bootutil/crypto: Fix the common.h header

The crypto/common.h header checks for MBEDTLS_VERSION_NUMBER
value but it needs to include mbedtls/version.h first
otherwise it won't return a reliable check.

Signed-off-by: Antonio de Angelis <Antonio.deAngelis@arm.com>
Change-Id: Ice12fe26bb24fd98c09c4adfe001b5274cee555c

boot/bootutil/include/bootutil/crypto/common.h

@@ -7,9 +7,10 @@
 #ifndef __BOOTUTIL_CRYPTO_COMMON_H__
 #define __BOOTUTIL_CRYPTO_COMMON_H__
 
-/* TODO May need to update this in a future 3.x version of Mbed TLS.
- * Extract a member of the mbedtls context structure.
+/* The check below can be performed even for those cases
+ * where MCUBOOT_USE_MBED_TLS has not been defined
  */
+#include "mbedtls/version.h"
 #if MBEDTLS_VERSION_NUMBER >= 0x03000000
 #define MBEDTLS_CONTEXT_MEMBER(X) MBEDTLS_PRIVATE(X)
 #else

ext/mbedtls-asn1/include/mbedtls/version.h

@@ -0,0 +1,90 @@
+/**
+ * \file version.h
+ *
+ * \brief Run-time version information
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+/*
+ * This set of run-time variables can be used to determine the version number of
+ * the Mbed TLS library used. Compile-time version defines for the same can be
+ * found in build_info.h
+ */
+#ifndef MBEDTLS_VERSION_H
+#define MBEDTLS_VERSION_H
+
+#include "mbedtls/build_info.h"
+
+#if defined(MBEDTLS_VERSION_C)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Get the version number.
+ *
+ * \return          The constructed version number in the format
+ *                  MMNNPP00 (Major, Minor, Patch).
+ */
+unsigned int mbedtls_version_get_number( void );
+
+/**
+ * Get the version string ("x.y.z").
+ *
+ * \param string    The string that will receive the value.
+ *                  (Should be at least 9 bytes in size)
+ */
+void mbedtls_version_get_string( char *string );
+
+/**
+ * Get the full version string ("mbed TLS x.y.z").
+ *
+ * \param string    The string that will receive the value. The mbed TLS version
+ *                  string will use 18 bytes AT MOST including a terminating
+ *                  null byte.
+ *                  (So the buffer should be at least 18 bytes to receive this
+ *                  version string).
+ */
+void mbedtls_version_get_string_full( char *string );
+
+/**
+ * \brief           Check if support for a feature was compiled into this
+ *                  mbed TLS binary. This allows you to see at runtime if the
+ *                  library was for instance compiled with or without
+ *                  Multi-threading support.
+ *
+ * \note            only checks against defines in the sections "System
+ *                  support", "mbed TLS modules" and "mbed TLS feature
+ *                  support" in mbedtls_config.h
+ *
+ * \param feature   The string for the define to check (e.g. "MBEDTLS_AES_C")
+ *
+ * \return          0 if the feature is present,
+ *                  -1 if the feature is not present and
+ *                  -2 if support for feature checking as a whole was not
+ *                  compiled in.
+ */
+int mbedtls_version_check_feature( const char *feature );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_VERSION_C */
+
+#endif /* version.h */