Commit graph

1623 commits

Author SHA1 Message Date
XiaokangQian
c4b8c99a38 Rebase and solve conflicts and issues
Change-Id: I17246c5b2f8a8ec4989c8b0b83b55cad0491b78a
Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
2022-04-20 07:43:48 +00:00
Paul Elliott
a2da9c7e45
Merge pull request #5631 from gstrauss/enum-tls-vers
Unify internal/external TLS protocol version enums
2022-04-19 17:05:26 +01:00
Glenn Strauss
041a37635b Remove some tls_ver < MBEDTLS_SSL_VERSION_TLS1_2 checks
mbedtls no longer supports earlier TLS protocol versions

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
Glenn Strauss
2dfcea2b9d mbedtls_ssl_config 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 on little-endian platforms,
but is compatible on big-endian platforms.  For systems supporting
only TLSv1.2, the underlying values are the same (=> 3).

New setter functions are more type-safe,
taking argument as enum mbedtls_ssl_protocol_version:
mbedtls_ssl_conf_max_tls_version()
mbedtls_ssl_conf_min_tls_version()

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-04-14 15:39:43 -04:00
Glenn Strauss
da7851c825 Rename mbedtls_ssl_session minor_ver to tls_version
Store the TLS version instead of minor version number in tls_version.

Note: struct member size changed from unsigned char to uint16_t
Due to standard structure padding, the structure size does not change
unless alignment is 1-byte (instead of 2-byte or more)

Note: existing application use which accesses the struct member
(using MBEDTLS_PRIVATE) is compatible on little-endian platforms,
but not compatible on big-endian platforms.  The enum values for
the lower byte of MBEDTLS_SSL_VERSION_TLS1_2 and of
MBEDTLS_SSL_VERSION_TLS1_3 matches MBEDTLS_SSL_MINOR_VERSION_3 and
MBEDTLS_SSL_MINOR_VERSION_4, respectively.

Note: care has been taken to preserve serialized session format,
which uses only the lower byte of the TLS version.

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-04-14 15:23:57 -04:00
Glenn Strauss
07c641605e Rename mbedtls_ssl_transform minor_ver to tls_version
Store the TLS version in tls_version instead of minor version number.

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-04-14 15:23:54 -04:00
Glenn Strauss
dff84620a0 Unify internal/external TLS protocol version enums
Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-04-14 13:45:20 -04:00
Neil Armstrong
f3f46416e3 Remove ecdh_ctx variable, init & free when USE_PSA_CRYPTO isn't selected
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-04-12 14:43:39 +02:00
Neil Armstrong
a33a255dcf Disable non-PSA ECDHE code in mbedtls_ssl_psk_derive_premaster() when USE_PSA_CRYPTO is selected
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-04-12 14:40:47 +02:00
Glenn Strauss
236e17ec26 Introduce mbedtls_ssl_hs_cb_t typedef
Inline func for mbedtls_ssl_conf_cert_cb()

