The structures mbedtls_x509_time, mbedtls_x509_crl_entry, mbedtls_x509_crl,
mbedtls_x509_crt, mbedtls_x509_san_other_name,
mbedtls_x509_subject_alternative_name, mbedtls_x509_csr are designed to
expose the result of parsing X.509 data. Document many of their fields as
being publicly readable.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
The structures mbedtls_asn1_buf, mbedtls_asn1_bitstring,
mbedtls_asn1_sequence and mbedtls_asn1_named_data are designed to allow
access to data after parsing. Make their fields public.
Document that chaining fields are essentially read-only.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
On platforms with BSD-like sockets, it is useful for applications to have
access to the underlying file descriptor so that they can use functions like
select() and poll().
Do not promise that the field will exist on other platforms such as
Windows (where the type and name of the field are technically wrong because
Windows socket handles are actually not file descriptors).
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Add functions to read the type, mode, name and key_bitlen fields from
mbedtls_cipher_info_t. These are the fields that applications are most
likely to care about.
TLS code also uses iv_size and block_size, which it might make sense to
expose, but most applications shouldn't need those, so I'm not exposing them
for now.
Call the new functions in unit tests, so they're at least smoke-tested.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
The whole point of this structure is to provide information, both for the
library's own sake and to applications.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Conflicts:
library/ccm.c
Conflict resolved by re-applying the MBEDTLS_BYTE_0 macro.
Conflict resolved by ignoring the MBEDTLS_PUT_UINT16_BE macro
used in development branch on the 'b' buffer, because the 'b'
buffer is removed in current branch.
The numerical identifier of the CID extension hasn't been settled yet
and different implementations use values from different drafts. Allow
configuring the value at compile time.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Move logic to ccm_starts, ccm_set_lengths, ccm_update_ad,
ccm_update and ccm_finish
Use separate variable to track context state.
Encode first block only if both mbedtls_ccm_starts() and
mbedtls_ccm_set_lengths() were called.
Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
Now that descriptions of error codes no longer have to be on the same line
for the sake of generate_errors.pl, move them to their own line before the
definition. This aligns them with what we do for other definitions, and
means that we no longer need to have very long lines containing both the C
definition and the comment.
```
perl -i -pe 's~^(#define +MBEDTLS_ERR_\w+ +-\w+) */\*[*!]<(.*)\*/~/**$2*/\n$1~' include/mbedtls/*.h
```
This commit does not change the output of generate_errors.pl.
Signed-off-by: Gilles Peskine <Gilles.Peskine@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>
