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514 lines
19 KiB
C
514 lines
19 KiB
C
/**
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* \file psa/crypto_struct.h
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*
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* \brief PSA cryptography module: Mbed TLS structured type implementations
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*
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* \note This file may not be included directly. Applications must
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* include psa/crypto.h.
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*
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* This file contains the definitions of some data structures with
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* implementation-specific definitions.
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*
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* In implementations with isolation between the application and the
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* cryptography module, it is expected that the front-end and the back-end
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* would have different versions of this file.
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*
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* <h3>Design notes about multipart operation structures</h3>
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*
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* For multipart operations without driver delegation support, each multipart
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* operation structure contains a `psa_algorithm_t alg` field which indicates
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* which specific algorithm the structure is for. When the structure is not in
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* use, `alg` is 0. Most of the structure consists of a union which is
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* discriminated by `alg`.
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*
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* For multipart operations with driver delegation support, each multipart
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* operation structure contains an `unsigned int id` field indicating which
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* driver got assigned to do the operation. When the structure is not in use,
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* 'id' is 0. The structure contains also a driver context which is the union
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* of the contexts of all drivers able to handle the type of multipart
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* operation.
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*
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* Note that when `alg` or `id` is 0, the content of other fields is undefined.
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* In particular, it is not guaranteed that a freshly-initialized structure
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* is all-zero: we initialize structures to something like `{0, 0}`, which
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* is only guaranteed to initializes the first member of the union;
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* GCC and Clang initialize the whole structure to 0 (at the time of writing),
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* but MSVC and CompCert don't.
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*
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* In Mbed Crypto, multipart operation structures live independently from
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* the key. This allows Mbed Crypto to free the key objects when destroying
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* a key slot. If a multipart operation needs to remember the key after
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* the setup function returns, the operation structure needs to contain a
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* copy of the key.
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef PSA_CRYPTO_STRUCT_H
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#define PSA_CRYPTO_STRUCT_H
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#include "mbedtls/private_access.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Include the Mbed TLS configuration file, the way Mbed TLS does it
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* in each of its header files. */
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#include "mbedtls/build_info.h"
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#include "mbedtls/cmac.h"
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#include "mbedtls/gcm.h"
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#include "mbedtls/ccm.h"
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#include "mbedtls/chachapoly.h"
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/* Include the context definition for the compiled-in drivers for the primitive
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* algorithms. */
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#include "psa/crypto_driver_contexts_primitives.h"
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struct psa_hash_operation_s
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{
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/** Unique ID indicating which driver got assigned to do the
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* operation. Since driver contexts are driver-specific, swapping
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* drivers halfway through the operation is not supported.
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* ID values are auto-generated in psa_driver_wrappers.h.
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* ID value zero means the context is not valid or not assigned to
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* any driver (i.e. the driver context is not active, in use). */
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unsigned int MBEDTLS_PRIVATE(id);
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psa_driver_hash_context_t MBEDTLS_PRIVATE(ctx);
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};
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#define PSA_HASH_OPERATION_INIT { 0, { 0 } }
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static inline struct psa_hash_operation_s psa_hash_operation_init( void )
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{
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const struct psa_hash_operation_s v = PSA_HASH_OPERATION_INIT;
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return( v );
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}
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struct psa_cipher_operation_s
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{
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/** Unique ID indicating which driver got assigned to do the
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* operation. Since driver contexts are driver-specific, swapping
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* drivers halfway through the operation is not supported.
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* ID values are auto-generated in psa_crypto_driver_wrappers.h
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* ID value zero means the context is not valid or not assigned to
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* any driver (i.e. none of the driver contexts are active). */
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unsigned int MBEDTLS_PRIVATE(id);
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unsigned int MBEDTLS_PRIVATE(iv_required) : 1;
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unsigned int MBEDTLS_PRIVATE(iv_set) : 1;
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uint8_t MBEDTLS_PRIVATE(default_iv_length);
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psa_driver_cipher_context_t MBEDTLS_PRIVATE(ctx);
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};
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#define PSA_CIPHER_OPERATION_INIT { 0, 0, 0, 0, { 0 } }
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static inline struct psa_cipher_operation_s psa_cipher_operation_init( void )
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{
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const struct psa_cipher_operation_s v = PSA_CIPHER_OPERATION_INIT;
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return( v );
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}
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/* Include the context definition for the compiled-in drivers for the composite
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* algorithms. */
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#include "psa/crypto_driver_contexts_composites.h"
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struct psa_mac_operation_s
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{
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/** Unique ID indicating which driver got assigned to do the
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* operation. Since driver contexts are driver-specific, swapping
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* drivers halfway through the operation is not supported.
