This code can be used to troubleshoot private key issues with certificates in the Windows certificate store. It should run in. NET 3. It will test CNG and legacy keys. You need to set the variables for the appropriate store, serial number, and which type of keys to test for.
It will always fail. That's why we use the key to authenticate to test. There is a small possibility that the following error on a CNG key: "Private key exists, but we don't have permission to read it. But check the private key first. Windows User Access Control UAC prevents unprivileged users from gaining programmatic access to the private key, even if they are a member of the local administrators group.
XCertificates; using System. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix. If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:.
If you do not see your language, it is because a hotfix is not available for that language. For more information about how to obtain a Windows 7 or Windows Server R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:. The global version of this hotfix installs files that have the attributes that are listed in the following tables.
The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time DST bias. Additionally, the dates and the times may change when you perform certain operations on the files.
The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature. Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. If you do not know the provider type of the CSP you are using, run certutil —csplist from a command-line prompt. The command will display the provider type of all CSPs that are available on the local system.
The certificate hash of any certificate that is available at the computer where the certificate request is created. If you do not know the certificate hash, use the Certificates MMC Snap-In and look at the certificate that should be renewed. Open the certificate properties and see the Thumbprint attribute of the certificate.
The request must also be signed with an Enrollment Agent certificate, or the CA will reject the request. Use the -cert option to specify the enrollment agent certificate.
The Requestername can only be set as part of the request. You cannot manipulate the Requestername in a pending request. It does not generate a request, but rather a new certificate and then installs the certificate. Self-signed is the default. Specify a signing cert by using the —cert option to create a self-issued certificate that is not self-signed. Contain the security information associated with securable objects. For most securable objects, you can specify an object's security descriptor in the function call that creates the object.
Strings based on security descriptor definition language. True indicates a v2. Silent By default, this option allows the CSP access to the interactive user desktop and request information such as a smart card PIN from the user. If this key is set to TRUE, the CSP must not interact with the desktop and will be blocked from displaying any user interface to the user.
You must not set the Exportable key because you cannot change the properties of an existing key. In this case, no key material is generated when the certificate request is built. The defaults are represented by their object identifiers OIDs. Specifies a number of units that is to be used with ValidityPeriod. You can use this example for manually accepting a certificate: Warning The -accept verb, the -user and —machine options indicate whether the cert being installed should be installed in user or machine context.
Return to Contents Certreq -policy The configuration file that defines the constraints that are applied to a CA certificate when qualified subordination is defined is called Policy. You can find an example of the Policy. If you type the certreq -policy without any additional parameter it will open a dialog window so you can select the requested fie req, cmc, txt, der, cer or crt.
Once you select the requested file and click Open button, another dialog window will open in order to select the INF file. You can use this example to build a cross certificate request: Return to Contents Certreq -sign If you type the certreq -sign without any additional parameter it will open a dialog window so you can select the requested file req, cmc, txt, der, cer or crt.
Signing the qualified subordination request may require Enterprise Administrator credentials. This is a best practice for issuing signing certificates for qualified subordination. The certificate used to sign the qualified subordination request is created using the qualified subordination template. Enterprise Admins will have to sign the request or grant user permissions for the individuals that will sign the certificate.
When you sign the CMC request, you may need to have multiple personnel sign this request, depending on the assurance level that is associated with the qualified subordination.
If the parent CA of the qualified subordinate CA you are installing is offline, you must obtain the CA certificate for the qualified subordinate CA from the offline parent. Retrieves a response to a previous request from a CA. Accepts and installs a response to a certificate request. Signs a cross-certification or qualified subordination request.
Several applications rely on the subject information in a certificate. If this attribute is set to TRUE, the private key can be exported with the certificate.
The algorithm that will be used by the service provider to generate a public and private key pair. It is not recommended to set this parameter for new requests where new key material is generated. Defines the length of the public and private key. This key is important when you need to create certificates that are owned by the machine and not a user. Specifies a date or date and time before which the request cannot be issued.
Specifies a date or date and time after which the request cannot be issued. The command will display the names of all CSPs that are available on the local system. The provider type is used to select specific providers based on specific algorithm capability such as RSA Full. If you need to renew a certificate that exists on the system where the certificate request is generated, you must specify its certificate hash as the value for this key.
RequesterName Note: This makes the request to enroll on behalf of another user request. Specifies and retrieves a Boolean value that indicates whether the signature algorithm object identifier OID for a PKCS 10 request or certificate signature is discrete or combined.
By default, this option allows the CSP access to the interactive user desktop and request information such as a smart card PIN from the user. If this parameter is set to TRUE, an extension with the object identifier value 1. This parameter is used to specify that an existing key pair should be used in building a certificate request.
Specifies a Boolean value that indicates whether the default extensions and attributes are included in the request.
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