mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-26 02:05:39 +01:00
Convert load_xxx_representation to take buffers instead of a whole slot
Avoids stack-allocating a key slot during ECDH, and mock-attaching a key to a key slot during key import. Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
This commit is contained in:
Steven Cooreman
parent
6d839f05bf
commit
7f39187d6b
@ -518,15 +518,19 @@ static psa_status_t psa_check_rsa_key_byte_aligned(
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}
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#endif /* MBEDTLS_PK_PARSE_C */
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/** Load the contents of a key slot into an internal RSA representation
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/** Load the contents of a key buffer into an internal RSA representation
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*
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* \param[in] slot The slot from which to load the representation
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* \param[in] buffer The buffer from which to load the representation.
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* \param[in] size The size in bytes of \p buffer.
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* \param[in] type The type of key contained in the \p buffer.
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* \param[out] p_rsa Returns a pointer to an RSA context on success.
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* The caller is responsible for freeing both the
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* contents of the context and the context itself
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* when done.
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*/
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static psa_status_t psa_load_rsa_representation( const psa_key_slot_t *slot,
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static psa_status_t psa_load_rsa_representation( const uint8_t *buffer,
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size_t size,
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psa_key_type_t type,
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mbedtls_rsa_context **p_rsa )
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{
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#if defined(MBEDTLS_PK_PARSE_C)
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@ -536,12 +540,12 @@ static psa_status_t psa_load_rsa_representation( const psa_key_slot_t *slot,
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mbedtls_pk_init( &ctx );
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/* Parse the data. */
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if( PSA_KEY_TYPE_IS_KEY_PAIR( slot->attr.type ) )
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if( PSA_KEY_TYPE_IS_KEY_PAIR( type ) )
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status = mbedtls_to_psa_error(
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mbedtls_pk_parse_key( &ctx, slot->data.key.data, slot->data.key.bytes, NULL, 0 ) );
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mbedtls_pk_parse_key( &ctx, buffer, size, NULL, 0 ) );
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else
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status = mbedtls_to_psa_error(
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mbedtls_pk_parse_public_key( &ctx, slot->data.key.data, slot->data.key.bytes ) );
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mbedtls_pk_parse_public_key( &ctx, buffer, size ) );
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if( status != PSA_SUCCESS )
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goto exit;
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@ -576,7 +580,9 @@ exit:
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mbedtls_pk_free( &ctx );
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return( status );
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#else
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(void) slot;
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(void) buffer;
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(void) size;
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(void) type;
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(void) rsa;
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return( PSA_ERROR_NOT_SUPPORTED );
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#endif /* MBEDTLS_PK_PARSE_C */
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@ -656,14 +662,11 @@ static psa_status_t psa_import_rsa_key( psa_key_slot_t *slot,
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uint8_t* output = NULL;
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mbedtls_rsa_context *rsa = NULL;
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/* Temporarily load input into slot. The cast here is safe since it'll
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* only be used for load_rsa_representation, which doesn't modify the
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* buffer. */
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slot->data.key.data = (uint8_t *)data;
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slot->data.key.bytes = data_length;
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/* Parse input */
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status = psa_load_rsa_representation( slot, &rsa );
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status = psa_load_rsa_representation( data,
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data_length,
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slot->attr.type,
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&rsa );
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if( status != PSA_SUCCESS )
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goto exit;
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@ -711,23 +714,27 @@ exit:
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#endif /* defined(MBEDTLS_RSA_C) */
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#if defined(MBEDTLS_ECP_C)
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/** Load the contents of a key slot into an internal ECP representation
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/** Load the contents of a key buffer into an internal ECP representation
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*
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* \param[in] slot The slot from which to load the representation
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* \param[in] buffer The buffer from which to load the representation.
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* \param[in] size The size in bytes of \p buffer.
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* \param[in] type The type of key contained in the \p buffer.
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* \param[out] p_ecp Returns a pointer to an ECP context on success.
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* The caller is responsible for freeing both the
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* contents of the context and the context itself
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* when done.
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*/
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static psa_status_t psa_load_ecp_representation( const psa_key_slot_t *slot,
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static psa_status_t psa_load_ecp_representation( const uint8_t *buffer,
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size_t size,
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psa_key_type_t type,
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mbedtls_ecp_keypair **p_ecp )
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{
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mbedtls_ecp_group_id grp_id = MBEDTLS_ECP_DP_NONE;
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size_t data_length = slot->data.key.bytes;
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psa_status_t status;
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mbedtls_ecp_keypair *ecp = NULL;
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size_t curve_size = size;
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if( PSA_KEY_TYPE_IS_PUBLIC_KEY( slot->attr.type ) )
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if( PSA_KEY_TYPE_IS_PUBLIC_KEY( type ) )
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{
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/* A public key is represented as:
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* - The byte 0x04;
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@ -735,9 +742,9 @@ static psa_status_t psa_load_ecp_representation( const psa_key_slot_t *slot,
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* - `y_P` as a `ceiling(m/8)`-byte string, big-endian.
