This documentation is archived and is not being maintained.

SignedCms Class

The SignedCms class enables signing and verifying of CMS/PKCS #7 messages.

Namespace:  System.Security.Cryptography.Pkcs
Assembly:  System.Security (in System.Security.dll)

public sealed class SignedCms

The Cryptographic Message Syntax RFC specifies the following MIME types and file name extensions for CMS/PKCS #7 messages with these content types.

Content type

MIME type

Extension

envelopedData

application/pkcs7-mime

.p7m

signedData

application/pkcs7-signature

.p7s.p7c

System.Object
  System.Security.Cryptography.Pkcs.SignedCms

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0
Show: