void skein256_init(skein_t* ctx, W64* key, W64 outlen) {
W64 config[4] = {0x0000000133414853, outlen, 0, 0};
static W64 zeroes[4] = {0,0,0,0};
/* Set up key if needed */
if(key != NULL) {
init_tweak(T_KEY, ctx->tweak);
set_last(1, ctx->tweak);
add_bytes(32, ctx->tweak);
encrypt256(zeroes, ctx->tweak[0], ctx->tweak[1], key, ctx->key);
ctx->key[0] ^= key[0];
ctx->key[1] ^= key[1];
ctx->key[2] ^= key[2];
ctx->key[3] ^= key[3];
} else {
ctx->key[0] = 0; ctx->key[1] = 0; ctx->key[2] = 0; ctx->key[3] = 0;
}
/* Process config string */
mk_config_tweak(ctx->tweak);
add_bytes(32, ctx->tweak);
encrypt256(ctx->key, ctx->tweak[0], ctx->tweak[1], config, ctx->key);
ctx->key[0] ^= config[0];
ctx->key[1] ^= config[1];
ctx->key[2] ^= config[2];
ctx->key[3] ^= config[3];
}
void skein256_output(skein_t* ctx, int from, int to, W64* out) {
W64 buf[4] = {from,0,0,0};
W64 *k = ctx->key;
W64 *tweak = ctx->tweak;
for(; from <= to; ++from) {
init_tweak(T_OUT, tweak);
set_last(1, tweak);
add_bytes(8, tweak);
encrypt256(k, tweak[0], tweak[1], buf, out);
out += 4;
++buf[0];
}
}
void skein256_update(skein_t* ctx, int firstlast, UBIType type, W64 len, W64* data) {
W64 buf[4] = {0,0,0,0};
W64* k = ctx->key;
W64* tweak = ctx->tweak;
int lastlen;
/* Process message */
if(firstlast & 1) {
init_tweak(type, tweak);
}
/* If this is not the last update, don't do last block processing */
if(!(firstlast & 2) && len % 32 == 0) {
++len;
}
while(len > 32) {
add_bytes(32, tweak);
encrypt256(k, tweak[0], tweak[1], data, k);
set_first(0, tweak);
k[0] ^= *data; ++data;
k[1] ^= *data; ++data;
k[2] ^= *data; ++data;
k[3] ^= *data; ++data;
len -= 32;
}
/* Process last block */
if(firstlast & 2) {
lastlen = len % 32;
if(lastlen == 0 && len > 0) {
lastlen = 32;
}
add_bytes(lastlen, tweak);
set_last(1, tweak);
memcpy(buf, data, lastlen);
encrypt256(k, tweak[0], tweak[1], buf, k);
k[0] ^= buf[0];
k[1] ^= buf[1];
k[2] ^= buf[2];
k[3] ^= buf[3];
}
}
gboolean mouse_clicked(GtkWidget *widget, GdkEventButton *event)
{
// Handle click event on canvas
int index;
double coordx, coordy;
select_t *select = NULL;
// Length from click location to nearest dot
mouse_discarded = 0;
if (event->button == 8)
{
// back button
if (event->state == GDK_SHIFT_MASK)
set_prev_count();
else if (event->state == GDK_CONTROL_MASK)
set_first();
else
set_prev();
fldstate.mouse_clicked = 0x0;
}
else if (event->button == 9)
{
// forward button
if (event->state == GDK_SHIFT_MASK)
set_next_count();
else if (event->state == GDK_CONTROL_MASK)
set_last();
else
set_next();
fldstate.mouse_clicked = 0x0;
}
else if (event->button == 1)
{
fldstate.mouse_clicked = 0x1;
mouse_clickx = event->x;
mouse_clicky = event->y;
pixel_to_field(&mouse_clickx, &mouse_clicky);
fldstate.mouse_clickx = mouse_clickx;
fldstate.mouse_clicky = mouse_clicky;
switch(mouse_currentMode)
{
case SELECTONE:
// select 1 performer
select = field_get_in_area(mouse_clickx, mouse_clicky);
if (event->state == GDK_CONTROL_MASK)
{
// ctrl-click
select_toggle_multiple(pstate.select, select);
}
else if ((event->state & ~GDK_SHIFT_MASK)== 0)
{
// regular click
if (select_empty(select))
{
//select_dots_discard();
select_clear(pstate.select);
mouse_discarded = 1;
break;
}
index = select_get_form(select);
if (!select_form_empty(select) && !select_check_form(pstate.select, index))
{
// select form with ability to scale form
select_clear(pstate.select);
mouse_discarded = 1;
select_add_form(pstate.select, select_get_form(select));
select_update_center(pstate.select);
}
else if (select_form_empty(select) && isSelected(select_get_dot(select)) != 1)
{
// dot is not selected
select_clear(pstate.select);
mouse_discarded = 1;
if ((index = select_get_dot(select))!= -1)
{
select_add_dot(pstate.select, index);
}
}
else
{
// hold click; dots being moved
fldstate.mouse_clicked |= 0x2;
}
}
dr_canvas_refresh(drill);
break;
case ADDPERF:
// Add performers by clicking on canvas
coordx = event->x;
coordy = event->y;
pixel_to_field(&coordx, &coordy);
index = perf_add();
//coords_set_coord(pshow, index, coordx, coordy);
coords_set(pshow->sets->currset->coords[index], coordx, coordy);
dr_canvas_refresh(drill);
break;
case ADDFORM:
break;
}
}
else
fldstate.mouse_clicked = 0;
return TRUE;
}
