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jsrsasign

opensource free pure JavaScript cryptographic library supports RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp and CAdES and JSON Web Signature(JWS)/Token(JWT)/Key(JWK)

jsrsasign

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

Public page is http://kjur.github.com/jsrsasign .

github TOP|API doc|Wiki|Node sample

Here is the difference between bundled 'Crypto' module and this 'jsrsasign' module.

  • Crypto module
    • fast
    • works only on Node.js
    • OpenSSL based
    • lacking ASN.1 functionality
    • provides symmetric ciphers
    • lacking RSAPSS signing
  • jsrsasign module
    • slow
    • implemented in pure JavaScript
    • works on both Node.js(server) and browsers(client)
    • provides ASN.1 parsing/generation functionality
    • lacking symmetric ciphers
    • provides RSAPSS signing
    • also provides support for JSON Web Signatures (JWS) and JSON Web Token (JWT)

Most of the classes and methods defined in jsrsasign available in this jsrsasign npm module.

After loading the module,

> var r = require('jsrsasign');
> var r = require('jsrsasign-util'); // for file I/O utilities

You can refer name spaces, classes, methods and functions by following variables:

Please see API reference in the above links.

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...'