import os, json

import dict2xml

from dict2xml import dict2xml

from pyDes import *

import bz2

import boto3

# Parameters

xml_dir = "xmls/file.xml"

password = '12345678'

bucketName = "s3bucketname"

s3_file = "enc_file.xml"

# The decryption function

def decrypt(data,password):

k = des(password, CBC, "\0\0\0\0\0\0\0\0", pad=None, padmode=PAD_PKCS5)

d = k.decrypt(data)

return d

# Download the encrypted file from S3 bucket

s3 = boto3.resource('s3')

try:

s3.Bucket(bucketName).download_file(s3_file, xml_dir)

except botocore.exceptions.ClientError as e:

if e.response['Error']['Code'] == "404":

print("The object does not exist.")

else:

raise

# Execute the above function to decrypt the file and store it

enc_file = open(xml_dir,'rb')

decrypted_data = decrypt(enc_file.read(),password)

decrypted_file = open(xml_dir,'wb')

decrypted_file.write(decrypted_data)

decrypted_file.close()