chacha_ivsetup
void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr)
chacha_ivsetup(&ctx->header_ctx, seqbuf, NULL);
chacha_ivsetup(&ctx->main_ctx, seqbuf, one);
chacha_ivsetup(&ctx->header_ctx, seqbuf, NULL);
chacha_ivsetup(&ctx->main_ctx, seqbuf, NULL);
chacha_ivsetup(&rsx->rs_chacha, buf + KEYSZ);
chacha_ivsetup(&rsx->rs_chacha, buf + KEYSZ, NULL);
chacha_ivsetup(ctx, iv + 8, iv);
LOCAL void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv CHACHA_UNUSED,
chacha_ivsetup(ctx, NULL, (const void *)&lectr);
chacha_ivsetup(ctx, NULL, (const void *)&ctr);
chacha_ivsetup(&context->chacha, NULL, (const void *)&lectr);
chacha_ivsetup(&kdc->kdc_chacha, kdc->kdc_iv, NULL);
chacha_ivsetup(&chacha20->ctx, (u_char *)&tv_now.tv_sec, (u_char *)&tv_now.tv_usec);