feature/wifi-provisioning: Added wifi-provisioning component from idf.

Added wifi-provisioning examples and esp_prov tool.

tools/esp_prov/prov/custom_prov.py

@@ -0,0 +1,43 @@
+# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
+#
+# 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.
+#
+
+# APIs for interpreting and creating protobuf packets for `custom-config` protocomm endpoint
+
+from __future__ import print_function
+from future.utils import tobytes
+
+import utils
+import proto
+
+def print_verbose(security_ctx, data):
+    if (security_ctx.verbose):
+         print("++++ " + data + " ++++")
+
+def custom_config_request(security_ctx, info, version):
+    # Form protobuf request packet from custom-config data
+    cmd = proto.custom_config_pb2.CustomConfigRequest()
+    cmd.info = tobytes(info)
+    cmd.version = version
+    enc_cmd = security_ctx.encrypt_data(cmd.SerializeToString()).decode('latin-1')
+    print_verbose(security_ctx, "Client -> Device (CustomConfig cmd) " + utils.str_to_hexstr(enc_cmd))
+    return enc_cmd
+
+def custom_config_response(security_ctx, response_data):
+    # Interpret protobuf response packet
+    decrypt = security_ctx.decrypt_data(tobytes(response_data))
+    cmd_resp = proto.custom_config_pb2.CustomConfigResponse()
+    cmd_resp.ParseFromString(decrypt)
+    print_verbose(security_ctx, "CustomConfig status " + str(cmd_resp.status))
+    return cmd_resp.status