Padded | Fody AddIn that allows declarative padding structures

by Scooletz C# Version: Current License: Apache-2.0

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | Padded Summary

Padded is a C# library. Padded has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Fody AddIn that allows declarative padding structures and classes to fight the false sharing problem.

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Support

Padded has a low active ecosystem.

It has 11 star(s) with 3 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

There are 0 open issues and 1 have been closed. On average issues are closed in 345 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of Padded is current.

Quality

Padded has no bugs reported.

Security

Padded has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

Padded is licensed under the Apache-2.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

Padded releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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Community Discussions

Trending Discussions on Padded

Encrypt in JS front end and decrypt in python backend using AES GCM

Text inside textform field is padded up

Web cryptography implement HKDF for the output of ECDH

Android Studio. Building signed APK. Get Key Failed

differences in bitmap or rasterized font bitmaps and text display on 3.5" TFT LCD

SwiftUI Button not responding when added Padding to it

How to use Serilog enrichers with log context

Prevent keyboard coming up when floating action button is pressed

right pad regex with spaces using sed or awk

Why do my FFT plots have these horizontal lines?

QUESTION

Encrypt in JS front end and decrypt in python backend using AES GCM

Asked 2021-Jun-14 at 18:01

I am trying encrypting in JS front end and decrypt in python backend using AES GCM cryptographic algorithm. I am using Web cryptography api for JS front end and python cryptography library for python backend as cryptographic library. I have fixed the IV for now in both side. I have implemented encryption-decryption code in both side, they work on each side. But I think the padding is done differently, can't seem to figure out how the padding is done in web cryptography api. Here is the encryption and decryption for the python backend:

...

ANSWER

Answered 2021-Jun-14 at 18:01

GCM is a stream cipher mode and therefore does not require padding. During encryption, an authentication tag is implicitly generated, which is used for authentication during decryption. Also, an IV/nonce of 12 bytes is recommended for GCM.

The posted Python code unnecessarily pads and doesn't take the authentication tag into account, unlike the JavaScript code, which may be the main reason for the different ciphertexts. Whether this is the only reason and whether the JavaScript code implements GCM correctly, is difficult to say, since the getMessageEncoding() method was not posted, so testing this was not possible.

Also, both codes apply a 16 bytes IV/nonce instead of the recommended 12 bytes IV/nonce.

Cryptography offers two possible implementations for GCM. One implementation uses the architecture of the non-authenticating modes like CBC. The posted Python code applies this design, but does not take authentication into account and therefore implements GCM incompletely. A correct example for this design can be found here.
Cryptography generally recommends the other approach for GCM (s. the Danger note), namely the AESGCM class, which performs implicit authentication so that this cannot be accidentally forgotten or incorrectly implemented.

The following implementation uses the AESGCM class (and also takes into account the optional additional authenticated data):

Source https://stackoverflow.com/questions/67963529

QUESTION

Text inside textform field is padded up

Asked 2021-Jun-14 at 05:57

I am observing that the text for the below form field somehow padded up. Also the cursor has become very small like a dot. Any ideas ?

I want the text field height same as the right side round button

...

ANSWER

Answered 2021-Jun-14 at 05:57

The reason for for the additional padding and the small cursor is the font height which you are setting to 0.1 (keep the default 1.0 if you don't want the additional padding).

You can fix the cursor issue by setting cursorHeight to match your original font size

Note: use cursorHeight only if you want to keep the height as 0.1

Source https://stackoverflow.com/questions/67965069

QUESTION

Web cryptography implement HKDF for the output of ECDH

Asked 2021-Jun-13 at 11:02

I want implement a elliptic curve diffie hellman using HKDF as key derivation function. I am using a python backend and (vanilla) javascript in frontend. I am using python cryptography library in backend and Web Crypto api in frontend as cryptographic library. I created ECDH key pair in both side and exchanged the pbulic keys. Now I am trying to create the AES shared key with the exchanged public key and private key along with HKDF algorithm. I am able to do it in the python backend (I followed this example for the python code):

...

ANSWER

Answered 2021-Jun-13 at 11:02

The referenced Python code uses P-384 (aka secp384r1) as elliptic curve. This is compatible with the WebCrypto API, which supports three curves P-256 (aka secp256r1), P-384 and P-521 (aka secp521r1), see EcKeyImportParams.

The following WebCrypto code generates a shared secret using ECDH and derives an AES key from the shared secret using HKDF. In detail the following happens:

To allow comparison of the derived key with that of the referenced Python code, predefined EC keys are applied. The private key is imported as PKCS#8, the public key as X.509/SPKI. Note that due to a Firefox bug concerning the import of EC keys, the script below cannot be run in the Firefox browser.
After the import the shared secret is created with ECDH using deriveBits() (and not deriveKey()).
The shared secret is imported with importKey() and then the AES key is derived using HKDF, again with deriveBits().

