Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* dso_lib.c -*- mode:C; c-file-style: "eay" -*- */ |
| 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_void_new_null(); |
| 111 | if(ret->meth_data == 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_void_free(dso->meth_data); |
| 167 | if(dso->filename != NULL) |
| 168 | OPENSSL_free(dso->filename); |
| 169 | if(dso->loaded_filename != NULL) |
| 170 | OPENSSL_free(dso->loaded_filename); |
| 171 | |
| 172 | OPENSSL_free(dso); |
| 173 | return(1); |
| 174 | } |
| 175 | |
| 176 | int DSO_flags(DSO *dso) |
| 177 | { |
| 178 | return((dso == NULL) ? 0 : dso->flags); |
| 179 | } |
| 180 | |
| 181 | |
| 182 | int DSO_up_ref(DSO *dso) |
| 183 | { |
| 184 | if (dso == NULL) |
| 185 | { |
| 186 | DSOerr(DSO_F_DSO_UP_REF,ERR_R_PASSED_NULL_PARAMETER); |
| 187 | return(0); |
| 188 | } |
| 189 | |
| 190 | CRYPTO_add(&dso->references,1,CRYPTO_LOCK_DSO); |
| 191 | return(1); |
| 192 | } |
| 193 | |
| 194 | DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags) |
| 195 | { |
| 196 | DSO *ret; |
| 197 | int allocated = 0; |
| 198 | |
| 199 | if(dso == NULL) |
| 200 | { |
| 201 | ret = DSO_new_method(meth); |
| 202 | if(ret == NULL) |
| 203 | { |
| 204 | DSOerr(DSO_F_DSO_LOAD,ERR_R_MALLOC_FAILURE); |
| 205 | goto err; |
| 206 | } |
| 207 | allocated = 1; |
| 208 | /* Pass the provided flags to the new DSO object */ |
| 209 | if(DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) |
| 210 | { |
| 211 | DSOerr(DSO_F_DSO_LOAD,DSO_R_CTRL_FAILED); |
| 212 | goto err; |
| 213 | } |
| 214 | } |
| 215 | else |
| 216 | ret = dso; |
| 217 | /* Don't load if we're currently already loaded */ |
| 218 | if(ret->filename != NULL) |
| 219 | { |
| 220 | DSOerr(DSO_F_DSO_LOAD,DSO_R_DSO_ALREADY_LOADED); |
| 221 | goto err; |
| 222 | } |
| 223 | /* filename can only be NULL if we were passed a dso that already has |
| 224 | * one set. */ |
| 225 | if(filename != NULL) |
| 226 | if(!DSO_set_filename(ret, filename)) |
| 227 | { |
| 228 | DSOerr(DSO_F_DSO_LOAD,DSO_R_SET_FILENAME_FAILED); |
| 229 | goto err; |
| 230 | } |
| 231 | filename = ret->filename; |
| 232 | if(filename == NULL) |
| 233 | { |
| 234 | DSOerr(DSO_F_DSO_LOAD,DSO_R_NO_FILENAME); |
| 235 | goto err; |
| 236 | } |
| 237 | if(ret->meth->dso_load == NULL) |
| 238 | { |
| 239 | DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED); |
| 240 | goto err; |
| 241 | } |
| 242 | if(!ret->meth->dso_load(ret)) |
| 243 | { |
| 244 | DSOerr(DSO_F_DSO_LOAD,DSO_R_LOAD_FAILED); |
| 245 | goto err; |
| 246 | } |
| 247 | /* Load succeeded */ |
| 248 | return(ret); |
| 249 | err: |
| 250 | if(allocated) |
| 251 | DSO_free(ret); |
| 252 | return(NULL); |
| 253 | } |
| 254 | |
| 255 | void *DSO_bind_var(DSO *dso, const char *symname) |
| 256 | { |
| 257 | void *ret = NULL; |
| 258 | |
| 259 | if((dso == NULL) || (symname == NULL)) |
| 260 | { |
| 261 | DSOerr(DSO_F_DSO_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER); |
| 262 | return(NULL); |
| 263 | } |
| 264 | if(dso->meth->dso_bind_var == NULL) |
| 265 | { |
| 266 | DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_UNSUPPORTED); |
| 267 | return(NULL); |
| 268 | } |
| 269 | if((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) |
| 270 | { |
| 271 | DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_SYM_FAILURE); |
| 272 | return(NULL); |
| 273 | } |
| 274 | /* Success */ |
| 275 | return(ret); |
| 276 | } |
| 277 | |
| 278 | DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname) |
| 279 | { |
| 280 | DSO_FUNC_TYPE ret = NULL; |
| 281 | |
| 282 | if((dso == NULL) || (symname == NULL)) |
| 283 | { |
| 284 | DSOerr(DSO_F_DSO_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER); |
| 285 | return(NULL); |
| 286 | } |
| 287 | if(dso->meth->dso_bind_func == NULL) |
| 288 | { |
| 289 | DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_UNSUPPORTED); |
| 290 | return(NULL); |
| 291 | } |
| 292 | if((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) |
| 293 | { |
| 294 | DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_SYM_FAILURE); |
| 295 | return(NULL); |
| 296 | } |
| 297 | /* Success */ |
| 298 | return(ret); |
| 299 | } |
| 300 | |
| 301 | /* I don't really like these *_ctrl functions very much to be perfectly |
| 302 | * honest. For one thing, I think I have to return a negative value for |
| 303 | * any error because possible DSO_ctrl() commands may return values |
| 304 | * such as "size"s that can legitimately be zero (making the standard |
| 305 | * "if(DSO_cmd(...))" form that works almost everywhere else fail at |
| 306 | * odd times. I'd prefer "output" values to be passed by reference and |
| 307 | * the return value as success/failure like usual ... but we conform |
| 308 | * when we must... :-) */ |
| 309 | long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg) |
| 310 | { |
| 311 | if(dso == NULL) |
| 312 | { |
| 313 | DSOerr(DSO_F_DSO_CTRL,ERR_R_PASSED_NULL_PARAMETER); |
| 314 | return(-1); |
| 315 | } |
| 316 | /* We should intercept certain generic commands and only pass control |
| 317 | * to the method-specific ctrl() function if it's something we don't |
| 318 | * handle. */ |
| 319 | switch(cmd) |
| 320 | { |
| 321 | case DSO_CTRL_GET_FLAGS: |
| 322 | return dso->flags; |
| 323 | case DSO_CTRL_SET_FLAGS: |
| 324 | dso->flags = (int)larg; |
| 325 | return(0); |
| 326 | case DSO_CTRL_OR_FLAGS: |
| 327 | dso->flags |= (int)larg; |
| 328 | return(0); |
| 329 | default: |
| 330 | break; |
| 331 | } |
| 332 | if((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) |
| 333 | { |
| 334 | DSOerr(DSO_F_DSO_CTRL,DSO_R_UNSUPPORTED); |
| 335 | return(-1); |
| 336 | } |
| 337 | return(dso->meth->dso_ctrl(dso,cmd,larg,parg)); |
| 338 | } |
| 339 | |
| 340 | int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb, |
| 341 | DSO_NAME_CONVERTER_FUNC *oldcb) |
| 342 | { |
| 343 | if(dso == NULL) |
| 344 | { |
| 345 | DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, |
| 346 | ERR_R_PASSED_NULL_PARAMETER); |
| 347 | return(0); |
| 348 | } |
| 349 | if(oldcb) |
| 350 | *oldcb = dso->name_converter; |
| 351 | dso->name_converter = cb; |
| 352 | return(1); |
| 353 | } |
| 354 | |
| 355 | const char *DSO_get_filename(DSO *dso) |
| 356 | { |
| 357 | if(dso == NULL) |
| 358 | { |
| 359 | DSOerr(DSO_F_DSO_GET_FILENAME,ERR_R_PASSED_NULL_PARAMETER); |
| 360 | return(NULL); |
| 361 | } |
| 362 | return(dso->filename); |
| 363 | } |
| 364 | |
| 365 | int DSO_set_filename(DSO *dso, const char *filename) |
| 366 | { |
| 367 | char *copied; |
| 368 | |
| 369 | if((dso == NULL) || (filename == NULL)) |
| 370 | { |
| 371 | DSOerr(DSO_F_DSO_SET_FILENAME,ERR_R_PASSED_NULL_PARAMETER); |
| 372 | return(0); |
| 373 | } |
| 374 | if(dso->loaded_filename) |
| 375 | { |
