Is it secure to expose cryptographic RPCs?

[nchashch]

Right now we have ripemd160 and hmac_sha512 RPCs, implemented in #63 .

hmac_sha512 is supposed to be used by the launcher GUI in order to derive the seed of mainchain wallet and all sidechain wallet seed from a single master seed 12 words.

After
LayerTwo-Labs/cusf_sidechain_proto#15
is done we will implement assymetric cryptography RPCs:

Edit: These are already implemented in #75

Ecdsa(private key) ---> public key
Sign( r , m ) --> s
Verify( P, m , s) ---> True/False

The RPCs are only supposed to be used locally by the GUI launcher, so it might be good enough.

[nchashch]

Public cryptography RPCs are implemented in #75 .

[nchashch]

I'll keep this one open, just as a reminder to revisit this before actually going to production.