Demonstrates how to apply a digital signature to specialized ODT and OTT documents while preserving file structure with GroupDocs.Signature.

README.md

Add Digital Signatures to ODT and OTT Files using GroupDocs.Signature for .NET

This gist shows how to add a digital signature to OpenDocument Text (ODT) and OpenDocument Template (OTT) files while keeping their internal structure intact using the GroupDocs.Signature .NET library.

📦 Prerequisites

• .NET environment (e.g., .NET 6.0 or later)
• GroupDocs.Signature for .NET package – install via NuGet (Install-Package GroupDocs.Signature)
• A digital certificate file (.pfx) and optional image for visual representation
• Temporary license key (obtain from GroupDocs temporary license)

💡 Key Capabilities

• Apply digital signatures to ODT and OTT documents
• Preserve original document structure and formatting
• Specify signature appearance and position
• Secure signing with password‑protected certificates

💻 Code Example

See the following examples:

• SignOdtFile.cs – adds a digital signature to an ODT document.
• SignOttFile.cs – adds a digital signature to an OTT document.

Teaser snippet

using (Signature signature = new Signature("sample.odt"))
{
    DigitalSignOptions options = new DigitalSignOptions("certificate.pfx")
    {
        ImageFilePath = "sample.jpg",
        Left = 100,
        Top = 100,
        Password = "1234567890"
    };
    signature.Sign("sampleSigned.pdf", options);
}

🛠️ How to Use

1. Add the GroupDocs.Signature NuGet package to your project.
2. Place your source ODT/OTT file, certificate (.pfx), and optional image in the project folder.
3. Update the file paths, certificate password, and signature coordinates in the code files.
4. Run the example – a signed PDF (sampleSigned.pdf) will be generated.

📚 Conclusion

These snippets provide a quick start for digitally signing ODT and OTT documents with GroupDocs.Signature for .NET. For more detailed information, refer to the official documentation: https://docs.groupdocs.com/signature/net/.

SignOdtFile.cs

using (Signature signature = new Signature("sample.otd"))
{
    // initialize digital option with certificate file path
    DigitalSignOptions options = new DigitalSignOptions("certificate.pfx")
    {
        // optional: setup image file path
        ImageFilePath = "sample.jpg",

        // set signature position
        Left = 100,
        Top = 100,

        // set certificate password
        Password = "1234567890"
    };
    signature.Sign("sampleSigned.pdf", options);
}

SignOttFile.cs

using (Signature signature = new Signature("sample.ott"))
{
    // initialize digital option with certificate file path
    DigitalSignOptions options = new DigitalSignOptions("certificate.pfx")
    {
        // optional: setup image file path
        ImageFilePath = "sample.jpg",

        // set signature position
        Left = 100,
        Top = 100,

        // set certificate password
        Password = "1234567890"
    };
    signature.Sign("sampleSigned.pdf", options);
}