psa: Move ECP key import to psa_crypto_ecp.c
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/psa_crypto_ecp.c b/library/psa_crypto_ecp.c
index 265d1ac..03ba14d 100644
--- a/library/psa_crypto_ecp.c
+++ b/library/psa_crypto_ecp.c
@@ -151,6 +151,46 @@
#if defined(BUILTIN_KEY_TYPE_ECC_KEY_PAIR) || \
defined(BUILTIN_KEY_TYPE_ECC_PUBLIC_KEY)
+
+psa_status_t mbedtls_psa_ecp_import_key(
+ const psa_key_attributes_t *attributes,
+ const uint8_t *data, size_t data_length,
+ uint8_t *key_buffer, size_t key_buffer_size,
+ size_t *key_buffer_length, size_t *bits )
+{
+ psa_status_t status;
+ mbedtls_ecp_keypair *ecp = NULL;
+
+ /* Parse input */
+ status = mbedtls_psa_ecp_load_representation( attributes->core.type,
+ data,
+ data_length,
+ &ecp );
+ if( status != PSA_SUCCESS )
+ goto exit;
+
+ if( PSA_KEY_TYPE_ECC_GET_FAMILY( attributes->core.type ) ==
+ PSA_ECC_FAMILY_MONTGOMERY )
+ *bits = ecp->grp.nbits + 1;
+ else
+ *bits = ecp->grp.nbits;
+
+ /* Re-export the data to PSA export format. There is currently no support
+ * for other input formats then the export format, so this is a 1-1
+ * copy operation. */
+ status = mbedtls_psa_ecp_export_key( attributes->core.type,
+ ecp,
+ key_buffer,
+ key_buffer_size,
+ key_buffer_length );
+exit:
+ /* Always free the PK object (will also free contained ECP context) */
+ mbedtls_ecp_keypair_free( ecp );
+ mbedtls_free( ecp );
+
+ return( status );
+}
+
psa_status_t mbedtls_psa_ecp_export_key( psa_key_type_t type,
mbedtls_ecp_keypair *ecp,
uint8_t *data,