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/lib/source/utils.c b/ext/tinycrypt/lib/source/utils.c
new file mode 100644
index 0000000..147d8d4
--- /dev/null
+++ b/ext/tinycrypt/lib/source/utils.c
@@ -0,0 +1,75 @@
+/* utils.c - TinyCrypt platform-dependent run-time operations */
+
+/*
+ * 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.
+ */
+
+#include <tinycrypt/utils.h>
+#include <tinycrypt/constants.h>
+
+#include <string.h>
+
+#define MASK_MOST_SIG_BIT 0x80
+#define MASK_TWENTY_SEVEN 0x1b
+
+uint32_t _copy(uint8_t *to, uint32_t to_len,
+ const uint8_t *from, uint32_t from_len)
+{
+ if (from_len <= to_len) {
+ (void)memcpy(to, from, from_len);
+ return from_len;
+ } else {
+ return TC_CRYPTO_FAIL;
+ }
+}
+
+void _set(void *to, uint8_t val, uint32_t len)
+{
+ (void)memset(to, val, len);
+}
+
+/*
+ * Doubles the value of a byte for values up to 127.
+ */
+uint8_t _double_byte(uint8_t a)
+{
+ return ((a<<1) ^ ((a>>7) * MASK_TWENTY_SEVEN));
+}
+
+int32_t _compare(const uint8_t *a, const uint8_t *b, size_t size)
+{
+ const uint8_t *tempa = a;
+ const uint8_t *tempb = b;
+ uint8_t result = 0;
+
+ for (uint32_t i = 0; i < size; i++) {
+ result |= tempa[i] ^ tempb[i];
+ }
+ return result;
+}