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mbedTLS 3.6.6 TLS 1.3: Heap corruption issue

by Sielatchom, Cesaire

Hello, while setting up a TLS 1.3 client based on mbedTLS 3.6.6, I am facing a memory corruption issue and would appreciate any advice on how to debug it further. Initial symptoms ================ Originally I was using FreeRTOS heap_4 as the allocator. During the TLS handshake I eventually hit one of the following assertions inside the FreeRTOS heap implementation: configASSERT( heapBLOCK_IS_ALLOCATED( pxLink ) != 0 ); configASSERT( pxLink->pxNextFreeBlock == heapPROTECT_BLOCK_POINTER( NULL ) ); This suggested corruption of the heap block header structures. Isolation attempt ================= To exclude interactions with the FreeRTOS heap allocator, I reconfigured mbedTLS to use a dedicated static memory pool by enabling: MBEDTLS_MEMORY_BUFFER_ALLOC_C I allocated a dedicated 1 MB memory pool located in external RAM and initialized it via: mbedtls_memory_buffer_alloc_init(...); No other software component is intended to access this memory area. New failure =========== With the dedicated memory pool in place, the TLS 1.3 handshake now fails inside memory_buffer_alloc.c with the following consistency check: if (cur->alloc != 0) { #if defined(MBEDTLS_MEMORY_DEBUG) mbedtls_fprintf(stderr, "FATAL: block in free_list but allocated data\n"); #endif mbedtls_exit(1); } The execution stops with: FATAL: block in free_list but allocated data This appears to indicate that a block found in the free list still has its allocation flag set. What I have checked so far ========================== - Initially I suspected FreeRTOS heap corruption. - I added hardware watchpoints at the beginning and end of the affected memory blocks. - No obvious buffer overflow was detected using those watchpoints. - Secure and Non-Secure heaps are separated. - I experimented with MPU guard regions. - The issue is reproducible under TLS/WebSocket traffic. - mbedTLS is now running from a dedicated static memory pool. - The dedicated mbedTLS pool is approximately 1 MB and is not shared with the FreeRTOS heap. Platform ======== - STM32U585 - TrustZone enabled - FreeRTOS - mbedTLS 3.6.6 - TLS 1.3 enabled - WebSocket over TLS Are there recommended debugging options or allocator diagnostics that could help identify the offending allocation or the block whose metadata became inconsistent? Has anyone experienced similar issues specifically with TLS 1.3 handshakes, especially during key share generation? Relevant handshake log ====================== init connect[1] . Performing the SSL/TLS handshake...[TLS][2] ../SRV_TLS/mbedtls/library/ssl_tls.c:4670: => handshake [TLS][2] ../SRV_TLS/mbedtls/library/ssl_msg.c:2356: => flush output [TLS][2] ../SRV_TLS/mbedtls/library/ssl_msg.c:2365: <= flush output [TLS][2] ../SRV_TLS/mbedtls/library/ssl_tls.c:4589: client state: MBEDTLS_SSL_HELLO_REQUEST [TLS][3] ../SRV_TLS/mbedtls/library/ssl_misc.h:1353: handshake state: 0 (MBEDTLS_SSL_HELLO_REQUEST) -> 1 (MBEDTLS_SSL_CLIENT_HELLO) [TLS][2] ../SRV_TLS/mbedtls/library/ssl_msg.c:2356: => flush output [TLS][2] ../SRV_TLS/mbedtls/library/ssl_msg.c:2365: <= flush output [TLS][2] ../SRV_TLS/mbedtls/library/ssl_tls.c:4589: client state: MBEDTLS_SSL_CLIENT_HELLO [TLS][2] ../SRV_TLS/mbedtls/library/ssl_client.c:921: => write client hello [TLS][3] ../SRV_TLS/mbedtls/library/ssl_client.c:487: dumping 'client hello, random bytes' (32 bytes) [TLS][3] ../SRV_TLS/mbedtls/library/ssl_client.c:487: 0000: 9a 99 37 69 fa 5e 07 f7 ff c8 5b ac 56 fe 45 1a ..7i.^....[.V.E. [TLS][3] ../SRV_TLS/mbedtls/library/ssl_client.c:487: 0010: 53 d1 a1 d6 27 f6 5d 5a 4e 5b 2a 80 4c 1e 9b cb S...'.]ZN[*.L... [TLS][3] ../SRV_TLS/mbedtls/library/ssl_client.c:512: dumping 'session id' (0 bytes) [TLS][3] ../SRV_TLS/mbedtls/library/ssl_client.c:370: client hello, add ciphersuite: 1301, TLS1-3-AES-128-GCM-SHA256 [TLS][3] ../SRV_TLS/mbedtls/library/ssl_client.c:388: adding EMPTY_RENEGOTIATION_INFO_SCSV [TLS][3] ../SRV_TLS/mbedtls/library/ssl_client.c:397: client hello, got zu cipher suites [TLS][3] ../SRV_TLS/mbedtls/library/ssl_tls13_client.c:57: client hello, adding supported versions extension [TLS][3] ../SRV_TLS/mbedtls/library/ssl_tls13_client.c:80: supported version: [3:4] [TLS][3] ../SRV_TLS/mbedtls/library/ssl_tls13_client.c:86: supported version: [3:3] [TLS][3] ../SRV_TLS/mbedtls/library/ssl_tls13_client.c:573: no cookie to send; skip extension [TLS][3] ../SRV_TLS/mbedtls/library/ssl_tls13_client.c:285: client hello: adding key share extension [TLS][1] ../SRV_TLS/mbedtls/library/ssl_tls13_generic.c:1552: Perform PSA-based ECDH/FFDH computation. FATAL: block in free_list but allocated data Any suggestions, debugging techniques, or similar experiences would be greatly appreciated. Thank you very much. Best regards, Cesaire Mit freundlichen Grüßen / Best regards i. A. Cesaire Sielatchom Konstrukteur und Entwickler [BKS_4c.gif] BKS GmbH Entwicklung Elektronik Heidestr. 71 D-42549 Velbert Telefon +49 2051 201 528<tel:+49%202051%20201%20528> Cesaire.Sielatchom(a)bks.de<mailto:Cesaire.Sielatchom@bks.de> www.bks.de<https://www.bks.de/de-de> BKS GmbH Sitz der Gesellschaft: Velbert Amtsgericht Wuppertal, HRB 17711 GF: Thomas Polonyi Vorsitzender des Aufsichtsrats: Dirk Leuker WEEE-Reg.-Nr. DE 14737171 [Email_Footer SicherheitsExpo 2026.jpg] Diese Mail ist vertraulich. Wenn Sie nicht der beabsichtigte Empfänger sind, dürfen Sie die Informationen nicht offenlegen, benutzen, kopieren oder verteilen. Wenn Sie diese Mail durch einen Fehler bekommen haben, teilen Sie uns dies bitte dadurch mit, dass Sie diese Mail an den Absender zurückschicken. Bitte löschen Sie danach diese Mail und alle Anhänge. Danke. This e-mail message including any attachment is intended for the sole use of the individual or entity named above. If you are not the intended recipient, please do not read, copy, use or disclose this communication to others; also please notify the sender by replying to this message and then delete it and all attachments from your system.Thank you.

