[test] Add self-tests for SHA-256 algorithm

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/tests/sha256_test.c

@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/** @file
+ *
+ * SHA-256 tests
+ *
+ */
+
+#include <stdint.h>
+#include <ipxe/sha256.h>
+#include <ipxe/test.h>
+#include "digest_test.h"
+
+/** An SHA-256 test vector */
+struct sha256_test_vector {
+	/** Test data */
+	void *data;
+	/** Test data length */
+	size_t len;
+	/** Expected digest */
+	uint8_t digest[SHA256_DIGEST_SIZE];
+};
+
+/** SHA-256 test vectors */
+static struct sha256_test_vector sha256_test_vectors[] = {
+	/* Empty test data
+	 *
+	 * Expected digest value obtained from "sha256sum /dev/null"
+	 */
+	{ NULL, 0,
+	  { 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4,
+	    0xc8, 0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b,
+	    0x93, 0x4c, 0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55 } },
+	/* Test data and expected digests taken from the NIST
+	 * Cryptographic Toolkit Algorithm Examples at
+	 * http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA256.pdf
+	 */
+	{ "abc", 3,
+	  { 0xba, 0x78, 0x16, 0xbf, 0x8f, 0x01, 0xcf, 0xea, 0x41, 0x41, 0x40,
+	    0xde, 0x5d, 0xae, 0x22, 0x23, 0xb0, 0x03, 0x61, 0xa3, 0x96, 0x17,
+	    0x7a, 0x9c, 0xb4, 0x10, 0xff, 0x61, 0xf2, 0x00, 0x15, 0xad } },
+	{ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56,
+	  { 0x24, 0x8d, 0x6a, 0x61, 0xd2, 0x06, 0x38, 0xb8, 0xe5, 0xc0, 0x26,
+	    0x93, 0x0c, 0x3e, 0x60, 0x39, 0xa3, 0x3c, 0xe4, 0x59, 0x64, 0xff,
+	    0x21, 0x67, 0xf6, 0xec, 0xed, 0xd4, 0x19, 0xdb, 0x06, 0xc1 } },
+};
+
+/** SHA-256 test fragment lists */
+static struct digest_test_fragments sha256_test_fragments[] = {
+	{ { 0, -1UL, } },
+	{ { 1, 1, 1, 1, 1, 1, 1, 1 } },
+	{ { 2, 0, 23, 4, 6, 1, 0 } },
+};
+
+/**
+ * Perform SHA-256 self-test
+ *
+ */
+static void sha256_test_exec ( void ) {
+	struct digest_algorithm *digest = &sha256_algorithm;
+	struct sha256_test_vector *test;
+	unsigned int i;
+	unsigned int j;
+
+	for ( i = 0 ; i < ( sizeof ( sha256_test_vectors ) /
+			    sizeof ( sha256_test_vectors[0] ) ) ; i++ ) {
+		test = &sha256_test_vectors[i];
+		/* Test with a single pass */
+		digest_ok ( digest, NULL, test->data, test->len, test->digest );
+		/* Test with fragment lists */
+		for ( j = 0 ; j < ( sizeof ( sha256_test_fragments ) /
+				    sizeof ( sha256_test_fragments[0] )); j++ ){
+			digest_ok ( digest, &sha256_test_fragments[j],
+				    test->data, test->len, test->digest );
+		}
+	}
+}
+
+/** SHA-256 self-test */
+struct self_test sha256_test __self_test = {
+	.name = "sha256",
+	.exec = sha256_test_exec,
+};

src/tests/tests.c

@@ -28,5 +28,6 @@ FILE_LICENCE ( GPL2_OR_LATER );
 REQUIRE_OBJECT ( list_test );
 REQUIRE_OBJECT ( byteswap_test );
 REQUIRE_OBJECT ( sha1_test );
+REQUIRE_OBJECT ( sha256_test );
 REQUIRE_OBJECT ( hmac_drbg_test );
 REQUIRE_OBJECT ( hash_df_test );