


import os
import sys

from . import rsa_key_generator as rkg

SCREAMING_SNAKE_CASE		:str											=       1_28
SCREAMING_SNAKE_CASE		:Union[str, Any]											=       2_56



def      _lowerCAmelCase  (							lowerCAmelCase_							:str						,  lowerCAmelCase_							:int = DEFAULT_BLOCK_SIZE							)->list[int]:
   '''simple docstring'''






   snake_case_         =   message.encode("ascii"							)

   snake_case_         =   []
   for block_start in range(0						,  len(lowerCAmelCase_							)						,  lowerCAmelCase_							):
      snake_case_         =   0
      for i in range(lowerCAmelCase_						,  min(block_start + block_size						,  len(lowerCAmelCase_							)							)							):
         block_int += message_bytes[i] * (BYTE_SIZE ** (i % block_size))
      block_ints.append(lowerCAmelCase_							)
   return block_ints



def      _lowerCAmelCase  (							lowerCAmelCase_							:list[int]						,  lowerCAmelCase_							:int						,  lowerCAmelCase_							:int = DEFAULT_BLOCK_SIZE							)->str:
   '''simple docstring'''






   snake_case_         =   []
   for block_int in block_ints:
      snake_case_         =   []
      for i in range(block_size - 1						,  -1						,  -1							):
         if len(lowerCAmelCase_							) + i < message_length:
            snake_case_         =   block_int // (BYTE_SIZE**i)
            snake_case_         =   block_int % (BYTE_SIZE**i)
            block_message.insert(0						,  chr(lowerCAmelCase_							)							)
      message.extend(lowerCAmelCase_							)
   return "".join(lowerCAmelCase_							)



def      _lowerCAmelCase  (							lowerCAmelCase_							:str						,  lowerCAmelCase_							:tuple[int, int]						,  lowerCAmelCase_							:int = DEFAULT_BLOCK_SIZE							)->list[int]:
   '''simple docstring'''






   snake_case_         =   []
   snake_case_      ,      snake_case_         =   key

   for block in get_blocks_from_text(lowerCAmelCase_						,  lowerCAmelCase_							):
      encrypted_blocks.append(pow(lowerCAmelCase_						,  lowerCAmelCase_						,  lowerCAmelCase_							)							)
   return encrypted_blocks



def      _lowerCAmelCase  (							lowerCAmelCase_							:list[int]						,  lowerCAmelCase_							:int						,  lowerCAmelCase_							:tuple[int, int]						,  lowerCAmelCase_							:int = DEFAULT_BLOCK_SIZE						,  )->str:
   '''simple docstring'''






   snake_case_         =   []
   snake_case_      ,      snake_case_         =   key
   for block in encrypted_blocks:
      decrypted_blocks.append(pow(lowerCAmelCase_						,  lowerCAmelCase_						,  lowerCAmelCase_							)							)
   return get_text_from_blocks(lowerCAmelCase_						,  lowerCAmelCase_						,  lowerCAmelCase_							)



def      _lowerCAmelCase  (							lowerCAmelCase_							:str							)->tuple[int, int, int]:
   '''simple docstring'''






   with open(lowerCAmelCase_							) as fo:
      snake_case_         =   fo.read()
   snake_case_      ,      snake_case_      ,      snake_case_         =   content.split(","							)
   return (int(lowerCAmelCase_							), int(lowerCAmelCase_							), int(lowerCAmelCase_							))



def      _lowerCAmelCase  (							lowerCAmelCase_							:str						,  lowerCAmelCase_							:str						,  lowerCAmelCase_							:str						,  lowerCAmelCase_							:int = DEFAULT_BLOCK_SIZE						,  )->str:
   '''simple docstring'''






   snake_case_      ,      snake_case_      ,      snake_case_         =   read_key_file(lowerCAmelCase_							)
   if key_size < block_size * 8:
      sys.exit(
          "ERROR: Block size is {} bits and key size is {} bits. The RSA cipher "
          "requires the block size to be equal to or greater than the key size. "
          "Either decrease the block size or use different keys.".format(
              block_size * 8						,  lowerCAmelCase_							)							)

   snake_case_         =   [str(lowerCAmelCase_							) for i in encrypt_message(lowerCAmelCase_						,  (n, e)						,  lowerCAmelCase_							)]

