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

1 files changed, 481 insertions, 0 deletions

diff --git a/src/charon/encoding/payloads/notify_payload.c b/src/charon/encoding/payloads/notify_payload.c
new file mode 100644
index 000000000..a04901a90
--- /dev/null
+++ b/src/charon/encoding/payloads/notify_payload.c
@@ -0,0 +1,481 @@
+/**
+ * @file notify_payload.c
+ * 
+ * @brief Implementation of notify_payload_t.
+ * 
+ */
+
+/*
+ * Copyright (C) 2006 Tobias Brunner, Daniel Roethlisberger
+ * 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 "notify_payload.h"
+
+#include <daemon.h>
+#include <encoding/payloads/encodings.h>
+#include <crypto/hashers/hasher.h>
+
+ENUM_BEGIN(notify_type_names, UNSUPPORTED_CRITICAL_PAYLOAD, UNSUPPORTED_CRITICAL_PAYLOAD,
+	"UNSUPPORTED_CRITICAL_PAYLOAD");
+ENUM_NEXT(notify_type_names, INVALID_IKE_SPI, INVALID_MAJOR_VERSION, UNSUPPORTED_CRITICAL_PAYLOAD,
+	"INVALID_IKE_SPI",
+	"INVALID_MAJOR_VERSION");
+ENUM_NEXT(notify_type_names, INVALID_SYNTAX, INVALID_SYNTAX, INVALID_MAJOR_VERSION,
+	"INVALID_SYNTAX");
+ENUM_NEXT(notify_type_names, INVALID_MESSAGE_ID, INVALID_MESSAGE_ID, INVALID_SYNTAX,
+	"INVALID_MESSAGE_ID");
+ENUM_NEXT(notify_type_names, INVALID_SPI, INVALID_SPI, INVALID_MESSAGE_ID,
+	"INVALID_SPI");
+ENUM_NEXT(notify_type_names, NO_PROPOSAL_CHOSEN, NO_PROPOSAL_CHOSEN, INVALID_SPI,
+	"NO_PROPOSAL_CHOSEN");
+ENUM_NEXT(notify_type_names, INVALID_KE_PAYLOAD, INVALID_KE_PAYLOAD, NO_PROPOSAL_CHOSEN,
+	"INVALID_KE_PAYLOAD");
+ENUM_NEXT(notify_type_names, AUTHENTICATION_FAILED, AUTHENTICATION_FAILED, INVALID_KE_PAYLOAD,
+	"AUTHENTICATION_FAILED");
+ENUM_NEXT(notify_type_names, SINGLE_PAIR_REQUIRED, INVALID_SELECTORS, AUTHENTICATION_FAILED,
+	"SINGLE_PAIR_REQUIRED",
+	"NO_ADDITIONAL_SAS",
+	"INTERNAL_ADDRESS_FAILURE",
+	"FAILED_CP_REQUIRED",
+	"TS_UNACCEPTABLE",
+	"INVALID_SELECTORS");
+ENUM_NEXT(notify_type_names, INITIAL_CONTACT, AUTH_LIFETIME, INVALID_SELECTORS,
+	"INITIAL_CONTACT",
+	"SET_WINDOW_SIZE",
+	"ADDITIONAL_TS_POSSIBLE",
+	"IPCOMP_SUPPORTED",
+	"NAT_DETECTION_SOURCE_IP",
+	"NAT_DETECTION_DESTINATION_IP",
+	"COOKIE",
+	"USE_TRANSPORT_MODE",
+	"HTTP_CERT_LOOKUP_SUPPORTED",
+	"REKEY_SA",
+	"ESP_TFC_PADDING_NOT_SUPPORTED",
+	"NON_FIRST_FRAGMENTS_ALSO",
+	"MOBIKE_SUPPORTED",
+	"ADDITIONAL_IP4_ADDRESS",
+	"ADDITIONAL_IP6_ADDRESS",
+	"NO_ADDITIONAL_ADDRESSES",
+	"UPDATE_SA_ADDRESSES",
+	"COOKIE2",
+	"NO_NATS_ALLOWED",
+	"AUTH_LIFETIME");
+ENUM_NEXT(notify_type_names, EAP_ONLY_AUTHENTICATION, EAP_ONLY_AUTHENTICATION, AUTH_LIFETIME,
+	"EAP_ONLY_AUTHENTICATION");
+ENUM_END(notify_type_names, EAP_ONLY_AUTHENTICATION);
+
+typedef struct private_notify_payload_t private_notify_payload_t;
+
+/**
+ * Private data of an notify_payload_t object.
