Hva er noen gode måter å kryptere filer ved hjelp av Python?


Beste svaret

Det er mange muligheter for å kryptere en fil i python.

Bruke PyCrypto-biblioteket: PyCrypto er en samling sikre hash-funksjoner og forskjellige krypteringsalgoritmer. Installer først PyCrypto pakke ved å kjøre denne kommandoen på CMD

pip install pycrypto

Koden for filkryptering ved hjelp av AES-algoritme er vist nedenfor

import os, random, struct

from Crypto.Cipher import AES

def encrypt\_file(key, in\_filename, out\_filename=None, chunksize=64*1024):

""" Encrypts a file using AES (CBC mode) with the

given key.

key:

The encryption key - a string that must be

either 16, 24 or 32 bytes long. Longer keys

are more secure.

in\_filename:

Name of the input file

out\_filename:

If None, ".enc" will be used.

chunksize:

uses to read and encrypt the file. Larger chunk

sizes can be faster for some files and machines.

chunksize must be divisible by 16.

"""

if not out\_filename:

out\_filename = in\_filename + ".enc"

iv = "".join(chr(random.randint(0, 0xFF)) for i in range(16))

encryptor = AES.new(key, AES.MODE\_CBC, iv)

filesize = os.path.getsize(in\_filename)

with open(in\_filename, "rb") as infile:

with open(out\_filename, "wb") as outfile:

outfile.write(struct.pack("

outfile.write(iv)

while True:

chunk = infile.read(chunksize)

if len(chunk) == 0:

break

elif len(chunk) \% 16 != 0:

chunk += " " * (16 - len(chunk) \% 16)

outfile.write(encryptor.encrypt(chunk))

Bruke PyAesCrypt: Python tre filkrypteringsmodul som bruker AES256-CBC til å kryptere og dekryptere filer

pip install pyAesCrypt

Eksempelkode vist nedenfor:

import pyAesCrypt

# encryption/decryption buffer size - 64K

bufferSize = 64 * 1024

password = "foopassword"

# encrypt

pyAesCrypt.encryptFile("data.txt", "data.txt.aes", password, bufferSize)

# decrypt

pyAesCrypt.decryptFile("data.txt.aes", "dataout.txt", password, bufferSize)

Python Cryptography-biblioteket kan også være et godt alternativ for kryptering

Svar

Den enkleste måten å kryptere filer med python vil være å bruke kryptografi -modul.

1.Installasjon:

pip/pip3 install cryptography

2.Kode:

Vi vil ha en videofil som heter “ myvideo.mp4 ” for å kryptere det og hovedprogrammet “main.py” .

"""

filename: main.py

author: SANDIPAN CHOWDHURY

purpose: Encrypting any file

This program is posted on Quora on 9th January, 2021

"""

#imports

from cryptography.fernet import Fernet

def sancrypt(filename):

"This function Encrypt the file"

key=Fernet.generate\_key()

key\_master=Fernet(key)

with open (filename,"rb") as f:

data=f.read()

encr\_data=key\_master.encrypt(data)

with open(filename+".sancrypted","wb") as f:

f.write(encr\_data)

with open(filename+".key","wb") as f:

f.write(key)

def desancrypt(filename,keyfilename):

"This function decrypt the filename with keyfilename"

with open(filename,"rb") as f:

encr\_data=f.read()

with open(keyfilename,"rb") as f:

key=f.read()

keymaster=Fernet(key)

decr\_data=keymaster.decrypt(encr\_data)

with open(filename.replace(".sancrypted",""),"wb") as f:

def main():

x=input("""

1. Encrypt

2. Decrypt

Enter a number?

""")

if x=="1":

filename=input("Enter a filename: ")

try:

sancrypt(filename)

print("File Encrypted.")

main()

except Exception as e:

print("File Encryption Failed")

print(str(e))

main()

elif x=="2":

filename=input("Enter filename with ".sancrypted" extension: ")

keyfile=input("Enter filename with ".key" extension: ")

try:

desancrypt(filename,keyfile)

print("File Decrypted.")

main()

except Exception as e:

print("Decryption Failed.")

print(str(e))

main()

else:

print("Invalid Input. Must be 1 or 2")

main()

if \_\_name\_\_=="\_\_main\_\_":

main()

Forsøk alltid å bruke riktig nøkkelfil for riktig datafilen, enten mislykkes den helt sikkert. Det tar omtrent 30 minutter å skrive dette programmet. Vennligst oppstem svaret mitt.

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