[Silabs]Provision storage sourceset (project-chip#34929)

* Create a separte source_set for the provision storage implementation

* Fix efr32 build using provision flash storage

* fix argument duplication which is not needed.

* apply suggested renames

Author: jmartinez-silabs

examples/platform/silabs/SiWx917/BUILD.gn

@@ -115,12 +115,6 @@ source_set("siwx917-matter-shell") {
 
 config("siwx917-common-config") {
   defines = [ "OTA_PERIODIC_TIMEOUT=${ota_periodic_query_timeout_sec}" ]
-  if (sl_si91x_crypto_flavor == "psa") {
-    libs =
-        [ "${sdk_support_root}/matter/provision/lib/libProvisionPSA_si917.a" ]
-  } else {
-    libs = [ "${sdk_support_root}/matter/provision/lib/libProvision_si917.a" ]
-  }
 
   if (!disable_lcd) {
     include_dirs = [ "${silabs_common_plat_dir}/display" ]
@@ -177,7 +171,7 @@ config("silabs-wifi-config") {
 }
 
 source_set("siwx917-common") {
-  deps = [ "${chip_root}/src/platform/silabs/provision:provision-headers" ]
+  deps = [ "${silabs_common_plat_dir}/provision:storage" ]
   defines = []
   public_deps = []
   public_configs = [
@@ -197,8 +191,6 @@ source_set("siwx917-common") {
     "${silabs_common_plat_dir}/LEDWidget.cpp",
     "${silabs_common_plat_dir}/MatterConfig.cpp",
     "${silabs_common_plat_dir}/SoftwareFaultReports.cpp",
-    "${silabs_common_plat_dir}/provision/ProvisionStorageCustom.cpp",
-    "${silabs_common_plat_dir}/provision/ProvisionStorageFlash.cpp",
     "${silabs_common_plat_dir}/silabs_utils.cpp",
     "${silabs_common_plat_dir}/syscalls_stubs.cpp",
     "${silabs_plat_si91x_wifi_dir}/dhcp_client.cpp",

examples/platform/silabs/efr32/BUILD.gn

@@ -148,9 +148,6 @@ source_set("efr-matter-shell") {
 
 config("efr32-common-config") {
   defines = [ "OTA_PERIODIC_TIMEOUT=${ota_periodic_query_timeout_sec}" ]
-  libs = [
-    "${sdk_support_root}/matter/provision/lib/libProvision_${silabs_family}.a",
-  ]
 
   if (!disable_lcd) {
     include_dirs = [ "${silabs_common_plat_dir}/display" ]
@@ -212,7 +209,7 @@ config("silabs-wifi-config") {
 }
 
 source_set("efr32-common") {
-  deps = [ "${chip_root}/src/platform/silabs/provision:provision-headers" ]
+  deps = [ "${silabs_common_plat_dir}/provision:storage" ]
   defines = []
   public_deps = []
   public_configs = [
@@ -241,8 +238,6 @@ source_set("efr32-common") {
     "${silabs_common_plat_dir}/LEDWidget.cpp",
     "${silabs_common_plat_dir}/MatterConfig.cpp",
     "${silabs_common_plat_dir}/SoftwareFaultReports.cpp",
-    "${silabs_common_plat_dir}/provision/ProvisionStorageCustom.cpp",
-    "${silabs_common_plat_dir}/provision/ProvisionStorageDefault.cpp",
     "${silabs_common_plat_dir}/silabs_utils.cpp",
     "${silabs_common_plat_dir}/syscalls_stubs.cpp",
   ]

examples/platform/silabs/provision/BUILD.gn

@@ -0,0 +1,52 @@
+# Copyright (c) 2024 Project CHIP Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import("//build_overrides/chip.gni")
+import("//build_overrides/efr32_sdk.gni")
+import("${efr32_sdk_build_root}/silabs_board.gni")
+
+if (wifi_soc) {
+  import("${efr32_sdk_build_root}/SiWx917_sdk.gni")
+} else {
+  import("${efr32_sdk_build_root}/efr32_sdk.gni")
+}
+
+source_set("storage") {
+  sources = [ "ProvisionStorageCustom.cpp" ]
+
+  if (use_provision_flash_storage) {
+    sources += [ "ProvisionStorageFlash.cpp" ]
+  } else {
+    sources += [ "ProvisionStorageDefault.cpp" ]
+  }
+
+  if (wifi_soc) {
+    if (sl_si91x_crypto_flavor == "psa") {
+      libs =
+          [ "${sdk_support_root}/matter/provision/lib/libProvisionPSA_si917.a" ]
+    } else {
+      libs = [ "${sdk_support_root}/matter/provision/lib/libProvision_si917.a" ]
+    }
+  } else {
+    if (use_provision_flash_storage) {
+      libs = [ "${sdk_support_root}/matter/provision/lib/libProvisionFlash_${silabs_family}.a" ]
+    } else {
+      libs = [ "${sdk_support_root}/matter/provision/lib/libProvision_${silabs_family}.a" ]
+    }
+  }
+
+  deps = [ "${chip_root}/src/lib" ]
+  public_deps =
+      [ "${chip_root}/src/platform/silabs/provision:provision-headers" ]
+}

src/platform/silabs/efr32/efr32-chip-mbedtls-config.h

@@ -87,6 +87,12 @@
 #define PSA_WANT_ALG_SOME_PAKE
 #endif // SL_USE_COAP_CONFIG
 
+#if SL_MATTER_PROVISION_FLASH
+#define MBEDTLS_SHA256_C
+#define MBEDTLS_HMAC_DRBG_C
+#define MBEDTLS_ECDSA_DETERMINISTIC
+#endif // SL_MATTER_PROVISION_FLASH
+
 #define MBEDTLS_PLATFORM_SNPRINTF_MACRO snprintf
 
 #define MBEDTLS_AES_ROM_TABLES

third_party/silabs/efr32_sdk.gni

@@ -82,6 +82,9 @@ declare_args() {
   chip_enable_multi_ota_requestor = false
   chip_enable_multi_ota_encryption = false
   chip_enable_ota_custom_tlv_testing = false
+
+  # Factory Provision storage
+  use_provision_flash_storage = wifi_soc
 }
 
 examples_plat_dir = "${chip_root}/examples/platform/silabs/efr32"
@@ -469,6 +472,12 @@ template("efr32_sdk") {
       defines += [ "SL_USE_COAP_CONFIG=0" ]
     }
 
+    if (use_provision_flash_storage) {
+      defines += [ "SL_MATTER_PROVISION_FLASH=1" ]
+    } else {
+      defines += [ "SL_MATTER_PROVISION_FLASH=0" ]
+    }
+
     if (chip_enable_ble_rs911x) {
       defines += [
         "RSI_BLE_ENABLE=1",