Node crypto.createCipheriv() Method
The crypto.createCipheriv() method is an inbuilt application programming interface of the crypto module which is used to create a Cipher object, with the stated algorithm, key, and initialization vector (iv).
Syntax:
crypto.createCipheriv( algorithm, key, iv, options )
Parameters: This method accepts four parameters as mentioned above and described below:
- algorithm: It is a string-type value that dependent on OpenSSL. The examples are aes192, aes256, etc.
- key: It is the raw key that is used by the algorithm and iv.
- iv: It is an initialization vector that must be uncertain and very unique. However, an ideal iv will be cryptographically random. It don’t need to be secret.
- options: It is an optional parameter that is used to control stream behavior. It is optional except when a cipher is used in CCM or OCB mode(e.g. ‘aes-128-ccm’).
Return Value: It returns Cipher object.
Example 1: Below examples illustrate the use of crypto.createCipheriv() method in NodeJs:
Javascript
const crypto = require( 'crypto' );
const algorithm = 'aes-256-cbc' ;
const key = crypto.randomBytes(32);
const iv = crypto.randomBytes(16);
function encrypt(text) {
let cipher = crypto.createCipheriv(
'aes-256-cbc' , Buffer.from(key), iv);
let encrypted = cipher.update(text);
encrypted = Buffer.concat([encrypted, cipher.final()]);
return {
iv: iv.toString( 'hex' ),
encryptedData: encrypted.toString( 'hex' )
};
}
var output = encrypt( "GeeksforGeeks" );
console.log(output);
|
Output:
{ iv: 'fb1f4b0a7daaada6cae678df32fad0f0',
encryptedData: '41aad2618892aa3d1850d336ad15b50e' }
Example 2: Below examples illustrate the use of crypto.createCipheriv() method in NodeJs:
Javascript
const crypto = require( 'crypto' );
const algorithm = 'aes-192-cbc' ;
const password = 'bncaskdbvasbvlaslslasfhj' ;
const key = crypto.scryptSync(password, 'GfG' , 24);
const iv = Buffer.alloc(16, 0);
const cipher = crypto.createCipheriv(algorithm, key, iv);
let encrypted = '' ;
cipher.on( 'readable' , () => {
let chunk;
while ( null !== (chunk = cipher.read())) {
encrypted += chunk.toString( 'base64' );
}
});
cipher.on( 'end' , () => {
console.log(encrypted);
});
cipher.write( 'CS-Portal' );
cipher.end();
console.log( "done" );
|
Output:
done
MfHwhG/WPv+TIbG/qM78qA==
We have a Cheat Sheet on Nodejs crypto methods where we covered all the crypto methods to check those please go through Node Crypto Module Complete Reference this article.
Last Updated :
15 Jan, 2024
Like Article
Save Article
Share your thoughts in the comments
Please Login to comment...