diff options
Diffstat (limited to 'include/psa/crypto_struct.h')
| -rw-r--r-- | include/psa/crypto_struct.h | 513 |
1 files changed, 513 insertions, 0 deletions
diff --git a/include/psa/crypto_struct.h b/include/psa/crypto_struct.h new file mode 100644 index 000000000..afba32502 --- /dev/null +++ b/include/psa/crypto_struct.h @@ -0,0 +1,513 @@ +/** + * \file psa/crypto_struct.h + * + * \brief PSA cryptography module: Mbed TLS structured type implementations + * + * \note This file may not be included directly. Applications must + * include psa/crypto.h. + * + * This file contains the definitions of some data structures with + * implementation-specific definitions. + * + * In implementations with isolation between the application and the + * cryptography module, it is expected that the front-end and the back-end + * would have different versions of this file. + * + * <h3>Design notes about multipart operation structures</h3> + * + * For multipart operations without driver delegation support, each multipart + * operation structure contains a `psa_algorithm_t alg` field which indicates + * which specific algorithm the structure is for. When the structure is not in + * use, `alg` is 0. Most of the structure consists of a union which is + * discriminated by `alg`. + * + * For multipart operations with driver delegation support, each multipart + * operation structure contains an `unsigned int id` field indicating which + * driver got assigned to do the operation. When the structure is not in use, + * 'id' is 0. The structure contains also a driver context which is the union + * of the contexts of all drivers able to handle the type of multipart + * operation. + * + * Note that when `alg` or `id` is 0, the content of other fields is undefined. + * In particular, it is not guaranteed that a freshly-initialized structure + * is all-zero: we initialize structures to something like `{0, 0}`, which + * is only guaranteed to initializes the first member of the union; + * GCC and Clang initialize the whole structure to 0 (at the time of writing), + * but MSVC and CompCert don't. + * + * In Mbed Crypto, multipart operation structures live independently from + * the key. This allows Mbed Crypto to free the key objects when destroying + * a key slot. If a multipart operation needs to remember the key after + * the setup function returns, the operation structure needs to contain a + * copy of the key. + */ +/* + * Copyright The Mbed TLS Contributors + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef PSA_CRYPTO_STRUCT_H +#define PSA_CRYPTO_STRUCT_H +#include "mbedtls/private_access.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* Include the Mbed TLS configuration file, the way Mbed TLS does it + * in each of its header files. */ +#include "mbedtls/build_info.h" + +#include "mbedtls/cmac.h" +#include "mbedtls/gcm.h" +#include "mbedtls/ccm.h" +#include "mbedtls/chachapoly.h" + +/* Include the context definition for the compiled-in drivers for the primitive + * algorithms. */ +#include "psa/crypto_driver_contexts_primitives.h" + +struct psa_hash_operation_s +{ + /** Unique ID indicating which driver got assigned to do the + * operation. Since driver contexts are driver-specific, swapping + * drivers halfway through the operation is not supported. + * ID values are auto-generated in psa_driver_wrappers.h. + * ID value zero means the context is not valid or not assigned to + * any driver (i.e. the driver context is not active, in use). */ + unsigned int MBEDTLS_PRIVATE(id); + psa_driver_hash_context_t MBEDTLS_PRIVATE(ctx); +}; + +#define PSA_HASH_OPERATION_INIT { 0, { 0 } } +static inline struct psa_hash_operation_s psa_hash_operation_init( void ) +{ + const struct psa_hash_operation_s v = PSA_HASH_OPERATION_INIT; + return( v ); +} + +struct psa_cipher_operation_s +{ + /** Unique ID indicating which driver got