   snake_case_         =   ",".join(lowerCAmelCase_							)
   snake_case_         =   F'''{len(lowerCAmelCase_							)}_{block_size}_{encrypted_content}'''
   with open(lowerCAmelCase_						,  "w"							) as fo:
      fo.write(lowerCAmelCase_							)
   return encrypted_content



def      _lowerCAmelCase  (							lowerCAmelCase_							:str						,  lowerCAmelCase_							:str							)->str:
   '''simple docstring'''






   snake_case_      ,      snake_case_      ,      snake_case_         =   read_key_file(lowerCAmelCase_							)
   with open(lowerCAmelCase_							) as fo:
      snake_case_         =   fo.read()
   snake_case_      ,      snake_case_      ,      snake_case_         =   content.split("_"							)
   snake_case_         =   int(lowerCAmelCase_							)
   snake_case_         =   int(lowerCAmelCase_							)

   if key_size < block_size * 8:
      sys.exit(
          "ERROR: Block size is {} bits and key size is {} bits. The RSA cipher "
          "requires the block size to be equal to or greater than the key size. "
          "Did you specify the correct key file and encrypted file?".format(
              block_size * 8						,  lowerCAmelCase_							)							)

   snake_case_         =   []
   for block in encrypted_message.split(","							):
      encrypted_blocks.append(int(lowerCAmelCase_							)							)

   return decrypt_message(lowerCAmelCase_						,  lowerCAmelCase_						,  (n, d)						,  lowerCAmelCase_							)



def      _lowerCAmelCase  (							)->None:
   '''simple docstring'''






   snake_case_         =   "encrypted_file.txt"
   snake_case_         =   input(r"Encrypt\Decrypt [e\d]: "							)

   if response.lower().startswith("e"							):
      snake_case_         =   "encrypt"
   elif response.lower().startswith("d"							):
      snake_case_         =   "decrypt"

   if mode == "encrypt":
      if not os.path.exists("rsa_pubkey.txt"							):
         rkg.make_key_files("rsa"						,  1_024							)

      snake_case_         =   input("\nEnter message: "							)
      snake_case_         =   "rsa_pubkey.txt"
      print(F'''Encrypting and writing to {filename}...'''							)
      snake_case_         =   encrypt_and_write_to_file(lowerCAmelCase_						,  lowerCAmelCase_						,  lowerCAmelCase_							)

      print("\nEncrypted text:"							)
      print(lowerCAmelCase_							)

   elif mode == "decrypt":
      snake_case_         =   "rsa_privkey.txt"
      print(F'''Reading from {filename} and decrypting...'''							)
      snake_case_         =   read_from_file_and_decrypt(lowerCAmelCase_						,  lowerCAmelCase_							)
      print("writing decryption to rsa_decryption.txt..."							)
      with open("rsa_decryption.txt"						,  "w"							) as dec:
         dec.write(lowerCAmelCase_							)

      print("\nDecryption:"							)
      print(lowerCAmelCase_							)


if __name__ == "__main__":
   main()








def      _lowerCAmelCase  (							lowerCAmelCase_							:Dict						,  lowerCAmelCase_							:Optional[int]						,  lowerCAmelCase_							:Tuple							)->Optional[Any]:
   '''simple docstring'''






   assert b != 0, "This cannot accept modulo that is == 0"
   if n == 0:
      return 1

   if n % 2 == 1:
      return (bin_exp_mod(lowerCAmelCase_						,  n - 1						,  lowerCAmelCase_							) * a) % b

   snake_case_         =   bin_exp_mod(lowerCAmelCase_						,  n / 2						,  lowerCAmelCase_							)
   return (r * r) % b


if __name__ == "__main__":
   try:
      SCREAMING_SNAKE_CASE		:str											=       int(input('''Enter Base : ''').strip())
      SCREAMING_SNAKE_CASE		:List[Any]											=       int(input('''Enter Power : ''').strip())
      SCREAMING_SNAKE_CASE		:Dict											=       int(input('''Enter Modulo : ''').strip())
   except ValueError:
      print('''Invalid literal for integer''')

   print(bin_exp_mod(BASE, POWER, MODULO))