15 hours, 35 minutes

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Updated invitation with note: MBed-TLS Technical Forum - Asia @ Every 4 weeks from 10am to 10:50am on Monday (GMT) (mbed-tls@lists.trustedfirmware.org)

by Shaun Longhorn

This event has been updated with a note: "Pushing meeting link" Changed: location MBed-TLS Technical Forum - Asia Every 4 weeks from 10am to 10:50am on Monday United Kingdom Time Location https://linaro-org.zoom.us/j/97758661706?pwd=baMjUvnWbY20z3ignQca7QVahhozkI… https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9775866… Join Zoom Meeting https://linaro-org.zoom.us/j/99853938085?pwd=D3au597hb9J1veo1W74pIqkvY6VaDI… Join by phone (US) +1 833-548-0282 passcode: 12278212 Joining instructions https://www.google.com/url?q=https://applications.zoom.us/addon/invitation/… Joining notes Meeting host: shaun.longhorn(a)linaro.org Join Zoom Meeting: https://linaro-org.zoom.us/j/99853938085?pwd=D3au597hb9J1veo1W74pIqkvY6VaDI… ──────────https://linaro-org.zoom.us/j/99853938085?pwd=D3au597hb9J1veo1W74pIqkvY6VaDI.1&jst=2Joining Instructions────────── Guests mbed-tls(a)lists.trustedfirmware.org psa-crypto(a)lists.trustedfirmware.org View all guest info https://calendar.google.com/calendar/event?action=VIEW&eid=NjI4c3NnYjFoZHRh… Reply for mbed-tls(a)lists.trustedfirmware.org and view more details https://calendar.google.com/calendar/event?action=VIEW&eid=NjI4c3NnYjFoZHRh… Your attendance is optional. ~~//~~ 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

1 day, 20 hours

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Synced invitation: MBed-TLS Technical Forum - Asia @ Every 4 weeks from 10am to 10:50am on Monday (BST) (mbed-tls@lists.trustedfirmware.org)

by Shaun Longhorn

This email keeps the event up to date in your calendar. MBed-TLS Technical Forum - Asia Every 4 weeks from 10am to 10:50am on Monday United Kingdom Time Location https://linaro-org.zoom.us/j/97758661706?pwd=baMjUvnWbY20z3ignQca7QVahhozkI… https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9775866… Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: MBed-TLS Technical Forum - AsiaTime: 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… Zoom Meetinghttps://linaro-org.zoom.us/j/97758661706?pwd=baMjUvnWbY20z3ignQca7QVahhozkI.1Meeting ID: 977 5866 1706Passcode: 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-freeMeeting ID: 977 5866 1706Find your local number: https://linaro-org.zoom.us/u/acdtApJNbc Guests mbed-tls(a)lists.trustedfirmware.org psa-crypto(a)lists.trustedfirmware.org ~~//~~ 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

1 day, 20 hours

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Updated invitation with note: MBed TLS Technical Forum - US @ Every 4 weeks from 4:30pm to 5:30pm on Monday (BST) (mbed-tls@lists.trustedfirmware.org)

by Shaun Longhorn

This event has been updated with a note: "Pushing to fix meeting link issue" Changed: location MBed TLS Technical Forum - US Every 4 weeks from 4:30pm to 5:30pm on Monday United Kingdom Time Location https://linaro-org.zoom.us/j/93546216467?pwd=ja9Nxd0uLBn04jg1Be0NTy17Konzfl… https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9354621… Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: MBed TLS Technical Forum - USTime: May 4, 2026 04:30 PM LondonEvery 4 weeks on Mon, 38 occurrence(s)Please download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJcoc--qrz0uHNNmuZMtfpylBgIZjC2so7xz/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/93546216467?pwd=ja9Nxd0uLBn04jg1Be0NTy17Konzfl.1Meeting ID: 935 4621 6467Passcode: 683772---One tap mobile+13126266799,,93546216467# US (Chicago)+13462487799,,93546216467# US (Houston)---Dial by your location• +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)• +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• 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• 833 548 0282 US Toll-free• 833 928 4608 US Toll-freeMeeting ID: 935 4621 6467Find your local number:https://linaro-org.zoom.us/u/azKzC20VI Guests psa-crypto(a)lists.trustedfirmware.org mbed-tls(a)lists.trustedfirmware.org hordijk(a)aurora.tech Ben Taylor cjej65eug(a)gmail.com View all guest info https://calendar.google.com/calendar/event?action=VIEW&eid=dm9wcGhnbnZvMnRh… Reply for mbed-tls(a)lists.trustedfirmware.org and view more details https://calendar.google.com/calendar/event?action=VIEW&eid=dm9wcGhnbnZvMnRh… Your attendance is optional. ~~//~~ 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

1 day, 20 hours

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extract AKI info from cert via mbedtls ?

by Danny Backx

Hi, How can I extract the AKI (Authority Key Identifier) from a certificate using mbedtls ? I could parse the certificate file itself, I guess, but isn't that what mbedtls does? Thanks, Danny https://www.rfc-editor.org/info/rfc5280#section-4.2.1.1 -- Danny Backx - dannybackx(a)telenet.be

1 week, 5 days

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Proposal to unify tf.org vulnerability referencing in NVD

by sandrine.afsa＠arm.com

The content of this message was lost. It was probably cross-posted to multiple lists and previously handled on another list.

3 weeks, 6 days

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CI infrastructure scheduled maintenance: 4th June Sep 2026

by Saheer Babu

Hi all, We will be upgrading Cloudbees CI and clusters hosting review.trustedfirmware.org and ci.trustedfirmware.org on Wednesday, 3rd June 2025 at 16:00 GMT+1. During this maintenance window, both services will be unavailable for approximately 8 hours. A follow-up email will be sent once the services are fully restored. Best regards, Saheer [LOGO SMALL] Saheer Babu Principal Software Engineer CESW – Engineering Infrastructure

4 weeks

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need help migrating to mbedtls 4.0 (esp32)

by Danny Backx

I got into trouble with migrating to the latest (v6.0) version of esp-idf, because it implies a migration to mbedtls 4.0. I had a working application (library really) to obtain ACME certificates from letsencrypt.org. I tried porting, but ran into trouble. So please help. To debug, I try to mimic the example in Appendix A.2 of RFC 7515. Where this should obviously succeed, the current output I get is : I (12:57:46.067) main_task: Calling app_main() I (12:57:46.088) Crypto: Acme standalone client example © 2026 by Danny Backx I (12:57:46.089) Crypto: checkRfc7515_a21 Base64({"alg":"RS256"}) -> eyJhbGciOiJSUzI1NiJ9 is correct I (12:57:46.094) Crypto: checkRfc7515_a21 Base64({"iss":"joe", "exp":1300819380, "http://example.com/is_root":true}) -> eyJpc3MiOiJqb2UiLA0KICJleHAiOjEzMDA4MTkzODAsDQogImh0dHA6Ly9leGFtcGxlLmNvbS9pc19yb290Ijp0cnVlfQ is correct I (12:57:46.121) Crypto: checkRfc7515_a21 importPrivateKey() -> 1073741825 E (12:57:46.122) psa_crypto: psa_get_and_lock_key_slot_with_policy psa_key_policy_permits -> -133 E (12:57:46.129) psa_crypto: psa_sign_internal psa_get_and_lock_key_slot_with_policy -> -133 E (12:57:46.137) Crypto: psa_sign_hash (key 1073741825) failed (not permitted, -133 0x0085) I (12:57:46.145) Crypto: checkRfc7515_a21 Signature(eyJhbGciOiJSUzI1NiJ9,eyJpc3MiOiJqb2UiLA0KICJleHAiOjEzMDA4MTkzODAsDQogImh0dHA6Ly9leGFtcGxlLmNvbS9pc19yb290Ijp0cnVlfQ) -> (null) E (12:57:46.161) Crypto: Signature 0, fail E (12:57:46.165) Crypto: RFC 7515 A.2.1 : validation failed Some of the "psa_crypto" lines come from debug statements I added in the library. The whole source for this is in one file at https://sourceforge.net/p/esp32-acme-client/code/HEAD/tree/trunk/examples/s… . Obviously it's the hashing step which I had under control with a previous library which I don't call correctly (or I don't know how to import the right key). What am I doing wrong ? Thanks, Danny -- Danny Backx - dannybackx(a)telenet.be

