Note that this code does NOT use the Javascript BigInt type, which is not constant time, and hence deprecated for use in cryptography.

Installation and Testing

Suppose you want to implement ECDH with NIST256 elliptic curve. First you need to initialize the context:

var ctx = new CTX("NIST256");

then you can call the functions as follows:

ctx.ECDH.KEY_PAIR_GENERATE(...);
ctx.ECDH.ECPSVDP_DH(...);

If you need to use more than one elliptic curve in the same program you only need to initialize two different contexts, for example

var ctx1 = new CTX("NIST256");
var ctx2 = new CTX("C25519");

The following is the list of all elliptic curves supported by MIRACL Core JS

['ED25519', 'C25519', 'C41417', 'GOLDILOCKS', 'X448', 'NIST256', 'SECP160R1', 'C1174', 'C1665', 'MDC', 'NIST384','NIST521', 'BRAINPOOL', 'ANSSI', 'HIFIVE', 'JUBJUB', 'NUMS256W', 'SECP256K1','NUMS256E', 'NUMS384W', 'NUMS384E', 'NUMS512W', 'NUMS512E', 'TWEEDLEDUM', 'TWEEDLEDEE', 'BN254', 'BN254CX', 'BLS12383', 'BLS12381', 'FP256BN', 'FP512BN', 'BLS12461', 'BN462', 'BLS24479', 'BLS48556', 'BLS48581', 'BLS48286'];

This library supports also RSA encryption/decryption and RSA signature. The following is a quick example on how to use RSA. First initialize the context

var ctx = new CTX("RSA2048");

then you can call the RSA functions as follows:

ctx.RSA.ENCRYPT(...);
ctx.RSA.DECRYPT(...);

The following is the list of all the RSA security level supported by MIRACL Core JS

['RSA2048','RSA3072','RSA4096'];

MIRACL Core JS supports also SHA256, SHA384, SHA512, SHA3, AES-GCM encryption and a secure random number generator. Those functions are contained in every context initialized with RSA or with an elliptic curve. If you want to create a context supporting only those general functions then initialize it with no parameter as follows:

var ctx = new CTX();

To use this library in Node.js import it as follows:

var CTX = require('./index.js');

It is also possible to use it as a npm package. Install it locally into your project with:

npm install --save <path-to-this-library>

As an example in React it is possible to install the library with npm and import it with

const ctx = require('miracl-core-js').CTX;

After the import the library is used as described above.

To see some running examples using your favourite browser, navigate to the examples/browser folder, and load for example TestECC.html

Alternatively if using node.js navigate to the examples/node folder, and execute for example

node BenchBN254.js

Note that the optimizer does not like context changes, so the individual benchmarks run faster.

You might have to wait a few seconds for the benchmarking scripts to complete.

For TestMPIN the correct PIN number is 1234.