Mbed TLS version 2.24.0, 2.16.8 and 2.7.17 have been released recently. Version 2.7.17 is incorrectly marked as the latest release by github. Since this happens automatically based on the commit creation dates, this can’t be fixed until the next release.
We have extended the release notes of 2.7.17 to warn about this and changed the download links on the website.
We would like to confirm that version 2.24.0 is the latest release and the other two are the patch releases for the 2.16 and 2.7 long term support branches.
My apologies for the inconvenience and thank you for your support!
Best regards,
Janos
(On behalf of the Mbed TLS team)
--
Mbed-tls-announce mailing list
Mbed-tls-announce(a)lists.trustedfirmware.org
https://lists.trustedfirmware.org/mailman/listinfo/mbed-tls-announce
Hello,
4096 bytes is a lot larger than a typical public key. 4096 *bits* is
common for an RSA key. Are you sure you're using the correct units?
By default the library doesn't support the creation of MPI that are
larger than 1024 bytes. This is a configuration option
(MBEDTLS_MPI_MAX_SIZE), although it's uncommon to change it (a larger
value is hardly ever necessary, and a smaller value won't save memory
except in RSA which needs at least 512 bytes for 4096-bit keys). However
mbedtls_mpi_write_file itself doesn't have any size limit.
Best regards,
--
Gilles Peskine
Mbed TLS developer
On 27/08/2020 13:27, youssouf sokhona via mbed-tls wrote:
>
> Hello everyone, I think you are fine during this crisis.
>
>
>
> I am working now with mbedtls modulee, and I wanted to print a
> function « mbedtls_mpi_write_file » to print the value of an MPI. This
> function works with common values.
>
>
>
> However, when I want to print an MPI which is very long (about 4096
> bytes, a public key), it doesn’t work. Someone knows how to solve this
> problem ?
>
>
>
> Thanks a lot
>
>
>
> Best regards, YS
>
>
>
>
Hello everyone, I think you are fine during this crisis.
I am working now with mbedtls modulee, and I wanted to print a function « mbedtls_mpi_write_file » to print the value of an MPI. This function works with common values.
However, when I want to print an MPI which is very long (about 4096 bytes, a public key), it doesn’t work. Someone knows how to solve this problem ?
Thanks a lot
Best regards, YS
Hi Youssouf,
I think you're looking for mbedtls_mpi_write_file() - just pass NULL as the file argument to write to stdout. You can use the radix argument to print out hex or decimal.
Regards,
Manuel.
________________________________
From: mbed-tls <mbed-tls-bounces(a)lists.trustedfirmware.org> on behalf of youssouf sokhona via mbed-tls <mbed-tls(a)lists.trustedfirmware.org>
Sent: 25 August 2020 15:40
To: mbed-tls(a)lists.trustedfirmware.org <mbed-tls(a)lists.trustedfirmware.org>
Subject: [mbed-tls] Set an MPI and print it
Hi everyone, I think you all are fine.
I am a beginner on mbedtls, and I wanted to set a dhm context. So, at first, I just want to set the value of the prime P, and the generator G. So to that I wrote the function below : [cid:image001.png@01D67AF5.D43FDE60]
To check if it is correctly set, I wanted to print it to see. However, it is not the case. Do you know how to set and print the value ?
Thanks, and have a good day
Best regards, YS
Hi everyone, I think you all are fine.
I am a beginner on mbedtls, and I wanted to set a dhm context. So, at first, I just want to set the value of the prime P, and the generator G. So to that I wrote the function below : [cid:image001.png@01D67AF5.D43FDE60]
To check if it is correctly set, I wanted to print it to see. However, it is not the case. Do you know how to set and print the value ?
Thanks, and have a good day
Best regards, YS
Hello everybody, I hope you are going well
I am creating a diffie Hellman key exchange program, so I am using functions like « mbedtls_dhm_init() » or « mbedtls_ctr_drbg_init() « for example. However, even if I defined the CTR_DRBG & the DHM_C module in the config.h file, and the header in my C file, I Always have error like that :
[cid:image002.png@01D6770C.20370D40]
Can someone help me to find out where does it come from ? Because I don’t know at all.
