Commit graph

501 commits

Author SHA1 Message Date
Adrian L. Shaw 89b7152ed0 Added PSA_ERROR_STORAGE_FAILURE to psa_export_key
It may be possible that an implementation does not
fetch key material until a command like
this is called and such an error may occur if an
off-chip secure storage dependency may have been wiped.
2019-09-04 11:30:17 +01:00
Adrian L. Shaw 29b64073af Added missing return codes to get_key_attributes
Note that PSA_ERROR_NOT_PERMITTED is not included
because I can't think of a scenario where you have
a valid key handle but aren't allowed to read the
attributes
2019-09-04 11:30:17 +01:00
Jaeden Amero 98d5685b70
Merge pull request #232 from Patater/psa-crypto-api-1.0b3
Make fixes related to using Mbed Crypto as a service
2019-08-29 13:50:10 +01:00
Jaeden Amero 21db2a94a4
Merge pull request #229 from k-stachowiak/IOTCRYPT-791-remove-legacy-psa-key-derivation
Remove legacy psa key derivation
2019-08-29 11:31:23 +01:00
Jaeden Amero 6fa62a5b8f psa: Use application key ID where necessary
Avoid compiler errors when MBEDTLS_PSA_CRYPTO_KEY_FILE_ID_ENCODES_OWNER
is set by using the application ID type.

    [Error] psa_crypto_slot_management.c@175,9: used type 'psa_key_id_t' (aka 'psa_key_file_id_t') where arithmetic or pointer type is required
2019-08-28 17:24:27 +01:00
Jaeden Amero e3cdf284b2 psa: Adapt set_key_id() for when owner is included 2019-08-28 17:24:27 +01:00
Jaeden Amero 39f03fcf1a psa: Add PSA_KEY_ID_INIT
A macro useful for initializing psa_key_id_t, whether
MBEDTLS_PSA_CRYPTO_KEY_FILE_ID_ENCODES_OWNER is set or not. Without this
macro, it is necessary to know if
MBEDTLS_PSA_CRYPTO_KEY_FILE_ID_ENCODES_OWNER as with it the key ID is
non-scalar and needs to be initialized with {0, 0}, and 0 otherwise when
key ID is scalar.
2019-08-28 17:24:27 +01:00
Jaeden Amero f89cc69660 psa: Don't duplicate policy initializer
Use the PSA_KEY_POLICY_INIT macro in the definition of
PSA_CORE_KEY_ATTRIBUTES_INIT in order to avoid duplicating the key
policy initializer.
2019-08-28 17:24:27 +01:00
Jaeden Amero c7529c910b crypto_extra: Use const seed for entropy injection
The crypto.c implementation of psa_inject_entropy() didn't match the
declaration in crypto_extra.h. Use a const seed in both files.
2019-08-28 17:24:27 +01:00
Andrew Thoelke 8824daec6f Editorial fixes. 2019-08-22 15:52:32 +01:00
Andrew Thoelke 3c2b80377b Cross reference 'key handles' from INVALID_HANDLE 2019-08-22 15:52:32 +01:00
Andrew Thoelke 07f16b78ff Update documentation for psa_destroy_key
Define the affect on handles to the key and on active multipart 
operations.
2019-08-22 15:52:32 +01:00
Andrew Thoelke 3daba812d7 Update documentation for psa_close_key
Adjust the wording to permit multiple handles to a single key - closing
a handle does not necessarily release volatile memory associated with
the key, that only occurs when the last handle is closed.
2019-08-22 15:52:32 +01:00
Andrew Thoelke 9741b11440 Update psa_open_key documentation
- Describe the implementation defined behavior for opening multiple 
keys, and provide a reference to the relevant section.

- Describe the use of INSUFFICENT_MEMORY error to indicate additional 
implementation resource constaints.

- Clarify the distinction between DOES_NOT_EXIST and INVALID_HANDLE 
error conditions.
2019-08-22 15:52:32 +01:00
Andrew Thoelke 203491c65d Remove duplicated information in psa_open_key
The information about implmementation keys is duplicated.
2019-08-22 15:52:31 +01:00
Jaeden Amero 8013f44e1a Make crypto_struct C++ compatible
Avoid an error with differing linkages being expressed for
psa_set_key_domain_parameters() between crypto_extra.h and
crypto_struct.h in C++ builds.

    [Error] crypto_extra.h@456,14: conflicting declaration of 'psa_status_t psa_set_key_domain_parameters(psa_key_attributes_t*, psa_key_type_t, const uint8_t *, size_t)' with 'C' linkage
2019-08-21 12:24:40 +01:00
Jaeden Amero b090d5dc2a
Merge pull request #231 from dgreen-arm/api-to-development
Merge psa api branch into development
2019-08-21 11:50:57 +01:00
Unknown e2e19959d7 Rename AEAD macro to not use double underscores
This pattern (identifiers containing a double underscore anywhere in them)
is reserved.
2019-08-21 03:33:04 -04:00
k-stachowiak b9b4f09c47 Document new error type returned from the key derivation API 2019-08-15 19:01:59 +02:00
k-stachowiak 012dcc4b87 Remove PSA_PRE_1_0_KEY_DERIVATION and the corresponding code 2019-08-13 18:42:40 +02:00
k-stachowiak 0b74cf85ea Remove psa_key_derivation() and associated static functions 2019-08-13 18:42:27 +02:00
Gilles Peskine b4e73e9747 Add some design notes about multipart operation structures 2019-08-13 15:00:57 +02:00
Gilles Peskine f3801fff77 Update import_key and generate_key SE methods to the current API
The methods to import and generate a key in a secure element drivers
were written for an earlier version of the application-side interface.
Now that there is a psa_key_attributes_t structure that combines all
key metadata including its lifetime (location), type, size, policy and
extra type-specific data (domain parameters), pass that to drivers
instead of separate arguments for each piece of metadata. This makes
the interface less cluttered.

Update parameter names and descriptions to follow general conventions.

Document the public-key output on key generation more precisely.
Explain that it is optional in a driver, and when a driver would
implement it. Declare that it is optional in the core, too (which
means that a crypto core might not support drivers for secure elements
that do need this feature).

Update the implementation and the tests accordingly.
2019-08-09 16:43:35 +02:00
Gilles Peskine a5f8749812 SE key registration: call p_validate_slot_number
When registering a key in a secure element, if the driver has a
p_validate_slot_number method, call it.
2019-08-09 15:05:32 +02:00
Gilles Peskine d772958ffc New function mbedtls_psa_register_se_key
Register an existing key in a secure element.

Minimal implementation that doesn't call any driver method and just
lets the application declare whatever it wants.
2019-08-09 15:05:21 +02:00
Gilles Peskine e88c2c1338 Pass the key creation method to drivers
Pass the key creation method (import/generate/derive/copy) to the
driver methods to allocate or validate a slot number. This allows
drivers to enforce policies such as "this key slot can only be used
for keys generated inside the secure element".
2019-08-09 14:59:31 +02:00
Gilles Peskine 9d75202efb Clarify and expand the documentation of the allocate/create sequence 2019-08-09 11:33:48 +02:00
Gilles Peskine ae9964d3ef Add validate_slot_number method to SE drivers
Pave the way for allowing the application to choose the slot number in
a secure element, rather than always letting the driver choose.
2019-08-08 11:02:30 +02:00
Gilles Peskine 0a23322431 Improve documentation of the allocate method 2019-08-08 11:02:30 +02:00
Gilles Peskine 5fe5e27591 Test slot_number attribute
Test the behavior of the getter/setter functions.

Test that psa_get_key_slot_number() reports a slot number for a key in
a secure element, and doesn't report a slot number for a key that is
not in a secure element.

Test that psa_get_key_slot_number() reports the correct slot number
for a key in a secure element.
2019-08-08 10:58:09 +02:00
Gilles Peskine c8000c005a Add slot_number attribute
Add a slot_number field to psa_key_attributes_t and getter/setter
functions. Since slot numbers can have the value 0, indicate the
presence of the field via a separate flag.

