Commit graph

36 commits

Author SHA1 Message Date
Ronald Cron 967835596c psa: Fix references to macros in comments
This commit tries to fix the usage of #MACRO_NAME
to reference macros in comments.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2020-11-10 16:18:07 +01:00
Torstein Nesse 162a1104be Changes PSA key storage format to include key bits
* Stores bits in psa_persistent_key_storage_format.
* psa_load_persistent_key_into_slot still imports plaintext keys which
  ensures that the bits value gets set.
* Updates key specification to match new implementation.
* Expands persistent store and load tests with to check for bits
  attribute.
* Removes bits storage from psa_se_key_data_storage_t.

Signed-off-by: Torstein Nesse <torstein.nesse@silabs.com>
2020-10-07 10:54:24 +02:00
Ronald Cron 79ca4274e1 psa: storage: Use key id macros to compute ITS file identifier
Use macros instead of accessing directly the key identifier
fields for coding consistency and ease maintenance.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2020-09-02 14:27:07 +02:00
Ronald Cron ecfb237f23 Fix PSA code and unit tests
Fix PSA code and unit tests for the unit tests
to pass with key identifiers encoding owner
identifiers.

The changes in PSA code just make the enablement
of key identifiers encoding owner identifiers
platform independent. Previous to this commit,
such key identifiers were used only in the case
of PSA SPM platforms.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2020-09-02 14:27:07 +02:00
Ronald Cron 71016a9ea7 psa: Rename psa_key_file_id_t to mbedtls_svc_key_id_t
With PSA crypto v1.0.0, a volatile key identifier may
contain a owner identifier but no file is associated
to it. Thus rename the type psa_key_file_id_t to
mbedtls_svc_key_id_t to avoid a direct link with a
file when a key identifier involves an owner
identifier.

The new type name is prefixed by mbedtls to highlight
that the type is specific to Mbed TLS implementation
and not defined in the PSA Cryptography API
specification.

The svc in the type name stands for service as this
is the key identifier type from the point of view of
the service providing the Cryptography services.
The service can be completely provided by the present
library or partially in case of a multi-client service.

As a consequence rename as well:
. MBEDTLS_PSA_CRYPTO_KEY_FILE_ID_ENCODES_OWNER to
  MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER
. PSA_KEY_ID_INIT to MBEDTLS_SVC_KEY_ID_INIT
. PSA_KEY_FILE_GET_KEY_ID to MBEDTLS_SVC_KEY_ID_GET_KEY_ID
. psa_key_file_id_make to mbedtls_svc_key_id_make

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2020-09-02 14:27:07 +02:00
Ronald Cron 27238fcbd8 psa: Use psa_key_file_id_t as the key id type
The purpose of this commit and the following is for
psa_key_id_t to always be as defined by the PSA
Cryptography API specification.

Currently psa_key_id_t departs from its specification
definition when MBEDTLS_PSA_CRYPTO_KEY_FILE_ID_ENCODES_OWNER
configuration flag is set. In that configuration, it is set
to be equal to psa_key_file_id_t which in that configuration
encodes an owner identifier along the key identifier.

Type psa_key_file_id_t was meant to be the key identifier type
used throughout the library code. If
MBEDTLS_PSA_CRYPTO_KEY_FILE_ID_ENCODES_OWNER is set it
includes both a key and owner identifier, otherwise it is
equal to psa_key_id_t.

It has not been the key identifier type throughout the
library so far because when the PSA Cryptography
specification was developped the library Doxygen
documentation was used to generate the PSA Cryptography API
specification thus the need to use psa_key_id_t and not
psa_key_file_id_t.

As this constraint does not hold anymore, move
to psa_key_file_id_t as the key identifier type throughout
the library code.

