jsrsasign

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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

• 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...'

MORE TUTORIALS AND SAMPLES

• Tutorials in GitHub Wiki
• Sample Node Scripts

RECENT SECURITY ADVISORY

|published|fixed version|title/advisory|CVE|CVSS| |:---|:---|:---|:---|:---| |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.

Github Sponsors

You can sponsor jsrsasign with the GitHub Sponsors program.

Cryptocurrency

You can donate cryptocurrency to jsrsasign using the following addresses:

• Bitcoin(BTC): 34vSRe7XHoMy78HKgps9YJ5BrBLYJLeM22
• Ethereum(ETH): 0x9c4cdbb531e5b84796ff5f91a9f652704761e64e
• Litecoin(LTC): LPf3VDJVamwPcNJNjjVtrUQuJQ17ZyWzeU
• Bitcoin Cash(BCH): bitcoincash:pq3hy08pc9vm57q6ddgsc06cqdffmfzwwqxd9yejyf