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demo-batch-zip.py
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#!/usr/bin/env vpython3
import os
import sys
import getopt
import configparser
import hashlib
import zipfile
from base64 import b64encode
if 1:
from cryptography.hazmat.backends import default_backend
backend = default_backend()
else:
from cryptography.hazmat.backends.openssl.backend import backend
from cryptography.hazmat.primitives import serialization, padding, asymmetric
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
class Main:
def __init__(self, server, user):
self.server = server
self.user = user
self.config = configparser.ConfigParser()
self.config.read('ksef.ini')
self.key = os.urandom(256 // 8)
self.iv = os.urandom(16)
self.encryptor = Cipher(algorithms.AES(self.key), modes.CBC(self.iv), backend=backend).encryptor()
def encryptmf(self, data):
pemdata=self.config.get(self.server, 'publickey')
public_key = serialization.load_pem_public_key(
pemdata.encode()
)
return public_key.encrypt(
data,
asymmetric.padding.PKCS1v15()
)
def encrypt(self, data):
padder = padding.PKCS7(algorithms.AES(self.key).block_size).padder()
padded_data = padder.update(data) + padder.finalize()
return self.encryptor.update(padded_data)
def compress(self, files):
fnameprefix = 'ksefbatch'
fnamezip = '{}.zip'.format(fnameprefix)
with zipfile.ZipFile(fnamezip, mode='w', compression=zipfile.ZIP_DEFLATED) as zf:
for fname in files:
zf.write(fname)
os.rename(fname, 'send-{}'.format(fname))
fnamepartfmt = '''\
<ns2:PackagePartSignature>
<ns3:OrdinalNumber>{nbno}</ns3:OrdinalNumber>
<ns3:PartFileName>{fnamepart}</ns3:PartFileName>
<ns3:PartFileHash>
<HashSHA>
<Algorithm>SHA-256</Algorithm>
<Encoding>Base64</Encoding>
<Value>{fnamepartsha256}</Value>
</HashSHA>
<FileSize>{fnamepartsize}</FileSize>
</ns3:PartFileHash>
</ns2:PackagePartSignature>\
'''
fnamesha256 = hashlib.sha256()
fnamezipsize = 0
fnamezipe = '{}.zip-enc'.format(fnameprefix)
with open(fnamezip, 'rb') as fi:
with open(fnamezipe, 'wb') as fo:
while True:
data = fi.read(4*1024*1024)
if not data:
break
fnamesha256.update(data)
fnamezipsize = len(data)
edata = self.encrypt(data)
assert edata != data
fo.write(edata)
fo.write(self.encryptor.finalize())
fnameparts = []
fnamesplitsize = 49*1024*1024
fnamesplitsize = 1024
nbno = 0
with open(fnamezipe, 'rb') as fe:
while True:
data = fe.read(fnamesplitsize)
if not data:
break
nbno += 1
fnamepart = '{}.zip-enc-{}'.format(fnameprefix, nbno)
with open(fnamepart, 'wb') as fo:
fo.write(data)
fnamepartsha256 = hashlib.sha256(data).digest()
fnameparts.append(fnamepartfmt.format(
nbno=nbno,
fnamepart=fnamepart,
fnamepartsha256=b64encode(fnamepartsha256).decode('ascii'),
fnamepartsize=len(data)
))
fnamesha256 = fnamesha256.digest()
fnameparts = '\n'.join(fnameparts)
xml = '''\
<ns2:InitRequest
xmlns="http://ksef.mf.gov.pl/schema/gtw/svc/types/2021/10/01/0001"
xmlns:ns2="http://ksef.mf.gov.pl/schema/gtw/svc/batch/init/request/2021/10/01/0001"
xmlns:ns3="http://ksef.mf.gov.pl/schema/gtw/svc/batch/types/2021/10/01/0001">
<ns2:Identifier xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="SubjectIdentifierByCompanyType">
<Identifier>{nip}</Identifier>
</ns2:Identifier>
<ns2:DocumentType>
<Service>KSeF</Service>
<FormCode>
<SystemCode>FA (2)</SystemCode>
<SchemaVersion>1-0E</SchemaVersion>
<TargetNamespace>http://crd.gov.pl/wzor/2023/06/29/12648/</TargetNamespace>
<Value>FA</Value>
</FormCode>
</ns2:DocumentType>
<ns2:Encryption>
<EncryptionKey>
<Encoding>Base64</Encoding>
<Algorithm>AES</Algorithm>
<Size>256</Size>
<Value>{key64}</Value>
</EncryptionKey>
<EncryptionInitializationVector>
<Encoding>Base64</Encoding>
<Bytes>16</Bytes>
<Value>{iv64}</Value>
</EncryptionInitializationVector>
<EncryptionAlgorithmKey>
<Algorithm>RSA</Algorithm>
<Mode>ECB</Mode>
<Padding>PKCS#1</Padding>
</EncryptionAlgorithmKey>
<EncryptionAlgorithmData>
<Algorithm>AES</Algorithm>
<Mode>CBC</Mode>
<Padding>PKCS#7</Padding>
</EncryptionAlgorithmData>
</ns2:Encryption>
<ns2:PackageSignature>
<ns2:Package>
<ns3:PackageType>split</ns3:PackageType>
<ns3:CompressionType>zip</ns3:CompressionType>
<ns3:Value>{fnamezip}</ns3:Value>
</ns2:Package>
<ns2:PackageFileHash>
<HashSHA>
<Algorithm>SHA-256</Algorithm>
<Encoding>Base64</Encoding>
<Value>{fnamesha256}</Value>
</HashSHA>
<FileSize>{fnamezipsize}</FileSize>
</ns2:PackageFileHash>
<ns2:PackagePartsList>
{fnameparts}
</ns2:PackagePartsList>
</ns2:PackageSignature>
</ns2:InitRequest>
'''.format(
nip=self.config.get(self.user, 'nip'),
key64=b64encode(self.encryptmf(self.key)).decode('ascii'),
iv64=b64encode(self.iv).decode('ascii'),
fnamezip=fnamezip,
fnamesha256=b64encode(fnamesha256).decode('ascii'),
fnameparts=fnameparts,
fnamezipsize=fnamezipsize,
)
fnamexml = '{}.xml'.format(fnameprefix)
open(fnamexml, 'wt').write(xml)
return fnamexml
def main():
server = 'ksef-demo'
user = 'user'
opts, args = getopt.getopt(sys.argv[1:], '', [
'server=',
'user=',
])
for o, a in opts:
if o == '--server':
server = a
elif o == '--user':
user = a
cls = Main(server, user)
cls.compress(args)
main()