docs: def decrypt_ige(cipher_text, key, iv):
          """
          Decrypts the given text in 16-bytes blocks by using the
          given key and 32-bytes initialization vector.
          """
          if cryptg:
              return cryptg.decrypt_ige(cipher_text, key, iv)
          if libssl.decrypt_ige:
              return libssl.decrypt_ige(cipher_text, key, iv)
  
          iv1 = iv[:len(iv) // 2]
          iv2 = iv[len(iv) // 2:]
  
          aes = pyaes.AES(key)
  
          plain_text = []
          blocks_count = len(cipher_text) // 16
  
          cipher_text_block = [0] * 16
          for block_index in range(blocks_count):
              for i in range(16):
                  cipher_text_block[i] = \
                      cipher_text[block_index * 16 + i] ^ iv2[i]
  
              plain_text_block = aes.decrypt(cipher_text_block)
  
              for i in range(16):
                  plain_text_block[i] ^= iv1[i]
  
              iv1 = cipher_text[block_index * 16:block_index * 16 + 16]
              iv2 = plain_text_block
  
              plain_text.extend(plain_text_block)
  
          return bytes(plain_text)