apps/engine.c

   1 /* apps/engine.c -*- mode: C; c-file-style: "eay" -*- */
   2 /* Written by Richard Levitte <richard@levitte.org> 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 #ifndef OPENSSL_NO_ENGINE
  60
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <string.h>
  64 #ifdef OPENSSL_NO_STDIO
  65 #define APPS_WIN16
  66 #endif
  67 #include "apps.h"
  68 #include <openssl/err.h>
  69 #include <openssl/engine.h>
  70 #include <openssl/ssl.h>
  71
  72 #undef PROG
  73 #define PROG    engine_main
  74
  75 static char *engine_usage[]={
  76 "usage: engine opts [engine ...]\n",
  77 " -v[v[v[v]]] - verbose mode, for each engine, list its 'control commands'\n",
  78 "               -vv will additionally display each command's description\n",
  79 "               -vvv will also add the input flags for each command\n",
  80 "               -vvvv will also show internal input flags\n",
  81 " -c          - for each engine, also list the capabilities\n",
  82 " -t[t]       - for each engine, check that they are really available\n",
  83 "               -tt will display error trace for unavailable engines\n",
  84 " -pre <cmd>  - runs command 'cmd' against the ENGINE before any attempts\n",
  85 "               to load it (if -t is used)\n",
  86 " -post <cmd> - runs command 'cmd' against the ENGINE after loading it\n",
  87 "               (only used if -t is also provided)\n",
  88 " NB: -pre and -post will be applied to all ENGINEs supplied on the command\n",
  89 " line, or all supported ENGINEs if none are specified.\n",
  90 " Eg. '-pre \"SO_PATH:/lib/libdriver.so\"' calls command \"SO_PATH\" with\n",
  91 " argument \"/lib/libdriver.so\".\n",
  92 NULL
  93 };
  94
  95 static void identity(void *ptr)
  96         {
  97         return;
  98         }
  99
 100 static int append_buf(char **buf, const char *s, int *size, int step)
 101         {
 102         int l = strlen(s);
 103
 104         if (*buf == NULL)
 105                 {
 106                 *size = step;
 107                 *buf = OPENSSL_malloc(*size);
 108                 if (*buf == NULL)
 109                         return 0;
 110                 **buf = '\0';
 111                 }
 112
 113         if (**buf != '\0')
 114                 l += 2;         /* ", " */
 115
 116         if (strlen(*buf) + strlen(s) >= (unsigned int)*size)
 117                 {
 118                 *size += step;
 119                 *buf = OPENSSL_realloc(*buf, *size);
 120                 }
 121
 122         if (*buf == NULL)
 123                 return 0;
 124
 125         if (**buf != '\0')
 126                 BUF_strlcat(*buf, ", ", *size);
 127         BUF_strlcat(*buf, s, *size);
 128
 129         return 1;
 130         }
 131
 132 static int util_flags(BIO *bio_out, unsigned int flags, const char *indent)
 133         {
 134         int started = 0, err = 0;
 135         /* Indent before displaying input flags */
 136         BIO_printf(bio_out, "%s%s(input flags): ", indent, indent);
 137         if(flags == 0)
 138                 {
 139                 BIO_printf(bio_out, "<no flags>\n");
 140                 return 1;
 141                 }
 142         /* If the object is internal, mark it in a way that shows instead of
 143          * having it part of all the other flags, even if it really is. */
 144         if(flags & ENGINE_CMD_FLAG_INTERNAL)
 145                 {
 146                 BIO_printf(bio_out, "[Internal] ");
 147                 }
 148
 149         if(flags & ENGINE_CMD_FLAG_NUMERIC)
 150                 {
 151                 if(started)
 152                         {
 153                         BIO_printf(bio_out, "|");
 154                         err = 1;
 155                         }
 156                 BIO_printf(bio_out, "NUMERIC");
 157                 started = 1;
 158                 }
 159         /* Now we check that no combinations of the mutually exclusive NUMERIC,
 160          * STRING, and NO_INPUT flags have been used. Future flags that can be
 161          * OR'd together with these would need to added after these to preserve
 162          * the testing logic. */
 163         if(flags & ENGINE_CMD_FLAG_STRING)
 164                 {
 165                 if(started)
 166                         {
 167                         BIO_printf(bio_out, "|");
 168                         err = 1;
 169                         }
 170                 BIO_printf(bio_out, "STRING");
 171                 started = 1;
 172                 }
 173         if(flags & ENGINE_CMD_FLAG_NO_INPUT)
 174                 {
 175                 if(started)
 176                         {
 177                         BIO_printf(bio_out, "|");
 178                         err = 1;
 179                         }
 180                 BIO_printf(bio_out, "NO_INPUT");
 181                 started = 1;
 182                 }
 183         /* Check for unknown flags */
 184         flags = flags & ~ENGINE_CMD_FLAG_NUMERIC &
 185                         ~ENGINE_CMD_FLAG_STRING &
 186                         ~ENGINE_CMD_FLAG_NO_INPUT &
 187                         ~ENGINE_CMD_FLAG_INTERNAL;
 188         if(flags)
 189                 {
 190                 if(started) BIO_printf(bio_out, "|");
 191                 BIO_printf(bio_out, "<0x%04X>", flags);
 192                 }
