,6 +141,10 @@ unit_test_prf_sha1_SOURCES = unit/test-prf-sha1.c \
 					src/crypto.h src/crypto.c
 unit_test_prf_sha1_LDADD = ell/libell-internal.la
 
+unit_test_kdf_sha256_SOURCES = unit/test-kdf-sha256.c \
+					src/crypto.h src/crypto.c
+unit_test_kdf_sha256_LDADD = ell/libell-internal.la
+
 unit_test_ie_SOURCES = unit/test-ie.c src/ie.h src/ie.c
 unit_test_ie_LDADD = ell/libell-internal.la
 

unit/test-kdf-sha256.c

@@ -0,0 +1,91 @@
+/*
+ *
+ *  Wireless daemon for Linux
+ *
+ *  Copyright (C) 2013-2016  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/crypto.h"
+
+struct kdf_data {
+	const char *key;
+	unsigned int key_len;
+	const char *prefix;
+	unsigned int prefix_len;
+	const char *data;
+	unsigned int data_len;
+	const char *kdf;
+};
+
+static void kdf_test(const void *data)
+{
+	const struct kdf_data *test = data;
+	unsigned int kdf_len;
+	unsigned char output[512];
+	char kdf[128];
+	unsigned int i;
+	bool result;
+
+	kdf_len = strlen(test->kdf) / 2;
+
+	printf("PRF    = %s (%d octects)\n", test->kdf, kdf_len);
+
+	result = kdf_sha256(test->key, test->key_len, test->prefix,
+				test->prefix_len, test->data, test->data_len,
+						output, kdf_len);
+
+	assert(result == true);
+
+	for (i = 0; i < kdf_len; i++)
+		sprintf(kdf + (i * 2), "%02x", output[i]);
+
+	printf("Result = %s\n", kdf);
+
+	assert(strcmp(test->kdf, kdf) == 0);
+}
+
+static const struct kdf_data test_case_1 = {
+	.key		= "abc",
+	.key_len	= 3,
+	.prefix		= "KDF test",
+	.prefix_len	= 8,
+	.data		= "data",
+	.data_len	= 4,
+	.kdf		= "9efd6eb02758cb73"
+			  "70a86f8a305375d4"
+			  "1f8f21c2e47447f5"
+			  "84f7d2291143d4d4",
+};
+
+int main(int argc, char *argv[])
+{
+	l_test_init(&argc, &argv);
+
+	l_test_add("/kdf-sha256/Test case 1", kdf_test, &test_case_1);
+
+	return l_test_run();
+}