The SignedCms object that represents a CMS/PKCS #7 message.class represents a signer associated with a
Assembly: System.Security (in System.Security.dll)
The Certificate property retrieves the signing certificate associated with the signer information.
The CounterSignerInfos property retrieves the set of counter signers associated with the signer information.
The SignerIdentifier property retrieves the certificate identifier of the signer associated with the signer information.
The Version property retrieves the signer information version.
The CheckHash method verifies the data integrity of the CMS/PKCS #7 message signer information. CheckHash is a specialized method used in specific security infrastructure applications in which the subject uses the HashOnly member of the SubjectIdentifierType enumeration when setting up a CmsSigner object. CheckHash does not authenticate the signer information because this method does not involve verifying a digital signature. For general-purpose checking of the integrity and authenticity of CMS/PKCS #7 message signer information and countersignatures, use the CheckSignature(Boolean) or CheckSignature(X509Certificate2Collection, Boolean) methods.
The CheckSignature(Boolean) method verifies the digital signature of the message and, optionally, validates the certificate.
The CheckSignature(X509Certificate2Collection, Boolean) method verifies the digital signature of the message by using the specified collection of certificates and, optionally, validates the certificate.
The ComputeCounterSignature() method prompts the user to select a signing certificate, creates a countersignature, and adds the signature to the CMS/PKCS #7 message. Countersignatures are restricted to one level.
The ComputeCounterSignature(CmsSigner) method creates a countersignature by using the specified signer and adds the signature to the CMS/PKCS #7 message. Countersignatures are restricted to one level.
Determines whether the specified object is equal to the current object.(Inherited from Object.)
Serves as the default hash function. (Inherited from Object.)
The RemoveCounterSignature method removes the countersignature for the specified object.
Returns a string that represents the current object.(Inherited from Object.)
The signatures represented by theclass can be either over message content or a signature. The latter kind of signature is referred to as a countersignature.
This implementation of CMS/PKCS #7 supports only one level of countersignature. That is, a signature can be signed, which forms a countersignature, but that countersignature cannot be signed again.
This class does not have a public constructor; therefore, it cannot be publicly instantiated. It is a read-only class accessible from the SignedCms.SignerInfos property.
Available since 2.0
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.