assigned to do the + * operation. Since driver contexts are driver-specific, swapping + * drivers halfway through the operation is not supported. + * ID values are auto-generated in psa_crypto_driver_wrappers.h + * ID value zero means the context is not valid or not assigned to + * any driver (i.e. none of the driver contexts are active). */ + unsigned int MBEDTLS_PRIVATE(id); + + unsigned int MBEDTLS_PRIVATE(iv_required) : 1; + unsigned int MBEDTLS_PRIVATE(iv_set) : 1; + + uint8_t MBEDTLS_PRIVATE(default_iv_length); + + psa_driver_cipher_context_t MBEDTLS_PRIVATE(ctx); +}; + +#define PSA_CIPHER_OPERATION_INIT { 0, 0, 0, 0, { 0 } } +static inline struct psa_cipher_operation_s psa_cipher_operation_init( void ) +{ + const struct psa_cipher_operation_s v = PSA_CIPHER_OPERATION_INIT; + return( v ); +} + +/* Include the context definition for the compiled-in drivers for the composite + * algorithms. */ +#include "psa/crypto_driver_contexts_composites.h" + +struct psa_mac_operation_s +{ + /** Unique ID indicating which driver got assigned to do the + * operation. Since driver contexts are driver-specific, swapping + * drivers halfway through the operation is not supported. + * ID values are auto-generated in psa_driver_wrappers.h + * ID value zero means the context is not valid or not assigned to + * any driver (i.e. none of the driver contexts are active). */ + unsigned int MBEDTLS_PRIVATE(id); + uint8_t MBEDTLS_PRIVATE(mac_size); + unsigned int MBEDTLS_PRIVATE(is_sign) : 1; + psa_driver_mac_context_t MBEDTLS_PRIVATE(ctx); +}; + +#define PSA_MAC_OPERATION_INIT { 0, 0, 0, { 0 } } +static inline struct psa_mac_operation_s psa_mac_operation_init( void ) +{ + const struct psa_mac_operation_s v = PSA_MAC_OPERATION_INIT; + return( v ); +} + +struct psa_aead_operation_s +{ + + /** Unique ID indicating which driver got assigned to do the + * operation. Since driver contexts are driver-specific, swapping + * drivers halfway through the operation is not supported. + * ID values are auto-generated in psa_crypto_driver_wrappers.h + * ID value zero means the context is not valid or not assigned to + * any driver (i.e. none of the driver contexts are active). */ + unsigned int MBEDTLS_PRIVATE(id); + + psa_algorithm_t MBEDTLS_PRIVATE(alg); + psa_key_type_t MBEDTLS_PRIVATE(key_type); + + size_t MBEDTLS_PRIVATE(ad_remaining); + size_t MBEDTLS_PRIVATE(body_remaining); + + unsigned int MBEDTLS_PRIVATE(nonce_set) : 1; + unsigned int MBEDTLS_PRIVATE(lengths_set) : 1; + unsigned int MBEDTLS_PRIVATE(ad_started) : 1; + unsigned int MBEDTLS_PRIVATE(body_started) : 1; + unsigned int MBEDTLS_PRIVATE(is_encrypt) : 1; + + psa_driver_aead_context_t MBEDTLS_PRIVATE(ctx); +}; + +#define PSA_AEAD_OPERATION_INIT {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0}} +static inline struct psa_aead_operation_s psa_aead_operation_init( void ) +{ + const struct psa_aead_operation_s v = PSA_AEAD_OPERATION_INIT; + return( v ); +} + +#if defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF) || \ + defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXTRACT) || \ + defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXPAND) +typedef struct +{ + uint8_t *MBEDTLS_PRIVATE(info); + size_t MBEDTLS_PRIVATE(info_length); +#if PSA_HASH_MAX_SIZE > 0xff +#error "PSA_HASH_MAX_SIZE does not fit in uint8_t" +#endif + uint8_t MBEDTLS_PRIVATE(offset_in_block); + uint8_t MBEDTLS_PRIVATE(block_number); + unsigned int MBEDTLS_PRIVATE(state) : 2; + unsigned int MBEDTLS_PRIVATE(info_set) : 1; + uint8_t MBEDTLS_PRIVATE(output_block)[PSA_HASH_MAX_SIZE]; + uint8_t MBEDTLS_PRIVATE(prk)[PSA_HASH_MAX_SIZE]; + struct psa_mac_operation_s MBEDTLS_PRIVATE(hmac); +} psa_hkdf_key_derivation_t; +#endif /* MBEDTLS_PSA_BUILTIN_ALG_HKDF || + MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXTRACT || + MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXPAND */ +#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_ECJPAKE_TO_PMS) +typedef struct +{ + uint8_t MBEDTLS_PRIVATE(data)[PSA_TLS12_ECJPAKE_TO_PMS_DATA_SIZE]; +} psa_tls12_ecjpake_to_pms_t; +#endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_ECJPAKE_TO_PMS */ + +#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) || \ + defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS) +typedef enum +{ + PSA_TLS12_PRF_STATE_INIT, /* no input provided */ + PSA_TLS12_PRF_STATE_SEED_SET, /* seed has been set */ + PSA_TLS12_PRF_STATE_OTHER_KEY_SET, /* other key has been set - optional */ + PSA_TLS12_PRF_STATE_KEY_SET, /* key has been set */ + PSA_TLS12_PRF_STATE_LABEL_SET, /* label has been set */ + PSA_TLS12_PRF_STATE_OUTPUT /* output has been started */ +} psa_tls12_prf_key_derivation_state_t; + +typedef struct psa_tls12_prf_key_derivation_s +{ +#if PSA_HASH_MAX_SIZE > 0xff +#error "PSA_HASH_MAX_SIZE does not fit in uint8_t" +#endif + + /* Indicates how many bytes in the current HMAC block have + * not yet been read by the user. */ + uint8_t MBEDTLS_PRIVATE(left_in_block); + + /* The 1-based number of the block. */ + uint8_t MBEDTLS_PRIVATE(block_number); + + psa_tls12_prf_key_derivation_state_t MBEDTLS_PRIVATE(state); + + uint8_t *MBEDTLS_PRIVATE(secret); + size_t MBEDTLS_PRIVATE(secret_length); + uint8_t *MBEDTLS_PRIVATE(seed); + size_t MBEDTLS_PRIVATE(seed_length); + uint8_t *MBEDTLS_PRIVATE(label); + size_t MBEDTLS_PRIVATE(label_length); +#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS) + uint8_t *MBEDTLS_PRIVATE(other_secret); + size_t MBEDTLS_PRIVATE(other_secret_length); +#endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS */ + + uint8_t MBEDTLS_PRIVATE(Ai)[PSA_HASH_MAX_SIZE]; + + /* `HMAC_hash( prk, A( i ) + seed )` in the notation of RFC 5246, Sect. 5. */ + uint8_t MBEDTLS_PRIVATE(output_block)[PSA_HASH_MAX_SIZE]; +} psa_tls12_prf_key_derivation_t; +#endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) || + * MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS */ + +struct psa_key_derivation_s +{ + psa_algorithm_t MBEDTLS_PRIVATE(alg); + unsigned int MBEDTLS_PRIVATE(can_output_key) : 1; + size_t MBEDTLS_PRIVATE(capacity); + union + { + /* Make the union non-empty even with no supported algorithms. */ + uint8_t MBEDTLS_PRIVATE(dummy); +#if defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF) || \ + defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXTRACT) || \ + defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXPAND) + psa_hkdf_key_derivation_t MBEDTLS_PRIVATE(hkdf); +#endif +#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) || \ + defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS) + psa_tls12_prf_key_derivation_t MBEDTLS_PRIVATE(tls12_prf); +#endif +#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_ECJPAKE_TO_PMS) + psa_tls12_ecjpake_to_pms_t MBEDTLS_PRIVATE(tls12_ecjpake_to_pms); +#endif + } MBEDTLS_PRIVATE(ctx); +}; + +/* This only zeroes out the first byte in the union, the rest is unspecified. */ +#define PSA_KEY_DERIVATION_OPERATION_INIT { 0, 0, 0, { 0 } } +static inline struct psa_key_derivation_s psa_key_derivation_operation_init( + void ) +{ + const struct psa_key_derivation_s v = PSA_KEY_DERIVATION_OPERATION_INIT; + return( v ); +} + +struct psa_key_policy_s +{ + psa_key_usage_t MBEDTLS_PRIVATE(usage); + psa_algorithm_t MBEDTLS_PRIVATE(alg); + psa_algorithm_t MBEDTLS_PRIVATE(alg2); +}; +typedef struct psa_key_policy_s psa_key_policy_t; + +#define PSA_KEY_POLICY_INIT { 0, 0, 0 } +static inline struct psa_key_policy_s psa_key_policy_init( void ) +{ + const struct psa_key_policy_s v = PSA_KEY_POLICY_INIT; + return( v ); +} + +/* The type used internally for key sizes. + * Public interfaces use size_t, but internally we use a smaller type. */ +typedef uint16_t psa_key_bits_t; +/* The maximum value of the type used to represent