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Diffstat (limited to 'src/libcharon/encoding/payloads/auth_payload.c')
-rw-r--r--src/libcharon/encoding/payloads/auth_payload.c259
1 files changed, 259 insertions, 0 deletions
diff --git a/src/libcharon/encoding/payloads/auth_payload.c b/src/libcharon/encoding/payloads/auth_payload.c
new file mode 100644
index 000000000..d31208abb
--- /dev/null
+++ b/src/libcharon/encoding/payloads/auth_payload.c
@@ -0,0 +1,259 @@
+/*
+ * 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.
+ */
+
+#include "auth_payload.h"
+
+#include <encoding/payloads/encodings.h>
+
+
+typedef struct private_auth_payload_t private_auth_payload_t;
+
+/**
+ * Private data of an auth_payload_t object.
+ *
+ */
+struct private_auth_payload_t {
+
+ /**
+ * Public auth_payload_t interface.
+ */
+ auth_payload_t public;
+
+ /**
+ * Next payload type.
+ */
+ u_int8_t next_payload;
+
+ /**
+ * Critical flag.
+ */
+ bool critical;
+
+ /**
+ * Length of this payload.
+ */
+ u_int16_t payload_length;
+
+ /**
+ * Method of the AUTH Data.
+ */
+ u_int8_t auth_method;
+
+ /**
+ * The contained auth data value.
+ */
+ chunk_t auth_data;
+};
+
+/**
+ * Encoding rules to parse or generate a AUTH payload
+ *
+ * The defined offsets are the positions in a object of type
+ * private_auth_payload_t.
+ */
+encoding_rule_t auth_payload_encodings[] = {
+ /* 1 Byte next payload type, stored in the field next_payload */
+ { U_INT_8, offsetof(private_auth_payload_t, next_payload) },
+ /* the critical bit */
+ { FLAG, offsetof(private_auth_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 payload*/
+ { PAYLOAD_LENGTH, offsetof(private_auth_payload_t, payload_length)},
+ /* 1 Byte AUTH type*/
+ { U_INT_8, offsetof(private_auth_payload_t, auth_method) },
+ /* 3 reserved bytes */
+ { RESERVED_BYTE, 0 },
+ { RESERVED_BYTE, 0 },
+ { RESERVED_BYTE, 0 },
+ /* some auth data bytes, length is defined in PAYLOAD_LENGTH */
+ { AUTH_DATA, offsetof(private_auth_payload_t, auth_data) }
+};
+
+/*
+ 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 !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! Auth Method ! RESERVED !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! !
+ ~ Authentication Data ~
+ ! !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+/**
+ * Implementation of payload_t.verify.
+ */
+static status_t verify(private_auth_payload_t *this)
+{
+ if (this->auth_method == 0 ||
+ (this->auth_method >= 4 && this->auth_method <= 8) ||
+ (this->auth_method >= 12 && this->auth_method <= 200))
+ {
+ /* reserved IDs */
+ return FAILED;
+ }
+ return SUCCESS;
+}
+
+/**
+ * Implementation of auth_payload_t.get_encoding_rules.
+ */
+static void get_encoding_rules(private_auth_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
+{
+ *rules = auth_payload_encodings;
+ *rule_count = sizeof(auth_payload_encodings) / sizeof(encoding_rule_t);
+}
+
+/**
+ * Implementation of payload_t.get_type.
+ */
+static payload_type_t get_payload_type(private_auth_payload_t *this)
+{
+ return AUTHENTICATION;
+}
+
+/**
+ * Implementation of payload_t.get_next_type.
+ */
+static payload_type_t get_next_type(private_auth_payload_t *this)
+{
+ return (this->next_payload);
+}
+
+/**
+ * Implementation of payload_t.set_next_type.
+ */
+static void set_next_type(private_auth_payload_t *this,payload_type_t type)
+{
+ this->next_payload = type;
+}
+
+/**
+ * Implementation of payload_t.get_length.
+ */
+static size_t get_length(private_auth_payload_t *this)
+{
+ return this->payload_length;
+}
+
+/**
+ * Implementation of auth_payload_t.set_auth_method.
+ */
+static void set_auth_method (private_auth_payload_t *this, auth_method_t method)
+{
+ this->auth_method = method;
+}
+
+/**
+ * Implementation of auth_payload_t.get_auth_method.
+ */
+static auth_method_t get_auth_method (private_auth_payload_t *this)
+{
+ return (this->auth_method);
+}
+
+/**
+ * Implementation of auth_payload_t.set_data.
+ */
+static void set_data (private_auth_payload_t *this, chunk_t data)
+{
+ if (this->auth_data.ptr != NULL)
+ {
+ chunk_free(&(this->auth_data));
+ }
+ this->auth_data.ptr = clalloc(data.ptr,data.len);
+ this->auth_data.len = data.len;
+ this->payload_length = AUTH_PAYLOAD_HEADER_LENGTH + this->auth_data.len;
+}
+
+/**
+ * Implementation of auth_payload_t.get_data.
+ */
+static chunk_t get_data (private_auth_payload_t *this)
+{
+ return (this->auth_data);
+}
+
+/**
+ * Implementation of auth_payload_t.get_data_clone.
+ */
+static chunk_t get_data_clone (private_auth_payload_t *this)
+{
+ chunk_t cloned_data;
+ if (this->auth_data.ptr == NULL)
+ {
+ return (this->auth_data);
+ }
+ cloned_data.ptr = clalloc(this->auth_data.ptr,this->auth_data.len);
+ cloned_data.len = this->auth_data.len;
+ return cloned_data;
+}
+
+/**
+ * Implementation of payload_t.destroy and auth_payload_t.destroy.
+ */
+static void destroy(private_auth_payload_t *this)
+{
+ if (this->auth_data.ptr != NULL)
+ {
+ chunk_free(&(this->auth_data));
+ }
+
+ free(this);
+}
+
+/*
+ * Described in header
+ */
+auth_payload_t *auth_payload_create()
+{
+ private_auth_payload_t *this = malloc_thing(private_auth_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_payload_type;
+ this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
+
+ /* public functions */
+ this->public.destroy = (void (*) (auth_payload_t *)) destroy;
+ this->public.set_auth_method = (void (*) (auth_payload_t *,auth_method_t)) set_auth_method;
+ this->public.get_auth_method = (auth_method_t (*) (auth_payload_t *)) get_auth_method;
+ this->public.set_data = (void (*) (auth_payload_t *,chunk_t)) set_data;
+ this->public.get_data_clone = (chunk_t (*) (auth_payload_t *)) get_data_clone;
+ this->public.get_data = (chunk_t (*) (auth_payload_t *)) get_data;
+
+ /* private variables */
+ this->critical = FALSE;
+ this->next_payload = NO_PAYLOAD;
+ this->payload_length =AUTH_PAYLOAD_HEADER_LENGTH;
+ this->auth_data = chunk_empty;
+
+ return (&(this->public));
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-22 10:23:31 +0000