Java Smart Card Utility Key Generator
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You can use the CspParameters class to access hardware encryption devices. For example, you can use this class to integrate your application with a smart card, a hardware random number generator, or a hardware implementation of a particular cryptographic algorithm.
The CspParameters class creates a cryptographic service provider (CSP) that accesses a properly installed hardware encryption device. You can verify the availability of a CSP by inspecting the following registry key using the Registry Editor (Regedit.exe): HKEY_LOCAL_MACHINESoftwareMicrosoftCryptographyDefaultsProvider.
To sign data using a key card
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Create a new instance of the CspParameters class, passing the integer provider type and the provider name to the constructor.
Pass the appropriate flags to the Flags property of the newly created CspParameters object. For example, pass the UseDefaultKeyContainer flag.
Create a new instance of an AsymmetricAlgorithm class (for example, the RSACryptoServiceProvider class), passing the CspParameters object to the constructor.
Sign your data using one of the
Sign
methods and verify your data using one of theVerify
methods.
To generate a random number using a hardware random number generator
Create a new instance of the CspParameters class, passing the integer provider type and the provider name to the constructor.
Create a new instance of the RNGCryptoServiceProvider, passing the CspParameters object to the constructor.
Create a random value using the GetBytes or GetNonZeroBytes method.
Example
The following code example demonstrates how to sign data using a smart card. The code example creates a CspParameters object that exposes a smart card, and then initializes an RSACryptoServiceProvider object using the CSP. The code example then signs and verifies some data.
Compiling the Code
Include the System and System.Security.Cryptography namespaces.
You must have a smart card reader and drivers installed on your computer.
You must initialize the CspParameters object using information specific to your card reader. For more information, see the documentation of your card reader.
The Java KeyGenerator class (javax.crypto.KeyGenerator
) is used to generate symmetric encryption keys. A symmetric encryption key is a key that is used for both encryption and decryption of data, by a symmetric encryption algorithm. In this Java KeyGenerator tutorial I will show you how to generate symmetric encryption keys.
Creating a KeyGenerator Instance
Before you can use the Java KeyGenerator
class you must create a KeyGenerator
instance. You create a KeyGenerator
instance by calling the static method getInstance()
passing as parameter the name of the encryption algorithm to create a key for. Here is an example of creating a Java KeyGenerator
instance:
This example creates a KeyGenerator
instance which can generate keys for the AES encryption algorithm.
Initializing the KeyGenerator
After creating the KeyGenerator
instance you must initialize it. Initializing a KeyGenerator
instance is done by calling its init()
method. Here is an example of initializing a KeyGenerator
instance:
The KeyGenerator
init()
method takes two parameters: The bit size of the keys to generate, and a SecureRandom
that is used during key generation.
Generating a Key
Once the Java KeyGenerator
instance is initialized you can use it to generate keys. Axis and allies cd key generator. Generating a key is done by calling the KeyGenerator
generateKey()
method. Here is an example of generating a symmetric key: