ext: Pull in tinycrypt v0.2.6

Zephyr 1.9 moves to tinycrypt v0.2.7.  This introduces a breaking API
change.  This makes things challenging for mcuboot, which would like to
be able to work across multiple platforms.

To help with this, bring in the last working version of Tinycrypt v0.2.6
from https://github.com/01org/tinycrypt.  Tinycrypt is released under a
3-clause BSD-style license, with parts under the micro-ecc license,
which is a 2-clause license.  Please see ext/tinycrypt/LICENSE for
details.

Signed-off-by: David Brown <david.brown@linaro.org>
diff --git a/ext/tinycrypt/tests/test_sha256.c b/ext/tinycrypt/tests/test_sha256.c
new file mode 100644
index 0000000..5da973f
--- /dev/null
+++ b/ext/tinycrypt/tests/test_sha256.c
@@ -0,0 +1,506 @@
+/*  test_sha256.c - TinyCrypt implementation of some SHA-256 tests */
+
+/*
+ *  Copyright (C) 2015 by Intel Corporation, All Rights Reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are met:
+ *
+ *    - Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *
+ *    - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ *    - Neither the name of Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *  POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+  DESCRIPTION
+  This module tests the following SHA256 routines:
+
+  Scenarios tested include:
+  - NIST SHA256 test vectors
+*/
+
+#include <tinycrypt/sha256.h>
+#include <tinycrypt/constants.h>
+#include <test_utils.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+
+/*
+ * NIST SHA256 test vector 1.
+ */
+uint32_t test_1(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #1:\n");
+        const uint8_t expected[32] = {
+	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
+        };
+        const char *m = "abc";
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, (const uint8_t *) m, strlen(m));
+        (void)tc_sha256_final(digest, &s);
+        result = check_result(1, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+/*
+ * NIST SHA256 test vector 2.
+ */
+uint32_t test_2(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #2:\n");
+        const uint8_t expected[32] = {
+	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
+        };
+        const char *m = "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq";
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, (const uint8_t *) m, strlen(m));
+        (void) tc_sha256_final(digest, &s);
+
+        result = check_result(2, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_3(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #3:\n");
+        const uint8_t expected[32] = {
+	0x68, 0x32, 0x57, 0x20, 0xaa, 0xbd, 0x7c, 0x82, 0xf3, 0x0f, 0x55, 0x4b,
+	0x31, 0x3d, 0x05, 0x70, 0xc9, 0x5a, 0xcc, 0xbb, 0x7d, 0xc4, 0xb5, 0xaa,
+	0xe1, 0x12, 0x04, 0xc0, 0x8f, 0xfe, 0x73, 0x2b
+        };
+        const uint8_t m[1] = { 0xbd };
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, m, sizeof(m));
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(3, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_4(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #4:\n");
+        const uint8_t expected[32] = {
+	0x7a, 0xbc, 0x22, 0xc0, 0xae, 0x5a, 0xf2, 0x6c, 0xe9, 0x3d, 0xbb, 0x94,
+	0x43, 0x3a, 0x0e, 0x0b, 0x2e, 0x11, 0x9d, 0x01, 0x4f, 0x8e, 0x7f, 0x65,
+	0xbd, 0x56, 0xc6, 0x1c, 0xcc, 0xcd, 0x95, 0x04
+        };
+        const uint8_t m[4] = { 0xc9, 0x8c, 0x8e, 0x55 };
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, m, sizeof(m));
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(4, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_5(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #5:\n");
+        const uint8_t expected[32] = {
+	0x02, 0x77, 0x94, 0x66, 0xcd, 0xec, 0x16, 0x38, 0x11, 0xd0, 0x78, 0x81,
+	0x5c, 0x63, 0x3f, 0x21, 0x90, 0x14, 0x13, 0x08, 0x14, 0x49, 0x00, 0x2f,
+	0x24, 0xaa, 0x3e, 0x80, 0xf0, 0xb8, 0x8e, 0xf7
+        };
+        uint8_t m[55];
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)memset(m, 0x00, sizeof(m));
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, m, sizeof(m));
