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27 commits

Author SHA1 Message Date
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:

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 *  Licensed under the Apache License, Version 2.0 (the "License"); you may\
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 *  You may obtain a copy of the License at\
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 *  http://www.apache.org/licenses/LICENSE-2.0\
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 *  Unless required by applicable law or agreed to in writing, software\
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# ========================

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
2020-06-16 17:38:44 +02:00
Gilles Peskine 2b04f4683b Update SE support to pass a location when registering a driver
Now that lifetimes have structures and secure element drivers handle
all the lifetimes with a certain location, update driver registration
to take a location as argument rather than a lifetime.

This commit updates the Mbed TLS implementation.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-05-11 11:15:26 +02:00
Gilles Peskine 1a75d0c155 Strict C99: don't use an anonymous union field
GCC and Clang accept anonymous union fields, but this is not valid ISO
C. Use a named field.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-04-20 15:39:36 +02:00
Gilles Peskine 01fd875b32 Strict C99: Don't repeat the typedef for psa_se_drv_table_entry_t
GCC and Clang accept
```
typedef struct foo foo_t;
typedef struct foo { ... } foo_t;
```
But this is not valid ISO C due to the redefinition of `foo_t`.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-04-20 15:39:35 +02:00
Gilles Peskine d5536d8a5b SE driver: Fix loading of persistent data
The persistent data was not loaded correctly (the code was loading 0
bytes instead of the correct size).
2019-10-01 16:55:29 +02:00
Gilles Peskine c84c70a83c SE driver: save the persistent data after calling p_init 2019-10-01 15:41:42 +02:00
Gilles Peskine d9348f218e SE driver: call the p_init method during psa_crypto_init() 2019-10-01 15:22:29 +02:00
Gilles Peskine 5ec3a30edb SE driver: validate_slot_number: support changing persistent data
Add a parameter to the p_validate_slot_number method to allow the
driver to modify the persistent data.

With the current structure of the core, the persistent data is already
updated. All it took was adding a way to modify it.
2019-10-01 14:27:23 +02:00
Gilles Peskine 3efcebbc5e SE support: Use a transaction when registering a key
When registering a key in a secure element, go through the transaction
mechanism. This makes the code simpler, at the expense of a few extra
storage operations. Given that registering a key is typically very
rare over the lifetime of a device, this is an acceptable loss.

Drivers must now have a p_validate_slot_number method, otherwise
registering a key is not possible. This reduces the risk that due to a
mistake during the integration of a device, an application might claim
a slot in a way that is not supported by the driver.
2019-10-01 14:18:35 +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 46d9439a5e Support slot_number attribute when creating a key
Allow the application to choose the slot number in a secure element,
rather than always letting the driver choose.

With this commit, any application may request any slot. In an
implementation with isolation, it's up to the service to filter key
creation requests and apply policies to limit which applications can
request which slot.
2019-08-08 11:02:30 +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 8b66389d0d Adjust secure element code to the new ITS interface 2019-07-31 17:57:57 +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 340b127ed1 psa_destroy_se_key: explain why the error is NOT_PERMITTED 2019-07-25 14:13:24 +02:00
Gilles Peskine 2e0f388d2a Don't explicitly dereference function pointers
Be stylistically consistent.
2019-07-25 11:42:19 +02:00
Gilles Peskine 75c126b958 Explain some non-obvious parts of the code
Comment changes only.
2019-07-24 15:56:01 +02:00
Gilles Peskine 573bbc1b4e Error out if a driver tries to store more than ITS can handle
Cast explicitly for the sake of MSVC which otherwise (usefully!) warns
about the truncation.
2019-07-23 20:23:16 +02:00
Gilles Peskine 8b96cad204 SE drivers: implement persistent storage
Store the persistent data of secure element drivers.

This is fully implemented, but not at all tested.
2019-07-23 17:38:08 +02:00
Gilles Peskine 354f7671f4 SE keys: support destroy
When destroying a key in a secure element, call the driver's destroy
method and update the driver's persistent data in storage.
2019-07-12 23:46:38 +02:00
Gilles Peskine cbaff467ef SE keys: allocate a slot before creating the key 2019-07-12 23:46:04 +02:00
Gilles Peskine 5243a202c3 Driver context manipulation functions
Create the driver context when registering the driver.

Implement some helper functions to access driver information.
2019-07-12 23:42:20 +02:00
Gilles Peskine f989dbe6d8 SE driver lookup functions
Expose the type of an entry in the SE driver table as an opaque type
to other library modules. Soon, driver table entries will have state,
and callers will need to be able to access this state through
functions using this opaque type.

Provide functions to look up a driver by its lifetime and to retrieve
the method table from an entry.
2019-07-12 11:47:50 +02:00
Gilles Peskine 9717d107ca Explain that lifetime=0 from static initialization means VOLATILE 2019-06-26 20:01:35 +02:00
Gilles Peskine a8ade16ffd Gate secure element support by a separate config option
Secure element support has its own source file, and in addition
requires many hooks in other files. This is a nontrivial amount of
code, so make it optional (but default on).
2019-06-26 20:01:35 +02:00
Gilles Peskine d089021128 Unregister drivers on library deinitialization 2019-06-24 19:55:48 +02:00
Gilles Peskine a899a72fd0 Implement the secure element driver registration function 2019-06-24 19:55:44 +02:00