


import os
import sys

from . import rsa_key_generator as rkg

_snake_case				=			1_2_8
_snake_case				=			2_5_6







def 	A (		A__		,		A__ = DEFAULT_BLOCK_SIZE			):
     UpperCAmelCase    :					str			=      message.encode("ascii"			)

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







def 	A (		A__		,		A__		,		A__ = DEFAULT_BLOCK_SIZE			):
     UpperCAmelCase    :					list[str]			=      []
     for block_int in block_ints:
          UpperCAmelCase    :					list[str]			=      []
          for i in range(block_size - 1		,		-1		,		-1			):
               if len(A__			) + i < message_length:
                    UpperCAmelCase    :					str			=      block_int // (BYTE_SIZE**i)
                    UpperCAmelCase    :					List[Any]			=      block_int % (BYTE_SIZE**i)
                    block_message.insert(0		,		chr(A__			)			)
          message.extend(A__			)
     return "".join(A__			)







def 	A (		A__		,		A__		,		A__ = DEFAULT_BLOCK_SIZE			):
     UpperCAmelCase    :					str			=      []
     UpperCAmelCase	,			UpperCAmelCase    :					List[Any]			=      key

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







def 	A (		A__		,		A__		,		A__		,		A__ = DEFAULT_BLOCK_SIZE		,		):
     UpperCAmelCase    :					Any			=      []
     UpperCAmelCase	,			UpperCAmelCase    :					Dict			=      key
     for block in encrypted_blocks:
          decrypted_blocks.append(pow(A__		,		A__		,		A__			)			)
     return get_text_from_blocks(A__		,		A__		,		A__			)







def 	A (		A__			):
     with open(A__			) as fo:
          UpperCAmelCase    :					Optional[int]			=      fo.read()
     UpperCAmelCase	,			UpperCAmelCase	,			UpperCAmelCase    :					Dict			=      content.split(","			)
     return (int(A__			), int(A__			), int(A__			))







def 	A (		A__		,		A__		,		A__		,		A__ = DEFAULT_BLOCK_SIZE		,		):
     UpperCAmelCase	,			UpperCAmelCase	,			UpperCAmelCase    :					List[Any]			=      read_key_file(A__			)
     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		,		A__			)			)

     UpperCAmelCase    :					Any			=      [str(A__			) for i in encrypt_message(A__		,		(n, e)		,		A__			)]

     UpperCAmelCase    :					Any			=      ",".join(A__			)
     UpperCAmelCase    :					Union[str, Any]			=      f'{len(A__			)}_{block_size}_{encrypted_content}'
     with open(A__		,		"w"			) as fo:
          fo.write(A__			)
     return encrypted_content







def 	A (		A__		,		A__			):
     UpperCAmelCase	,			UpperCAmelCase	,			UpperCAmelCase    :					Any			=      read_key_file(A__			)
     with open(A__			) as fo:
          UpperCAmelCase    :					Optional[Any]			=      fo.read()
     UpperCAmelCase	,			UpperCAmelCase	,			UpperCAmelCase    :					List[Any]			=      content.split("_"			)
     UpperCAmelCase    :					List[Any]			=      int(A__			)
     UpperCAmelCase    :					str			=      int(A__			)

     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		,		A__			)			)

     UpperCAmelCase    :					Optional[int]			=      []
     for block in encrypted_message.split(","			):
          encrypted_blocks.append(int(A__			)			)

     return decrypt_message(A__		,		A__		,		(n, d)		,		A__			)







def 	A (		):
     UpperCAmelCase    :					List[str]			=      "encrypted_file.txt"
     UpperCAmelCase    :					Tuple			=      input(R"Encrypt\Decrypt [e\d]: "			)

     if response.lower().startswith("e"			):
          UpperCAmelCase    :					Any			=      "encrypt"
     elif response.lower().startswith("d"			):
          UpperCAmelCase    :					List[Any]			=      "decrypt"

     if mode == "encrypt":
          if not os.path.exists("rsa_pubkey.txt"			):
               rkg.make_key_files("rsa"		,		1_0_2_4			)

          UpperCAmelCase    :					List[Any]			=      input("\nEnter message: "			)
          UpperCAmelCase    :					List[Any]			=      "rsa_pubkey.txt"
          print(f'Encrypting and writing to {filename}...'			)
          UpperCAmelCase    :					List[str]			=      encrypt_and_write_to_file(A__		,		A__		,		A__			)

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

     elif mode == "decrypt":
          UpperCAmelCase    :					List[Any]			=      "rsa_privkey.txt"
          print(f'Reading from {filename} and decrypting...'			)
          UpperCAmelCase    :					int			=      read_from_file_and_decrypt(A__		,		A__			)
          print("writing decryption to rsa_decryption.txt..."			)
          with open("rsa_decryption.txt"		,		"w"			) as dec:
               dec.write(A__			)

          print("\nDecryption:"			)
          print(A__			)


if __name__ == "__main__":
      main()







from __future__ import annotations

import sys







def 	A (		A__		,		A__			):
     # base cases
     if abs(A__			) == 1:
          return a, 0
     elif abs(A__			) == 1:
          return 0, b

     UpperCAmelCase	,			UpperCAmelCase    :					Any			=      a, b
     UpperCAmelCase	,			UpperCAmelCase    :					List[Any]			=      1, 0
     UpperCAmelCase	,			UpperCAmelCase    :					Union[str, Any]			=      0, 1

     while remainder != 0:
          UpperCAmelCase    :					Union[str, Any]			=      old_remainder // remainder
          UpperCAmelCase	,			UpperCAmelCase    :					Dict			=      remainder, old_remainder - quotient * remainder
          UpperCAmelCase	,			UpperCAmelCase    :					int			=      coeff_a, old_coeff_a - quotient * coeff_a
          UpperCAmelCase	,			UpperCAmelCase    :					Optional[Any]			=      coeff_b, old_coeff_b - quotient * coeff_b

     # sign correction for negative numbers
     if a < 0:
          UpperCAmelCase    :					Union[str, Any]			=      -old_coeff_a
     if b < 0:
          UpperCAmelCase    :					int			=      -old_coeff_b

     return old_coeff_a, old_coeff_b







def 	A (		):
     if len(sys.argv			) < 3:
          print("2 integer arguments required"			)
          return 1
     UpperCAmelCase    :					Union[str, Any]			=      int(sys.argv[1]			)
     UpperCAmelCase    :					Any			=      int(sys.argv[2]			)
     print(extended_euclidean_algorithm(A__		,		A__			)			)
     return 0


if __name__ == "__main__":
      raise SystemExit(main())



