Commit graph

1106 commits

Author SHA1 Message Date
Yanray Wang
076b2d062f Improve the method of printing string build version
Following changes are introduced with this commit:
- Call mbedtls_version_get_string before printing string
  build version instead of printing macro directly
- Output build version in the beginning of ssl_client2 program

Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2022-10-21 11:22:44 +08:00
Andrzej Kurek
b50754ae86 Switch from x509_CRT_PARSE to KEY_EXCHANGE_WITH_CERT_ENABLED
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
2022-10-19 08:35:09 -04:00
Andrzej Kurek
d0786f5f26 Revert one of the changes to ssl_server2 dependencies
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
2022-10-19 08:35:09 -04:00
Andrzej Kurek
6ee1e20d7f Replace x509_CRT_PARSE_C with KEY_EXCHANGE_WITH_CERT_ENABLED
SSL programs use certificates in an exchange, so it's more natural
to have such dependency instead of just certificate parsing.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
2022-10-19 08:35:09 -04:00
Andrzej Kurek
e38b788b79 Add missing key exchange dependencies
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
2022-10-19 08:35:08 -04:00
Andrzej Kurek
68327748d3 Add missing dependencies
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
2022-10-19 08:35:08 -04:00
Yanray Wang
ff4181e246 Fix build error in cmake while printing digital build version
Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2022-10-18 18:20:40 +08:00
Yanray Wang
d976673dd6 Add build version to the output of ssl_client2
Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2022-10-18 10:53:49 +08:00
Ronald Cron
49e4184812
Merge pull request #6299 from xkqian/tls13_add_servername_check
Add server name check when proposing pre-share key
2022-10-13 16:00:59 +02:00
Gilles Peskine
0fe6631486
Merge pull request #6291 from gilles-peskine-arm/platform.h-unconditional-3.2
Include platform.h unconditionally
2022-10-13 10:19:22 +02:00
Xiaokang Qian
bc663a0461 Refine code based on commnets
Change code layout
Change hostname_len type to size_t
Fix various issues

Signed-off-by: Xiaokang Qian <xiaokang.qian@arm.com>
2022-10-12 11:06:01 +00:00
Xiaokang Qian
adf84a4a8c Remove public api mbedtls_ssl_reset_hostname()
Signed-off-by: Xiaokang Qian <xiaokang.qian@arm.com>
2022-10-12 11:05:11 +00:00
Xiaokang Qian
fb8ac46add Change the name of servername when re-connect
Signed-off-by: Xiaokang Qian <xiaokang.qian@arm.com>
2022-10-12 11:03:44 +00:00
Xiaokang Qian
281fd1bdd8 Add server name check when proposeing pre-share key
Signed-off-by: Xiaokang Qian <xiaokang.qian@arm.com>
2022-10-12 11:03:41 +00:00
Gilles Peskine
8fd3254cfc
Merge pull request #6374 from mprse/enc_types
Test TLS 1.2 builds with each encryption type
2022-10-12 12:45:50 +02:00
Jerry Yu
c79742303d Remove unnecessary empty line and fix format issue
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-10-11 21:22:33 +08:00
Przemek Stekiel
d61a4d3d1a Fix missing guard and double-space
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-10-11 09:40:40 +02:00
Jerry Yu
6916e70521 fix various issues
- adjust guards. Remove duplicate guards and adjust format.
- Return success at function end. Not `ret`
- change input len

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-10-10 21:33:51 +08:00
Przemek Stekiel
68a01a6720 Fix session tickets related build flags in fuzz_server and ssl_server2
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-10-10 13:30:43 +02:00
Jerry Yu
03b8f9d299 Adjust guards for dummy_tickets
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-10-08 14:56:38 +08:00
Jerry Yu
25ab654781 Add dummy ticket support
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-10-07 10:11:05 +08:00
Manuel Pégourié-Gonnard
e3358e14b2
Merge pull request #6051 from mprse/permissions_2b_v2
Permissions 2b: TLS 1.3 sigalg selection
2022-09-28 09:50:04 +02:00
Paul Elliott
2c282c9bd0
Merge pull request #6180 from yuhaoth/pr/add-tls13-multiple-session-tickets
TLS 1.3: NewSessionTicket: Add support for sending multiple tickets per session.
2022-09-23 15:48:33 +01:00
Manuel Pégourié-Gonnard
d433cd7d07
Merge pull request #6283 from mpg/driver-only-hashes-wrap-up
Driver only hashes wrap-up
2022-09-21 08:29:46 +02:00
Ronald Cron
50969e3af5 ssl-opt.sh: TLS 1.3 opaque key: Add test with unsuitable sig alg
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-09-20 15:57:57 +02:00
Jerry Yu
7a51305478 Add multi-session tickets test
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-09-19 14:26:07 +08:00
Ronald Cron
be0224aef3
Merge pull request #6167 from yuhaoth/pr/finalize-tls13-session-tickets 2022-09-18 21:18:13 +02:00
Manuel Pégourié-Gonnard
e896705c1a Take advantage of legacy_or_psa.h being public
Opportunities for using the macros were spotted using:

