/*
* PSA crypto core internal interfaces
*/
/*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
#ifndef PSA_CRYPTO_CORE_H
#define PSA_CRYPTO_CORE_H
/*
* Include the build-time configuration information header. Here, we do not
* include `"mbedtls/build_info.h"` directly but `"psa/build_info.h"`, which
* is basically just an alias to it. This is to ease the maintenance of the
* TF-PSA-Crypto repository which has a different build system and
* configuration.
*/
#include "psa/build_info.h"
#include "psa/crypto.h"
#include "psa/crypto_se_driver.h"
#if defined(MBEDTLS_THREADING_C)
#include "mbedtls/threading.h"
#endif
/**
* Tell if PSA is ready for this hash.
*
* \note For now, only checks the state of the driver subsystem,
* not the algorithm. Might do more in the future.
*
* \param hash_alg The hash algorithm (ignored for now).
*
* \return 1 if the driver subsytem is ready, 0 otherwise.
*/
int psa_can_do_hash(psa_algorithm_t hash_alg);
/**
* Tell if PSA is ready for this cipher.
*
* \note For now, only checks the state of the driver subsystem,
* not the algorithm. Might do more in the future.
*
* \param cipher_alg The cipher algorithm (ignored for now).
*
* \return 1 if the driver subsytem is ready, 0 otherwise.
*/
int psa_can_do_cipher(psa_key_type_t key_type, psa_algorithm_t cipher_alg);
typedef enum {
PSA_SLOT_EMPTY = 0,
PSA_SLOT_FILLING,
PSA_SLOT_FULL,
PSA_SLOT_PENDING_DELETION,
} psa_key_slot_state_t;
/** The data structure representing a key slot, containing key material
* and metadata for one key.
*/
typedef struct {
/* This field is accessed in a lot of places. Putting it first
* reduces the code size. */
psa_key_attributes_t attr;
/*
* The current state of the key slot, as described in
* docs/architecture/psa-thread-safety/psa-thread-safety.md.
*
* Library functions can modify the state of a key slot by calling
* psa_key_slot_state_transition.
*
* The state variable is used to help determine whether library functions
* which operate on the slot succeed. For example, psa_finish_key_creation,
* which transfers the state of a slot from PSA_SLOT_FILLING to
* PSA_SLOT_FULL, must fail with error code PSA_ERROR_CORRUPTION_DETECTED
* if the state of the slot is not PSA_SLOT_FILLING.
*
* Library functions which traverse the array of key slots only consider
* slots that are in a suitable state for the function.
* For example, psa_get_and_lock_key_slot_in_memory, which finds a slot
* containing a given key ID, will only check slots whose state variable is
* PSA_SLOT_FULL.
*/
psa_key_slot_state_t state;
#if defined(MBEDTLS_PSA_KEY_STORE_DYNAMIC)
/* The index of the slice containing this slot.
* This field must be filled if the slot contains a key
* (including keys being created or destroyed), and can be either
* filled or 0 when the slot is free.
*
* In most cases, the slice index can be deduced from the key identifer.
* We keep it in a separate field for robustness (it reduces the chance
* that a coding mistake in the key store will result in accessing the
* wrong slice), and also so that it's available even on code paths
* during creation or destruction where the key identifier might not be
* filled in.
* */
uint8_t slice_index;
#endif /* MBEDTLS_PSA_KEY_STORE_DYNAMIC */
union {
struct {
/* The index of the next slot in the free list for this
* slice, relative * to the next array element.
*
* That is, 0 means the next slot, 1 means the next slot
* but one, etc. -1 would mean the slot itself. -2 means
* the previous slot, etc.
*
* If this is beyond the array length, the free list ends with the
* current element.
*
* The reason for this strange encoding is that 0 means the next
* element. This way, when we allocate a slice and initialize it
* to all-zero, the slice is ready for use, with a free list that
* consists of all the slots in order.
*/
int32_t next_free_relative_to_next;
} free;
struct {
/*
* Number of functions registered as reading the material in the key slot.
*
* Library functions must not write directly to registered_readers
*
* A function must call psa_register_read(slot) before reading
* the current contents of the slot for an operation.
* They then must call psa_unregister_read(slot) once they have
* finished reading the current contents of the slot. If the key
* slot mutex is not held (when mutexes are enabled), this call
* must be done via a call to
* psa_unregister_read_under_mutex(slot).
