Commit graph

2638 commits

Author SHA1 Message Date
Yanray Wang
690ee81533 Merge remote-tracking branch 'origin/development' into support_cipher_encrypt_only 2023-11-23 10:31:26 +08:00
Gilles Peskine
7a715c4537 Fix the build with gcc-12 -Wuse-after-free
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-21 13:42:40 +01:00
Jerry Yu
713ce1f889 various improvement
- improve change log entry
- improve comments
- remove unnecessary statement
- change type of client_age

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2023-11-21 09:59:25 +08:00
Jerry Yu
cf9135100e fix various issues
- fix CI failure due to wrong usage of ticket_lifetime
- Improve document and comments

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2023-11-21 09:58:19 +08:00
Jerry Yu
25ba4d40ef rename ticket_creation to ticket_creation_time
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2023-11-21 09:58:19 +08:00
Jerry Yu
3ff0b1fda3 Cleanup ticket negative tests.
- improve comments
- case 3/4 is for server age check.
- case 5/6 is for client age check

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2023-11-21 09:58:18 +08:00
Jerry Yu
ec6d07870d Replace start with ticket_creation
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2023-11-21 09:58:18 +08:00
Jerry Yu
f16efbc78d fix various issues
- Add comments for ticket test hooks
- improve code style.

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2023-11-21 09:58:18 +08:00
Jerry Yu
cebffc3446 change time unit of ticket to milliseconds
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2023-11-21 09:58:18 +08:00
Gilles Peskine
6267dd59c8
Merge pull request #8463 from gilles-peskine-arm/metatest-create
Create a metatest program
2023-11-20 14:07:08 +00:00
Thomas Daubney
dd2a09a22b Introduce demo script for PSA hash program
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
2023-11-16 18:45:55 +00:00
Matthias Schulz
70595f7983 Explicitly indicating when private fields are accessed in benchmark.c.
Signed-off-by: Matthias Schulz <mschulz@hilscher.com>
2023-11-16 17:43:58 +01:00
Matthias Schulz
3b9240bbd0 Alternative Timing compatible benchmark.c
Signed-off-by: Matthias Schulz <mschulz@hilscher.com>
2023-11-16 17:39:43 +01:00
Matthias Schulz
aa7dffa24a Add benchmark for RSA 3072.
Signed-off-by: Matthias Schulz <mschulz@hilscher.com>
2023-11-16 15:31:32 +01:00
Gilles Peskine
2f40cc05f0 Improve explanations of what bad thing a metatest does
Especially clarify the situation with respect to mutex usage.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-16 15:13:38 +01:00
Gilles Peskine
ad2a17eb60 Uniformly use MBEDTLS_THREADING_C guards
Since the code compiles with MBEDTLS_THREADING_C, not just with
MBEDTLS_THREADING_PTHREAD, use MBEDTLS_THREADING_C as the guard. The runtime
behavior is only as desired under certain conditions that imply
MBEDTLS_THREADING_PTHREAD, but that's fine: no metatest is expected to pass
in all scenarios, only under specific build- and run-time conditions.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-16 15:09:48 +01:00
Manuel Pégourié-Gonnard
752dd39a69
Merge pull request #8508 from valeriosetti/issue6323
[G3] Driver-only cipher+aead: TLS: ssl-opt.sh
2023-11-14 11:39:06 +00:00
Gilles Peskine
cce0012463 Add documentation
Explain the goals of metatests, how to write them, and how to read their
output.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-10 15:36:15 +01:00
Gilles Peskine
ccb121500d Uninitialized read: make the pointer non-volatile rather than the buffer
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-10 11:35:36 +01:00
Gilles Peskine
da6e7a2ac2 More consistent usage of volatile
Fix MSVC warning C4090.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-10 10:09:27 +01:00
Valerio Setti
38e75fb1a7 ssl_server2: remove usage of mbedtls_cipher_info_from_string()
This removes the dependency from cipher module and legacy key/modes
symbols which are used in cipher_wrap.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
2023-11-10 08:27:39 +01:00
Gilles Peskine
d2fa698155 Strengthen against possible compiler optimizations
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-09 21:46:24 +01:00
Yanray Wang
0751761b49 max_early_data_size: rename configuration function
Rename mbedtls_ssl_tls13_conf_max_early_data_size as
mbedtls_ssl_conf_max_early_data_size since in the future
this may not be specific to TLS 1.3.

Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2023-11-07 11:49:34 +08:00
Yanray Wang
d5ed36ff24 early data: rename configuration function
Rename mbedtls_ssl_tls13_conf_early_data as
mbedtls_ssl_conf_early_data since in the future this may not be
specific to TLS 1.3.

Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2023-11-07 11:49:24 +08:00
Gilles Peskine
a1023e2bd6 programs/test/metatest indirectly includes library/common.h
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:19 +01:00
Gilles Peskine
4bc873f0a1 Add missing program to .gitignore
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:19 +01:00
Gilles Peskine
102aea2ba8 Add metatests for mutex usage
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:19 +01:00
Gilles Peskine
f0d5cf9a0c Don't use %llx in printf
We still do MinGW builds on our CI whose printf doesn't support it!

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:19 +01:00
Gilles Peskine
a1dfa14c06 Fix cast from pointer to integer of different size
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:19 +01:00
Gilles Peskine
ee8109541a Don't cast a function pointer to a data pointer
That's nonstandard. Instead, convert to an integer.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:19 +01:00
Gilles Peskine
6aa9f32124 Use casts when doing nonstandard pointer conversions
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:19 +01:00
Gilles Peskine
69e8db0366 Strengthen against Clang optimizations
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:19 +01:00
Gilles Peskine
b0f0a64de0 Metatests for basic Asan and Msan features
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:19 +01:00
Gilles Peskine
80ba832be6 Metatests for null pointer dereference
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:09 +01:00
Gilles Peskine
f309fbf0d5 Validate that test_fail causes a test failure
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:09 +01:00
Gilles Peskine
33406b645d Add a metatest program
This program can be used to validate that things that should be detected as
test failures are indeed caught, either by setting the test result to
MBEDTLS_TEST_RESULT_FAILED or by aborting the program.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-11-06 20:33:09 +01:00
Yanray Wang
f24bbd987a dh_client.c: modify prompt message
Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2023-11-06 10:02:10 +08:00
Gilles Peskine
8b6b41f6cd
Merge pull request #8434 from valeriosetti/issue8407
[G2] Make TLS work without Cipher
2023-11-04 15:05:00 +00:00
Dave Rodgman
f8be5f6ade Fix overlooked files
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
2023-11-02 20:43:00 +00:00
Dave Rodgman
16799db69a update headers
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
2023-11-02 19:47:20 +00:00
Valerio Setti
74d48c89fa ssl_server2: small improvement of code readability
Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
2023-11-02 16:43:55 +01:00
Yanray Wang
b67b47425e Rename MBEDTLS_CIPHER_ENCRYPT_ONLY as MBEDTLS_BLOCK_CIPHER_NO_DECRYPT
Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2023-10-31 17:22:06 +08:00
Paul Elliott
afc6a992c5
Merge pull request #8381 from gilles-peskine-arm/20231017-misc-cleanup
Cleanups in test code
2023-10-30 18:08:01 +00:00
Valerio Setti
dc55470341 ssl_context_info: add guards for CIPHER_C
mbedtls_cipher_info_from_type() is only available when CIPHER_C is
defined. So when it is not we just print the cipher type decimal
value on the output instead of the cipher's name.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
2023-10-30 11:36:32 +01:00
Valerio Setti
bdf04e840a ssl_server2: support ticket_aead only when CIPHER_C is defined
Cipher parsing requires mbedtls_cipher_info_from_string() which
depends on CIPHER_C.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
2023-10-30 11:36:32 +01:00
Gilles Peskine
5d055f8206
Merge pull request #7844 from mpg/ssl-progs-usage
Fix usage & error reporting in SSL programs
2023-10-26 08:19:25 +00:00
Gilles Peskine
0ea1b8fe8c
Merge pull request #7982 from gilles-peskine-arm/sample_program_demo_scripts-3.4
Run sample program demo scripts in all.sh
2023-10-18 10:03:52 +00:00
Gilles Peskine
62418dd20b
Merge pull request #8350 from waleed-elmelegy-arm/fix-null-dereference-in-x509-cert-write
Fix possible NULL dereference issue in X509 cert_write program
2023-10-18 10:03:36 +00:00
Paul Elliott
d44ee9e6d1
Merge pull request #8351 from waleed-elmelegy-arm/fix-null-dereference-in-x509-cert-req
Fix possible NULL dereference issue in X509 cert_req program
2023-10-18 09:01:31 +00:00
Gilles Peskine
a0e810de4b Convey that it's ok for mbedtls_ssl_session_save to fail
mbedtls_ssl_session_save() always outputs the output length, even on error.
Here, we're only calling it to get the needed output length, so it's ok to
ignore the return value. Convey this to linters.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-10-17 16:04:27 +02:00
David Horstmann
9534dfd15b Reword error message on format of SAN arguments
Signed-off-by: David Horstmann <david.horstmann@arm.com>
2023-10-17 14:59:31 +01:00
David Horstmann
4a493b267f Reword error message on format of SAN arguments
Signed-off-by: David Horstmann <david.horstmann@arm.com>
2023-10-17 14:57:23 +01:00
Yanray Wang
aa01ee303a Merge remote-tracking branch 'origin/development' into support_cipher_encrypt_only 2023-10-16 17:38:32 +08:00
Gilles Peskine
28b56335bb
Merge pull request #7942 from tom-daubney-arm/psa_crypto_example_hash
Add example program for PSA hash
2023-10-13 15:22:58 +00:00
Waleed Elmelegy
5867465e90 Fix code style issue in cert_write program
Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
2023-10-13 10:03:12 +01:00
Waleed Elmelegy
eade3fedb2 Fix code style issue in cert_req program
Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
2023-10-13 09:59:19 +01:00
Waleed Elmelegy
ac97af223e Fix possible NULL dereference issue in X509 cert_req program
Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
2023-10-12 15:46:06 +01:00
Waleed Elmelegy
1444c0eb20 Add changelog entry for x509 cert_write null dereference fix
Also fix a typo in cert_write.c

Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
2023-10-12 14:31:06 +01:00
Waleed Elmelegy
476c1198e8 Fix possible NULL dereference issue in X509 cert_write program
Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
2023-10-12 14:19:25 +01:00
Thomas Daubney
2e67781e93 Alter program layout for better clarity
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
2023-10-12 10:46:43 +01:00
Thomas Daubney
a21c972941 Remove extra blank line
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
2023-10-11 17:17:32 +01:00
Thomas Daubney
d8453bb184 Remove superfluous comment
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
2023-10-11 15:29:02 +01:00
Thomas Daubney
cd79f77439 Add missing newline
Newline character was missing from end of print
statement.

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
2023-10-11 15:28:13 +01:00
Thomas Daubney
1c2378b8b1 Add variable for message length
Add variable to store message length to increase
clarity in what the program is doing.

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
2023-10-11 15:19:38 +01:00
Tom Cosgrove
3c1cdc9061
Merge pull request #8185 from yanrayw/aes_benchmark_cfb
Benchmark: add AES_CFB128 and AES_CFB8
2023-10-11 09:48:27 +00:00
Thomas Daubney
34500874ce Remove trailing white space in documentation
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
2023-10-11 10:04:54 +01:00
Thomas Daubney
760538885a Inform user when unknown hash algorithm supplied
Excplictly inform the user that their hash algorithm
selection is invalid.

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
2023-10-10 17:38:53 +01:00
Thomas Daubney
86f9795b00 Update documentation
Add further information about PSA hashing to the
comment at the beginning of the code.