By the way, this commit updates the key identifier
initialization in the tests to be compatible with a
composit key identifier. A psa_key_id_make()
inline function is introduced to initialize key
identifiers (composit ot not) at runtime.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2020-09-02 14:27:07 +02:00
Gilles Peskine 169ca7f06d psa_crypto_storage: Annotate file removal after a failed creation
Let static analyzers know that it's ok if psa_its_remove() fails here.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-08-25 22:50:06 +02:00
Bence Szépkúti 1e14827beb Update copyright notices to use Linux Foundation guidance
As a result, the copyright of contributors other than Arm is now
acknowledged, and the years of publishing are no longer tracked in the
source files.

Also remove the now-redundant lines declaring that the files are part of
MbedTLS.

This commit was generated using the following script:

# ========================
#!/bin/sh

# Find files
find '(' -path './.git' -o -path './3rdparty' ')' -prune -o -type f -print | xargs sed -bi '

# Replace copyright attribution line
s/Copyright.*Arm.*/Copyright The Mbed TLS Contributors/I

# Remove redundant declaration and the preceding line
$!N
/This file is part of Mbed TLS/Id
P
D
'
# ========================

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
2020-08-19 10:35:41 +02:00
Bence Szépkúti 869746577a Add Apache-2.0 headers to all source files
Also normalize the first line of the copyright headers.

This commit was generated using the following script:

# ========================
#!/bin/sh

# Find scripts
find -path './.git' -prune -o '(' -name '*.c' -o -name '*.cpp' -o -name '*.fmt' -o -name '*.h' ')' -print | xargs sed -i '

# Normalize the first line of the copyright headers (no text on the first line of a block comment)
/^\/\*.*Copyright.*Arm/I {
  i\
/*
  s/^\// /
}

/Copyright.*Arm/I {

  # Print copyright declaration
  p

  # Read the two lines immediately following the copyright declaration
  N
  N

  # Insert Apache header if it is missing
  /SPDX/! i\
 *  SPDX-License-Identifier: Apache-2.0\
 *\
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may\
 *  not use this file except in compliance with the License.\
 *  You may obtain a copy of the License at\
 *\
 *  http://www.apache.org/licenses/LICENSE-2.0\
 *\
 *  Unless required by applicable law or agreed to in writing, software\
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT\
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\
 *  See the License for the specific language governing permissions and\
 *  limitations under the License.

  # Clear copyright declaration from buffer
  D
}
'
# ========================

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
2020-06-16 17:38:44 +02:00
Gilles Peskine f65ed6f254 Change key types to a 16-bit encoding
All key types now have an encoding on 32 bits where the bottom 16 bits
are zero. Change to using 16 bits only.

Keep 32 bits for key types in storage, but move the significant
half-word from the top to the bottom.

Likewise, change EC curve and DH group families from 32 bits out of
which the top 8 and bottom 16 bits are zero, to 8 bits only.

