release/src/router/openssl/crypto/dso/dso_lib.c

   1 /* dso_lib.c */
   2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include <openssl/crypto.h>
  61 #include "cryptlib.h"
  62 #include <openssl/dso.h>
  63
  64 static DSO_METHOD *default_DSO_meth = NULL;
  65
  66 DSO *DSO_new(void)
  67         {
  68         return(DSO_new_method(NULL));
  69         }
  70
  71 void DSO_set_default_method(DSO_METHOD *meth)
  72         {
  73         default_DSO_meth = meth;
  74         }
  75
  76 DSO_METHOD *DSO_get_default_method(void)
  77         {
  78         return(default_DSO_meth);
  79         }
  80
  81 DSO_METHOD *DSO_get_method(DSO *dso)
  82         {
  83         return(dso->meth);
  84         }
  85
  86 DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
  87         {
  88         DSO_METHOD *mtmp;
  89         mtmp = dso->meth;
  90         dso->meth = meth;
  91         return(mtmp);
  92         }
  93
  94 DSO *DSO_new_method(DSO_METHOD *meth)
  95         {
  96         DSO *ret;
  97
  98         if(default_DSO_meth == NULL)
  99                 /* We default to DSO_METH_openssl() which in turn defaults
 100                  * to stealing the "best available" method. Will fallback
 101                  * to DSO_METH_null() in the worst case. */
 102                 default_DSO_meth = DSO_METHOD_openssl();
 103         ret = (DSO *)OPENSSL_malloc(sizeof(DSO));
 104         if(ret == NULL)
 105                 {
 106                 DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
 107                 return(NULL);
 108                 }
 109         memset(ret, 0, sizeof(DSO));
 110         ret->meth_data = sk_new_null();
 111         if((ret->meth_data = sk_new_null()) == NULL)
 112                 {
 113                 /* sk_new doesn't generate any errors so we do */
 114                 DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
 115                 OPENSSL_free(ret);
 116                 return(NULL);
 117                 }
 118         if(meth == NULL)
 119                 ret->meth = default_DSO_meth;
 120         else
 121                 ret->meth = meth;
 122         ret->references = 1;
 123         if((ret->meth->init != NULL) && !ret->meth->init(ret))
 124                 {
 125                 OPENSSL_free(ret);
 126                 ret=NULL;
 127                 }
 128         return(ret);
 129         }
 130
 131 int DSO_free(DSO *dso)
 132         {
 133         int i;
 134
 135         if(dso == NULL)
 136                 {
 137                 DSOerr(DSO_F_DSO_FREE,ERR_R_PASSED_NULL_PARAMETER);
 138                 return(0);
 139                 }
 140
 141         i=CRYPTO_add(&dso->references,-1,CRYPTO_LOCK_DSO);
 142 #ifdef REF_PRINT
 143         REF_PRINT("DSO",dso);
 144 #endif
 145         if(i > 0) return(1);
 146 #ifdef REF_CHECK
 147         if(i < 0)
 148                 {
 149                 fprintf(stderr,"DSO_free, bad reference count\n");
 150                 abort();
 151                 }
 152 #endif
 153
 154         if((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso))
 155                 {
 156                 DSOerr(DSO_F_DSO_FREE,DSO_R_UNLOAD_FAILED);
 157                 return(0);
 158                 }
 159
 160         if((dso->meth->finish != NULL) && !dso->meth->finish(dso))
 161                 {
 162                 DSOerr(DSO_F_DSO_FREE,DSO_R_FINISH_FAILED);
 163                 return(0);
 164                 }
 165
 166         sk_free(dso->meth_data);
 167
 168         OPENSSL_free(dso);
 169         return(1);
 170         }
 171
 172 int DSO_flags(DSO *dso)
 173         {
 174         return((dso == NULL) ? 0 : dso->flags);
 175         }
 176
 177
 178 int DSO_up(DSO *dso)
 179         {
 180         if (dso == NULL)
 181                 {
 182                 DSOerr(DSO_F_DSO_UP,ERR_R_PASSED_NULL_PARAMETER);
 183                 return(0);
 184                 }
 185
 186         CRYPTO_add(&dso->references,1,CRYPTO_LOCK_DSO);
 187         return(1);
 188         }
 189
 190 DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
 191         {
 192         DSO *ret;
 193         int allocated = 0;
 194
 195         if(filename == NULL)
 196                 {
 197                 DSOerr(DSO_F_DSO_LOAD,ERR_R_PASSED_NULL_PARAMETER);
 198                 return(NULL);