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
2023-10-10 16:50:49 +01:00
Yanray Wang
5cae6e8ddd benchmark: improve code readability
Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2023-10-09 18:40:19 +08:00
Thomas Daubney
540324cd21 Correct styling of Mbed TLS in documentation
Several bits of documentation were incorrectly styling Mbed TLS
as MbedTLS.

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
2023-10-06 17:07:24 +01:00
David Horstmann
6c979856c3 Remove generated files in all cmake_as_x tests
Signed-off-by: David Horstmann <david.horstmann@arm.com>
2023-09-28 11:30:43 +01:00
Minos Galanakis
a8b02ef79b pkey-random: Removed setting mbedtls_target in libs
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
2023-09-25 14:12:22 +01:00
Minos Galanakis
7f8e8c5ae2 program-random: Updated Cmake libs variable
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
2023-09-25 14:12:22 +01:00
Minos Galanakis
ce33e7b22d pkey Cmakelists: Updated the set libs to be consistent with others.
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
2023-09-25 14:12:22 +01:00
Minos Galanakis
e13775dedb fuzzer Makefile: Added -lbcrypt linkage
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
2023-09-25 14:12:21 +01:00
Minos Galanakis
b8d6b82df4 programs: Cleaned up bcrypt linking refererences.
bcrypt is added to the cmake `libs` dependency at library\CMakeLists.txt

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
2023-09-25 14:12:21 +01:00
Simon Butcher
1c0c5d2a62 Fix for building programs with mingw
mingw build files were missing the dependency on the bcrypt library

Signed-off-by: Simon Butcher <simon.butcher@arm.com>
2023-09-25 14:12:20 +01:00
Simon Butcher
33425de128 Correct check for WIN32 in cmake files for programs
Condition was checking for Visual Studio, not use of WIN32

Signed-off-by: Simon Butcher <simon.butcher@arm.com>
2023-09-25 14:12:20 +01:00
Kevin Kane
0ec1e68548 Replace Windows APIs that are banned in Windows Store apps
CryptGenRandom and lstrlenW are not permitted in Windows Store apps,
meaning apps that use mbedTLS can't ship in the Windows Store.
Instead, use BCryptGenRandom and wcslen, respectively, which are
permitted.

Also make sure conversions between size_t, ULONG, and int are
always done safely; on a 64-bit platform, these types are different
sizes.

Also suppress macro redefinition warning for intsafe.h:

Visual Studio 2010 and earlier generates C4005 when including both
<intsafe.h> and <stdint.h> because a number of <TYPE>_MAX constants
are redefined. This is fixed in later versions of Visual Studio.
The constants are guaranteed to be the same between both files,
however, so we can safely suppress the warning when including
intsafe.h.

Signed-off-by: Kevin Kane <kkane@microsoft.com>
2023-09-25 14:12:20 +01:00
Gilles Peskine
bd50d5baec
Merge pull request #8177 from gilles-peskine-arm/generated-files-off-in-release
Generated files off in release
2023-09-18 14:11:58 +00:00
Paul Elliott
fd3360ebf4 Remove unneeded setting of ret from ssl programs
Remove coverity warnings on unused values.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
2023-09-15 17:41:25 +01:00
Dave Rodgman
da0bb9fae8
Merge pull request #8034 from gilles-peskine-arm/bump_version-doc_mainpage
Update capitalization of "Mbed" and fix bump_version.sh
2023-09-13 08:41:20 +00:00
Gilles Peskine
e820c0abc8 Update spelling "mbed TLS" to "Mbed TLS"
The official spelling of the trade mark changed from all-lowercase "mbed"
to normal proper noun capitalization "Mbed" a few years ago. We've been
using the new spelling in new text but still have the old spelling in a
lot of text. This commit updates most occurrences of "mbed TLS":

```
sed -i -e 's/mbed TLS/Mbed TLS/g' $(git ls-files ':!ChangeLog' ':!tests/data_files/**' ':!tests/suites/*.data' ':!programs/x509/*' ':!configs/tfm*')
```

Justification for the omissions:

