summaryrefslogtreecommitdiff
path: root/src/lib/pol/cacep_anonymous_auth.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/lib/pol/cacep_anonymous_auth.c')
-rw-r--r--src/lib/pol/cacep_anonymous_auth.c205
1 files changed, 205 insertions, 0 deletions
diff --git a/src/lib/pol/cacep_anonymous_auth.c b/src/lib/pol/cacep_anonymous_auth.c
new file mode 100644
index 00000000..1fcc730a
--- /dev/null
+++ b/src/lib/pol/cacep_anonymous_auth.c
@@ -0,0 +1,205 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Anonymous policy for CACEP
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * 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 <ouroboros/config.h>
+#include <ouroboros/cacep.h>
+#include <ouroboros/time_utils.h>
+#include <ouroboros/dev.h>
+#include <ouroboros/errno.h>
+
+#include "cacep_proto.h"
+#include "cacep_anonymous_auth.h"
+
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "cacep_anonymous_auth.pb-c.h"
+typedef CacepAnonymousAuthMsg cacep_anonymous_auth_msg_t;
+typedef CacepProtoMsg cacep_proto_msg_t;
+
+#define BUF_SIZE 2048
+#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;
+
+ cacep_info_init(info);
+
+ 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;
+}
+
+static struct cacep_info * read_msg(int fd)
+{
+ struct cacep_info * tmp;
+ uint8_t buf[BUF_SIZE];
+ cacep_anonymous_auth_msg_t * msg;
+ ssize_t len;
+
+ len = flow_read(fd, buf, BUF_SIZE);
+ if (len < 0)
+ return NULL;
+
+ msg = cacep_anonymous_auth_msg__unpack(NULL, len, buf);
+ if (msg == NULL)
+ return NULL;
+
+ tmp = anonymous_info();
+ if (tmp == NULL) {
+ cacep_anonymous_auth_msg__free_unpacked(msg, NULL);
+ return NULL;
+ }
+
+ tmp->proto.protocol = strdup(msg->proto->protocol);
+ if (tmp->proto.protocol == NULL) {
+ free(tmp);
+ cacep_anonymous_auth_msg__free_unpacked(msg, NULL);
+ return NULL;
+ }
+
+ tmp->proto.pref_version = msg->proto->pref_version;
+ tmp->proto.pref_syntax = code_to_syntax(msg->proto->pref_syntax);
+ if (tmp->proto.pref_syntax < 0) {
+ free(tmp->proto.protocol);
+ free(tmp);
+ cacep_anonymous_auth_msg__free_unpacked(msg, NULL);
+ return NULL;
+ }
+
+ cacep_anonymous_auth_msg__free_unpacked(msg, NULL);
+
+ return tmp;
+}
+
+static int send_msg(int fd,
+ const struct cacep_info * info)
+{
+ cacep_anonymous_auth_msg_t msg = CACEP_ANONYMOUS_AUTH_MSG__INIT;
+ cacep_proto_msg_t cmsg = CACEP_PROTO_MSG__INIT;
+ int ret = 0;
+ uint8_t * data = NULL;
+ size_t len = 0;
+
+ cmsg.protocol = info->proto.protocol;
+ cmsg.pref_version = info->proto.pref_version;
+ cmsg.pref_syntax = syntax_to_code(info->proto.pref_syntax);
+ if (cmsg.pref_syntax < 0)
+ return -1;
+
+ msg.proto = &cmsg;
+
+ len = cacep_anonymous_auth_msg__get_packed_size(&msg);
+ if (len == 0)
+ return -1;
+
+ data = malloc(len);
+ if (data == NULL)
+ return -ENOMEM;
+
+ cacep_anonymous_auth_msg__pack(&msg, data);
+
+ if (flow_write(fd, data, len) < 0)
+ ret = -1;
+
+ free(data);
+
+ return ret;
+}
+
+struct cacep_info * cacep_anonymous_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;
+
+ if (strcmp(info->proto.protocol, tmp->proto.protocol) ||
+ info->proto.pref_version != tmp->proto.pref_version ||
+ info->proto.pref_syntax != tmp->proto.pref_syntax) {
+ cacep_info_fini(tmp);
+ free(tmp);
+ return NULL;
+ }
+
+ tmp->data = NULL;
+
+ return tmp;
+}
+
+
+struct cacep_info * cacep_anonymous_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)) {
+ cacep_info_fini(tmp);
+ free(tmp);
+ return NULL;
+ }
+
+ if (strcmp(info->proto.protocol, tmp->proto.protocol) ||
+ info->proto.pref_version != tmp->proto.pref_version ||
+ info->proto.pref_syntax != tmp->proto.pref_syntax) {
+ cacep_info_fini(tmp);
+ free(tmp);
+ return NULL;
+ }
+
+ return tmp;
+}