Defines how the certificate key can be used. If this value is not defined, the key can be used for any purpose.
Syntax
public enum X509KeyUsageFlags
Remarks
This class is an implementation of a commonly used extension that is mapped by default to the System.Security.Cryptography.CryptoConfig file. When the X509Certificate2.Extensions property of the System.Security.Cryptography.X509Certificates.X509Certificate2 class is invoked, this class can be used directly.
Members
| Member Name | Description |
|---|---|
| CrlSign |
The key can be used to sign a certificate revocation list (CRL). |
| DataEncipherment |
The key can be used for data encryption. |
| DecipherOnly |
The key can be used for decryption only. |
| DigitalSignature |
The key can be used as a digital signature. |
| EncipherOnly |
The key can be used for encryption only. |
| KeyAgreement |
The key can be used to determine key agreement, such as a key created using the Diffie-Hellman key agreement algorithm. |
| KeyCertSign |
The key can be used to sign certificates. |
| KeyEncipherment |
The key can be used for key encryption. |
| None |
No key usage parameters. |
| NonRepudiation |
The key can be used for authentication. |
Requirements
Assembly: System (in System.dll)
Assembly Versions: 2.0.0.0, 4.0.0.0
Since: .NET 2.0