Thanks, and have a good day
Hi all,
I am placing into review a patch (
https://github.com/ARMmbed/mbedtls/pull/3579) which replaces some
invalid size printf format specifiers, mostly for size_t. This patch
utilises %zu and %hhu, both of which were only introduced in C99, which
I know caused some issues with compiler compatibility at the time. The
problem with printf and size_t as most will know, is that its a
different size in 32 bit and 64 bit, which is what %z was introduced to
safely fix.
My question is to whether there is anyone on the list that is using a
compiler that might not handle these specifiers, for whom this patch
would presumably be something of an issue. I am admittedly hoping this
is not the case, given the age of the spec, but thought it best to ask.
Thanks in advance,
Paul.
Hi Murat
What you request may be possible with invasive changes but it is not a design goal for the PSA Cryptography API implementation in Mbed TLS to be completely replaced with an alternative implementation, while allowing re-use of the Mbed TLS build system and tests.
The focus instead is to develop and implement a PSA Cryptoprocessor Driver Interface, which will allow drivers for custom secure environments to be plugged into the core PSA Cryptography API implementation in Mbed TLS. An early version of the specification of that interface can be found here:
https://github.com/ARMmbed/mbedtls/blob/development/docs/proposed/psa-drive…
That specification and its implementation is under active development. Let us know if you would like to get involved.
Regards
Dan.
From: mbed-tls <mbed-tls-bounces(a)lists.trustedfirmware.org> On Behalf Of Murat Cakmak via mbed-tls
Sent: 14 August 2020 13:34
To: mbed-tls(a)lists.trustedfirmware.org
Subject: [mbed-tls] Custom PSA API Implementation for mbedTLS tests
Hi all,
We have implemented the PSA Functional API for a custom secure environment which passes PSA Arch tests.
Now we would like to run mbedtls tests (make check) on the PSA API if possible.
When we run "make check", it includes and compiles library/psa_crypto.c file for mbedTLS's PSA API Implementation.
Herein, we would like to compile our own psa_crypto.c implementation, does mbedtls build system allow us to include custom PSA API Implementation to run tests?
Thank you.
Murat
Greetings,
I am new to the list, please do excuse me, in case of any list
specific etiquette issues.
Trying to use a 1.6.1 release with a Cortex M7 port, specifically a STM32H7.
After enabling MBEDTLS_ENTROPY_HARDWARE_ALT, did implement
mbedtls_hardware_poll()
It looks thus, and it does appear to work from a hardware perspective:
/**
* mbedtls_hardware_poll()
* Read random data from the Hardware RNG for entropy applications
*/
int mbedtls_hardware_poll(void *arg,
unsigned char *ent_buf,
size_t count,
size_t *ent_len)
{
register uint8_t i = 0;
uint32_t rand;
if (!LL_RNG_IsEnabled(RNG))
LL_RNG_Enable(RNG); /* Enable Random Number Generator */
for (i = 0; i < count; i++) {
while (!LL_RNG_IsActiveFlag_DRDY(RNG)) { } /* Wait for DRDY
flag to be raised */
if ((LL_RNG_IsActiveFlag_CECS(RNG)) ||
(LL_RNG_IsActiveFlag_SECS(RNG))) { /* Check error, if any */
/* Clock or Seed Error detected. Set Error */
printf(" (%d) %s: Clock/Seed Error!\r\n", __LINE__, __FUNCTION__);
}
rand = LL_RNG_ReadRandData32(RNG); /* Read RNG data */
memcpy(&(ent_buf[i * 4]), &rand, 4); /* *ent_len += 4 */
}
LL_RNG_Disable(RNG); /* Stop random numbers generation */
*ent_len = ((i + 1) * 4);
printf(" (%d) %s: Random Words: %d Word: %04d\r\n",
__LINE__,
__FUNCTION__,
count,
rand);
return 0;
}