1 month, 1 week

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mbedtls_ssl_read() return code MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET

by Fabian Keil

I'm currently working on adding MbedTLS 4.x support for Privoxy [0] and noticed that mbedtls_ssl_read() frequently returns MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET. Apparently the error code was added in f8a4994ec7 and marked experimental in da13072c5b. It doesn't seem explicitly documented at [1], but of course it's covered by "or another negative error code". My current solution is to simply continue reading: extern int ssl_recv_data(struct ssl_attr *ssl_attr, unsigned char *buf, size_t max_length) { [...] do { ret = mbedtls_ssl_read(ssl, buf, max_length); #if MBEDTLS_VERSION_MAJOR > 3 if (ret == MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET) { log_error(LOG_LEVEL_CONNECT, "mbedtls_ssl_read() reported new session ticket for " "the connection on socket %d.", ssl_attr->mbedtls_attr.socket_fd.fd); } #endif } while (ret == MBEDTLS_ERR_SSL_WANT_READ #if MBEDTLS_VERSION_MAJOR > 3 || ret == MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET #endif || ret == MBEDTLS_ERR_SSL_WANT_WRITE); When using MbedTLS 4.1.0 on ElectroBSD 14.4-STABLE this seems to work. For some connections the log message is emitted once, for others it's emitted twice: 09:20:58.982 024 Connect: Connected to 127.0.1.2[127.0.1.2]:9050. 09:20:59.222 024 Connect: Created new connection to www.electrobsd.org:443 on socket 9. 09:20:59.243 024 Connect: Performing the TLS handshake with the server. 09:20:59.583 024 Connect: Server successfully connected over TLSv1.3 (TLS1-3-CHACHA20-POLY1305-SHA256). 09:20:59.583 024 Connect: Encrypted request sent. 09:20:59.809 024 Connect: mbedtls_ssl_read() reported new session ticket for the connection on socket 9. 09:20:59.902 024 Connect: mbedtls_ssl_read() reported new session ticket for the connection on socket 9. 09:21:00.041 024 Header: scan: HTTP/1.1 200 OK I noticed that there's already an open ticket [2] which contains the sentence: | For client side, mbedtls_ssl_{read,write} might return the error also, | we should process it in the error handler also. I haven't seen mbedtls_ssl_write() return MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET yet, though. Can you confirm that handling MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET by continuing reading is currently the best option? Thanks. Fabian [0]: <https://www.privoxy.org/> [1]: <https://os.mbed.com/teams/sandbox/code/mbedtls/docs/tip/ssl_8h.html#aa2c29e…> [2]: <https://github.com/Mbed-TLS/mbedtls/issues/6640>

2 months, 1 week

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Could anyone please handle this PR?

by Elsa zz

Hi, Could anyone please handle this PR? Fix build warning/error using llvm-mingw: - https://github.com/Mbed-TLS/mbedtls/pull/10695 Thanks!

2 months, 2 weeks

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Max. heap size for X509 certificate chain verification

by Huber, Ralf

Dear Mbed TLS contributors, I am working on an embedded project where we need to verify an X509 certificate chain with up to 4 certificates (root cert + 2 intermediates + client cert) and a CRL. The certificates contain public keys for ECDSA for the SECP_R1_256 curve. We are using mbedTLS 4.x. There is no heap memory in this project. It is a vehicle control ECU and all RAM is normally statically allocated for safety reasons. However, the certificate verification is not safety critical. It is OK for us to use mbedtls_memory_buffer_alloc_init() as a heap replacement for mbedTLS. I will refer to this as the "heap" for the rest of this mail. I would like to find out how large the heap needs to be for the chain verification. The system requirements state that it shall support certificates and CRL in DER format with a size of up to 2 kB each. There are 10 kB of static RAM buffer to store 4 certificates and the CRL. The certificates are parsed with mbedtls_x509_crt_parse_der_nocopy(), so the certificate raw data is not duplicated on the heap. The CRL is parsed with mbedtls_x509_crl_parse_der(), so I am expecting that the CRL raw data will be copied to the heap. Thus, it needs to be at least 2 kB. Unfortunately, there seems to be no "_nocopy()" function for CRLs. 8 kB heap was enough in my tests to verify a chain of 3 test certificates with sizes of ca. 0.5 kB each. 6 kB heap wasn't enough to do this. Is there a way to calculate or at least estimate the maximum required heap for the given maximum certificate and CRL sizes, such that a call of mbedtls_x509_crt_verify() for the chain will never fail due to insufficient memory? Is the required heap size fixed for a given number of certificates, or does it depend on the content of the certificates? If it does depend on the content, is there some way to construct "worst case certificates" that result in maximum heap usage, so I could use them to measure the heap consumption? Any help on this topic is kindly appreciated! Best regards, Ralf Huber KION Supply Chain Solutions Linde Material Handling GmbH, Sitz der Gesellschaft: Aschaffenburg, Registergericht: Aschaffenburg HRB9963, Ust-IdNr. DE814809128, Gesch?ftsf?hrung: Andreas Krinninger (Vorsitzender), Dr. Karoline Jung-Senssfelder, Ulrike Just, Dr. Frank Schepp, Vorsitzende des Aufsichtsrats: Valeria Gargiulo

2 months, 2 weeks

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Migration from Mbed TLS 2.x to 3.6.x — key export

by Piotr Kurowski (Nokia)

Dear MbedTLS team, I maintain the Mbed TLS integration for our embedded products. We are still migrating from Mbed TLS 2.x to 3.6.x and need guidance on replacing the legacy SSL key export behavior. One of our legacy products utilizes handshake key material from mbedtls_ssl_conf_export_keys_cb in an accelerator. For compatibility with existing deployments, we must preserve this key export so the other side can decode. Section “SSL key export interface change” in 3.0-migration-guide.md (as referenced for the 3.6.x line) states that mbedtls_ssl_conf_export_keys_cb() and mbedtls_ssl_conf_export_keys_ext_cb() were replaced with mbedtls_ssl_set_export_keys_cb(), and that the new callback no longer exports raw keys and IV. The guide suggests that applications requiring raw traffic keys may derive them from the master secret and handshake transcript hashes from the on-wire data. I'm not sure how this can be coded. What is the recommended way to obtain or derive the raw keys and IV (or equivalent data) under the 3.6.x API? Could you point to documentation, examples of code would be very beneficial. We would also like to align with the 4.1.x in future. If there are changes in this area, we are interested in a common and supported approach to avoid repeated breaking migrations. Thank you for your time. Kind regards, Piotr

