From 2c997f95cb167e9023c1a44abaeda4ea80bbc7d3 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Thu, 8 Aug 2013 22:39:50 +0000
Subject: moved usb-i2c-sl018 to tuer-rfid

git-svn-id: https://svn.spreadspace.org/avr/trunk@216 aa12f405-d877-488e-9caf-2d797e2a1cc7
---
 usb-i2c-sl018/keystore.c | 111 -----------------------------------------------
 1 file changed, 111 deletions(-)
 delete mode 100644 usb-i2c-sl018/keystore.c

(limited to 'usb-i2c-sl018/keystore.c')

diff --git a/usb-i2c-sl018/keystore.c b/usb-i2c-sl018/keystore.c
deleted file mode 100644
index 645f25a..0000000
--- a/usb-i2c-sl018/keystore.c
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- *  spreadspace avr utils
- *
- *
- *  Copyright (C) 2013 Christian Pointner <equinox@spreadspace.org>
- *                     Othmar Gsenger <otti@wirdorange.org>
- *
- *  This file is part of spreadspace avr utils.
- *
- *  spreadspace avr utils is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  any later version.
- *
- *  spreadspace avr utils is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "keystore.h"
-#include <avr/eeprom.h>
-#include <stdio.h>
-#include <string.h>
-
-#include "led.h"
-#include "anyio.h"
-
-#define EEPROM_SIZE 1024
-typedef uint8_t keyslot_t[8];
-keyslot_t EEMEM keystore[EEPROM_SIZE/sizeof(keyslot_t)];
-
-
-void keystore_flash_from_stdio(void)
-{
-  keyslot_t ks;
-  uint8_t byte_pos=0;
-  printf("Info(keystore): flashing\n\r");
-  fflush(stdout);
-  for(uint8_t ks_pos=0;ks_pos<EEPROM_SIZE/sizeof(ks);) {
-    anyio_task();
-
-    int16_t bytes_received = anyio_bytes_received();
-    while(bytes_received > 0) {
-      ks[byte_pos++]=fgetc(stdin);
-      bytes_received--;
-      if (byte_pos == sizeof(ks)) {
-        byte_pos=0;
-        eeprom_update_block(&ks,&keystore[ks_pos],sizeof(ks));
-        ks_pos++;
-        fputc('.', stdout);
-        fflush(stdout);
-        led_toggle();
-      }
-    }
-  }
-  printf("\n\r");
-  fputc(0, stdout);
-  led_off();
-}
-
-void keystore_dump_to_stdio(void)
-{
-  keyslot_t ks;
-  for(uint8_t ks_pos=0;ks_pos<EEPROM_SIZE/sizeof(ks);ks_pos++) {
-    eeprom_read_block(&ks,&keystore[ks_pos],sizeof(ks));
-    for (uint8_t i=0; i< sizeof(ks); i++)
-      printf("%02X",ks[i]);
-    printf("\n\r");
-  }
-}
-
-/* this generates a Fletcher8 checksum  */
-/* code from: http://stackoverflow.com/questions/13491700/8-bit-fletcher-checksum-of-16-byte-data */
-uint8_t generate_csum(uint8_t* data)
-{
-  uint16_t sum1 = 0xf, sum2 = 0xf, len = sizeof(keyslot_t) - 1;
-  do { sum2 += ( sum1 += *data++ ); } while (--len);
-  return sum2<<4 | sum1;
-}
-
-uint8_t compare_keyslots(const keyslot_t a, const keyslot_t b)
-{
-  uint8_t tmp=0;
-      // constant time compare
-  for(uint8_t i=0; i<sizeof(keyslot_t); ++i)
-    tmp |= a[i] ^ b[i];
-  return tmp;
-}
-
-uint8_t keystore_check_card(const uint8_t * uid, uint8_t uid_len)
-{
-  keyslot_t card, ks;
-  memset(card, 0, sizeof(card));
-  for (uint8_t pos=0; pos<uid_len; pos++)
-    card[pos]=uid[uid_len-pos-1];
-  card[sizeof(keyslot_t)-1]=generate_csum(card);
-  uint8_t valid=0;
-  for(uint8_t ks_pos=0;ks_pos<(EEPROM_SIZE/sizeof(ks));ks_pos++) {
-    eeprom_read_block(&ks,&keystore[ks_pos],sizeof(ks));
-    if(!compare_keyslots(card, ks)) {
-      valid=1;
-      // break;  // this would break security (not constant time)
-    }
-  }
-  return valid;
-}
-
-- 
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