 193         if(err)
 194                 BIO_printf(bio_out, "  <illegal flags!>");
 195         BIO_printf(bio_out, "\n");
 196         return 1;
 197         }
 198
 199 static int util_verbose(ENGINE *e, int verbose, BIO *bio_out, const char *indent)
 200         {
 201         static const int line_wrap = 78;
 202         int num;
 203         int ret = 0;
 204         char *name = NULL;
 205         char *desc = NULL;
 206         int flags;
 207         int xpos = 0;
 208         STACK *cmds = NULL;
 209         if(!ENGINE_ctrl(e, ENGINE_CTRL_HAS_CTRL_FUNCTION, 0, NULL, NULL) ||
 210                         ((num = ENGINE_ctrl(e, ENGINE_CTRL_GET_FIRST_CMD_TYPE,
 211                                         0, NULL, NULL)) <= 0))
 212                 {
 213 #if 0
 214                 BIO_printf(bio_out, "%s<no control commands>\n", indent);
 215 #endif
 216                 return 1;
 217                 }
 218
 219         cmds = sk_new_null();
 220
 221         if(!cmds)
 222                 goto err;
 223         do {
 224                 int len;
 225                 /* Get the command input flags */
 226                 if((flags = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FLAGS, num,
 227                                         NULL, NULL)) < 0)
 228                         goto err;
 229                 if (!(flags & ENGINE_CMD_FLAG_INTERNAL) || verbose >= 4)
 230                         {
 231                         /* Get the command name */
 232                         if((len = ENGINE_ctrl(e, ENGINE_CTRL_GET_NAME_LEN_FROM_CMD, num,
 233                                 NULL, NULL)) <= 0)
 234                                 goto err;
 235                         if((name = OPENSSL_malloc(len + 1)) == NULL)
 236                                 goto err;
 237                         if(ENGINE_ctrl(e, ENGINE_CTRL_GET_NAME_FROM_CMD, num, name,
 238                                 NULL) <= 0)
 239                                 goto err;
 240                         /* Get the command description */
 241                         if((len = ENGINE_ctrl(e, ENGINE_CTRL_GET_DESC_LEN_FROM_CMD, num,
 242                                 NULL, NULL)) < 0)
 243                                 goto err;
 244                         if(len > 0)
 245                                 {
 246                                 if((desc = OPENSSL_malloc(len + 1)) == NULL)
 247                                         goto err;
 248                                 if(ENGINE_ctrl(e, ENGINE_CTRL_GET_DESC_FROM_CMD, num, desc,
 249                                         NULL) <= 0)
 250                                         goto err;
 251                                 }
 252                         /* Now decide on the output */
 253                         if(xpos == 0)
 254                                 /* Do an indent */
 255                                 xpos = BIO_printf(bio_out, indent);
 256                         else
 257                                 /* Otherwise prepend a ", " */
 258                                 xpos += BIO_printf(bio_out, ", ");
 259                         if(verbose == 1)
 260                                 {
 261                                 /* We're just listing names, comma-delimited */
 262                                 if((xpos > (int)strlen(indent)) &&
 263                                         (xpos + (int)strlen(name) > line_wrap))
 264                                         {
 265                                         BIO_printf(bio_out, "\n");
 266                                         xpos = BIO_printf(bio_out, indent);
 267                                         }
 268                                 xpos += BIO_printf(bio_out, "%s", name);
 269                                 }
 270                         else
 271                                 {
 272                                 /* We're listing names plus descriptions */
 273                                 BIO_printf(bio_out, "%s: %s\n", name,
 274                                         (desc == NULL) ? "<no description>" : desc);
 275                                 /* ... and sometimes input flags */
 276                                 if((verbose >= 3) && !util_flags(bio_out, flags,
 277                                         indent))
 278                                         goto err;
 279                                 xpos = 0;
 280                                 }
 281                         }
 282                 OPENSSL_free(name); name = NULL;
 283                 if(desc) { OPENSSL_free(desc); desc = NULL; }
 284                 /* Move to the next command */
 285                 num = ENGINE_ctrl(e, ENGINE_CTRL_GET_NEXT_CMD_TYPE,
 286                                         num, NULL, NULL);
 287                 } while(num > 0);
 288         if(xpos > 0)
 289                 BIO_printf(bio_out, "\n");
 290         ret = 1;
 291 err:
 292         if(cmds) sk_pop_free(cmds, identity);
 293         if(name) OPENSSL_free(name);
 294         if(desc) OPENSSL_free(desc);
 295         return ret;
 296         }
 297
 298 static void util_do_cmds(ENGINE *e, STACK *cmds, BIO *bio_out, const char *indent)
 299         {
 300         int loop, res, num = sk_num(cmds);
 301         if(num < 0)
 302                 {
 303                 BIO_printf(bio_out, "[Error]: internal stack error\n");
 304                 return;
 305                 }
 306         for(loop = 0; loop < num; loop++)
 307                 {
 308                 char buf[256];
 309                 const char *cmd, *arg;
 310                 cmd = sk_value(cmds, loop);
 311                 res = 1; /* assume success */
 312                 /* Check if this command has no ":arg" */
 313                 if((arg = strstr(cmd, ":")) == NULL)
 314                         {
 315                         if(!ENGINE_ctrl_cmd_string(e, cmd, NULL, 0))
 316                                 res = 0;
 317                         }
 318                 else
 319                         {
 320                         if((int)(arg - cmd) > 254)
 321                                 {
 322                                 BIO_printf(bio_out,"[Error]: command name too long\n");
 323                                 return;
 324                                 }
 325                         memcpy(buf, cmd, (int)(arg - cmd));
 326                         buf[arg-cmd] = '\0';
 327                         arg++; /* Move past the ":" */
 328                         /* Call the command with the argument */
 329                         if(!ENGINE_ctrl_cmd_string(e, buf, arg, 0))
 330                                 res = 0;
 331                         }
 332                 if(res)
 333                         BIO_printf(bio_out, "[Success]: %s\n", cmd);
 334                 else
 335                         {
 336                         BIO_printf(bio_out, "[Failure]: %s\n", cmd);
 337                         ERR_print_errors(bio_out);
 338                         }
 339                 }
 340         }
 341
 342 int MAIN(int, char **);
 343
 344 int MAIN(int argc, char **argv)
 345         {
 346         int ret=1,i;
 347         char **pp;
 348         int verbose=0, list_cap=0, test_avail=0, test_avail_noise = 0;
 349         ENGINE *e;
 350         STACK *engines = sk_new_null();
 351         STACK *pre_cmds = sk_new_null();
 352         STACK *post_cmds = sk_new_null();
 353         int badops=1;
 354         BIO *bio_out=NULL;
 355         const char *indent = "     ";
 356
 357         apps_startup();
 358         SSL_load_error_strings();
 359
 360         if (bio_err == NULL)
 361                 bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
 362
 363         if (!load_config(bio_err, NULL))
 364                 goto end;
 365         bio_out=BIO_new_fp(stdout,BIO_NOCLOSE);
 366 #ifdef OPENSSL_SYS_VMS
 367         {
 368         BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 369         bio_out = BIO_push(tmpbio, bio_out);
 370         }
 371 #endif
 372
 373         argc--;
 374         argv++;
 375         while (argc >= 1)
 376                 {
 377                 if (strncmp(*argv,"-v",2) == 0)
 378                         {
 379                         if(strspn(*argv + 1, "v") < strlen(*argv + 1))
 380                                 goto skip_arg_loop;
 381                         if((verbose=strlen(*argv + 1)) > 4)
 382                                 goto skip_arg_loop;
 383                         }
 384                 else if (strcmp(*argv,"-c") == 0)
 385                         list_cap=1;
 386                 else if (strncmp(*argv,"-t",2) == 0)
 387                         {
 388                         test_avail=1;
 389                         if(strspn(*argv + 1, "t") < strlen(*argv + 1))
 390                                 goto skip_arg_loop;
 391                         if((test_avail_noise = strlen(*argv + 1) - 1) > 1)
 392                                 goto skip_arg_loop;
 393                         }
 394                 else if (strcmp(*argv,"-pre") == 0)
 395                         {
 396                         argc--; argv++;
 397                         sk_push(pre_cmds,*argv);
 398                         }
 399                 else if (strcmp(*argv,"-post") == 0)
 400                         {
 401                         argc--; argv++;
 402                         sk_push(post_cmds,*argv);
 403                         }
 404                 else if ((strncmp(*argv,"-h",2) == 0) ||
 405                                 (strcmp(*argv,"-?") == 0))
 406                         goto skip_arg_loop;
 407                 else
 408                         sk_push(engines,*argv);
 409                 argc--;
 410                 argv++;
 411                 }
 412         /* Looks like everything went OK */
 413         badops = 0;
 414 skip_arg_loop:
 415
 416         if (badops)
 417                 {
 418                 for (pp=engine_usage; (*pp != NULL); pp++)
 419                         BIO_printf(bio_err,"%s",*pp);
 420                 goto end;
 421                 }
 422
 423         if (sk_num(engines) == 0)
 424                 {
 425                 for(e = ENGINE_get_first(); e != NULL; e = ENGINE_get_next(e))
 426                         {
 427                         sk_push(engines,(char *)ENGINE_get_id(e));
 428                         }
 429                 }
 430
 431         for (i=0; i<sk_num(engines); i++)
 432                 {
 433                 const char *id = sk_value(engines,i);
 434                 if ((e = ENGINE_by_id(id)) != NULL)
