Я пытался расшифровать файл в android, зашифрованный с помощью python, Вот код python, который я использовал в расшифровке.file encrypt in python decrypt in android
import os, random, struct
from Crypto.Cipher import AES
import sys
import hashlib
print("trying")
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, '<in_filename>.enc' will be used.
chunksize:
Sets the size of the chunk which the function
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 + '.mjt'
iv = 16 * '\x00'
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('<Q', filesize))
# outfile.write(iv)
outfile.write(bytes(iv, 'UTF-8'))
while True:
chunk = infile.read(chunksize)
if len(chunk) == 0:
break
elif len(chunk) % 16 != 0:
chunk += b' ' * (16 - len(chunk) % 16)
outfile.write(encryptor.encrypt(chunk))
# outfile.write(bytes(encryptor.encrypt(chunk), 'UTF-8'))
def main():
filename1 = sys.argv[-2]
filename2 = sys.argv[-1]
key = 'abcdef'
encrypt_file(key, filename1, filename2)
print("done")
if __name__ == '__main__':
main()
и вот мой андроид функция пытается расшифровать с
private static byte[] ivBytes = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
public static void decrypt(String inputFile, String outputFile, String password) throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException {
FileInputStream fis = new FileInputStream(inputFile);
FileOutputStream fos = new FileOutputStream(outputFile);
IvParameterSpec iv = new IvParameterSpec(ivBytes);
SecretKeySpec sks = new SecretKeySpec(password.getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
cipher.init(Cipher.DECRYPT_MODE, sks, iv);
CipherInputStream cis = new CipherInputStream(fis, cipher);
int b;
byte[] d = new byte[1024];
while((b = cis.read(d)) != -1) {
fos.write(d, 0, b);
}
fos.flush();
fos.close();
cis.close();
}
это дает при использовании AES/CBC/NoPadding java.io.IOException: data not block size aligned
и при использовании AES/CBC/PKCS5Padding, он дает java.io.IOException: last block incomplete in decryption
работал Thankx :) –