- mbed-tls - lists.trustedfirmware.org

Question about using hardware-backed parameters in ALT crypto implementations

by Massimiliano Cialdi

Hi, I’m working with Mbed TLS 2.28.x on a microcontroller that provides a built-in crypto engine. The existing *_ALT support works fine for performance, and higher-level modules correctly route their block operations through the accelerated backend. On this platform the crypto hardware can also use internal key material stored in dedicated slots. These values are not accessible as byte arrays and cannot be passed to the usual setkey_*() API. Question Is there a recommended way to configure an ALT implementation so that it can select an internal key slot instead of receiving a buffer? Or, more generally, how should an ALT backend represent a key that is not exposed to software? Any guidance on the intended design would be appreciated. Thanks! Massimiliano Cialdi FIRMWARE ENGINEERING PROFESSIONAL LEADER Powersoft S.p.A. Via E. Conti, 5 - Scandicci (Fi) 50018 - Italy OFFICE: +39 055 7350230 [cid:2_3b23bc2c-3db3-4330-b6f5-3fb62b89422a.png]<https://www.facebook.com/powersoft/>[cid:3_7da2eb67-7c7f-41e6-9598-128bdd52ec04.png]<https://www.instagram.com/powersoft.official/>[cid:4_a5d469e7-3228-4fb1-948d-4c3e879ea0da.png]<https://www.youtube.com/@powersoftaudio>[cid:5_e4390674-51fd-4219-9389-28ae9a12796d.png]<https://www.linkedin.com/company/powersoft>[cid:6_083a55f9-076c-4d52-9f93-69225b28cb32.png]<https://open.spotify.com/show/6lwXROYcCyrVnJi6J9fA42>[cid:7_7fd8585e-63fd-441a-95f3-6c0b23d059e1.png]<https://x.com/Powersoft_Japan>[cid:8_6308aaa9-b97d-405b-a86c-0300a381d13f.png]<https://space.bilibili.com/3546387314641333>[cid:9_9af1e42f-0019-42c4-8046-d6246e65ed9e.png]<https://teams.microsoft.com/l/chat/0/0?users=massimiliano.cialdi@powersoft.…> [cid:pwsrgbn_12214209-f50f-45fa-be18-2a4cf1a5818a.png]<https://www.powersoft.com/en>

11 months

2
1
0 0

Re: How can I read plain-text private key into rsa_context?

by Shannek Pierce

05 DC AD 24 F4 E4 B1 C4 39 15 62 45 02 DC 7B 4A C6 57 8F FC 40 5B 5E 6F 55 FB E1 F6 58 62 CB 57 05 Sent from my iPhone

11 months, 1 week

1
0
0 0

AI Policy - Guidance on AI-assisted contributions

by Shaun Longhorn

All, Please be aware that today we have published our AI policy with Guidance on AI-assisted contributions. See the full details here: https://www.trustedfirmware.org/aipolicy/ Should you have any questions feel free to raise them. Thanks, Shaun Community Manager

11 months, 1 week

1
0
0 0

Re: [Hafnium] Re: Gerrit scheduled maintenance: 8th November 8-12 UTC

by Saheer Babu

Hi Jerome Could you try again please? Thanks, Saheer From: Jerome Forissier <jerome.forissier(a)linaro.org> Date: Monday, 10 November 2025 at 10:19 To: Saheer Babu <Saheer.Babu(a)arm.com>, tf-m(a)lists.trustedfirmware.org <tf-m(a)lists.trustedfirmware.org>, tf-rmm(a)lists.trustedfirmware.org <tf-rmm(a)lists.trustedfirmware.org>, hafnium(a)lists.trustedfirmware.org <hafnium(a)lists.trustedfirmware.org>, mbed-tls(a)lists.trustedfirmware.org <mbed-tls(a)lists.trustedfirmware.org>, olivier.deprez--- via Tf-openci <tf-openci(a)lists.trustedfirmware.org> Subject: Re: [Hafnium] Re: Gerrit scheduled maintenance: 8th November 8-12 UTC Hi Saheer, On 11/9/25 00:19, Saheer Babu via Hafnium wrote: > Hi > > Just wanted to let you all know that maintenance was done in the morning and site is back to normal. I'm getting a 403 from here: $ curl --show-headers https://review.trustedfirmware.org/ HTTP/2 403 server: awselb/2.0 date: Mon, 10 Nov 2025 10:14:55 GMT content-type: text/html content-length: 118 <html> <head><title>403 Forbidden</title></head> <body> <center><h1>403 Forbidden</h1></center> </body> </html> Same for git.trustedfirmware.org which makes the OP-TEE CI fail: https://github.com/OP-TEE/optee_os/actions/runs/19226835413/job/54955917815… Regards, -- Jerome > > Thanks, > Saheer > > From: Saheer Babu <Saheer.Babu(a)arm.com> > Date: Thursday, 30 October 2025 at 16:13 > To: tf-m(a)lists.trustedfirmware.org <tf-m(a)lists.trustedfirmware.org>, tf-rmm(a)lists.trustedfirmware.org <tf-rmm(a)lists.trustedfirmware.org>, hafnium(a)lists.trustedfirmware.org <hafnium(a)lists.trustedfirmware.org>, mbed-tls(a)lists.trustedfirmware.org <mbed-tls(a)lists.trustedfirmware.org>, olivier.deprez--- via Tf-openci <tf-openci(a)lists.trustedfirmware.org> > Subject: Gerrit scheduled maintenance: 8th November 8-12 UTC > Hi All, > > We will be performing maintenance activity on review.trustedfirmware.org and service will be unavailable on 8th November between 8 AM-11 AM UTC. > > Best regards, > > Saheer >

