- mbed-tls - lists.trustedfirmware.org

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.

1 day, 19 hours

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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 week, 2 days

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Mbed TLS 3.6.5 Released

by Minos Galanakis

Hi Mbed TLS users, We have released Mbed TLS version 3.6.5. These releases of Mbed TLS address several security issues, provide bug fixes, and bring other minor changes. Full details are available in the release notes https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-3.6.5. We recommend all users to consider whether they are impacted, and to upgrade appropriately.

1 week, 2 days

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Modernizing a ecdh exchange

by Dirk-Willem van Gulik

I am currently doing an ECDH exchange over MQTT (i.e. at the message layer; MQTT is fundamentally `untrusted') - with a bit of out of band work to confirm end to end integrity. That worked nicely (and interoperable with java-bouncy-castle and openssl, etc with: mbedtls_ecp_group_load( &ctx_cli.grp, MBEDTLS_ECP_DP_CURVE25519 ) mbedtls_ecdh_gen_public( &ctx_cli.grp, &ctx_cli.d, &ctx_cli.Q, mbedtls_ctr_drbg_random, &ctr_drbg) mbedtls_mpi_write_binary( &ctx_cli.Q.X, node_publicsession, 32 ) to create the keys and with mbedtls_mpi_lset( &ctx_cli.private_Qp.Z, 1 )) mbedtls_mpi_read_binary( &ctx_cli.private_Qp.X, pubencr_tmp, CURVE259919_KEYLEN)) mbedtls_ecdh_compute_shared( &ctx_cli.grp, &ctx_cli.private_z, &ctx_cli.private_Qp, &ctx_cli.private_d, mbedtls_ctr_drbg_random, &ctr_drbg ) mbedtls_mpi_write_binary( &ctx_cli.private_z, sessionkey, CURVE259919_KEYLEN) to calculate the emphemeral session key. With the mbedtls_ecdh_context going increasingly private; I assume I can change the latter with: mbedtls_ecdh_calc_secret(&ctx_cli, &len_sessionkey, sessionkey, sizeof(sessionkey), mbedtls_ctr_drbg_random, &ctr_drbg) but am struggling to see how I an replace the key generation itself. Is there a similar option that does not look `into' ctx_cli ?? With kind regards, Dw. PS: actual code at https://github.com/MakerSpaceLeiden/AccesSystem/blob/master/lib-arduino/ACN…

3 weeks, 5 days

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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

1 month, 1 week

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DTLS handshake with and without hello verify request

by Ankita Hatmode

Hi Team, I am working on exploring DTLS handshake using the mbedtls-3.6.4 version on our embedded platform. I enabled the hello verify request feature and got stuck at hello verify request state on server side if I don't reset the ssl context and don't set the client transport ID. I want to know if there is any way to complete a handshake by bypassing the reset of ssl context and setting the client transport ID. Also, our environment only supports C89 constructs. I could not see inttypes.h in the mbedtls-3.6.4, is there any specific reason to remove this file? I am getting compilation errors without inttypes.h and stdint.h. Is there any macro to be enabled to support the c89 compilation in mbedtls stack? Looking forward to your response. Thanks and regards, Ankita Hatmode -- ------------------------------------------------------------------------------------------------------------------------- **Disclaimer:** This email message including any attachments is confidential, and may be privileged and proprietary to Agiliad. If you are not the intended recipient, please notify us immediately by replying to this message and destroy all copies of this message including any attachments. You are NOT authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. Thank you. ------------------------------------------------------------------------------------------------------------------------

1 month, 2 weeks

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TLS 1.3 and brainpool curves

by Maren Konrad

Dear MbedTLS maintainers, we are already using MBedTLS, however, we recently enabled TLS 1.3 and found that our certificates doesn't work anymore, because they are brainpoolP256r1 (https://datatracker.ietf.org/doc/html/rfc8734). So the question would be, if I missed any configuration to enable the usage of brainpool curves (which are working for TLS 1.2) or if there are any plans, that these are getting supported by MBedTLS 3.6.x? Best regards, Maren Konrad