3 months

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Synced invitation: MBed TLS Technical Forum - US @ Mon 4 May 2026 4:30pm - 5:30pm (BST) (mbed-tls@lists.trustedfirmware.org)

by shaun.longhorn＠linaro.org

This email keeps the event up to date in your calendar. MBed TLS Technical Forum - US Monday 4 May 2026 ⋅ 4:30pm – 5:30pm United Kingdom Time Trusted Firmware is inviting you to a scheduled Zoom meeting.Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: MBed TLS Tech Forum - USTime: Aug 28, 2023 04:30 PM London Every 4 weeks on Mon, 20 occurrence(s) Aug 28, 2023 04:30 PM Sep 25, 2023 04:30 PM Oct 23, 2023 04:30 PM Nov 20, 2023 04:30 PM Dec 18, 2023 04:30 PM Jan 15, 2024 04:30 PM Feb 12, 2024 04:30 PM Mar 11, 2024 04:30 PM Apr 8, 2024 04:30 PM May 6, 2024 04:30 PM Jun 3, 2024 04:30 PM Jul 1, 2024 04:30 PM Jul 29, 2024 04:30 PM Aug 26, 2024 04:30 PM Sep 23, 2024 04:30 PM Oct 21, 2024 04:30 PM Nov 18, 2024 04:30 PM Dec 16, 2024 04:30 PM Jan 13, 2025 04:30 PM Feb 10, 2025 04:30 PMPlease download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJ0udu2spj0vHtbQtlCmHwhHCT7ECtJI39J4/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/99314486542?pwd=Q1ZjaFhQeDRrQWxsa3MvT1Mwditqdz09Meeting ID: 993 1448 6542Passcode: 628327---One tap mobile+13462487799,,99314486542# US (Houston)+16694449171,,99314486542# US---Dial by your location• +1 346 248 7799 US (Houston)• +1 669 444 9171 US• +1 669 900 9128 US (San Jose)• +1 719 359 4580 US• +1 253 205 0468 US• +1 253 215 8782 US (Tacoma)• +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• +1 689 278 1000 US• +1 301 715 8592 US (Washington DC)• +1 305 224 1968 US• +1 309 205 3325 US• +1 312 626 6799 US (Chicago)• 877 853 5247 US Toll-free• 888 788 0099 US Toll-freeMeeting ID: 993 1448 6542Find your local number: https://linaro-org.zoom.us/u/adSjuOyMhI Guests psa-crypto(a)lists.trustedfirmware.org mbed-tls(a)lists.trustedfirmware.org ~~//~~ 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

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Synced invitation: MBed TLS Technical Forum - US @ Mon 6 Apr 2026 4:30pm - 5:30pm (BST) (mbed-tls@lists.trustedfirmware.org)

by shaun.longhorn＠linaro.org

This email keeps the event up to date in your calendar. MBed TLS Technical Forum - US Monday 6 Apr 2026 ⋅ 4:30pm – 5:30pm United Kingdom Time Trusted Firmware is inviting you to a scheduled Zoom meeting.Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: MBed TLS Tech Forum - USTime: Aug 28, 2023 04:30 PM London Every 4 weeks on Mon, 20 occurrence(s) Aug 28, 2023 04:30 PM Sep 25, 2023 04:30 PM Oct 23, 2023 04:30 PM Nov 20, 2023 04:30 PM Dec 18, 2023 04:30 PM Jan 15, 2024 04:30 PM Feb 12, 2024 04:30 PM Mar 11, 2024 04:30 PM Apr 8, 2024 04:30 PM May 6, 2024 04:30 PM Jun 3, 2024 04:30 PM Jul 1, 2024 04:30 PM Jul 29, 2024 04:30 PM Aug 26, 2024 04:30 PM Sep 23, 2024 04:30 PM Oct 21, 2024 04:30 PM Nov 18, 2024 04:30 PM Dec 16, 2024 04:30 PM Jan 13, 2025 04:30 PM Feb 10, 2025 04:30 PMPlease download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJ0udu2spj0vHtbQtlCmHwhHCT7ECtJI39J4/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/99314486542?pwd=Q1ZjaFhQeDRrQWxsa3MvT1Mwditqdz09Meeting ID: 993 1448 6542Passcode: 628327---One tap mobile+13462487799,,99314486542# US (Houston)+16694449171,,99314486542# US---Dial by your location• +1 346 248 7799 US (Houston)• +1 669 444 9171 US• +1 669 900 9128 US (San Jose)• +1 719 359 4580 US• +1 253 205 0468 US• +1 253 215 8782 US (Tacoma)• +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• +1 689 278 1000 US• +1 301 715 8592 US (Washington DC)• +1 305 224 1968 US• +1 309 205 3325 US• +1 312 626 6799 US (Chicago)• 877 853 5247 US Toll-free• 888 788 0099 US Toll-freeMeeting ID: 993 1448 6542Find your local number: https://linaro-org.zoom.us/u/adSjuOyMhI Guests psa-crypto(a)lists.trustedfirmware.org mbed-tls(a)lists.trustedfirmware.org ~~//~~ 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

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Updated invitation with note: MBed TLS Technical Forum - US @ Every 4 weeks from 4:30pm to 5:30pm on Monday (BST) (mbed-tls@lists.trustedfirmware.org)

by Shaun Longhorn

This event has been updated with a note: "Updated expired zoom link" Changed: title, time, description MBed TLS Technical Forum - US Every 4 weeks from 4:30pm to 5:30pm on Monday United Kingdom Time Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: MBed TLS Technical Forum - USTime: May 4, 2026 04:30 PM LondonEvery 4 weeks on Mon, 38 occurrence(s)Please download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJcoc--qrz0uHNNmuZMtfpylBgIZjC2so7xz/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/93546216467?pwd=ja9Nxd0uLBn04jg1Be0NTy17Konzfl.1Meeting ID: 935 4621 6467Passcode: 683772---One tap mobile+13126266799,,93546216467# US (Chicago)+13462487799,,93546216467# US (Houston)---Dial by your location• +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)• +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• 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• 833 548 0282 US Toll-free• 833 928 4608 US Toll-freeMeeting ID: 935 4621 6467Find your local number:https://linaro-org.zoom.us/u/azKzC20VI Guests psa-crypto(a)lists.trustedfirmware.org mbed-tls(a)lists.trustedfirmware.org View all guest info https://calendar.google.com/calendar/event?action=VIEW&eid=dm9wcGhnbnZvMnRh… Reply for mbed-tls(a)lists.trustedfirmware.org and view more details https://calendar.google.com/calendar/event?action=VIEW&eid=dm9wcGhnbnZvMnRh… Your attendance is optional. ~~//~~ 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