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(5, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_6(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #6:\n");
+        const uint8_t expected[32] = {
+	0xd4, 0x81, 0x7a, 0xa5, 0x49, 0x76, 0x28, 0xe7, 0xc7, 0x7e, 0x6b, 0x60,
+	0x61, 0x07, 0x04, 0x2b, 0xbb, 0xa3, 0x13, 0x08, 0x88, 0xc5, 0xf4, 0x7a,
+	0x37, 0x5e, 0x61, 0x79, 0xbe, 0x78, 0x9f, 0xbb
+        };
+        uint8_t m[56];
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)memset(m, 0x00, sizeof(m));
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, m, sizeof(m));
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(6, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_7(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #7:\n");
+        const uint8_t expected[32] = {
+	0x65, 0xa1, 0x6c, 0xb7, 0x86, 0x13, 0x35, 0xd5, 0xac, 0xe3, 0xc6, 0x07,
+	0x18, 0xb5, 0x05, 0x2e, 0x44, 0x66, 0x07, 0x26, 0xda, 0x4c, 0xd1, 0x3b,
+	0xb7, 0x45, 0x38, 0x1b, 0x23, 0x5a, 0x17, 0x85
+        };
+        uint8_t m[57];
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)memset(m, 0x00, sizeof(m));
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, m, sizeof(m));
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(7, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_8(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #8:\n");
+        const uint8_t expected[32] = {
+	0xf5, 0xa5, 0xfd, 0x42, 0xd1, 0x6a, 0x20, 0x30, 0x27, 0x98, 0xef, 0x6e,
+	0xd3, 0x09, 0x97, 0x9b, 0x43, 0x00, 0x3d, 0x23, 0x20, 0xd9, 0xf0, 0xe8,
+	0xea, 0x98, 0x31, 0xa9, 0x27, 0x59, 0xfb, 0x4b
+        };
+        uint8_t m[64];
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)memset(m, 0x00, sizeof(m));
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, m, sizeof(m));
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(8, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_9(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #9:\n");
+        const uint8_t expected[32] = {
+	0x54, 0x1b, 0x3e, 0x9d, 0xaa, 0x09, 0xb2, 0x0b, 0xf8, 0x5f, 0xa2, 0x73,
+	0xe5, 0xcb, 0xd3, 0xe8, 0x01, 0x85, 0xaa, 0x4e, 0xc2, 0x98, 0xe7, 0x65,
+	0xdb, 0x87, 0x74, 0x2b, 0x70, 0x13, 0x8a, 0x53
+        };
+        uint8_t m[1000];
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)memset(m, 0x00, sizeof(m));
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, m, sizeof(m));
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(9, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_10(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #10:\n");
+        const uint8_t expected[32] = {
+	0xc2, 0xe6, 0x86, 0x82, 0x34, 0x89, 0xce, 0xd2, 0x01, 0x7f, 0x60, 0x59,
+	0xb8, 0xb2, 0x39, 0x31, 0x8b, 0x63, 0x64, 0xf6, 0xdc, 0xd8, 0x35, 0xd0,
+	0xa5, 0x19, 0x10, 0x5a, 0x1e, 0xad, 0xd6, 0xe4
+        };
+        uint8_t m[1000];
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)memset(m, 0x41, sizeof(m));
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, m, sizeof(m));
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(10, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_11(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #11:\n");
+        const uint8_t expected[32] = {
+	0xf4, 0xd6, 0x2d, 0xde, 0xc0, 0xf3, 0xdd, 0x90, 0xea, 0x13, 0x80, 0xfa,
+	0x16, 0xa5, 0xff, 0x8d, 0xc4, 0xc5, 0x4b, 0x21, 0x74, 0x06, 0x50, 0xf2,
+	0x4a, 0xfc, 0x41, 0x20, 0x90, 0x35, 0x52, 0xb0
+        };
+        uint8_t m[1005];
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+
+        (void)memset(m, 0x55, sizeof(m));
+
+        (void)tc_sha256_init(&s);
+        tc_sha256_update(&s, m, sizeof(m));
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(11, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_12(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #12:\n");
+        const uint8_t expected[32] = {
+	0xd2, 0x97, 0x51, 0xf2, 0x64, 0x9b, 0x32, 0xff, 0x57, 0x2b, 0x5e, 0x0a,
+	0x9f, 0x54, 0x1e, 0xa6, 0x60, 0xa5, 0x0f, 0x94, 0xff, 0x0b, 0xee, 0xdf,
+	0xb0, 0xb6, 0x92, 0xb9, 0x24, 0xcc, 0x80, 0x25
+        };
+        uint8_t m[1000];
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+        uint32_t i;
+
+        (void)memset(m, 0x00, sizeof(m));