bit-sizes. + * This is used to mark an invalid key size. */ +#define PSA_KEY_BITS_TOO_LARGE ( ( psa_key_bits_t ) -1 ) +/* The maximum size of a key in bits. + * Currently defined as the maximum that can be represented, rounded down + * to a whole number of bytes. + * This is an uncast value so that it can be used in preprocessor + * conditionals. */ +#define PSA_MAX_KEY_BITS 0xfff8 + +/** A mask of flags that can be stored in key attributes. + * + * This type is also used internally to store flags in slots. Internal + * flags are defined in library/psa_crypto_core.h. Internal flags may have + * the same value as external flags if they are properly handled during + * key creation and in psa_get_key_attributes. + */ +typedef uint16_t psa_key_attributes_flag_t; + +#define MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER \ + ( (psa_key_attributes_flag_t) 0x0001 ) + +/* A mask of key attribute flags used externally only. + * Only meant for internal checks inside the library. */ +#define MBEDTLS_PSA_KA_MASK_EXTERNAL_ONLY ( \ + MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER | \ + 0 ) + +/* A mask of key attribute flags used both internally and externally. + * Currently there aren't any. */ +#define MBEDTLS_PSA_KA_MASK_DUAL_USE ( \ + 0 ) + +typedef struct +{ + psa_key_type_t MBEDTLS_PRIVATE(type); + psa_key_bits_t MBEDTLS_PRIVATE(bits); + psa_key_lifetime_t MBEDTLS_PRIVATE(lifetime); + mbedtls_svc_key_id_t MBEDTLS_PRIVATE(id); + psa_key_policy_t MBEDTLS_PRIVATE(policy); + psa_key_attributes_flag_t MBEDTLS_PRIVATE(flags); +} psa_core_key_attributes_t; + +#define PSA_CORE_KEY_ATTRIBUTES_INIT { PSA_KEY_TYPE_NONE, 0, \ + PSA_KEY_LIFETIME_VOLATILE, \ + MBEDTLS_SVC_KEY_ID_INIT, \ + PSA_KEY_POLICY_INIT, 0 } + +struct psa_key_attributes_s +{ + psa_core_key_attributes_t MBEDTLS_PRIVATE(core); +#if defined(MBEDTLS_PSA_CRYPTO_SE_C) + psa_key_slot_number_t MBEDTLS_PRIVATE(slot_number); +#endif /* MBEDTLS_PSA_CRYPTO_SE_C */ + void *MBEDTLS_PRIVATE(domain_parameters); + size_t MBEDTLS_PRIVATE(domain_parameters_size); +}; + +#if defined(MBEDTLS_PSA_CRYPTO_SE_C) +#define PSA_KEY_ATTRIBUTES_INIT { PSA_CORE_KEY_ATTRIBUTES_INIT, 0, NULL, 0 } +#else +#define PSA_KEY_ATTRIBUTES_INIT { PSA_CORE_KEY_ATTRIBUTES_INIT, NULL, 0 } +#endif + +static inline struct psa_key_attributes_s psa_key_attributes_init( void ) +{ + const struct psa_key_attributes_s v = PSA_KEY_ATTRIBUTES_INIT; + return( v ); +} + +static inline void psa_set_key_id( psa_key_attributes_t *attributes, + mbedtls_svc_key_id_t key ) +{ + psa_key_lifetime_t lifetime = attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime); + + attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id) = key; + + if( PSA_KEY_LIFETIME_IS_VOLATILE( lifetime ) ) + { + attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime) = + PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION( + PSA_KEY_LIFETIME_PERSISTENT, + PSA_KEY_LIFETIME_GET_LOCATION( lifetime ) ); + } +} + +static inline mbedtls_svc_key_id_t psa_get_key_id( + const psa_key_attributes_t *attributes ) +{ + return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id) ); +} + +#ifdef MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER +static inline void mbedtls_set_key_owner_id( psa_key_attributes_t *attributes, + mbedtls_key_owner_id_t owner ) +{ + attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id).MBEDTLS_PRIVATE(owner) = owner; +} +#endif + +static inline void psa_set_key_lifetime( psa_key_attributes_t *attributes, + psa_key_lifetime_t lifetime ) +{ + attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime) = lifetime; + if( PSA_KEY_LIFETIME_IS_VOLATILE( lifetime ) ) + { +#ifdef MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER + attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id).MBEDTLS_PRIVATE(key_id) = 0; +#else + 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 */ |