ftpencrypt.py

def encrypt(filepath):
	print "[!] Starting Encryption...."
	aes_key = os.urandom(32)			
	out_filename = filepath + ".enc"
	filehash = hashlib.md5(open(filepath).read()).hexdigest()		
	
	public_key_loc = PUB_KEY_LOC
	
	pubkey = open(public_key_loc, "r").read()			
	rsakey = RSA.importKey(pubkey)						
	rsakey = PKCS1_OAEP.new(rsakey)						
	encKey = rsakey.encrypt(aes_key)					
	outFile = open(out_filename,"w+")					
	
	outFile.write(filehash)							
	
	outFile.write(encKey)							
	
	iv = ''.join(chr(random.randint(0, 0xFF)) for i in range(16))	
	encryptor = AES.new(aes_key, AES.MODE_CBC, iv)	
	filesize = os.path.getsize(filepath)			
	chunksize=64*1024								
	
	with open(filepath, 'rb') as infile:
		outFile.write(struct.pack('<Q', filesize)) 	
		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))		
	
	outFile.close()
	print "[+] Encryption successful!"
	return out_filename