how to create a password protected folder/file in linux using python

Question

i would like to create a password protected files(with some extentions) in a folder n when exer a new file is created in the folder it should be auto encrypted n password protected in linux using python i have tried with pycrypto i can encrypt but i cant password protect the folder so plz help me with this here is the complete prog

def discover():
#file_path = ''
#print file_path
    for root, dirs, files in os.walk(r'/root/Desktop/rakesh/rakeshp/dlp'):
       for file_name in files:
           file_path = os.path.join(root, file_name)
#print file_path        
file_list = []          
if file_path.endswith('.py'):
file_list.append(file_path)
dict = {}
status=""
for p in file_list:
    if not os.access(p, os.F_OK):
    dict[p]=status=status+"NOEXISTS"
    if(os.access(p,os.R_OK)):
    dict[p]=status=status+"READ," 
    if(os.access(p, os.W_OK)):
    dict[p]=status=status+"WRITE," 
    if (os.access(p, os.X_OK)):
    dict[p]=status=status+"EXECUTE"  
    elif os.access(p, os.F_OK) and not (os.access(p,os.R_OK)) and not (os.access(p, os.W_OK)) and not   (os.access(p, os.X_OK)):
    dict[p]=status=status="NOACCESS"
    status="" # Set blank before we enter the loop again            
    os.chmod(file_path,0444)                    
    for size in file_list:              
    size = os.path.getsize(file_path)       
    #print size                 
    #print (dict)
    in_filename = file_path
    #print in_filename
    if not out_filename:
    out_filename = in_filename + '.enc'
    iv = 16 * '\x00'
    #iv = bytes([random.randint(0, 0xFF) for i in range(16)])
    #print iv
    encryptor = AES.new(key, AES.MODE_CBC, iv)
    with open(in_filename, 'rb') as infile:
        with open(out_filename, 'wb') as outfile:
        outfile.write(struct.pack('<Q', size))
        outfile.write(iv)
        while True:
            chunk = infile.read(chunksize)
            if len(chunk) == 0:
            #print (chunk)
            break
            elif len(chunk) % 16 != 0:
            chunk += ' ' * (16 - len(chunk) % 16)
            #print (chunk)
            outfile.write(encryptor.encrypt(chunk))

if __name__ == "__main__":
    discover()

Answer 1

IMHO it depends what you mean by password protection. If you want to restrict access to an user based on a password, then all you need to do is to create the user and perform a chown on the file. Then the user has to be logged in on the system to be able to access it.

Otherwise, you could try something based on this question and encrypt the file based on the hash of the password.