signing | Digital signing toolkit
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kandi X-RAY | signing Summary
Digital signing toolkit
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of signing
signing Key Features
signing Examples and Code Snippets
Lines of Code : 54
License : No License
Copy// OAuth1.0 - 3-legged server side flow (Twitter example)
// step 1
const qs = require('querystring')
, oauth =
{ callback: 'http://mysite.com/callback/'
, consumer_key: CONSUMER_KEY
, consumer_secret: CONSUMER_SECRET
}
, url = 'h public static byte[] signData(byte[] data, final X509Certificate signingCertificate, final PrivateKey signingKey) throws CertificateEncodingException, OperatorCreationException, CMSException, IOException {
byte[] signedMessage = null;
public SigningKeyResolver getSigningKeyResolver() {
return signingKeyResolver;
} Community Discussions
Trending Discussions on signing
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
After upgrading to android 12, the application is not compiling. It shows
"Manifest merger failed with multiple errors, see logs"
Error showing in Merged manifest:
Merging Errors: Error: android:exported needs to be explicitly specified for . Apps targeting Android 12 and higher are required to specify an explicit value for
android:exportedwhen the corresponding component has an intent filter defined. See https://developer.android.com/guide/topics/manifest/activity-element#exported for details. main manifest (this file)
I have set all the activity with android:exported="false". But it is still showing this issue.
My manifest file:
...ANSWER
Answered 2021-Aug-04 at 09:18I'm not sure what you're using to code, but in order to set it in Android Studio, open the manifest of your project and under the "activity" section, put android:exported="true"(or false if that is what you prefer). I have attached an example.
QUESTION
I want to sign a JWS (json web signature) with a private key generated through Ed25519 on a clients device. Then send this signature to my backend and verify it with the public key.
To get familiar with the procedure I want to try to sign and verify a JWS in node js.
Both my private and public key are already generated and are available in base58. This is my current attempt at signing a JWT with an Ed25519 privateKey:
ANSWER
Answered 2022-Feb-17 at 20:49You need your keys in a format that Node.js recognizes. KeyObject create*Key APIs recognize and the key is supported in - for Ed25519 keys that is, assuming Node.js >= 16.0.0:
- PEM/DER in SPKI for public keys
- PEM/DER in PKCS8 for private keys
- JWK for both public and private keys
Here's a snippet that uses DER.
QUESTION
After coming across something similar in a co-worker's code, I'm having trouble understanding why/how this code executes without compiler warnings or errors.
...ANSWER
Answered 2022-Feb-09 at 07:17References can't bind to objects with different type directly. Given const int& s = u;, u is implicitly converted to int firstly, which is a temporary, a brand-new object and then s binds to the temporary int. (Lvalue-references to const (and rvalue-references) could bind to temporaries.) The lifetime of the temporary is prolonged to the lifetime of s, i.e. it'll be destroyed when get out of main.
QUESTION
We're having some strange issue with our app and/or Testflight since a few days ago: our app runs fine on simulator and devices (iOS 12, iOS 14 & iOS 15) when run from Xcode, but it crashed at launch when we archive and distribute it via Testflight for iOS 14 and below, but NOT for iOS 15 (we haven't tried to actually release to the AppStore). The app was working perfectly fine on iOS 12+ until then, on Testflight or otherwise. No crash log is ever generated by these crashes (either on Crashlytics, or Organizer, or even in the device crash logs), and what's more mysterious is that when re-archiving past versions of the code that had no issues 3 weeks ago and are live on the app store, we are now getting the crashes. We've dug into the device logs to try and get some more info, and we could find
...ANSWER
Answered 2021-Dec-13 at 15:35I got this working. I used an older version of Xcode (12.5.1) to archive a build. New build (archived from older version of Xcode) from TestFlight is working on iOS 14+ and iOS 15+.
QUESTION
Hello I am trying to transfer a custom SPL token with the solana-wallet adapter. However i am having trouble getting the wallet's secret key/signing the transaction.
I've looked at these answers for writing the transfer code but i need to get the Singer and i have trouble figuring out how with solana-wallet adapter. These examples hardcode the secret key and since i'm using a wallet extension this is not possible.
How can you transfer SOL using the web3.js sdk for Solana?
How to transfer custom token by '@solana/web3.js'
according to this issue on the webadapter repo https://github.com/solana-labs/wallet-adapter/issues/120 you need to:
- Create a @solana/web3.js Transaction object and add instructions to it
- Sign the transaction with the wallet
- Send the transaction over a Connection
But i am having difficulty finding examples or documentation as to how to do step 1 and 2.