The code which causes the problem is this, in my tls_init()
int tls_init(void)
{
int ret;
/* inspired by https://tls.mbed.org/kb/how-to/mbedtls-tutorial */
const char *pers = "SYS-LWH7";
printf(" (%d) %s: Initializing\r\n", __LINE__, __FUNCTION__);
/* initialize descriptors */
mbedtls_ssl_init(&ssl);
printf(" (%d) %s: SSL initialize\r\n", __LINE__, __FUNCTION__);
mbedtls_ssl_config_init(&conf);
printf(" (%d) %s: SSL Config initialized\r\n", __LINE__, __FUNCTION__);
mbedtls_x509_crt_init(&cacert);
printf(" (%d) %s: x509 CRT initialized\r\n", __LINE__, __FUNCTION__);
mbedtls_ctr_drbg_init(&ctr_drbg);
printf(" (%d) %s: DRBG initialized\r\n", __LINE__, __FUNCTION__);
mbedtls_entropy_init(&entropy);
printf(" (%d) %s: Entropy initialized\r\n", __LINE__, __FUNCTION__);
ret = mbedtls_ctr_drbg_seed(&ctr_drbg,
mbedtls_entropy_func,
&entropy,
(const unsigned char *) pers,
strlen(pers));
if (ret) {
LWIP_DEBUGF(MQTT_APP_DEBUG_TRACE,
("failed !\n mbedtls_ctr_drbg_seed returned %d\n",
ret));
printf(" (%d) %s: DRBG seed failed, ret=%d\r\n", __LINE__,
__FUNCTION__, ret);
return -1;
}
printf(" (%d) %s: DRBG seed returned:%d\r\n", __LINE__, __FUNCTION__, ret);
/**
* The transport type determines if we are using
* TLS (MBEDTLS_SSL_TRANSPORT_STREAM) or
* DTLS (MBEDTLS_SSL_TRANSPORT_DATAGRAM).
*/
ret = mbedtls_ssl_config_defaults(&conf,
MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT);
if (ret) {
LWIP_DEBUGF(MQTT_APP_DEBUG_TRACE,
("failed !\n mbedtls_ssl_config_defaults returned %d\n\n",
ret));
printf("(%d) %s: SSL config defaults failed, ret=%d\r\n",
__LINE__, __FUNCTION__, ret);
return -1;
}
printf("(%d) %s: SSL config defaults returned:%d\r\n", __LINE__,
__FUNCTION__, ret);
ret = mbedtls_x509_crt_parse(&cacert,
(const unsigned char *)test_ca_crt,
test_ca_crt_len);
if (ret)
printf(" (%d) %s: failed!\n mbedtls_x509_crt_parse returned
%d\r\n", __LINE__, __FUNCTION__, ret);
else
printf(" (%d) %s: mbedtls_x509_crt_parse returned %d\r\n",
__LINE__, __FUNCTION__, ret);
mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL);
mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_REQUIRED);
/**
* The library needs to know which random engine
* to use and which debug function to use as callback.
*/
mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
mbedtls_ssl_setup(&ssl, &conf);
}
The output of which looks thus, in a serial terminal:
(1217) print_dhcp_state: Try connect to Broker
(174) tls_init: Initializing
(178) tls_init: SSL initialize
(181) tls_init: SSL Config initialized
(184) tls_init: x509 CRT initialized
(187) tls_init: DRBG initialized
(190) tls_init: Entropy initialized
(1027) mbedtls_hardware_poll: Random Words: 128 Word: -558876895
Any thoughts/ideas, what could be wrong ?
Any kind soul in here ?
Thanks,
Manu
Hi Simon,
Indeed while the migration is underway things can be a bit confusing, so let me try to clarify:
* releases can be found at: https://github.com/ARMmbed/mbedtls/releases - near the top you'll alwys find the latest development release followed by the latest LTS releases. At this point it is unclear if releases are going to stay on github or if they would move to trustedfrimware.org in the future, but if anything changes, we'll announce it.
* announcements about new releases and other important project events are made on the new Mbed-tls-announce mailing-list: https://github.com/ARMmbed/mbedtls/releases - if you're already subscribed to mbed-tls (this list), you don't need to subscribe to the "announce" mailing list in addition, as any post to "announce" is automatically cross-posted here ("announce" is for people who want a lower volume list).
