blst exposes two add functions: one that works for the corner case
of doubling, and one that isn't. It seems safer to use the one that
works, even if it is highly improbable in these cases that doubling
would occur.
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
Scalar multiplications in tag generation can be rearranged
to benefit from the way random points are being generated.
Since random points are themselves generated using scalar
multiplication and the base is common, the sum of multiplications
becomes a single multiplication with the scalar sum, resulting in
a nice speedup.
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
Implementation of the BLS-based public PoS scheme from
Shacham H., Waters B., "Compact Proofs of Retrievability"
using pairing over BLS12-381 ECC
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
mmap has serveral potential issues and we do not really need it, so
changing to use the normal system file interface is better.
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
Minimal working version with lots of error checks and corrections
still needed.
- using Bearssl RSA code through libp2p
- with selecteble BigInt library for experimentation
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