* `ChangeLog`: historical text.
* `test/data_files/**`, `tests/suites/*.data`, `programs/x509/*`: many
  occurrences are significant names in certificates and such. Changing
  the spelling would invalidate many signatures and tests.
* `configs/tfm*`: this is an imported file. We'll follow the upstream
  updates.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-09-12 19:18:17 +02:00
Paul Elliott
a722d0a415 Update CMake minimum version(s) to match main CMakeLists.txt
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
2023-09-12 16:42:14 +01:00
Yanray Wang
022b9a1ca0 benchmark: add AES_CFB8
Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2023-09-12 16:28:37 +08:00
Yanray Wang
55aba195de benchmark: add AES_CFB128
Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2023-09-12 16:24:27 +08:00
Gilles Peskine
1bfc09bca7 Move comment to its intended location
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-09-09 21:26:05 +02:00
Gilles Peskine
0b62b7a21f Allow turning off re-generation of files with make
In make builds, when GEN_FILES is false (empty), don't try to re-generate
configuration-independent source files, regardless of whether they seem
out of date. This is useful, for example, if you have a source tree where
`make generated_files` has already run and file timestamps reflect the
time the files were copied or extracted, and you are now in an environment
that lacks some of the necessary tools to re-generate the files.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-09-08 16:19:13 +02:00
Ronald Cron
eab2055bde Fix query_config.c generation with CMake build system
In case of an out-of-tree build with the CMake build
system the path to crypto_config.h has to be defined
as the path to mbedtls_config.h. Add this possibility
tp generate_query_config.pl.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2023-09-08 10:23:25 +02:00
Yanray Wang
9b811658a8 Merge remote-tracking branch 'origin/development' into support_cipher_encrypt_only 2023-09-07 16:18:00 +08:00
Gilles Peskine
b9664ee676 Don't include configuration adjustment headers
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-09-05 11:57:14 +02:00
Yanray Wang
d7058b0a35 dh_client: removed under CIPHER_ENCRYPT_ONLY
dh_client requests AES-ECB to do decryption. So it needs to be
removed under CIPHER_ENCRYPT_ONLY.

Signed-off-by: Yanray Wang <yanray.wang@arm.com>
2023-09-01 17:35:58 +08:00
Gilles Peskine
f745e5b8de Merge remote-tracking branch 'development' into HEAD 2023-08-23 20:35:32 +02:00
Tom Cosgrove
17d5081ffb
Merge pull request #8099 from gilles-peskine-arm/split-config_psa-prepare
Prepare to split config_psa.h
2023-08-22 07:30:46 +00:00
Gilles Peskine
796bc2b8f9
Merge pull request #7486 from AndrzejKurek/calloc-also-zeroizes
Document mbedtls_calloc zeroization
2023-08-21 15:47:21 +00:00
Gilles Peskine
9af413bcc5 Don't try to include mbedtls/config_*.h
They're included by build_info.h and must not be included directly.

Currently, this only concerns one file: config_psa.h. It's technically a bug
to include it, but a harmless one because that header has already been
included by build_info.h except in configurations where it
effectively had no effect (enabling PSA options with PSA turned off).

We plan to split config_psa.h into multiple headers that are less
independent, which could make the inclusion more problematic.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-08-21 16:12:36 +02:00
Gilles Peskine
dbd13c3689
Merge pull request #7662 from lpy4105/issue/renew_cert_2027-01-01
Updating crt/crl files due to expiry before 2027-01-01
2023-08-17 15:38:35 +00:00
Gilles Peskine
d370f93898
Merge pull request #7898 from AndrzejKurek/csr-rfc822-dn
OPC UA - add support for RFC822 and DirectoryName SubjectAltNames when generating CSR's
2023-08-16 09:19:46 +00:00
Manuel Pégourié-Gonnard
660bbf2470 test: disable BIGNUM support on the test ecc_no_bignum component
Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
2023-08-10 06:43:23 +02:00
Paul Elliott
2f12a29cdd
Merge pull request #7896 from AgathiyanB/gitignore-generated-files-toggle
Add script to toggle ignoring generated files
2023-08-09 14:54:32 +00:00