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-04-07 14:18:30 -04:00
Manuel Pégourié-Gonnard
1b05aff3ad
Merge pull request #5624 from superna9999/5312-tls-server-ecdh
TLS ECDH 3b: server-side static ECDH (1.2)
2022-04-07 11:46:25 +02:00
Neil Armstrong
f716a700a1 Rename mbedtls_ssl_handshake_params variable ecdh_psa_shared_key to ecdh_psa_privkey_is_external
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-04-04 11:23:46 +02:00
Ronald Cron
0e980e8e84
Merge pull request #5640 from ronald-cron-arm/version-negotiation-2
TLS 1.2/1.3 version negotiation - 2
2022-04-01 12:29:06 +02:00
Manuel Pégourié-Gonnard
33a9d61885
Merge pull request #5638 from paul-elliott-arm/ssl_cid_accessors
Accessors to own CID within mbedtls_ssl_context
2022-04-01 11:36:00 +02:00
Manuel Pégourié-Gonnard
451114fe42
Merge pull request #5647 from superna9999/5179-follow-up-tls-record-hmac-no-mdinfo
Remove md_info in ssl_tls12_populate_transform() when USE_PSA_CRYPTO is defined
2022-04-01 10:04:56 +02:00
Paul Elliott
0113cf1022 Add accessor for own cid to ssl context
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
2022-03-31 19:21:41 +01:00
Neil Armstrong
8113d25d1e Add ecdh_psa_shared_key flag to protect PSA privkey if imported
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-03-31 15:24:17 +02:00
Ronald Cron
a980adf4ce
Merge pull request #5637 from ronald-cron-arm/version-negotiation-1
TLS 1.2/1.3 version negotiation - 1
2022-03-31 11:47:16 +02:00
Ronald Cron
1fa4f6863b ssl_tls.c: Return in error if default config fails
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-31 09:27:35 +02:00
Ronald Cron
37bdaab64f tls: Simplify the logic of the config version check and test it
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-31 09:26:58 +02:00
Neil Armstrong
e451295179 Remove md_info in ssl_tls12_populate_transform() when USE_PSA_CRYPTO is defined
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-03-30 16:41:12 +02:00
Manuel Pégourié-Gonnard
3304f253d7
Merge pull request #5653 from paul-elliott-arm/handshake_over
Add mbedtls_ssl_is_handshake_over()
2022-03-30 12:16:40 +02:00
Ronald Cron
f660655b84 TLS: Allow hybrid TLS 1.2/1.3 in default configurations
This implies that when both TLS 1.2 and TLS 1.3
are included in the build all the TLS 1.2 tests
using the default configuration now go through
a version negotiation on the client side.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 18:58:31 +02:00
Ronald Cron
e71639d39b Simplify TLS major version default value setting
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 18:58:31 +02:00
Ronald Cron
9f0fba374c Add logic to switch to TLS 1.2
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 18:58:31 +02:00
Ronald Cron
e1d3f06399 Allow hybrid TLS 1.3 + TLS 1.2 configuration
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 18:58:31 +02:00
Ronald Cron
fbd9f99f10 ssl_tls.c: Move some client specific functions to ssl_client.c
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 18:58:31 +02:00
Ronald Cron
27c85e743f ssl_tls.c: Unify TLS 1.2 and TLS 1.3 SSL state logs
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 18:58:31 +02:00
Ronald Cron
8f6d39a81d Make some handshake TLS 1.3 utility routines available for TLS 1.2
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 14:42:17 +02:00
Ronald Cron
086ee0be0e ssl_tls.c: Reject TLS 1.3 version configuration for server
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 14:42:17 +02:00
Ronald Cron
a25cf58681 ssl_tls.c: Remove one unnecessary minor version check
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 14:42:17 +02:00
Ronald Cron
c2f13a0568 ssl_tls.c: Modify mbedtls_ssl_set_calc_verify_md()
Modify mbedtls_ssl_set_calc_verify_md() taking into
account that it is an TLS 1.2 only function.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 14:42:17 +02:00
Ronald Cron
4dcbca952e ssl_tls.c: Move mbedtls_ssl_set_calc_verify_md() to TLS 1.2 section
In ssl_tls.c, move mbedtls_ssl_set_calc_verify_md() under the
"if defined(MBEDTLS_SSL_PROTO_TLS1_2)" pre-processor directive
as it is specific to TLS 1.2.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 14:42:17 +02:00
Ronald Cron
81591aa0f3 ssl_tls.c: Remove ssl_set_handshake_prfs unnecessary minor_ver param
ssl_set_handshake_prfs() is TLS 1.2 specific and only called
from TLS 1.2 only code thus no need to pass the TLS minor
version of the currebt session.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 14:42:17 +02:00
Ronald Cron
f12b81d387 ssl_tls.c: Fix PSA ECDH private key destruction
In TLS 1.3, a PSA ECDH private key may be created
even if MBEDTLS_SSL_USA_PSA_CRYPTO is disabled. We
must destroy this key if still referenced by an
handshake context when we free such context.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 14:42:17 +02:00
Ronald Cron
8540cf66ac ssl_tls.c: Propose PKCS1 v1.5 signatures with SHA_384/512
In case of TLS 1.3 and hybrid TLS 1.2/1.3, propose
PKCS1 v1.5 signatures with SHA_384/512 not only
SHA_256. There is no point in not proposing them
if they are available.