* I don't think we're currently making announcements about upcoming releases, but I know we considered that. Unfortunately I don't remember the details and the colleague who was working on improving our release process is on leave now. But it we start making such announcements, they'll be on the "announce" list.
* We're currently planning 2.16.8 early in September.
* If you have a large number of products deployed that depend on Mbed TLS (or indeed any other tf.org project) and would like to be notified in advance of upcoming security fixes, please see the following pages: https://developer.trustedfirmware.org/w/mbed-tls/security-center/https://developer.trustedfirmware.org/w/collaboration/security_center/repor…https://developer.trustedfirmware.org/w/collaboration/security_center/trust…
I hope this answers your questions, and feel free to ask otherwise.
Manuel.
________________________________
From: mbed-tls <mbed-tls-bounces(a)lists.trustedfirmware.org> on behalf of Simon Leet via mbed-tls <mbed-tls(a)lists.trustedfirmware.org>
Sent: 14 August 2020 15:13
To: mbed-tls(a)lists.trustedfirmware.org <mbed-tls(a)lists.trustedfirmware.org>
Subject: [mbed-tls] LTS roadmap and announcement channel?
Hi folks,
I understand that https://tls.mbed.org/ has migrated under the umbrella of https://www.trustedfirmware.org/ but it’s not clear where I should turn to for information about the updates to the LTS versions. The https://tls.mbed.org/tech-updates blog used to announce LTS branch updates but seems defunct as of 2.16.7, and I can’t find equivalent information in https://developer.trustedfirmware.org/w/mbed-tls/roadmap/, https://github.com/ARMmbed/mbedtls/projects/2 or the generic https://www.trustedfirmware.org/blog/.
Is there a new channel for information about upcoming LTS mbedtls releases so that users can plan their appropriate upgrade cycles? E.g. when is 2.16.8 roughly expected to be released? Is the new model for monitoring release announcements reliably going to be as a new tag on https://github.com/ARMmbed/mbedtls/tags?
-Simon
Hi everyone,
Hope you are still going well
I am now working on MbedTLS to establish a key exchange with a BGM which has a TRNG
, and I read that I have to implement myself a function called «mbedTLS_hardware_poll »
But I have no idea to know how I can implement this function zlthough I read articles on the mbedtls.com about entropy site…. Can you help me, to know how I can implement this function ?
Hi all,
We have implemented the PSA Functional API for a custom secure environment
which passes PSA Arch tests.
Now we would like to run mbedtls tests (make check) on the PSA API if
possible.
When we run "make check", it includes and compiles library/psa_crypto.c file
for mbedTLS's PSA API Implementation.
Herein, we would like to compile our own psa_crypto.c implementation, does
mbedtls build system allow us to include custom PSA API Implementation to
run tests?
Thank you.
Murat
Hello,
The interface of the Diffie-Hellman (DHM) module is modeled on the way
it's used in TLS, which is a bit different from the classical
presentation. You can find code examples in programs/pkey/dh_client.c
and programs/pkey/dh_server.c .
Elliptic-curve Diffie-Hellman (provided by the ECDH module) has similar
security properties and is significantly faster. If you don't need
interoperability with legacy software that only supports classical
(finite-field) Diffie-Hellman, you should use ECDH rather than DHM. With
the ECDH module, you can use either the same TLS-inspired interface as
the DHM module, or a more classical interface for which there is a usage
example in psa_crypto.c in the function psa_key_agreement_ecdh.
Hope this helps,
--
Gilles Peskine
Mbed TLS developer
You can find an example of the TLS-like inter
On 12/08/2020 14:02, youssouf sokhona via mbed-tls wrote:
>
> Hello, I hope you are going well during this Covid crisis.
>
>
>
> I'm sending you this message to find out how to generate a Diffie
> Hellman key using MbedTLS. Indeed, with all the documentation, I'm a
> bit lost.
>
>
>
> I think, you have to use the int mbedtls_dhm_set_group function to
> create p and g. And then, I don't know how to use which function...
> Moreover, I can't find any function that allows to set a and b,
> whereas they are 2 fundamental elements
>
> Can you help me? Thank you!
