- nonce payload defined

diff --git a/Source/charon/payloads/nonce_payload.c b/Source/charon/payloads/nonce_payload.c
new file mode 100644 (file)
index 0000000..8126341
--- /dev/null
+++ b/Source/charon/payloads/nonce_payload.c
@@ -0,0 +1,236 @@
+/**
+ * @file nonce_payload.h
+ * 
+ * @brief Declaration of the class nonce_payload_t. 
+ * 
+ * An object of this type represents an IKEv2 Nonce-Payload.
+ * 
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * 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 "encodings.h"
+#include "../utils/allocator.h"
+
+
+
+/**
+ * Private data of an nonce_payload_t' Object
+ * 
+ */
+typedef struct private_nonce_payload_s private_nonce_payload_t;
+
+struct private_nonce_payload_s {
+       /**
+        * 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;
+       
+       /**
+        * @brief Computes the length of this payload.
+        *
+        * @param this  calling private_nonce_payload_t object
+        * @return              
+        *                              SUCCESS in any case
+        */
+       status_t (*compute_length) (private_nonce_payload_t *this);
+};
+
+/**
+ * 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,                        offsetof(private_nonce_payload_t, nonce)                        }
+};
+
+/**
+ * length of a nonce payload without a nonce in int
+ */
+#define NONCE_PAYLOAD_HEADER_LENGTH 4
+
+/**
+ * Implements payload_t's and nonce_payload_t's destroy function.
+ * See #payload_s.destroy or nonce_payload_s.destroy for description.
+ */
+static status_t destroy(private_nonce_payload_t *this)
+{
+       if (this->nonce.ptr)
+       {
+               allocator_free(this->nonce.ptr);
+       }
+       allocator_free(this);
+       
+       return SUCCESS;
+}
+
+/**
+ * Implements nonce_payload_t's set_nonce function.
+ * See #nonce_payload_t.set_nonce for description.
+ */
+static status_t set_nonce(private_nonce_payload_t *this, chunk_t nonce)
+{
+       if (nonce.len >= 16 && nonce.len <= 256)
+       {
+               this->nonce.len = nonce.len;
+               this->nonce.ptr = allocator_clone_bytes(nonce.ptr, nonce.len);
+               if (this->nonce.ptr == NULL)
+               {
+                       return OUT_OF_RES;      
+               }
+               this->payload_length = NONCE_PAYLOAD_HEADER_LENGTH + nonce.len;
+               return SUCCESS; 
+       }
+       return INVALID_ARG;
+}
+
+/**
+ * Implements nonce_payload_t's get_nonce function.
+ * See #nonce_payload_t.get_nonce for description.
+ */
+static status_t get_nonce(private_nonce_payload_t *this, chunk_t *nonce)
+{
+       nonce->len = this->nonce.len;
+       nonce->ptr = allocator_clone_bytes(this->nonce.ptr, this->nonce.len);
+       if (nonce->ptr == NULL)
+       {
+               return OUT_OF_RES;      
+       }
+       return SUCCESS;
+}
+
+/**
+ * Implements payload_t's get_encoding_rules function.
+ * See #payload_s.get_encoding_rules for description.
+ */
+static status_t 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);
+       
+       return SUCCESS;
+}
+
+/**
+ * Implements payload_t's get_type function.
+ * See #payload_s.get_type for description.
+ */
+static payload_type_t get_type(private_nonce_payload_t *this)
+{
+       return SECURITY_ASSOCIATION;
+}
+
+/**
+ * Implements payload_t's get_next_type function.
+ * See #payload_s.get_next_type for description.
+ */
+static payload_type_t get_next_type(private_nonce_payload_t *this)
+{
+       return (this->next_payload);
+}
+
+/**
+ * Implements payload_t's set_next_type function.
+ * See #payload_s.set_next_type for description.
+ */
+static status_t set_next_type(private_nonce_payload_t *this,payload_type_t type)
+{
+       this->next_payload = type;
+       return SUCCESS;
+}
+
+/**
+ * Implements payload_t's get_length function.
+ * See #payload_s.get_length for description.
+ */
+static size_t get_length(private_nonce_payload_t *this)
+{
+       this->compute_length(this);
+       return this->payload_length;
+}
+
+/*
+ * Described in header
+ */
+nonce_payload_t *nonce_payload_create()
+{
+       private_nonce_payload_t *this = allocator_alloc_thing(private_nonce_payload_t);
+       if (this == NULL)
+       {
+               return NULL;    
+       }       
+       
+       this->public.payload_interface.get_encoding_rules = (status_t (*) (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 = (status_t (*) (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 = (status_t (*) (payload_t *))destroy;
+       this->public.destroy = (status_t (*) (nonce_payload_t *)) destroy;
+       this->public.set_nonce = (status_t (*) (nonce_payload_t *,chunk_t)) set_nonce;
+       this->public.get_nonce = (status_t (*) (nonce_payload_t *,chunk_t*)) get_nonce;
+       
+       this->critical = FALSE;
+       this->next_payload = NO_PAYLOAD;
+       this->payload_length = NONCE_PAYLOAD_HEADER_LENGTH;
+
+       return (&(this->public));
+}
+
+

diff --git a/Source/charon/payloads/nonce_payload.h b/Source/charon/payloads/nonce_payload.h
new file mode 100644 (file)
index 0000000..25bc070
--- /dev/null
+++ b/Source/charon/payloads/nonce_payload.h
@@ -0,0 +1,86 @@
+/**
+ * @file nonce_payload.h
+ * 
+ * @brief Declaration of the class nonce_payload_t. 
+ * 
+ * An object of this type represents an IKEv2 Nonce-Payload.
+ * 
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * 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.
+ */
+
+#ifndef NONCE_PAYLOAD_H_
+#define NONCE_PAYLOAD_H_
+
+#include "../types.h"
+#include "payload.h"
+
+
+
+/**
+ * Object representing an IKEv2 Nonce payload
+ * 
+ * The Nonce payload format is described in draft section 3.3.
+ * 
+ */
+typedef struct nonce_payload_s nonce_payload_t;
+
+struct nonce_payload_s {
+       /**
+        * implements payload_t interface
+        */
+       payload_t payload_interface;
+
+       /**
+        * @brief Set the nonce value.
+        *
+        * @param this                  calling nonce_payload_t object
+        * @param nonce                 chunk containing the nonce, will be cloned
+        * @return                              SUCCESS in any case
+        */
+       status_t (*set_nonce) (nonce_payload_t *this, chunk_t nonce);
+       
+       /**
+        * @brief Get the nonce value.
+        *
+        * @param this                  calling nonce_payload_t object
+        * @param[out] nonce    chunk where the cloned nonce data is located
+        * @return                              SUCCESS in any case
+        */
+       status_t (*get_nonce) (nonce_payload_t *this, chunk_t *nonce);
+
+       /**
+        * @brief Destroys an nonce_payload_t object.
+        *
+        * @param this  nonce_payload_t object to destroy
+        * @return              
+        *                              SUCCESS in any case
+        */
+       status_t (*destroy) (nonce_payload_t *this);
+};
+
+/**
+ * @brief Creates an empty nonce_payload_t object
+ * 
+ * @return                     
+ *                                     - created nonce_payload_t object, or
+ *                                     - NULL if failed
+ */
+ 
+nonce_payload_t *nonce_payload_create();
+
+
+#endif /*NONCE_PAYLOAD_H_*/