- mbed-tls - lists.trustedfirmware.org

by Frank Bergmann

Hi all, I have some questions. 1) If you have an established TLS connection (mbed TLS 3.x) and while the connection is up the (server-) certificate expires: Will the connection stay up? Or is a new handshake (with valid cert) REQUIRED? 2) Related to question 1: CAN mbed TLS switch to a new cert on an existing TLS connection? (e.g. by doing another handshake from server OR client side) 3) With 3.x some struct members are now "private". Even if you can allow private access by a define it would be better to use a getter. But for ssl context's "state" I am missing this and also for "p_bio" (to access fd). Is there a chance to get this implemented? BTW - a big "LIKE" for 3.x! I really appreciate the changes. Thank you! kind regards, Frank

2 years, 11 months

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inline assembly MULADDC_CORE for Cortex M4

by Work Only

Hello everyone, Can anyone share some example code or hints on writing MULADDC_CORE for Cortex M4 in bn_mul.h? With Many thanks! Wade

2 years, 11 months

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Reminder: MBed TLS Technical Forum - US/Europe

by Don Harbin

Hi All, A gentle reminder that the US-Europe timezone-friendly MBed TLS Tech forum is tomorrow (Monday) at 4:30 PM UK time. If you have any topics, please let Dave Rodgman know. :) Best regards, Don Harbin TrustedFirmware Community Manager don.harbin(a)linaro.org

2 years, 11 months

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[Mbed-tls-announce] Mbed TLS 3.2.1 release

by Paul Elliott via Mbed-tls-announce

Hi Mbed TLS users, We have released Mbed TLS version 3.2.1. This release is functionally identical to 3.2.0, but includes a file that was missing from the 3.2.0 release (see https://github.com/Mbed-TLS/mbedtls/issues/6084). Full details are available in the release notes (https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.2.1). We recommend all users to consider whether they are impacted, and to upgrade appropriately. Many thanks, Mbed TLS Team. IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. -- Mbed-tls-announce mailing list -- mbed-tls-announce(a)lists.trustedfirmware.org To unsubscribe send an email to mbed-tls-announce-leave(a)lists.trustedfirmware.org

2 years, 11 months

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Release of Mbed TLS 3.2.0 and 2.28.1

by Dave Rodgman

Hi Mbed TLS users, We have released Mbed TLS versions 3.2.0 and 2.28.1. These releases of Mbed TLS address several security issues, provide bug fixes, and for 3.2.0, add various features. Full details are available in the release notes (https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.2.0, https://github.com/Mbed-TLS/mbedtls/releases/tag/v2.28.1). We recommend all users to consider whether they are impacted, and to upgrade appropriately. Dave Rodgman

2 years, 11 months

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What is the URL to access the Mbed TLS knowledge base?

by Max Peng

Hi mbed-tls Team, I notice that https://tls.mbed.org has been directed to https://www.trustedfirmware.org/projects/mbed-tls/. However, I does not see any link to the old Mbed TLS knowledge base. It is a good resource for learning Mbed TLS. What is the URL to access it? Thanks, Max Peng

2 years, 11 months

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State of documentation

by Tim Becker

Hi all, it feels like the state of documentation has deteriorated since the last time I've used mbedtls (a couple of months ago). I'm not sure if the google index hasn't fully been updated yet, or I don't understand the new structure of the docs or ... Also, is this the proper forum to make suggestions? Should I raise an issue on Github? 1.) a lot of previously linked, useful information now redirects here: https://www.trustedfirmware.org/projects/mbed-tls/ which (please excuse my frankness) feels like an utterly useless abomination that only marketing people could love. - Some examples of previously useful links: from the wiki ( https://developer.trustedfirmware.org/w/mbed-tls/) : > Old Mbed TLS website > Documentation: Mbed TLS API Reference; Knowledge base; Dev corner all redirect to trustedfirmware.org ! As do nearly all the links in https://github.com/Mbed-TLS/mbedtls/blob/development/SUPPORT.md 2.) there is no longer an doxygen generated API documentation anywhere only. I could generate it myself, but then I'd need to get and install Doxygen, figure how to use it, etc. It would be great if this were restored. It can't be that expensive to host :) Anyway, it feels like I've been running around for hours trying to find _anything_ useful, but I just realized everything is redirected to trustedfirmware.org ... Is there any way to still access the old, useful docs? Thanks & sorry that this post is so negative, -tim

2 years, 11 months

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TLS Handshake failure while connecting to mqtt broker from device

by urvi＠milltech.in

Hello Sir/Madam, I am developing TI's EFM32 series micro controller based IOT device. This device will connect to mqtt broker and publish/ subscribes to/from data. In my application, I am trying to connect to AWS using mbedtls library over lwIP (no rtos mode). While my device is in debug mode (i.e. JTAG programmer connected) then it gets connected to AWS successfully. But when I remove JTAG programmer and operate device in normal running mode, then it failed to get connect to broker (i.e. AWS). I observe following errors occured while performing TLS handshaking stage: SSL - The connection indicated an EOF X509 - Certificate verification failed, e.g. CRL, CA or signatur SSL - Processing of the ServerHello handshake message failed

2 years, 11 months

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Setup to test and debug a single funciton.

by Victor Micó

Hi all, First of all apologies if this is not the right place for this topic. For my master thesis I am using the mbedtls library to analyze it using side channel analysis. My objective was to use it as a starting point to analyze the resistance of different exponentiation algorithms. With this objective I am trying to set up a environment where I can call the function "mbedtls_mpi_exp_mod" https://github.com/Mbed-TLS/mbedtls/blob/f5b7082f6e8af72868966b6ea99eae228f… and debug it. I have been trying for at least two weeks but I couldn't be able to succeed. I believe that when If I can get a debugging environment for that function I will be able to adapt it and use other exponentiation algorithms such as the Left-to-right k-ary (HAC 14.82). I am using VScode and the code is located in WLS Ubuntu 20.04. So far I been able to compile the full library and run all the tests. Anyone here could give mean indication on how to set up the environment to debug this function? Thanks! Victor.

2 years, 11 months

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Looking for information regarding the long-term support of the MbedTls library.

by heinrich.mueller＠g-ushin.com

Hello, Currently, we are evaluating the MbedLib to be eventually used in small and midsized automotive ECUs. * Since we have to follow the UNECE Regulation R155, R156, and ISO/SAE 21434 I need some information regarding the long-term support of the library and how the communication of bugs is organized? * I also do not understand the involvement and responsibility of ARM company? * Furthermore, I'm not sure if I understood the terms PSA and MbedTls and their mutual dependencies as well as the technical meaning? I checked the web for I but did not find anything about it yet. It would be just great if somebody can give me some hints or links to the information I am looking for. Regards Heico

2 years, 12 months

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