Api Key Generation Algorithm Java

  • Java Cryptography Tutorial
  • Message Digest and MAC
  • Keys and Key Store

Take into consideration that during authentication you can put into the JWT token all the requester's information you may need in subsequent calls. This will save you from making any further trips to the database or to the authorization server.

Feb 02, 2013 Java Code for RSA Key Generation. Java Code for RSA Key Generation. How the RSA algorithm works, including how to select d, e, n, p, q. REST API concepts and examples - Duration. This package also supports the generation and storage of cryptographic public key pairs, as well as a number of exportable cryptographic operations including those for message digest and signature generation. Finally, this package provides classes that support signed/guarded objects and secure random number generation. Apr 10, 2020  To get an API key: Go to the Google Cloud Platform Console. Click the project drop-down and select or create the project for which you want to add an API key. Click the menu button and select APIs & Services Credentials. On the Credentials page, click Create credentials API key. The API key created dialog displays your newly created API key. Oct 29, 2019  The first algorithm that we’ll create will take a JSON formatted object passed as input by the user which is deserialized into a Java object before the algorithm is called. It will output a JSON formatted object which the user will consume with an API call to the algorithm path which is found at the bottom of the algorithm description page.

  • Generating Keys
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You can encrypt given data using the Cipher class of the javax.crypto package. Follow the steps given below to encrypt given data using Java.

Step 1: Create a KeyPairGenerator object

The KeyPairGenerator class provides getInstance() method which accepts a String variable representing the required key-generating algorithm and returns a KeyPairGenerator object that generates keys.

Create KeyPairGenerator object using the getInstance() method as shown below.

Step 2: Initialize the KeyPairGenerator object

The KeyPairGenerator class provides a method named initialize() this method is used to initialize the key pair generator. This method accepts an integer value representing the key size.

Initialize the KeyPairGenerator object created in the previous step using the initialize() method as shown below.

Step 3: Generate the KeyPairGenerator

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You can generate the KeyPair using the generateKeyPair() method of the KeyPairGenerator class. Generate the key pair using this method as shown below.

Step 4: Get the public key

You can get the public key from the generated KeyPair object using the getPublic() method as shown below.

Windows xp activation key generator. Get the public key using this method as shown below.

Step 5: Create a Cipher object

The getInstance() method of Cipher class accepts a String variable representing the required transformation and returns a Cipher object that implements the given transformation.

Api Key Generation Algorithm Java Pdf

Create the Cipher object using the getInstance() method as shown below.

Step 6: Initialize the Cipher object

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The init() method of the Cipher class accepts two parameters an integer parameter representing the operation mode (encrypt/decrypt) and, a Key object representing the public key.

Initialize the Cypher object using the init() method as shown below.

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Step 7: Add data to the Cipher object

The update() method of the Cipher class accepts a byte array representing the data to be encrypted and updates the current object with the data given.

Update the initialized Cipher object by passing the data to the update() method in the form of byte array as shown below.

Step 8: Encrypt the data

The doFinal() method of the Cipher class completes the encryption operation. Therefore, finish the encryption using this method as shown below.

Example

Following Java program accepts text from user, encrypts it using RSA algorithm and, prints the encrypted format of the given text.

Output

The above program generates the following output −