* A function must call psa_key_slot_has_readers(slot) to check if
* the slot is in use for reading.
*
* This counter is used to prevent resetting the key slot while
* the library may access it. For example, such control is needed
* in the following scenarios:
* . In case of key slot starvation, all key slots contain the
* description of a key, and the library asks for the
* description of a persistent key not present in the
* key slots, the key slots currently accessed by the
* library cannot be reclaimed to free a key slot to load
* the persistent key.
* . In case of a multi-threaded application where one thread
* asks to close or purge or destroy a key while it is in use
* by the library through another thread. */
size_t registered_readers;
} occupied;
} var;
/* Dynamically allocated key data buffer.
* Format as specified in psa_export_key(). */
struct key_data {
uint8_t *data;
size_t bytes;
} key;
} psa_key_slot_t;
#if defined(MBEDTLS_THREADING_C)
/** Perform a mutex operation and return immediately upon failure.
*
* Returns PSA_ERROR_SERVICE_FAILURE if the operation fails
* and status was PSA_SUCCESS.
*
* Assumptions:
* psa_status_t status exists.
* f is a mutex operation which returns 0 upon success.
*/
#define PSA_THREADING_CHK_RET(f) \
do \
{ \
if ((f) != 0) { \
if (status == PSA_SUCCESS) { \
return PSA_ERROR_SERVICE_FAILURE; \
} \
return status; \
} \
} while (0);
/** Perform a mutex operation and goto exit on failure.
*
* Sets status to PSA_ERROR_SERVICE_FAILURE if status was PSA_SUCCESS.
*
* Assumptions:
* psa_status_t status exists.
* Label exit: exists.
* f is a mutex operation which returns 0 upon success.
*/
#define PSA_THREADING_CHK_GOTO_EXIT(f) \
do \
{ \
if ((f) != 0) { \
if (status == PSA_SUCCESS) { \
status = PSA_ERROR_SERVICE_FAILURE; \
} \
goto exit; \
} \
} while (0);
#endif
/** Test whether a key slot has any registered readers.
* If multi-threading is enabled, the caller must hold the
* global key slot mutex.
*
* \param[in] slot The key slot to test.
*
* \return 1 if the slot has any registered readers, 0 otherwise.
*/
static inline int psa_key_slot_has_readers(const psa_key_slot_t *slot)
{
return slot->var.occupied.registered_readers > 0;
}
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
/** Get the SE slot number of a key from the key slot storing its description.
*
* \param[in] slot The key slot to query. This must be a key slot storing
* the description of a key of a dynamically registered
* secure element, otherwise the behaviour is undefined.
*/
static inline psa_key_slot_number_t psa_key_slot_get_slot_number(
const psa_key_slot_t *slot)
{
return *((psa_key_slot_number_t *) (slot->key.data));
}
#endif
/** Completely wipe a slot in memory, including its policy.
*
* Persistent storage is not affected.
* Sets the slot's state to PSA_SLOT_EMPTY.
* If multi-threading is enabled, the caller must hold the
* global key slot mutex.
*
* \param[in,out] slot The key slot to wipe.
*
* \retval #PSA_SUCCESS
* The slot has been successfully wiped.
* \retval #PSA_ERROR_CORRUPTION_DETECTED
* The slot's state was PSA_SLOT_FULL or PSA_SLOT_PENDING_DELETION, and
* the amount of registered readers was not equal to 1. Or,
* the slot's state was PSA_SLOT_EMPTY. Or,
* the slot's state was PSA_SLOT_FILLING, and the amount
* of registered readers was not equal to 0.
*/
psa_status_t psa_wipe_key_slot(psa_key_slot_t *slot);
/** Try to allocate a buffer to an empty key slot.
*
* \param[in,out] slot Key slot to attach buffer to.
* \param[in] buffer_length Requested size of the buffer.
*
* \retval #PSA_SUCCESS
* The buffer has been successfully allocated.
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* Not enough memory was available for allocation.
* \retval #PSA_ERROR_ALREADY_EXISTS
* Trying to allocate a buffer to a non-empty key slot.
*/
psa_status_t psa_allocate_buffer_to_slot(psa_key_slot_t *slot,
size_t buffer_length);
/** Wipe key data from a slot. Preserves metadata such as the policy. */
psa_status_t psa_remove_key_data_from_memory(psa_key_slot_t *slot);
/** Copy key data (in export format) into an empty key slot.
*
* This function assumes that the slot does not contain
* any key material yet. On failure, the slot content is unchanged.
*
* \param[in,out] slot Key slot to copy the key into.
* \param[in] data Buffer containing the key material.
* \param data_length Size of the key buffer.
*
* \retval #PSA_SUCCESS
* The key has been copied successfully.
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* Not enough memory was available for allocation of the
* copy buffer.
* \retval #PSA_ERROR_ALREADY_EXISTS
* There was other key material already present in the slot.
*/
psa_status_t psa_copy_key_material_into_slot(psa_key_slot_t *slot,
const uint8_t *data,
size_t data_length);
/** Convert an Mbed TLS error code to a PSA error code
*
* \note This function is provided solely for the convenience of
* Mbed TLS and may be removed at any time without notice.
*
* \param ret An Mbed TLS-thrown error code
*
* \return The corresponding PSA error code
*/
psa_status_t mbedtls_to_psa_error(int ret);
/** Import a key in binary format.
*
* \note The signature of this function is that of a PSA driver
* import_key entry point. This function behaves as an import_key
* entry point as defined in the PSA driver interface specification for
* transparent drivers.
*
* \param[in] attributes The attributes for the key to import.
* \param[in] data The buffer containing the key data in import
* format.
* \param[in] data_length Size of the \p data buffer in bytes.
* \param[out] key_buffer The buffer to contain the key data in output
* format upon successful return.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes. This
* size is greater or equal to \p data_length.
* \param[out] key_buffer_length The length of the data written in \p
* key_buffer in bytes.
* \param[out] bits The key size in number of bits.
*
* \retval #PSA_SUCCESS The key was imported successfully.
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The key data is not correctly formatted.
* \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
*/
psa_status_t psa_import_key_into_slot(
const psa_key_attributes_t *attributes,
const uint8_t *data, size_t data_length,
uint8_t *key_buffer, size_t key_buffer_size,
size_t *key_buffer_length, size_t *bits);
/** Export a key in binary format
*
* \note The signature of this function is that of a PSA driver export_key
* entry point. This function behaves as an export_key entry point as
* defined in the PSA driver interface specification.
*
* \param[in] attributes The attributes for the key to export.
* \param[in] key_buffer Material or context of the key to export.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[out] data Buffer where the key data is to be written.
* \param[in] data_size Size of the \p data buffer in bytes.
* \param[out] data_length On success, the number of bytes written in
* \p data
*
* \retval #PSA_SUCCESS The key was exported successfully.
* \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription
* \retval #PSA_ERROR_COMMUNICATION_FAILURE \emptydescription
* \retval #PSA_ERROR_HARDWARE_FAILURE \emptydescription
* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
* \retval #PSA_ERROR_STORAGE_FAILURE \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
*/
psa_status_t psa_export_key_internal(
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
uint8_t *data, size_t data_size, size_t *data_length);
/** Export a public key or the public part of a key pair in binary format.
*
* \note The signature of this function is that of a PSA driver
* export_public_key entry point. This function behaves as an
* export_public_key entry point as defined in the PSA driver interface
* specification.
*
* \param[in] attributes The attributes for the key to export.
* \param[in] key_buffer Material or context of the key to export.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[out] data Buffer where the key data is to be written.
* \param[in] data_size Size of the \p data buffer in bytes.
* \param[out] data_length On success, the number of bytes written in
* \p data
*
* \retval #PSA_SUCCESS The public key was exported successfully.
* \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription
* \retval #PSA_ERROR_COMMUNICATION_FAILURE \emptydescription
* \retval #PSA_ERROR_HARDWARE_FAILURE \emptydescription
* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
* \retval #PSA_ERROR_STORAGE_FAILURE \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
*/
psa_status_t psa_export_public_key_internal(
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
uint8_t *data, size_t data_size, size_t *data_length);
/** Whether a key custom production parameters structure is the default.
*
* Calls to a key generation driver with non-default custom production parameters
* require a driver supporting custom production parameters.
*
* \param[in] custom The key custom production parameters to check.
* \param custom_data_length Size of the associated variable-length data
* in bytes.
*/
int psa_custom_key_parameters_are_default(
const psa_custom_key_parameters_t *custom,
size_t custom_data_length);
/**
* \brief Generate a key.
*
* \note The signature of the function is that of a PSA driver generate_key
* entry point.
*
* \param[in] attributes The attributes for the key to generate.
* \param[in] custom Custom parameters for the key generation.
* \param[in] custom_data Variable-length data associated with \c custom.
* \param custom_data_length Length of `custom_data` in bytes.
* \param[out] key_buffer Buffer where the key data is to be written.
* \param[in] key_buffer_size Size of \p key_buffer in bytes.
* \param[out] key_buffer_length On success, the number of bytes written in
* \p key_buffer.
*
* \retval #PSA_SUCCESS
* The key was generated successfully.
* \retval #PSA_ERROR_INVALID_ARGUMENT \emptydescription
* \retval #PSA_ERROR_NOT_SUPPORTED
* Key size in bits or type not supported.
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of \p key_buffer is too small.
*/
psa_status_t psa_generate_key_internal(const psa_key_attributes_t *attributes,
const psa_custom_key_parameters_t *custom,
const uint8_t *custom_data,
size_t custom_data_length,
uint8_t *key_buffer,
size_t key_buffer_size,
size_t *key_buffer_length);
/** Sign a message with a private key. For hash-and-sign algorithms,
* this includes the hashing step.
*
* \note The signature of this function is that of a PSA driver
* sign_message entry point. This function behaves as a sign_message
* entry point as defined in the PSA driver interface specification for
* transparent drivers.
*
* \note This function will call the driver for psa_sign_hash
* and go through driver dispatch again.
*
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] key_buffer The buffer containing the key context.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[in] alg A signature algorithm that is compatible with
* the type of the key.
* \param[in] input The input message to sign.
* \param[in] input_length Size of the \p input buffer in bytes.
* \param[out] signature Buffer where the signature is to be written.
* \param[in] signature_size Size of the \p signature buffer in bytes.
* \param[out] signature_length On success, the number of bytes
* that make up the returned signature value.
*
* \retval #PSA_SUCCESS \emptydescription
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p signature buffer is too small. You can
* determine a sufficient buffer size by calling
* #PSA_SIGN_OUTPUT_SIZE(\c key_type, \c key_bits, \p alg)
* where \c key_type and \c key_bits are the type and bit-size
* respectively of the key.
* \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription
* \retval #PSA_ERROR_INVALID_ARGUMENT \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_ENTROPY \emptydescription
*/
psa_status_t psa_sign_message_builtin(
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
psa_algorithm_t alg, const uint8_t *input, size_t input_length,
uint8_t *signature, size_t signature_size, size_t *signature_length);
/** Verify the signature of a message with a public key, using
* a hash-and-sign verification algorithm.
*
* \note The signature of this function is that of a PSA driver
* verify_message entry point. This function behaves as a verify_message
* entry point as defined in the PSA driver interface specification for
* transparent drivers.
*
* \note This function will call the driver for psa_verify_hash
* and go through driver dispatch again.
*
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] key_buffer The buffer containing the key context.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[in] alg A signature algorithm that is compatible with
* the type of the key.
* \param[in] input The message whose signature is to be verified.
* \param[in] input_length Size of the \p input buffer in bytes.
* \param[in] signature Buffer containing the signature to verify.
* \param[in] signature_length Size of the \p signature buffer in bytes.
*
* \retval #PSA_SUCCESS
* The signature is valid.
* \retval #PSA_ERROR_INVALID_SIGNATURE
* The calculation was performed successfully, but the passed
* signature is not a valid signature.
* \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription
* \retval #PSA_ERROR_INVALID_ARGUMENT \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
*/
psa_status_t psa_verify_message_builtin(
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
psa_algorithm_t alg, const uint8_t *input, size_t input_length,
const uint8_t *signature, size_t signature_length);
/** Sign an already-calculated hash with a private key.
*
* \note The signature of this function is that of a PSA driver
* sign_hash entry point. This function behaves as a sign_hash
* entry point as defined in the PSA driver interface specification for
* transparent drivers.