1 month, 2 weeks

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TLS handshake error : unexpected eof

by kavitha bk

Hi We migrated from mbedtls 2.28 to mbedtls 3.6.2 https://github.com/Mbed-TLS/mbedtls/tree/107ea89daaefb9867ea9121002fbbdf926… and we see TLS handshake fails when we use TLS 1.2 in mbedtls 3.6.2 instead of 1.3. We get below error 20E094B0FFFF0000:error:0A000126:SSL routines:ssl3_read_n:unexpected eof while reading:/usr/src/debug/openssl/3.1.0-r0/ssl/record/rec_layer_s3.c:303: # openssl s_client -connect 192.168.142.1:7001 -no_tls1_3 fails After seeing the trace we have enabled ciphers but still we see the issue. please advise, thanks. Thanks Kavitha

1 month, 4 weeks

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psa crypto driver for imx-smw

by kavitha bk

Hi all, We are trying to write a psa crypto driver for imx-smw . They have exposed psa certified public apis https://github.com/nxp-imx/imx-smw/tree/release/version_4.x/public/psa Is there any documentation to replace existing psa implementation to custom psa crypto implementation in mbedtls..Please advise on the approach to follow to call the custom apis to implement based on https://github.com/Mbed-TLS/mbedtls/blob/mbedtls-3.6/docs/psa-driver-exampl… Thanks Kavitha

2 months, 2 weeks

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Mbed TLS 3.6.4 Released

by Minos Galanakis

Hi Mbed TLS users, We have released Mbed TLS versions 3.6.4. These releases of Mbed TLS address several security issues, provide bug fixes, and bring other minor changes. Full details are available in the release notes (https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-3.6.4). We recommend all users to consider whether they are impacted, and to upgrade appropriately.

2 months, 3 weeks

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Credential validation BEFORE first TLS handshake: the present and future of mbedtls_pk_sign/verify()

by Almut Herzog

Hi, Prior to the first TLS handshake our application is required to perform input validation of the provided credentials (from file or smart card) for this peer. One of those checks is to verify that private and public key match. We used to use mbedtls_pk_sign() with a custom mbedtls_pk_context for that. But in version 3.X mbedtls_pk_info_t was made private so mbedtls_pk_setup() with a custom mbedtls_pk_info_t whose sign_func would call into our smart card wrapper is no longer possible. Is there still a way to provide custom callback functions for signing in 3.6.4 somehow? Or any other workaround for early check of a key pair? Looking at 4.0.0-beta, also pk.h is no longer public. Will it still be possible to perform early validation of this peer's credentials prior to a first TLS handshake? How? While I am at it, it would be good to implement something that is future-proof. What else I have looked at: * mbedtls_pk_setup_opaque() might be the way to go but I do not find an example of how to link a key id to a custom signature function. * mbedtls_pk_setup_rsa_alt() would be useful if our application was always using RSA. * Both functions are no longer public in 4.0 Related: Early validation of a CRL (whether it was signed by the expected CA) used to be possible with mbedtls_pk_verify_ext(). But to properly set the input parameters requires access to private members of mbedtls_x509_crl in 3.6.4 (maybe an acceptable move?) but in 4.0.0 mbedtls_pk_verify_ext() is no longer public. How perform explicit/"manual" CRL validation especially given the possibly skipped CRL validation in mbedtls_x509_crt_verify() as per the comment below? "It is your responsibility to provide up-to-date CRLs for all trusted CAs. If no CRL is provided for the CA that was used t sign the certificate, CRL verification is skipped silently..." Any future-proof ideas for this? Best regards, /Almut

2 months, 3 weeks

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Re: MBed-TLS Technical Forum - Asia