Reorder psa_core_key_attributes_t to avoid padding.
2020-01-31 10:24:21 +01:00
Jaeden Amero 2ce22a5079 Stop transactions from being reentrant
We want to explicitly disallow creating new transactions when a
transaction is already in progress. However, we were incorrectly
checking for the existence of the injected entropy file before
continuing with creating a transaction. This meant we could have a
transaction already in progress and would be able to still create a new
transaction. It also meant we couldn't start a new transaction if any
entropy had been injected. Check the transaction file instead of the
injected entropy file in order to prevent multiple concurrent
transactions.
2019-10-28 15:25:10 +00:00
Gilles Peskine 0c77b0e2f9
Merge pull request #198 from gilles-peskine-arm/psa-api-1.0-beta-merge_development_20190801
Merge mbed-crypto/development into psa-api-1.0-beta
2019-08-08 10:24:53 +02:00
Gilles Peskine 8b66389d0d Adjust secure element code to the new ITS interface 2019-07-31 17:57:57 +02:00
Gilles Peskine 72c8c5b352 Merge remote-tracking branch 'upstream-crypto/development' into psa-api-1.0-beta-merge_development_20190801
Conflict resolution:
* `scripts/config.pl`:
  Take the exclusion of `MBEDTLS_PSA_CRYPTO_SE_C` from the API branch.
  Take the removal of `MBEDTLS_PSA_CRYPTO_STORAGE_ITS_C` (obsolete) from
  the development branch.
* `tests/scripts/all.sh`:
  Multiple instances of factoring a sequence of `config.pl` calls into
  a mere `config.pl baremetal` in the development branch, and a change in
  the composition of `baremetal` in the API branch. In each case, take the
  version from development.
* `tests/suites/test_suite_psa_crypto_slot_management.function`:
  A function became non-static in development and disappeared in the API
  branch. Keep the version from the API branch. Functions need to be
  non-static if they're defined but unused in some configurations,
  which is not the case for any function in this file at the moment.
* `tests/suites/test_suite_psa_crypto.function`:
  Consecutive changes in the two branches, reconciled.
2019-07-31 17:47:49 +02:00
Gilles Peskine 4ed0e6f11a Switch storage functions over to psa_core_key_attributes_t 2019-07-31 14:15:27 +02:00
Gilles Peskine 7e0cff90b9 Move attribute fields to a substructure
Move the "core attributes" to a substructure of psa_key_attribute_t.
The motivation is to be able to use the new structure
psa_core_key_attributes_t internally.
2019-07-30 20:58:27 +02:00
Simon D Hughes bda5a21112 Add psa_trusted_storage_linux persistent storage support for v1.0.0 APIs
The following provides more information on this PR:
- PSA stands for Platform Security Architecture.
- Add support for use of psa_trusted_storage_api internal_trusted_storage.h v1.0.0
  as the interface to the psa_trusted_storage_linux backend (i.e. for persistent
  storage when MBEDTLS_PSA_ITS_FILE_C is not defined). This requires changes
  to psa_crypto_its.h and psa_crypto_storage.c to migrate to the new API.
2019-07-23 17:30:37 +01:00
Gilles Peskine 0e8d495bd9 Add the lifetime to the key storage format
Stored keys must contain lifetime information. The lifetime used to be
implied by the location of the key, back when applications supplied
the lifetime value when opening the key. Now that all keys' metadata
are stored in a central location, this location needs to store the
lifetime explicitly.
2019-07-23 14:46:52 +02:00
Gilles Peskine bfd322ff34 Use a key attribute structure in the internal storage interface
Pass information via a key attribute structure rather than as separate
parameters to psa_crypto_storage functions. This makes it easier to
maintain the code when the metadata of a key evolves.

This has negligible impact on code size (+4B with "gcc -Os" on x86_64).
2019-07-23 13:31:54 +02:00
Gilles Peskine 274a2637f2 Make whitespace consistent 2019-07-23 11:29:06 +02:00
Gilles Peskine c8336cb8f9 Implement a transaction record storage for resilience
Implement a transaction record that can be used for actions that
modify more than one piece of persistent data (whether in the
persistent storage or elsewhere such as in a secure element).

