summaryrefslogtreecommitdiff
path: root/src/libcharon/encoding/payloads/nonce_payload.c
diff options
context:
space:
mode:
authorRene Mayrhofer <rene@mayrhofer.eu.org>2010-05-25 19:01:36 +0000
committerRene Mayrhofer <rene@mayrhofer.eu.org>2010-05-25 19:01:36 +0000
commit1ac70afcc1f7d6d2738a34308810719b0976d29f (patch)
tree805f6ce2a15d1a717781d7cbceac8408a74b6b0c /src/libcharon/encoding/payloads/nonce_payload.c
parented7d79f96177044949744da10f4431c1d6242241 (diff)
downloadvyos-strongswan-1ac70afcc1f7d6d2738a34308810719b0976d29f.tar.gz
vyos-strongswan-1ac70afcc1f7d6d2738a34308810719b0976d29f.zip
[svn-upgrade] Integrating new upstream version, strongswan (4.4.0)
Diffstat (limited to 'src/libcharon/encoding/payloads/nonce_payload.c')
-rw-r--r--src/libcharon/encoding/payloads/nonce_payload.c225
1 files changed, 225 insertions, 0 deletions
diff --git a/src/libcharon/encoding/payloads/nonce_payload.c b/src/libcharon/encoding/payloads/nonce_payload.c
new file mode 100644
index 000000000..4ad5ce9dd
--- /dev/null
+++ b/src/libcharon/encoding/payloads/nonce_payload.c
@@ -0,0 +1,225 @@
+/*
+ * Copyright (C) 2005-2006 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * 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.
+ */
+
+/* offsetof macro */
+#include <stddef.h>
+
+#include "nonce_payload.h"
+
+#include <encoding/payloads/encodings.h>
+
+
+typedef struct private_nonce_payload_t private_nonce_payload_t;
+
+/**
+ * Private data of an nonce_payload_t object.
+ *
+ */
+struct private_nonce_payload_t {
+ /**
+ * Public nonce_payload_t interface.
+ */
+ nonce_payload_t public;
+
+ /**
+ * Next payload type.
+ */
+ u_int8_t next_payload;
+
+ /**
+ * Critical flag.
+ */
+ bool critical;
+
+ /**
+ * Length of this payload.
+ */
+ u_int16_t payload_length;
+
+ /**
+ * The contained nonce value.
+ */
+ chunk_t nonce;
+};
+
+/**
+ * Encoding rules to parse or generate a nonce payload
+ *
+ * The defined offsets are the positions in a object of type
+ * private_nonce_payload_t.
+ *
+ */
+encoding_rule_t nonce_payload_encodings[] = {
+ /* 1 Byte next payload type, stored in the field next_payload */
+ { U_INT_8, offsetof(private_nonce_payload_t, next_payload) },
+ /* the critical bit */
+ { FLAG, offsetof(private_nonce_payload_t, critical) },
+ /* 7 Bit reserved bits, nowhere stored */
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ /* Length of the whole nonce payload*/
+ { PAYLOAD_LENGTH, offsetof(private_nonce_payload_t, payload_length) },
+ /* some nonce bytes, lenth is defined in PAYLOAD_LENGTH */
+ { NONCE_DATA, offsetof(private_nonce_payload_t, nonce) }
+};
+
+/* 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! Next Payload !C! RESERVED ! Payload Length !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! !
+ ~ Nonce Data ~
+ ! !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+/**
+ * Implementation of payload_t.verify.
+ */
+static status_t verify(private_nonce_payload_t *this)
+{
+ if ((this->nonce.len < 16) || ((this->nonce.len > 256)))
+ {
+ /* nonce length is wrong */
+ return FAILED;
+ }
+
+ return SUCCESS;
+}
+
+/**
+ * Implementation of nonce_payload_t.set_nonce.
+ */
+static status_t set_nonce(private_nonce_payload_t *this, chunk_t nonce)
+{
+ this->nonce.ptr = clalloc(nonce.ptr, nonce.len);
+ this->nonce.len = nonce.len;
+ this->payload_length = NONCE_PAYLOAD_HEADER_LENGTH + nonce.len;
+ return SUCCESS;
+}
+
+/**
+ * Implementation of nonce_payload_t.get_nonce.
+ */
+static chunk_t get_nonce(private_nonce_payload_t *this)
+{
+ chunk_t nonce;
+ nonce.ptr = clalloc(this->nonce.ptr,this->nonce.len);
+ nonce.len = this->nonce.len;
+ return nonce;
+}
+
+/**
+ * Implementation of nonce_payload_t.get_encoding_rules.
+ */
+static void get_encoding_rules(private_nonce_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
+{
+ *rules = nonce_payload_encodings;
+ *rule_count = sizeof(nonce_payload_encodings) / sizeof(encoding_rule_t);
+}
+
+/**
+ * Implementation of payload_t.get_type.
+ */
+static payload_type_t get_type(private_nonce_payload_t *this)
+{
+ return NONCE;
+}
+
+/**
+ * Implementation of payload_t.get_next_type.
+ */
+static payload_type_t get_next_type(private_nonce_payload_t *this)
+{
+ return (this->next_payload);
+}
+
+/**
+ * Implementation of payload_t.set_next_type.
+ */
+static void set_next_type(private_nonce_payload_t *this,payload_type_t type)
+{
+ this->next_payload = type;
+}
+
+/**
+ * recompute the length of the payload.
+ */
+static void compute_length(private_nonce_payload_t *this)
+{
+ this->payload_length = NONCE_PAYLOAD_HEADER_LENGTH + this->nonce.len;
+}
+
+/**
+ * Implementation of payload_t.get_length.
+ */
+static size_t get_length(private_nonce_payload_t *this)
+{
+ compute_length(this);
+ return this->payload_length;
+}
+
+/**
+ * Implementation of payload_t.destroy and nonce_payload_t.destroy.
+ */
+static void destroy(private_nonce_payload_t *this)
+{
+ if (this->nonce.ptr != NULL)
+ {
+ free(this->nonce.ptr);
+ }
+
+ free(this);
+}
+
+/*
+ * Described in header
+ */
+nonce_payload_t *nonce_payload_create()
+{
+ private_nonce_payload_t *this = malloc_thing(private_nonce_payload_t);
+
+ /* interface functions */
+ this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
+ this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules;
+ this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length;
+ this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type;
+ this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type;
+ this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_type;
+ this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
+
+ /* public functions */
+ this->public.destroy = (void (*) (nonce_payload_t *)) destroy;
+ this->public.set_nonce = (void (*) (nonce_payload_t *,chunk_t)) set_nonce;
+ this->public.get_nonce = (chunk_t (*) (nonce_payload_t *)) get_nonce;
+
+ /* private variables */
+ this->critical = FALSE;
+ this->next_payload = NO_PAYLOAD;
+ this->payload_length = NONCE_PAYLOAD_HEADER_LENGTH;
+ this->nonce.ptr = NULL;
+ this->nonce.len = 0;
+
+ return (&(this->public));
+}
+
+