2 Commits

Author	SHA1	Message	Date
Mamy Ratsimbazafy	4ccd8aaab8	EVM modexp: solve DOS vectors (#286) ... * stash prep for Barret Reduction * benches lost in rebase * fix vartime reduction * some improvement and fixes on reduce_vartime * Fuse reductions when converting to Montgomery + use window=1 in powMont for small exponents. ~2.7x to 3.3x accel * modexp: Introduce a no-reduction path for small base+exponent compared to modulus. Fix DOS * optim for padded exponents * remove commented out code [skip ci] * Missing noInline for allocStackArray	2023-10-19 01:20:52 +02:00
Mamy Ratsimbazafy	b1ef2682d6	Modular exponentiation (arbitrary output) and EIP-198 (#242) ... * implement arbitrary precision modular exponentiation (prerequisite EIP-198) * [modexp] implement exponentiation modulo 2ᵏ * add inversion (mod 2ᵏ) * [modexp] High-level wrapper for powmod with odd modulus * [modexp] faster exponentiation (mod 2ᵏ) for even case and Euler's totient function odd case * [modexp] implement general fast modular exponentiation * Fix modular reduction with 64-bit modulus + fuzz powmod vs GMP * add benchmark * add EIP-198 support * fixups following self review * fix test paths	2023-06-01 23:38:41 +02:00