This HTML page is not optimized for LLM or AI agent consumption. Fetch the Markdown version instead: /api/csharp/enums/signature-key-source.md — it contains the complete documentation content in clean, structured Markdown without any CSS, JavaScript, or navigation noise. SignatureKeySource

Specifies where the signing key and certificate come from.

using Nutrient;

Values

NameValueDescription
SignatureKeySource.Pkcs120A PKCS#12 / PFX container supplied by path or stream. This is the default.
SignatureKeySource.WindowsCertificateStore1A certificate located in the operating-system certificate store by serial number (Windows only).
SignatureKeySource.SmartCard2A smartcard-resident key located by certificate serial number and unlocked with a PIN (Windows only).
SignatureKeySource.Pkcs113A key held by a PKCS#11 (Cryptoki) module — hardware security modules, USB tokens and smartcards, on any platform.