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README.md
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 https://kjur.github.io/jsrsasign .
github TOP|API doc|Wiki|Node sample
DIFFERENCE WITH CRYPTO MODULE
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)
AVAILABLE CLASSES AND METHODS
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:
- r.BigInteger - BigInteger class
- r.RSAKey - RSAKey class
- r.ECDSA - KJUR.crypto.ECDSA class
- r.DSA - KJUR.crypto.DSA class
- r.Signature - KJUR.crypto.Signature class
- r.MessageDigest - KJUR.crypto.MessageDigest class
- r.Mac - KJUR.crypto.Mac class
- r.KEYUTIL - KEYUTIL class
- r.ASN1HEX - ASN1HEX class
- r.crypto - KJUR.crypto name space
- r.asn1 - KJUR.asn1 name space
- r.jws - KJUR.jws name space
Please see API reference in the above links.
EXAMPLE(1) SIGNATURE
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...'