Contact person: PP

Phone:Show

Email:Show

Location: Remote Cooperation

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"OverviewWe need a standalone library for MS SQL Server persistence to integrate into our system running on .NET Framework 4.8, using the KSeF C# client library. The main focus is on secure hashing and encryption for payloads sent to KSeF, ensuring high priority data integrity and security.Scope of work- Develop a .NET Framework 4.8 class library for MS SQL Server persistence.- Implement SHA-256 hashing for integrity verification of payloads.- Utilize AES-256 encryption for storing payloads securely.- Store cryptographic metadata including algorithm, IV, and key ID.- Ensure ability to decrypt and validate hash upon reading back.- Integrate library with existing KSeF.Client.- Provide database schema and scripts for integration.- Develop repositories/services for storing and retrieving KSeF data.- Include documentation and usage examples.References-https://github.com/CIRFMF/ksef-client-csharp/tree/mainAdditional informationThe project has a high priority for secure data handling. It's essential to follow encryption standards closely to ensure no secrets or tokens are stored in plain text.Database platformMS SQLDatabase typeRelational databaseDeveloper expertiseEncryption, SQL" (client-provided description)

Additional information:"According to documentation on Krajowy System e-Faktur (https://ksef.mf.gov.pl/) we need to create a standalone library for MS SQL Server that can be integrated with our ERP. The library according to official project on GitHub - CIRFMF/ksef-client-csharp (https://github.com/CIRFMF/ksef-client-csharp) should ensure to sign and encrypt xml documents in our ERP which will be send to official KSeF authority by ERP system.
We need compiled library ready for use according to official documentation:
KSeF 2.0 client implementation, demo application and implementation of usage scenarios in .NET (https://github.com/CIRFMF/ksef-client-csharp)" (admin-provided information)