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* So its data length is 2m+1 where n is the key size in bits.
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*/
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if( ( slot->data.key.bytes & 1 ) == 0 )
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if( ( size & 1 ) == 0 )
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return( PSA_ERROR_INVALID_ARGUMENT );
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data_length = slot->data.key.bytes / 2;
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curve_size = size / 2;
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}
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/* Allocate and initialize a key representation. */
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@ -747,8 +754,8 @@ static psa_status_t psa_load_ecp_representation( const psa_key_slot_t *slot,
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mbedtls_ecp_keypair_init( ecp );
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/* Load the group. */
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grp_id = mbedtls_ecc_group_of_psa( PSA_KEY_TYPE_ECC_GET_FAMILY( slot->attr.type ),
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data_length );
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grp_id = mbedtls_ecc_group_of_psa( PSA_KEY_TYPE_ECC_GET_FAMILY( type ),
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curve_size );
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if( grp_id == MBEDTLS_ECP_DP_NONE )
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{
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status = PSA_ERROR_INVALID_ARGUMENT;
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@ -761,13 +768,13 @@ static psa_status_t psa_load_ecp_representation( const psa_key_slot_t *slot,
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goto exit;
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/* Load the key material. */
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if( PSA_KEY_TYPE_IS_PUBLIC_KEY( slot->attr.type ) )
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if( PSA_KEY_TYPE_IS_PUBLIC_KEY( type ) )
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{
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/* Load the public value. */
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status = mbedtls_to_psa_error(
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mbedtls_ecp_point_read_binary( &ecp->grp, &ecp->Q,
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slot->data.key.data,
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slot->data.key.bytes ) );
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buffer,
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size ) );
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if( status != PSA_SUCCESS )
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goto exit;
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@ -783,8 +790,8 @@ static psa_status_t psa_load_ecp_representation( const psa_key_slot_t *slot,
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status = mbedtls_to_psa_error(
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mbedtls_ecp_read_key( ecp->grp.id,
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ecp,
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slot->data.key.data,
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slot->data.key.bytes ) );
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buffer,
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size ) );
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if( status != PSA_SUCCESS )
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goto exit;
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@ -855,14 +862,11 @@ static psa_status_t psa_import_ecp_key( psa_key_slot_t *slot,
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uint8_t* output = NULL;
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mbedtls_ecp_keypair *ecp = NULL;
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/* Temporarily load input into slot. The cast here is safe since it'll
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* only be used for load_ecp_representation, which doesn't modify the
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* buffer. */
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slot->data.key.data = (uint8_t *)data;
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slot->data.key.bytes = data_length;
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/* Parse input */
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status = psa_load_ecp_representation( slot, &ecp );
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status = psa_load_ecp_representation( data,
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data_length,
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slot->attr.type,
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&ecp );
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if( status != PSA_SUCCESS )
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goto exit;
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@ -1440,7 +1444,10 @@ psa_status_t psa_get_key_attributes( psa_key_handle_t handle,
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{
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mbedtls_rsa_context *rsa = NULL;
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status = psa_load_rsa_representation( slot, &rsa );
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status = psa_load_rsa_representation( slot->data.key.data,
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slot->data.key.bytes,
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slot->attr.type,
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&rsa );
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if( status != PSA_SUCCESS )
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break;
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@ -1552,7 +1559,11 @@ static psa_status_t psa_internal_export_key( const psa_key_slot_t *slot,
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{
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#if defined(MBEDTLS_RSA_C)
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mbedtls_rsa_context *rsa = NULL;
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psa_status_t status = psa_load_rsa_representation( slot, &rsa );
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psa_status_t status = psa_load_rsa_representation(
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slot->data.key.data,
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slot->data.key.bytes,
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slot->attr.type,
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&rsa );
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if( status != PSA_SUCCESS )
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return status;
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@ -1575,7 +1586,11 @@ static psa_status_t psa_internal_export_key( const psa_key_slot_t *slot,
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{
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#if defined(MBEDTLS_ECP_C)
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mbedtls_ecp_keypair *ecp = NULL;
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psa_status_t status = psa_load_ecp_representation( slot, &ecp );
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psa_status_t status = psa_load_ecp_representation(
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slot->data.key.data,
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slot->data.key.bytes,
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slot->attr.type,
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&ecp );
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if( status != PSA_SUCCESS )
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return status;
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@ -2003,7 +2018,11 @@ static psa_status_t psa_validate_optional_attributes(
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mbedtls_mpi actual, required;
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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psa_status_t status = psa_load_rsa_representation( slot, &rsa );
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psa_status_t status = psa_load_rsa_representation(
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slot->data.key.data,
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slot->data.key.bytes,
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slot->attr.type,
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&rsa );
