[svn-upgrade] Integrating new upstream version, strongswan (4.1.1)

1 files changed, 331 insertions, 0 deletions

diff --git a/src/charon/encoding/payloads/eap_payload.c b/src/charon/encoding/payloads/eap_payload.c
new file mode 100644
index 000000000..79ab32fe5
--- /dev/null
+++ b/src/charon/encoding/payloads/eap_payload.c
@@ -0,0 +1,331 @@
+/**
+ * @file eap_payload.c
+ * 
+ * @brief Implementation of eap_payload_t.
+ * 
+ */
+
+/*
+ * 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 <stddef.h>
+
+#include "eap_payload.h"
+
+#include <daemon.h>
+
+typedef struct private_eap_payload_t private_eap_payload_t;
+
+/**
+ * Private data of an eap_payload_t object.
+ * 
+ */
+struct private_eap_payload_t {
+	/**
+	 * Public eap_payload_t interface.
+	 */
+	eap_payload_t public;
+	
+	/**
+	 * Next payload type.
+	 */
+	u_int8_t  next_payload;
+
+	/**
+	 * Critical flag.
+	 */
+	bool critical;
+	
+	/**
+	 * Length of this payload.
+	 */
+	u_int16_t payload_length;
+	
+	/**
+	 * EAP message data, if available
+	 */
+	chunk_t data;
+};
+
+/**
+ * Encoding rules to parse or generate a EAP payload.
+ * 
+ * The defined offsets are the positions in a object of type 
+ * private_eap_payload_t.
+ * 
+ */
+encoding_rule_t eap_payload_encodings[] = {
+ 	/* 1 Byte next payload type, stored in the field next_payload */
+	{ U_INT_8,			offsetof(private_eap_payload_t, next_payload) 	},
+	/* the critical bit */
+	{ FLAG,				offsetof(private_eap_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_eap_payload_t, payload_length)	},
+	/* chunt to data, starting at "code" */
+	{ EAP_DATA,			offsetof(private_eap_payload_t, 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        !
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       !     Code      ! Identifier    !           Length              !
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       !     Type      ! Type_Data...
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
+*/
+
+/**
+ * Implementation of payload_t.verify.
+ */
+static status_t verify(private_eap_payload_t *this)
+{
+	u_int16_t length;
+	u_int8_t code;
+	
+	if (this->data.len < 4)
+	{
+		DBG1(DBG_ENC, "EAP payloads EAP message too short (%d)", this->data.len);
+		return FAILED;
+	}
+	code = *this->data.ptr;
+	length = htons(*(u_int16_t*)(this->data.ptr + 2));
+	if (this->data.len != length)
+	{
+		DBG1(DBG_ENC, "EAP payload length (%d) does not match contained message length (%d)",
+			 this->data.len, length);
+		return FAILED;
+	}
+	switch (code)
+	{
+		case EAP_REQUEST:
+		case EAP_RESPONSE:
+		{
+			if (this->data.len < 4)
+			{
+				DBG1(DBG_ENC, "EAP Request/Response does not have any data");
+				return FAILED;
+			}
+			break;
+		}
+		case EAP_SUCCESS:
+		case EAP_FAILURE:
+		{
+			if (this->data.len != 4)
+			{
+				DBG1(DBG_ENC, "EAP Success/Failure has data");
+				return FAILED;
+			}
+			break;
+		}
+		default:
+			return FAILED;
+	}
+	return SUCCESS;
+}
+
+/**
+ * Implementation of eap_payload_t.get_encoding_rules.
+ */
+static void get_encoding_rules(private_eap_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
+{
+	*rules = eap_payload_encodings;
+	*rule_count = sizeof(eap_payload_encodings) / sizeof(encoding_rule_t);
+}
+
+/**
+ * Implementation of payload_t.get_type.
+ */
+static payload_type_t get_payload_type(private_eap_payload_t *this)
+{
+	return EXTENSIBLE_AUTHENTICATION;
+}
+
+/**
+ * Implementation of payload_t.get_next_type.
+ */
+static payload_type_t get_next_type(private_eap_payload_t *this)
+{
+	return (this->next_payload);
+}
+
+/**
+ * Implementation of payload_t.set_next_type.
