Hi ,
*Problem description :*
Trying to run example
https://github.com/ARMmbed/mbedtls/blob/master/programs/ssl/ssl_server2.c .
Updated ssl_server2 port to listen on 7777 for incoming client request
,ssl_server2
will be waiting for remote connection continuously.
There was no client request for connection on this port, but still server
is getting some spurious connection request and goes for handshake and
fails with below error code.
Error code: mbedtls_ssl_handshake returned error -30976
*Steps to reproduce: =============*
1. start ssl_server2 program
2. Monitor for ssl_server2 connection waiting , observe ssl_server2 will
accept spurious connection request and goes for handshake and fails
with above
mentioned error code.
*Expected behavior:*
ssl_server2 wait for remote connection infinitely and connect to valid
client request and perform handshake every time.
*Actual behavior:*
Occasionally ssl_server2 will accept spurious connection request and goes
for handshake and fails with below error code.
Error code:
mbedtls_ssl_handshake returned error -30976 on ssl_server2
*Analysis:*
As per below logs what we understand is ssl_server2 will accept spurious
connection request and goes for handshake and fails with error code
-30796 ,MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO
on ssl_server2 side .
Can you please help us to understand this behavior?
What could be the reason for ssl_server2 to connect to a spurious
connection request?, as mentioned above there was no client request for
connection on this ssl_server2 port( 7777) .
We have tried this on other SERVER_PORT as well .
*Logs Snippet:*
*==========*
. Seeding the random number generator... ok
. Loading the CA root certificate ... ok (0 skipped)
. Loading the server cert. and key... ok
. Bind on tcp://*:7777/ ... ok
. Setting up the SSL/TLS structure... ok
. Waiting for a remote connection ...ok
. Performing the SSL/TLS handshake... failed
! mbedtls_ssl_handshake returned -0x7900
Last error was: -30976 - SSL - Processing of the ClientHello handshake
message failed
. Waiting for a remote connection ... ok
. Performing the SSL/TLS handshake... failed
! mbedtls_ssl_handshake returned -0x7900
Last error was: -30976 - SSL - Processing of the ClientHello handshake
message failed
. Waiting for a remote connection ... ok
. Performing the SSL/TLS handshake... failed
! mbedtls_ssl_handshake returned -0x7900
Last error was: -30976 - SSL - Processing of the ClientHello handshake
message failed
Regards
Mahesh
Hi,
We are pleased to announce the release of Mbed TLS 2.16.12, 2.28.0 and 3.1.0.
These releases of Mbed TLS address several security issues, provide bug fixes, and new features, including initial support for TLS 1.3 in Mbed TLS 3.1.0.
Full details are available in the release notes (https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0, https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0, https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.12).
Mbed TLS 2.16.12 will be the last release in the 2.16 LTS; it will no longer be supported.
Mbed TLS 2.28 is the new long-term support release, and will be supported with bug-fixes and security fixes until end of 2024.
We recommend all users to consider whether they are impacted, and to upgrade appropriately.
Dave Rodgman
Hi,
On Monday at 10am UK time, we will hold the Mbed TLS Tech Forum. This is an open forum conference call for anyone to participate; please reply here if there are any agenda topics you would like to raise.
Zoom details are in the TF calendar: https://www.trustedfirmware.org/meetings/mbed-tls-technical-forum/ or see below
Dave
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Hi,
Mbed TLS 2.16 LTS is approaching the end of its support period – it was originally announced that it would be maintained for at least 3 years up until the end of 2021 – and currently there is no other LTS branch.
To ensure that there is no period of time without a supported LTS branch, we plan to release 2.28 LTS in the near future (which will have the usual 3 year support period). We will continue supporting 2.16 LTS until this is available. The expectation is that as 2.28 will be API-compatible with 2.16, users of 2.16 LTS will be able to upgrade to 2.28 very easily.
Progress towards 2.28 LTS can be followed here: https://github.com/orgs/ARMmbed/projects/18#column-15836286
Dave Rodgman
Hi,
On Monday 8th we will have the next Mbed TLS Tech Forum. Please reply to the list if you have any agenda topics to raise.
As a starter for the agenda, we will likely discuss: https://github.com/ARMmbed/mbedtls/pull/5067 Proposal for driver dispatch code gen
Dave Rodgman
Zoom details below. The call will be recorded and made available on the TF website : https://www.trustedfirmware.org/meetings/
Join Zoom Meeting
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Meeting ID: 999 4846 2765
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Hi,
I would like to announce the Mbed TLS Tech Forum, a regular engineering call to discuss topics of interest to the Mbed TLS community.
The call is currently planned to take place every two weeks, alternating between US-friendly and China-friendly times (16:30 and 10:00 UK time), starting on the 25th October at 16:30 BST.
Please reply to the list if you have any agenda topics to raise. As a starting point, we will cover:
Format – check if times & cadence are suitable
TLS 1.3 – high-level update on progress & direction
PSA Cryptoprocessor Driver Interface – code generation for driver dispatch as per https://github.com/ARMmbed/mbedtls/pull/5067
Zoom details below. The call will be recorded and made available on the TF website: https://www.trustedfirmware.org/meetings/
Dave Rodgman
Mbed TLS tech lead
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Hi,
Today we are switching our branches around, so that the development branch focuses on Mbed TLS 3.0, to be released mid-year. This will include API-breaking changes.
2.x development work will continue on the development_2.x branch. After merging development_3.0 onto development, the development_3.0 branch will be removed.
There is no change to the process for submitting PRs: new PRs should continue to target development, with backports to 2.x and 2.16 as needed. (The exception would be a bug-fix that only affects older branches, which would only need ports to the affected branches and not to development).
As part of the 3.0 work, we are looking at various things that can be removed from the library. For some of these, we’ve notified the mailing list – please let us know in the next week if you have a good reason for retaining the feature in question.
- Remove support for TLS 1.0, TLS 1.1 and DTLS 1.0 https://github.com/ARMmbed/mbedtls/issues/4286
- Remove support for the "Truncated HMAC" (D)TLS extension https://github.com/ARMmbed/mbedtls/issues/4341
- Remove support for 3DES ciphersuites in (D)TLS https://github.com/ARMmbed/mbedtls/issues/4367
- Remove support for RC4, Blowfish, XTEA, MD2 and MD4 https://github.com/ARMmbed/mbedtls/issues/4084
- Remove support for pre-v3 X.509 certificates with extensions https://github.com/ARMmbed/mbedtls/issues/4386
- Remove the RSA key mutex https://github.com/ARMmbed/mbedtls/issues/4124
- Remove MBEDTLS_CHECK_PARAMS https://github.com/ARMmbed/mbedtls/issues/4313
- 3.0 and 2.x :- Minimum development environment: is it OK to require Python >= 3.6 and/or CMake >= 3.5.2? https://lists.trustedfirmware.org/pipermail/mbed-tls/2021-March/000319.html
Dave Rodgman
Hello Mbed TLS users,
As previously announced, we are going to switch the focus of Mbed TLS development onto the upcoming 3.0 release.
* We have created the development_2.x branch, currently aligned with the tip of development
* For the next two weeks, we will keep development and development_2.x in sync (daily)
* On April 22, we will merge development_3.0 into development, and remove development_3.0
This means that after April 22:
* development will contain API-breaking changes
* new features will not normally be back-ported to development_2.x (unless there is a compelling reason to do so)
* relevant bugfixes will be backported as normal
Impact for users:
* users of development should consider whether they should switch to using development_2.x
* authors of PRs requiring backports may require an additional backport to development_2.x
Regards
Dave Rodgman