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if( status != PSA_SUCCESS )
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return status;
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@ -3659,7 +3678,9 @@ psa_status_t psa_sign_hash( psa_key_handle_t handle,
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{
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mbedtls_rsa_context *rsa = NULL;
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status = psa_load_rsa_representation( slot,
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status = psa_load_rsa_representation( slot->data.key.data,
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slot->data.key.bytes,
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slot->attr.type,
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&rsa );
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if( status != PSA_SUCCESS )
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goto exit;
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@ -3688,7 +3709,10 @@ psa_status_t psa_sign_hash( psa_key_handle_t handle,
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)
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{
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mbedtls_ecp_keypair *ecp = NULL;
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status = psa_load_ecp_representation( slot, &ecp );
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status = psa_load_ecp_representation( slot->data.key.data,
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slot->data.key.bytes,
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slot->attr.type,
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&ecp );
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if( status != PSA_SUCCESS )
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goto exit;
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status = psa_ecdsa_sign( ecp,
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@ -3763,7 +3787,10 @@ psa_status_t psa_verify_hash( psa_key_handle_t handle,
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{
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mbedtls_rsa_context *rsa = NULL;
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status = psa_load_rsa_representation( slot, &rsa );
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status = psa_load_rsa_representation( slot->data.key.data,
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slot->data.key.bytes,
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slot->attr.type,
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&rsa );
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if( status != PSA_SUCCESS )
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return status;
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@ -3784,7 +3811,10 @@ psa_status_t psa_verify_hash( psa_key_handle_t handle,
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if( PSA_ALG_IS_ECDSA( alg ) )
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{
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mbedtls_ecp_keypair *ecp = NULL;
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status = psa_load_ecp_representation( slot, &ecp );
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status = psa_load_ecp_representation( slot->data.key.data,
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slot->data.key.bytes,
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slot->attr.type,
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&ecp );
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if( status != PSA_SUCCESS )
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return status;
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status = psa_ecdsa_verify( ecp,
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@ -3855,7 +3885,10 @@ psa_status_t psa_asymmetric_encrypt( psa_key_handle_t handle,
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mbedtls_rsa_context *rsa = NULL;
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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status = psa_load_rsa_representation( slot, &rsa );
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status = psa_load_rsa_representation( slot->data.key.data,
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slot->data.key.bytes,
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slot->attr.type,
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&rsa );
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if( status != PSA_SUCCESS )
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return status;
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@ -3948,7 +3981,10 @@ psa_status_t psa_asymmetric_decrypt( psa_key_handle_t handle,
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mbedtls_rsa_context *rsa;
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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status = psa_load_rsa_representation( slot, &rsa );
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status = psa_load_rsa_representation( slot->data.key.data,
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slot->data.key.bytes,
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slot->attr.type,
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&rsa );
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if( status != PSA_SUCCESS )
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return status;
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@ -5548,20 +5584,16 @@ static psa_status_t psa_key_agreement_ecdh( const uint8_t *peer_key,
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size_t *shared_secret_length )
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{
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mbedtls_ecp_keypair *their_key;
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psa_key_slot_t their_key_slot;
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mbedtls_ecdh_context ecdh;
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psa_status_t status;
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size_t bits = 0;
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psa_ecc_family_t curve = mbedtls_ecc_group_to_psa( our_key->grp.id, &bits );
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mbedtls_ecdh_init( &ecdh );
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memset(&their_key_slot, 0, sizeof(their_key_slot));
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/* Creating ephemeral key slot for import purposes */
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their_key_slot.attr.type = PSA_KEY_TYPE_ECC_PUBLIC_KEY(curve);
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their_key_slot.data.key.data = (uint8_t*) peer_key;
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their_key_slot.data.key.bytes = peer_key_length;
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status = psa_load_ecp_representation( &their_key_slot, &their_key );
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status = psa_load_ecp_representation( peer_key,
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peer_key_length,
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PSA_KEY_TYPE_ECC_PUBLIC_KEY(curve),
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&their_key );
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if( status != PSA_SUCCESS )
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goto exit;
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@ -5613,7 +5645,11 @@ static psa_status_t psa_key_agreement_raw_internal( psa_algorithm_t alg,
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if( ! PSA_KEY_TYPE_IS_ECC_KEY_PAIR( private_key->attr.type ) )
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return( PSA_ERROR_INVALID_ARGUMENT );
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mbedtls_ecp_keypair *ecp = NULL;
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psa_status_t status = psa_load_ecp_representation( private_key, &ecp );
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psa_status_t status = psa_load_ecp_representation(
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private_key->data.key.data,
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private_key->data.key.bytes,
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private_key->attr.type,
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&ecp );
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if( status != PSA_SUCCESS )
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return status;
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status = psa_key_agreement_ecdh( peer_key, peer_key_length,
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