While performing a transaction, the transaction file is present in
storage. If the system starts with an ongoing transaction, it must
complete the transaction (not implemented yet).
2019-07-22 19:46:22 +02:00
Gilles Peskine 110aff4c38 Enrollment algorithm in policy: implement persistent keys 2019-05-27 14:08:28 +02:00
Gilles Peskine 81efb391eb Enrollment algorithm in policy: implement persistent keys 2019-05-21 17:06:35 +02:00
Gilles Peskine 3495b58fcf Fix loading of 0-sized key on platforms where malloc(0)=NULL 2019-04-25 17:42:32 +02:00
Gilles Peskine fad3a3e4af Fix build error with MSVC on 64-bit systems
Explicitly cast size_t to uint32_t.
2019-03-15 11:15:23 +01:00
Gilles Peskine e3dbdd8d90 Gate entropy injection through a dedicated configuration option
Entropy injection has specific testing requirements. Therefore it
should depend on a specific option.
2019-03-15 11:15:21 +01:00
Gilles Peskine 5e80d91dbf Remove psa_crypto_storage_backend.h
Since there is now a single storage backend, we don't need a backend
interface. Make the functions that were declared in
psa_crypto_storage_backend.h and are now both defined and used in
psa_crypto_storage.c static, except for psa_is_key_present_in_storage
which is used by the gray-box tests and is now declared in
psa_crypto_storage.h.
2019-03-15 11:15:04 +01:00
Gilles Peskine 088b77f39c Merge psa_crypto_storage_its into psa_crypto_storage
Since the ITS API has stabilized and we don't plan to make use of more
than ITS, we don't need an abstraction layer between key storage and
key storage over ITS. Merge the ITS code into the generic storage
module.
2019-03-15 11:15:01 +01:00
Jaeden Amero 72f40c6686
Merge pull request #59 from gilles-peskine-arm/psa-its-64_bit_internal_key_id
Support key file IDs encoding the key owner
2019-02-20 13:45:12 +00:00
Gilles Peskine 5b229a06f4 Support encoding an owner in key file IDs
Differentiate between _key identifiers_, which are always `uint32_t`,
and _key file identifiers_, which are platform-dependent. Normally,
the two are the same.

In `psa/crypto_platform.h`, define `psa_app_key_id_t` (which is always
32 bits, the standard key identifier type) and
`psa_key_file_id_t` (which will be different in some service builds).
A subsequent commit will introduce a platform where the two are different.

It would make sense for the function declarations in `psa/crypto.h` to
use `psa_key_file_id_t`. However this file is currently part of the
PSA Crypto API specification, so it must stick to the standard type
`psa_key_id_t`. Hence, as long as the specification and Mbed Crypto
are not separate, use the implementation-specific file
`psa/crypto_platform.h` to define `psa_key_id_t` as `psa_key_file_id_t`.

In the library, systematically use `psa_key_file_id_t`.

    perl -i -pe 's/psa_key_id_t/psa_key_file_id_t/g' library/*.[hc]
2019-02-20 12:52:07 +01:00
itayzafrir 7723ab1739 Add common header for crypto service integration 2019-02-19 15:09:14 +02:00
itayzafrir 7132dd9796 Prepare support for 64 bit key ids in a PSA system.
Preparation for type separation between SPE and NSPE.
2019-02-19 15:08:07 +02:00
Jaeden Amero db29ab528a psa: Fix builds without MBEDTLS_PLATFORM_C
When `MBEDTLS_PLATFORM_C` is not enabled, our PSA Crypto implementation
depends on the standard C library for functions like snprintf() and
exit(). However, our implementation was not including the proper header
files nor redefining all `mbedtls_*` symbols properly to ensure
successful builds without MBEDTLS_PLATFORM_C. Add the necessary header
files and macro definitions to our PSA Crypto implementation.
2019-02-14 16:01:14 +00:00
Gilles Peskine 8d4919bc6a Persistent storage implementation: psa_key_slot_t -> psa_key_id_t
Move the persistent storage implementation from psa_key_slot_t to
psa_key_id_t. For the most part, this just means changing the types of
function arguments.

Update the documentation of some functions to reflect the fact that
the slot identifier is purely a storage identifier and is not related
to how the slot is designated in memory.
2018-12-11 16:48:13 +01:00
Moran Peker 96ebf9efcf psa: Add magic header to storage backend
Add a magic header to the storage format used with files. The
header is used as an initial check that the data is what we expect,
rather than garbage data.
2018-11-20 15:21:22 +00:00
Darryl Green db2b8db715 psa: Add storage implementation for files
Add new functions, psa_load_persistent_key(),
psa_free_persistent_key_data(), and psa_save_persistent_key(), for
managing persistent keys. These functions load to or save from our
internal representation of key slots. Serialization is a concern of the
storage backend implementation and doesn't abstraction-leak into the
lifetime management code.

An initial implementation for files is provided. Additional storage
backends can implement this interface for other storage types.
2018-11-20 15:21:22 +00:00