>
>
>
> Best regards, YS
>
>
>
Hello,
Short version: to use the official tools to configure Mbed TLS, or to
run the unit tests, you need Python. If we start requiring Python 3.5,
is this going to be a problem?
Detailed version:
Mbed TLS includes four Python scripts that are of interest to users,
with a fifth one in preparation:
* scripts/config.py : compile-time configuration (unless you prefer to
edit config.h directly).
* scripts/generate_psa_constants.py : to build
programs/psa/psa_constant_names (we have a pending task to commit the
result instead of requiring it during the build).
* tests/scripts/generate_test_code.py : necessary to build the unit tests.
* tests/scripts/mbedtls_test.py : does anyone use this? It's for testing
on platforms with Greentea, but some of the automation is missing.
* upcoming: a script to generate glue code for accelerator and secure
element drivers. We'll also provide a manual way, but it won't be as
convenient.
This is a question to everyone who's building Mbed TLS and using some of
these scripts: is it ok if they require Python 3.5?
Currently:
* scripts/config.py requires Python 3.5.
* scripts/generate_psa_constants.py requires Python 3.3.
* tests/scripts/generate_test_code.py still works with Python 2.7.
* tests/scripts/mbedtls_test.py still works with Python 2.7.
* the driver glue code generation script will require Python 3.5, or
Python 3.4 + typing.
Is there any demand for versions of Python before 3.5?
--
Gilles Peskine
Mbed TLS developer
Hello, I hope you are going well during this Covid crisis.
I'm sending you this message to find out how to generate a Diffie Hellman key using MbedTLS. Indeed, with all the documentation, I'm a bit lost.
I think, you have to use the int mbedtls_dhm_set_group function to create p and g. And then, I don't know how to use which function... Moreover, I can't find any function that allows to set a and b, whereas they are 2 fundamental elements
Can you help me? Thank you!
Best regards, YS
Hi Frank,
We have now updated the links both on the download-archive and releases site and now they point to https://github.com/ARMmbed/mbedtls/releases, where all the releases are available.
We also have added checksums to the release notes on github and fixed the archive structure.
Thank you very much for pointing these issues out!
Cheers,
Janos
(Mbed TLS developer)
On 04/08/2020, 19:06, "mbed-tls on behalf of Frank Bergmann via mbed-tls" <mbed-tls-bounces(a)lists.trustedfirmware.org on behalf of mbed-tls(a)lists.trustedfirmware.org> wrote:
Hi,
2.16.7 was released on github more than one month ago (2020-07-01).
But it is not listed on
- download archive at https://tls.mbed.org/download-archive
- release news at https://tls.mbed.org/tech-updates/releases
Questions about that:
- Is it an "official" release even if it is not mentioned on release news?
- When will it be available in download archive?
- If there will be no more addings to download archive because now we'll
have to use github:
* Will there be separate releases GPL/Apache available?
* Will a signed/unsigned check sum be provided?
* Will the "new structure" as provided by tarball on github be kept
in future or was it just an accident? (e.g. main dir is named
"mbedtls-mbedtls-2.16.7")
I started using mbed TLS with 2.16.6 but now I am confused. ;-)
cheers,
Frank
--
mbed-tls mailing list
mbed-tls(a)lists.trustedfirmware.org
https://lists.trustedfirmware.org/mailman/listinfo/mbed-tls
Hi Frank,
I confirm that 2.16.7 is an official release of the 2.16 long-time
support branch of Mbed TLS, alongside 2.7.16 for the 2.7 branch and
2.23.0 for the latest features. Everyone should update to one of these
versions since they fix security issues and other bugs.
We're progressively transitioning the project from Arm infrastructure to
TrustedFirmware infrastructure. Eventually we'll decommission the
existing tls.mbed.org, and we intend to distribute releases via
trustedfirmware.org. We no longer intend to reference new releases
directly on https://tls.mbed.org/download-archive . For the time being,
we're distributing via GitHub. However, it isn't right that
https://tls.mbed.org/download-archive links to
https://github.com/ARMmbed/mbedtls/releases/ which doesn't list LTS
branches. We need to link from https://tls.mbed.org/download-archive to
the place that has the latest LTS releases one way or the other.