*
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] key_buffer The buffer containing the key context.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[in] alg A signature algorithm that is compatible with
* the type of the key.
* \param[in] hash The hash or message to sign.
* \param[in] hash_length Size of the \p hash buffer in bytes.
* \param[out] signature Buffer where the signature is to be written.
* \param[in] signature_size Size of the \p signature buffer in bytes.
* \param[out] signature_length On success, the number of bytes
* that make up the returned signature value.
*
* \retval #PSA_SUCCESS \emptydescription
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p signature buffer is too small. You can
* determine a sufficient buffer size by calling
* #PSA_SIGN_OUTPUT_SIZE(\c key_type, \c key_bits, \p alg)
* where \c key_type and \c key_bits are the type and bit-size
* respectively of the key.
* \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription
* \retval #PSA_ERROR_INVALID_ARGUMENT \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_ENTROPY \emptydescription
*/
psa_status_t psa_sign_hash_builtin(
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
uint8_t *signature, size_t signature_size, size_t *signature_length);
/**
* \brief Verify the signature a hash or short message using a public key.
*
* \note The signature of this function is that of a PSA driver
* verify_hash entry point. This function behaves as a verify_hash
* entry point as defined in the PSA driver interface specification for
* transparent drivers.
*
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] key_buffer The buffer containing the key context.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[in] alg A signature algorithm that is compatible with
* the type of the key.
* \param[in] hash The hash or message whose signature is to be
* verified.
* \param[in] hash_length Size of the \p hash buffer in bytes.
* \param[in] signature Buffer containing the signature to verify.
* \param[in] signature_length Size of the \p signature buffer in bytes.
*
* \retval #PSA_SUCCESS
* The signature is valid.
* \retval #PSA_ERROR_INVALID_SIGNATURE
* The calculation was performed successfully, but the passed
* signature is not a valid signature.
* \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription
* \retval #PSA_ERROR_INVALID_ARGUMENT \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
*/
psa_status_t psa_verify_hash_builtin(
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
const uint8_t *signature, size_t signature_length);
/**
* \brief Validate the key bit size for unstructured keys.
*
* \note Check that the bit size is acceptable for a given key type for
* unstructured keys.
*
* \param[in] type The key type
* \param[in] bits The number of bits of the key
*
* \retval #PSA_SUCCESS
* The key type and size are valid.
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The size in bits of the key is not valid.
* \retval #PSA_ERROR_NOT_SUPPORTED
* The type and/or the size in bits of the key or the combination of
* the two is not supported.
*/
psa_status_t psa_validate_unstructured_key_bit_size(psa_key_type_t type,
size_t bits);
/** Perform a key agreement and return the raw shared secret, using
built-in raw key agreement functions.
*
* \note The signature of this function is that of a PSA driver
* key_agreement entry point. This function behaves as a key_agreement
* entry point as defined in the PSA driver interface specification for
* transparent drivers.
*
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] key_buffer The buffer containing the private key
* context.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in
* bytes.
* \param[in] alg A key agreement algorithm that is
* compatible with the type of the key.
* \param[in] peer_key The buffer containing the key context
* of the peer's public key.
* \param[in] peer_key_length Size of the \p peer_key buffer in
* bytes.
* \param[out] shared_secret The buffer to which the shared secret
* is to be written.
* \param[in] shared_secret_size Size of the \p shared_secret buffer in
* bytes.
* \param[out] shared_secret_length On success, the number of bytes that make
* up the returned shared secret.
* \retval #PSA_SUCCESS
* Success. Shared secret successfully calculated.
* \retval #PSA_ERROR_INVALID_HANDLE \emptydescription
* \retval #PSA_ERROR_NOT_PERMITTED \emptydescription
* \retval #PSA_ERROR_INVALID_ARGUMENT
* \p alg is not a key agreement algorithm, or
* \p private_key is not compatible with \p alg,
* or \p peer_key is not valid for \p alg or not compatible with
* \p private_key.
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* \p shared_secret_size is too small
* \retval #PSA_ERROR_NOT_SUPPORTED
* \p alg is not a supported key agreement algorithm.
