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Expose mbedtls/psa curve identifier conversions from psa_crypto.c

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This commit is contained in:
Gilles Peskine 2019-12-12 17:49:31 +01:00
parent 4295e8b9c5
commit 5055b239bf
2 changed files with 48 additions and 4 deletions
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44
include/psa/crypto_extra.h
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@ -560,6 +560,50 @@ psa_status_t psa_get_key_domain_parameters(
/**@}*/ /**@}*/
/** \defgroup psa_tls_helpers TLS helper functions
* @{
*/
#if defined(MBEDTLS_ECP_C)
#include <mbedtls/ecp.h>
/** Convert an ECC curve identifier from the Mbed TLS encoding to PSA.
*
* \note This function is provided solely for the convenience of
* Mbed TLS and may be removed at any time without notice.
*
* \param grpid An Mbed TLS elliptic curve identifier
* (`MBEDTLS_ECP_DP_xxx`).
* \param[out] bits On success, the bit size of the curve.
*
* \return The corresponding PSA elliptic curve identifier
* (`PSA_ECC_CURVE_xxx`).
* \return \c 0 on failure (\p grpid is not recognized).
*/
psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid,
size_t *bits );
/** Convert an ECC curve identifier from the PSA encoding to Mbed TLS.
*
* \note This function is provided solely for the convenience of
* Mbed TLS and may be removed at any time without notice.
*
* \param curve A PSA elliptic curve identifier
* (`PSA_ECC_CURVE_xxx`).
* \param byte_length The byte-length of a private key on \p curve.
*
* \return The corresponding Mbed TLS elliptic curve identifier
* (`MBEDTLS_ECP_DP_xxx`).
* \return #MBEDTLS_ECP_DP_NONE if \c curve is not recognized.
* \return #MBEDTLS_ECP_DP_NONE if \p byte_length is not
* correct for \p curve.
*/
mbedtls_ecp_group_id mbedtls_ecc_group_of_psa( psa_ecc_curve_t curve,
size_t byte_length );
#endif /* MBEDTLS_ECP_C */
/**@}*/
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif

4
library/psa_crypto.c
View file

@ -375,7 +375,7 @@ static inline int psa_key_slot_is_external( const psa_key_slot_t *slot )
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */ #endif /* MBEDTLS_PSA_CRYPTO_SE_C */
#if defined(MBEDTLS_ECP_C) #if defined(MBEDTLS_ECP_C)
static psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid, psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid,
size_t *bits ) size_t *bits )
{ {
switch( grpid ) switch( grpid )
@ -424,7 +424,7 @@ static psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid,
} }
} }
static mbedtls_ecp_group_id mbedtls_ecc_group_of_psa( psa_ecc_curve_t curve, mbedtls_ecp_group_id mbedtls_ecc_group_of_psa( psa_ecc_curve_t curve,
size_t byte_length ) size_t byte_length )
{ {
(void) byte_length; (void) byte_length;