Generate A Key And A Certificate Smart Card

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  1. Generate A Key And A Certificate Smart Card Payment
  2. Generate A Key And A Certificate Smart Card Balance
  3. Generate A Key And A Certificate Smart Card Number
  4. Smart Card Certificate Windows 10
  5. View Smart Card Certificates Windows
  6. Generate A Key And A Certificate Smart Card Login

Dec 19, 2017  Install the smart card’s management tools on the computer. Configure the CA to issue logon certificates for users. To do this you need to: Register the Smart Card logon templates and enrollment agent. Register the enrollment agent. Create logon certificates for users. Create lock workstation policies in smart card removal.

First, a few useful facts

  • The Nitrokey Pro, Crypto Stick and similar OpenPGP-Card hardware comes with three key slots for signing - encryption and authentication - with public/private key pair and optional certificate each.
  • A public RSA key can be derived from the private key. When writing a private key to a smart card, the corresponding public key will be available automatically.
  • On-card key generation with Nitrokey Pro takes approx. 4 minutes for RSA/4096 and 30 seconds for RSA/2048.
  • RSA public/private key pairs are interchangeable between SSH, GnuPG and X.509. This also means, that the same key pair can be used for all three methods.

Change key size

The card is programmed for a specific key size for each slot. This can be changed easily:

Generate a key and a certificate smart card online

The certificate must have a valid user principal name (UPN). The certificate must have the digital signature key usage. The certificate must have the smart card logon EKU. Any certificate that meets these requirements is displayed to the user with the certificate's UPN (or e-mail address or subject. The key management certificate is used to decrypt messages and emails sent to the card holder by other users. The card authentication certificate is different: using it does not require any PIN codes. This certificate is used to identify the card by its serial number, rather than the user. If you are enrolling on behalf of another user, select Request a Certificate for a smart card on behalf of another user using the Smart CardEnrollment Station, and then click. In large deployments, the administrator may wish to generate key pairs on smart cards prior to deploying them to users.

If you want to use GnuPG and generate all keys on card without backup, just continue the process without interrupting.

Generate A Key And A Certificate Smart Card Payment

Note: The 'Make off-card backup of encryption key' option creates a backup file for the first key only, not the other two keys.

Backup needed?

You have two options:

Generate A Key And A Certificate Smart Card Balance

  • Option 1: Key backup may come in handy, e.g. for email encryption, otherwise encrypted emails will be lost if the hardware token is unavailable/broken/lost. Keys should be generated off-card and copied onto the card later. Key material should be kept offline and stored securely on encrypted storage.
  • Option 2: No backup is needed, e.g. for SSH, VPN or Website-Login. If the hardware token happend to be unavailable, you can always regenerate a new key and reconfigure your servers. In this case, keys may be generated on-card.
  • Option 3: You may not trust the entropy gathering process when generating keys on-card. Please generate keys off-card in a secure environment and copy them onto the card later.

Move GPG key to card

The keytocard command will move a secret key to the smart card.

Note: It is a good idea to create a backup before proceeding and keep it in a safe place, e.g. offline and encrypted.

In order to copy the private key onto the card instead of moving it, have a look at addcardkey.

Note: The public GPG key including all meta data - e.g. name, email address, photo, .. - still resides in your keychain. In order to be able to restore your keychain or use the key on another computer, it is a good idea to export and upload the public key, then store the URL on the card:

Restore a GPG key/keychain

Generate

Generate key off-card and copy to card

First, let's generate a new RSA public/private key pair:

Note: It is perfectly fine to skip the previous step and use an existing private key from an X509 certificate or an SSH private key file, depending on your use case. Rsa 2048 generate public private key.

Now, copy the private key to a card:

Generate some keys on card

It is possible to let the smart card generate a public/private key pair on a specific slot (01.03). This is most useful for generating the authentication key (id 03) on card, while the other keys (01 and 02) may have been generated off-card in order to create a backup.

Note: The generated key pair can not (easily) be used for GnuPG, because a suitable import mechanism for the GnuPG keychain is not available at the moment. (Although, this would be a nice feature for the micro-ca-tool.)

Create CSR with card and store certificate on card

tbd.

Generate A Key And A Certificate Smart Card Number

Troubleshooting

Smart Card Certificate Windows 10

OSX: Card is unavailable/not working/busy/..

It is very likely, that scdaemon is blocking card access. It is safe to try

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View Smart Card Certificates Windows

Generate A Key And A Certificate Smart Card Login

The daemon will be restarted automatically by gpg-agent on demand.