+ * 
+ */
+struct private_notify_payload_t {
+	/**
+	 * Public notify_payload_t interface.
+	 */
+	notify_payload_t public;
+	
+	/**
+	 * Next payload type.
+	 */
+	u_int8_t  next_payload;
+
+	/**
+	 * Critical flag.
+	 */
+	bool critical;
+		
+	/**
+	 * Length of this payload.
+	 */
+	u_int16_t payload_length;
+		
+	/**
+	 * Protocol id.
+	 */
+	u_int8_t protocol_id;
+	
+	/**
+	 * Spi size.
+	 */
+	u_int8_t spi_size;
+	
+	/**
+	 * Notify message type.
+	 */
+	u_int16_t notify_type;
+	
+	/**
+	 * Security parameter index (spi).
+	 */
+	chunk_t spi;
+
+	/**
+	 * Notification data.
+	 */
+	chunk_t notification_data;
+};
+
+/**
+ * Encoding rules to parse or generate a IKEv2-Notify Payload.
+ * 
+ * The defined offsets are the positions in a object of type 
+ * private_notify_payload_t.
+ * 
+ */
+encoding_rule_t notify_payload_encodings[] = {
+ 	/* 1 Byte next payload type, stored in the field next_payload */
+	{ U_INT_8,			offsetof(private_notify_payload_t, next_payload) 		},
+	/* the critical bit */
+	{ FLAG,				offsetof(private_notify_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_notify_payload_t, payload_length) 		},	
+	/* Protocol ID as 8 bit field*/
+	{ U_INT_8,			offsetof(private_notify_payload_t, protocol_id) 			},
+	/* SPI Size as 8 bit field*/
+	{ SPI_SIZE,			offsetof(private_notify_payload_t, spi_size) 			},
+	/* Notify message type as 16 bit field*/
+	{ U_INT_16,			offsetof(private_notify_payload_t, notify_type)	},
+	/* SPI as variable length field*/
+	{ SPI,				offsetof(private_notify_payload_t, spi)		 			},
+	/* Key Exchange Data is from variable size */
+	{ NOTIFICATION_DATA,	offsetof(private_notify_payload_t, notification_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        !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      !  Protocol ID  !   SPI Size    !      Notify Message Type      !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      !                                                               !
+      ~                Security Parameter Index (SPI)                 ~
+      !                                                               !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      !                                                               !
+      ~                       Notification Data                       ~
+      !                                                               !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+/**
+ * Implementation of payload_t.verify.
