isakmp-pkt.h

   1 /* ISAKMP packing and unpacking routines.
   2    Copyright (C) 2002  Geoffrey Keating
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17 */
  18
  19 #if defined(__linux__)
  20 #include <stdint.h>
  21 #endif
  22 #include <sys/types.h>
  23
  24 #include "isakmp.h"
  25
  26 struct isakmp_attribute {
  27   struct isakmp_attribute *next;
  28   uint16_t type;
  29   enum {
  30     isakmp_attr_lots,
  31     isakmp_attr_16,
  32     isakmp_attr_2x8
  33   } af;
  34   union {
  35     uint16_t attr_16;
  36     uint8_t attr_2x8[2];
  37     struct {
  38       uint16_t length;
  39       uint8_t *data;
  40     } lots;
  41   } u;
  42 };
  43
  44 struct isakmp_payload
  45 {
  46   struct isakmp_payload *next;
  47   enum isakmp_payload_enum type;
  48   union {
  49     struct {
  50       uint32_t doi;
  51       uint32_t situation;
  52       struct isakmp_payload *proposals;
  53     } sa;
  54     struct {
  55       uint8_t number;
  56       uint8_t prot_id;
  57       uint8_t spi_size;
  58       uint8_t *spi;
  59       struct isakmp_payload *transforms;
  60     } p;
  61     struct {
  62       uint8_t number;
  63       uint8_t id;
  64       struct isakmp_attribute *attributes;
  65     } t;
  66     struct {
  67       uint16_t length;
  68       uint8_t *data;
  69     } ke, hash, sig, nonce, vid;
  70     struct {
  71       uint8_t type;
  72       uint8_t protocol;
  73       uint16_t port;
  74       uint16_t length;
  75       uint8_t *data;
  76     } id;
  77     struct {
  78       uint8_t encoding;
  79       uint16_t length;
  80       uint8_t *data;
  81     } cert, cr;
  82     struct {
  83       uint32_t doi;
  84       uint8_t protocol;
  85       uint8_t spi_length;
  86       uint8_t *spi;
  87       uint16_t type;
  88       uint16_t data_length;
  89       uint8_t *data;
  90     } n;
  91     struct {
  92       uint32_t doi;
  93       uint8_t protocol;
  94       uint8_t spi_length;
  95       uint16_t num_spi;
  96       uint8_t **spi;
  97     } d;
  98     struct {
  99       uint8_t type;
 100       uint16_t id;
 101       struct isakmp_attribute *attributes;
 102     } modecfg;
 103   } u;
 104 };
 105
 106 struct isakmp_packet
 107 {
 108   uint8_t i_cookie[ISAKMP_COOKIE_LENGTH];
 109   uint8_t r_cookie[ISAKMP_COOKIE_LENGTH];
 110   uint8_t isakmp_version;
 111   uint8_t exchange_type;
 112   uint8_t flags;
 113   uint32_t message_id;
 114   struct isakmp_payload *payload;
 115 };
 116
 117 extern void * xallocc (size_t x);
 118 extern struct isakmp_packet * new_isakmp_packet(void);
 119 extern struct isakmp_payload * new_isakmp_payload(uint8_t);
 120 extern struct isakmp_payload *
 121   new_isakmp_data_payload(uint8_t type, const void *data, size_t data_length);
 122 extern struct isakmp_attribute *
 123   new_isakmp_attribute(uint16_t, struct isakmp_attribute *);
 124 extern struct isakmp_attribute *
 125   new_isakmp_attribute_16 (uint16_t type, uint16_t data,
 126                            struct isakmp_attribute *next);
 127 extern void free_isakmp_packet(struct isakmp_packet *p);
 128 extern void flatten_isakmp_payload (struct isakmp_payload *p,
 129                                     uint8_t **result, size_t *size);
 130 extern void flatten_isakmp_packet (struct isakmp_packet *p,
 131                                    uint8_t **result, size_t *size, size_t blksz);
 132 extern struct isakmp_packet * parse_isakmp_packet (const uint8_t *data,
 133                                                    size_t data_len,
 134                                                    uint16_t *reject);
 135 extern const char * isakmp_notify_to_error (uint16_t notify);
 136 extern void test_pack_unpack(void);