Update after feedback from #3492
* Allocate internal representation contexts on the heap (i.e. don't change where they're being allocated) * Unify load_xxx_representation in terms of allocation and init behaviour Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
This commit is contained in:
parent
75b743666e
commit
a2371e53e4
1 changed files with 111 additions and 79 deletions
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@ -520,14 +520,14 @@ static psa_status_t psa_check_rsa_key_byte_aligned(
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/** Load the contents of a key slot 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[out] rsa The internal RSA representation to hold the key. Must be
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* allocated and initialized. If it already holds a
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* different key, it will be overwritten and cause a memory
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* leak.
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* \param[in] slot The slot from which to load the representation
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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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mbedtls_rsa_context *rsa )
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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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psa_status_t status;
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@ -567,9 +567,10 @@ static psa_status_t psa_load_rsa_representation( const psa_key_slot_t *slot,
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if( status != PSA_SUCCESS )
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goto exit;
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/* Copy the PK-contained RSA context to the one provided as function input */
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status = mbedtls_to_psa_error(
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mbedtls_rsa_copy( rsa, mbedtls_pk_rsa( ctx ) ) );
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/* Copy out the pointer to the RSA context, and reset the PK context
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* such that pk_free doesn't free the RSA context we just grabbed. */
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*p_rsa = mbedtls_pk_rsa( ctx );
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ctx.pk_info = NULL;
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exit:
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mbedtls_pk_free( &ctx );
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@ -653,8 +654,7 @@ static psa_status_t psa_import_rsa_key( psa_key_slot_t *slot,
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{
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psa_status_t status;
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uint8_t* output = NULL;
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mbedtls_rsa_context rsa;
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mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_NONE );
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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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@ -668,7 +668,7 @@ static psa_status_t psa_import_rsa_key( psa_key_slot_t *slot,
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goto exit;
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slot->attr.bits = (psa_key_bits_t) PSA_BYTES_TO_BITS(
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mbedtls_rsa_get_len( &rsa ) );
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mbedtls_rsa_get_len( rsa ) );
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/* Re-export the data to PSA export format, such that we can store export
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* representation in the key slot. Export representation in case of RSA is
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@ -683,14 +683,16 @@ static psa_status_t psa_import_rsa_key( psa_key_slot_t *slot,
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}
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status = psa_export_rsa_key( slot->attr.type,
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&rsa,
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rsa,
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output,
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data_length,
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&data_length);
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exit:
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/* Always free the RSA object */
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mbedtls_rsa_free( &rsa );
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mbedtls_rsa_free( rsa );
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if( rsa != NULL )
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mbedtls_free( rsa );
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/* Free the allocated buffer only on error. */
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if( status != PSA_SUCCESS )
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@ -710,15 +712,24 @@ 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 key slot contents into an mbedTLS internal representation object.
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* Note: caller is responsible for freeing the object properly */
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/** Load the contents of a key slot 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[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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mbedtls_ecp_keypair *ecp )
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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_init( ecp );
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mbedtls_ecp_keypair *ecp = mbedtls_calloc(1, sizeof(mbedtls_ecp_keypair));
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if( ecp == NULL )
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return PSA_ERROR_INSUFFICIENT_MEMORY;
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if( PSA_KEY_TYPE_IS_PUBLIC_KEY( slot->attr.type ) )
