gnark is vulnerable to signature malleability in EdDSA and ECDSA due to missing scalar checks

In version before, sig.s used without asserting 0 ≤ S order in Verify function in eddsa.go and ecdsa.go, which will lead to signature malleability vulnerability. Impact Since gnark’s native EdDSA and ECDSA circuits lack essential constraints, multiple distinct witnesses can satisfy the same publi...