Node-RSA

Node.js RSA library Based on jsbn library from Tom Wu http://www-cs-students.stanford.edu/~tjw/jsbn/

• Pure JavaScript
• No needed OpenSSL
• Supports long messages for encrypt/decrypt

Building and Installing

npm install node-rsa

Testing

npm test

Usage

Create instance

"Empty" key

var key = new NodeRSA();

Generate new key 512bit-length and with public exponent 65537

var key =  NodeRSA({b: 512});

Load key from PEM string

var key = new NodeRSA('-----BEGIN RSA PRIVATE KEY-----\n'+
                      'MIIBOQIBAAJAVY6quuzCwyOWzymJ7C4zXjeV/232wt2ZgJZ1kHzjI73wnhQ3WQcL\n'+
                      'DFCSoi2lPUW8/zspk0qWvPdtp6Jg5Lu7hwIDAQABAkBEws9mQahZ6r1mq2zEm3D/\n'+
                      'VM9BpV//xtd6p/G+eRCYBT2qshGx42ucdgZCYJptFoW+HEx/jtzWe74yK6jGIkWJ\n'+
                      'AiEAoNAMsPqwWwTyjDZCo9iKvfIQvd3MWnmtFmjiHoPtjx0CIQCIMypAEEkZuQUi\n'+
                      'pMoreJrOlLJWdc0bfhzNAJjxsTv/8wIgQG0ZqI3GubBxu9rBOAM5EoA4VNjXVigJ\n'+
                      'QEEk1jTkp8ECIQCHhsoq90mWM/p9L5cQzLDWkTYoPI49Ji+Iemi2T5MRqwIgQl07\n'+
                      'Es+KCn25OKXR/FJ5fu6A6A+MptABL3r8SEjlpLc=\n'+
                      '-----END RSA PRIVATE KEY-----');

Also you can use next methods:

key.generateKeyPair([bits], [exp]); // exp = 65537 by default
key.loadFromPEM(pem_string);

Export keys

key.toPrivatePEM();
key.toPublicPEM([strict]);

• strict - if true method will return false if key pair have private exponent. Default false.

Test key

key.isPrivate();
key.isPublic();

Encrypting/decrypting

key.encrypt(buffer, [source_encoding], [output_encoding]);

• buffer - data for encrypting, may be string, Buffer, or any object/array. Arrays and objects will encoded to JSON string first.
• source_encoding - source encoding, works only with string buffer. Can take standard Node.js Buffer encodings (hex, utf8, base64, etc). Utf8 by default.
• output_encoding - encoding for output result, can also take 'buffer' to return Buffer object. Default base64.

key.decrypt(buffer, [encoding]);

• buffer - data for decrypting. Takes Buffer object.
• encoding - encoding for result string. Can also take 'buffer' for raw Buffer object, or 'json' for automatic JSON.parse result.

Contributing

Questions, comments, bug reports, and pull requests are all welcome.

License for NodeRSA.js

Copyright (c) 2014 rzcoder

All Rights Reserved.

BSD

Licensing for code used in rsa.js and jsbn.js

Copyright (c) 2003-2005 Tom Wu All Rights Reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

IN NO EVENT SHALL TOM WU BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

In addition, the following condition applies:

All redistributions must retain an intact copy of this copyright notice and disclaimer.