To keep consistent with ssl_{clien2t,server2}.
Change-Id: I08dbe47a3d9b778ba3acad283f608fef4e63c626
CustomizedGitHooks: yes
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
Base on version config, `handshack_{clinet,server}_step`
will call different step function. TLS1.3 features will
be gradully added base on it.
And a new test cases is added to make sure it reports
`feature is not available`.
Change-Id: I4f0e36cb610f5aa59f97910fb8204bfbf2825949
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
Check configuration parameter in structure setup
function to make sure the config data is available
and valid.
Current implementation checks the version config.
Available version configs are
- tls1_3 only
- tls1_2 only
issues: #4844
Change-Id: Ia762bd3d817440ae130b45f19b80a2868afae924
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
- Improves readability
- Will be useful when we introduce MPS as an alternative msg layer.
- Will be useful when we need to reset the messaging layer upon
receipt of a HelloRetryRequest in TLS 1.3.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
In TLS 1.2 specific code, the internal helper functions
ssl_populate_transform() builds an SSL transform structure,
representing a specific record protection mechanism.
In preparation for a subsequent commit which will introduce
a similar helper function specific to TLS 1.3, this commmit
renames ssl_populate_transform() to ssl_tls12_populate_transform().
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
Instances of `mbedtls_ssl_session` represent data enabling session resumption.
With the introduction of TLS 1.3, the format of this data changes. We therefore
need TLS-version field as part of `mbedtlsl_ssl_session` which allows distinguish
1.2 and 1.3 sessions.
This commit introduces such a TLS-version field to mbedtls_ssl_session.
The change has a few ramifications:
- Session serialization/deserialization routines need to be adjusted.
This is achieved by adding the TLS-version after the header of
Mbed TLS version+config, and by having the subsequent structure
of the serialized data depend on the value of this field.
The details are described in terms of the RFC 8446 presentation language.
The 1.2 session (de)serialization are moved into static helper functions,
while the top-level session (de)serialization only parses the Mbed TLS
version+config header and the TLS-version field, and dispatches according
to the found version.
This way, it will be easy to add support for TLS 1.3 sessions in the future.
- Tests for session serialization need to be adjusted
- Once we add support for TLS 1.3, with runtime negotiation of 1.2 vs. 1.3,
we will need to have some logic comparing the TLS version of the proposed session
to the negotiated TLS version. For now, however, we only support TLS 1.2,
and no such logic is needed. Instead, we just store the TLS version in the
session structure at the same point when we populate mbedtls_ssl_context.minor_ver.
The change introduces some overlap between `mbedtls_ssl_session.minor_ver` and
`mbedtls_ssl_context.minor_ver`, which should be studied and potentially resolved.
However, with both fields being private and explicitly marked so, this can happen
in a later change.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
New name MBEDTLS_ERR_SSL_BAD_CERTIFICATE
Also, replace some instances of MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE
by MBEDTLS_ERR_SSL_DECODE_ERROR and MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER
as fit.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
For TLS, secp256k1 is deprecated by RFC 8422 §5.1.1. For X.509,
secp256k1 is not deprecated, but it isn't used in practice, especially
in the context of TLS where there isn't much point in having an X.509
certificate which most peers do not support. So remove it from the
default profile. We can add it back later if there is demand.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
TLS used to prefer larger curves, under the idea that a larger curve has a
higher security strength and is therefore harder to attack. However, brute
force attacks are not a practical concern, so this was not particularly
meaningful. If a curve is considered secure enough to be allowed, then we
might as well use it.
So order curves by resource usage. The exact definition of what this means
is purposefully left open. It may include criteria such as performance and
memory usage. Risk of side channels could be a factor as well, although it
didn't affect the current choice.
The current list happens to exactly correspond to the numbers reported by
one run of the benchmark program for "full handshake/s" on my machine.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Upgrade the default list of hashes and curves allowed for TLS. The list is
now aligned with X.509 certificate verification: hashes and curves with at
least 255 bits (Curve25519 included), and RSA 2048 and above.
Remove MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE which would no
longer do anything.
Document more precisely what is allowed by default.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Removes conditional code compilation blocks
and code paths relating to the
MBEDTLS_SSL_TRUNCATED_HMAC config option.
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
mbedtls_dhm_get_value can be seen as either a copy function or a getter
function. Given the name and the semantics, it's more of a getter, even if
it "gets" by doing a copy. Therefore, put the context first, and the
selector next, leaving the output for last.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