+ */
+static void set_next_type(private_eap_payload_t *this,payload_type_t type)
+{
+	this->next_payload = type;
+}
+
+/**
+ * Implementation of payload_t.get_length.
+ */
+static size_t get_length(private_eap_payload_t *this)
+{
+	return this->payload_length;
+}
+
+/**
+ * Implementation of eap_payload_t.get_data.
+ */
+static chunk_t get_data(private_eap_payload_t *this)
+{
+	return this->data;
+}
+
+/**
+ * Implementation of eap_payload_t.set_data.
+ */
+static void set_data(private_eap_payload_t *this, chunk_t data)
+{
+	chunk_free(&this->data);
+	this->data = chunk_clone(data);
+	this->payload_length = this->data.len + 4;
+}
+
+/**
+ * Implementation of eap_payload_t.get_code.
+ */
+static eap_code_t get_code(private_eap_payload_t *this)
+{
+	if (this->data.len > 0)
+	{
+		return *this->data.ptr;
+	}
+	/* should not happen, as it is verified */
+	return 0;
+}
+
+/**
+ * Implementation of eap_payload_t.get_identifier.
+ */
+static u_int8_t get_identifier(private_eap_payload_t *this)
+{
+	if (this->data.len > 1)
+	{
+		return *(this->data.ptr + 1);
+	}
+	/* should not happen, as it is verified */
+	return 0;
+}
+
+/**
+ * Implementation of eap_payload_t.get_type.
+ */
+static eap_type_t get_type(private_eap_payload_t *this)
+{
+	if (this->data.len > 4)
+	{
+		return *(this->data.ptr + 4);
+	}
+	return 0;
+}
+
+/**
+ * Implementation of payload_t.destroy and eap_payload_t.destroy.
+ */
+static void destroy(private_eap_payload_t *this)
+{
+	chunk_free(&this->data);
+	free(this);
+}
+
+/*
+ * Described in header
+ */
+eap_payload_t *eap_payload_create()
+{
+	private_eap_payload_t *this = malloc_thing(private_eap_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 (*) (eap_payload_t *)) destroy;
+	this->public.get_data = (chunk_t (*) (eap_payload_t*))get_data;
+	this->public.set_data = (void (*) (eap_payload_t *,chunk_t))set_data;
+	this->public.get_code = (eap_code_t (*) (eap_payload_t*))get_code;
+	this->public.get_identifier = (u_int8_t (*) (eap_payload_t*))get_identifier;
+	this->public.get_type = (eap_type_t (*) (eap_payload_t*))get_type;
+	
+	/* private variables */
+	this->critical = FALSE;
+	this->next_payload = NO_PAYLOAD;
+	this->payload_length = EAP_PAYLOAD_HEADER_LENGTH;
+	this->data = chunk_empty;
+	
+	return &(this->public);
+}
+
+/*
+ * Described in header
+ */
+eap_payload_t *eap_payload_create_data(chunk_t data)
+{
+	eap_payload_t *this = eap_payload_create();
+	
+	this->set_data(this, data);
+	return this;
+}
+
+/*
+ * Described in header
+ */
+eap_payload_t *eap_payload_create_code(eap_code_t code)
+{
+	eap_payload_t *this = eap_payload_create();
+	chunk_t data = chunk_alloca(4);
+	
+	*(data.ptr + 0) = code;
+	*(data.ptr + 1) = 0;
+	*(u_int16_t*)(data.ptr + 2) = htons(data.len);
+	
+	this->set_data(this, data);
+	return this;
+}
+
+/*
+ * Described in header
+ */
+eap_payload_t *eap_payload_create_nak()
+{
+	eap_payload_t *this = eap_payload_create();
+	chunk_t data = chunk_alloca(5);
+	
+	*(data.ptr + 0) = EAP_RESPONSE;
+	*(data.ptr + 1) = 0;
+	*(u_int16_t*)(data.ptr + 2) = htons(data.len);
+	*(data.ptr + 4) = EAP_NAK;
+	
+	this->set_data(this, data);
+	return this;
+}