Updated `.gitignore` to exclude new files and directories, including `FodyWeavers.xsd` and `appsettings.Secrets.json`.
Refactored `PdfDigitalSignatureService`:
- Improved signing time handling by calculating fallback inline.
- Simplified `SignPdfAsync` by inlining signature building.
- Added `ParseByteRanges` to extract `/ByteRange` values from PDFs.
- Introduced `CoversWholeDocument` to validate document coverage.
Enhanced signature validation:
- Integrated `ParseByteRanges` and `CoversWholeDocument`.
- Streamlined `PdfSignatureCheckItemDto` construction.
- Updated properties to calculate values inline.
- Improved `Unchanged` property to check cryptographic validity and document coverage.
These changes enhance maintainability, readability, and functionality.
Introduced a cryptographic infrastructure for PDF signing and validation using PKCS#11-based hardware security modules (HSMs) or software tokens. Key changes include:
- Added `PdfDigitalSignatureService` for signing PDFs, multi-signature support, and signature validation.
- Implemented `Pkcs11ExternalSigner` and `Pkcs11PdfSigningRsa` for PKCS#11-based signing with DevExpress PDF infrastructure.
- Added utilities like `Pkcs11SessionRunner`, `Pkcs11InteropBootstrap`, and `Pkcs11ToolBridge` for session management, library initialization, and fallback mechanisms.
- Introduced `Pkcs11Options` for managing PKCS#11 configurations.
- Updated project dependencies to include `DevExpress.Document.Processor`, `System.Security.Cryptography.Pkcs`, and `Pkcs11Interop`.
- Enhanced error handling and fallback support for PKCS#11 operations.
These changes enable robust and extensible PDF signing capabilities with detailed signature metadata extraction and validation.
A new project, `EnvelopeGenerator.Infrastructure.Crypt`, has been added to the solution. This project targets `.NET 8.0` and includes several `Microsoft.Extensions` dependencies (e.g., `Configuration.Binder`, `DependencyInjection.Abstractions`, etc.) and the `Pkcs11Interop` package.
The solution file (`EnvelopeGenerator.sln`) has been updated to include the new project, its build configurations, and its nesting under the same parent as `EnvelopeGenerator.Infrastructure.Doc`.
Updated README.md for clarity and added official references. Introduced detailed infrastructure and integration plans for FES, including phased implementation, deployment options, and risk mitigations. Added FES workflow diagrams in draw.io and PDF formats. Documented SoftHSM testing process and integration details in ticket.md. Improved alignment with clean architecture principles and production readiness.
Added a detailed README for the `EnvelopeGenerator.Infrastructure.Crypt` project, explaining its purpose, functionality, and integration with PKCS#11-based cryptographic workflows.
Highlights include:
- Overview of the project's role in FES workflows.
- Explanation of SoftHSM and PKCS#11 deployment patterns.
- Mapping of functionality to FES diagram steps 6-8.
- Documentation of service interfaces and DI entry point.
- Configuration guidance with JSON examples and security best practices.
- Instructions for obtaining PKCS#11 values and setting up SoftHSM.
- Checklist for IT handover and environment setup.
- Steps for running cryptographic tests with PowerShell and Linux examples.
- Common failure diagnostics and their meanings.
- Clarification of signing semantics and validation requirements.
- FAQ addressing common questions about SoftHSM and PKCS#11 usage.
This update ensures clear guidance for developers and IT teams to configure and integrate the cryptographic layer effectively.