+
+        (void)tc_sha256_init(&s);
+        for (i = 0; i < 1000; ++i) {
+                tc_sha256_update(&s, m, sizeof(m));
+        }
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(12, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_13(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #13:\n");
+        const uint8_t expected[32] = {
+	0x15, 0xa1, 0x86, 0x8c, 0x12, 0xcc, 0x53, 0x95, 0x1e, 0x18, 0x23, 0x44,
+	0x27, 0x74, 0x47, 0xcd, 0x09, 0x79, 0x53, 0x6b, 0xad, 0xcc, 0x51, 0x2a,
+	0xd2, 0x4c, 0x67, 0xe9, 0xb2, 0xd4, 0xf3, 0xdd
+        };
+        uint8_t m[32768];
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+        uint32_t i;
+
+        (void)memset(m, 0x5a, sizeof(m));
+
+        (void)tc_sha256_init(&s);
+        for (i = 0; i < 16384; ++i) {
+                tc_sha256_update(&s, m, sizeof(m));
+        }
+        (void)tc_sha256_final(digest, &s);
+
+        result = check_result(13, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+uint32_t test_14(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_PRINT("SHA256 test #14:\n");
+        const uint8_t expected[32] = {
+	0x46, 0x1c, 0x19, 0xa9, 0x3b, 0xd4, 0x34, 0x4f, 0x92, 0x15, 0xf5, 0xec,
+	0x64, 0x35, 0x70, 0x90, 0x34, 0x2b, 0xc6, 0x6b, 0x15, 0xa1, 0x48, 0x31,
+	0x7d, 0x27, 0x6e, 0x31, 0xcb, 0xc2, 0x0b, 0x53
+        };
+        uint8_t m[32768];
+        uint8_t digest[32];
+        struct tc_sha256_state_struct s;
+        uint32_t i;
+
+        (void)memset(m, 0x00, sizeof(m));
+
+        (void) tc_sha256_init(&s);
+        for (i = 0; i < 33280; ++i) {
+                tc_sha256_update(&s, m, sizeof(m));
+        }
+        (void) tc_sha256_final(digest, &s);
+
+        result = check_result(14, expected, sizeof(expected),
+			      digest, sizeof(digest));
+        TC_END_RESULT(result);
+        return result;
+}
+
+/*
+ * Main task to test AES
+ */
+
+int main(void)
+{
+        uint32_t result = TC_PASS;
+
+        TC_START("Performing SHA256 tests (NIST tests vectors):");
+
+        result = test_1();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #1 failed.\n");
+                goto exitTest;
+        }
+        result = test_2();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #2 failed.\n");
+                goto exitTest;
+        }
+        result = test_3();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #3 failed.\n");
+                goto exitTest;
+        }
+        result = test_4();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #4 failed.\n");
+                goto exitTest;
+        }
+        result = test_5();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #5 failed.\n");
+                goto exitTest;
+        }
+        result = test_6();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #6 failed.\n");
+                goto exitTest;
+        }
+        result = test_7();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #7 failed.\n");
+                goto exitTest;
+        }
+        result = test_8();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #8 failed.\n");
+                goto exitTest;
+        }
+        result = test_9();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #9 failed.\n");
+                goto exitTest;
+        }
+        result = test_10();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #10 failed.\n");
+                goto exitTest;
+        }
+        result = test_11();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #11 failed.\n");
+                goto exitTest;
+        }
+        result = test_12();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #12 failed.\n");
+                goto exitTest;
+        }
+        result = test_13();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #13 failed.\n");
+                goto exitTest;
+        }
+        result = test_14();
+        if (result == TC_FAIL) { /* terminate test */
+                TC_ERROR("SHA256 test #14 failed.\n");
+                goto exitTest;
+        }
+
+        TC_PRINT("All SHA256 tests succeeded!\n");
+
+exitTest:
+        TC_END_RESULT(result);
+        TC_END_REPORT(result);
+}