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authordimitri staessens <dimitri.staessens@ugent.be>2017-02-20 14:42:43 +0100
committerdimitri staessens <dimitri.staessens@ugent.be>2017-02-20 15:23:30 +0100
commit86f4814245998f4b43e136101897557e4c2f5e54 (patch)
tree5a1f3d4aa8640d0e1e182d33923ec27b30cf7f3f /src/lib/pol/cacep_simple_auth.c
parentee47a0c6478ab4e6478ad3b7fe5a35eb5775decb (diff)
downloadouroboros-86f4814245998f4b43e136101897557e4c2f5e54.tar.gz
ouroboros-86f4814245998f4b43e136101897557e4c2f5e54.zip
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.
Diffstat (limited to 'src/lib/pol/cacep_simple_auth.c')
-rw-r--r--src/lib/pol/cacep_simple_auth.c137
1 files changed, 137 insertions, 0 deletions
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 <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/dev.h>
+#include <ouroboros/errno.h>
+
+#include "cacep_simple_auth.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#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;
+}