11 months, 1 week

1
0
0 0

FW: CI infrastructure scheduled maintenance: 12th Sep 2025

by Joanna Farley

FYI From: Saheer Babu via Tf-openci <tf-openci(a)lists.trustedfirmware.org> Date: Wednesday, 10 September 2025 at 15:17 To: tf-openci(a)lists.trustedfirmware.org <tf-openci(a)lists.trustedfirmware.org> Subject: [Tf-openci] CI infrastructure scheduled maintenance: 12th Sep 2025 Hi all, We will be performing upgrade of the clusters hosting review.trustedfirmware.org and ci.trustedfirmware.org on Friday, 12th Sep 2025 at 16:00 GMT+1. During this maintenance window, both services will be unavailable for approximately 4 hours. A follow-up email will be sent once the services are fully restored. Best regards, Saheer 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. -- Tf-openci mailing list -- tf-openci(a)lists.trustedfirmware.org To unsubscribe send an email to tf-openci-leave(a)lists.trustedfirmware.org

11 months, 2 weeks

2
3
0 0

Security backports for v2.28

by Matt Bauman

Hello all, I know that v2.28.10 is EOL, but I've been working on bringing security bug fixes to our distribution of it as part of my work in shoring up the Julia package ecosystem. I've largely leaned on the Debian security team's work thus far; they have the much harder task of supporting 2.16.9 for bullseye (security) and have done great work in bringing that version up to date through CVE-2025-52497. I've re-landed their backport patches against v2.28.10; these can be found on our build tree [1] or my fork [2]: 1. https://github.com/JuliaPackaging/Yggdrasil/tree/54c5a3e8e72899a3a778d8617f… 2. https://github.com/Mbed-TLS/mbedtls/compare/v2.28.10...mbauman:mbedtls:v2.2… Now I'm faced with the daunting prospect of last week's CVE-2025-54764 and CVE-2025-59438. These are *much* larger changesets. Has anyone else begun tackling this? I very much appreciated the guidance that’s included in the advisory itself, but I'm guessing there may be others in our situation... and I came here looking to see if anyone had begun talking about this (or working on it) yet. Best, Matt

11 months, 2 weeks

2
2
0 0

Question regarding mbedtls 3.6.0 conformance to IEC 62351-3:2023

by Tommaso Mancini

Hello, I am writing to you to ask if you have any available documentation you can share regarding mbedtls's conformance to IEC 62351-3:2023. For example: Do you know of any users which have implemented the library in systems that reached IEC 62351-3:2023 certification? Do you have a list of features mapped to the IEC 62351-3:2023 standard requirements? Perhaps a PICS template? Thank you in advance and apologies if this is the wrong channel for this kind of question. Kind Regards, Tommaso Mancini [1741361442716] <mailto:tommaso.mancini@sel-electric.it> Tommaso Mancini SEL S.p.A. R&D Software and Test Engineer Via Amendola 9,11,13,15,17 51035 Lamporecchio (PT) Tel. +39 0573 80051 Fax +39 0573 803110 website: www.sel-electric.com<http://www.sel-electric.com/> e-mail: tommaso.mancini(a)sel-electric.it<mailto:tommaso.mancini@sel-electric.it> <mailto:tommaso.mancini@sel-electric.it>Questo è un messaggio di posta elettronica proveniente da SEL s.p.a. Le informazioni contenut in questa comunicazione sono altamente riservate e possono essere utilizzate solo dalla persona o dall’ente cui sono destinate. La diffusione, distribuzione e/o copiatura del documento trasmesso da parte di qualsiasi soggetto diverso dal destinatario è proibita. Se avete ricevuto questo messaggio per errore, Vi preghiamo di contattarci immediatamente. Grazie. This communication is intended only for use by the addressee. It may contain confidential or privileged information. Transmission cannot be guaranteed to be secure or error-free. If you receive this communication unintentionally, please inform us immediately. Thank you. Per favore, pensa all’ambiente prima di stampare. Please, consider the environment before you print.

