constantine/tests/support/canaries.nim

32 lines
1.1 KiB
Nim

# Constantine
# Copyright (c) 2018-2019 Status Research & Development GmbH
# Copyright (c) 2020-Present Mamy André-Ratsimbazafy
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at http://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at http://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
import
../../constantine/arithmetic/bigints,
../../constantine/config/[common, curves],
../../constantine/elliptic/[ec_shortweierstrass_affine, ec_shortweierstrass_projective]
# Canaries
# --------------------------------------------------------------
#
# This file initializes a type with canary
# to detect initialization bugs that are silent
# when initialized from zero.
when sizeof(SecretWord) == 8:
const Canary = SecretWord(0xAAFACADEAAFACADE'u64)
else:
const Canary = SecretWord(0xAAFACADE'u32)
func canary*(T: typedesc): T =
when T is BigInt:
for i in 0 ..< result.limbs.len:
result.limbs[i] = Canary
else:
{.error: "Not implemented".}