Node.js cipher.final() Method
The cipher.final() method is an inbuilt application programming interface of class Cipher within crypto module which is used to return the buffer containing the value of cipher object.
Syntax:
const cipher.final([outputEncoding])
Parameters: This method takes the output encoding as a parameter.
Return Value: This method returns the object of buffer containing the cipher value.
Example 1: Filename: index.js
Javascript
// Node.js program to demonstrate the // cipher.final() method // Importing crypto module const crypto = require( 'crypto' ); // Creating and initializing algorithm and password const algorithm = 'aes-192-cbc' ; const password = 'Password used to generate key' ; // Getting key for the cipher object const key = crypto.scryptSync(password, 'salt' , 24); // Creating and initializing the static iv const iv = Buffer.alloc(16, 0); // Creating and initializing the cipher object const cipher = crypto.createCipheriv(algorithm, key, iv); // Getting buffer value // by using final() method let value = cipher.final( 'hex' ); // Display the result console.log( "buffer :- " + value); |
Output:
buffer :- b9be42878310d599e4e49e040d1badb9
Example 2: Filename: index.js
Javascript
// Node.js program to demonstrate the // cipher.final() method // Importing crypto module const crypto = require( 'crypto' ); // Creating and initializing algorithm and password const algorithm = 'aes-192-cbc' ; const password = 'Password used to generate key' ; // Getting key for cipher object crypto.scrypt(password, 'salt' , 24, { N: 512 }, (err, key) => { if (err) throw err; // Creating and initializing the static iv const iv = Buffer.alloc(16, 0); // Creating and initializing the cipher object const cipher = crypto .createCipheriv(algorithm, key, iv); // Getting buffer value // by using final() method let value = cipher.final( 'hex' ); // Display the result console.log( "buffer :- " + value); }); |
Output:
buffer :- 726cccfc7d80ca473d8d4de1a0a42675
Run the index.js file using the following command:
node index.js
Reference: https://nodejs.org/dist/latest-v12.x/docs/api/crypto.html#crypto_cipher_final_outputencoding
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