...ANSWER
Answered 2021-Dec-06 at 13:51So i found a way to do this, it requires some cleanup and error handling but allows for a custom token transaction via @solana/wallet-adapter.
QUESTION
I try to make an ESDT token issuance transaction using the following Python code
...ANSWER
Answered 2021-Dec-26 at 16:11You use str(0.05 * 10**18) to get the string for the value.
However, this actually outputs the value in scientific notation, which isn't what the blockchain expects.
QUESTION
I'm switching from the pure Python ecdsa library to the much faster coincurve library for signing data. I would also like to switch to coincurve for verifying the signatures (including the old signatures created by the ecdsa library).
It appears that signatures created with ecdsa are not (always?) valid in coincurve. Could someone please explain why this is not working? Also, it seems that cryptography library is able to validate both ecdsa signatures and coincurve signatures without issues, consistently.
What is even more confusing, if you run below script a few times, is that sometimes it prints point 3 and other times it does not. Why would coincurve only occasionally find the signature valid?
ANSWER
Answered 2021-Dec-25 at 14:41Bitcoin and the coincurve library use canonical signatures while this is not true for the ecdsa library.
What does canonical signature mean?
In general, if (r,s) is a valid signature, then (r,s') := (r,-s mod n) is also a valid signature (n is the order of the base point).
A canonical signature uses the value s' = -s mod n = n - s instead of s, i.e. the signature (r, n-s), if s > n/2, s. e.g. here.
All signatures from the ecdsa library that were not been successfully validated by the coincurve library in your test program have an s > n/2 and thus are not canonical, whereas those that were successfully validated are canonical.
So the fix is simply to canonize the signature of the ecdsa library, e.g.:
QUESTION
Uploading an iOS app to App Store Connect with Xcode (Automatically manage signing) and received this error:
The following errors occurred while locating and generating signing assets. ...
Communication with Apple failed. You haven't been given access to cloud-managed distribution certificates. Please contact your team's Account Holder or an Admin to give you access. If you need further assistance, contact Apple Developer Program Support at https://developer.apple.com/support
I have checked:
- the cert is installed and valid
- I have access to Certificates, Identifiers & Profiles
ANSWER
Answered 2021-Oct-18 at 01:45the cert is installed and valid
That doesn't matter. New in Xcode 13, if you choose Automatic signing, Apple tries to do cloud-based signing; it doesn't even see the certificate that's on your computer.
But you do not have the cloud-based signing privilege, so it fails.
You have two choices:
Get the privilege. It is really worth it, because cloud-based signing is great! It allows you to distribute from an archive to App Store Connect without having any distribution identity or distribution certificate at all. This totally solves the problem that there's only one distribution certificate at a time.
Switch to manual signing. Now the distribution certificate on your computer will be used. You'll need explicit access to the distribution profile too, obviously; the whole export resigning will be manual. That might be simplest if you're in a hurry.
QUESTION
I have a Python backend that generates public/private keys, generates a payload, then needs to get that payload signed by the client (ReactJS or pure JS), which is later verified.
The implementation in Python looks like this:
Imports
...ANSWER
Answered 2021-Dec-18 at 11:56CryptoJS only supports symmetric encryption and therefore not ECDSA. WebCrypto supports ECDSA, but not secp256k1.
WebCrypto has the advantage that it is supported by all major browsers. Since you can use other curves according to your comment, I will describe a solution with a curve supported by WebCrypto.
Otherwise, sjcl would also be an alternative, a pure JavaScript library that supports ECDSA and especially secp256k1, s.here.
WebCrypto is a low level API that provides the functionality you need like key generation, key export and signing. Regarding ECDSA WebCrypto supports the curves P-256 (aka secp256r1), P-384 (aka secp384r1) and p-521 (aka secp521r1). In the following I use P-256.
The following JavaScript code generates a key pair for P-256, exports the public key in X.509/SPKI format, DER encoded (so it can be sent to the Python site), and signs a message:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install signing
Include the Web/3skey.js file into your webpage ```html <script type="text/javascript" src="3skey.js"></script> ```
Include the applet tag ```html <div style="visibility:hidden"> <applet name="pdiApplet" code="com.swift.pdi.applet.TokenApplet" archive="pdiapplet.jar"> </applet> </div> ``` - Initialize it and Sign
Add the Signing DLL as a reference in your project. Import the Signing namespace. Import the Signing.Util namespace if needed.
Add the Signing DLL as a reference in your project
Import the Signing namespace
Import the Signing.Util namespace if needed
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