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{
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@ -733,6 +744,8 @@ static psa_status_t psa_load_ecp_representation( const psa_key_slot_t *slot,
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data_length = slot->data.key.bytes / 2;
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}
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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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@ -777,9 +790,15 @@ static psa_status_t psa_load_ecp_representation( const psa_key_slot_t *slot,
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if( status != PSA_SUCCESS )
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goto exit;
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}
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*p_ecp = ecp;
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exit:
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if( status != PSA_SUCCESS )
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{
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mbedtls_ecp_keypair_free( ecp );
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mbedtls_free( ecp );
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}
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return status;
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}
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@ -835,7 +854,7 @@ static psa_status_t psa_import_ecp_key( psa_key_slot_t *slot,
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{
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psa_status_t status;
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uint8_t* output = NULL;
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mbedtls_ecp_keypair ecp;
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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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@ -849,9 +868,9 @@ static psa_status_t psa_import_ecp_key( psa_key_slot_t *slot,
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goto exit;
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if( PSA_KEY_TYPE_ECC_GET_FAMILY( slot->attr.type ) == PSA_ECC_FAMILY_MONTGOMERY)
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slot->attr.bits = (psa_key_bits_t) ecp.grp.nbits + 1;
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slot->attr.bits = (psa_key_bits_t) ecp->grp.nbits + 1;
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else
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slot->attr.bits = (psa_key_bits_t) ecp.grp.nbits;
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slot->attr.bits = (psa_key_bits_t) ecp->grp.nbits;
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/* Re-export the data to PSA export format. There is currently no support
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* for other input formats then the export format, so this is a 1-1
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@ -865,14 +884,16 @@ static psa_status_t psa_import_ecp_key( psa_key_slot_t *slot,
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}
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status = psa_export_ecp_key( slot->attr.type,
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&ecp,
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ecp,
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output,
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data_length,
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&data_length);
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exit:
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/* Always free the PK object (will also free contained RSA context) */
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mbedtls_ecp_keypair_free( &ecp );
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/* Always free the PK object (will also free contained ECP context) */
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mbedtls_ecp_keypair_free( ecp );
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if( ecp != NULL )
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mbedtls_free( ecp );
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/* Free the allocated buffer only on error. */
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if( status != PSA_SUCCESS )
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@ -1419,16 +1440,16 @@ psa_status_t psa_get_key_attributes( psa_key_handle_t handle,
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break;
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#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
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{
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mbedtls_rsa_context rsa;
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mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_NONE );
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mbedtls_rsa_context *rsa = NULL;
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status = psa_load_rsa_representation( slot, &rsa );
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if( status != PSA_SUCCESS )
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break;
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status = psa_get_rsa_public_exponent( &rsa,
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status = psa_get_rsa_public_exponent( rsa,
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attributes );
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mbedtls_rsa_free( &rsa );
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mbedtls_rsa_free( rsa );
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mbedtls_free( rsa );
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}
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break;
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#endif /* MBEDTLS_RSA_C */
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@ -1532,20 +1553,19 @@ static psa_status_t psa_internal_export_key( const psa_key_slot_t *slot,
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if( PSA_KEY_TYPE_IS_RSA( slot->attr.type ) )
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{