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* ID values are auto-generated in psa_driver_wrappers.h
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* ID value zero means the context is not valid or not assigned to
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* any driver (i.e. none of the driver contexts are active). */
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unsigned int MBEDTLS_PRIVATE(id);
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uint8_t MBEDTLS_PRIVATE(mac_size);
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unsigned int MBEDTLS_PRIVATE(is_sign) : 1;
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psa_driver_mac_context_t MBEDTLS_PRIVATE(ctx);
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};
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#define PSA_MAC_OPERATION_INIT { 0, 0, 0, { 0 } }
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static inline struct psa_mac_operation_s psa_mac_operation_init( void )
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{
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const struct psa_mac_operation_s v = PSA_MAC_OPERATION_INIT;
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return( v );
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}
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struct psa_aead_operation_s
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{
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/** Unique ID indicating which driver got assigned to do the
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* operation. Since driver contexts are driver-specific, swapping
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* drivers halfway through the operation is not supported.
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* ID values are auto-generated in psa_crypto_driver_wrappers.h
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* ID value zero means the context is not valid or not assigned to
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* any driver (i.e. none of the driver contexts are active). */
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unsigned int MBEDTLS_PRIVATE(id);
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psa_algorithm_t MBEDTLS_PRIVATE(alg);
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psa_key_type_t MBEDTLS_PRIVATE(key_type);
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size_t MBEDTLS_PRIVATE(ad_remaining);
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size_t MBEDTLS_PRIVATE(body_remaining);
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unsigned int MBEDTLS_PRIVATE(nonce_set) : 1;
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unsigned int MBEDTLS_PRIVATE(lengths_set) : 1;
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unsigned int MBEDTLS_PRIVATE(ad_started) : 1;
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unsigned int MBEDTLS_PRIVATE(body_started) : 1;
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unsigned int MBEDTLS_PRIVATE(is_encrypt) : 1;
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psa_driver_aead_context_t MBEDTLS_PRIVATE(ctx);
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};
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#define PSA_AEAD_OPERATION_INIT {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0}}
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static inline struct psa_aead_operation_s psa_aead_operation_init( void )
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{
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const struct psa_aead_operation_s v = PSA_AEAD_OPERATION_INIT;
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return( v );
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}
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#if defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF) || \
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defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXTRACT) || \
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defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXPAND)
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typedef struct
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{
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uint8_t *MBEDTLS_PRIVATE(info);
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size_t MBEDTLS_PRIVATE(info_length);
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#if PSA_HASH_MAX_SIZE > 0xff
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#error "PSA_HASH_MAX_SIZE does not fit in uint8_t"
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#endif
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uint8_t MBEDTLS_PRIVATE(offset_in_block);
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uint8_t MBEDTLS_PRIVATE(block_number);
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unsigned int MBEDTLS_PRIVATE(state) : 2;
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unsigned int MBEDTLS_PRIVATE(info_set) : 1;
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uint8_t MBEDTLS_PRIVATE(output_block)[PSA_HASH_MAX_SIZE];
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uint8_t MBEDTLS_PRIVATE(prk)[PSA_HASH_MAX_SIZE];
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struct psa_mac_operation_s MBEDTLS_PRIVATE(hmac);
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} psa_hkdf_key_derivation_t;
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#endif /* MBEDTLS_PSA_BUILTIN_ALG_HKDF ||
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MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXTRACT ||
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MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXPAND */
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#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_ECJPAKE_TO_PMS)
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typedef struct
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{
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uint8_t MBEDTLS_PRIVATE(data)[PSA_TLS12_ECJPAKE_TO_PMS_DATA_SIZE];
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} psa_tls12_ecjpake_to_pms_t;
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#endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_ECJPAKE_TO_PMS */
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#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) || \
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defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS)
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typedef enum
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{
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PSA_TLS12_PRF_STATE_INIT, /* no input provided */
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PSA_TLS12_PRF_STATE_SEED_SET, /* seed has been set */
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PSA_TLS12_PRF_STATE_OTHER_KEY_SET, /* other key has been set - optional */