11 months, 3 weeks

1
0
0 0

MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED

by Кристиян Ценов

11 months, 3 weeks

1
0
0 0

Re: TrustedFirmware.org - Check for MbedTLS License/Royality fee for commercial usage

by Carina Tsai

To whom it may concern, Our engineering team is using the Mbed TLS library in our wifi range extenders sold on markets and adhere to the licensing terms outlined in the sourcecode and docs. Thanks to Shaun’s guideline, it would be no royalty if we adhere to the licensing terms. Is there any other cost required for us to use the Mbed TLS library in our wifi range extenders, adhering to the licensing terms outlined in the sourcecode and docs? Thank you Carina From: Shaun Longhorn <shaun.longhorn(a)linaro.org<mailto:shaun.longhorn@linaro.org>> Sent: Tuesday, September 30, 2025 7:08 PM To: Ken Chen <Ken.Chen(a)netgear.com<mailto:Ken.Chen@netgear.com>> Cc: enquiries(a)trustedfirmware.org<mailto:enquiries@trustedfirmware.org> Subject: Re: TrustedFirmware.org - Check for MbedTLS License/Royality fee for commercial usage External Email. Be cautious clicking attachments and links. Report suspicious to reportphishing(a)netgear.com<mailto:reportphishing@netgear.com>. Hi Ken, I'm the Community Manager at Trusted Firmware. I can't advise you directly on your licensing situation but I can point you towards the documentation. Mbed TLS is an open source community project and no royalty is required. You must adhere to the licensing terms outlined in the sourcecode and docs: https://github.com/Mbed-TLS/mbedtls?tab=readme-ov-file#license<https://urldefense.com/v3/__https:/github.com/Mbed-TLS/mbedtls?tab=readme-o…> https://mbed-tls.readthedocs.io/en/latest/kb/licensing/<https://urldefense.com/v3/__https:/mbed-tls.readthedocs.io/en/latest/kb/lic…> You can also reach out to the Mbed-TLS community on the following public mailing list. https://lists.trustedfirmware.org/mailman3/lists/mbed-tls.lists.trustedfirm…<https://urldefense.com/v3/__https:/lists.trustedfirmware.org/mailman3/lists…> I should highlight our optional memberships for Trusted Firmware detailed on this page. https://www.trustedfirmware.org/join/<https://urldefense.com/v3/__https:/www.trustedfirmware.org/join/__;!!JNtdCR…> membership has a number of benefits detailed in the slides. It could be beneficial in terms of lab testing and project visibility. If you have an interest we can arrange a call with the Co-Chairs and discuss benefits in more detail. Thanks, Shaun Community Manager On Tue, 30 Sept 2025 at 09:20, 'Ken Chen' via TFenquiries <enquiries(a)trustedfirmware.org<mailto:enquiries@trustedfirmware.org>> wrote: Dear Sir/Madam, I am reaching out to inquire about the licensing terms and any potential royalty fees associated with using the Mbed TLS library in our commercial products. I was unable to find a specific contact point for this type of query. Could you kindly forward this message to the appropriate person or team for further discussion? Thank you for your assistance. Best regards Ken This e-mail, including attachments, may include confidential and/or proprietary information, and may be used only by the person or entity to which it is addressed. If the reader of this e-mail is not the intended recipient or his or her authorized agent, the reader is hereby notified that any dissemination, distribution or copying of this e-mail is prohibited. If you have received this e-mail in error, please notify the sender by replying to this message and delete this e-mail immediately. This e-mail, including attachments, may include confidential and/or proprietary information, and may be used only by the person or entity to which it is addressed. If the reader of this e-mail is not the intended recipient or his or her authorized agent, the reader is hereby notified that any dissemination, distribution or copying of this e-mail is prohibited. If you have received this e-mail in error, please notify the sender by replying to this message and delete this e-mail immediately.

12 months

5
13
0 0

Announcing the joint release of Mbed TLS 4.0.0 & TF-PSA-Crypto 1.0.0

by Minos Galanakis

Hi Mbed TLS users, We’re pleased to announce a major milestone: the joint release of Mbed TLS 4.0.0 and the first-ever TF-PSA-Crypto 1.0.0. Mbed TLS now uses PSA Crypto as the default cryptographic API, and these releases include significant API changes that break backward compatibility with previous versions These releases include significant API changes that break backward compatibility with previous versions, so please test your integration thoroughly and follow the migration guides to update your codebase: https://github.com/Mbed-TLS/mbedtls/blob/mbedtls-4.0.0/docs/4.0-migration-g… https://github.com/Mbed-TLS/TF-PSA-Crypto/blob/v1.0.0/docs/1.0-migration-gu… Full details are available in the release notes: https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-4.0.0 https://github.com/Mbed-TLS/TF-PSA-Crypto/releases/tag/tf-psa-crypto-1.0.0.

1 year

1
0
0 0

2026

2025

2024

2023

2022

2021

2020

mbed-tls