save point

-Added parser for input and arguments

DES.py

@@ -0,0 +1,59 @@
+# Miguel Muniz
+# CS454
+
+import argparse
+
+def DES_Encrypt(data_block, key, operation):
+
+    # # Initialize the key schedule
+    # key_schedule = [0] * 56
+    # for i in range(64):
+    #     key_schedule[i] = key[i % len(key)]
+
+    # Initialize the initial permutation
+    initial_permutation = [0] * 56
+    for i in range(56):
+        initial_permutation[i] = i 
+    print (initial_permutation)
+        
+
+
+def parse_variables(file_path):
+    variables = {}
+    try:
+        with open(file_path, 'r') as file:
+            for line in file:
+                # Remove any extra spaces and ignore empty lines
+                line = line.strip()
+                if ':' in line and line:
+                    key, value = line.split(':', 1)
+                    variables[key.strip()] = value.strip()
+    except FileNotFoundError:
+        print(f"Error: The file {file_path} was not found.")
+    return variables
+
+def main():
+    # Set up command-line argument parsing
+    parser = argparse.ArgumentParser(description='Parse variables for encryption or decryption.')
+    parser.add_argument('file', type=str, help='Path to the text file containing the variables.')
+
+    # Parse the arguments
+    args = parser.parse_args()
+
+    # Parse the file and retrieve variables
+    variables = parse_variables(args.file)
+
+    # Get data_block and key from the parsed variables
+    data_block = variables.get('data_block', '')
+    key = variables.get('key', '')
+    operation = variables.get('operation','')
+
+    # Print the variables
+    print(f"Data Block: {data_block}")
+    print(f"Key: {key}")
+    print(f"Operation: {operation}")
+
+    DES_Encrypt(data_block, key, operation)
+
+if __name__ == "__main__":
+    main()