From 86f4814245998f4b43e136101897557e4c2f5e54 Mon Sep 17 00:00:00 2001 From: dimitri staessens Date: Mon, 20 Feb 2017 14:42:43 +0100 Subject: lib: Revise CACEP Revises CACEP policies to stateless library calls. It provides two policies: an anonymous authentication policy that will generate random credentials for the peer, and a simple authentication policy that will return a name for the peer and an address. Changes the normal IPCP to use the updates API calls. --- src/lib/pol/cacep_anonymous_auth.c | 81 +++++++++++++++++++++ src/lib/pol/cacep_anonymous_auth.h | 33 +++++++++ src/lib/pol/cacep_simple_auth.c | 137 ++++++++++++++++++++++++++++++++++++ src/lib/pol/cacep_simple_auth.h | 33 +++++++++ src/lib/pol/cacep_simple_auth.proto | 29 ++++++++ 5 files changed, 313 insertions(+) create mode 100644 src/lib/pol/cacep_anonymous_auth.c create mode 100644 src/lib/pol/cacep_anonymous_auth.h create mode 100644 src/lib/pol/cacep_simple_auth.c create mode 100644 src/lib/pol/cacep_simple_auth.h create mode 100644 src/lib/pol/cacep_simple_auth.proto (limited to 'src/lib/pol') diff --git a/src/lib/pol/cacep_anonymous_auth.c b/src/lib/pol/cacep_anonymous_auth.c new file mode 100644 index 00000000..d450fdc5 --- /dev/null +++ b/src/lib/pol/cacep_anonymous_auth.c @@ -0,0 +1,81 @@ +/* + * Ouroboros - Copyright (C) 2016 - 2017 + * + * Anonymous policy for CACEP + * + * Dimitri Staessens + * Sander Vrijders + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * version 2.1 as published by the Free Software Foundation. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#include +#include +#include + +#include "cacep_anonymous_auth.h" + +#include +#include +#include +#include + +#define NAME_LEN 8 + +/* this policy generates a hex string */ +static struct cacep_info * anonymous_info(void) +{ + struct cacep_info * info; + struct timespec t; + + info = malloc(sizeof(*info)); + if (info == NULL) + return NULL; + + info->name = malloc(NAME_LEN + 1); + if (info->name == NULL) { + free(info); + return NULL; + } + + clock_gettime(CLOCK_REALTIME, &t); + srand(t.tv_nsec); + + sprintf(info->name, "%8x", + (uint32_t)((rand() % RAND_MAX) & 0xFFFFFFFF)); + + info->addr = 0; + + return info; +} + +struct cacep_info * cacep_anonymous_auth(int fd, + const struct cacep_info * info) +{ + (void) fd; + (void) info; + + return anonymous_info(); +} + + +struct cacep_info * cacep_anonymous_auth_wait(int fd, + const struct cacep_info * info) +{ + (void) fd; + (void) info; + + return anonymous_info(); +} diff --git a/src/lib/pol/cacep_anonymous_auth.h b/src/lib/pol/cacep_anonymous_auth.h new file mode 100644 index 00000000..d0229b05 --- /dev/null +++ b/src/lib/pol/cacep_anonymous_auth.h @@ -0,0 +1,33 @@ +/* + * Ouroboros - Copyright (C) 2016 - 2017 + * + * Anonymous policy for CACEP + * + * Dimitri Staessens + * Sander Vrijders + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * version 2.1 as published by the Free Software Foundation. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#ifndef OUROBOROS_LIB_CACEP_ANONYMOUS_AUTH_H +#define OUROBOROS_LIB_CACEP_ANONYMOUS_AUTH_H + +struct cacep_info * cacep_anonymous_auth(int fd, + const struct cacep_info * info); + +struct cacep_info * cacep_anonymous_auth_wait(int fd, + const struct cacep_info * info); + +#endif /* OUROBOROS_LIB_CACEP_ANONYMOUS_AUTH_H */ diff --git a/src/lib/pol/cacep_simple_auth.c b/src/lib/pol/cacep_simple_auth.c new file mode 100644 index 00000000..1e052f3d --- /dev/null +++ b/src/lib/pol/cacep_simple_auth.c @@ -0,0 +1,137 @@ +/* + * Ouroboros - Copyright (C) 2016 - 2017 + * + * Simple authentication policy for CACEP + * + * Dimitri Staessens + * Sander Vrijders + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * version 2.1 as published by the Free Software Foundation. