conceal | Conceal provides easy Android APIs for performing fast | Encryption library
kandi X-RAY | conceal Summary
kandi X-RAY | conceal Summary
Conceal provides a set of Java APIs to perform cryptography on Android. It was designed to be able to encrypt large files on disk in a fast and memory efficient manner. The major target for this project is typical Android devices which run old Android versions, have low memory and slower processors. Unlike other libraries, which provide a Smorgasbord of encryption algorithms and options, Conceal prefers to abstract this choice and use sane defaults. Thus Conceal is not a general purpose crypto library, however it aims to provide useful functionality.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of conceal
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Community Discussions
Trending Discussions on conceal
QUESTION
I'm experimenting with Chaum's blind signature, and what I'm trying to do is have the blinding and un-blinding done in JavaScript, and signing and verifying in Java (with bouncy castle). For the Java side, my source is this, and for JavaScript, I found blind-signatures. I've created two small codes to play with, for the Java side:
...ANSWER
Answered 2021-Dec-13 at 14:56The blind-signature library used in the NodeJS code for blind signing implements the process described here:
BlindSignature.blind()
generates the SHA256 hash of the message and determines the blind message m' = m * re mod N.BlindSignature.sign()
calculates the blind signature s' = (m')d mod N.BlindSignature.unblind()
determines the unblind signature s = s' * r-1 mod N.BlindSignature.verify()
decrypts the unblind signature (se) and compares the result with the hashed message. If both are the same, the verification is successful.
No padding takes place in this process.
In the Java code, the implementation of signing the blind message in signConcealedMessage()
is functionally identical to BlindSignature.sign()
.
In contrast, the verification in the Java code is incompatible with the above process because the Java code uses PSS as padding during verification.
A compatible Java code would be for instance:
QUESTION
By default when a new SharePoint site is created and reports are requested in graph API the result is returned with corrupted/modified data. This requires updating organization settings for the data conceal. Where can I find this setting?
...ANSWER
Answered 2022-Mar-03 at 21:56Login to Admin Center. Navigate to Settings >> Org Settings >> Services >> Reports, uncheck “Display concealed user, group, and site names in all reports” checkbox and save to solve the issue.
QUESTION
I've been longing to ask this a while now but I thought of first trying to find a solution myself which apparently failed. Every time I try doing Navigator.of(context).pop() to go back to the previous page that I navigated from, I end up getting a black screen instead. I wonder what I'm doing wrong and how this can be fixed? The code and the screenshots are given below:
This is the screen that I intend to Navigate from. The aim is to go to the Cart Screen and back. Clicking on the Add to Cart button takes us to the Cart Screen(For obvious reasons, I had to conceal everything. Apologies in advance)
This is the Cart Screen. Clicking the back button should take us back to the previous screen.
I get a black screen instead of navigating back to where I came from.
The code is as follows: This is the code snippet from the screen that has the Add To Cart button on it which navigates to the Cart Screen.
...ANSWER
Answered 2022-Feb-25 at 19:53Use push instead of pushReplacement. pushReplacement replaces the first screen so when you try to pop back, there's nothing there.
Bonus Tip: You can use the BackButton widget instead of creating your own with an InkWell.
QUESTION
I'm trying to stream Punchh webhook JSON data through kinesis delivery stream to multiple S3 buckets but it is giving me this error. However, when I streamed Iterable webhook data, the Iterable S3 buckets are successfully filled with the data from the deliverable stream sent from the Iterable wehbook.
Here is the error:
An error occurred (ValidationException) when calling the PutRecord operation: 1 validation error detected: Value 'data/landing/vendor/punchh/punchh_to_dd/ex_points_reminder' at 'deliveryStreamName' failed to satisfy constraint: Member must satisfy regular expression pattern: [a-zA-Z0-9_.-]+
Note: The S3 prefix value -in bold- that the error mentioned above is similar to the Iterable prefixes I have successfully tested .
Here is the Punchh S3 prefix for one of the streams causing the error:
data/landing/vendor/punchh/punchh_to_dd/ex-points-reminder/year=!{timestamp:yyyy}/month=!{timestamp:MM}/day=!{timestamp:dd}/hour=!{timestamp:HH}/dynamic
Here is the Punch S3 stream destination (note X is used as a place holder to conceal the real address which is irrelative):
arn:aws:firehose:us-west-2:XXXXXXXXXXXX:deliverystream/lou-punchh-ex-points-reminder-events
Here is the Python Code for the proxy (backend) Lambda (Similar code for Punchh as Iterable) . I have several dynamic S3 buckets paired with their respective delivery streams:
...
ANSWER
Answered 2022-Feb-20 at 04:51As per the error message python code is passing data/landing/vendor/punchh/punchh_to_dd/ex_points_reminder
value to deliveryStreamName
parameter in PutRecord
request. I dont think thats the name of your delivery stream. Check values for environments variable that are populating deliveryStreamName
parameter
QUESTION
I have a large list and I am trying to create multiple data frames from the same. For that I'm filtering out data in various variables. Basic structure of most of code is same and all are working fine except for one.
This the list.
...ANSWER
Answered 2022-Jan-20 at 10:35In a regular expression parentheses are special characters which are used for grouping. Hence, if you want to search for a string containing parentheses you have to escape them using \\(
and \\)
:
QUESTION
I have more than 1000 XML files that probably have the same structure. I want to create a database using data in all the files. I have never known how an XML file looked before yesterday. With the help of Google, I tried using the r-packages to load a single XML file in RStudio. But when I'm trying to convert that into a data frame, an error is occurring.
