X-Git-Url: https://git.cryptolib.org/?p=arm-crypto-lib.git;a=blobdiff_plain;f=keysize_descriptor.c;h=b9a8d71f207a0b5d1cf26792cf442e17a694868f;hp=8ffb06f7eb55928d763b92725605d83b8b504036;hb=61b5214b9a948a74fe9c22586b84d19d24537fdb;hpb=3f2f2071c47e2e424af71cc85697f3eb26c24277

diff --git a/keysize_descriptor.c b/keysize_descriptor.c
index 8ffb06f..b9a8d71 100644
--- a/keysize_descriptor.c
+++ b/keysize_descriptor.c
@@ -1,7 +1,7 @@
 /* keysize_descriptor.c */
 /*
-    This file is part of the ARM-Crypto-Lib.
-    Copyright (C) 2006-2010  Daniel Otte (daniel.otte@rub.de)
+    This file is part of the AVR-Crypto-Lib.
+    Copyright (C) 2009  Daniel Otte (daniel.otte@rub.de)
 
     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
@@ -25,6 +25,7 @@
  */
 
 #include <stdint.h>
+#include <stdlib.h>
 #include "keysize_descriptor.h"
 
 uint8_t is_valid_keysize_P(const void* ks_desc, uint16_t keysize){
@@ -77,11 +78,84 @@ uint16_t get_keysize(const void* ks_desc){
 	uint8_t type;
 	uint16_t keysize;
 	type = *((uint8_t*)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 = *((uint16_t*)ks_desc);
+	keysize = *((uint8_t*)ks_desc);
 	return keysize;
 }
 
-
+uint16_t get_keysizes(const void* ks_desc, uint16_t** list){
+	uint8_t type;
+	uint16_t items;
+	uint8_t i;
+	type = *((uint8_t*)ks_desc);
+	ks_desc = (uint8_t*)ks_desc + 1;
+	if(type==KS_TYPE_LIST){
+		items = *((uint8_t*)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] = *((uint16_t*)ks_desc);
+			ks_desc = (uint8_t*)ks_desc + 2;
+		}
+		return items;
+	}
+	if(type==KS_TYPE_ARG_RANGE){
+		uint16_t min, max, distance, offset;
+		min = *((uint16_t*)ks_desc);
+		ks_desc = (uint8_t*)ks_desc + 2;
+		max = *((uint16_t*)ks_desc);
+		ks_desc = (uint8_t*)ks_desc + 2;
+		distance = *((uint16_t*)ks_desc);
+		ks_desc = (uint8_t*)ks_desc + 2;
+		offset = *((uint16_t*)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;
+	}
+	if(type==KS_TYPE_RANGE){
+		uint16_t min, max, distance=8, offset=0;
+		min = *((uint16_t*)ks_desc);
+		ks_desc = (uint8_t*)ks_desc + 2;
+		max = *((uint16_t*)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;
+}