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Updated invitation: MBed TLS Technical Forum @ Every 4 weeks from 4:30pm to 5:30pm on Monday from Mon 13 Mar 2023 to Sun 31 May (GMT) (mbed-tls@lists.trustedfirmware.org)

by Shaun Longhorn

This event has been updated Changed: time MBed TLS Technical Forum Every 4 weeks from 4:30pm to 5:30pm on Monday from Monday 13 Mar 2023 to Sunday 31 May United Kingdom Time Trusted Firmware is inviting you to a scheduled Zoom meeting. Topic: MBed TLS Technical Forum Time: Oct 25, 2021 04:30 PM London Every 4 weeks on Mon, 20 occurrence(s) Oct 25, 2021 04:30 PM Nov 22, 2021 04:30 PM Dec 20, 2021 04:30 PM Jan 17, 2022 04:30 PM Feb 14, 2022 04:30 PM Mar 14, 2022 04:30 PM Apr 11, 2022 04:30 PM May 9, 2022 04:30 PM Jun 6, 2022 04:30 PM Jul 4, 2022 04:30 PM Aug 1, 2022 04:30 PM Aug 29, 2022 04:30 PM Sep 26, 2022 04:30 PM Oct 24, 2022 04:30 PM Nov 21, 2022 04:30 PM Dec 19, 2022 04:30 PM Jan 16, 2023 04:30 PM Feb 13, 2023 04:30 PM Mar 13, 2023 04:30 PM Apr 10, 2023 04:30 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://linaro-org.zoom.us/meeting/tJEkceuurT4sGdaksikbUn6FARB9Kuk3ac2o/ics… Join Zoom Meeting https://linaro-org.zoom.us/j/95962635632?pwd=STFkQVltejAzRDJ6NmoxZjhmZC9RUT… Meeting ID: 959 6263 5632 Passcode: 018366 One tap mobile +13462487799,,95962635632# US (Houston) +16699009128,,95962635632# US (San Jose) Dial by your location +1 346 248 7799 US (Houston) +1 669 900 9128 US (San Jose) +1 253 215 8782 US (Tacoma) +1 312 626 6799 US (Chicago) +1 646 558 8656 US (New York) +1 301 715 8592 US (Washington DC) 877 853 5247 US Toll-free 888 788 0099 US Toll-free Meeting ID: 959 6263 5632 Find your local number: https://linaro-org.zoom.us/u/aewUpnQu5y Guests psa-crypto(a)lists.trustedfirmware.org mbed-tls(a)lists.trustedfirmware.org View all guest info https://calendar.google.com/calendar/event?action=VIEW&eid=ZGExMnNqcDB1MDFm… Reply for mbed-tls(a)lists.trustedfirmware.org and view more details https://calendar.google.com/calendar/event?action=VIEW&eid=ZGExMnNqcDB1MDFm… Your attendance is optional. ~~//~~ 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

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Synced invitation: MBed TLS Technical Forum - US @ Every 4 weeks from 4:30pm to 5:30pm on Monday from Mon 28 Aug 2023 to Sun 31 May (BST) (mbed-tls@lists.trustedfirmware.org)

by Shaun Longhorn

This email keeps the event up to date in your calendar. MBed TLS Technical Forum - US Every 4 weeks from 4:30pm to 5:30pm on Monday from Monday 28 Aug 2023 to Sunday 31 May United Kingdom Time Trusted Firmware is inviting you to a scheduled Zoom meeting.Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: MBed TLS Tech Forum - USTime: Aug 28, 2023 04:30 PM London Every 4 weeks on Mon, 20 occurrence(s) Aug 28, 2023 04:30 PM Sep 25, 2023 04:30 PM Oct 23, 2023 04:30 PM Nov 20, 2023 04:30 PM Dec 18, 2023 04:30 PM Jan 15, 2024 04:30 PM Feb 12, 2024 04:30 PM Mar 11, 2024 04:30 PM Apr 8, 2024 04:30 PM May 6, 2024 04:30 PM Jun 3, 2024 04:30 PM Jul 1, 2024 04:30 PM Jul 29, 2024 04:30 PM Aug 26, 2024 04:30 PM Sep 23, 2024 04:30 PM Oct 21, 2024 04:30 PM Nov 18, 2024 04:30 PM Dec 16, 2024 04:30 PM Jan 13, 2025 04:30 PM Feb 10, 2025 04:30 PMPlease download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJ0udu2spj0vHtbQtlCmHwhHCT7ECtJI39J4/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/99314486542?pwd=Q1ZjaFhQeDRrQWxsa3MvT1Mwditqdz09Meeting ID: 993 1448 6542Passcode: 628327---One tap mobile+13462487799,,99314486542# US (Houston)+16694449171,,99314486542# US---Dial by your location• +1 346 248 7799 US (Houston)• +1 669 444 9171 US• +1 669 900 9128 US (San Jose)• +1 719 359 4580 US• +1 253 205 0468 US• +1 253 215 8782 US (Tacoma)• +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• +1 689 278 1000 US• +1 301 715 8592 US (Washington DC)• +1 305 224 1968 US• +1 309 205 3325 US• +1 312 626 6799 US (Chicago)• 877 853 5247 US Toll-free• 888 788 0099 US Toll-freeMeeting ID: 993 1448 6542Find your local number: https://linaro-org.zoom.us/u/adSjuOyMhI Guests psa-crypto(a)lists.trustedfirmware.org mbed-tls(a)lists.trustedfirmware.org ~~//~~ 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

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Canceled event with note: MBed TLS Technical Forum - US @ Mon 6 Apr 2026 4:30pm - 5:30pm (BST) (mbed-tls@lists.trustedfirmware.org)

by Shaun Longhorn

This event has been canceled with a note: "cancelled due to holidays" MBed TLS Technical Forum - US Monday 6 Apr 2026 ⋅ 4:30pm – 5:30pm United Kingdom Time Trusted Firmware is inviting you to a scheduled Zoom meeting.Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: MBed TLS Tech Forum - USTime: Aug 28, 2023 04:30 PM London Every 4 weeks on Mon, 20 occurrence(s) Aug 28, 2023 04:30 PM Sep 25, 2023 04:30 PM Oct 23, 2023 04:30 PM Nov 20, 2023 04:30 PM Dec 18, 2023 04:30 PM Jan 15, 2024 04:30 PM Feb 12, 2024 04:30 PM Mar 11, 2024 04:30 PM Apr 8, 2024 04:30 PM May 6, 2024 04:30 PM Jun 3, 2024 04:30 PM Jul 1, 2024 04:30 PM Jul 29, 2024 04:30 PM Aug 26, 2024 04:30 PM Sep 23, 2024 04:30 PM Oct 21, 2024 04:30 PM Nov 18, 2024 04:30 PM Dec 16, 2024 04:30 PM Jan 13, 2025 04:30 PM Feb 10, 2025 04:30 PMPlease download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJ0udu2spj0vHtbQtlCmHwhHCT7ECtJI39J4/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/99314486542?pwd=Q1ZjaFhQeDRrQWxsa3MvT1Mwditqdz09Meeting ID: 993 1448 6542Passcode: 628327---One tap mobile+13462487799,,99314486542# US (Houston)+16694449171,,99314486542# US---Dial by your location• +1 346 248 7799 US (Houston)• +1 669 444 9171 US• +1 669 900 9128 US (San Jose)• +1 719 359 4580 US• +1 253 205 0468 US• +1 253 215 8782 US (Tacoma)• +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• +1 689 278 1000 US• +1 301 715 8592 US (Washington DC)• +1 305 224 1968 US• +1 309 205 3325 US• +1 312 626 6799 US (Chicago)• 877 853 5247 US Toll-free• 888 788 0099 US Toll-freeMeeting ID: 993 1448 6542Find your local number: https://linaro-org.zoom.us/u/adSjuOyMhI Guests psa-crypto(a)lists.trustedfirmware.org mbed-tls(a)lists.trustedfirmware.org ~~//~~ 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