| 376 | DSOerr(DSO_F_DSO_SET_FILENAME,DSO_R_DSO_ALREADY_LOADED); |
| 377 | return(0); |
| 378 | } |
| 379 | /* We'll duplicate filename */ |
| 380 | copied = OPENSSL_malloc(strlen(filename) + 1); |
| 381 | if(copied == NULL) |
| 382 | { |
| 383 | DSOerr(DSO_F_DSO_SET_FILENAME,ERR_R_MALLOC_FAILURE); |
| 384 | return(0); |
| 385 | } |
| 386 | BUF_strlcpy(copied, filename, strlen(filename) + 1); |
| 387 | if(dso->filename) |
| 388 | OPENSSL_free(dso->filename); |
| 389 | dso->filename = copied; |
| 390 | return(1); |
| 391 | } |
| 392 | |
| 393 | char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2) |
| 394 | { |
| 395 | char *result = NULL; |
| 396 | |
| 397 | if(dso == NULL || filespec1 == NULL) |
| 398 | { |
| 399 | DSOerr(DSO_F_DSO_MERGE,ERR_R_PASSED_NULL_PARAMETER); |
| 400 | return(NULL); |
| 401 | } |
| 402 | if((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) |
| 403 | { |
| 404 | if(dso->merger != NULL) |
| 405 | result = dso->merger(dso, filespec1, filespec2); |
| 406 | else if(dso->meth->dso_merger != NULL) |
| 407 | result = dso->meth->dso_merger(dso, |
| 408 | filespec1, filespec2); |
| 409 | } |
| 410 | return(result); |
| 411 | } |
| 412 | |
| 413 | char *DSO_convert_filename(DSO *dso, const char *filename) |
| 414 | { |
| 415 | char *result = NULL; |
| 416 | |
| 417 | if(dso == NULL) |
| 418 | { |
| 419 | DSOerr(DSO_F_DSO_CONVERT_FILENAME,ERR_R_PASSED_NULL_PARAMETER); |
| 420 | return(NULL); |
| 421 | } |
| 422 | if(filename == NULL) |
| 423 | filename = dso->filename; |
| 424 | if(filename == NULL) |
| 425 | { |
| 426 | DSOerr(DSO_F_DSO_CONVERT_FILENAME,DSO_R_NO_FILENAME); |
| 427 | return(NULL); |
| 428 | } |
| 429 | if((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) |
| 430 | { |
| 431 | if(dso->name_converter != NULL) |
| 432 | result = dso->name_converter(dso, filename); |
| 433 | else if(dso->meth->dso_name_converter != NULL) |
| 434 | result = dso->meth->dso_name_converter(dso, filename); |
| 435 | } |
| 436 | if(result == NULL) |
| 437 | { |
| 438 | result = OPENSSL_malloc(strlen(filename) + 1); |
| 439 | if(result == NULL) |
| 440 | { |
| 441 | DSOerr(DSO_F_DSO_CONVERT_FILENAME, |
| 442 | ERR_R_MALLOC_FAILURE); |
| 443 | return(NULL); |
| 444 | } |
| 445 | BUF_strlcpy(result, filename, strlen(filename) + 1); |
| 446 | } |
| 447 | return(result); |
| 448 | } |
| 449 | |
| 450 | const char *DSO_get_loaded_filename(DSO *dso) |
| 451 | { |
| 452 | if(dso == NULL) |
| 453 | { |
| 454 | DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, |
| 455 | ERR_R_PASSED_NULL_PARAMETER); |
| 456 | return(NULL); |
| 457 | } |
| 458 | return(dso->loaded_filename); |
| 459 | } |
| 460 | |
| 461 | int DSO_pathbyaddr(void *addr,char *path,int sz) |
| 462 | { |
| 463 | DSO_METHOD *meth = default_DSO_meth; |
| 464 | if (meth == NULL) meth = DSO_METHOD_openssl(); |
| 465 | if (meth->pathbyaddr == NULL) |
| 466 | { |
| 467 | DSOerr(DSO_F_DSO_PATHBYADDR,DSO_R_UNSUPPORTED); |
| 468 | return -1; |
| 469 | } |
| 470 | return (*meth->pathbyaddr)(addr,path,sz); |
| 471 | } |
| 472 | |
| 473 | void *DSO_global_lookup(const char *name) |
| 474 | { |
| 475 | DSO_METHOD *meth = default_DSO_meth; |
| 476 | if (meth == NULL) meth = DSO_METHOD_openssl(); |
| 477 | if (meth->globallookup == NULL) |
| 478 | { |
| 479 | DSOerr(DSO_F_DSO_GLOBAL_LOOKUP,DSO_R_UNSUPPORTED); |
| 480 | return NULL; |
| 481 | } |
| 482 | return (*meth->globallookup)(name); |
| 483 | } |