This is how file looks like: File A
...ANSWER
Answered 2021-Dec-31 at 10:26You cannot directly convert XML
file to a dataframe
. You'll need to fetch the tags and data inside those tags and then create the dataframe
.
Here's the code that will do the trick:
QUESTION
i'm new and after finishing my site i realized the parts i created are not responsive is there a way to fix it without starting from scratch?
...ANSWER
Answered 2021-Dec-14 at 18:18Because you are using vw in certain places, this unit takes a fixed percentage of browser size of 50vw mean 500px of 1000px screen and 50px of 100px screen, I would suggest to use rem instead also, you can go a bit advanced and use css clamp() to fix width of multiple screen at once.
QUESTION
One of the ways WebDriver
identifies itself as a bot to external websites is by setting the webdriver-active flag to true.
A user on SO suggested that it is possible modify Chrome Driver
source code to remove all bot-identifying attributes (see this and this response).
Is it possible to achieve a similar outcome w/ Firefox by modifying the source code of Geckodriver
, Firefox WebDriver
or perhaps both? I'm asking because there is currently no way to conceal WebDriver using Firefox Options without source code modification.
If we can somehow remove bot identifying features from the source code, we can prevent WebDriver
from being identified as a bot without needing to bundle TOR with Firefox.
While there's no getting around the fact that Selenium (in its present state) identifies itself, surely we can modify source code to remove all identification similar to how it's achieved in Chrome Driver?
...ANSWER
Answered 2021-Nov-28 at 21:11In the discussion Can a website detect when you are using Selenium with chromedriver? as suggested by different users to open the ChromeDriver in a Hex Editor and edit the document variables replacing the cdc_
and $wdc_
string might be possible, but achiving the same with GeckoDriver may not be possible.
Moreover, the commands like execute_cdp_cmd() and Python libraries like selenium-stealth may not be currently supported by GeckoDriver.
The GeckoDriver source code can be easily downloaded from mozilla / geckodriver page both in zip
and tar.gz
format. If you are on windows system you can unzip the downloaded file and find the the source code of different modules in the ...\geckodriver-0.30.0\src
directory:
Additionally, geckodriver is made available under the Mozilla Public License. GeckoDriver source code can also be found in mozilla-central under testing/geckodriver.
WebDriver SpecificationsNow as per WebDriver W3C Editor's Draft:
The webdriver-active flag is set to
true
when the user agent is under remote control. It is initiallyfalse
.
So there can be two possible ways to keep webdriver
flag as false
as:
- Remove the
readonly
attribute, so can be edited runtime. (as discussed in this answer) - Strangle the WebDriver from emitting the signals that the user agent is under remote control.
To me the second option looks pretty much viable as the most frequently updated tier is the second tier (Selenium WebDriver.dll
and WebDriver.Support.dll
modules). Since App Studio uses C#
and .Net
version 4.0 (before Selenium 4.1.0 (November 22, 2021)) to communicate with Selenium, you need to download the .Net 4.0 version of the Selenium modules. The current stable version being 4.1.0. Once the zip file is downloaded, extract the content to a folder and navigate to the net40
subfolder.
Now, you can copy the WebDriver.dll
and WebDriver.Support.dll
files to the bin
folder of the App Studio installation. e.g, C:\ibi\AppStudio82\bin
and make the required changes.
As an alternative, you can also download the NuGet, copy the .Net 4.0
content of the NuGet package into the bin folder of the App Studio installation and make the required changes.
QUESTION
I read this portion from a book called C++ Primer Plus
(Page no. 400. Chapter:8 - Adventures in Functions)
...A second method is to use
new
to create new storage. You've already seen examples in whichnew
creates space for a string and the function returns a pointer to that space. Here's how you chould do something similar with a referece:
ANSWER
Answered 2021-Nov-27 at 12:17As far as I know for best practices you should never dereference a pointer without initializing it
That's not just a "best practice", but it's absolutely mandatory to not do so. You must never indirect through an uninitiliased pointer.
How the new operator is automatically called when calling the function ?
new
operator isn't called.
QUESTION
I was refactoring my React app after updating React Router to v6 and I got rid of the error I was getting in my routes, except now the desired layout is broken.
I need to include a permanent toolbar and a sidebar to be visible only in some pages. I tried to follow the docs but now the layout component is placed above all the pages it should be wrapping, not just overlapping them, but actually concealing them behind it.
The Layout component:
...ANSWER
Answered 2021-Nov-15 at 23:49Layout
should render an Outlet
for the children Routes
to be rendered into.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install conceal
Use Maven Central: Available on maven central under com.facebook.conceal:conceal:2.0.1@aar as an AAR package. If you use Android Studio and select the library using the UI, make sure to change build.gradle to include the @aar suffix. Otherwise the library won't be included.
Build using gradle
Use prebuilt binaries: http://facebook.github.io/conceal/documentation/. (linked documentation needs update)
Starting with v1.1 recommended encryption will use a 256-bit key (instead of 128-bit). This means stronger security. You should use this default. If you need to read from an existing file, you still will need 128-bit encryption. You can use the old way of creating Crypto objects as it preserves its 128-bit behavior. Although ideally you should re-encrypt that content with a 256-bit key. Also there's an improved way of creating Entity object which is platform independent. It's strongly recommended for new encrypted items although you need to stick to the old way for already encrypted content. We recommend the use of the factory class AndroidConceal.
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