by Gilles Peskine

Hello, Due to holidays, Arm will be unable to host a meeting on 14 July 2025. Slides are available at https://github.com/TrustedFirmwareWebsite/website/pull/652/files#diff-ee947… and will be on the archive web site shortly. Short summary of the past 2 weeks: the 3.6.4 release is out. We are now focusing on the last tasks for the 1.0/4.0 big release at end of Q3. Best regards, -- Gilles Peskine Mbed TLS developer and PSA Crypto architect ________________________________ From: Trusted Firmware Public Meetings Sent: 21 May 2025 14:56 To: Trusted Firmware Public Meetings <linaro.org_havjv2figrh5egaiurb229pd8c(a)group.calendar.google.com>; mbed-tls(a)lists.trustedfirmware.org <mbed-tls(a)lists.trustedfirmware.org>; psa-crypto(a)lists.trustedfirmware.org <psa-crypto(a)lists.trustedfirmware.org> Subject: MBed-TLS Technical Forum - Asia When: 14 July 2025 11:00-11:50. Where: Trusted Firmware is inviting you to a scheduled Zoom meeting. Topic: MBed-TLS Technical Forum - Asia Time: Jun 16, 2025 10:00 AM London Every 4 weeks on Mon, 39 occurrence(s) Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://linaro-org.zoom.us/meeting/tJMqcuGuqDotGtIbACm498ytl0ZhydWKdu1b/ics…<https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fmeeting%2Ft…> Join Zoom Meeting https://linaro-org.zoom.us/j/97758661706?pwd=baMjUvnWbY20z3ignQca7QVahhozkI…<https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9775866…> Meeting ID: 977 5866 1706 Passcode: 577208 --- One tap mobile +16892781000,,97758661706# US +17193594580,,97758661706# US --- Dial by your location • +1 689 278 1000 US • +1 719 359 4580 US • +1 253 205 0468 US • +1 253 215 8782 US (Tacoma) • +1 301 715 8592 US (Washington DC) • +1 305 224 1968 US • +1 309 205 3325 US • +1 312 626 6799 US (Chicago) • +1 346 248 7799 US (Houston) • +1 360 209 5623 US • +1 386 347 5053 US • +1 507 473 4847 US • +1 564 217 2000 US • +1 646 558 8656 US (New York) • +1 646 931 3860 US • +1 669 444 9171 US • +1 669 900 9128 US (San Jose) • 833 548 0282 US Toll-free • 833 928 4608 US Toll-free • 833 928 4609 US Toll-free • 833 928 4610 US Toll-free • 877 853 5247 US Toll-free • 888 788 0099 US Toll-free • 833 548 0276 US Toll-free Meeting ID: 977 5866 1706 Find your local number: https://linaro-org.zoom.us/u/acdtApJNbc<https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fu%2FacdtApJ…> When Every 4 weeks from 10am to 10:50am on Monday (United Kingdom Time) Guests mbed-tls(a)lists.trustedfirmware.org<mailto:mbed-tls@lists.trustedfirmware.org> psa-crypto(a)lists.trustedfirmware.org<mailto:psa-crypto@lists.trustedfirmware.org> View all guest info<https://calendar.google.com/calendar/event?action=VIEW&eid=NjI4c3NnYjFoZHRh…> RSVP for psa-crypto(a)lists.trustedfirmware.org<mailto:psa-crypto@lists.trustedfirmware.org> for all events in this series Yes<https://calendar.google.com/calendar/event?action=RESPOND&eid=NjI4c3NnYjFoZ…> No<https://calendar.google.com/calendar/event?action=RESPOND&eid=NjI4c3NnYjFoZ…> Maybe<https://calendar.google.com/calendar/event?action=RESPOND&eid=NjI4c3NnYjFoZ…> More options<https://calendar.google.com/calendar/event?action=VIEW&eid=NjI4c3NnYjFoZHRh…> Invitation from Google Calendar<https://calendar.google.com/calendar/> You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more<https://support.google.com/calendar/answer/37135#forwarding>

3 months, 2 weeks

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Strategic Financing & Brokerage Collaboration Opportunity

by LIAM GILL

We are pleased to introduce Velositi Consultancy Group, a Finnish-owned brokerage and consultancy firm headquartered in Ontario, Canada. As the exclusive representative of leading financial institutions across Oman, Saudi Arabia, and Dubai, we offer customized financing solutions globally. Through our partners, we provide loan facilities at a competitive 3% annual interest, featuring a 2-year grace period and no physical collateral—a unique offer tailored for today’s business environment. This opportunity is extended especially to recognized business leaders like yourself. Your recent listing by your country’s Chamber of Commerce as “Reliable to do business with” during the Saudi Business Summit highlights the potential for meaningful collaboration. Beyond direct financing, we also welcome broker partnerships for referring businesses in need of funding. We would be pleased to discuss how we can support your growth and financial objectives. Warm regards, Liam Gill Chairman, Business Development Velositi Consultancy Group 300 John Street, Suite 506, Thornhill, ON L3T 6M8, Canada LIAM GILL 300 John Street, Suite 506 , ON , Thornhill , L3T 6M8 Unsubscribe ( https://u45460243.ct.sendgrid.net/wf/unsubscribe?upn=u001.AzuRT3u7SiTsBx5mQ… ) - Unsubscribe Preferences ( https://u45460243.ct.sendgrid.net/wf/unsubscribe?upn=u001.AzuRT3u7SiTsBx5mQ… )

