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example: add generic PP authentication helper 

Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Patrick McHardy 2010-07-28 05:07:33 +02:00
parent 9e6a9bba93
commit 10d50440b5
4 changed files with 99 additions and 8 deletions
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1
example/Makefile.in
View File

@ -5,6 +5,7 @@ PROGRAMS += cc ss mm-fp mm-pp pp-access-rights discover hijack
destdir := usr/share/dect/examples
common-obj += common.o event_ops.o keys.o dummy_ops.o debug.o
pp-common-obj += $(common-obj) pp-auth.o
cc-destdir := $(destdir)
cc-obj += $(common-obj)

7
example/common.h
View File

@ -22,6 +22,13 @@ extern int dect_write_uak(const struct dect_ipui *ipui,
extern int dect_read_uak(const struct dect_ipui *ipui,
uint8_t uak[DECT_AUTH_KEY_LEN]);
extern void dect_pp_auth_init(struct dect_ops *ops,
const struct dect_ipui *ipui);
struct mm_auth_priv {
uint8_t dck[DECT_CIPHER_KEY_LEN];
};
extern void pexit(const char *str);
#include "../src/ccitt-adpcm/g72x.h"

26
example/keys.c
View File

@ -38,28 +38,38 @@ int dect_write_uak(const struct dect_ipui *ipui,
int dect_read_uak(const struct dect_ipui *ipui, uint8_t _uak[DECT_AUTH_KEY_LEN])
{
struct dect_ipui ripui;
uint8_t uak[16];
uint8_t uak[DECT_AUTH_KEY_LEN];
unsigned int i;
FILE *f;
f = dect_keyfile_open("r");
if (f == NULL)
return -1;
goto err;
if (fscanf(f, "N|%04hx|%05x|", &ripui.pun.n.ipei.emc, &ripui.pun.n.ipei.psn) != 2)
return -1;
memset(&ripui, 0, sizeof(ripui));
ripui.put = DECT_IPUI_N;
if (fscanf(f, "N|%04hx|%05x|",
&ripui.pun.n.ipei.emc,
&ripui.pun.n.ipei.psn) != 2)
goto err;
for (i = 0; i < DECT_AUTH_KEY_LEN; i++) {
if (fscanf(f, "%02hhx", &uak[i]) != 1)
return -1;
goto err;
}
if (ipui->pun.n.ipei.emc != ripui.pun.n.ipei.emc ||
ipui->pun.n.ipei.psn != ripui.pun.n.ipei.psn)
return -1;
if (dect_ipui_cmp(ipui, &ripui))
goto err;
memcpy(_uak, uak, DECT_AUTH_KEY_LEN);
fclose(f);
return 0;
err:
fprintf(stderr, "Could not find UAK for IPUI N %4x %5x, use "
"'pp-access-rights' to allocate a new one\n",
ipui->pun.n.ipei.emc, ipui->pun.n.ipei.psn);
return -1;
}

73
example/pp-auth.c Normal file
View File

@ -0,0 +1,73 @@
/*
* DECT PP authentication helpers
*
* Copyright (c) 2010 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <stdio.h>
#include <stdlib.h>
#include <dect/libdect.h>
#include <dect/auth.h>
#include "common.h"
static const struct dect_ipui *auth_ipui;
static void dect_mm_cipher_ind(struct dect_handle *dh,
struct dect_mm_endpoint *mme,
struct dect_mm_cipher_param *param)
{
struct mm_auth_priv *priv = dect_mm_priv(mme);
struct dect_mm_cipher_param reply = {
.cipher_info = param->cipher_info,
};
dect_mm_cipher_res(dh, mme, true, &reply, priv->dck);
}
static void dect_mm_authenticate_ind(struct dect_handle *dh,
struct dect_mm_endpoint *mme,
struct dect_mm_authenticate_param *param)
{
struct mm_auth_priv *priv = dect_mm_priv(mme);
struct dect_ie_auth_res res1;
struct dect_mm_authenticate_param reply = {
.res = &res1,
};
uint8_t uak[DECT_AUTH_KEY_LEN];
uint8_t k[DECT_AUTH_KEY_LEN], ks[DECT_AUTH_KEY_LEN];
bool accept = false;
if (dect_read_uak(auth_ipui, uak) < 0)
goto out;
dect_auth_b1(uak, sizeof(uak), k);
dect_auth_a11(k, param->rs->value, ks);
dect_auth_a12(ks, param->rand->value, priv->dck, &res1.value);
accept = true;
out:
dect_mm_authenticate_res(dh, mme, accept, &reply);
}
static struct dect_mm_ops dect_mm_ops;
void dect_pp_auth_init(struct dect_ops *ops, const struct dect_ipui *ipui)
{
struct dect_mm_ops *mm_ops;
if (!ops->mm_ops)
ops->mm_ops = &dect_mm_ops;
mm_ops = (struct dect_mm_ops *)ops->mm_ops;
if (!mm_ops->priv_size)
mm_ops->priv_size = sizeof(struct mm_auth_priv);
mm_ops->mm_authenticate_ind = dect_mm_authenticate_ind;
mm_ops->mm_cipher_ind = dect_mm_cipher_ind;
auth_ipui = ipui;
}