Powershell Generate Certificate With Private Key

Posted on 10.08.2020by admin

Oct 29, 2017 My followers know what’s coming next: I don’t care much of 3rd party tools and yes, of course, I am going to use only Windows PowerShell. First of all we need a certificate. This certificate will include a private key and public key. With the private key we can decrypt data. With the public key we can encrypt data. A self-signed certificate is a certificate you sign with your own private key. In contrast, an external public internet certificate authority (CA) signs a public certificate. You can also have your own private CA in which you can issue a private certificate. Digital certificates is generated using SelfCert.exe, but export the private key is not available or grayed out. I would like to know on how to generate a digital certificates with exportable private key using PowerShell. In PowerShell, you can only obtain the public portion of this private key via: (Get-AzureKeyVaultKey -VaultName $vaultName -Name $certificateName).Key The AKV-secret provides a way to export the full X.509 certificate, including its private key (if its policy allows for private key exporting). If you want to open Certificate Manager in current user scope using PowerShell, you type certmgr in the console window. In the Wizard, click Next. Select No, do not export the private key, and then click Next. On the Export File Format page, select Base-64 encoded X.509 (.CER)., and then click Next. The Export-PfxCertificate cmdlet exports a certificate or a PFXData object to a Personal Information Exchange (PFX) file. By default, extended properties and the entire chain are exported. Delegation may be required when using this cmdlet with Windows PowerShell® remoting and changing user configuration.

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A HealthVault application uses a private key to encrypt the first handshake message that it sends to the platform service. HealthVault then uses a public key to verify the sender. The public key must be registered with HealthVault through the Application Configuration Center. The private key is securely stored by the application and is never shared with HealthVault.

Best practices

Theft of the private key will allow an unauthorized agent to impersonate your application and make calls to HealthVault.

Store it somewhere safe.
Do not include it in any e-mail messages.
Limit access to the key to only those people who must have access.

Creating the key pair

Windows includes a couple of ways to generate a HealthVault compatible X509 certificate.

If you lose the certificate in the future, or if you generated your private key in a different way, you can export a DER-encoded public certificate using the Microsoft Management Console. The corresponding private key is wrapped in a certificate that has been installed in your LocalMachineMy store.

To create the private/public key pair:

In Windows 10/Server 2016
1. Open PowerShell as an Administrator
2. Paste the following content into PowerShell, replacing “Insert your ApplicationID here” with the ApplicationID you received from HealthVault’s Application Configuration Center.
On previous versions of Windows
1. Open a Visual Studio Developer Command Prompt as an Administrator.
2. Execute the following command, replacing this GUID with your own application ID:
These commands will install the private key on your machine and write the public key to the specified certificate file. You will find the signed certificate in the Downloads folder for the currently logged in user.