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Node.js Crypto Module

❮ Built-in Modules


Example

Encrypt the text 'abc'

var crypto = require('crypto');

var mykey = crypto.createCipher('aes-128-cbc', 'mypassword');
var mystr = mykey.update('abc', 'utf8', 'hex')
mystr += mykey.final('hex');

console.log(mystr); //34feb914c099df25794bf9ccb85bea72
Run example »

Example

Decrypt back to 'abc'

var crypto = require('crypto');

var mykey = crypto.createDecipher('aes-128-cbc', 'mypassword');
var mystr = mykey.update('34feb914c099df25794bf9ccb85bea72', 'hex', 'utf8')
mystr += mykey.final('utf8');

console.log(mystr); //abc
Run example »

Definition and Usage

The crypto module provides a way of handling encrypted data.


Syntax

The syntax for including the crypto module in your application:

var crypto = require('crypto');

Crypto Properties and Methods

Method Description
constants Returns an object containing Crypto Constants
fips Checks if a FIPS crypto provider is in use
createCipher() Creates a Cipher object using the specific algorithm and password
createCipheriv() Creates a Cipher object using the specific algorithm, password and initialization vector
createDecipher() Creates a Decipher object using the specific algorithm and password
createDecipheriv() Creates a Decipher object using the specific algorithm, password and initialization vector
createDiffieHellman() Creates a DiffieHellman key exchange object
createECDH() Creates an Elliptic Curve Diffie Hellmann key exchange object
createHash() Creates a Hash object using the specified algorithm
createHmac() Creates a Hmac object using the specified algorithm and key
createSign() Creates a Sign object using the specified algorithm and key
createVerify() Creates a Verify object using the specified algorithm
getCiphers Returns an array of supported cipher algorithms
getCurves() Returns an array of supported elliptic curves
getDiffieHellman() Returns a predefined Diffie Hellman key exchange object
getHashes() Returns an array of supported hash algorithms
pbkdf2() Creates a Password Based Key Derivation Function 2 implementation
pbkdf2Sync() Creates a synchronous Password Based Key Derivation Function 2 implementation
privateDecrypt() Decrypts data using a private key
timingSafeEqual() Compare two Buffers and returns true is they are equal, otherwise false
privateEncrypt() Encrypts data using a private key
publicDecrypt() Decrypts data using a public key
publicEncrypt() Encrypts data using a public key
randomBytes() Creates random data
setEngine() Sets the engine for some or all OpenSSL function

❮ Built-in Modules