In TLS 1.3 those could be useful for certificate
signature verification.

In hybrid TLS 1.2/1.3 this allows to propose for
TLS 1.2 the same set of signature algorithms.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-29 14:42:17 +02:00
Manuel Pégourié-Gonnard
39f2f73e69
Merge pull request #5630 from ronald-cron-arm/restore-full-compat-testing
Restore full TLS compatibility testing
2022-03-28 18:31:17 +02:00
Ronald Cron
fb39f15fa1 ssl_tls.c: Use ETM status only in CBC mode case
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-25 16:50:18 +01:00
XiaokangQian
9b93c0dd8d Change cookie parameters for dtls and tls 1.3
Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
2022-03-25 07:50:56 +00:00
Paul Elliott
27b0d94e25 Use mbedtls_ssl_is_handshake_over()
Switch over to using the new function both internally and in tests.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
2022-03-24 14:43:52 +00:00
Manuel Pégourié-Gonnard
f4042f076b
Merge pull request #5573 from superna9999/5176-5177-5178-5179-tsl-record-hmac
TLS record HMAC
2022-03-21 11:36:44 +01:00
Ronald Cron
8d7afc642c
Merge pull request #5523 from ronald-cron-arm/one-flush-output-development
TLS 1.3: One flush output
2022-03-21 08:44:04 +01:00
Neil Armstrong
29c0c040fc Only make PSA HMAC key exportable when NULL or CBC & not EtM in ssl_tls12_populate_transform()
This requires moving the HMAC init after CIPHER init.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-03-18 11:10:09 +01:00
Ronald Cron
3f20b77517 Improve comment
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-09 07:51:52 +01:00
Ronald Cron
66dbf9118e TLS 1.3: Do not send handshake data in handshake step handlers
Send data (call to mbedtls_ssl_flush_output()) only from
the loop over the handshake steps. That way, we do not
have to take care of the partial writings (MBEDTLS_ERR_SSL_WANT_WRITE
error code) on the network in handshake step handlers.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-03-09 07:51:52 +01:00
Neil Armstrong
6828d8fdc4 Return MBEDTLS_ERR_SSL_BAD_INPUT_DATA if MAC algorithm isn't supported in ssl_tls.c
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-03-02 15:37:11 +01:00
Neil Armstrong
321116c755 Remove spurious debug in ssl_tls12_populate_transform()
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-03-02 15:06:15 +01:00
Glenn Strauss
6989407261 Add accessor to retrieve SNI during handshake
Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-02-25 19:55:53 -05:00
Glenn Strauss
36872dbd0b Provide means to reset handshake cert list
Extend mbedtls_ssl_set_hs_own_cert() to reset handshake cert list
if cert provided is null.  Previously, mbedtls_ssl_set_hs_own_cert()
only provided a way to append to the handshake certificate list,
without providing a way to replace the handshake certificate list.

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-02-25 19:55:48 -05:00
Glenn Strauss
2ed95279c0 Add server certificate selection callback
https://github.com/ARMmbed/mbedtls/issues/5430

