diff options
Diffstat (limited to 'src/charon/plugins/eap_sim/eap_sim_file.c')
| -rw-r--r-- | src/charon/plugins/eap_sim/eap_sim_file.c | 283 |
1 files changed, 0 insertions, 283 deletions
diff --git a/src/charon/plugins/eap_sim/eap_sim_file.c b/src/charon/plugins/eap_sim/eap_sim_file.c deleted file mode 100644 index 7040a5ace..000000000 --- a/src/charon/plugins/eap_sim/eap_sim_file.c +++ /dev/null @@ -1,283 +0,0 @@ -/*
- * Copyright (C) 2007 Martin Willi
- * Hochschule fuer Technik Rapperswil
- *
- * 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 the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
- *
- * This program 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. - * - * $Id$ - */
-
-#include <string.h>
-#include <stdio.h>
-#include <errno.h>
-
-#include <daemon.h>
-
-#define IMSI_LEN 64
-#define RAND_LEN 16
-#define SRES_LEN 4
-#define KC_LEN 8
-
-typedef struct triplet_t triplet_t;
-
-struct triplet_t {
- unsigned char imsi[IMSI_LEN];
- unsigned char rand[RAND_LEN];
- unsigned char sres[SRES_LEN];
- unsigned char kc[KC_LEN];
-};
-
-static triplet_t *triplets = NULL;
-static int triplet_count = 0;
-
-#define TRIPLET_FILE IPSEC_CONFDIR "/ipsec.d/triplets.dat"
-
-/**
- * convert a single HEX char to its integer value
- */
-static int hexchr(char chr)
-{
- switch (chr)
- {
- case '0'...'9':
- return chr - '0';
- case 'A'...'F':
- return 10 + chr - 'A';
- case 'a'...'f':
- return 10 + chr - 'a';
- }
- return 0;
-}
-
-/**
- * convert a HEX string into a char array bin, limited by array length len
- */
-static void hex2bin(char *hex, unsigned char *bin, size_t len)
-{
- char *pos;
- int i, even = 1;
-
- pos = hex - 1;
- /* find the end, as we convert bottom up */
- while (TRUE)
- {
- switch (*(pos+1))
- {
- case '0'...'9':
- case 'A'...'F':
- case 'a'...'f':
- pos++;
- continue;
- }
- break;
- }
- /* convert two hex chars into a single bin byte */
- for (i = 0; pos >= hex && i < len; pos--)
- {
- if (even)
- {
- bin[len - 1 - i] = hexchr(*pos);
- }
- else
- {
- bin[len - 1 - i] |= 16 * hexchr(*pos);
- i++;
- }
- even = !even;
- }
-}
-
-/**
- * free up allocated triplets
- */
-static void __attribute__ ((destructor)) free_triplets()
-{
- free(triplets);
-}
-
-/**
- * read the triplets from the file, using freeradius triplet file syntax:
- * http://www.freeradius.org/radiusd/doc/rlm_sim_triplets
- */
-static void __attribute__ ((constructor)) read_triplets()
-{
- char line[512], *data[4], *pos;
- FILE *file;
- int i, nr = 0;
- triplet_t *triplet;
-
- file = fopen(TRIPLET_FILE, "r");
- if (file == NULL)
- {
- DBG1(DBG_CFG, "opening triplet file %s failed: %s",
- TRIPLET_FILE, strerror(errno));
- return;
- }
-
- if (triplets)
- {
- free(triplets);
- triplets = NULL;
- triplet_count = 0;
- }
-
- /* read line by line */
- while (fgets(line, sizeof(line), file))
- {
- nr++;
- /* skip comments, empty lines */
- switch (line[0])
- {
- case '\n':
- case '\r':
- case '#':
- case '\0':
- continue;
- default:
- break;
- }
- /* read comma separated values */
- pos = line;
- for (i = 0; i < 4; i++)
- {
- data[i] = pos;
- pos = strchr(pos, ',');
- if (pos)
- {
- *pos = '\0';
- pos++;
- }
- else if (i != 3)
- {
- DBG1(DBG_CFG, "error in triplet file, line %d", nr);
- fclose(file);
- return;
- }
- }
- /* allocate new triplet */
- triplet_count++;
- triplets = realloc(triplets, triplet_count * sizeof(triplet_t));
- triplet = &triplets[triplet_count - 1];
- memset(triplet, 0, sizeof(triplet_t));
-
- /* convert/copy triplet data */
- for (i = 0; i < IMSI_LEN - 1; i++)
- {
- switch (data[0][i])
- {
- case '\n':
- case '\r':
- case '\0':
- break;
- default:
- triplet->imsi[i] = data[0][i];
- continue;
- }
- break;
- }
- hex2bin(data[1], triplet->rand, RAND_LEN);
- hex2bin(data[2], triplet->sres, SRES_LEN);
- hex2bin(data[3], triplet->kc, KC_LEN);
-
- DBG4(DBG_CFG, "triplet: imsi %b\nrand %b\nsres %b\nkc %b",
- triplet->imsi, IMSI_LEN, triplet->rand, RAND_LEN,
- triplet->sres, SRES_LEN, triplet->kc, KC_LEN);
- }
- fclose(file);
- DBG2(DBG_CFG, "read %d triplets from %s", triplet_count, TRIPLET_FILE);
-}
-
-/**
- * Run the sim algorithm, see eap_sim.h
- */
-int sim_run_alg(const unsigned char *rand, int rand_length,
- unsigned char *sres, int *sres_length,
- unsigned char *kc, int *kc_length)
-{
- int current;
-
- if (rand_length != RAND_LEN ||
- *sres_length < SRES_LEN ||
- *kc_length < KC_LEN)
- {
- return 1;
- }
-
- for (current = 0; current < triplet_count; current++)
- {
- if (memcmp(triplets[current].rand, rand, RAND_LEN) == 0)
- {
- memcpy(sres, triplets[current].sres, SRES_LEN);
- memcpy(kc, triplets[current].kc, KC_LEN);
- *sres_length = SRES_LEN;
- *kc_length = KC_LEN;
- return 0;
- }
- }
- return 2;
-}
-
-/**
- * Get a single triplet, see_eap_sim.h
- */
-int sim_get_triplet(char *imsi,
- unsigned char *rand, int *rand_length,
- unsigned char *sres, int *sres_length,
- unsigned char *kc, int *kc_length)
-{
- int current;
- triplet_t *triplet;
- static int skip = -1;
-
- DBG2(DBG_CFG, "getting triplet for %s", imsi);
-
- if (*rand_length < RAND_LEN ||
- *sres_length < SRES_LEN ||
- *kc_length < KC_LEN)
- {
- return 1;
- }
- if (triplet_count == 0)
- {
- return 2;
- }
- for (current = 0; current < triplet_count; current++)
- {
- triplet = &triplets[current];
-
- if (streq(imsi, triplet->imsi))
- {
- /* skip triplet if already used */
- if (skip >= current)
- {
- continue;
- }
- *rand_length = RAND_LEN;
- *sres_length = SRES_LEN;
- *kc_length = KC_LEN;
- memcpy(rand, triplet->rand, RAND_LEN);
- memcpy(sres, triplet->sres, SRES_LEN);
- memcpy(kc, triplet->kc, KC_LEN);
- /* remember used triplet */
- skip = current;
- return 0;
- }
- }
- if (skip > -1)
- {
- /* no triplet left, reuse triplets */
- skip = -1;
- return sim_get_triplet(imsi, rand, rand_length,
- sres, sres_length, kc, kc_length);
- }
- return 2;
-}
-
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