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PSA_TLS12_PRF_STATE_KEY_SET, /* key has been set */
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PSA_TLS12_PRF_STATE_LABEL_SET, /* label has been set */
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PSA_TLS12_PRF_STATE_OUTPUT /* output has been started */
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} psa_tls12_prf_key_derivation_state_t;
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typedef struct psa_tls12_prf_key_derivation_s
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{
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#if PSA_HASH_MAX_SIZE > 0xff
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#error "PSA_HASH_MAX_SIZE does not fit in uint8_t"
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#endif
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/* Indicates how many bytes in the current HMAC block have
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* not yet been read by the user. */
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uint8_t MBEDTLS_PRIVATE(left_in_block);
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/* The 1-based number of the block. */
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uint8_t MBEDTLS_PRIVATE(block_number);
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psa_tls12_prf_key_derivation_state_t MBEDTLS_PRIVATE(state);
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uint8_t *MBEDTLS_PRIVATE(secret);
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size_t MBEDTLS_PRIVATE(secret_length);
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uint8_t *MBEDTLS_PRIVATE(seed);
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size_t MBEDTLS_PRIVATE(seed_length);
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uint8_t *MBEDTLS_PRIVATE(label);
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size_t MBEDTLS_PRIVATE(label_length);
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#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS)
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uint8_t *MBEDTLS_PRIVATE(other_secret);
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size_t MBEDTLS_PRIVATE(other_secret_length);
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#endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS */
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uint8_t MBEDTLS_PRIVATE(Ai)[PSA_HASH_MAX_SIZE];
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/* `HMAC_hash( prk, A( i ) + seed )` in the notation of RFC 5246, Sect. 5. */
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uint8_t MBEDTLS_PRIVATE(output_block)[PSA_HASH_MAX_SIZE];
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} psa_tls12_prf_key_derivation_t;
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#endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) ||
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* MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS */
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struct psa_key_derivation_s
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{
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psa_algorithm_t MBEDTLS_PRIVATE(alg);
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unsigned int MBEDTLS_PRIVATE(can_output_key) : 1;
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size_t MBEDTLS_PRIVATE(capacity);
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union
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{
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/* Make the union non-empty even with no supported algorithms. */
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uint8_t MBEDTLS_PRIVATE(dummy);
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#if defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF) || \
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defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXTRACT) || \
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defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXPAND)
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psa_hkdf_key_derivation_t MBEDTLS_PRIVATE(hkdf);
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#endif
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#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) || \
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defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS)
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psa_tls12_prf_key_derivation_t MBEDTLS_PRIVATE(tls12_prf);
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#endif
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#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_ECJPAKE_TO_PMS)
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psa_tls12_ecjpake_to_pms_t MBEDTLS_PRIVATE(tls12_ecjpake_to_pms);
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#endif
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} MBEDTLS_PRIVATE(ctx);
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};
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/* This only zeroes out the first byte in the union, the rest is unspecified. */
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#define PSA_KEY_DERIVATION_OPERATION_INIT { 0, 0, 0, { 0 } }
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static inline struct psa_key_derivation_s psa_key_derivation_operation_init(
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void )
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{
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const struct psa_key_derivation_s v = PSA_KEY_DERIVATION_OPERATION_INIT;
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return( v );
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}
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struct psa_key_policy_s
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{
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psa_key_usage_t MBEDTLS_PRIVATE(usage);
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psa_algorithm_t MBEDTLS_PRIVATE(alg);
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psa_algorithm_t MBEDTLS_PRIVATE(alg2);
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};
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typedef struct psa_key_policy_s psa_key_policy_t;
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#define PSA_KEY_POLICY_INIT { 0, 0, 0 }
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static inline struct psa_key_policy_s psa_key_policy_init( void )
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{
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const struct psa_key_policy_s v = PSA_KEY_POLICY_INIT;
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return( v );
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}
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/* The type used internally for key sizes.