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#include +#include +#include +#include + +#include "cacep_simple_auth.h" + +#include +#include + +#include "cacep_simple_auth.pb-c.h" +typedef CacepSimpleAuthMsg cacep_simple_auth_msg_t; + +#define BUF_SIZE 2048 + +static struct cacep_info * read_msg(int fd) +{ + struct cacep_info * tmp; + uint8_t buf[BUF_SIZE]; + cacep_simple_auth_msg_t * msg; + ssize_t len; + + len = flow_read(fd, buf, BUF_SIZE); + if (len < 0) + return NULL; + + msg = cacep_simple_auth_msg__unpack(NULL, len, buf); + if (msg == NULL) + return NULL; + + tmp = malloc(sizeof(*tmp)); + if (tmp == NULL) { + cacep_simple_auth_msg__free_unpacked(msg, NULL); + return NULL; + } + + tmp->addr = msg->addr; + tmp->name = strdup(msg->name); + if (tmp->name == NULL) { + free(tmp); + cacep_simple_auth_msg__free_unpacked(msg, NULL); + return NULL; + } + + cacep_simple_auth_msg__free_unpacked(msg, NULL); + + return tmp; +} + +static int send_msg(int fd, + const struct cacep_info * info) +{ + cacep_simple_auth_msg_t msg = CACEP_SIMPLE_AUTH_MSG__INIT; + int ret = 0; + uint8_t * data = NULL; + size_t len = 0; + + msg.name = info->name; + msg.addr = info->addr; + + len = cacep_simple_auth_msg__get_packed_size(&msg); + if (len == 0) + return -1; + + data = malloc(len); + if (data == NULL) + return -ENOMEM; + + cacep_simple_auth_msg__pack(&msg, data); + + if (flow_write(fd, data, len) < 0) + ret = -1; + + free(data); + + return ret; +} + +struct cacep_info * cacep_simple_auth_auth(int fd, + const struct cacep_info * info) +{ + struct cacep_info * tmp; + + assert(info); + + if (send_msg(fd, info)) + return NULL; + + tmp = read_msg(fd); + if (tmp == NULL) + return NULL; + + return tmp; +} + + +struct cacep_info * cacep_simple_auth_auth_wait(int fd, + const struct cacep_info * info) +{ + struct cacep_info * tmp; + + assert(info); + + tmp = read_msg(fd); + if (tmp == NULL) + return NULL; + + if (send_msg(fd, info)) { + free(tmp); + return NULL; + } + + return tmp; +} diff --git a/src/lib/pol/cacep_simple_auth.h b/src/lib/pol/cacep_simple_auth.h new file mode 100644 index 00000000..bbdbe9b9 --- /dev/null +++ b/src/lib/pol/cacep_simple_auth.h @@ -0,0 +1,33 @@ +/* + * Ouroboros - Copyright (C) 2016 - 2017 + * + * Simple authentication policy for CACEP + * + * Dimitri Staessens + * Sander Vrijders + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * version 2.1 as published by the Free Software Foundation. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#ifndef OUROBOROS_LIB_CACEP_SIMPLE_AUTH_H +#define OUROBOROS_LIB_CACEP_SIMPLE_AUTH_H + +struct cacep_info * cacep_simple_auth_auth(int fd, + const struct cacep_info * info); + +struct cacep_info * cacep_simple_auth_auth_wait(int fd, + const struct cacep_info * info); + +#endif /* OUROBOROS_LIB_CACEP_SIMPLE_AUTH_H */ diff --git a/src/lib/pol/cacep_simple_auth.proto b/src/lib/pol/cacep_simple_auth.proto new file mode 100644 index 00000000..d20f8780 --- /dev/null +++ b/src/lib/pol/cacep_simple_auth.proto @@ -0,0 +1,29 @@ +/* + * Ouroboros - Copyright (C) 2016 - 2017 + * + * Message for no authentication CACEP policy + * + * Dimitri Staessens + * Sander Vrijders + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * version 2.1 as published by the Free Software Foundation. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +syntax = "proto2"; + +message cacep_simple_auth_msg { + required string name = 1; + required uint64 addr = 2; +} -- cgit v1.2.3