 435                         {
 436                         const char *name = ENGINE_get_name(e);
 437                         /* Do "id" first, then "name". Easier to auto-parse. */
 438                         BIO_printf(bio_out, "(%s) %s\n", id, name);
 439                         util_do_cmds(e, pre_cmds, bio_out, indent);
 440                         if (strcmp(ENGINE_get_id(e), id) != 0)
 441                                 {
 442                                 BIO_printf(bio_out, "Loaded: (%s) %s\n",
 443                                         ENGINE_get_id(e), ENGINE_get_name(e));
 444                                 }
 445                         if (list_cap)
 446                                 {
 447                                 int cap_size = 256;
 448                                 char *cap_buf = NULL;
 449                                 int k,n;
 450                                 const int *nids;
 451                                 ENGINE_CIPHERS_PTR fn_c;
 452                                 ENGINE_DIGESTS_PTR fn_d;
 453
 454                                 if (ENGINE_get_RSA(e) != NULL
 455                                         && !append_buf(&cap_buf, "RSA",
 456                                                 &cap_size, 256))
 457                                         goto end;
 458                                 if (ENGINE_get_DSA(e) != NULL
 459                                         && !append_buf(&cap_buf, "DSA",
 460                                                 &cap_size, 256))
 461                                         goto end;
 462                                 if (ENGINE_get_DH(e) != NULL
 463                                         && !append_buf(&cap_buf, "DH",
 464                                                 &cap_size, 256))
 465                                         goto end;
 466                                 if (ENGINE_get_RAND(e) != NULL
 467                                         && !append_buf(&cap_buf, "RAND",
 468                                                 &cap_size, 256))
 469                                         goto end;
 470
 471                                 fn_c = ENGINE_get_ciphers(e);
 472                                 if(!fn_c) goto skip_ciphers;
 473                                 n = fn_c(e, NULL, &nids, 0);
 474                                 for(k=0 ; k < n ; ++k)
 475                                         if(!append_buf(&cap_buf,
 476                                                        OBJ_nid2sn(nids[k]),
 477                                                        &cap_size, 256))
 478                                                 goto end;
 479
 480 skip_ciphers:
 481                                 fn_d = ENGINE_get_digests(e);
 482                                 if(!fn_d) goto skip_digests;
 483                                 n = fn_d(e, NULL, &nids, 0);
 484                                 for(k=0 ; k < n ; ++k)
 485                                         if(!append_buf(&cap_buf,
 486                                                        OBJ_nid2sn(nids[k]),
 487                                                        &cap_size, 256))
 488                                                 goto end;
 489
 490 skip_digests:
 491                                 if (cap_buf && (*cap_buf != '\0'))
 492                                         BIO_printf(bio_out, " [%s]\n", cap_buf);
 493
 494                                 OPENSSL_free(cap_buf);
 495                                 }
 496                         if(test_avail)
 497                                 {
 498                                 BIO_printf(bio_out, "%s", indent);
 499                                 if (ENGINE_init(e))
 500                                         {
 501                                         BIO_printf(bio_out, "[ available ]\n");
 502                                         util_do_cmds(e, post_cmds, bio_out, indent);
 503                                         ENGINE_finish(e);
 504                                         }
 505                                 else
 506                                         {
 507                                         BIO_printf(bio_out, "[ unavailable ]\n");
 508                                         if(test_avail_noise)
 509                                                 ERR_print_errors_fp(stdout);
 510                                         ERR_clear_error();
 511                                         }
 512                                 }
 513                         if((verbose > 0) && !util_verbose(e, verbose, bio_out, indent))
 514                                 goto end;
 515                         ENGINE_free(e);
 516                         }
 517                 else
 518                         ERR_print_errors(bio_err);
 519                 }
 520
 521         ret=0;
 522 end:
 523
 524         ERR_print_errors(bio_err);
 525         sk_pop_free(engines, identity);
 526         sk_pop_free(pre_cmds, identity);
 527         sk_pop_free(post_cmds, identity);
 528         if (bio_out != NULL) BIO_free_all(bio_out);
 529         apps_shutdown();
 530         OPENSSL_EXIT(ret);
 531         }
 532 #else
 533
 534 # if PEDANTIC
 535 static void *dummy=&dummy;
 536 # endif
 537
 538 #endif