In psa_get_key_attributes(), report the slot number if the key is in a
secure element.

When creating a key, for now, applications cannot choose a slot
number. A subsequent commit will add this capability in the secure
element HAL.
2019-08-08 10:58:09 +02:00
Gilles Peskine 91e8c33f48 Add infrastructure for key attribute flags
Add infrastructure for internal, external and dual-use flags, with a
compile-time check (if static_assert is available) to ensure that the
same numerical value doesn't get declared for two different purposes
in crypto_struct.h (external or dual-use) and
psa_crypto_core.h (internal).
2019-08-08 10:58:09 +02:00
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 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 68cc433b5b Store key sizes in 16 bits in attributes
This is larger than the maximum key size introduced in the previous
commit, by design.

Make some room for flags (not used yet).
2019-07-30 21:08:38 +02:00
Gilles Peskine c744d99386 Limit keys to 65528 bits
65528 bits is more than any reasonable key until we start supporting
post-quantum cryptography.

This limit is chosen to allow bit-sizes to be stored in 16 bits, with
65535 left to indicate an invalid value. It's a whole number of bytes,
which facilitates some calculations, in particular allowing a key of
exactly PSA_CRYPTO_MAX_STORAGE_SIZE to be created but not one bit
more.

As a resource usage limit, this is arguably too large, but that's out
of scope of the current commit.

Test that key import, generation and derivation reject overly large
sizes.
2019-07-30 20:58:33 +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
Gilles Peskine 1801740a7c SE driver: report the bit size on key import
Add a parameter to the key import method of a secure element driver to
make it report the key size in bits. This is necessary (otherwise the
core has no idea what the bit-size is), and making import report it is
easier than adding a separate method (for other key creation methods,
this information is an input, not an output).
2019-07-29 18:07:09 +02:00
Gilles Peskine adb1c52149
Merge pull request #157 from gilles-peskine-arm/psa-se_driver-create_key
Secure element key creation foundation
2019-07-26 14:39:55 +02:00
Gilles Peskine 0c3ae1f0b4 Improve documentation of SE driver persistent state
Explain what it can be used for and when it is saved to storage.
2019-07-25 14:04:38 +02:00
Gilles Peskine 6a3dd89a64 Improve alignment in comments 2019-07-25 10:56:39 +02:00
Gilles Peskine 105f67f0fa Move the definition of psa_key_attributes_t to crypto_types.h
psa_key_attributes_t is used in the SE driver HAL, so it must be
defined in a common header, not in the API-only header crypto.h.
2019-07-23 18:43:28 +02:00
Gilles Peskine 9dd125d8bb Fix overly complex Doxygen markup 2019-07-23 18:43:28 +02:00
Gilles Peskine 6032673b39 Fix Doxygen reference
Pass doxygen.sh
2019-07-22 20:10:36 +02:00
Gilles Peskine c11c4dcf95 Favor stdint.h types in internal types
Use uint8_t for PSA buffers. Keep unsigned char for generic libc
buffers and for mbedtls buffers.
2019-07-15 11:17:53 +02:00
Gilles Peskine 7228da25f9 Favor stdint.h types in implementation-specific API 2019-07-15 11:16:18 +02:00
Gilles Peskine f82088a5f4 Favor stdint.h types in example code 2019-07-15 11:16:18 +02:00
Andrew Thoelke d16bdac9b5 Use stdint.h types in multipart AEAD functions
No implementation yet.
2019-07-15 11:14:56 +02:00
Andrew Thoelke 47629d076e Use stdint.h types
Follow MISRA C 2012 rules by using exact width types from stdint.h.
2019-07-15 11:14:56 +02:00
Gilles Peskine 94cc42c28f Pass a writable pointer to the persistent data when needed
Most driver methods are not allowed to modify the persistent data, so
the driver context structure contains a const pointer to it. Pass a
non-const pointer to the persstent data to the driver methods that
need it: init, allocate, destroy.
2019-07-12 23:34:20 +02:00