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#if defined(MBEDTLS_RSA_C)
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mbedtls_rsa_context rsa;
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mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_NONE );
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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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if( status != PSA_SUCCESS )
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return status;
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status = psa_export_rsa_key( PSA_KEY_TYPE_RSA_PUBLIC_KEY,
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&rsa,
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rsa,
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data,
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data_size,
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data_length );
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mbedtls_rsa_free( &rsa );
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mbedtls_rsa_free( rsa );
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mbedtls_free( rsa );
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return( status );
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#else
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else
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{
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#if defined(MBEDTLS_ECP_C)
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mbedtls_ecp_keypair ecp;
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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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if( status != PSA_SUCCESS )
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return status;
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status = psa_export_ecp_key( PSA_KEY_TYPE_ECC_PUBLIC_KEY(
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PSA_KEY_TYPE_ECC_GET_FAMILY(
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slot->attr.type ) ),
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&ecp,
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ecp,
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data,
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data_size,
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data_length );
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mbedtls_ecp_keypair_free( &ecp );
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mbedtls_ecp_keypair_free( ecp );
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mbedtls_free( ecp );
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return( status );
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#else
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/* We don't know how to convert a private ECC key to public */
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@ -1980,8 +2001,7 @@ static psa_status_t psa_validate_optional_attributes(
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#if defined(MBEDTLS_RSA_C)
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if( PSA_KEY_TYPE_IS_RSA( slot->attr.type ) )
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{
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mbedtls_rsa_context rsa;
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mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_NONE );
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mbedtls_rsa_context *rsa = NULL;
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mbedtls_mpi actual, required;
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psa_status_t status = psa_load_rsa_representation( slot, &rsa );
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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mbedtls_mpi_init( &actual );
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mbedtls_mpi_init( &required );
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ret = mbedtls_rsa_export( &rsa,
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ret = mbedtls_rsa_export( rsa,
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NULL, NULL, NULL, NULL, &actual );
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mbedtls_rsa_free( &rsa );
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mbedtls_rsa_free( rsa );
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mbedtls_free( rsa );
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if( ret != 0 )
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goto rsa_exit;
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ret = mbedtls_mpi_read_binary( &required,
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@ -3638,21 +3659,21 @@ psa_status_t psa_sign_hash( psa_key_handle_t handle,
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#if defined(MBEDTLS_RSA_C)
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if( slot->attr.type == PSA_KEY_TYPE_RSA_KEY_PAIR )
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{
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mbedtls_rsa_context rsa;
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mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_NONE );
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mbedtls_rsa_context *rsa = NULL;
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status = psa_load_rsa_representation( slot,
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&rsa );
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if( status != PSA_SUCCESS )
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goto exit;
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status = psa_rsa_sign( &rsa,
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status = psa_rsa_sign( rsa,
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alg,
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hash, hash_length,
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signature, signature_size,
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signature_length );
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mbedtls_rsa_free( &rsa );
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mbedtls_rsa_free( rsa );
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mbedtls_free( rsa );