    git grep -E -n -A2 'MBEDTLS_(MD|SHA)[0-9]+_C' | egrep 'PSA_WANT_ALG_(MD|SHA)'

then manually filtering the results.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
2022-09-16 12:03:52 +02:00
Gilles Peskine
945b23c46f Include platform.h unconditionally: automatic part
We used to include platform.h only when MBEDTLS_PLATFORM_C was enabled, and
to define ad hoc replacements for mbedtls_xxx functions on a case-by-case
basis when MBEDTLS_PLATFORM_C was disabled. The only reason for this
complication was to allow building individual source modules without copying
platform.h. This is not something we support or recommend anymore, so get
rid of the complication: include platform.h unconditionally.

There should be no change in behavior since just including the header should
not change the behavior of a program.

This commit replaces most occurrences of conditional inclusion of
platform.h, using the following code:

```
perl -i -0777 -pe 's!#if.*\n#include "mbedtls/platform.h"\n(#else.*\n(#define (mbedtls|MBEDTLS)_.*\n|#include <(stdarg|stddef|stdio|stdlib|string|time)\.h>\n)*)?#endif.*!#include "mbedtls/platform.h"!mg' $(git grep -l '#include "mbedtls/platform.h"')
```

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2022-09-15 20:33:07 +02:00
Przemek Stekiel
632939df4b ssl_client2: print pk key name when provided using key_opaque_algs
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-09-15 14:16:11 +02:00
Jerry Yu
4746b10c2e fix various issues
- Format issues
- Possible memory leak
- Improve naming and comment issues

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-09-13 15:37:46 +08:00
Andrzej Kurek
0bc834b27f Enable signature algorithms in ssl programs with PSA based hashes
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
2022-09-12 05:37:46 -04:00
Jerry Yu
0203534c64 Add session save after got new session ticket
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-08-31 23:24:25 +08:00
Ronald Cron
e00d6d6b55
Merge pull request #6135 from yuhaoth/pr/tls13-finalize-external-psk-negotiation
TLS 1.3: SRV: Finalize external PSK negotiation
2022-08-31 17:21:57 +02:00
Andrzej Kurek
dcce505a08 Add a missing guard in an example program
MD variable is not used in builds without MD.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
2022-08-30 17:56:08 -04:00
Jerry Yu
c5a23a0f12 fix various issues
- code style
- variable initialize
- update comments


Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-08-25 11:09:35 +08:00
Andrzej Kurek
cccb044804 Style & formatting fixes
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
2022-08-23 05:26:02 -04:00
Andrzej Kurek
8c95ac4500 Add missing dependencies / alternatives
A number of places lacked the necessary dependencies on one of
the used features: MD, key exchange with certificate, 
entropy, or ETM.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
2022-08-22 17:46:50 -04:00
Jerry Yu
5d01c05d93 fix various issues
- wrong typo in comments
- replace psk null check with key_exchange_mode check
- set psk NULL when error return in export hs psk

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-08-21 12:55:01 +08:00
Jerry Yu
2b7a51ba8f Add psk_or_ephemeral mode and tests
psk_or_ephemeral exists in theory. This change is for
improving test coverage.

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-08-21 12:51:53 +08:00
Jan Bruckner
25fdc2addb Fix minor typos
Signed-off-by: Jan Bruckner <jan@janbruckner.de>
2022-07-26 10:52:46 +02:00
Jerry Yu
2b4f02d7fb Add new_session_ticket err handler
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-07-20 11:07:29 +08:00
Ronald Cron
ce7d76e2ee Merge remote-tracking branch 'mbedtls-restricted/development-restricted' into mbedtls-3.2.0rc0-pr 2022-07-11 10:22:37 +02:00
Paul Elliott
41aa808a56
Merge pull request #952 from gilles-peskine-arm/stdio_buffering-setbuf
Turn off stdio buffering with setbuf()
2022-07-04 10:12:22 +01:00
Ronald Cron
0e39ece23f
Merge pull request #5916 from yuhaoth/pr/tls13-refactor-get-sig-alg-from-pk
Refactor signature algorithm chooser
2022-07-04 09:10:08 +02:00
Paul Elliott
ff15dbab4c Make definition order a bit neater
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
2022-07-01 16:30:08 +01:00
Gilles Peskine
6d576c9646 Call setbuf when reading or writing files: programs
After opening a file containing sensitive data, call mbedtls_setbuf() to
disable buffering. This way, we don't expose sensitive data to a memory
disclosure vulnerability in a buffer outside our control.