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* Public interfaces use size_t, but internally we use a smaller type. */
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typedef uint16_t psa_key_bits_t;
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/* The maximum value of the type used to represent bit-sizes.
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* This is used to mark an invalid key size. */
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#define PSA_KEY_BITS_TOO_LARGE ( ( psa_key_bits_t ) -1 )
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/* The maximum size of a key in bits.
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* Currently defined as the maximum that can be represented, rounded down
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* to a whole number of bytes.
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* This is an uncast value so that it can be used in preprocessor
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* conditionals. */
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#define PSA_MAX_KEY_BITS 0xfff8
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/** A mask of flags that can be stored in key attributes.
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*
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* This type is also used internally to store flags in slots. Internal
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* flags are defined in library/psa_crypto_core.h. Internal flags may have
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* the same value as external flags if they are properly handled during
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* key creation and in psa_get_key_attributes.
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*/
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typedef uint16_t psa_key_attributes_flag_t;
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#define MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER \
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( (psa_key_attributes_flag_t) 0x0001 )
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/* A mask of key attribute flags used externally only.
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* Only meant for internal checks inside the library. */
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#define MBEDTLS_PSA_KA_MASK_EXTERNAL_ONLY ( \
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MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER | \
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0 )
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/* A mask of key attribute flags used both internally and externally.
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* Currently there aren't any. */
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#define MBEDTLS_PSA_KA_MASK_DUAL_USE ( \
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0 )
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typedef struct
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{
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psa_key_type_t MBEDTLS_PRIVATE(type);
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psa_key_bits_t MBEDTLS_PRIVATE(bits);
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psa_key_lifetime_t MBEDTLS_PRIVATE(lifetime);
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mbedtls_svc_key_id_t MBEDTLS_PRIVATE(id);
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psa_key_policy_t MBEDTLS_PRIVATE(policy);
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psa_key_attributes_flag_t MBEDTLS_PRIVATE(flags);
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} psa_core_key_attributes_t;
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#define PSA_CORE_KEY_ATTRIBUTES_INIT { PSA_KEY_TYPE_NONE, 0, \
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PSA_KEY_LIFETIME_VOLATILE, \
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MBEDTLS_SVC_KEY_ID_INIT, \
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PSA_KEY_POLICY_INIT, 0 }
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struct psa_key_attributes_s
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{
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psa_core_key_attributes_t MBEDTLS_PRIVATE(core);
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#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
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psa_key_slot_number_t MBEDTLS_PRIVATE(slot_number);
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#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
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void *MBEDTLS_PRIVATE(domain_parameters);
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size_t MBEDTLS_PRIVATE(domain_parameters_size);
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};
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#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
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#define PSA_KEY_ATTRIBUTES_INIT { PSA_CORE_KEY_ATTRIBUTES_INIT, 0, NULL, 0 }
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#else
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#define PSA_KEY_ATTRIBUTES_INIT { PSA_CORE_KEY_ATTRIBUTES_INIT, NULL, 0 }
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#endif
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static inline struct psa_key_attributes_s psa_key_attributes_init( void )
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{
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const struct psa_key_attributes_s v = PSA_KEY_ATTRIBUTES_INIT;
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return( v );
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}
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static inline void psa_set_key_id( psa_key_attributes_t *attributes,
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mbedtls_svc_key_id_t key )
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{