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
* \retval #PSA_ERROR_COMMUNICATION_FAILURE \emptydescription
* \retval #PSA_ERROR_HARDWARE_FAILURE \emptydescription
* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
* \retval #PSA_ERROR_STORAGE_FAILURE \emptydescription
* \retval #PSA_ERROR_BAD_STATE \emptydescription
*/
psa_status_t psa_key_agreement_raw_builtin(
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer,
size_t key_buffer_size,
psa_algorithm_t alg,
const uint8_t *peer_key,
size_t peer_key_length,
uint8_t *shared_secret,
size_t shared_secret_size,
size_t *shared_secret_length);
/**
* \brief Set the maximum number of ops allowed to be executed by an
* interruptible function in a single call.
*
* \note The signature of this function is that of a PSA driver
* interruptible_set_max_ops entry point. This function behaves as an
* interruptible_set_max_ops entry point as defined in the PSA driver
* interface specification for transparent drivers.
*
* \param[in] max_ops The maximum number of ops to be executed in a
* single call, this can be a number from 0 to
* #PSA_INTERRUPTIBLE_MAX_OPS_UNLIMITED, where 0
* is obviously the least amount of work done per
* call.
*/
void mbedtls_psa_interruptible_set_max_ops(uint32_t max_ops);
/**
* \brief Get the maximum number of ops allowed to be executed by an
* interruptible function in a single call.
*
* \note The signature of this function is that of a PSA driver
* interruptible_get_max_ops entry point. This function behaves as an
* interruptible_get_max_ops entry point as defined in the PSA driver
* interface specification for transparent drivers.
*
* \return Maximum number of ops allowed to be executed
* by an interruptible function in a single call.
*/
uint32_t mbedtls_psa_interruptible_get_max_ops(void);
/**
* \brief Get the number of ops that a hash signing operation has taken for the
* previous call. If no call or work has taken place, this will return
* zero.
*
* \note The signature of this function is that of a PSA driver
* sign_hash_get_num_ops entry point. This function behaves as an
* sign_hash_get_num_ops entry point as defined in the PSA driver
* interface specification for transparent drivers.
*
* \param operation The \c
* mbedtls_psa_sign_hash_interruptible_operation_t
* to use. This must be initialized first.
*
* \return Number of ops that were completed
* in the last call to \c
* mbedtls_psa_sign_hash_complete().
*/
uint32_t mbedtls_psa_sign_hash_get_num_ops(
const mbedtls_psa_sign_hash_interruptible_operation_t *operation);
/**
* \brief Get the number of ops that a hash verification operation has taken for
* the previous call. If no call or work has taken place, this will
* return zero.
*
* \note The signature of this function is that of a PSA driver
* verify_hash_get_num_ops entry point. This function behaves as an
* verify_hash_get_num_ops entry point as defined in the PSA driver
* interface specification for transparent drivers.
*
* \param operation The \c
* mbedtls_psa_verify_hash_interruptible_operation_t
* to use. This must be initialized first.
*
* \return Number of ops that were completed
* in the last call to \c
* mbedtls_psa_verify_hash_complete().
*/
uint32_t mbedtls_psa_verify_hash_get_num_ops(
const mbedtls_psa_verify_hash_interruptible_operation_t *operation);
/**
* \brief Start signing a hash or short message with a private key, in an
* interruptible manner.
*
* \note The signature of this function is that of a PSA driver
* sign_hash_start entry point. This function behaves as a
* sign_hash_start entry point as defined in the PSA driver interface
* specification for transparent drivers.
*
* \param[in] operation The \c
* mbedtls_psa_sign_hash_interruptible_operation_t
* to use. This must be initialized first.
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] key_buffer The buffer containing the key context.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[in] alg A signature algorithm that is compatible with
* the type of the key.
* \param[in] hash The hash or message to sign.
* \param hash_length Size of the \p hash buffer in bytes.
*
* \retval #PSA_SUCCESS
* The operation started successfully - call \c psa_sign_hash_complete()
* with the same context to complete the operation
* \retval #PSA_ERROR_INVALID_ARGUMENT
* An unsupported, incorrectly formatted or incorrect type of key was
* used.
* \retval #PSA_ERROR_NOT_SUPPORTED Either no internal interruptible operations
* are currently supported, or the key type is currently unsupported.
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* There was insufficient memory to load the key representation.
