mbedtls/include/psa/crypto_struct.h
Gilles Peskine 0c77b0e2f9
Merge pull request #198 from gilles-peskine-arm/psa-api-1.0-beta-merge_development_20190801
Merge mbed-crypto/development into psa-api-1.0-beta
2019-08-08 10:24:53 +02:00

450 lines
13 KiB
C

/**
* \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.
*/
/*
* Copyright (C) 2018, ARM Limited, All Rights Reserved
* 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.
*
* This file is part of mbed TLS (https://tls.mbed.org)
*/
#ifndef PSA_CRYPTO_STRUCT_H
#define PSA_CRYPTO_STRUCT_H
/* Include the Mbed TLS configuration file, the way Mbed TLS does it
* in each of its header files. */
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#include "mbedtls/cipher.h"
#include "mbedtls/cmac.h"
#include "mbedtls/gcm.h"
#include "mbedtls/md.h"
#include "mbedtls/md2.h"
#include "mbedtls/md4.h"
#include "mbedtls/md5.h"
#include "mbedtls/ripemd160.h"
#include "mbedtls/sha1.h"
#include "mbedtls/sha256.h"
#include "mbedtls/sha512.h"
struct psa_hash_operation_s
{
psa_algorithm_t alg;
union
{
unsigned dummy; /* Make the union non-empty even with no supported algorithms. */
#if defined(MBEDTLS_MD2_C)
mbedtls_md2_context md2;
#endif
#if defined(MBEDTLS_MD4_C)
mbedtls_md4_context md4;
#endif
#if defined(MBEDTLS_MD5_C)
mbedtls_md5_context md5;
#endif
#if defined(MBEDTLS_RIPEMD160_C)
mbedtls_ripemd160_context ripemd160;
#endif
#if defined(MBEDTLS_SHA1_C)
mbedtls_sha1_context sha1;
#endif
#if defined(MBEDTLS_SHA256_C)
mbedtls_sha256_context sha256;
#endif
#if defined(MBEDTLS_SHA512_C)
mbedtls_sha512_context sha512;
#endif
} 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 );
}
#if defined(MBEDTLS_MD_C)
typedef struct
{
/** The hash context. */
struct psa_hash_operation_s hash_ctx;
/** The HMAC part of the context. */
uint8_t opad[PSA_HMAC_MAX_HASH_BLOCK_SIZE];
} psa_hmac_internal_data;
#endif /* MBEDTLS_MD_C */
struct psa_mac_operation_s
{
psa_algorithm_t alg;
unsigned int key_set : 1;
unsigned int iv_required : 1;
unsigned int iv_set : 1;
unsigned int has_input : 1;
unsigned int is_sign : 1;
uint8_t mac_size;
union
{
unsigned dummy; /* Make the union non-empty even with no supported algorithms. */
#if defined(MBEDTLS_MD_C)
psa_hmac_internal_data hmac;
#endif
#if defined(MBEDTLS_CMAC_C)
mbedtls_cipher_context_t cmac;
#endif
} ctx;
};
#define PSA_MAC_OPERATION_INIT {0, 0, 0, 0, 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_cipher_operation_s
{
psa_algorithm_t alg;
unsigned int key_set : 1;
unsigned int iv_required : 1;
unsigned int iv_set : 1;
uint8_t iv_size;
uint8_t block_size;
union
{
unsigned dummy; /* Enable easier initializing of the union. */
mbedtls_cipher_context_t cipher;
} ctx;
};
#define PSA_CIPHER_OPERATION_INIT {0, 0, 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 );
}
struct psa_aead_operation_s
{
psa_algorithm_t alg;
unsigned int key_set : 1;
unsigned int iv_set : 1;
uint8_t iv_size;
uint8_t block_size;
union
{
unsigned dummy; /* Enable easier initializing of the union. */
mbedtls_cipher_context_t cipher;
} ctx;
};
#define PSA_AEAD_OPERATION_INIT {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_MD_C)
typedef struct
{
uint8_t *info;
size_t info_length;
psa_hmac_internal_data hmac;
uint8_t prk[PSA_HASH_MAX_SIZE];
uint8_t output_block[PSA_HASH_MAX_SIZE];
#if PSA_HASH_MAX_SIZE > 0xff
#error "PSA_HASH_MAX_SIZE does not fit in uint8_t"
#endif
uint8_t offset_in_block;
uint8_t block_number;
unsigned int state : 2;
unsigned int info_set : 1;
} psa_hkdf_key_derivation_t;
#endif /* MBEDTLS_MD_C */
/*
* If this option is not turned on, then the function `psa_key_derivation()`
* is removed. And the new psa_tls12_prf_key_derivation_t context is used along
* with the corresponding new API.
*
* The sole purpose of this option is to make the transition to the new API
* smoother. Once the transition is complete it can and should be removed
* along with the old API and its implementation.
*/
#define PSA_PRE_1_0_KEY_DERIVATION
#if defined(MBEDTLS_MD_C)
#if defined(PSA_PRE_1_0_KEY_DERIVATION)
typedef struct psa_tls12_prf_key_derivation_s
{
/* The TLS 1.2 PRF uses the key for each HMAC iteration,
* hence we must store it for the lifetime of the operation.
