jsrsasign

The 'jsrsasign' (RSA-Sign JavaScript Library) is an opensource free cryptography library supporting RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp, CAdES JSON Web Signature/Token/Key in pure JavaScript.

Public page is https://kjur.github.io/jsrsasign .

Your bugfix and pull request contribution are always welcomed :)

NOTICE FOR COMMING 11.0.0 RELEASE

The "jsrsasign" library is a long lived JavaScript library from 2010 developed with old JavaScript style and backword compatibility. From coming release 11.0.0, following are planed and suport them gradually:

Stop to support Internet Explorer.
Stop to support bower.
Modern ECMA functions will be introduced such as Promise, let, Array methods or class.
API document generator will be changed from Jsdoc Toolkit to JSDoc3.
Module bandler will be used such as browserify or webpack.
Not to use YUI compressor.
Unit test framework will be changed from QUnit and mocha to jest.
W3C Web Crypto API support.
split into some modules besides jsrsasign have been all in package before 11.0.0.

NEWS

2024-Jan-16: Security advisory and update for Marvin attack vulnerability published. Due to this vulnerability, RSA PKCS#1.5 and RSAOAEP encryption/decryption no longer be supported.
2023-Mar-12: 10.7.0 Release. Now supports custom X.509 extension and custom OIDs by new "Add-on" architecture. (See here in detail)
2021-Nov-21: 10.5.0 Release. Now supports secp521r1(P-521) ECDSA.
2021-Apr-14: Security advisory and update for CVE-2021-30246 RSA signature validation vulnerability published
2020-Oct-05: jsrsasign won Google Open Source Peer Bonus Award. Thank you Google.
2020-Sep-23: 10.0.0 released for CMS SignedData related class including timestamp and CAdES architecture update
2020-Aug-24: 9.1.0 released to new CRL APIs align with certificate
2020-Aug-19: 9.0.0 released for major update of certificate and CSR generation and parsing without backward compatibility. Please see migration guide in detail.
2020-Aug-02: twitter account @jsrsasign started for announcement. please follow.

HIGHLIGHTS

Swiss Army Knife style all in one package crypto and PKI library
available on Node.js and browsers
Long live open source software from 2010
very easy API to use
powerful various format key loader and ASN.1 API
rich document and samples
no dependency to other library
no dependency to W3C Web Cryptography API nor OpenSSL
no dependency on newer ECMAScirpt function. So old browsers also supported.
very popular crypto library with 1M+ npm downloads/month
supports "Add-on" architecture

INSTALL

Node NPM

> npm install jsrsasign jsrsasign-util

Bower

> bower install jsrsasign

Or include in HTML from many CDN sites

> <script src="https://cdnjs.cloudflare.com/ajax/libs/jsrsasign/8.0.20/jsrsasign-all-min.js"></script>

USAGE

Loading encrypted PKCS#5 private key:

> var rs = require('jsrsasign');
> var rsu = require('jsrsasign-util');
> var pem = rsu.readFile('z1.prv.p5e.pem');
> var prvKey = rs.KEYUTIL.getKey(pem, 'passwd');

Sign string 'aaa' with the loaded private key:

> var sig = new a.Signature({alg: 'SHA1withRSA'});
> sig.init(prvKey);
> sig.updateString('aaa');
> var sigVal = sig.sign();
> sigVal
'd764dcacb...'

RECENT SECURITY ADVISORY

published	fixed version	title/advisory	CVE	CVSS
2024Jan16	11.0.0	Marvin attack vulnerability for RSA and RSAOAEP decryption	CVE-2024-21484	7.5
2022Jun24	10.5.25	JWS and JWT signature validation vulnerability with special characters	CVE-2022-25898	?
2021Apr14	10.2.0	RSA signature validation vulnerability on maleable encoded message	CVE-2021-30246	9.1
2020Jun22	8.0.19	ECDSA signature validation vulnerability by accepting wrong ASN.1 encoding	CVE-2020-14966	5.5
2020Jun22	8.0.18	RSA RSAES-PKCS1-v1_5 and RSA-OAEP decryption vulnerability with prepending zeros	CVE-2020-14967	4.8
2020Jun22	8.0.17	RSA-PSS signature validation vulnerability by prepending zeros	CVE-2020-14968	4.2

Here is full published security advisory list.

DONATIONS

If you like jsrsasign and my other project, you can support their development by donation through any of the platform/services below. Thank you as always.