Windows Command Line Generate Random Key

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How to: Create a public-private key pair.; 2 minutes to read; In this article. To sign an assembly with a strong name, you must have a public/private key pair. This public and private cryptographic key pair is used during compilation to create a strong-named assembly. Create a key pair. To create a key pair, at a command prompt. RANDOM Results in a random setting for the administrator key for a card that is not returned to the user. This creates a card that might not be manageable by using smart card management tools. When generated with RANDOM, the administrator key must be. We cannot generate product key through command prompt but can remove, add and activate it. Using the command: Open Command prompt. Press Windows key on the keyboard and type cmd. Right-click on cmd from the programs list and select Run as administrator. Type the following command: slmgr -upk slmgr -ipk key slmgr -ato; 4. While Encrypting a File with a Password from the Command Line using OpenSSL is very useful in its own right, the real power of the OpenSSL library is its ability to support the use of public key cryptograph for encrypting or validating data in an unattended manner (where the password is not required to encrypt) is done with public keys. The Commands to Run Generate a 2048 bit RSA.

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Applies To: Windows 10, Windows Server 2016

The Tpmvscmgr command-line tool allows users with Administrative credentials to create and delete TPM virtual smart cards on a computer. For examples of how this command can be used, see Examples.

Syntax

Tpmvscmgr create [/quiet] /name <name> /AdminKey {DEFAULT PROMPT RANDOM} [/PIN {DEFAULT PROMPT}] [/PUK {DEFAULT PROMPT}] [/generate] [/machine <machine name>] [/pinpolicy [policy options]] [/attestation {AIK_AND_CERT AIK_ONLY}] [/?]

Tpmvscmgr destroy [/quiet] [/instance <device instance ID>] [/machine <machine name>] [/?]

Parameters for Create command

The Create command sets up new virtual smart cards on the user’s system. It returns the instance ID of the newly created card for later reference if deletion is required. The instance ID is in the format ROOTSMARTCARDREADER000n where n starts from 0 and is increased by 1 each time you create a new virtual smart card.

ParameterDescription
/nameRequired. Indicates the name of the new virtual smart card.
/AdminKeyIndicates the desired administrator key that can be used to reset the PIN of the card if the user forgets the PIN.
DEFAULT Specifies the default value of 010203040506070801020304050607080102030405060708.
PROMPT Prompts the user to enter a value for the administrator key.
RANDOM Results in a random setting for the administrator key for a card that is not returned to the user. This creates a card that might not be manageable by using smart card management tools. When generated with RANDOM, the administrator key must be entered as 48 hexadecimal characters.
/PINIndicates desired user PIN value.
DEFAULT Specifies the default PIN of 12345678.
PROMPT Prompts the user to enter a PIN at the command line. The PIN must be a minimum of eight characters, and it can contain numerals, characters, and special characters.
/PUKIndicates the desired PIN Unlock Key (PUK) value. The PUK value must be a minimum of eight characters, and it can contain numerals, characters, and special characters. If the parameter is omitted, the card is created without a PUK.
DEFAULT Specifies the default PUK of 12345678.
PROMPT Prompts the user to enter a PUK at the command line.
/generateGenerates the files in storage that are necessary for the virtual smart card to function. If the /generate parameter is omitted, it is equivalent to creating a card without this file system. A card without a file system can be managed only by a smart card management system such as Microsoft Endpoint Configuration Manager.
/machineAllows you to specify the name of a remote computer on which the virtual smart card can be created. This can be used in a domain environment only, and it relies on DCOM. For the command to succeed in creating a virtual smart card on a different computer, the user running this command must be a member in the local administrators group on the remote computer.
/pinpolicyIf /pin prompt is used, /pinpolicy allows you to specify the following PIN policy options:
minlen <minimum PIN length>
If not specified, defaults to 8. The lower bound is 4.
maxlen <maximum PIN length>
If not specified, defaults to 127. The upper bound is 127.
uppercase Can be ALLOWED, DISALLOWED, or REQUIRED. Default is ALLOWED.
lowercase Can be ALLOWED, DISALLOWED, or REQUIRED. Default is ALLOWED.
digits Can be ALLOWED, DISALLOWED, or REQUIRED. Default is ALLOWED.
specialchars Can be ALLOWED, DISALLOWED, or REQUIRED. Default is ALLOWED.
When using /pinpolicy, PIN characters must be printable ASCII characters.
/attestationConfigures attestation (subject only). This attestation uses an Attestation Identity Key (AIK) certificate as a trust anchor to vouch that the virtual smart card keys and certificates are truly hardware bound. The attestation methods are:
AIK_AND_CERT Creates an AIK and obtains an AIK certificate from the Microsoft cloud certification authority (CA). This requires the device to have a TPM with an EK certificate. If this option is specified and there is no network connectivity, it is possible that creation of the virtual smart card will fail.
AIK_ONLY Creates an AIK but does not obtain an AIK certificate.
/?Displays Help for this command.

