GitLab

* ecc-mod-arith.c (ecc_mod_mul, ecc_mod_sqr): Separate argument
for scratch area, reducing required size of result area. Update
all callers to naïvely keep using result in scratch area.
(ecc_mod_pow_2k, ecc_mod_pow_2k_mul): Simplified, also reducing
required size of result area.

* ecc-internal.h (typedef ecc_mod_func): Add separate result
argument. Updated all C implementations and callers.

Updated and renamed sec_modinv -> ecc_mod_inv, and deleted the
ecc_modp_inv and ecc_modq_inv wrapper functions.