Updates cli to run with config file

apps/cli/pisa_cli.py

@@ -11,19 +11,18 @@ from uuid import uuid4
 
 from apps.cli.help import help_add_appointment, help_get_appointment
 from apps.cli.blob import Blob
-from apps.cli import (
-    DEFAULT_PISA_API_SERVER,
-    DEFAULT_PISA_API_PORT,
-    CLI_PUBLIC_KEY,
-    CLI_PRIVATE_KEY,
-    PISA_PUBLIC_KEY,
-    APPOINTMENTS_FOLDER_NAME,
-)
+import apps.cli.conf as conf
 
 from common.logger import Logger
 from common.appointment import Appointment
 from common.cryptographer import Cryptographer
-from common.tools import check_sha256_hex_format, check_locator_format, compute_locator
+from common.tools import (
+    check_sha256_hex_format,
+    check_locator_format,
+    compute_locator,
+    check_conf_fields,
+    setup_data_folder,
+)
 
 
 HTTP_OK = 200
@@ -54,6 +53,42 @@ def generate_dummy_appointment():
     logger.info("\nData stored in dummy_appointment_data.json")
 
 
+def load_config(config):
+    """
+    Looks through all of the config options to make sure they contain the right type of data and builds a config
+    dictionary.
+
+    Args:
+        config (:obj:`module`): It takes in a config module object.
+
+    Returns:
+        :obj:`dict` A dictionary containing the config values.
+    """
+
+    conf_dict = {}
+
+    data_folder = config.DATA_FOLDER
+    if isinstance(data_folder, str):
+        data_folder = os.path.expanduser(data_folder)
+    else:
+        raise ValueError("The provided user folder is invalid.")
+
+    conf_fields = {
+        "DEFAULT_PISA_API_SERVER": {"value": config.DEFAULT_PISA_API_SERVER, "type": str},
+        "DEFAULT_PISA_API_PORT": {"value": config.DEFAULT_PISA_API_PORT, "type": int},
+        "DATA_FOLDER": {"value": data_folder, "type": str},
+        "CLIENT_LOG_FILE": {"value": data_folder + config.CLIENT_LOG_FILE, "type": str},
+        "APPOINTMENTS_FOLDER_NAME": {"value": data_folder + config.APPOINTMENTS_FOLDER_NAME, "type": str},
+        "CLI_PUBLIC_KEY": {"value": data_folder + config.CLI_PUBLIC_KEY, "type": str},
+        "CLI_PRIVATE_KEY": {"value": data_folder + config.CLI_PRIVATE_KEY, "type": str},
+        "PISA_PUBLIC_KEY": {"value": data_folder + config.PISA_PUBLIC_KEY, "type": str},
+    }
+
+    check_conf_fields(conf_fields, logger)
+
+    return conf_dict
+
+
 # Loads and returns Pisa keys from disk
 def load_key_file_data(file_name):
     try:
@@ -73,13 +108,13 @@ def load_key_file_data(file_name):
 # Makes sure that the folder APPOINTMENTS_FOLDER_NAME exists, then saves the appointment and signature in it.
 def save_signed_appointment(appointment, signature):
     # Create the appointments directory if it doesn't already exist
-    os.makedirs(APPOINTMENTS_FOLDER_NAME, exist_ok=True)
+    os.makedirs(config.get("APPOINTMENTS_FOLDER_NAME"), exist_ok=True)
 
     timestamp = int(time.time())
     locator = appointment["locator"]
     uuid = uuid4().hex  # prevent filename collisions
 
-    filename = "{}/appointment-{}-{}-{}.json".format(APPOINTMENTS_FOLDER_NAME, timestamp, locator, uuid)
+    filename = "{}/appointment-{}-{}-{}.json".format(config.get("APPOINTMENTS_FOLDER_NAME"), timestamp, locator, uuid)
     data = {"appointment": appointment, "signature": signature}
 
     with open(filename, "w") as f:
@@ -233,7 +268,7 @@ def post_data_to_add_appointment_endpoint(data):
 # Verify that the signature returned from the watchtower is valid.
 def check_signature(signature, appointment):
     try:
-        pisa_pk_der = load_key_file_data(PISA_PUBLIC_KEY)
+        pisa_pk_der = load_key_file_data(config.get("PISA_PUBLIC_KEY"))
         pisa_pk = Cryptographer.load_public_key_der(pisa_pk_der)
 
         if pisa_pk is None:
@@ -287,7 +322,7 @@ def get_appointment(args):
 
 def get_appointment_signature(appointment):
     try:
-        sk_der = load_key_file_data(CLI_PRIVATE_KEY)
+        sk_der = load_key_file_data(config.get("CLI_PRIVATE_KEY"))
         cli_sk = Cryptographer.load_private_key_der(sk_der)
 
         signature = Cryptographer.sign(appointment.serialize(), cli_sk)
@@ -309,7 +344,7 @@ def get_appointment_signature(appointment):
 
 def get_pk():
     try:
-        cli_pk_der = load_key_file_data(CLI_PUBLIC_KEY)
+        cli_pk_der = load_key_file_data(config.get("CLI_PUBLIC_KEY"))
         hex_pk_der = binascii.hexlify(cli_pk_der)
 
         return hex_pk_der
@@ -345,11 +380,16 @@ def show_usage():
 
 
 if __name__ == "__main__":
-    pisa_api_server = DEFAULT_PISA_API_SERVER
-    pisa_api_port = DEFAULT_PISA_API_PORT
+    config = load_config(conf)
+
+    pisa_api_server = config.get("DEFAULT_PISA_API_SERVER")
+    pisa_api_port = config.get("DEFAULT_PISA_API_PORT")
     commands = ["add_appointment", "get_appointment", "help"]
     testing_commands = ["generate_dummy_appointment"]
 
+    # Create user folder if missing
+    setup_data_folder(config.get("DATA_FOLDER"), logger)
+
     try:
         opts, args = getopt(argv[1:], "s:p:h", ["server", "port", "help"])