Beste antwoord
Er zijn veel opties om een bestand in Python te versleutelen.
PyCrypto-bibliotheek gebruiken: PyCrypto is een verzameling veilige hashfuncties en verschillende versleutelingsalgoritmen. Installeer eerst PyCrypto pakket door dit commando uit te voeren op CMD
pip install pycrypto
De code voor bestandscodering met behulp van het AES-algoritme wordt hieronder getoond
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, "
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))
PyAesCrypt gebruiken: Python drie bestandscoderingsmodule die AES256-CBC gebruikt om bestanden te coderen en decoderen
pip install pyAesCrypt
Voorbeeldcode hieronder weergegeven:
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-bibliotheek kan ook een goede optie zijn voor codering
Antwoord
De gemakkelijkste manier om bestanden te versleutelen met Python is door cryptografie module.
1.Installatie:
pip/pip3 install cryptography
2.Code:
We hebben een videobestand genaamd " myvideo.mp4 " om het te versleutelen en het hoofdprogramma "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()
Probeer altijd het juiste sleutelbestand te gebruiken voor gegevensbestand, ofwel mislukt het zeker. Het duurt ongeveer 30 minuten om dit programma te schrijven. Stem mijn antwoord op.