This commit adds a call to mbedtls_setbuf() after each call to fopen(),
but only in sample programs that were calling mbedtls_platform_zeroize().
Don't bother protecting stdio buffers in programs where application buffers
weren't protected.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2022-06-30 17:06:11 +02:00
Jerry Yu
cc5391048e fix various issues
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-06-29 16:18:30 +08:00
Jerry Yu
202919c23d refine supported sig alg print
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-06-29 16:18:29 +08:00
Jerry Yu
64f410c246 Add tls13 sig alg parameters
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-06-29 16:16:09 +08:00
Jerry Yu
a1255e6b8c fix various issues
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-06-29 16:16:09 +08:00
Jerry Yu
9bb3ee436b Revert rsa_pss_rsae_* support for tls12
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-06-29 16:16:08 +08:00
Jerry Yu
3896ac6e5b fix ordered sig algs fail for openssl
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-06-29 16:16:06 +08:00
Jerry Yu
9f4cc5ff65 Add pss_rsae sig algs into test conf
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-06-29 16:13:41 +08:00
Glenn Strauss
bd10c4e2af Test accessors to config DN hints for cert request
Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-06-29 02:54:28 -04:00
Ronald Cron
ba65fbbe30 Fix comments
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-06-22 17:36:12 +02:00
Ronald Cron
903c979376 programs: ssl: Add one RSA PSS signature algorithm
Add one RSA PSS signature algorithm to the
test list of signature algorithms. This allows
certificate chains exposing an RSA key with
signatures using SHA-1 to be used in tests
where an TLS 1.3 handshake is performed.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-06-17 08:45:30 +02:00
XiaokangQian
d5d5b60c07 Add comprehensive test cases for TLS1.3 server side
Change-Id: I544cb12b3ffe5edd7d59fa54342ca7db5b5c8a2a
Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
2022-05-31 02:51:26 +00:00
bootstrap-prime
6dbbf44d78
Fix typos in documentation and constants with typo finding tool
Signed-off-by: bootstrap-prime <bootstrap.prime@gmail.com>
2022-05-18 14:15:33 -04:00
Manuel Pégourié-Gonnard
9bc53a2e84
Merge pull request #5806 from josesimoes/fix-3031
Remove prompt to exit in all programs
2022-05-12 10:50:31 +02:00
Shaun Case
8b0ecbccf4 Redo of PR#5345. Fixed spelling and typographical errors found by CodeSpell.
Signed-off-by: Shaun Case <warmsocks@gmail.com>
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
2022-05-11 21:25:51 +01:00
josesimoes
23419560c9 Remove prompt to exit in all programs
Signed-off-by: José Simões <jose.simoes@eclo.solutions>
2022-05-06 17:11:22 +01:00
Przemek Stekiel
cb20d202d2 Further code optimization
- key_opaque_set_alg_usage(): set alg/usage in loop
- key_opaque_set_alg_usage(): add key paramteter to set default alg/usage if it is not specified by command line parameters
- unify default alg/usage for client and server
- optimize opaque code on client and server side

