/* keysize_descriptor.c */
/*
This file is part of the AVR-Crypto-Lib.
- Copyright (C) 2009 Daniel Otte (daniel.otte@rub.de)
+ Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
/**
* \file keysize_descriptor.c
* \author Daniel Otte
- * \email daniel.otte@rub.de
+ * \email bg@nerilex.org
* \date 2009-01-07
* \license GPLv3 or later
*/
#include <stdint.h>
+#include <stdlib.h>
#include <avr/pgmspace.h>
#include "keysize_descriptor.h"
uint8_t is_valid_keysize_P(PGM_VOID_P ks_desc, uint16_t keysize){
uint8_t type;
type = pgm_read_byte(ks_desc++);
- if(type==KS_TYPE_TERMINATOR)
+ if (type == KS_TYPE_TERMINATOR) {
return 0;
- if(type==KS_TYPE_LIST){
+ }
+ if (type == KS_TYPE_LIST) {
uint8_t items;
uint16_t item;
items = pgm_read_byte(ks_desc++);
- while(items--){
+ while (items--) {
item = pgm_read_word(ks_desc);
ks_desc = (uint8_t*)ks_desc + 2;
- if(item==keysize)
+ if (item == keysize) {
return 1;
+ }
}
ks_desc = (uint8_t*)ks_desc - 2;
}
- if(type==KS_TYPE_RANGE){
+ if (type == KS_TYPE_RANGE) {
uint16_t max, min;
min = pgm_read_word(ks_desc);
ks_desc = (uint8_t*)ks_desc + 2;
max = pgm_read_word(ks_desc);
- if(min<=keysize && keysize<=max)
+ if (min <= keysize && keysize <= max) {
return 1;
+ }
}
- if(type==KS_TYPE_ARG_RANGE){
+ if (type == KS_TYPE_ARG_RANGE) {
uint16_t max, min, dist, offset;
min = pgm_read_word(ks_desc);
ks_desc = (uint8_t*)ks_desc + 2;
dist = pgm_read_word(ks_desc);
ks_desc = (uint8_t*)ks_desc + 2;
offset = pgm_read_word(ks_desc);
- if(min<=keysize && keysize<=max && (keysize%dist==offset))
+ if (min <= keysize && keysize <= max && (keysize % dist == offset)) {
return 1;
+ }
}
- if(type>KS_TYPE_ARG_RANGE){
+ if (type > KS_TYPE_ARG_RANGE) {
/* bad error, you may insert a big warning message here */
return 0;
}
- return is_valid_keysize_P((uint8_t*)ks_desc+1, keysize); /* search the next record */
+ return is_valid_keysize_P((uint8_t*)ks_desc + 1, keysize); /* search the next record */
}
uint16_t get_keysize(PGM_VOID_P ks_desc){
uint8_t type;
uint16_t keysize;
type = pgm_read_byte(ks_desc);
- if(type==KS_TYPE_LIST)
+ if(type==KS_TYPE_LIST){
ks_desc = (uint8_t*)ks_desc + 1;
+ }
ks_desc = (uint8_t*)ks_desc + 1;
keysize = pgm_read_word(ks_desc);
return keysize;
}
-
+uint16_t get_keysizes(PGM_VOID_P ks_desc, uint16_t** list){
+ uint8_t type;
+ uint16_t items;
+ uint8_t i;
+ type = pgm_read_byte(ks_desc);
+ ks_desc = (uint8_t*)ks_desc + 1;
+ if(type==KS_TYPE_LIST){
+ items = pgm_read_byte(ks_desc);
+ ks_desc = (uint8_t*)ks_desc + 1;
+ if(!*list){
+ *list = malloc(items*2);
+ if(!*list){
+ return 0;
+ }
+ }
+ for(i=0; i<items; ++i){
+ ((uint16_t*)(*list))[i] = pgm_read_word(ks_desc);
+ ks_desc = (uint8_t*)ks_desc + 2;
+ }
+ return items;
+ }
+ if(type==KS_TYPE_ARG_RANGE){
+ uint16_t min, max, distance, offset;
+ min = pgm_read_word(ks_desc);
+ ks_desc = (uint8_t*)ks_desc + 2;
+ max = pgm_read_word(ks_desc);
+ ks_desc = (uint8_t*)ks_desc + 2;
+ distance = pgm_read_word(ks_desc);
+ ks_desc = (uint8_t*)ks_desc + 2;
+ offset = pgm_read_word(ks_desc);
+ ks_desc = (uint8_t*)ks_desc + 2;
+ items = (max-min)/distance+1;
+ if(min%distance!=offset){
+ --items;
+ min += (distance-(min%distance-offset))%distance;
+ }
+ if(!*list){
+ *list = malloc(items*2);
+ if(!*list){
+ return 0;
+ }
+ }
+ i=0;
+ while(min<=max){
+ ((uint16_t*)*list)[i++] = min;
+ min += distance;
+ }
+ return i;
+ }
+ if(type==KS_TYPE_RANGE){
+ uint16_t min, max, distance=8, offset=0;
+ min = pgm_read_word(ks_desc);
+ ks_desc = (uint8_t*)ks_desc + 2;
+ max = pgm_read_word(ks_desc);
+ items = (max-min)/distance+1;
+ if(min%distance!=offset){
+ --items;
+ min += (distance-(min%distance-offset))%distance;
+ }
+ if(!*list){
+ *list = malloc(items*2);
+ if(!*list){
+ return 0;
+ }
+ }
+ i=0;
+ while(min<=max){
+ ((uint16_t*)*list)[i++] = min;
+ min += distance;
+ }
+ return i;
+ }
+ return 0;
+}