lisk.crypto.verifyMessageWithPublicKey(signature, publicKey) should take care of invalid input

[slaweet]

Expected behaviour

When there is something wrong with signature or publicKey, then it should throw an error that says that

> lisk.crypto.verifyMessageWithPublicKey('b146607c3fce1aaef4e52a632ab5eddc83fc18d3b3b6f97fdd531568fa1b236687a1bbadc65c9fa8b62f00ec4e5c80d1ef4bce09bd4ac475393f0a39f7376c0668656c6c6faERROR', '197cf311f678406bc72a8edfdc3dffe6f59f49c4550a860e4b68fb20382211d0')
Uncaught Error {message: "Invalid signature"}

> lisk.crypto.verifyMessageWithPublicKey('b146607c3fce1aaef4e52a632ab5eddc83fc18d3b3b6f97fdd531568fa1b236687a1bbadc65c9fa8b62f00ec4e5c80d1ef4bce09bd4ac475393f0a39f7376c0668656c6c6fa', '197cf311f678406bc72a8edfdc3dffe6f59f49c4550a860e4b68fb20382211d0ERROR')
Uncaught Error {message: "Invalid public key"}

Actual behaviour

Currently it throws some arbitrary error from the underlying library

> lisk.crypto.verifyMessageWithPublicKey('b146607c3fce1aaef4e52a632ab5eddc83fc18d3b3b6f97fdd531568fa1b236687a1bbadc65c9fa8b62f00ec4e5c80d1ef4bce09bd4ac475393f0a39f7376c0668656c6c6faERROR', '197cf311f678406bc72a8edfdc3dffe6f59f49c4550a860e4b68fb20382211d0')
nacl_factory.js?7fc7:74 Uncaught TypeError: Cannot read property 'length' of null
    at decode_latin1 (eval at <anonymous> (app.js:3784), <anonymous>:74:24)
    at Object.decode_utf8 (eval at <anonymous> (app.js:3784), <anonymous>:69:35)
    at Object.verifyMessageWithPublicKey (eval at <anonymous> (app.js:4720), <anonymous>:67:22)
    at <anonymous>:1:13
decode_latin1 @ nacl_factory.js?7fc7:74
decode_utf8 @ nacl_factory.js?7fc7:69
verifyMessageWithPublicKey @ sign.js?e51f:67
(anonymous) @ VM379906:1

> lisk.crypto.verifyMessageWithPublicKey('b146607c3fce1aaef4e52a632ab5eddc83fc18d3b3b6f97fdd531568fa1b236687a1bbadc65c9fa8b62f00ec4e5c80d1ef4bce09bd4ac475393f0a39f7376c0668656c6c6fa', '197cf311f678406bc72a8edfdc3dffe6f59f49c4550a860e4b68fb20382211d0ERROR')
nacl_factory.js?7fc7:145 Uncaught Object {message: "nacl.crypto_sign_open expected 32-byte pk but got length 34"}