*/
psa_status_t mbedtls_psa_sign_hash_start(
mbedtls_psa_sign_hash_interruptible_operation_t *operation,
const psa_key_attributes_t *attributes, const uint8_t *key_buffer,
size_t key_buffer_size, psa_algorithm_t alg,
const uint8_t *hash, size_t hash_length);
/**
* \brief Continue and eventually complete the action of signing a hash or
* short message with a private key, in an interruptible manner.
*
* \note The signature of this function is that of a PSA driver
* sign_hash_complete entry point. This function behaves as a
* sign_hash_complete entry point as defined in the PSA driver interface
* specification for transparent drivers.
*
* \param[in] operation The \c
* mbedtls_psa_sign_hash_interruptible_operation_t
* to use. This must be initialized first.
*
* \param[out] signature Buffer where the signature is to be written.
* \param signature_size Size of the \p signature buffer in bytes. This
* must be appropriate for the selected
* algorithm and key.
* \param[out] signature_length On success, the number of bytes that make up
* the returned signature value.
*
* \retval #PSA_SUCCESS
* Operation completed successfully
*
* \retval #PSA_OPERATION_INCOMPLETE
* Operation was interrupted due to the setting of \c
* psa_interruptible_set_max_ops(), there is still work to be done,
* please call this function again with the same operation object.
*
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p signature buffer is too small. You can
* determine a sufficient buffer size by calling
* #PSA_SIGN_OUTPUT_SIZE(\c key_type, \c key_bits, \p alg)
* where \c key_type and \c key_bits are the type and bit-size
* respectively of \p key.
*
* \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription
* \retval #PSA_ERROR_INVALID_ARGUMENT \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_ENTROPY \emptydescription
*/
psa_status_t mbedtls_psa_sign_hash_complete(
mbedtls_psa_sign_hash_interruptible_operation_t *operation,
uint8_t *signature, size_t signature_size,
size_t *signature_length);
/**
* \brief Abort a sign hash operation.
*
* \note The signature of this function is that of a PSA driver sign_hash_abort
* entry point. This function behaves as a sign_hash_abort entry point as
* defined in the PSA driver interface specification for transparent
* drivers.
*
* \param[in] operation The \c
* mbedtls_psa_sign_hash_interruptible_operation_t
* to abort.
*
* \retval #PSA_SUCCESS
* The operation was aborted successfully.
*/
psa_status_t mbedtls_psa_sign_hash_abort(
mbedtls_psa_sign_hash_interruptible_operation_t *operation);
/**
* \brief Start reading and verifying a hash or short message, in an
* interruptible manner.
*
* \note The signature of this function is that of a PSA driver
* verify_hash_start entry point. This function behaves as a
* verify_hash_start entry point as defined in the PSA driver interface
* specification for transparent drivers.
*
* \param[in] operation The \c
* mbedtls_psa_verify_hash_interruptible_operation_t
* to use. This must be initialized first.
* \param[in] attributes The attributes of the key to use for the
* operation.
* \param[in] key_buffer The buffer containing the key context.
* \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes.
* \param[in] alg A signature algorithm that is compatible with
* the type of the key.
* \param[in] hash The hash whose signature is to be verified.
* \param hash_length Size of the \p hash buffer in bytes.
* \param[in] signature Buffer containing the signature to verify.
* \param signature_length Size of the \p signature buffer in bytes.
*
* \retval #PSA_SUCCESS
* The operation started successfully - call \c psa_sign_hash_complete()
* with the same context to complete the operation
* \retval #PSA_ERROR_INVALID_ARGUMENT
* An unsupported or incorrect type of key was used.
* \retval #PSA_ERROR_NOT_SUPPORTED
* Either no internal interruptible operations are currently supported,
* or the key type is currently unsupported.
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* There was insufficient memory either to load the key representation,
* or to prepare the operation.
*/
psa_status_t mbedtls_psa_verify_hash_start(
mbedtls_psa_verify_hash_interruptible_operation_t *operation,
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
psa_algorithm_t alg,
const uint8_t *hash, size_t hash_length,
const uint8_t *signature, size_t signature_length);
/**
* \brief Continue and eventually complete the action of signing a hash or
* short message with a private key, in an interruptible manner.
*
* \note The signature of this function is that of a PSA driver
* sign_hash_complete entry point. This function behaves as a
* sign_hash_complete entry point as defined in the PSA driver interface
* specification for transparent drivers.