Source https://stackoverflow.com/questions/67938461

QUESTION

Android Studio. Building signed APK. Get Key Failed

Asked 2021-Jun-12 at 20:15

I've been building release versions of my app for months, and now all of a sudden I get this error.
Failed to read key ******** from store ***** Get Key Failed. Given final block not properly padded. Such issues can arise if a bad key is used during decryption.
This is beyond frustrating.

What I've done so far

Read every post on this error and tried every solution
Verified my passwords are correct
Checked and unchecked "save passwords"
Verified my keystore location is correct

...

ANSWER

Answered 2021-Jun-12 at 20:15

If you get error like block not properly padded, bad key or PKCS12 when signing the App Bundle or APK, try using the same password for the key and the keystore file, it works for me.

Source https://stackoverflow.com/questions/67949546

QUESTION

differences in bitmap or rasterized font bitmaps and text display on 3.5" TFT LCD

Asked 2021-Jun-12 at 16:19

I am using a 3.5: TFT LCD display with an Arduino Uno and the library from the manufacturer, the KeDei TFT library. The library came with a bitmap font table that is huge for the small amount of memory of an Arduino Uno so I've been looking for alternatives.

What I am running into is that there doesn't seem to be a standard representation and some of the bitmap font tables I've found work fine and others display as strange doodles and marks or they display upside down or they display with letters flipped. After writing a simple application to display some of the characters, I finally realized that different bitmaps use different character orientations.

My question

What are the rules or standards or expected representations for the bit data for bitmap fonts? Why do there seem to be several different text character orientations used with bitmap fonts?

Thoughts about the question

Are these due to different target devices such as a Windows display driver or a Linux display driver versus a bare metal Arduino TFT LCD display driver?

What is the criteria used to determine a particular bitmap font representation as a series of unsigned char values? Are different types of raster devices such as a TFT LCD display and its controller have a different sequence of bits when drawing on the display surface by setting pixel colors?

What other possible bitmap font representations requiring a transformation which my version of the library currently doesn't offer, are there?

Is there some method other than the approach I'm using to determine what transformation is needed? I currently plug the bitmap font table into a test program and print out a set of characters to see how it looks and then fine tune the transformation by testing with the Arduino and the TFT LCD screen.

My experience thus far

The KeDei TFT library came with an a bitmap font table that was defined as

...

ANSWER

Answered 2021-Jun-12 at 16:19

Raster or bitmap fonts are represented in a number of different ways and there are bitmap font file standards that have been developed for both Linux and Windows. However raw data representation of bitmap fonts in programming language source code seems to vary depending on:

the memory architecture of the target computer,
the architecture and communication pathways to the display controller,
character glyph height and width in pixels and
the amount of memory for bitmap storage and what measures are taken to make that as small as possible.

A brief overview of bitmap fonts

A generic bitmap is a block of data in which individual bits are used to indicate a state of either on or off. One use of a bitmap is to store image data. Character glyphs can be created and stored as a collection of images, one for each character in the character set, so using a bitmap to encode and store each character image is a natural fit.

Bitmap fonts are bitmaps used to indicate how to display or print characters by turning on or off pixels or printing or not printing dots on a page. See Wikipedia Bitmap fonts

A bitmap font is one that stores each glyph as an array of pixels (that is, a bitmap). It is less commonly known as a raster font or a pixel font. Bitmap fonts are simply collections of raster images of glyphs. For each variant of the font, there is a complete set of glyph images, with each set containing an image for each character. For example, if a font has three sizes, and any combination of bold and italic, then there must be 12 complete sets of images.

A brief history of using bitmap fonts

The earliest user interface terminals such as teletype terminals used dot matrix printer mechanisms to print on rolls of paper. With the development of Cathode Ray Tube terminals bitmap fonts were readily transferable to that technology as dots of luminescence turned on and off by a scanning electron gun.

Earliest bitmap fonts were of a fixed height and width with the bitmap acting as a kind of stamp or pattern to print characters on the output medium, paper or display tube, with a fixed line height and a fixed line width such as the 80 columns and 24 lines of the DEC VT-100 terminal.

With increasing processing power, a more sophisticated typographical approach became available with vector fonts used to improve displayed text quality and provide improved scaling while also reducing memory required to describe the character glyphs.

In addition, while a matrix of dots or pixels worked fairly well for languages such as English, written languages with complex glyph forms were poorly served by bitmap fonts.

Representation of bitmap fonts in source code

There are a number of bitmap font file formats which provide a way to represent a bitmap font in a device independent description. For an example see Wikipedia topic - Glyph Bitmap Distribution Format

The Glyph Bitmap Distribution Format (BDF) by Adobe is a file format for storing bitmap fonts. The content takes the form of a text file intended to be human- and computer-readable. BDF is typically used in Unix X Window environments. It has largely been replaced by the PCF font format which is somewhat more efficient, and by scalable fonts such as OpenType and TrueType fonts.

