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pk/psa: use PSA guard for mbedtls_ecc_group_to_psa() and mbedtls_ecc_group_of_psa()

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This allows also to:
- removing the dependency on ECP_C for these functions and only rely
  on PSA symbols
- removing extra header inclusing from crypto_extra.h
- return MBEDTLS_PK_USE_PSA_EC_DATA and MBEDTLS_PK_HAVE_ECC_KEYS to
  their original position in pk.h

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti 2023-06-19 13:39:54 +02:00
parent bc2b1d3288
commit a9aab1a85b
3 changed files with 33 additions and 34 deletions
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58
include/mbedtls/pk.h
View File

@ -40,35 +40,6 @@
#include "mbedtls/ecdsa.h"
#endif
/* Internal helper to define which fields in the pk_context structure below
* should be used for EC keys: legacy ecp_keypair or the raw (PSA friendly)
* format. It should be noticed that this only affect how data is stored, not
* which functions are used for various operations. The overall picture looks
* like this:
* - if USE_PSA is not defined and ECP_C is then use ecp_keypair data structure
* and legacy functions
* - if USE_PSA is defined and
* - if ECP_C then use ecp_keypair structure, convert data to a PSA friendly
* format and use PSA functions
* - if !ECP_C then use new raw data and PSA functions directly.
*
* The main reason for the "intermediate" (USE_PSA + ECP_C) above is that as long
* as ECP_C is defined mbedtls_pk_ec() gives the user a read/write access to the
* ecp_keypair structure inside the pk_context so he/she can modify it using
* ECP functions which are not under PK module's control.
*/
#if defined(MBEDTLS_USE_PSA_CRYPTO) && defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY) && \
!defined(MBEDTLS_ECP_C)
#define MBEDTLS_PK_USE_PSA_EC_DATA
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_ECP_C */
/* Helper symbol to state that the PK module has support for EC keys. This
* can either be provided through the legacy ECP solution or through the
* PSA friendly MBEDTLS_PK_USE_PSA_EC_DATA. */
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA) || defined(MBEDTLS_ECP_C)
#define MBEDTLS_PK_HAVE_ECC_KEYS
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA || MBEDTLS_ECP_C */
#if defined(MBEDTLS_USE_PSA_CRYPTO) || defined(MBEDTLS_PSA_CRYPTO_C)
#include "psa/crypto.h"
#endif
@ -231,6 +202,35 @@ typedef struct mbedtls_pk_rsassa_pss_options {
#define MBEDTLS_PK_CAN_ECDH
#endif
/* Internal helper to define which fields in the pk_context structure below
* should be used for EC keys: legacy ecp_keypair or the raw (PSA friendly)
* format. It should be noticed that this only affect how data is stored, not
* which functions are used for various operations. The overall picture looks
* like this:
* - if USE_PSA is not defined and ECP_C is then use ecp_keypair data structure
* and legacy functions
* - if USE_PSA is defined and
* - if ECP_C then use ecp_keypair structure, convert data to a PSA friendly
* format and use PSA functions
* - if !ECP_C then use new raw data and PSA functions directly.
*
* The main reason for the "intermediate" (USE_PSA + ECP_C) above is that as long
* as ECP_C is defined mbedtls_pk_ec() gives the user a read/write access to the
* ecp_keypair structure inside the pk_context so he/she can modify it using
* ECP functions which are not under PK module's control.
*/
#if defined(MBEDTLS_USE_PSA_CRYPTO) && defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY) && \
!defined(MBEDTLS_ECP_C)
#define MBEDTLS_PK_USE_PSA_EC_DATA
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_ECP_C */
/* Helper symbol to state that the PK module has support for EC keys. This
* can either be provided through the legacy ECP solution or through the
* PSA friendly MBEDTLS_PK_USE_PSA_EC_DATA. */
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA) || defined(MBEDTLS_ECP_C)
#define MBEDTLS_PK_HAVE_ECC_KEYS
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA || MBEDTLS_ECP_C */
/**
* \brief Types for interfacing with the debug module
*/

5
include/psa/crypto_extra.h
View File

@ -572,8 +572,7 @@ psa_status_t psa_get_key_domain_parameters(
/** \defgroup psa_tls_helpers TLS helper functions
* @{
*/
#include <mbedtls/pk.h>
#if defined(MBEDTLS_PK_HAVE_ECC_KEYS)
#if defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY)
#include <mbedtls/ecp.h>
/** Convert an ECC curve identifier from the Mbed TLS encoding to PSA.
@ -614,7 +613,7 @@ psa_ecc_family_t mbedtls_ecc_group_to_psa(mbedtls_ecp_group_id grpid,
mbedtls_ecp_group_id mbedtls_ecc_group_of_psa(psa_ecc_family_t curve,
size_t bits,
int bits_is_sloppy);
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */
#endif /* PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY */
/**@}*/

4
library/psa_crypto.c
View File

@ -390,7 +390,7 @@ static void psa_wipe_tag_output_buffer(uint8_t *output_buffer, psa_status_t stat
/* Key management */
/****************************************************************/
#if defined(MBEDTLS_PK_HAVE_ECC_KEYS)
#if defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY)
psa_ecc_family_t mbedtls_ecc_group_to_psa(mbedtls_ecp_group_id grpid,
size_t *bits)
{
@ -531,7 +531,7 @@ mbedtls_ecp_group_id mbedtls_ecc_group_of_psa(psa_ecc_family_t curve,
(void) bits_is_sloppy;
return MBEDTLS_ECP_DP_NONE;
}
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */
#endif /* PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY */
psa_status_t psa_validate_unstructured_key_bit_size(psa_key_type_t type,
size_t bits)