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psa_key_lifetime_t lifetime = attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime);
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attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id) = key;
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if( PSA_KEY_LIFETIME_IS_VOLATILE( lifetime ) )
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{
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attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime) =
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PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION(
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PSA_KEY_LIFETIME_PERSISTENT,
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PSA_KEY_LIFETIME_GET_LOCATION( lifetime ) );
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}
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}
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static inline mbedtls_svc_key_id_t psa_get_key_id(
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const psa_key_attributes_t *attributes )
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{
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return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id) );
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}
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#ifdef MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER
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static inline void mbedtls_set_key_owner_id( psa_key_attributes_t *attributes,
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mbedtls_key_owner_id_t owner )
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{
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attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id).MBEDTLS_PRIVATE(owner) = owner;
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}
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#endif
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static inline void psa_set_key_lifetime( psa_key_attributes_t *attributes,
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psa_key_lifetime_t lifetime )
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{
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attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime) = lifetime;
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if( PSA_KEY_LIFETIME_IS_VOLATILE( lifetime ) )
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{
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#ifdef MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER
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attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id).MBEDTLS_PRIVATE(key_id) = 0;
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#else
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attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id) = 0;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static inline psa_key_lifetime_t psa_get_key_lifetime(
|
|
const psa_key_attributes_t *attributes )
|
|
{
|
|
return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime) );
|
|
}
|
|
|
|
static inline void psa_extend_key_usage_flags( psa_key_usage_t *usage_flags )
|
|
{
|
|
if( *usage_flags & PSA_KEY_USAGE_SIGN_HASH )
|
|
*usage_flags |= PSA_KEY_USAGE_SIGN_MESSAGE;
|
|
|
|
if( *usage_flags & PSA_KEY_USAGE_VERIFY_HASH )
|
|
*usage_flags |= PSA_KEY_USAGE_VERIFY_MESSAGE;
|
|
}
|
|
|
|
static inline void psa_set_key_usage_flags(psa_key_attributes_t *attributes,
|
|
psa_key_usage_t usage_flags)
|
|
{
|
|
psa_extend_key_usage_flags( &usage_flags );
|
|
attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(usage) = usage_flags;
|
|
}
|
|
|
|
static inline psa_key_usage_t psa_get_key_usage_flags(
|
|
const psa_key_attributes_t *attributes )
|
|
{
|
|
return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(usage) );
|
|
}
|
|
|
|
static inline void psa_set_key_algorithm( psa_key_attributes_t *attributes,
|
|
psa_algorithm_t alg )
|
|
{
|
|
attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(alg) = alg;
|
|
}
|
|
|
|
static inline psa_algorithm_t psa_get_key_algorithm(
|
|
const psa_key_attributes_t *attributes )
|
|
{
|
|
return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(alg) );
|
|
}
|
|
|
|
/* This function is declared in crypto_extra.h, which comes after this
|
|
* header file, but we need the function here, so repeat the declaration. */
|
|
psa_status_t psa_set_key_domain_parameters( psa_key_attributes_t *attributes,
|
|
psa_key_type_t type,
|
|
const uint8_t *data,
|
|
size_t data_length );
|
|
|
|
static inline void psa_set_key_type( psa_key_attributes_t *attributes,
|
|
psa_key_type_t type )
|
|
{
|
|
if( attributes->MBEDTLS_PRIVATE(domain_parameters) == NULL )
|
|
{
|
|
/* Common case: quick path */
|
|
attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(type) = type;
|
|
}
|
|
else
|
|
{
|
|
/* Call the bigger function to free the old domain parameters.
|
|
* Ignore any errors which may arise due to type requiring
|
|
* non-default domain parameters, since this function can't
|
|
* report errors. */
|
|
(void) psa_set_key_domain_parameters( attributes, type, NULL, 0 );
|
|
}
|
|
}
|
|
|
|
static inline psa_key_type_t psa_get_key_type(
|
|
const psa_key_attributes_t *attributes )
|
|
{
|
|
return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(type) );
|
|
}
|
|
|
|
static inline void psa_set_key_bits( psa_key_attributes_t *attributes,
|
|
size_t bits )
|
|
{
|
|
if( bits > PSA_MAX_KEY_BITS )
|
|
attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(bits) = PSA_KEY_BITS_TOO_LARGE;
|
|
else
|
|
attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(bits) = (psa_key_bits_t) bits;
|
|
}
|
|
|
|
static inline size_t psa_get_key_bits(
|
|
const psa_key_attributes_t *attributes )
|
|
{
|
|
return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(bits) );
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* PSA_CRYPTO_STRUCT_H */
|