iTextSharp 5.5.8

iText 被 Java、.NET、Android 與 GAE 開發者用來為他們的應用程式加入 PDF 功能。iTextSharp 是 .NET 的移植版本。

iText 是一個 PDF 函式庫，讓開發者能夠建立、調整、檢查與維護可攜式文件格式（PDF）的文件。透過使用 iText，開發者可以根據 XML 檔案或資料庫中的資料來產生文件與報表。此外，還能建立地圖與書籍，並運用 PDF 中提供的多種互動功能。開發者也可以為現有的 PDF 文件加入書籤、頁碼、浮水印及其他功能。

iTextSharp 的主要功能包括：

• PDF 產生。
• PDF 操作（蓋浮水印、合併／分割 PDF）。
• PDF 表單填寫。
• XML 功能。
• 數位簽章。

- iText 5.5.8 fixes a problem with digital signatures that was accidentally introduced in version 5.5.7.
- we also improved the verification of OCSP responses.
- There were also problems when signing PDFs that are compliant with the PDF/A-2, PDF/A-3 and ZUGFeRD standard. Those are now fixed.
# Other improvements involve:
- Fonts: there were issues with some Noto fonts, we fixed the range of characters in the ToUnicode table, we provided a fallback mechanism in case of absent OS/2 tables,
- Annotations: fixed some scaling issues and some flattening problems when skew and rotation are involved,
- PdfReader: fixed partial reading when a PDF file is imported as a byte array,
- Tagged PDF: fixed a problem with the structure tree when using page events,
- Page labels: we received code contributions from Nick Park that improve page label extraction.