+ */
+static status_t verify(private_notify_payload_t *this)
+{
+	switch (this->protocol_id)
+	{
+		case PROTO_NONE:
+		case PROTO_IKE:
+		case PROTO_AH:
+		case PROTO_ESP:
+			break;
+		default:
+			DBG1(DBG_ENC, "Unknown protocol (%d)", this->protocol_id);
+			return FAILED;
+	}
+	
+	switch (this->notify_type)
+	{
+		case INVALID_KE_PAYLOAD:
+		{
+			/* check notification data */
+			diffie_hellman_group_t dh_group;
+			if (this->notification_data.len != 2)
+			{
+				DBG1(DBG_ENC, "invalid notify data length for %N (%d)",
+					 notify_type_names, this->notify_type,
+					 this->notification_data.len);
+				return FAILED;
+			}
+			dh_group = ntohs(*((u_int16_t*)this->notification_data.ptr));
+			switch (dh_group)
+			{
+				case MODP_768_BIT:
+				case MODP_1024_BIT:
+				case MODP_1536_BIT:
+				case MODP_2048_BIT:
+				case MODP_3072_BIT:
+				case MODP_4096_BIT:
+				case MODP_6144_BIT:
+				case MODP_8192_BIT:
+					break;
+				default:
+					DBG1(DBG_ENC, "Bad DH group (%d)", dh_group);
+					return FAILED;
+			}
+			break;
+		}
+		case NAT_DETECTION_SOURCE_IP:
+		case NAT_DETECTION_DESTINATION_IP:
+		{
+			if (this->notification_data.len != HASH_SIZE_SHA1)
+			{
+				DBG1(DBG_ENC, "invalid %N notify length",
+					 notify_type_names, this->notify_type);
+				return FAILED;
+			}
+			break;
+		}
+		case INVALID_SYNTAX:
+		case INVALID_MAJOR_VERSION:
+		case NO_PROPOSAL_CHOSEN:
+		{
+			if (this->notification_data.len != 0)
+			{
+				DBG1(DBG_ENC, "invalid %N notify",
+					 notify_type_names, this->notify_type);
+				return FAILED;
+			}
+			break;
+		}
+		default:
+			/* TODO: verify */
+			break;
+	}
+	return SUCCESS;
+}
+
+/**
+ * Implementation of payload_t.get_encoding_rules.
+ */
+static void get_encoding_rules(private_notify_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
+{
+	*rules = notify_payload_encodings;
+	*rule_count = sizeof(notify_payload_encodings) / sizeof(encoding_rule_t);
+}
+
+/**
+ * Implementation of payload_t.get_type.
+ */
+static payload_type_t get_type(private_notify_payload_t *this)
+{
+	return NOTIFY;
+}
+
+/**
+ * Implementation of payload_t.get_next_type.
+ */
+static payload_type_t get_next_type(private_notify_payload_t *this)
+{
+	return (this->next_payload);
+}
+
+/**
+ * Implementation of payload_t.set_next_type.
+ */
+static void set_next_type(private_notify_payload_t *this,payload_type_t type)
+{
+	this->next_payload = type;
+}
+
+/**
+ * recompute the payloads length.
+ */
+static void compute_length (private_notify_payload_t *this)
+{
+	size_t length = NOTIFY_PAYLOAD_HEADER_LENGTH;
+	if (this->notification_data.ptr != NULL)
+	{
+		length += this->notification_data.len;
+	}
+	if (this->spi.ptr != NULL)
+	{
+		length += this->spi.len;
+	}
+	this->payload_length = length;
+}
+
+/**
+ * Implementation of payload_t.get_length.
+ */
+static size_t get_length(private_notify_payload_t *this)
+{
+	compute_length(this);
+	return this->payload_length;
+}
+
+/**
+ * Implementation of notify_payload_t.get_protocol_id.
+ */
+static u_int8_t get_protocol_id(private_notify_payload_t *this)
+{
+	return this->protocol_id;
+}
+
+/**
+ * Implementation of notify_payload_t.set_protocol_id.
+ */
+static void set_protocol_id(private_notify_payload_t *this, u_int8_t protocol_id)
+{
+	this->protocol_id = protocol_id;
+}
+
+/**
+ * Implementation of notify_payload_t.get_notify_type.
+ */
+static notify_type_t get_notify_type(private_notify_payload_t *this)
+{
+	return this->notify_type;
+}
+
+/**
+ * Implementation of notify_payload_t.set_notify_type.
+ */
+static void set_notify_type(private_notify_payload_t *this, u_int16_t notify_type)
+{
+	this->notify_type = notify_type;
+}
+
+/**
+ * Implementation of notify_payload_t.get_spi.
