CRC64 - PKI Addition

[GabryJ84]

Hello,
I discovered this library and I find it very useful.

Is there any intention to add following algorithms?

CRC:
CRC64

PKI Encryption:
Elgamal
ECElgamal
RSA (KeyLength 64-128-256-512-1024-2048-4096-8192)
DSA
GOSTDSA
ECDSA
HFE LL

PKI Signature:
Elgamal
ECElgamal
RSA (KeyLength 64-128-256-512-1024-2048-4096-8192)
DSA
GOSTDSA
ECDSA
HFE IP-/IPv