3 months, 2 weeks

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Mbed TLS 4.0.0-beta & TF-PSA-Crypto 1.0.0-beta releases.

by Minos Galanakis

I am happy to announce the joint-release of Mbed TLS 4.0.0-beta & TF-PSA-Crypto 1.0.0-beta PSA-Crypto now lives in its own repository while TLS and X.509 remain in Mbed TLS. This beta release breaks compatibility with earlier versions of Mbed TLS. Please do not use it in production. It’s intended for the community to verify codebase integrations against the split and API changes, and for early adopters to experiment and provide feedback. For full details, please see the release pages: Mbed TLS 4.0.0-beta: https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-4.0.0-beta TF-PSA-Crypto 1.0.0-beta: https://github.com/Mbed-TLS/TF-PSA-Crypto/releases/tag/tf-psa-crypto-1.0.0-…

3 months, 3 weeks

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[Mbed-tls-announce] Mbed TLS 4.0.0-beta & TF-PSA-Crypto 1.0.0-beta

by Minos Galanakis via Mbed-tls-announce

I am happy to announce the joint-release of Mbed TLS 4.0.0-beta & TF-PSA-Crypto 1.0.0-beta PSA-Crypto now lives in its own repository while TLS and X.509 remain in Mbed TLS. This beta release breaks compatibility with earlier versions of Mbed TLS. Please do not use it in production. It’s intended for the community to verify codebase integrations against the split and API changes, and for early adopters to experiment and provide feedback. For full details, please see the release pages: Mbed TLS 4.0.0-beta: https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-4.0.0-beta TF-PSA-Crypto 1.0.0-beta: https://github.com/Mbed-TLS/TF-PSA-Crypto/releases/tag/tf-psa-crypto-1.0.0-… 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

3 months, 3 weeks

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[Mbed-tls-announce] Mbed TLS 3.6.4 Released

by Minos Galanakis via Mbed-tls-announce

Hi Mbed TLS users, We have released Mbed TLS versions 3.6.4. These releases of Mbed TLS address several security issues, provide bug fixes, and bring other minor changes. Full details are available in the release notes (https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-3.6.4). We recommend all users to consider whether they are impacted, and to upgrade appropriately. 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

3 months, 3 weeks

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imx-secure-enclave with mbedtls 2.28.9

by kavitha bk

Hi We are using mbedtls 2.28.9 and want to offload crypto operations to HSM from NXP imx-secure-enclave. is the below approach correct or please suggest alternate approaches if any? 1.Transition all apis from traditional apis to psa in modules Use PSA crypto module https://github.com/Mbed-TLS/mbedtls/blob/development/docs/psa-transition.md 2. Integrate PSA module with imx-secure-enclave in our custom mbedtls 3. All modules will use custom mbedtls which will internally offload crypto operations to HSM or Do you recommend to use MBEDTLS_PK_RSA_ALT_SUPPORT? and implement the key creation/signing/export of public key operations ? Thanks, Kavitha

4 months, 2 weeks

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Mbed TLS information request

by Solis, Hector

Hi! We are working with Mbed TLS 3.6.0 library and need the following information: 1. Is there any End-Of-Life date planned for this library? 2. What is the current version? 3. How can we obtain support for the library enquiries? Does this support has a cost? 4. How is the library update? Does this update has a cost? 5. Are this library Open Source? Thanks in advance for your help! 🙂 Have a great day! Héctor J. Solís Castillo Embedded Engr I Honeywell | HTS Building Automation 990, Av. Eje 5 Norte, Mexico City CDMX hectorjose.solis(a)honeywell.com<mailto:hectorjose.solis@honeywell.com> honeywell.com<http://www.honeywell.com/> Pronouns: He/Him<https://www.mypronouns.org/what-and-why>