 199                 }
 200         if(dso == NULL)
 201                 {
 202                 ret = DSO_new_method(meth);
 203                 if(ret == NULL)
 204                         {
 205                         DSOerr(DSO_F_DSO_LOAD,ERR_R_MALLOC_FAILURE);
 206                         return(NULL);
 207                         }
 208                 allocated = 1;
 209                 }
 210         else
 211                 ret = dso;
 212         /* Bleurgh ... have to check for negative return values for
 213          * errors. <grimace> */
 214         if(DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0)
 215                 {
 216                 DSOerr(DSO_F_DSO_LOAD,DSO_R_CTRL_FAILED);
 217                 if(allocated)
 218                         DSO_free(ret);
 219                 return(NULL);
 220                 }
 221         if(ret->meth->dso_load == NULL)
 222                 {
 223                 DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED);
 224                 if(allocated)
 225                         DSO_free(ret);
 226                 return(NULL);
 227                 }
 228         if(!ret->meth->dso_load(ret, filename))
 229                 {
 230                 DSOerr(DSO_F_DSO_LOAD,DSO_R_LOAD_FAILED);
 231                 if(allocated)
 232                         DSO_free(ret);
 233                 return(NULL);
 234                 }
 235         /* Load succeeded */
 236         return(ret);
 237         }
 238
 239 void *DSO_bind_var(DSO *dso, const char *symname)
 240         {
 241         void *ret = NULL;
 242
 243         if((dso == NULL) || (symname == NULL))
 244                 {
 245                 DSOerr(DSO_F_DSO_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
 246                 return(NULL);
 247                 }
 248         if(dso->meth->dso_bind_var == NULL)
 249                 {
 250                 DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_UNSUPPORTED);
 251                 return(NULL);
 252                 }
 253         if((ret = dso->meth->dso_bind_var(dso, symname)) == NULL)
 254                 {
 255                 DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_SYM_FAILURE);
 256                 return(NULL);
 257                 }
 258         /* Success */
 259         return(ret);
 260         }
 261
 262 DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)
 263         {
 264         DSO_FUNC_TYPE ret = NULL;
 265
 266         if((dso == NULL) || (symname == NULL))
 267                 {
 268                 DSOerr(DSO_F_DSO_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
 269                 return(NULL);
 270                 }
 271         if(dso->meth->dso_bind_func == NULL)
 272                 {
 273                 DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_UNSUPPORTED);
 274                 return(NULL);
 275                 }
 276         if((ret = dso->meth->dso_bind_func(dso, symname)) == NULL)
 277                 {
 278                 DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_SYM_FAILURE);
 279                 return(NULL);
 280                 }
 281         /* Success */
 282         return(ret);
 283         }
 284
 285 /* I don't really like these *_ctrl functions very much to be perfectly
 286  * honest. For one thing, I think I have to return a negative value for
 287  * any error because possible DSO_ctrl() commands may return values
 288  * such as "size"s that can legitimately be zero (making the standard
 289  * "if(DSO_cmd(...))" form that works almost everywhere else fail at
 290  * odd times. I'd prefer "output" values to be passed by reference and
 291  * the return value as success/failure like usual ... but we conform
 292  * when we must... :-) */
 293 long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
 294         {
 295         if(dso == NULL)
 296                 {
 297                 DSOerr(DSO_F_DSO_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 298                 return(-1);
 299                 }
 300         if((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL))
 301                 {
 302                 DSOerr(DSO_F_DSO_CTRL,DSO_R_UNSUPPORTED);
 303                 return(-1);
 304                 }
 305         return(dso->meth->dso_ctrl(dso,cmd,larg,parg));
 306         }