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Announcing the releases of Mbed TLS 3.6.6, Mbed TLS 4.1.0 & TF-PSA-Crypto 1.1.0

by Minos Galanakis

Hi Mbed TLS users, We have released Mbed TLS 4.1.0, Mbed TLS 3.6.6, and TF-PSA-Crypto 1.1.0. These releases address several security issues, include bug fixes, and bring other improvements. Mbed TLS 4.1.0 and TF-PSA-Crypto 1.1.0 are new Long Term Support (LTS) releases and will be supported until March 2029. Mbed TLS 3.6 remains supported until March 2027. We recommend all users review the changes, assess any impact, and upgrade as appropriate. Full details are available in the release notes: https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-4.1.0 https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-3.6.6 https://github.com/Mbed-TLS/TF-PSA-Crypto/releases/tag/tf-psa-crypto-1.1.0 Kind regards, The Mbed TLS Team

3 months

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[Mbed-tls-announce] Announcing the releases of Mbed TLS 3.6.6, Mbed TLS 4.1.0 & TF-PSA-Crypto 1.1.0

by Minos Galanakis via Mbed-tls-announce

Hi Mbed TLS users, We have released Mbed TLS 4.1.0, Mbed TLS 3.6.6, and TF-PSA-Crypto 1.1.0. These releases address several security issues, include bug fixes, and bring other improvements. Mbed TLS 4.1.0 and TF-PSA-Crypto 1.1.0 are new Long Term Support (LTS) releases and will be supported until March 2029. Mbed TLS 3.6 remains supported until March 2027. We recommend all users review the changes, assess any impact, and upgrade as appropriate. Full details are available in the release notes: https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-4.1.0 https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-3.6.6 https://github.com/Mbed-TLS/TF-PSA-Crypto/releases/tag/tf-psa-crypto-1.1.0 Kind regards, The 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

3 months

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Canceled event with note: MBed TLS Technical Forum - US @ Mon 4 May 2026 4:30pm - 5:30pm (BST) (mbed-tls@lists.trustedfirmware.org)

by Shaun Longhorn

This event has been canceled with a note: "Cancelled due to holidays" MBed TLS Technical Forum - US Monday 4 May 2026 ⋅ 4:30pm – 5:30pm United Kingdom Time Trusted Firmware is inviting you to a scheduled Zoom meeting.Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: MBed TLS Tech Forum - USTime: Aug 28, 2023 04:30 PM London Every 4 weeks on Mon, 20 occurrence(s) Aug 28, 2023 04:30 PM Sep 25, 2023 04:30 PM Oct 23, 2023 04:30 PM Nov 20, 2023 04:30 PM Dec 18, 2023 04:30 PM Jan 15, 2024 04:30 PM Feb 12, 2024 04:30 PM Mar 11, 2024 04:30 PM Apr 8, 2024 04:30 PM May 6, 2024 04:30 PM Jun 3, 2024 04:30 PM Jul 1, 2024 04:30 PM Jul 29, 2024 04:30 PM Aug 26, 2024 04:30 PM Sep 23, 2024 04:30 PM Oct 21, 2024 04:30 PM Nov 18, 2024 04:30 PM Dec 16, 2024 04:30 PM Jan 13, 2025 04:30 PM Feb 10, 2025 04:30 PMPlease download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJ0udu2spj0vHtbQtlCmHwhHCT7ECtJI39J4/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/99314486542?pwd=Q1ZjaFhQeDRrQWxsa3MvT1Mwditqdz09Meeting ID: 993 1448 6542Passcode: 628327---One tap mobile+13462487799,,99314486542# US (Houston)+16694449171,,99314486542# US---Dial by your location• +1 346 248 7799 US (Houston)• +1 669 444 9171 US• +1 669 900 9128 US (San Jose)• +1 719 359 4580 US• +1 253 205 0468 US• +1 253 215 8782 US (Tacoma)• +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• +1 689 278 1000 US• +1 301 715 8592 US (Washington DC)• +1 305 224 1968 US• +1 309 205 3325 US• +1 312 626 6799 US (Chicago)• 877 853 5247 US Toll-free• 888 788 0099 US Toll-freeMeeting ID: 993 1448 6542Find your local number: https://linaro-org.zoom.us/u/adSjuOyMhI Guests psa-crypto(a)lists.trustedfirmware.org mbed-tls(a)lists.trustedfirmware.org ~~//~~ 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

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Notice of refactoring of C11 and Unix-like platform adherence

by Gilles Peskine

Hello, In the next release of TF-PSA-Crypto 1.1.0 and Mbed TLS 4.1.0, we have made significant changes to code that detects features that are not part of C99 proper. The changes are mainly: * Uniformization of POSIX/Unix feature detection macros. * Assume a C99-compliant printf (dropping hacks for ancient MSVC and forcing compliant printf on MinGW). * Expansion of “static assert” in C99 when an official C11 static_assert isn't available. We believe the new code to be standards-compliant, however it may break the build on some platforms that are not strictly POSIX compliant or cause some new compiler warnings. If you use TF-PSA-Crypto or Mbed TLS on a “less mainstream” Unix-like platform, or with a compiler that isn't GCC or Clang, and the break builds for you, please open a pull request with the necessary fixes (probably in core/tf_psa_crypto_platform_requirements.h, core/tf_psa_crypto_common.h, or library/mbedtls_platform_requirements.h). We have also made some minor changes in the Mbed TLS 3.6 long-time support branch. They are significantly less expansive, but may affect platforms that are mostly Linux-like but are not Linux or are using an unusual libc. Best regards, -- Gilles Peskine TF-PSA-Crypto and Mbed TLS developer

3 months, 3 weeks

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ECDH and key interfaces on development branch

by Leonie Reichert

Dear MbedTLS contributors, I'm reaching out with a question regarding the ECDH and similar interfaces on the MbedTLS development branch. I hope this mailing list is the appropriate venue for this discussion. I am preparing a pull request for an implementation of the Hybrid Public Key Encryption (HPKE) standard for MbedTLS/TF-PSA-Crypo. It seems like the development branch at TF-PSA-Crypo does not seem to support ecdh.h anymore. While this is not seem to be explicitly stated anywhere, there are instructions on how to use the PSA interface instead to create ECDH keys. Now my question: So the my code meets the desired quality criteria, does all other key interfaces also have to be changed? I am using the ECP interface a lot, so mbedtls_ecp_group_init, mbedtls_ecp_point_init, mbedtls_ecp_keypair_init and so on. The functions are still available but the instructions in psa_tranistion.md in Section "translating a legacy ephemeral key agreement TLS server workflow" make me believe that using non-psa key interfaces might be undesirable in MbedTLS in general. I would greatly appreciate any clarification on this matter. Best regards, Leonie [ABB logotype] — Dr. Leonie Reichert Research Scientist "Secure Connected Systems" ABB AG Kallstadter Strasse 1 Mannheim Mobile: +49 160 99002896 E-mail: leonie.reichert(a)de.abb.com<mailto:leonie.reichert@de.abb.com> abb.com<https://www.abb.com/> [ABB logotype] ABB AG Sitz/Head Office: Mannheim Registergericht/Registry Court: Mannheim Handelsregisternummer/Commercial Register No.: HRB 4664 Vorstand/Managing Board: Klaus Eble (Vorsitzender/Chairman), Alexander Zumkeller Vorsitzender des Aufsichtsrats/ Chairman of Supervisory Board: Adrian Guggisberg Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser Mail ist nicht gestattet. Bitte beachten Sie auch unsere Datenschutzerklärung, die Sie auf unserer Webseite<https://new.abb.com/privacy-policy/de/datenschutz> finden. This E-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this E-mail in error) please notify the sender immediately and destroy this E-mail. Any unauthorized copying, disclosure or distribution of the material in this E-mail is strictly forbidden. Please also take note of our privacy notice, which you can find on our webpage<https://new.abb.com/privacy-notice>.