*
* \param[in] operation The \c
* mbedtls_psa_sign_hash_interruptible_operation_t
* to use. This must be initialized first.
*
* \retval #PSA_SUCCESS
* Operation completed successfully, and the passed signature is valid.
*
* \retval #PSA_OPERATION_INCOMPLETE
* Operation was interrupted due to the setting of \c
* psa_interruptible_set_max_ops(), there is still work to be done,
* please call this function again with the same operation object.
*
* \retval #PSA_ERROR_INVALID_SIGNATURE
* The calculation was performed successfully, but the passed
* signature is not a valid signature.
*
* \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription
* \retval #PSA_ERROR_INVALID_ARGUMENT \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
*/
psa_status_t mbedtls_psa_verify_hash_complete(
mbedtls_psa_verify_hash_interruptible_operation_t *operation);
/**
* \brief Abort a verify signed hash operation.
*
* \note The signature of this function is that of a PSA driver
* verify_hash_abort entry point. This function behaves as a
* verify_hash_abort entry point as defined in the PSA driver interface
* specification for transparent drivers.
*
* \param[in] operation The \c
* mbedtls_psa_verify_hash_interruptible_operation_t
* to abort.
*
* \retval #PSA_SUCCESS
* The operation was aborted successfully.
*/
psa_status_t mbedtls_psa_verify_hash_abort(
mbedtls_psa_verify_hash_interruptible_operation_t *operation);
typedef struct psa_crypto_local_input_s {
uint8_t *buffer;
size_t length;
} psa_crypto_local_input_t;
#define PSA_CRYPTO_LOCAL_INPUT_INIT ((psa_crypto_local_input_t) { NULL, 0 })
/** Allocate a local copy of an input buffer and copy the contents into it.
*
* \param[in] input Pointer to input buffer.
* \param[in] input_len Length of the input buffer.
* \param[out] local_input Pointer to a psa_crypto_local_input_t struct
* containing a local input copy.
* \return #PSA_SUCCESS, if the buffer was successfully
* copied.
* \return #PSA_ERROR_INSUFFICIENT_MEMORY, if a copy of
* the buffer cannot be allocated.
*/
psa_status_t psa_crypto_local_input_alloc(const uint8_t *input, size_t input_len,
psa_crypto_local_input_t *local_input);
/** Free a local copy of an input buffer.
*
* \param[in] local_input Pointer to a psa_crypto_local_input_t struct
* populated by a previous call to
* psa_crypto_local_input_alloc().
*/
void psa_crypto_local_input_free(psa_crypto_local_input_t *local_input);
typedef struct psa_crypto_local_output_s {
uint8_t *original;
uint8_t *buffer;
size_t length;
} psa_crypto_local_output_t;
#define PSA_CRYPTO_LOCAL_OUTPUT_INIT ((psa_crypto_local_output_t) { NULL, NULL, 0 })
/** Allocate a local copy of an output buffer.
*
* \note This does not copy any data from the original
* output buffer but only allocates a buffer
* whose contents will be copied back to the
* original in a future call to
* psa_crypto_local_output_free().
*
* \param[in] output Pointer to output buffer.
* \param[in] output_len Length of the output buffer.
* \param[out] local_output Pointer to a psa_crypto_local_output_t struct to
* populate with the local output copy.
* \return #PSA_SUCCESS, if the buffer was successfully
* copied.
* \return #PSA_ERROR_INSUFFICIENT_MEMORY, if a copy of
* the buffer cannot be allocated.
*/
psa_status_t psa_crypto_local_output_alloc(uint8_t *output, size_t output_len,
psa_crypto_local_output_t *local_output);
/** Copy from a local copy of an output buffer back to the original, then
* free the local copy.
*
* \param[in] local_output Pointer to a psa_crypto_local_output_t struct
* populated by a previous call to
* psa_crypto_local_output_alloc().
* \return #PSA_SUCCESS, if the local output was
* successfully copied back to the original.
* \return #PSA_ERROR_CORRUPTION_DETECTED, if the output
* could not be copied back to the original.
*/
psa_status_t psa_crypto_local_output_free(psa_crypto_local_output_t *local_output);
#endif /* PSA_CRYPTO_CORE_H */
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