There are no longer separate archives with Apache and GPL licenses.
These archives were always identical except for license headers. Now LTS
releases are distributed as a single archive in which the files are
dual-licensed.
The naming with mbedtls-mbedtls- must be a bug in our release script.
Thanks for noticing.
I don't think we made a conscious decision not to provide official
checksums. I can see the value of having them so let's try to
incorporate those in our new release process.
--
Gilles Peskine
Mbed TLS developer
On 04/08/2020 19:05, Frank Bergmann via mbed-tls wrote:
> Hi,
>
> 2.16.7 was released on github more than one month ago (2020-07-01).
> But it is not listed on
> - download archive at https://tls.mbed.org/download-archive
> - release news at https://tls.mbed.org/tech-updates/releases
>
> Questions about that:
> - Is it an "official" release even if it is not mentioned on release news?
> - When will it be available in download archive?
> - If there will be no more addings to download archive because now we'll
> have to use github:
> * Will there be separate releases GPL/Apache available?
> * Will a signed/unsigned check sum be provided?
> * Will the "new structure" as provided by tarball on github be kept
> in future or was it just an accident? (e.g. main dir is named
> "mbedtls-mbedtls-2.16.7")
>
> I started using mbed TLS with 2.16.6 but now I am confused. ;-)
>
> cheers,
> Frank
>
>
Hi,
2.16.7 was released on github more than one month ago (2020-07-01).
But it is not listed on
- download archive at https://tls.mbed.org/download-archive
- release news at https://tls.mbed.org/tech-updates/releases
Questions about that:
- Is it an "official" release even if it is not mentioned on release news?
- When will it be available in download archive?
- If there will be no more addings to download archive because now we'll
have to use github:
* Will there be separate releases GPL/Apache available?
* Will a signed/unsigned check sum be provided?
* Will the "new structure" as provided by tarball on github be kept
in future or was it just an accident? (e.g. main dir is named
"mbedtls-mbedtls-2.16.7")
I started using mbed TLS with 2.16.6 but now I am confused. ;-)
cheers,
Frank
Hi Youssouf,
This is Steven with Silicon Labs. It sounds like you have questions that are very device-specific, and relate to Silicon Labs products. We do provide TRNG drivers for mbed TLS through Simplicity Studio and our software SDK. Please contact our support staff at www.silabs.com/support<http://www.silabs.com/support>, and they’ll do their best to help you out with your questions.
Regards,
-- Steven
From: mbed-tls <mbed-tls-bounces(a)lists.trustedfirmware.org> on behalf of youssouf sokhona via mbed-tls <mbed-tls(a)lists.trustedfirmware.org>
Reply to: youssouf sokhona <youssouf.sokhona(a)hotmail.fr>
Date: Tuesday, 4 August 2020 at 12:59
To: "mbed-tls(a)lists.trustedfirmware.org" <mbed-tls(a)lists.trustedfirmware.org>
Subject: [mbed-tls] Entropy & TRNG on the BGM13P32
CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.
Hi, everyone,
First of all, I hope you are all healthy during this difficult time.
I am working with Simplicity Studio IDE with MbedTLS and I am currently working on a project with a BGM13P32. I plan to perform a key exchange via bluetooth with the Diffie Hellman protocol. To start my project, I need an entropy source. I read the following on the BGM13P32 documentation "The TRNG is a non-deterministic random number generator based on a full hardware solution. The TRNG is validated with NIST800-22and AIS-31 test suites as well as being suitable for FIPS 140-2 certification (for the purposes of cryptographic key generation)."
And I also read about the Random Number Generator "The Frame Controller (FRC) implements a random number generator that uses entropy gathered from noise in the RF receive chain.The data is suitable for use in cryptographic applications.Output from the random number generator can be used either directly or as a seed or entropy source for software-based random num-ber generator algorithms such as Fortuna"
Knowing this, how can we use this to create entropy and then create a sequence of random numbers? I need to implement the MbedTLS_hardware_poll() function? Do I have to add another entropy, like real timing for example
As you can see I am a bit confused actually. Can you help me out?
Thanks in advance, and take care of yourself !