4 months

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[TLS 1.2][ECDHE][RX65N] point is not on curve (secp256r1)

by Adrien LEGER

Hello, I am using mbedTLS 3.6.5 on a Renesas RX65N with compiler ccrx. I am implementing a TLS 1.2 server using: - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 - ECDSA P-256 server certificate - ECDHE secp256r1 During the handshake (I use openssl s_client), I get: >>> TLS 1.2, Alert [length 0002], fatal illegal_parameter 02 2f 140605661713728:error:1012606B:elliptic curve routines:EC_POINT_set_affine_coordinates:point is not on curve:../crypto/ec/ec_lib.c:812: 140605661713728:error:141A4132:SSL routines:tls_process_ske_ecdhe:bad ecpoint:../ssl/statem/statem_clnt.c:2229: mbedtls_ecdh_make_params() returned -0x4C80 (MBEDTLS_ERR_ECP_INVALID_KEY) This happens right after: ssl_tls12_server.c:4304: server state: 4 ssl_tls12_server.c:3234: => write server key exchange ssl_tls12_server.c:2971: ECDHE curve: secp256r1 ssl_tls12_server.c:3075: value of 'ECDH: Q(X)' (256 bits) is: ssl_tls12_server.c:3075: f0 7e c6 f3 cc 41 71 bb a8 01 0b cc 3a 8a 5e 72 ssl_tls12_server.c:3075: 9d db bc d9 a1 5a 04 91 47 44 e0 ff 6f 42 de b3 ssl_tls12_server.c:3075: value of 'ECDH: Q(Y)' (255 bits) is: ssl_tls12_server.c:3075: 5e ba af af 86 55 1a 6e 04 a8 97 b4 13 12 c2 3c ssl_tls12_server.c:3075: a3 2e 00 a4 2d 44 e8 63 bf 98 08 74 81 94 5f 5e ssl_tls12_server.c:3130: pick hash algorithm 9 for signing ssl_tls.c:9231: Perform mbedtls-based computation of digest of ServerKeyExchange ssl_tls12_server.c:3148: dumping 'parameters hash' (32 bytes) ssl_tls12_server.c:3148: 0000: 2d b3 aa 62 c4 5a 87 18 39 a6 b6 91 0e 6d fb 81 -..b.Z..9....m.. ssl_tls12_server.c:3148: 0010: f7 55 38 54 33 1d 30 cc 85 83 10 2e 39 5c 5d 67 .U8T3.0.....9\]g ssl_tls12_server.c:3296: dumping 'my signature' (72 bytes) ssl_tls12_server.c:3296: 0000: 30 46 02 21 00 ee 81 dd 1f 32 62 66 57 5c 90 31 0F.!.....2bfW\.1 ssl_tls12_server.c:3296: 0010: a9 84 2a c4 e8 ee 6a c5 f0 db 39 01 58 d5 9c e3 ..*...j...9.X... ssl_tls12_server.c:3296: 0020: 6e e6 bd 04 25 02 21 00 f5 c6 89 97 d8 dd 2f 93 n...%.!......./. ssl_tls12_server.c:3296: 0030: d0 11 19 f7 0a e7 c4 6b ae 27 b8 d5 db b4 a9 2c .......k.'....., ssl_tls12_server.c:3296: 0040: 2f ec 2e b4 53 1a 72 01 I suspect an entropy / RNG issue. My RNG initialization is: - custom entropy source based on XXX - added via mbedtls_entropy_add_source(...) - CTR_DRBG seeded with personalization string "debug-seed" Do you see any problem in this setup ? Do not hesitate if you need any other information. I'm new to cryptography and currently learning TLS with mbedTLS. Thanks in advance, Adrien.

4 months, 1 week

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Performance Inquiry- High read/write latency observed in Mbedtls 3.6.2 (DTLS)

by Ankita Hatmode

Hi Team, We are working on an embedded security project using MbedTLS 3.6.2 for DTLS communication. As part of our performance evaluation, we analyzed the timing metrics for DTLS handshake and application data read/write operations. During testing, we observed that the time taken for data read and write operations is significantly higher than expected. [image: image.png] We would appreciate your guidance on the following: 1. What factors in MbedTLS could contribute to higher read/write latency? 2. Are there any known performance limitations or configuration settings that impact DTLS data transfer timing? 3. Are there recommended optimizations for embedded platforms to improve throughput? Please let us know if any more info is required. 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. ------------------------------------------------------------------------------------------------------------------------

4 months, 1 week

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mbedtls 2.28 - resumption in an ongoing session (abbreviated renegotiation)

by Tommaso Mancini

Hello, I am trying to test a device’s conformance to IEC62351-3 which defines some rules about TLS implementations, in particular im wondering if it’s possible to: Use mbedtls on a TLS server to accept a session resumption when a client sends a ClientHello message with a session ID in an ongoing TLS session. Also RFC 5246 says this about resumption for tls v1.2: The ClientHello message includes a variable-length session identifier. If not empty, the value identifies a session between the same client and server whose security parameters the client wishes to reuse. The session identifier MAY be from an earlier connection, this connection, or from another currently active connection. so it should be possible to resume in an ongoing session but: I already have a working implementation of a TLS 1.2 server using mbedtls 2.28, but if a client sends a clienthello with a session ID in an ongoing session, the server always responds with a renegotiation by default. Taking a look at the library code i tried to change the function: static void ssl_handle_id_based_session_resumption(mbedtls_ssl_context *ssl) found in the file ssl_srv.c in mbedtls 2.28, and removed a check which skipped resumption if a client hello was received during a session, this does not work properly however because the server closes the connection after sending the finished message due to a MBEDTLS_SSL_ALERT_MSG_DECRYPT_ERROR. Im wondering if there is anyway to allow resumption in this manner using mbedtls or if im doing something wrong? If you require further information please let me know and i will try to add as much as i can! [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.

5 months

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Some problems regarding mbed TLS

by Milorad Podoaba

Hello, Our devices are connecting to AWS IoT Core. Recently we had few customers with poor connection complaining that the device didn't reconnect. We are using ARM Keil MDK 8.1.0 + mbed TLS 3.6.4. On Wireshark logs we have identified 2 errors: 1. close notify from server after client hello 2. bad certificate or unknown CA from client after server hello The device was stuck on one of these errors and only a reboot would fix it. I think these 2 errors are not related. On detail analysis for the first error, we saw that the cipher suites list was missing and that was the reason for close notify from server. Looking at the TLS code saw that the list is being created only one time after reboot. So in ssl_ciphersuites.c just commented out supported_init = 1 and now seems to be good. I do not know the reason why the list was lost during runtime. For the second error, we were able to reproduce the problem quite consistently. Some logs at IoT client code showed that somehow the TLS lost the ability to parse properly the server certificates. I believe that this was some memory allocation problem, so I've configured the mbed TLS to get allocation from a separate buffer and that seems to fix the problem. This buffer has to be quite large, 56k size. Any smaller size would return memory allocation failure. Any reason why it has to be so big? Just want to know if someone had before these issues and if I can lower the buffer. Let me know if you need extra details about the problems. Thank you and regards, Milo -- MiloradPodoaba Firmware System Engineer Arrowhead Alarm Products Ltd. (09) 414 0085 <tel:%2809%29%20414%200085%20%20%20> milo(a)aap.co.nz <mailto:milo@aap.co.nz> www.aap.co.nz <//www.aap.co.nz> 1A Emirali Road, Silverdale, Auckland, New Zealand facebook <https://www.facebook.com/ArrowheadAlarmProductsLtd/?hc_ref=ARTrnwMZmLZimX6K…> linkedin <https://www.linkedin.com/company/arrowhead-alarm-products-ltd-/> instagram <https://instagram.com/aapltd?igshid=1356ehzmruf5r>

