feat(pre_encrypted_ota): Added HTTPS server in pytest

esp_encrypted_img/examples/pre_encrypted_ota/README.md

@@ -52,6 +52,30 @@ idf.py build flash
 
 * An encrypted image is automatically generated by build system. Upload the generated encrypted image (`build/pre_encrypted_ota_secure.bin`) to a server for performing OTA update.
 
+### Configure and start python based HTTPS Server
+
+After a successful build, we need to create a self-signed certificate and run a simple HTTPS server as follows:
+
+![create_self_signed_certificate](https://raw.githubusercontent.com/espressif/idf-extra-components/master/esp_encrypted_img/examples/pre_encrypted_ota/docs/ota_self_signature.gif)
+
+* Create server_certs directory, Navigate to server_certs directory `cd server_certs`.
+* To create a new self-signed certificate and key, run the command `openssl req -x509 -newkey rsa:2048 -keyout ca_key.pem -out ca_cert.pem -days 365 -nodes`.
+  * When prompted for the `Common Name (CN)`, enter the name of the server that the "ESP-Dev-Board" will connect to. When running this example from a development machine, this is probably the IP address. The HTTPS client will check that the `CN` matches the address given in the HTTPS URL.
+
+You can start the server using following instructions:
+
+After the successful build, start the local python based HTTPS server using the certificate and key present in the 'server_certs' directory (certificate: ca_cert.pem and key: ca_key.pem).
+
+To start the server use the following command -
+```
+python pytest_pre_encrypted_ota.py build 8070 server_certs
+```
+
+1. build - build directory (where the new firmware image is present) will be exposed
+2. 8070 - server port (user can use any port)
+3. server_certs - cert directory where the certificate and key is present (here same ca_cert.pem is used in main/pre_encrypted_ota.c and server_certs dir). If user wants to use own certificate and key just pass the directory name, in which the certificate and key is present.
+
+* Note - If you don't want to create certificates then just run the `pytest_pre_encrypted_ota.py` without passing `server_certs` directory, the server will use the hardcoded certificates present in `pytest_pre_encrypted_ota.py`
 
 ## Configuration
 

esp_encrypted_img/examples/pre_encrypted_ota/main/tests/test_local_server_ota.c

@@ -145,13 +145,13 @@ static esp_err_t root_head_handler(httpd_req_t *req)
     return httpd_resp_send(req, NULL, binary_size); // No body for HEAD method
 }
 
-static const httpd_uri_t root = {
+static const httpd_uri_t get_root = {
     .uri       = "/",
     .method    = HTTP_GET,
     .handler   = root_get_handler
 };
 
-static const httpd_uri_t root1 = {
+static const httpd_uri_t head_root = {
     .uri       = "/",
     .method    = HTTP_HEAD,
     .handler   = root_head_handler
@@ -184,7 +184,7 @@ esp_err_t example_test_start_webserver(void)
 
     // Set URI handlers
     ESP_LOGI(TAG, "Registering URI handlers");
-    httpd_register_uri_handler(server, &root);
-    httpd_register_uri_handler(server, &root1);
+    httpd_register_uri_handler(server, &get_root);
+    httpd_register_uri_handler(server, &head_root);
     return ESP_OK;
 }

esp_encrypted_img/examples/pre_encrypted_ota/pytest_pre_encrypted_ota.py

@@ -3,8 +3,11 @@
 import http.server
 import multiprocessing
 import os
+import sys
+
 import socket
 import ssl
+from typing import Optional
 from typing import Callable
 
