Symbol: bn_sub
lib/libcrypto/bn/bn_add.c
200
borrow = bn_sub(r->d, rn, a->d, a->top, b->d, b->top);
lib/libcrypto/bn/bn_local.h
253
BN_ULONG bn_sub(BN_ULONG *r, int r_len, const BN_ULONG *a, int a_len,