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Questions tagged [rsa-sha256]

56 questions
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How do I create the padded message for use in the SHA256-2 algorithm?

I am trying to understand the SHA-2 algorithm. And it seems that its a bit vague on how people are encoding the message 'L' (see wikipedia's SHA256-2 pseudo code). Is the message encoded in ASCII, UTF-8, or UTF-16? I understand that technically…
Dan Krueger
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How to Sign a String using RSA Private Key Android Kotlin

We are facing issue on Signing String using Private RSA Key val key:'-----BEGIN RSA PRIVATE KEY-----ASDSADSAADSDASA-----END RSA PRIVATE KEY-----'; val data:'DATA TO BE SIGNED'; val privateKeyPEM = key .replace("-----BEGIN RSA PRIVATE…
Kashyap Patel
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Validating RS256 signature with PHP

I am having trouble verifying an RS256 signature in PHP from a JWT. I have $to_verify = substr(Cookie::get('CF_Authorization'), 0, strrpos(Cookie::get('CF_Authorization'), ".")); $signature = base64_decode(explode('.',…
php-ryan
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Problems to write a byte array of a signed hash with a private key in a text file and get it back as the same format

I'm writing a bytes array to a text file of a signed hash, that I first convert to a base64 string and convert to a bytes array again with the encoding UTF-8 before writing to the text file, my current problem is that when I get the bytes back I…
Rudy Silva
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Convert String in Hash SHA-256 format with NUL(e.g. "/000")

Using JMETER, I would like to convert below String in SHA - 256 Hash key notation 624111NUL2021-10-06T11:35:39-04:00NULs3cr3tNUL, The correct supposed to be 7c3f952cdd1d6bf56a2762c5bb94add00883654794d27344f1dd55e5901f381c while using below hash…
Narendra
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Generate JSON Web Token (RS256) to access DocuSign using Google Apps Script

I am trying to send envelopes from Docusign using only Apps Script. function createJWT(){ const header = { alg: 'RS256', typ: 'JWT', }; const now = Date.now(); const expires = new Date(now); expires.setHours(expires.getHours() +…
AttiER
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OpenSSL RSA_sign C++ - Different sign than the command line

I am trying to develop a Digital Signature tool using OpenSSL's libs but the created sign from my code is different than the one I get from the command line. I checked and validated that the SHA256 digest is correct. This is an example of the…
Eleni Ioakim
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RSA-SHA256 Signature mismatches

I'm working on an implementation of EWP (Erasmus Without Papers), a set of API's for communication between universities world wide. Every call must be signed with RSA-SHA256. Every partner has a private and public key, the public keys are available…
Joep Demey
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Verify RSA-SHA256 xml in PHP (Signing in .NET and Verifying in PHP)

I Receive XML request, contains MsgBody Tag, and Signature (the signing process done in .net), I have to Verify the msg body they sent, with the signature, and the requester public key, but i cant. my code is : $msg_body =…
Mohamed Alfar
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C# code needed for RSA-SHA256 decryption with public key

I need help to implement EWP (https://developers.erasmuswithoutpaper.eu/). I have set up some API's and use an online validator tool by EWP to test them. Everything is working now, except for 1 thing: the signature verification. I have a few methods…
Joep Demey
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Can't verify signed data with public key C#

I have an application that needs to sign certain data and then confirm that the signature is valid. The algorithm to use is RSA SHA 256. I have a certificate with its respective private key in the Windows certificate store. I have searched in…
pabdat08
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Equivalent SecurityAlgorithmSuite in .Net Core

I am migrating a project from .Net framework 4.8 to .Net Core 3.1. The problem is that this Basic256 algorithm is not compatible with Net Core SecurityAlgorithmSuite.Basic256Sha256Rsa15 Do you know any equivalent libraries?
Manuel Palacio
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java and auth0: Token signature invalid exception

I'm trying to varify a jwt in java, I have used similar code to this post: Java - Auth0 JWT Verification - Is this correct? public void parseJWTKey(HttpHeaders header) { try { Jwk jwk = getPublicKey(); //method to…
Boots
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Is there a way to create hash(sha256) for images in Yocto's swupdate layer?

My objective is, To create sha256 for all the required files(which go into .swu) To Sign sw-description file with RSA algorithm. My .swu consists: kernel Image - bzImage rootfile system - panther2-usb-panther2.ext4 software description file -…
Raxesh Oriya
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Java. Cannot import SHA256withRSA signature from import java.security.Signature

I'm trying to initialize SHA256withRSA Signature object: Signature signer = Signature.getInstance("SHA256withRSA"); But compiler generates NoSuchAlgorithmException, but when I run this code: import java.security.Signature; public static void…
alexandrgomd
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