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}
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else
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#endif /* defined(MBEDTLS_RSA_C) */
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@ -3668,16 +3689,17 @@ psa_status_t psa_sign_hash( psa_key_handle_t handle,
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#endif
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)
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{
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mbedtls_ecp_keypair ecp;
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mbedtls_ecp_keypair *ecp = NULL;
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status = psa_load_ecp_representation( slot, &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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status = psa_ecdsa_sign( ecp,
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alg,
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hash, hash_length,
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signature, signature_size,
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signature_length );
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mbedtls_ecp_keypair_free( &ecp );
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mbedtls_ecp_keypair_free( ecp );
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mbedtls_free( ecp );
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}
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else
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#endif /* defined(MBEDTLS_ECDSA_C) */
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@ -3741,18 +3763,18 @@ psa_status_t psa_verify_hash( psa_key_handle_t handle,
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#if defined(MBEDTLS_RSA_C)
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if( PSA_KEY_TYPE_IS_RSA( slot->attr.type ) )
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{
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mbedtls_rsa_context rsa;
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mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_NONE );
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mbedtls_rsa_context *rsa = NULL;
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status = psa_load_rsa_representation( slot, &rsa );
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if( status != PSA_SUCCESS )
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return status;
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status = psa_rsa_verify( &rsa,
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status = psa_rsa_verify( rsa,
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alg,
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hash, hash_length,
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signature, signature_length );
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mbedtls_rsa_free( &rsa );
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mbedtls_rsa_free( rsa );
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mbedtls_free( rsa );
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return( status );
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}
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else
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@ -3763,14 +3785,15 @@ psa_status_t psa_verify_hash( psa_key_handle_t handle,
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#if defined(MBEDTLS_ECDSA_C)
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if( PSA_ALG_IS_ECDSA( alg ) )
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{
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mbedtls_ecp_keypair ecp;
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mbedtls_ecp_keypair *ecp = NULL;
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status = psa_load_ecp_representation( slot, &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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status = psa_ecdsa_verify( ecp,
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hash, hash_length,
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signature, signature_length );
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mbedtls_ecp_keypair_free( &ecp );
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mbedtls_ecp_keypair_free( ecp );
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mbedtls_free( ecp );
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return status;
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}
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else
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@ -3831,22 +3854,23 @@ psa_status_t psa_asymmetric_encrypt( psa_key_handle_t handle,
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#if defined(MBEDTLS_RSA_C)
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if( PSA_KEY_TYPE_IS_RSA( slot->attr.type ) )
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{
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mbedtls_rsa_context rsa;
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mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_NONE );
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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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if( status != PSA_SUCCESS )
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return status;
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if( output_size < mbedtls_rsa_get_len( &rsa ) )
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if( output_size < mbedtls_rsa_get_len( rsa ) )
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{
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mbedtls_rsa_free( &rsa );
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mbedtls_rsa_free( rsa );
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mbedtls_free( rsa );
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return( PSA_ERROR_BUFFER_TOO_SMALL );
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}
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#if defined(MBEDTLS_PKCS1_V15)
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if( alg == PSA_ALG_RSA_PKCS1V15_CRYPT )
