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Move ECP key generation code to the PSA ECP specific C file

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Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2020-11-20 18:17:42 +01:00
parent 3a9c46b184
commit 7023db5273
3 changed files with 74 additions and 32 deletions
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37
library/psa_crypto.c
View File

@ -34,6 +34,7 @@
#include "psa_crypto_driver_wrappers.h"
#include "psa_crypto_ecp.h"
#include "psa_crypto_rsa.h"
#include "psa_crypto_ecp.h"
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
#include "psa_crypto_se.h"
#endif
@ -6053,38 +6054,10 @@ psa_status_t psa_generate_key_internal(
#if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR)
if ( PSA_KEY_TYPE_IS_ECC( type ) && PSA_KEY_TYPE_IS_KEY_PAIR( type ) )
{
psa_ecc_family_t curve = PSA_KEY_TYPE_ECC_GET_FAMILY( type );
mbedtls_ecp_group_id grp_id =
mbedtls_ecc_group_of_psa( curve, attributes->core.bits, 0 );
const mbedtls_ecp_curve_info *curve_info =
mbedtls_ecp_curve_info_from_grp_id( grp_id );
mbedtls_ecp_keypair ecp;
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
if( attributes->domain_parameters_size != 0 )
return( PSA_ERROR_NOT_SUPPORTED );
if( grp_id == MBEDTLS_ECP_DP_NONE || curve_info == NULL )
return( PSA_ERROR_NOT_SUPPORTED );
mbedtls_ecp_keypair_init( &ecp );
ret = mbedtls_ecp_gen_key( grp_id, &ecp,
mbedtls_psa_get_random,
MBEDTLS_PSA_RANDOM_STATE );
if( ret != 0 )
{
mbedtls_ecp_keypair_free( &ecp );
return( mbedtls_to_psa_error( ret ) );
}
status = mbedtls_to_psa_error(
mbedtls_ecp_write_key( &ecp, key_buffer, key_buffer_size ) );
mbedtls_ecp_keypair_free( &ecp );
if( status == PSA_SUCCESS )
*key_buffer_length = key_buffer_size;
return( status );
return( mbedtls_psa_ecp_generate_key( attributes,
key_buffer,
key_buffer_size,
key_buffer_length ) );
}
else
#endif /* defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR) */

46
library/psa_crypto_ecp.c
View File

@ -292,6 +292,52 @@ static psa_status_t ecp_export_public_key(
#endif /* defined(BUILTIN_KEY_TYPE_ECC_KEY_PAIR) ||
* defined(BUILTIN_KEY_TYPE_ECC_PUBLIC_KEY) */
#if defined(BUILTIN_KEY_TYPE_ECC_KEY_PAIR)
psa_status_t mbedtls_psa_ecp_generate_key(
const psa_key_attributes_t *attributes,
uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length )
{
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
psa_ecc_family_t curve = PSA_KEY_TYPE_ECC_GET_FAMILY(
attributes->core.type );
mbedtls_ecp_group_id grp_id =
mbedtls_ecc_group_of_psa( curve, attributes->core.bits, 0 );
const mbedtls_ecp_curve_info *curve_info =
mbedtls_ecp_curve_info_from_grp_id( grp_id );
mbedtls_ecp_keypair ecp;
if( attributes->domain_parameters_size != 0 )
return( PSA_ERROR_NOT_SUPPORTED );
if( grp_id == MBEDTLS_ECP_DP_NONE || curve_info == NULL )
return( PSA_ERROR_NOT_SUPPORTED );
mbedtls_ecp_keypair_init( &ecp );
ret = mbedtls_ecp_gen_key( grp_id, &ecp,
mbedtls_psa_get_random,
MBEDTLS_PSA_RANDOM_STATE );
if( ret != 0 )
{
mbedtls_ecp_keypair_free( &ecp );
return( mbedtls_to_psa_error( ret ) );
}
status = mbedtls_to_psa_error(
mbedtls_ecp_write_key( &ecp, key_buffer, key_buffer_size ) );
mbedtls_ecp_keypair_free( &ecp );
if( status == PSA_SUCCESS )
*key_buffer_length = key_buffer_size;
return( status );
}
#endif /* defined(BUILTIN_KEY_TYPE_ECC_KEY_PAIR) */
#if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR) || \
defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_PUBLIC_KEY)

23
library/psa_crypto_ecp.h
View File

@ -123,6 +123,29 @@ psa_status_t mbedtls_psa_ecp_export_public_key(
const uint8_t *key_buffer, size_t key_buffer_size,
uint8_t *data, size_t data_size, size_t *data_length );
/**
* \brief Generate an ECP key.
*
* \note The signature of the function is that of a PSA driver generate_key
* entry point.
*
* \param[in] attributes The attributes for the ECP key to generate.
* \param[out] key_buffer Buffer where the key data is to be written.
* \param[in] key_buffer_size Size of \p key_buffer in bytes.
* \param[out] key_buffer_length On success, the number of bytes written in
* \p key_buffer.
*
* \retval #PSA_SUCCESS
* The key was successfully generated.
* \retval #PSA_ERROR_NOT_SUPPORTED
* Key length or type not supported.
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of \p key_buffer is too small.
*/
psa_status_t mbedtls_psa_ecp_generate_key(
const psa_key_attributes_t *attributes,
uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length );
/*
* BEYOND THIS POINT, TEST DRIVER ENTRY POINTS ONLY.
*/