5 months

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Fwd: Some problems regarding mbed TLS

by Ben Taylor

Also anything you can share around the size and quantity of certificates you are parsing would be useful. 56K does seem very high, though if at the time you are parsing large numbers of large certificates it could get up that far. Regards Ben ---------- Forwarded message --------- From: Ben Taylor <ben.taylor(a)linaro.org> Date: Tue, 27 Jan 2026 at 11:33 Subject: Re: [mbed-tls] Some problems regarding mbed TLS To: Milorad Podoaba <milo(a)aap.co.nz> Hi Milo, For the second issue the memory allocation problem if you are able to share your mbedtls configuration, that would be useful as customising this could impact how much is allocated. Beyond this anything further you can share about how you are using the library when you encounter high usage would be useful. Ideally a code snippet which reproduces the error, though if not any further information will help us reproduce the error and attempt to assist you. For the first issue again if you can share your config and any code snippets you have that can reproduce the issue that would be helpful. Many thanks Ben On Mon, 26 Jan 2026 at 20:54, Milorad Podoaba <milo(a)aap.co.nz> wrote: > Hi Ben, > > Not sure how much code you want me to share. You need to be more specific. > There might be a memory problem in our application, it just hard to tell > and the mbed TLS seems not able to recover. > > At this stage, I only want to reduce the size of the buffer for the > alternative memory alloc. > Do you know a way to do it? > > Thank you and regards, > Milo > > > Milorad Podoaba > > Firmware System Engineer > > Arrowhead Alarm Products Ltd. > > > > (09) 414 0085 <%2809%29%20414%200085%20%20%20> > milo(a)aap.co.nz > www.aap.co.nz <//www.aap.co.nz> > 1A Emirali Road, Silverdale, Auckland, New Zealand > > > > [image: facebook] > <https://www.facebook.com/ArrowheadAlarmProductsLtd/?hc_ref=ARTrnwMZmLZimX6K…> > > [image: linkedin] > <https://www.linkedin.com/company/arrowhead-alarm-products-ltd-/> > > [image: instagram] <https://instagram.com/aapltd?igshid=1356ehzmruf5r> > > > On 27/01/2026 12:19 am, Ben Taylor wrote: > > Hi Milo, > Thanks for reporting this issue. Is there any chance you could > share some example code that can reproduce the error, so we can investigate > it further? > > Many thanks > > Ben > > On Mon, 26 Jan 2026 at 10:28, Milorad Podoaba via mbed-tls < > mbed-tls(a)lists.trustedfirmware.org> wrote: > >> Hello, >> >> Our devices are connecting to AWS IoT Core. >> Recently we had few customers with poor connection complaining that the >> device didn't reconnect. >> >> We are using ARM Keil MDK 8.1.0 + mbed TLS 3.6.4. >> >> On Wireshark logs we have identified 2 errors: >> >> 1. close notify from server after client hello >> 2. bad certificate or unknown CA from client after server hello >> >> The device was stuck on one of these errors and only a reboot would fix >> it. >> I think these 2 errors are not related. >> >> On detail analysis for the first error, we saw that the cipher suites >> list was missing and that was the reason for close notify from server. >> Looking at the TLS code saw that the list is being created only one time >> after reboot. >> So in ssl_ciphersuites.c just commented out supported_init = 1 and now >> seems to be good. >> I do not know the reason why the list was lost during runtime. >> >> For the second error, we were able to reproduce the problem quite >> consistently. >> Some logs at IoT client code showed that somehow the TLS lost the ability >> to parse properly the server certificates. >> I believe that this was some memory allocation problem, so I've >> configured the mbed TLS to get allocation from a separate buffer and that >> seems to fix the problem. >> This buffer has to be quite large, 56k size. Any smaller size would >> return memory allocation failure. >> Any reason why it has to be so big? >> >> Just want to know if someone had before these issues and if I can lower >> the buffer. >> Let me know if you need extra details about the problems. >> >> Thank you and regards, >> Milo >> >> >> -- >> Milorad Podoaba >> >> Firmware System Engineer >> >> Arrowhead Alarm Products Ltd. >> >> >> >> (09) 414 0085 <%2809%29%20414%200085%20%20%20> >> milo(a)aap.co.nz >> www.aap.co.nz <//www.aap.co.nz> >> 1A Emirali Road, Silverdale, Auckland, New Zealand >> >> >> >> [image: facebook] >> <https://www.facebook.com/ArrowheadAlarmProductsLtd/?hc_ref=ARTrnwMZmLZimX6K…> >> [image: linkedin] >> <https://www.linkedin.com/company/arrowhead-alarm-products-ltd-/> >> [image: instagram] <https://instagram.com/aapltd?igshid=1356ehzmruf5r> >> -- >> mbed-tls mailing list -- mbed-tls(a)lists.trustedfirmware.org >> To unsubscribe send an email to mbed-tls-leave(a)lists.trustedfirmware.org >> > >

5 months

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PSA Key derivation driver entry points

by Ruchika Gupta

Hi All, The PSA driver interface guide describes the driver entry points for key derivation. However the implementation seems to be missing from the psa crypto core layer. Can you help update if this is something which is being worked on ? I see a lot of tickets open related for key derivation interface dating back in 2022. Are these still relevant ? Regards, Ruchika

5 months, 3 weeks

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Canceled event: MBed-TLS Technical Forum - Asia @ Mon 29 Dec 2025 10am - 10:50am (GMT) (mbed-tls@lists.trustedfirmware.org)

by Shaun Longhorn

This event has been canceled. MBed-TLS Technical Forum - Asia Monday 29 Dec 2025 ⋅ 10am – 10:50am United Kingdom Time Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: MBed-TLS Technical Forum - AsiaTime: 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… Zoom Meetinghttps://linaro-org.zoom.us/j/97758661706?pwd=baMjUvnWbY20z3ignQca7QVahhozkI.1Meeting ID: 977 5866 1706Passcode: 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-freeMeeting ID: 977 5866 1706Find your local number: https://linaro-org.zoom.us/u/acdtApJNbc Guests mbed-tls(a)lists.trustedfirmware.org psa-crypto(a)lists.trustedfirmware.org ~~//~~ 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

6 months, 2 weeks

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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>

7 months, 2 weeks

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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

7 months, 2 weeks

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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

7 months, 2 weeks

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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 >

7 months, 3 weeks

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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

7 months, 3 weeks

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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

7 months, 3 weeks

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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.

8 months

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MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED

by Кристиян Ценов

8 months

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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.

8 months, 1 week

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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.

8 months, 2 weeks

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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.

8 months, 2 weeks

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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…

9 months

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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. ------------------------------------------------------------------------------------------------------------------------

9 months, 3 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

10 months

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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

10 months, 1 week

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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

10 months, 4 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.

11 months

2
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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

11 months, 1 week

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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>

11 months, 3 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… )

11 months, 4 weeks

1
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