React native rsa crypto lib
The use case
Initially this was created for encrypted messaging
Client would generate RSA key pairs and store private key locally and share the public key.
How to use
npm install react-native-rsa
Generate RSA keys
var RSAKey = require('react-native-rsa'); const bits = 1024; const exponent = '10001'; // must be a string. This is hex string. decimal = 65537 var rsa = new RSAKey(); rsa.generate(bits, exponent); var publicKey = rsa.getPublicString(); // return json encoded string var privateKey = rsa.getPrivateString(); // return json encoded string
var rsa = new RSAKey(); rsa.setPublicString(publicKey); var originText = 'sample String Value'; var encrypted = rsa.encrypt(originText);
rsa.setPrivateString(privateKey); var decrypted = rsa.decrypt(encrypted); // decrypted == originText
Tested works with ursa in nodejs (with ursa padding set to PKCS1).
This lib uses Tom Wu's jsbn http://www-cs-students.stanford.edu/~tjw/jsbn/
TODO: Still missing export to PEM format
- Node js may complain about 'window' is not defined. I just commented out the 'window' related codes in rng.js and it worked. (It look like just adding some extra randomness. Should still work without that part). I don't recommend using this lib in nodejs. I use ursa or node-rsa lib for nodejs.