crypto/ex_data.c

   1 /* crypto/ex_data.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <openssl/buffer.h>
  62 #include <openssl/bio.h>
  63 #include <openssl/lhash.h>
  64 #include "cryptlib.h"
  65
  66 int CRYPTO_get_ex_new_index(int idx, STACK_OF(CRYPTO_EX_DATA_FUNCS) **skp, long argl, void *argp,
  67              CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
  68         {
  69         int ret= -1;
  70         CRYPTO_EX_DATA_FUNCS *a;
  71
  72         MemCheck_off();
  73         if (*skp == NULL)
  74                 *skp=sk_CRYPTO_EX_DATA_FUNCS_new_null();
  75         if (*skp == NULL)
  76                 {
  77                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX,ERR_R_MALLOC_FAILURE);
  78                 goto err;
  79                 }
  80         a=(CRYPTO_EX_DATA_FUNCS *)OPENSSL_malloc(sizeof(CRYPTO_EX_DATA_FUNCS));
  81         if (a == NULL)
  82                 {
  83                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX,ERR_R_MALLOC_FAILURE);
  84                 goto err;
  85                 }
  86         a->argl=argl;
  87         a->argp=argp;
  88         a->new_func=new_func;
  89         a->dup_func=dup_func;
  90         a->free_func=free_func;
  91         while (sk_CRYPTO_EX_DATA_FUNCS_num(*skp) <= idx)
  92                 {
  93                 if (!sk_CRYPTO_EX_DATA_FUNCS_push(*skp,NULL))
  94                         {
  95                         CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX,ERR_R_MALLOC_FAILURE);
  96                         OPENSSL_free(a);
  97                         goto err;
  98                         }
  99                 }
 100         sk_CRYPTO_EX_DATA_FUNCS_set(*skp,idx, a);
 101         ret=idx;
 102 err:
 103         MemCheck_on();
 104         return(ret);
 105         }
 106
 107 int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, void *val)
 108         {
 109         int i;
 110
 111         if (ad->sk == NULL)
 112                 {
 113                 if ((ad->sk=sk_new_null()) == NULL)
 114                         {
 115                         CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE);
 116                         return(0);
 117                         }
 118                 }
 119         i=sk_num(ad->sk);
 120
 121         while (i <= idx)
 122                 {
 123                 if (!sk_push(ad->sk,NULL))
 124                         {
 125                         CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE);
 126                         return(0);
 127                         }
 128                 i++;
 129                 }
 130         sk_set(ad->sk,idx,val);
 131         return(1);
 132         }
 133
 134 void *CRYPTO_get_ex_data(CRYPTO_EX_DATA *ad, int idx)
 135         {
 136         if (ad->sk == NULL)
 137                 return(0);
 138         else if (idx >= sk_num(ad->sk))
 139                 return(0);
 140         else
 141                 return(sk_value(ad->sk,idx));
 142         }
 143
 144 /* The callback is called with the 'object', which is the original data object
 145  * being duplicated, a pointer to the
 146  * 'new' object to be inserted, the index, and the argi/argp
 147  */
 148 int CRYPTO_dup_ex_data(STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth, CRYPTO_EX_DATA *to,
 149              CRYPTO_EX_DATA *from)
 150         {
 151         int i,j,m,r;
 152         CRYPTO_EX_DATA_FUNCS *mm;
 153         char *from_d;
 154
 155         if (meth == NULL) return(1);
 156         if (from->sk == NULL) return(1);
 157         m=sk_CRYPTO_EX_DATA_FUNCS_num(meth);
 158         j=sk_num(from->sk);
 159         for (i=0; i<j; i++)
 160                 {
 161                 from_d=CRYPTO_get_ex_data(from,i);
 162                 if (i < m)
 163                         {
 164                         mm=sk_CRYPTO_EX_DATA_FUNCS_value(meth,i);
 165                         if (mm->dup_func != NULL)
 166                                 r=mm->dup_func(to,from,(char **)&from_d,i,
 167                                         mm->argl,mm->argp);
 168                         }
 169                 CRYPTO_set_ex_data(to,i,from_d);
 170                 }
 171         return(1);
 172         }
 173
 174 /* Call each free callback */
 175 void CRYPTO_free_ex_data(STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth, void *obj, CRYPTO_EX_DATA *ad)
 176         {
 177         CRYPTO_EX_DATA_FUNCS *m;
 178         void *ptr;
 179         int i,max;
 180
 181         if (meth != NULL)
 182                 {
 183                 max=sk_CRYPTO_EX_DATA_FUNCS_num(meth);
 184                 for (i=0; i<max; i++)
 185                         {
 186                         m=sk_CRYPTO_EX_DATA_FUNCS_value(meth,i);
 187                         if ((m != NULL) && (m->free_func != NULL))
 188                                 {
 189                                 ptr=CRYPTO_get_ex_data(ad,i);
 190                                 m->free_func(obj,ptr,ad,i,m->argl,m->argp);
 191                                 }
 192                         }
 193                 }
 194         if (ad->sk != NULL)
 195                 {
 196                 sk_free(ad->sk);
 197                 ad->sk=NULL;
 198                 }
 199         }
 200
 201 void CRYPTO_new_ex_data(STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth, void *obj, CRYPTO_EX_DATA *ad)
 202         {
 203         CRYPTO_EX_DATA_FUNCS *m;
 204         void *ptr;
 205         int i,max;
 206
 207         ad->sk=NULL;
 208         if (meth != NULL)
 209                 {
 210                 max=sk_CRYPTO_EX_DATA_FUNCS_num(meth);
 211                 for (i=0; i<max; i++)
 212                         {
 213                         m=sk_CRYPTO_EX_DATA_FUNCS_value(meth,i);
 214                         if ((m != NULL) && (m->new_func != NULL))
 215                                 {
 216                                 ptr=CRYPTO_get_ex_data(ad,i);
 217                                 m->new_func(obj,ptr,ad,i,m->argl,m->argp);
 218                                 }
 219                         }
 220                 }
 221         }
 222
 223 IMPLEMENT_STACK_OF(CRYPTO_EX_DATA_FUNCS)