Replace HTML/JS files with python script for converting PEM to C stri…

…ng (#63)

* Replace HTML/JS files with python script for converting PEM to C string

* Update the script to generate demo_config file

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>

* Fix formatting check

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>

---------

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
Co-authored-by: Gaurav Aggarwal <aggarg@amazon.com>

.gitignore

@@ -1,4 +1,4 @@
-# Ignore macOS file system related.  
+# Ignore macOS file system related.
 **/*.DS_Store*
 
 # Ignore build results
@@ -24,3 +24,6 @@ __pycache__/
 *.a
 *.map
 *.elf
+
+# Tool generated file
+lib/AWS/tools/aws_config_offline/demo_config.h

lib/AWS/tools/aws_config_offline/demo_config_generator.py

@@ -0,0 +1,137 @@
+#!/usr/bin/env python
+
+import os
+import re
+import argparse
+from enum import Enum
+
+
+THIS_FILE_DIR = os.path.dirname(os.path.abspath(__file__))
+DEMO_CONFIG_FILE_PATH = os.path.abspath(os.path.join(THIS_FILE_DIR, '..', '..', '..', '..', 'source', 'configuration-files', 'demo_config.h'))
+GENERATED_DEMO_CONFIG_FILE_PATH = os.path.join(THIS_FILE_DIR, 'demo_config.h')
+
+
+class CredentialType(Enum):
+    PRIV_KEY = 1
+    CERT = 2
+    ROOT_CA = 3
+    THING_NAME = 4
+    ENDPOINT = 5
+
+
+CREDS_IDENTIFIER_MAP = {
+    CredentialType.PRIV_KEY: '#define democonfigCLIENT_PRIVATE_KEY_PEM',
+    CredentialType.CERT: '#define democonfigCLIENT_CERTIFICATE_PEM',
+    CredentialType.ROOT_CA: '#define democonfigROOT_CA_PEM',
+    CredentialType.THING_NAME: '#define democonfigCLIENT_IDENTIFIER',
+    CredentialType.ENDPOINT: '#define democonfigMQTT_BROKER_ENDPOINT'
+}
+
+
+def prepare_cred_string(cred_file):
+    with open(cred_file, 'r') as f:
+        cred_file_content = f.read()
+
+    cred_lines = cred_file_content.rstrip('\n').split('\n')
+    cred_string = ''
+    for cred_line in cred_lines[:-1]:
+        cred_string += f'"{cred_line}\\n" \\\n'
+    cred_string += f'"{cred_lines[-1]}\\n"\n'
+
+    return cred_string
+
+
+def prepare_priv_key_string(priv_key_file):
+    return f'{CREDS_IDENTIFIER_MAP[CredentialType.PRIV_KEY]} \\\n{prepare_cred_string(priv_key_file)}'
+
+
+def prepare_cert_string(cert_file):
+    return f'{CREDS_IDENTIFIER_MAP[CredentialType.CERT]} \\\n{prepare_cred_string(cert_file)}'
+
+
+def prepare_root_ca_string(root_ca_file):
+    return f'{CREDS_IDENTIFIER_MAP[CredentialType.ROOT_CA]} \\\n{prepare_cred_string(root_ca_file)}'
+
+
+def prepare_endpoint_string(endpoint):
+    return f'{CREDS_IDENTIFIER_MAP[CredentialType.ENDPOINT]} "{endpoint}"\n'
+
+
+def prepare_thing_name_string(thing_name):
+    return f'{CREDS_IDENTIFIER_MAP[CredentialType.THING_NAME]} "{thing_name}"\n'
+
+
+def replace_identifier_with_string(content_lines, identifier, string):
+    pattern = re.compile(f'^{identifier} .*$')
+
+    modified_content_lines = []
+    for line in content_lines:
+        if pattern.match(line):
+            modified_content_lines.append(string)
+        else:
+            modified_content_lines.append(line)
+
+    return modified_content_lines
+
+
+def generate_demo_config_file(priv_key_string,
+                              cert_string,
+                              root_ca_string,
+                              thing_name_string,
+                              endpoint_string):
+    with open(DEMO_CONFIG_FILE_PATH, 'r') as f:
+        demo_config_lines = f.readlines()
+
+    modified_demo_config_lines = replace_identifier_with_string(demo_config_lines,
+                                                                CREDS_IDENTIFIER_MAP[CredentialType.PRIV_KEY],
+                                                                priv_key_string)
+    modified_demo_config_lines = replace_identifier_with_string(modified_demo_config_lines,
+                                                                CREDS_IDENTIFIER_MAP[CredentialType.CERT],
+                                                                cert_string)
+    modified_demo_config_lines = replace_identifier_with_string(modified_demo_config_lines,
+                                                                CREDS_IDENTIFIER_MAP[CredentialType.ROOT_CA],
+                                                                root_ca_string)
+    modified_demo_config_lines = replace_identifier_with_string(modified_demo_config_lines,
+                                                                CREDS_IDENTIFIER_MAP[CredentialType.THING_NAME],
+                                                                thing_name_string)
+    modified_demo_config_lines = replace_identifier_with_string(modified_demo_config_lines,
+                                                                CREDS_IDENTIFIER_MAP[CredentialType.ENDPOINT],
+                                                                endpoint_string)
+
+    with open(GENERATED_DEMO_CONFIG_FILE_PATH, 'w') as f:
+        f.writelines(modified_demo_config_lines)
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(description='Generate the demo_config.h file.')
+    parser.add_argument('-p', '--priv-key-file', type=str, required=True, help='The path (relative or absolute) to Device Private Key file.')
+    parser.add_argument('-c', '--cert-file', type=str, required=True, help='The path (relative or absolute) to Device Certificate File.')
+    parser.add_argument('-r', '--root-ca-file', type=str, required=True, help='The path (relative or absolute) to the Server Root CA file.')
+    parser.add_argument('-t', '--thing-name', type=str, required=True, help='The AWS IoT thing name.')
+    parser.add_argument('-e', '--endpoint', type=str, required=True, help='The AWS IoT end point.')
+
+    args = parser.parse_args()
+    return args
+
+
+def main():
+    args = parse_args()
+    priv_key_string = prepare_priv_key_string(args.priv_key_file)
+    cert_string = prepare_cert_string(args.cert_file)
+    root_ca_string = prepare_root_ca_string(args.root_ca_file)
+    thing_name_string = prepare_thing_name_string(args.thing_name)
+    endpoint_string = prepare_endpoint_string(args.endpoint)
+
+    generate_demo_config_file(priv_key_string,
+                              cert_string,
+                              root_ca_string,
+                              thing_name_string,
+                              endpoint_string)
+
+    print('===================================')
+    print(f'Replace {DEMO_CONFIG_FILE_PATH} with {GENERATED_DEMO_CONFIG_FILE_PATH}.')
+    print('===================================')
+
+
+if __name__ == "__main__":
+    main()