simplecrypto for javascript

Purpose

Simple Javascript cryptography library that wraps incompatible WebCrypto implementations, utilizes encryption algorithms that all WebCrypto enabled browsers support and provides a much simpler interface.

Supported Browsers

(Desktop and mobile versions)

• Chrome 41+
• Firefox 37+
• Internet Explorer 11+
• Safari 8.1+ (RSA signing is not available due to a WebKit bug)

Examples

Common

var data = new Uint8Array([5,4,3,2,1]);

var logError = function() {
    console.log(arguments);
}    

Symmetric

var aesKey = new Uint8Array([1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6]);
var hmacKey = new Uint8Array([1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6]);

simpleCrypto.sym.encrypt(keys, data, logError, function(encrypted) {
    simpleCrypto.sym.decrypt(keys, encrypted, logError.bind(null, done), function(decrypted) {});
});

Asymmetric

simpleCrypto.asym.generateEncryptKey(logError, function(keys){
    simpleCrypto.asym.encrypt(key.publicKey, data, logError, function(encrypted) {
        simpleCrypto.asym.decrypt(key.privateKey, encrypted, logError.bind(null, done), function(decrypted){});
    });
});

Please see Unit Tests for more examples

Documentation

API

FAQ

Q: Why another Javascript Crypto library?
A: Simplecrypto is built on top of WebCrypto and IndexedDB. Performance advantage over other libraries is significant. IndexedDB provides for safer storage of Javascript keys.

Q: Why AES-CBC-HMAC instead of AES-GCM?
A: WebKit does not support AES-GCM.

Q: PBKDF2?
A: Safari, IE and Chrome on Linux do not support PBKDF2, but support HMAC-SHA1.
Small shim is used to implement PBKDF2 in thise cases. Elsewhere, native PBKDF2 support is used.

License

Apache 2.0