+ */
+static u_int32_t get_spi(private_notify_payload_t *this)
+{
+	switch (this->protocol_id)
+	{
+		case PROTO_AH:
+		case PROTO_ESP:
+			if (this->spi.len == 4)
+			{
+				return *((u_int32_t*)this->spi.ptr);
+			}
+		default:
+			break;
+	}
+	return 0;
+}
+
+/**
+ * Implementation of notify_payload_t.set_spi.
+ */
+static void set_spi(private_notify_payload_t *this, u_int32_t spi)
+{
+	chunk_free(&this->spi);
+	switch (this->protocol_id)
+	{
+		case PROTO_AH:
+		case PROTO_ESP:
+			this->spi = chunk_alloc(4);
+			*((u_int32_t*)this->spi.ptr) = spi;
+			break;
+		default:
+			break;
+	}
+	this->spi_size = this->spi.len;
+	compute_length(this);
+}
+
+/**
+ * Implementation of notify_payload_t.get_notification_data.
+ */
+static chunk_t get_notification_data(private_notify_payload_t *this)
+{
+	return (this->notification_data);
+}
+
+/**
+ * Implementation of notify_payload_t.set_notification_data.
+ */
+static status_t set_notification_data(private_notify_payload_t *this, chunk_t notification_data)
+{
+	chunk_free(&this->notification_data);
+	if (notification_data.len > 0)
+	{
+		this->notification_data = chunk_clone(notification_data);
+	}
+	compute_length(this);
+	return SUCCESS;
+}
+
+/**
+ * Implementation of notify_payload_t.destroy and notify_payload_t.destroy.
+ */
+static status_t destroy(private_notify_payload_t *this)
+{
+	chunk_free(&this->notification_data);
+	chunk_free(&this->spi);
+	free(this);
+	return SUCCESS;
+}
+
+/*
+ * Described in header
+ */
+notify_payload_t *notify_payload_create()
+{
+	private_notify_payload_t *this = malloc_thing(private_notify_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.get_protocol_id = (u_int8_t (*) (notify_payload_t *)) get_protocol_id;
+	this->public.set_protocol_id  = (void (*) (notify_payload_t *,u_int8_t)) set_protocol_id;
+	this->public.get_notify_type = (notify_type_t (*) (notify_payload_t *)) get_notify_type;
+	this->public.set_notify_type = (void (*) (notify_payload_t *,notify_type_t)) set_notify_type;
+	this->public.get_spi = (u_int32_t (*) (notify_payload_t *)) get_spi;
+	this->public.set_spi = (void (*) (notify_payload_t *,u_int32_t)) set_spi;
+	this->public.get_notification_data = (chunk_t (*) (notify_payload_t *)) get_notification_data;
+	this->public.set_notification_data = (void (*) (notify_payload_t *,chunk_t)) set_notification_data;
+	this->public.destroy = (void (*) (notify_payload_t *)) destroy;
+	
+	/* set default values of the fields */
+	this->critical = FALSE;
+	this->next_payload = NO_PAYLOAD;
+	this->payload_length = NOTIFY_PAYLOAD_HEADER_LENGTH;
+	this->protocol_id = 0;
+	this->notify_type = 0;
+	this->spi.ptr = NULL;
+	this->spi.len = 0;
+	this->spi_size = 0;
+	this->notification_data.ptr = NULL;
+	this->notification_data.len = 0;
+	
+	return &this->public;
+}
+
+/*
+ * Described in header.
+ */
+notify_payload_t *notify_payload_create_from_protocol_and_type(protocol_id_t protocol_id, notify_type_t notify_type)
+{
+	notify_payload_t *notify = notify_payload_create();
+
+	notify->set_notify_type(notify,notify_type);
+	notify->set_protocol_id(notify,protocol_id);
+	
+	return notify;
+}