API to generate digital signature to XML UBL electronic invoice

We have actually a “Invoicing System” developed in Powerbuilder, now laws in my country changed and we need implement an “Electroning invoicing” interfase to our system, for that is necessary to have a process to convert invoces to XML UBL format and create a hash to encrypt and sign digitally this document using a digital certificate with a private and public keys.

Then,,,,,,, the project is to create an API or any process (can be in C++, java or other) that generate the hash and the digital signature for the xml created for the system, the APi or process must be compatible to add or can interact with our system in power builder (we can do the process to communicate with the API)

Skills: C++ Programming, Cryptography, Digital Design, Electronic Forms, Java

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About the Employer:
( 2 reviews ) Lima, Peru

Project ID: #7236017

6 freelancers are bidding on average $318 for this job


Security Experts Here! We can create this API for you. So first lets see the current system. Please buzz us when you are online. Why you SHOULD hire us? 1. We are a registered Software firm in Sri Lanka(Ranked #1 o More

$444 USD in 7 days
(26 Reviews)

Hi, I am certainly very much interested into this project. Please send me necessary urls where I can find all the details and other details. Thank you.

$250 USD in 7 days
(45 Reviews)

Hi, I have 7 years experience in programming and certified by Microsoft and Freelancer. I am very familiar with API programming and worked on many APIs like ebay, BigCommerce, Shopify, google, twtitter, facebook, insta More

$222 USD in 5 days
(24 Reviews)

A proposal has not yet been provided

$210 USD in 3 days
(15 Reviews)

What is the Signature Format / Standard you need implemented? I have MS in Information Security with research interest of Cryptography. I have implemented Cryptography algorithms in Java and C, written security More

$888 USD in 20 days
(6 Reviews)

Hi, if I understand correctly, what you need is a XML signature for your XML files ([login to view URL]). I have made such apps in the past for a US customer that needed signatures for FATCA XML More

$185 USD in 2 days
(3 Reviews)

Services I can offer : - C,C++,C#.NET,[login to view URL], PHP, Python. - VMware Administration. - Network Administration. - Microsoft Systems Administration. - Linux Systems Administration. - DataBases (MSSQL, MYSQL). More

$133 USD in 3 days
(4 Reviews)

A proposal has not yet been provided

$155 USD in 3 days
(0 Reviews)