SignedCms.CheckHash Method

Definition

Namespace:

System.Security.Cryptography.Pkcs

Assembly:

System.Security.Cryptography.Pkcs.dll

The CheckHash() method verifies the data integrity of the CMS/PKCS #7 message. CheckHash() is a specialized method used in specific security infrastructure applications that only wish to check the hash of the CMS message, rather than perform a full digital signature verification. CheckHash() does not authenticate the author nor sender of the message because this method does not involve verifying a digital signature. For general-purpose checking of the integrity and authenticity of a CMS/PKCS #7 message, use the CheckSignature(Boolean) or CheckSignature(X509Certificate2Collection, Boolean) methods.

public:
 void CheckHash();

public void CheckHash ();

member this.CheckHash : unit -> unit

Public Sub CheckHash ()

Exceptions

InvalidOperationException

A method call was invalid for the object's current state.

Remarks

This method does not provide authentication of the CMS/PKCS #7 message.

See also

• CmsSigner
• CheckHash()
• SubjectIdentifierType