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
2022-02-25 17:31:49 -05:00
Neil Armstrong
e858996413 Use PSA version of mbedtls_ct_hmac() in mbedtls_ssl_decrypt_buf()
Due to mbedtls_ct_hmac() implementation the decryption MAC key
must be exportable.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-02-25 15:17:50 +01:00
Neil Armstrong
cf8841a076 Remove non-PSA MAC keys in mbedtls_ssl_transform when MBEDTLS_USE_PSA_CRYPTO is defined
Also remove last usage of non-PSA MAC keys in ssl_decrypt_non_etm_cbc() SSL test.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-02-25 15:16:49 +01:00
Neil Armstrong
0760ade761 Setup & Import HMAC keys in ssl_tls12_populate_transform()
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-02-25 15:16:49 +01:00
Neil Armstrong
39b8e7dde4 Add, Initialize & Free HMAC keys in mbedtls_ssl_transform
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-02-23 09:24:57 +01:00
Gilles Peskine
c63a1e0e15 Fix mbedtls_ssl_get_version() for TLSv1.3
Test it in ssl-opt.sh.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2022-02-21 15:14:01 +01:00
Gilles Peskine
e1a0c25f71 New function to access the TLS version from a context as an enum
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2022-02-21 15:14:01 +01:00
Jerry Yu
f1b23caa4e move wrong comments
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
18621dfd23 remove extra empty line
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
50f2f703a7 remove extra guards
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
840fbb2817 guards populate_transform reference
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
4f9e3efbeb move session_save/load_tls12
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
d9d91da7c7 move sig_hash_*
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
ee40f9d4b3 move get_key_exchange_md_tls12
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
9bccc4c63f move populate_transform
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
e93ffcd2c7 move tls_prf_get_type
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
392112c058 move tls12prf_from_cs
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
0b3d7c1ea1 move parse_finished
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
3c8e47bbbf move write_finished
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
2a9fff571d move wrapup
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
aef0015ba0 move wrapup_free_hs_transform
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
b7ba49ef74 move calc_finished_tls_sha384
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
615bd6f5b9 move calc_finished_tls_sha256
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
d952669ad8 move write_certificate
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
c2c673da59 move resend_hello_request
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
ce3dca4175 move psk_derive_premaster
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
c1cb384708 move calc_verify_tls_sha384
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
8392e0dae4 move calc_verify_tls_sha256
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
d62f87e151 move derive_keys
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
2a7b5ac791 move compute_master
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
d6ab235972 move use_opaque_psk
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
f009d86186 move set_handshake_prfs
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
dc7bd17d11 move tls_prf_sha256/384
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
ed14c93008 add static prototypes
prepare for moving functions

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:01 +08:00
Jerry Yu
53d23e2c95 Guards tls_prf functions with TLS1_2
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:00 +08:00
Jerry Yu
c73c618094 Wrap function not used by test_tls13_only
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>

# Conflicts:
#	library/ssl_tls13_generic.c
2022-02-21 09:06:00 +08:00
Jerry Yu
bef175db96 Wrap derive_keys with TLS1_2 option
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:00 +08:00
Jerry Yu
db8c48aaff tls13_only:Remove unnecessary functions
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:00 +08:00
Jerry Yu
7d2396332d fix wrong setting of max_minor version
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:00 +08:00
Jerry Yu
c5aef88be6 tls13_only: guard ssl_{cli,srv}.c with TLS1_2
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:00 +08:00
Jerry Yu
c10f6b4735 tls13_only: simple test pass
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:00 +08:00
Jerry Yu
c3091b1c8c tls13_only: compile pass
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
2022-02-21 09:06:00 +08:00
Manuel Pégourié-Gonnard
3d1f8b9c00
Merge pull request #5532 from ronald-cron-arm/tls13_and_use_psa_crypto
Make TLS 1.3 compatible with MBEDTLS_USE_PSA_CRYPTO
2022-02-16 17:33:47 +01:00
Ronald Cron
b788c044b7 Use PSA status to Mbed TLS error code conversion function
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-02-15 09:14:15 +01:00
Manuel Pégourié-Gonnard
e14b644f4d
Merge pull request #5456 from mpg/cleanup-ecdh-psa
Cleanup PSA-based ECDHE in TLS 1.2
2022-02-15 09:09:07 +01:00
Ronald Cron
f6893e11c7 Finalize PSA hash operations in TLS 1.3
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2022-02-11 16:10:34 +01:00
Manuel Pégourié-Gonnard
62b49cd06a
Merge pull request #5472 from yuhaoth/pr/move-client-auth
Move client_auth to handshake
2022-02-09 10:57:00 +01:00
Ronald Cron
6ca6faa67e
Merge pull request #5080 from xffbai/add-tls13-read-certificate-request
add tls1_3 read certificate request
2022-02-09 09:51:55 +01:00
Xiaofei Bai
c234ecf695 Update mbedtls_ssl_handshake_free() and address review comments.
Signed-off-by: Xiaofei Bai <xiaofei.bai@arm.com>
2022-02-08 10:26:42 +00:00
Xiaofei Bai
51f515a503 update based on comments
Signed-off-by: Xiaofei Bai <xiaofei.bai@arm.com>
2022-02-08 07:28:04 +00:00