Закрыт

android ecdsa secp256k1 signature

I need an android app where you enter an ECDSA Secp256k1 private key and use it to sign a string.

Maybe using bouncycastle library.

The signature should be verifiable in php, using:

$data='teststring';

$pkey=openssl_pkey_get_public($public_key);

$res=openssl_verify($data,$signature,$pkey,OPENSSL_ALGO_SHA256);

Example public/private key pair:

-----BEGIN PUBLIC KEY-----

MFYwEAYHKoZIzj0CAQYFK4EEAAoDQgAEPfs0WCAFryKbEAOU5ScUqMm9iFmDEMi1

h2iEG5f3D/y+SrT3Q2pwyIXApphW82nZTs0wv9vzghqjA0zrsbIVJQ==

-----END PUBLIC KEY-----

-----BEGIN EC PRIVATE KEY-----

MIIBCwIBAQQgJ6TxAzr3IXM5u5M16+smwl/oDSpe3ycrWv7MgPfUyvqggeMwgeAC

AQEwLAYHKoZIzj0BAQIhAP////////////////////////////////////7///wv

MEQEIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABCAAAAAAAAAAAAAA

AAAAAAAAAAAAAAAAAAAAAAAAAAAABwRBBHm+Zn753LusVaBilc6HCwcCm/zbLc4o

2VnygVsW+BeYSDradyajxGVdpPv8DhEIqP0XtEimhVQZnEfQj/sQ1LgCIQD/////

///////////////+uq7c5q9IoDu/0l6M0DZBQQIBAQ==

-----END EC PRIVATE KEY-----

Квалификация: Android, Java, Mobile App Development, PHP, Архитектура ПО

Показать больше I have android application and I need to add some additional features on it , I have android application and I need to add some additional features on it in freelancer, I have existing android app which is 80% build completed. I\ ll provide the source code for existing app need to update UI and f, ecdsa java, secp256r1 java, java ecdsa verify, bouncy castle ecdsa example, secp256k1 c++, ecdsa implementation in java, bouncycastle ecdsa sign, bouncycastle verify signature ecdsa, www kuyhaa android com read more i need a password to extract the fifa manager 13 password to extract fifa manager 13 ask me fas, i would like someone to design my logo for use on my website and email signature i have a clear idea of what i want thanks, i need to hire a private investigator, i need app templates, i need app developer, i need app designs, i have a smartphone design i just need a manufacturer, i desperately need a job, i am need of a prgrammer

О работодателе:
( 38 отзыв(-а, -ов) ) Bucuresti, Romania

ID проекта: #16649278

3 фрилансеров(-а) в среднем готовы выполнить эту работу за $177

mekiho

Dear employer. As a senior android native expert, I am very interesting in your project. I 'd like fast work and clean coding so you can get cost result soon. also I have some experiences in ECDSA Secp256k1. Pleas Больше

$155 USD за 3 дней(-я)
(97 отзывов(-а))
7.5
phonedroidapps

Greetings, WE WILL DO THIS WORK AS PER YOUR REQUIREMENT AND EXPECTATIONS. With the experience of over 1600+ web development projects including ANDROID , iOS , WEBSITES , WEB APPLICATIONS AND SOFTWARES we are the fa Больше

$222 USD за 3 дней(-я)
(14 отзывов(-а))
7.1
$155 USD за 3 дней(-я)
(36 отзывов(-а))
4.6