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{
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ret = mbedtls_rsa_pkcs1_encrypt( &rsa,
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ret = mbedtls_rsa_pkcs1_encrypt( rsa,
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mbedtls_ctr_drbg_random,
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&global_data.ctr_drbg,
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MBEDTLS_RSA_PUBLIC,
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@ -3859,8 +3883,8 @@ psa_status_t psa_asymmetric_encrypt( psa_key_handle_t handle,
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#if defined(MBEDTLS_PKCS1_V21)
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if( PSA_ALG_IS_RSA_OAEP( alg ) )
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{
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psa_rsa_oaep_set_padding_mode( alg, &rsa );
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ret = mbedtls_rsa_rsaes_oaep_encrypt( &rsa,
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psa_rsa_oaep_set_padding_mode( alg, rsa );
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ret = mbedtls_rsa_rsaes_oaep_encrypt( rsa,
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mbedtls_ctr_drbg_random,
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&global_data.ctr_drbg,
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MBEDTLS_RSA_PUBLIC,
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@ -3872,13 +3896,15 @@ psa_status_t psa_asymmetric_encrypt( psa_key_handle_t handle,
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else
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#endif /* MBEDTLS_PKCS1_V21 */
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{
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mbedtls_rsa_free( &rsa );
|
||||
mbedtls_rsa_free( rsa );
|
||||
mbedtls_free( rsa );
|
||||
return( PSA_ERROR_INVALID_ARGUMENT );
|
||||
}
|
||||
if( ret == 0 )
|
||||
*output_length = mbedtls_rsa_get_len( &rsa );
|
||||
*output_length = mbedtls_rsa_get_len( rsa );
|
||||
|
||||
mbedtls_rsa_free( &rsa );
|
||||
mbedtls_rsa_free( rsa );
|
||||
mbedtls_free( rsa );
|
||||
return( mbedtls_to_psa_error( ret ) );
|
||||
}
|
||||
else
|
||||
|
@ -3921,24 +3947,24 @@ psa_status_t psa_asymmetric_decrypt( psa_key_handle_t handle,
|
|||
#if defined(MBEDTLS_RSA_C)
|
||||
if( slot->attr.type == PSA_KEY_TYPE_RSA_KEY_PAIR )
|
||||
{
|
||||
mbedtls_rsa_context rsa;
|
||||
mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_NONE );
|
||||
mbedtls_rsa_context *rsa;
|
||||
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
||||
|
||||
status = psa_load_rsa_representation( slot, &rsa );
|
||||
if( status != PSA_SUCCESS )
|
||||
return status;
|
||||
|
||||
if( input_length != mbedtls_rsa_get_len( &rsa ) )
|
||||
if( input_length != mbedtls_rsa_get_len( rsa ) )
|
||||
{
|
||||
mbedtls_rsa_free( &rsa );
|
||||
mbedtls_rsa_free( rsa );
|
||||
mbedtls_free( rsa );
|
||||
return( PSA_ERROR_INVALID_ARGUMENT );
|
||||
}
|
||||
|
||||
#if defined(MBEDTLS_PKCS1_V15)
|
||||
if( alg == PSA_ALG_RSA_PKCS1V15_CRYPT )
|
||||
{
|
||||
ret = mbedtls_rsa_pkcs1_decrypt( &rsa,
|
||||
ret = mbedtls_rsa_pkcs1_decrypt( rsa,
|
||||
mbedtls_ctr_drbg_random,
|
||||
&global_data.ctr_drbg,
|
||||
MBEDTLS_RSA_PRIVATE,
|
||||
|
@ -3952,8 +3978,8 @@ psa_status_t psa_asymmetric_decrypt( psa_key_handle_t handle,
|
|||
#if defined(MBEDTLS_PKCS1_V21)
|
||||
if( PSA_ALG_IS_RSA_OAEP( alg ) )
|
||||
{
|
||||
psa_rsa_oaep_set_padding_mode( alg, &rsa );
|
||||
ret = mbedtls_rsa_rsaes_oaep_decrypt( &rsa,
|
||||
psa_rsa_oaep_set_padding_mode( alg, rsa );
|
||||
ret = mbedtls_rsa_rsaes_oaep_decrypt( rsa,
|
||||
mbedtls_ctr_drbg_random,
|
||||
&global_data.ctr_drbg,
|
||||
MBEDTLS_RSA_PRIVATE,
|
||||
|
@ -3966,11 +3992,13 @@ psa_status_t psa_asymmetric_decrypt( psa_key_handle_t handle,
|
|||
else
|
||||
#endif /* MBEDTLS_PKCS1_V21 */
|
||||
{
|
||||
mbedtls_rsa_free( &rsa );
|
||||
mbedtls_rsa_free( rsa );
|
||||
mbedtls_free( rsa );
|
||||
return( PSA_ERROR_INVALID_ARGUMENT );
|
||||
}
|
||||
|
||||
mbedtls_rsa_free( &rsa );
|
||||
mbedtls_rsa_free( rsa );
|
||||
mbedtls_free( rsa );
|
||||
return( mbedtls_to_psa_error( ret ) );
|
||||
}
|
||||
else
|
||||
|
@ -5521,7 +5549,7 @@ static psa_status_t psa_key_agreement_ecdh( const uint8_t *peer_key,
|
|||
size_t shared_secret_size,
|
||||
size_t *shared_secret_length )
|
||||
{
|
||||
mbedtls_ecp_keypair their_key;
|
||||
mbedtls_ecp_keypair *their_key;
|
||||
psa_key_slot_t their_key_slot;
|
||||
mbedtls_ecdh_context ecdh;
|
||||
psa_status_t status;
|
||||
|
@ -5540,7 +5568,7 @@ static psa_status_t psa_key_agreement_ecdh( const uint8_t *peer_key,
|
|||
goto exit;
|
||||
|
||||
status = mbedtls_to_psa_error(
|
||||
mbedtls_ecdh_get_params( &ecdh, &their_key, MBEDTLS_ECDH_THEIRS ) );
|
||||
mbedtls_ecdh_get_params( &ecdh, their_key, MBEDTLS_ECDH_THEIRS ) );
|
||||
if( status != PSA_SUCCESS )
|
||||
goto exit;
|
||||
status = mbedtls_to_psa_error(
|
||||
|
@ -5563,7 +5591,10 @@ exit:
|
|||
if( status != PSA_SUCCESS )
|
||||
mbedtls_platform_zeroize( shared_secret, shared_secret_size );
|
||||
mbedtls_ecdh_free( &ecdh );
|
||||
mbedtls_ecp_keypair_free( &their_key );
|
||||
mbedtls_ecp_keypair_free( their_key );
|
||||
if( their_key != NULL)
|
||||
mbedtls_free( their_key );
|
||||
|
||||
return( status );
|
||||
}
|
||||
#endif /* MBEDTLS_ECDH_C */
|
||||
|
@ -5584,15 +5615,16 @@ static psa_status_t psa_key_agreement_raw_internal( psa_algorithm_t alg,
|
|||
case PSA_ALG_ECDH:
|
||||
if( ! PSA_KEY_TYPE_IS_ECC_KEY_PAIR( private_key->attr.type ) )
|
||||
return( PSA_ERROR_INVALID_ARGUMENT );
|
||||
mbedtls_ecp_keypair ecp;
|
||||
mbedtls_ecp_keypair *ecp = NULL;
|
||||
psa_status_t status = psa_load_ecp_representation( private_key, &ecp );
|
||||
if( status != PSA_SUCCESS )
|
||||
return status;
|
||||
status = psa_key_agreement_ecdh( peer_key, peer_key_length,
|
||||
&ecp,
|
||||
ecp,
|
||||
shared_secret, shared_secret_size,
|
||||
shared_secret_length );
|
||||
mbedtls_ecp_keypair_free( &ecp );
|
||||
mbedtls_ecp_keypair_free( ecp );
|
||||
mbedtls_free( ecp );
|
||||
return status;
|
||||
#endif /* MBEDTLS_ECDH_C */
|
||||
default:
|
||||
|
|
Loading…
Reference in a new issue