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Questions - signature

JAVA How to verify ECDSA signature when r or s are negative

I'm writing a chunk of code to check the signature My code below works if r and s are positive if not the verify fails. My code is PublicKey publicKey = cert.getPublicKey(); Signature ecdsaVerify = Si...
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Ariakan

java

cryptography

bouncycastle

signature

ecdsa

Votes: 0

Answers: 1

Latest Answer

The reason of the issue is not that r and/or s start with a byte >= 0x80, but that the message messNOT is UTF-8 encoded during verification. The verification for the problematic message messNOT is ...
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Topaco

Having trouble embedding base64 encoded png file into outlook signature via html

I'm having trouble embedding a base64 encoded png file into outlook signature via java/html. It recently stopped working the way it used to and I think some Windows update is the reason as to why it s...
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dbuergi

java

html

base64

png

signature

Votes: 0

Answers: 0

C-patex api says: Invalid signature

I am trying to create a crypto bot for the c-patex exchange on Pascalabc. I'm stuck on private requests using a key and a secret key. I get an error - {"error":{"code":2005,"m...
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Peter

c#

api

pascal

signature

hmac

Votes: 0

Answers: 1

Latest Answer

Im solved this. Problem was in Unix time, because i get it from server with big latensy. var unixTime := System.DateTimeOffset.UtcNow.ToUnixTimeMilliseconds; This code work fine, because it uses loca...
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Peter

I need to differentiate methods that have the same signature in java

i have many similar methods like this delete(String ProfilePrimaryKey) delete(String PostPrimaryKey) delete(String CommentPrimaryKey) they all access the database in a different way and call for a di...
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to ma tpo pa

java

generics

polymorphism

overloading

signature

Votes: 0

Answers: 0

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