 import pexpect
@@ -17,6 +20,78 @@
 host_ip = '127.0.0.1'
 server_port = 443
 
+server_cert = '-----BEGIN CERTIFICATE-----\n'\
+             'MIIDKzCCAhOgAwIBAgIUBxM3WJf2bP12kAfqhmhhjZWv0ukwDQYJKoZIhvcNAQEL\n'\
+             'BQAwJTEjMCEGA1UEAwwaRVNQMzIgSFRUUFMgc2VydmVyIGV4YW1wbGUwHhcNMTgx\n'\
+             'MDE3MTEzMjU3WhcNMjgxMDE0MTEzMjU3WjAlMSMwIQYDVQQDDBpFU1AzMiBIVFRQ\n'\
+             'UyBzZXJ2ZXIgZXhhbXBsZTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB\n'\
+             'ALBint6nP77RCQcmKgwPtTsGK0uClxg+LwKJ3WXuye3oqnnjqJCwMEneXzGdG09T\n'\
+             'sA0SyNPwrEgebLCH80an3gWU4pHDdqGHfJQa2jBL290e/5L5MB+6PTs2NKcojK/k\n'\
+             'qcZkn58MWXhDW1NpAnJtjVniK2Ksvr/YIYSbyD+JiEs0MGxEx+kOl9d7hRHJaIzd\n'\
+             'GF/vO2pl295v1qXekAlkgNMtYIVAjUy9CMpqaQBCQRL+BmPSJRkXBsYk8GPnieS4\n'\
+             'sUsp53DsNvCCtWDT6fd9D1v+BB6nDk/FCPKhtjYOwOAZlX4wWNSZpRNr5dfrxKsb\n'\
+             'jAn4PCuR2akdF4G8WLUeDWECAwEAAaNTMFEwHQYDVR0OBBYEFMnmdJKOEepXrHI/\n'\
+             'ivM6mVqJgAX8MB8GA1UdIwQYMBaAFMnmdJKOEepXrHI/ivM6mVqJgAX8MA8GA1Ud\n'\
+             'EwEB/wQFMAMBAf8wDQYJKoZIhvcNAQELBQADggEBADiXIGEkSsN0SLSfCF1VNWO3\n'\
+             'emBurfOcDq4EGEaxRKAU0814VEmU87btIDx80+z5Dbf+GGHCPrY7odIkxGNn0DJY\n'\
+             'W1WcF+DOcbiWoUN6DTkAML0SMnp8aGj9ffx3x+qoggT+vGdWVVA4pgwqZT7Ybntx\n'\
+             'bkzcNFW0sqmCv4IN1t4w6L0A87ZwsNwVpre/j6uyBw7s8YoJHDLRFT6g7qgn0tcN\n'\
+             'ZufhNISvgWCVJQy/SZjNBHSpnIdCUSJAeTY2mkM4sGxY0Widk8LnjydxZUSxC3Nl\n'\
+             'hb6pnMh3jRq4h0+5CZielA4/a+TdrNPv/qok67ot/XJdY3qHCCd8O2b14OVq9jo=\n'\
+             '-----END CERTIFICATE-----\n'
+
+server_key = '-----BEGIN PRIVATE KEY-----\n'\
+             'MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQCwYp7epz++0QkH\n'\
+             'JioMD7U7BitLgpcYPi8Cid1l7snt6Kp546iQsDBJ3l8xnRtPU7ANEsjT8KxIHmyw\n'\
+             'h/NGp94FlOKRw3ahh3yUGtowS9vdHv+S+TAfuj07NjSnKIyv5KnGZJ+fDFl4Q1tT\n'\
+             'aQJybY1Z4itirL6/2CGEm8g/iYhLNDBsRMfpDpfXe4URyWiM3Rhf7ztqZdveb9al\n'\
+             '3pAJZIDTLWCFQI1MvQjKamkAQkES/gZj0iUZFwbGJPBj54nkuLFLKedw7DbwgrVg\n'\
+             '0+n3fQ9b/gQepw5PxQjyobY2DsDgGZV+MFjUmaUTa+XX68SrG4wJ+DwrkdmpHReB\n'\
+             'vFi1Hg1hAgMBAAECggEAaTCnZkl/7qBjLexIryC/CBBJyaJ70W1kQ7NMYfniWwui\n'\
+             'f0aRxJgOdD81rjTvkINsPp+xPRQO6oOadjzdjImYEuQTqrJTEUnntbu924eh+2D9\n'\
+             'Mf2CAanj0mglRnscS9mmljZ0KzoGMX6Z/EhnuS40WiJTlWlH6MlQU/FDnwC6U34y\n'\
+             'JKy6/jGryfsx+kGU/NRvKSru6JYJWt5v7sOrymHWD62IT59h3blOiP8GMtYKeQlX\n'\
+             '49om9Mo1VTIFASY3lrxmexbY+6FG8YO+tfIe0tTAiGrkb9Pz6tYbaj9FjEWOv4Vc\n'\
+             '+3VMBUVdGJjgqvE8fx+/+mHo4Rg69BUPfPSrpEg7sQKBgQDlL85G04VZgrNZgOx6\n'\
+             'pTlCCl/NkfNb1OYa0BELqWINoWaWQHnm6lX8YjrUjwRpBF5s7mFhguFjUjp/NW6D\n'\
+             '0EEg5BmO0ePJ3dLKSeOA7gMo7y7kAcD/YGToqAaGljkBI+IAWK5Su5yldrECTQKG\n'\
+             'YnMKyQ1MWUfCYEwHtPvFvE5aPwKBgQDFBWXekpxHIvt/B41Cl/TftAzE7/f58JjV\n'\
+             'MFo/JCh9TDcH6N5TMTRS1/iQrv5M6kJSSrHnq8pqDXOwfHLwxetpk9tr937VRzoL\n'\
+             'CuG1Ar7c1AO6ujNnAEmUVC2DppL/ck5mRPWK/kgLwZSaNcZf8sydRgphsW1ogJin\n'\
+             '7g0nGbFwXwKBgQCPoZY07Pr1TeP4g8OwWTu5F6dSvdU2CAbtZthH5q98u1n/cAj1\n'\
+             'noak1Srpa3foGMTUn9CHu+5kwHPIpUPNeAZZBpq91uxa5pnkDMp3UrLIRJ2uZyr8\n'\
+             '4PxcknEEh8DR5hsM/IbDcrCJQglM19ZtQeW3LKkY4BsIxjDf45ymH407IQKBgE/g\n'\
+             'Ul6cPfOxQRlNLH4VMVgInSyyxWx1mODFy7DRrgCuh5kTVh+QUVBM8x9lcwAn8V9/\n'\
+             'nQT55wR8E603pznqY/jX0xvAqZE6YVPcw4kpZcwNwL1RhEl8GliikBlRzUL3SsW3\n'\
+             'q30AfqEViHPE3XpE66PPo6Hb1ymJCVr77iUuC3wtAoGBAIBrOGunv1qZMfqmwAY2\n'\
+             'lxlzRgxgSiaev0lTNxDzZkmU/u3dgdTwJ5DDANqPwJc6b8SGYTp9rQ0mbgVHnhIB\n'\
+             'jcJQBQkTfq6Z0H6OoTVi7dPs3ibQJFrtkoyvYAbyk36quBmNRjVh6rc8468bhXYr\n'\
+             'v/t+MeGJP/0Zw8v/X2CFll96\n'\
+             '-----END PRIVATE KEY-----\n'
+
+def start_https_server(ota_image_dir: str, server_ip: str, port: int, server_file: Optional[str] = None, key_file: Optional[str] = None) -> None:
+    os.chdir(ota_image_dir)
+
+    if server_file is None:
+        server_file = os.path.join(ota_image_dir, 'server_cert.pem')
+        cert_file_handle = open(server_file, 'w+')
+        cert_file_handle.write(server_cert)
+        cert_file_handle.close()
+
+    if key_file is None:
+        key_file = os.path.join(ota_image_dir, 'server_key.pem')
+        key_file_handle = open('server_key.pem', 'w+')
+        key_file_handle.write(server_key)
+        key_file_handle.close()
+
+    httpd = http.server.HTTPServer((server_ip, port), http.server.SimpleHTTPRequestHandler)
+
+    ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
+    ssl_context.load_cert_chain(certfile=server_file, keyfile=key_file)
+
+    httpd.socket = ssl_context.wrap_socket(httpd.socket, server_side=True)
+    httpd.serve_forever()
+
 @pytest.mark.generic
 def test_examples_protocol_pre_encrypted_ota_example(dut: Dut) -> None:
     bin_path = os.path.join(dut.app.binary_path, enc_bin_name)
@@ -36,3 +111,20 @@ def test_examples_protocol_pre_encrypted_ota_example(dut: Dut) -> None:
     finally:
         pass
 
+if __name__ == '__main__':
+    if sys.argv[2:]: # if two or more arguments are provided
+        # Usage: python pytest_pre_encrypted_ota.py <image_dir> <server_port> <cert_dir>
+        this_dir = os.path.dirname(os.path.realpath(__file__))
+        bin_dir = os.path.join(this_dir, sys.argv[1])
+        port = int(sys.argv[2])
+        cert_dir = bin_dir if not sys.argv[3:] else os.path.join(this_dir, sys.argv[3])  # optional argument
+        print(f'Starting HTTPS server at "https://0.0.0.0:{port}"')
+        server_file=os.path.join(cert_dir, 'ca_cert.pem')
+        key_file=os.path.join(cert_dir, 'ca_key.pem')
+        #check if file exits
+        if not os.path.exists(server_file):
+            server_file = None
+        if not os.path.exists(key_file):
+            key_file = None
+
+        start_https_server(bin_dir, '', port, server_file, key_file)