Other bitmap standards such as XBM, Wikipedia topic - X BitMap, or XPM, Wikipedia topic - X PixMap, are source code components that describe bitmaps however many of these are not meant for bitmap fonts specifically but rather other graphical images such as icons, cursors, etc.

As bitmap fonts are an older format many times bitmap fonts are wrapped within another font standard such as TrueType in order to be compatible with the standard font subsystems of modern operating systems such as Linux and Windows.

However embedded systems that are running on the bare metal or using an RTOS will normally need the raw bitmap character image data in the form similar to the XBM format. See Encyclopedia of Graphics File Formats which has this example:

Following is an example of a 16x16 bitmap stored using both its X10 and X11 variations. Note that each array contains exactly the same data, but is stored using different data word types:

Source https://stackoverflow.com/questions/67465098

QUESTION

SwiftUI Button not responding when added Padding to it

Asked 2021-Jun-12 at 12:35

    struct ContactView: View {
    
    @Binding var isContactViewActive: Bool
    @State var searchBar = ""
    
    var backgroundColor = Color(red: 14/255, green: 18/255, blue: 23/255, opacity: 1.0)
    
    var body: some View {
        NavigationView {
            ZStack {
                backgroundColor
                VStack {
                    HStack {
                        Button(action: {}, label: {
                            Image(systemName: "magnifyingglass").font(.title)
                        })
                        Spacer()
                        Text("FireChat")
                            .font(.title)
                            .fontWeight(.light)
                            .foregroundColor(Color.white)
                        Spacer()
                        Button(action: {}, label: {
                            Image(systemName: "power").font(.title)
                        })
                    }.padding(.top, 50)
                    Spacer()
                }
            }.edgesIgnoringSafeArea(.all)
        }
    }
}

...

ANSWER

Answered 2021-Jun-12 at 12:35

to be clear this is the code I'm using for testing:

Source https://stackoverflow.com/questions/67948344

QUESTION

How to use Serilog enrichers with log context

Asked 2021-Jun-10 at 15:49

Are Serilog enrichers - and LogEvent in particular - expected to be aware of properties pushed onto LogContext?

I have a property which is pushed onto the Serilog context:

...

ANSWER

Answered 2021-Jun-10 at 05:33

The problem was caused by my custom enricher being registered before Enrich.FromLogContext(); e.g.:

Source https://stackoverflow.com/questions/67913256

QUESTION

Prevent keyboard coming up when floating action button is pressed

Asked 2021-Jun-10 at 10:02

I have a row with a text field and a floating action button. Everytime i push the floating action button the text field is activated and the keyboard comes up. How can I prevent this behaviour? The floating action button triggers showing the device location on a map and the text field is for location search if you don´t allow location service or want to search on other places.

...

ANSWER

Answered 2021-Jun-10 at 10:02

I found the solution and it was my stupid mistake: I had the same code in an if/else for MediaQuery and forgotten to update it. In this else tree the floatingActionButton had been declared as suffixIcon instead of being part of a row.

Source https://stackoverflow.com/questions/67850541

QUESTION

right pad regex with spaces using sed or awk

Asked 2021-Jun-05 at 13:45

I have a file with two fields separated with :, both fields are varying length, second field can have all sort of characters(user input). I want the first field to be right padded with spaces to fixed length of 15 characters, for first field I have a working regex @.[A-Z0-9]{4,12}.

sample:

...

ANSWER

Answered 2021-Jun-05 at 10:32

With perl:

Source https://stackoverflow.com/questions/67848410

QUESTION

Why do my FFT plots have these horizontal lines?

Asked 2021-Jun-03 at 17:41

I'm new to Python and signal processing, and I'm having a problem with FFT.

I'm supposed to analyze a set of data and find the modulation frequencies from it. I wrote a basic FFT script to do this, and the output looked kinda weird. It does show the peaks like a normal FFT graph. However, for each line it has a horizontal line that connects the two ends, instead of the ends spreading out.

I would like to ask what might be the problem here.

This is my script:

...

ANSWER

Answered 2021-Jun-03 at 17:41

Answer: The graph look like that because of the order of the fft calculation output: it starts with 0 Hz (more details presented here: https://numpy.org/doc/stable/reference/generated/numpy.fft.fftfreq.html)

I fixed this by using numpy.fft.fftshift() function (more details presented here: https://numpy.org/doc/stable/reference/generated/numpy.fft.fftshift.html).

Solution has been suggested by @gavinb and @yanziselman.

Source https://stackoverflow.com/questions/67802878

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install Padded

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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