* This is different from HKDF, where the key is only used
* in the extraction phase, but not during expansion. */
uint8_t *key;
size_t key_len;
/* `A(i) + seed` in the notation of RFC 5246, Sect. 5 */
uint8_t *Ai_with_seed;
size_t Ai_with_seed_len;
/* `HMAC_hash( prk, A(i) + seed )` in the notation of RFC 5246, Sect. 5. */
uint8_t output_block[PSA_HASH_MAX_SIZE];
#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
* already been read by the user. */
uint8_t offset_in_block;
/* The 1-based number of the block. */
uint8_t block_number;
} psa_tls12_prf_key_derivation_t;
#else
typedef enum
{
TLS12_PRF_STATE_INIT, /* no input provided */
TLS12_PRF_STATE_SEED_SET, /* seed has been set */
TLS12_PRF_STATE_KEY_SET, /* key has been set */
TLS12_PRF_STATE_LABEL_SET, /* label has been set */
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 left_in_block;
/* The 1-based number of the block. */
uint8_t block_number;
psa_tls12_prf_key_derivation_state_t state;
uint8_t *seed;
size_t seed_length;
uint8_t *label;
size_t label_length;
psa_hmac_internal_data hmac;
uint8_t Ai[PSA_HASH_MAX_SIZE];
/* `HMAC_hash( prk, A(i) + seed )` in the notation of RFC 5246, Sect. 5. */
uint8_t output_block[PSA_HASH_MAX_SIZE];
} psa_tls12_prf_key_derivation_t;
#endif /* PSA_PRE_1_0_KEY_DERIVATION */
#endif /* MBEDTLS_MD_C */
struct psa_key_derivation_s
{
psa_algorithm_t alg;
size_t capacity;
union
{
/* Make the union non-empty even with no supported algorithms. */
uint8_t dummy;
#if defined(MBEDTLS_MD_C)
psa_hkdf_key_derivation_t hkdf;
psa_tls12_prf_key_derivation_t tls12_prf;
#endif
} ctx;
};
/* This only zeroes out the first byte in the union, the rest is unspecified. */
#define PSA_KEY_DERIVATION_OPERATION_INIT {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 usage;
psa_algorithm_t alg;
psa_algorithm_t 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
typedef struct
{
psa_key_type_t type;
psa_key_lifetime_t lifetime;
psa_key_id_t id;
psa_key_policy_t policy;
psa_key_bits_t bits;
uint16_t flags;
} psa_core_key_attributes_t;
#define PSA_CORE_KEY_ATTRIBUTES_INIT {0, 0, 0, {0, 0, 0}, 0, 0}
struct psa_key_attributes_s
{
psa_core_key_attributes_t core;
void *domain_parameters;
size_t domain_parameters_size;
};
#define PSA_KEY_ATTRIBUTES_INIT {PSA_CORE_KEY_ATTRIBUTES_INIT, NULL, 0}
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,
psa_key_id_t id)
{
attributes->core.id = id;
if( attributes->core.lifetime == PSA_KEY_LIFETIME_VOLATILE )
attributes->core.lifetime = PSA_KEY_LIFETIME_PERSISTENT;
}
static inline psa_key_id_t psa_get_key_id(
const psa_key_attributes_t *attributes)
{
return( attributes->core.id );
}
static inline void psa_set_key_lifetime(psa_key_attributes_t *attributes,
psa_key_lifetime_t lifetime)
{
attributes->core.lifetime = lifetime;
if( lifetime == PSA_KEY_LIFETIME_VOLATILE )
attributes->core.id = 0;
}
static inline psa_key_lifetime_t psa_get_key_lifetime(
const psa_key_attributes_t *attributes)
{
return( attributes->core.lifetime );
}
static inline void psa_set_key_usage_flags(psa_key_attributes_t *attributes,
psa_key_usage_t usage_flags)
{
attributes->core.policy.usage = usage_flags;
}
static inline psa_key_usage_t psa_get_key_usage_flags(
const psa_key_attributes_t *attributes)
{
return( attributes->core.policy.usage );
}
static inline void psa_set_key_algorithm(psa_key_attributes_t *attributes,
psa_algorithm_t alg)
{
attributes->core.policy.alg = alg;
}
static inline psa_algorithm_t psa_get_key_algorithm(
const psa_key_attributes_t *attributes)
{
return( attributes->core.policy.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->domain_parameters == NULL )
{
/* Common case: quick path */
attributes->core.type = type;
}
else
{
/* Call the bigger function to free the old domain paramteres.
* 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->core.type );
}
static inline void psa_set_key_bits(psa_key_attributes_t *attributes,
size_t bits)
{
if( bits > PSA_MAX_KEY_BITS )
attributes->core.bits = PSA_KEY_BITS_TOO_LARGE;
else
attributes->core.bits = (psa_key_bits_t) bits;
}
static inline size_t psa_get_key_bits(
const psa_key_attributes_t *attributes)
{
return( attributes->core.bits );
}
#endif /* PSA_CRYPTO_STRUCT_H */