Is there any way to programmatically edit the purposes enabled for a give x.509 certificate?
This functionality is available via the certificates mmc snap-in (hyperlink below) but I need to perform the action through code. preferably C#.
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Is there any way to programmatically edit the purposes enabled for a give x.509 certificate?
This functionality is available via the certificates mmc snap-in (hyperlink below) but I need to perform the action through code. preferably C#.
The MMC can do whatever the Crypto API can do and there are a bunch of Certificate related functions like CertAddEnhancedKeyUsageIdentifier or CertSetCertificateContextProperty. There is a full blown example at Example C Program: Getting and Setting Certificate Properties, including a modification of the ‘enhanced key usage’ that specifies the uses for which a certificate is valid. For instance, to make a cert valid for SSL from the server side you’d have to add the EKU OID
1.3.6.1.5.5.7.3.1(aka. ‘Server Authentication’), see Configuring Certificate for Use by SSL.The C# equivalent is the X509KeyUsageExtension class. See the link to the class spec for examples.