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-06 09:34:30 +02:00
Przemek Stekiel
296bfba924 ssl_server2: add key_opaque_algs2 usage info
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 11:08:34 +02:00
Przemek Stekiel
1d25e076f3 ssl_client2: fix default key opaque algs
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 11:05:10 +02:00
Przemek Stekiel
488efa05b6 Fix compiler warnings: initialize local variables: psa_alg, psa_alg2, psa_usage
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
134eb8b6e2 Fix style
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
092128324f ssl_client2/ss_server2: optimize code for opaque key
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
76a41f5a52 ssl_test_lib: fix compilation flags for default config
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
e5e9ba920f ssl_server2: refactor opaque code
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
89132a6ab0 Fix call to mbedtls_pk_wrap_as_opaque(): use usage variable instead PSA_KEY_USAGE_SIGN_HASH
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
b58c47a666 ssl_server2: use key opaque algs given from command line
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
344c561292 ssl_server2: Add support for key_opaque_algs2 command line paramtere
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
a17b5c6ba2 ssl_client: use key opaque algs given from command line
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
01396a16da ssl_test_lib: add function translate given opaque algoritms to psa
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
77fc9ab1ba Fix typos and code style
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
4ca0d72c3b ssl server: add key_opaque_algs command line option
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
f1822febc4 ssl client: add key_opaque_algs command line option
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Przemek Stekiel
85d692d1c4 ssl client/server: add parsing function for key_opaque_algs command line option
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-05-05 10:17:01 +02:00
Manuel Pégourié-Gonnard
068a13d909
Merge pull request #5771 from superna9999/5761-rsa-decrypt-rework-pk-wrap-as-opaque
RSA decrypt 0: Rework `mbedtls_pk_wrap_as_opaque()`
2022-05-02 09:06:49 +02:00
Neil Armstrong
94e371af91 Update mbedtls_pk_wrap_as_opaque() usage in SSL client2 & server2
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-04-28 13:27:59 +02:00
Przemek Stekiel
cb322eac6b Enable support for psa opaque DHE-PSK key exchange on the server side
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-04-22 14:54:33 +02:00
Przemek Stekiel
b293aaa61b Enable support for psa opaque DHE-PSK key exchange on the client side
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-04-22 14:54:33 +02:00
Przemek Stekiel
14d11b0877 Enable support for psa opaque ECDHE-PSK key exchange on the server side
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-04-22 14:53:55 +02:00
Przemek Stekiel
19b80f8151 Enable support for psa opaque ECDHE-PSK key exchange on the client side
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-04-22 14:52:28 +02:00
Przemek Stekiel
aeb710fec5 Enable support for psa opaque RSA-PSK key exchange on the server side
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-04-22 14:52:28 +02:00
Przemek Stekiel
fc72e428ed ssl_client2: Enable support for TLS 1.2 RSA-PSK opaque ciphersuite
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
2022-04-22 14:52:27 +02:00
Ronald Cron
38b8aa4f63
Merge pull request #5539 from xkqian/add_client_hello_to_server
Add client hello into server side
2022-04-22 10:26:00 +02:00
Manuel Pégourié-Gonnard
21f82c7510
Merge pull request #5709 from superna9999/5625-pk-opaque-rsa-tls12
RSA sign 3b: TLS 1.2 integration testing
2022-04-22 10:05:43 +02:00
Gilles Peskine
afbfed9397
Merge pull request #5582 from gilles-peskine-arm/ssl-opt-auto-psk
Run ssl-opt.sh in more reduced configurations
2022-04-21 12:03:53 +02:00
XiaokangQian
318dc763a6 Fix test failure issue and update code styles
Change-Id: I0b08da1b083abdb19dc383e6f4b210f66659c109
Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
2022-04-20 09:43:51 +00:00
Glenn Strauss
e3af4cb72a mbedtls_ssl_(read|write)_version using tls_version
remove use of MBEDTLS_SSL_MINOR_VERSION_*
remove use of MBEDTLS_SSL_MAJOR_VERSION_*
(only remaining use is in tests/suites/test_suite_ssl.data)

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-04-14 15:40:14 -04:00
Glenn Strauss
60bfe60d0f mbedtls_ssl_ciphersuite_t min_tls_version,max_tls_version
Store the TLS version in tls_version instead of major, minor version num

Note: existing application use which accesses the struct member
(using MBEDTLS_PRIVATE) is not compatible, as the struct is now smaller.

Reduce size of mbedtls_ssl_ciphersuite_t

members are defined using integral types instead of enums in
order to pack structure and reduce memory usage by internal
ciphersuite_definitions[]

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-04-14 15:40:12 -04:00
Neil Armstrong
f0b1271a42 Support RSA Opaque PK keys in ssl_server2
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-04-13 10:49:25 +02:00
Gilles Peskine
99a732bf0c Fix off-by-one in buffer_size usage
The added null byte was accounted for twice, once by taking
opt.buffer_size+1 when allocating the buffer and once by taking opt.buffer-1
when filling the buffer. Make opt.buffer_size the size that is actually
read, it's less confusing that way.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2022-04-06 23:34:36 +02:00
Gilles Peskine
8bb96d96cd Fix buffer size calculation
Make sure that buf always has enough room for what it will contain. Before,
this was not the case if the buffer was smaller than the default response,
leading to memory corruption in ssl_server2.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2022-04-06 23:31:05 +02:00
Jerry Yu
79c004148d Add PSA && TLS1_3 check_config
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-03-22 15:13:34 +08:00
Jerry Yu
3a58b462b6 add pss_rsae_sha{384,512}
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-03-22 15:13:34 +08:00
Dave Rodgman
2cecd8aaad
Merge pull request #3624 from daxtens/timeless
RFC: Fix builds with MBEDTLS_HAVE_TIME disabled and test
2022-03-15 16:43:19 +00:00
Manuel Pégourié-Gonnard
10e5cdbbbf
Merge pull request #5454 from gstrauss/cert_cb-user_data
server certificate selection callback
2022-03-10 11:51:42 +01:00