subtle | Rust traits and utilities for constant-time cryptographic | Cryptography library
kandi X-RAY | subtle Summary
kandi X-RAY | subtle Summary
This library aims to be the Rust equivalent of Go’s crypto/subtle module. The optimization barrier in impl From for Choice was based on Tim Maclean's work on rust-timing-shield, which attempts to provide a more comprehensive approach for preventing software side-channels in Rust code. subtle is authored by isis agora lovecruft and Henry de Valence.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of subtle
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subtle Examples and Code Snippets
Lines of Code : 66
License : No License
Copyclass Toggler extends React.Component {
constructor(...args) {
super(...args);
this.state = { on: false };
}
toggle() {
this.setState(({ on }) => ({ on: !on }));
}
render() {
const { on } = this.state;
return ({on ? class Toggler extends React.Component {
constructor(...args) {
super(...args);
this.state = { on: false };
}
toggle() {
this.setState(({ on }) => ({ on: !on }));
}
render() {
const { on } = this.state;
return ({on ? def assert_no_legacy_layers(layers):
"""Prevent tf.layers.Layers from being used with Keras.
Certain legacy layers inherit from their keras analogs; however they are
not supported with keras and can lead to subtle and hard to diagnose bugs.
Community Discussions
Trending Discussions on subtle
QUESTION
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 18:01GCM 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):
QUESTION
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 11:02The 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 notderiveKey()). - The shared secret is imported with
importKey()and then the AES key is derived using HKDF, again withderiveBits().
QUESTION
Let me start with the working code that I'm trying to refactor. I'm trying to abstract button creation, and whatever I try, I keep getting the "hooks can only be called inside of the body of a functional component" error.
Following along with a tutorial, I've setup a navigation bar and a button that will take me from the home screen to a "Details" screen. Here's what works:
...ANSWER
Answered 2021-Jun-11 at 17:29You were pretty close. Your factory should look like this:
QUESTION
I wanted to import an ECDSA private key in Chrome to sign some data, tried yet with crypto.subtle.importKey: feeded the importKey with a derivated private key using secp256k1.
When trying to use the lib, I got stuck with the following error:
Cannot create a key using the specified key usages.
The code:
...ANSWER
Answered 2021-Jun-10 at 15:15Web Cryptography API does not support the secp256k1 curve. It will also not support it in the future.
QUESTION
I have a function that works under C++14 using the date.h library but I'm converting my program to use C++20 and it's no longer working. What am I doing wrong, please?
My C++14/date.h code is as follows:
...ANSWER
Answered 2021-Jun-09 at 14:45There's a bug in the spec that is in the process of being fixed. And VS2019 faithfully reproduced the spec. Wrap your format string in string{}, or give it a trailing s literal to turn it into a string, and this will work around the bug.
QUESTION
I'm trying to verify a HMAC signature received from a WebHook. The details of the WebHook are https://cloudconvert.com/api/v2/webhooks#webhooks-events
This says that the HMAC is generated using hash_hmac (PHP) and is a SHA256 hash of the body - which is JSON. An example received is:
c4faebbfb4e81db293801604d0565cf9701d9e896cae588d73ddfef3671e97d7
This looks like lowercase hexits.
I'm trying to use Cloudflare Workers to process the request, however I can't verify the hash. My code is below:
...ANSWER
Answered 2021-Jun-08 at 08:32I finally got this working using the verify method (I had previously tried the verify method, but it didn't work). The main problem seems to the use of request.json() wrapped in JSON.stringify. Changing this to request.text() resolved the issue. I can then use JSON.parse to access the data after verifying the signature. The code is as follows:
QUESTION
In one of his great video, Jon Gjengset implements a mutex to notably understand the effect of std::sync::atomic::Ordering. The code is very simple : create a mutex that holds an integer and start many threads to add 1 to the integer concurrently and see the results. The code is here (I reproduce stricly Jon example) : https://github.com/fmassot/atomics-rust
When using correct ordering, we expect the program to make additions atomically and check the result as the sum of all added values. The code does several times on each thread the following actions :
- call compare_exchange_weak with Ordering::Acquire to get the lock
- on success increment the value by one
- release the lock with Ordering::Release
Unfortunately it does not seem to work on linux/x86_64 nor on macbook/arm64.
The results when running cargo r --release are sometimes correct, sometimes wrong like this:
ANSWER
Answered 2021-Jun-06 at 22:47Problem solved, solution given by @user4815162342
The same value was used for LOCKED and UNLOCKED so there was no lock at all.
Conclusion, the error was stupid and coming from me...
QUESTION
I have a project which I can run with Maven but not with Gradle. The project consists of one very simple entity and data.sql file where a table for this entity gets populated with initial data. When I try to run this project with Maven - everything is ok. But when I try to run the same code but as a Gradle project I am getting an error, saying that insert in data.sql can not be done as the table for the entity does not exist. If I remove data.sql and run project one more time - table is created. After the table is created I can run the project one more time with data.sql and it will populate the table. So it seems like Maven project runs data.sql after entity tables are created and in Gradle it happens other way around. Why so? Maybe I wrongly assume that my Maven and Gradle configurations are the same and there are some subtle difference? Thanks a lot for your answers in advance.
Maven pom file:
...ANSWER
Answered 2021-Jun-05 at 06:01You have one major difference between your 2 configuration. With maven you use Spring boot version 2.2.4, with gradle 2.5.0
Since 2.5.0 i believe there was a change in the order of database operation when starting a Spring boot app.
You can either fix your version with 2.2.4 ans change nothing. Or set the property spring.jpa.defer-datasource-initialization=true and it should work in 2.5
Ref link : https://docs.spring.io/spring-boot/docs/current/reference/html/howto.html#howto.data-initialization
QUESTION
When I download audio from youtube via youtube-dl:
A) if I type -f bestaudio I get webm files which can't contain musical metadata and can't be played by most apps.
B) if I type -f bestaudio --extract-audio --add-metadata I get opus files which contain musical metadata and can be play by most apps.
I conclude Opus is more useful. However webm and opus files often appear to be slightly different on Spek and so I get doubtful since I don't know how to read such subtle difference.
Questions
Is someone able to explain me in casual language what is occurring in the process within youtube-dl when doing it with option A and when doing it with option B?
Which one is finer? Quality as when played online full on is a must, not simply to have fun listening to.
Is there any other info that could help me assure to download best unprocessed audio with youtube-dl?
I wish someone is able to help me, I thank you very much in advance! :)
...ANSWER
Answered 2021-Jan-01 at 12:41webm is a media container similar to mkv, opus is a audio format which can be included in the webm among with video, other audio tracks and subtitles etc..
opus seems to have higher bitrate (better quality) than offered by youtube-dl/newpipe but not so great hardware support, that does not matter for your pc and phone though.
youtube does not offer uncompressed audio/video
QUESTION
I am trying to import an elliptic curve private key from PEM encoding. The following code works fine on Chrome but does not work with Firefox. It says:
...ANSWER
Answered 2021-May-28 at 09:16I am answering my own question for case someone find it useful. As suggested by Michael a possible workaround is to use "jsrsasign" library and KEYUTIL functions. After having installed jsrsasign, the following code imports ECDSA private key on both Chrome and Firefox.
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Install subtle
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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