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CmsSigner Class

The CmsSigner class provides signing functionality.

System.Object
  System.Security.Cryptography.Pkcs.CmsSigner

Namespace:  System.Security.Cryptography.Pkcs
Assembly:  System.Security (in System.Security.dll)
[HostProtectionAttribute(SecurityAction.LinkDemand, MayLeakOnAbort = true)]
public sealed class CmsSigner

The CmsSigner type exposes the following members.

  NameDescription
Public methodCmsSigner()The CmsSigner() constructor creates an instance of the CmsSigner class by using a default subject identifier type.
Public methodCmsSigner(CspParameters)The CmsSigner(CspParameters) constructor creates an instance of the CmsSigner class with the specified cryptographic service provider (CSP) parameters. CmsSigner(CspParameters) is useful when you know the specific CSP and private key to use for signing.
Public methodCmsSigner(SubjectIdentifierType)The CmsSigner(SubjectIdentifierType) constructor creates an instance of the CmsSigner class with the specified subject identifier type.
Public methodCmsSigner(X509Certificate2)The CmsSigner constructor creates an instance of the CmsSigner class with the specified signing certificate.
Public methodCmsSigner(SubjectIdentifierType, X509Certificate2)The CmsSigner constructor creates an instance of the CmsSigner class with the specified signer identifier type and signing certificate.
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  NameDescription
Public propertyCertificateThe Certificate property sets or retrieves the X509Certificate2 object that represents the signing certificate.
Public propertyCertificatesThe Certificates property retrieves the X509Certificate2Collection collection that contains certificates associated with the message to be signed.
Public propertyDigestAlgorithmThe DigestAlgorithm property sets or retrieves the Oid that represents the hash algorithm used with the signature.
Public propertyIncludeOptionThe IncludeOption property sets or retrieves the option that controls whether the root and entire chain associated with the signing certificate are included with the created CMS/PKCS #7 message.
Public propertySignedAttributesThe SignedAttributes property retrieves the CryptographicAttributeObjectCollection collection of signed attributes to be associated with the resulting SignerInfo content. Signed attributes are signed along with the specified content.
Public propertySignerIdentifierTypeThe SignerIdentifierType property sets or retrieves the type of the identifier of the signer.
Public propertyUnsignedAttributesThe UnsignedAttributes property retrieves the CryptographicAttributeObjectCollection collection of unsigned PKCS #9 attributes to be associated with the resulting SignerInfo content. Unsigned attributes can be modified without invalidating the signature.
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  NameDescription
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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NoteNote

The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: MayLeakOnAbort. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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