Overview

Low Level MicroEJ Security API implementation for MbedTLS.

This component implements the LLSEC Low Level API for MicroEJ platforms connected to a Board Support Package based on MbedTLS.

Usage

Add the following line to your module.ivy file:

<dependency org="com.microej.clibrary.llimpl" name="security-mbedtls" rev="..."/>

Requirements

N/A

Validation

Here is a non exhaustive list of tested environments:

• Hardware
  • Espressif ESP-WROVER-KIT V4.1
• Compilers / Integrated Development Environments:
  • Espressif IoT Development Framework (esp-idf) v3.3.4 and v4.3.2 (using GNU GCC toolchain)
  • IAR Embedded Workbench 9.30.1
• MbedTLS versions:
  • MbedTLS v2.16.5, v2.16.11, v2.28.0, v2.28.1 and v3.2.1

MISRA Compliance

This Abstraction Layer implementation is MISRA-compliant (MISRA C:2012) with some noted exception. It has been verified with Cppcheck v2.10. Here is the list of deviations from MISRA standard:

Deviation	Category	Justification
Rule 2.3	Advisory	A type can be defined at API level and not used by the application
Rule 2.4	Advisory	A tag can be defined at API level and not used by the application
Rule 2.5	Advisory	A macro can be defined at API level and not used by the application
Rule 8.4	Required	The Cppcheck analysis is made only on this LL code
Rule 11.3	Required	Cast for matching MbedTLS function signature
Rule 11.4	Advisory	Abstract data type for SNI usage
Rule 11.5	Advisory	Abstract data type for SNI usage
Rule 19.2	Advisory	Using union is useful for C library design
Rule 21.3	Required	Usage forced by MbedTLS library (mbedtls_calloc / mbedtls_free)

Dependencies

• MicroEJ Architecture 7.x or higher.
• MbedTLS v2.16.5 or higher.
• Foundation library Security v1.5.0

Source

N/A

Restrictions

None.

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Copyright 2021-2024 MicroEJ Corp. All rights reserved. Use of this source code is governed by a BSD-style license that can be found with this software.