Use this singleton if you need to derive a new key from the device root of trust. More...

#include <DeviceKey.h>

Inheritance diagram for DeviceKey:

Public Member Functions
int	generate_derived_key (const unsigned char isalt, size_t isalt_size, unsigned char output, uint16_t ikey_type)
	Derive a new key based on the salt string. More...

int	device_inject_root_of_trust (uint32_t *value, size_t isize)
	Set a device key into the KVStore. More...

Static Public Member Functions
static DeviceKey &	get_instance ()
	As a singleton, return the single instance of the class. More...

Detailed Description

Use this singleton if you need to derive a new key from the device root of trust.

Definition at line 62 of file DeviceKey.h.

Member Function Documentation

int device_inject_root_of_trust	(	uint32_t *	value,
		size_t	isize
	)

Set a device key into the KVStore.

If entropy support is missing, call this method before calling device_key_derived_key. This method should be called only once!

Parameters

value	Input buffer contain the key.
isize	Size of the supplied key. Must be 16 bytes or 32 bytes.

Derive a new key based on the salt string.

Parameters

isalt	Input buffer used to create the new key. Same input always generates the same key
isalt_size	Size of the data in salt buffer.
output	Buffer to receive the derived key. Size must be 16 bytes or 32 bytes according to the ikey_type parameter
ikey_type	Type of the required key. Must be 16 bytes or 32 bytes.

static DeviceKey& get_instance ( )

static

As a singleton, return the single instance of the class.

Reason for this class being a singleton is the following:

Ease of use for users of this class not having to coordinate instantiations.
Lazy instantiation of internal data (which we can't achieve with simple static classes).

Definition at line 73 of file DeviceKey.h.