4 months, 2 weeks

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Question about partial certificate chains

by Roman Janota

Hello, I have the following two certificate chains: server <- intermediateCA <- rootCA and client <- intermediateCA <- rootCA. Currently there are two ways the client is authenticated by the server: both the intermediateCA and rootCA certificates are configured as CAs on the server or if only intermediateCA is configured. I am using a custom verify callback set by mbedtls_ssl_conf_verify(). I would like to achieve two separate cases: 1) Make the MbedTLS' built-in pre-verify be successful, even when only the rootCA certificate is set as the server's CA. 2) Always obtain the whole certificate chain up to the root in the verify callback. For case 1) this is how our OpenSSL TLS implementation works, it is discussed here <https://github.com/openssl/openssl/issues/7871>. From my understanding the server should be able to build the certificate chain by inquiring the client about its certificate's issuer, etc. For case 2), whenever both rootCA and intermediateCA are configured on the server, only the chain client <- intermediateCA is received by the callback. I would like to be able to receive the chain client <- intermediateCA <- rootCA. Are these two cases achievable with mbedTLS? For reference I am using mbedTLS 3.5.2. For my server I would like to utilize both cases 1) and 2) and for the client only the case 1). Kind regards, Roman Janota

4 months, 3 weeks

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PSA Crypto API version compliance

by Zak, Kevin

Hello, I notice in 'crypto.h' of mbedTLS 3.6.3, PSA_CRYPTO_API_VERSION_MAJOR & PSA_CRYPTO_API_VERSION_MINOR show the version implemented as v1.0. Per the github page of TF-PSA-Crypto (https://github.com/Mbed-TLS/TF-PSA-Crypto/blob/development/README.md), the implementation is of v1.1. I verified that this mismatch between the README and crypto.h exists on the development branch of TF-PSA-Crypto as well. What is the correct version implemented, as of mbedTLS 3.6.3? Regards, Kevin

4 months, 4 weeks

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(no subject)

by Steve Glass

Hi, I'm trying to build the mbedtls v3.6.3 for an embedded 386 device. The build is configured as `crypto_baremetal`. In the snippet below I use the make build process with a GCC 11.2 cross toolchain that's installed in `/opt/x-tools/i386-elf but the build process ends with an error: ``` (venv) dev [ /workspaces/mbedtls ]$ make CC=/opt/x-tools/i386-elf/bin/i386-elf-gcc AR=/opt/x-tools/i386-elf/bin/i386-elf-ar make[1]: Entering directory '/workspaces/mbedtls/library' CC aes.c CC aesni.c CC aesce.c ... CC src/certs.c CC src/psa_test_wrappers.c CC src/test_helpers/ssl_helpers.c make[1]: Leaving directory '/workspaces/mbedtls/tests' make[1]: Entering directory '/workspaces/mbedtls/programs' CC aes/crypt_and_hash.c /opt/x-tools/i386-elf/lib/gcc/i386-elf/11.2.0/../../../../i386-elf/bin/ld: cannot find crt0.o: No such file or directory collect2: error: ld returned 1 exit status make[1]: *** [Makefile:160: aes/crypt_and_hash] Error 1 make[1]: Leaving directory '/workspaces/mbedtls/programs' make: *** [Makefile:34: programs] Error 2 (venv) dev [ /workspaces/mbedtls ]$ ``` So I have two questions: This error says it fails to link find crt0.o but the output (library/libmbedcrypto.a) exists and looks ok (altho I've yet to try linking against it). Is the error message spurious or is the library it produced unusable? Do I really need a version of crt0.o to link successfully? (The same configuration builds with no errors using the host's x64 compiler toolchain - and that toolchain also doesn't have a crt0.o file). Thanks in advance!

5 months

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Any plan for a Java Binding ?

by Simon Bernard

Hi, I'm the main developer of Leshan Library. This is a Java open source implementation of LWM2M protocol hosted at Eclipse Foundation. We currently use Scandium (from Californium Project) as DTLS library. This library fits our needs until now but we have some concerns about future-proofness of it (Especially, there is no plan for DTLS 1.3) and there is no support of TLS. So we explore some other way for the future. I had consider to use OpenJdk but there is a lot of missing IoT Features. I contact OpenJdk security dev and they makes me understand politely that IoT is not the priority (at least this is my understanding) Another solution we explore would be to use an mbedtls Java binding. (as mbedtls is well supported and focus IoT) There is a not official one at : https://github.com/open-coap/kotlin-mbedtls *Questions : * 1. Is there any official java binding ? 2. If no, is there any plan for that kind of binding ? 3. If no, if there is a community initiative could it be hosted by you ? Thx, Simon

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