Parameters for Destroy command

The Destroy command securely deletes a virtual smart card from a computer.

Warning

When a virtual smart card is deleted, it cannot be recovered.

ParameterDescription
/instanceSpecifies the instance ID of the virtual smart card to be removed. The instanceID was generated as output by Tpmvscmgr.exe when the card was created. The /instance parameter is a required field for the Destroy command.
/machineAllows you to specify the name of a remote computer on which the virtual smart card will be deleted. This can be used in a domain environment only, and it relies on DCOM. For the command to succeed in deleting a virtual smart card on a different computer, the user running this command must be a member in the local administrators group on the remote computer.
/?Displays Help for this command.

Remarks

Membership in the Administrators group (or equivalent) on the target computer is the minimum required to run all the parameters of this command.

For alphanumeric inputs, the full 127 character ASCII set is allowed.

Examples

The following command shows how to create a virtual smart card that can be later managed by a smart card management tool launched from another computer.

Alternatively, instead of using a default administrator key, you can create an administrator key at the command line. The following command shows how to create an administrator key.

The following command will create the unmanaged virtual smart card that can be used to enroll certificates.

The preceding command will create a virtual smart card with a randomized administrator key. The key is automatically discarded after the card is created. This means that if the user forgets the PIN or wants to the change the PIN, the user needs to delete the card and create it again. To delete the card, the user can run the following command.

Uncharted 4 keygen generator. 2.

where <instance ID> is the value printed on the screen when the user created the card. Specifically, for the first card created, the instance ID is ROOTSMARTCARDREADER0000.

The following command will create a TPM virtual smart card with the default value for the administrator key and a specified PIN policy and attestation method:

Next a prompt to enter password shows 'Enter passphrase (empty for no passphrase):'. Gitlab create ssh key. Creating SSH KeyStep 1 − To create SSH key, open the command prompt and enter the command as shown below −C:−ssh-keygenIt will prompt for 'Enter file in which to save the key (//.ssh/idrsa):', just type file name and press enter.

Additional references

OpenSSL is great library and tool set used in security related work. While talking security we can not deny that passwords and random numbers are important subjects. In this tutorial we will learn how to generate random numbers and passwords with OpenSSL.

Random Windows 10 Product Key

Base64 is an encoding format used in applications and different systems which can be transferred and used without problem. Base64 do not provides control characters. We can generate Base64 compatible random numbers with openssl rand . Here we set the character count 10 which is the last parameter.

Hexadecimal is a numbering system based 16 . We can generate Hexadecimal numbers with -hex option. In this example we will generate 20 character random hexadecimal numbers.

Powershell Generate Random Key

The default behaivour of rand is writing generated random numbers to the terminal. If we need a lot of numbers like 256 the terminal will be messed up. We have options to write the generated random numbers. We will use -out option and the file name. In this example we will write a file named myrand.txt

Security experts divide random number generator into two category.

  • Truly Random Number Generator (TRNG) where generated umbers are truly random and generally special hardware used.
  • Psedeu Random Number Generator (PRNG) where generated numbers are not truly random but near to the random. This types do not requires special hardware and operating systems like Linux,Windows and OpenSSL uses by default this type.

Windows Command Line Generate Random Key Generator

If we have special cryptographic hardware or TRNG engine we can use it with OpenSSL to make random numbers TRNG . We will use -engine option and the device path . If our device is locate at /dev/crypt0 we can use following command