apps/engine.c

   1 /* apps/engine.c -*- mode: C; c-file-style: "eay" -*- */
   2 /*
   3  * Written by Richard Levitte <richard@levitte.org> for the OpenSSL project
   4  * 2000.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include <stdio.h>
  61 #include <stdlib.h>
  62 #include <string.h>
  63 #ifdef OPENSSL_NO_STDIO
  64 # define APPS_WIN16
  65 #endif
  66 #include "apps.h"
  67 #include <openssl/err.h>
  68 #ifndef OPENSSL_NO_ENGINE
  69 # include <openssl/engine.h>
  70 # include <openssl/ssl.h>
  71
  72 # undef PROG
  73 # define PROG    engine_main
  74
  75 static const 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         *size = step;
 106         *buf = OPENSSL_malloc(*size);
 107         if (*buf == NULL)
 108             return 0;
 109         **buf = '\0';
 110     }
 111
 112     if (**buf != '\0')
 113         l += 2;                 /* ", " */
 114
 115     if (strlen(*buf) + strlen(s) >= (unsigned int)*size) {
 116         *size += step;
 117         *buf = OPENSSL_realloc(*buf, *size);
 118     }
 119
 120     if (*buf == NULL)
 121         return 0;
 122
 123     if (**buf != '\0')
 124         BUF_strlcat(*buf, ", ", *size);
 125     BUF_strlcat(*buf, s, *size);
 126
 127     return 1;
 128 }
 129
 130 static int util_flags(BIO *bio_out, unsigned int flags, const char *indent)
 131 {
 132     int started = 0, err = 0;
 133     /* Indent before displaying input flags */
 134     BIO_printf(bio_out, "%s%s(input flags): ", indent, indent);
 135     if (flags == 0) {
 136         BIO_printf(bio_out, "<no flags>\n");
 137         return 1;
 138     }
 139     /*
 140      * If the object is internal, mark it in a way that shows instead of
 141      * having it part of all the other flags, even if it really is.
 142      */
 143     if (flags & ENGINE_CMD_FLAG_INTERNAL) {
 144         BIO_printf(bio_out, "[Internal] ");
 145     }
 146
 147     if (flags & ENGINE_CMD_FLAG_NUMERIC) {
 148         if (started) {
 149             BIO_printf(bio_out, "|");
 150             err = 1;
 151         }
 152         BIO_printf(bio_out, "NUMERIC");
 153         started = 1;
 154     }
 155     /*
 156      * Now we check that no combinations of the mutually exclusive NUMERIC,
 157      * STRING, and NO_INPUT flags have been used. Future flags that can be
 158      * OR'd together with these would need to added after these to preserve
 159      * the testing logic.
 160      */
 161     if (flags & ENGINE_CMD_FLAG_STRING) {
 162         if (started) {
 163             BIO_printf(bio_out, "|");
 164             err = 1;
 165         }
 166         BIO_printf(bio_out, "STRING");
 167         started = 1;
 168     }
 169     if (flags & ENGINE_CMD_FLAG_NO_INPUT) {
 170         if (started) {
 171             BIO_printf(bio_out, "|");
 172             err = 1;
 173         }
 174         BIO_printf(bio_out, "NO_INPUT");
 175         started = 1;
 176     }
 177     /* Check for unknown flags */
 178     flags = flags & ~ENGINE_CMD_FLAG_NUMERIC &
 179         ~ENGINE_CMD_FLAG_STRING &
 180         ~ENGINE_CMD_FLAG_NO_INPUT & ~ENGINE_CMD_FLAG_INTERNAL;
 181     if (flags) {
 182         if (started)
 183             BIO_printf(bio_out, "|");
 184         BIO_printf(bio_out, "<0x%04X>", flags);
 185     }
 186     if (err)
 187         BIO_printf(bio_out, "  <illegal flags!>");
 188     BIO_printf(bio_out, "\n");
 189     return 1;
 190 }
 191
 192 static int util_verbose(ENGINE *e, int verbose, BIO *bio_out,
 193                         const char *indent)
 194 {
 195     static const int line_wrap = 78;
 196     int num;
 197     int ret = 0;
 198     char *name = NULL;
 199     char *desc = NULL;
 200     int flags;
 201     int xpos = 0;
 202     STACK *cmds = NULL;
 203     if (!ENGINE_ctrl(e, ENGINE_CTRL_HAS_CTRL_FUNCTION, 0, NULL, NULL) ||
 204         ((num = ENGINE_ctrl(e, ENGINE_CTRL_GET_FIRST_CMD_TYPE,
 205                             0, NULL, NULL)) <= 0)) {
 206 # if 0
 207         BIO_printf(bio_out, "%s<no control commands>\n", indent);
 208 # endif
 209         return 1;
 210     }
 211
 212     cmds = sk_new_null();
 213
 214     if (!cmds)
 215         goto err;
 216     do {
 217         int len;
 218         /* Get the command input flags */
 219         if ((flags = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FLAGS, num,
 220                                  NULL, NULL)) < 0)
 221             goto err;
 222         if (!(flags & ENGINE_CMD_FLAG_INTERNAL) || verbose >= 4) {
 223             /* Get the command name */
 224             if ((len = ENGINE_ctrl(e, ENGINE_CTRL_GET_NAME_LEN_FROM_CMD, num,
 225                                    NULL, NULL)) <= 0)
 226                 goto err;
 227             if ((name = OPENSSL_malloc(len + 1)) == NULL)
 228                 goto err;
 229             if (ENGINE_ctrl(e, ENGINE_CTRL_GET_NAME_FROM_CMD, num, name,
 230                             NULL) <= 0)
 231                 goto err;
 232             /* Get the command description */
 233             if ((len = ENGINE_ctrl(e, ENGINE_CTRL_GET_DESC_LEN_FROM_CMD, num,
 234                                    NULL, NULL)) < 0)
 235                 goto err;
 236             if (len > 0) {
 237                 if ((desc = OPENSSL_malloc(len + 1)) == NULL)
 238                     goto err;
 239                 if (ENGINE_ctrl(e, ENGINE_CTRL_GET_DESC_FROM_CMD, num, desc,
 240                                 NULL) <= 0)
 241                     goto err;
 242             }
 243             /* Now decide on the output */
 244             if (xpos == 0)
 245                 /* Do an indent */
 246                 xpos = BIO_puts(bio_out, indent);
 247             else
 248                 /* Otherwise prepend a ", " */
 249                 xpos += BIO_printf(bio_out, ", ");
 250             if (verbose == 1) {
 251                 /*
 252                  * We're just listing names, comma-delimited
 253                  */
 254                 if ((xpos > (int)strlen(indent)) &&
 255                     (xpos + (int)strlen(name) > line_wrap)) {
 256                     BIO_printf(bio_out, "\n");
 257                     xpos = BIO_puts(bio_out, indent);
 258                 }
 259                 xpos += BIO_printf(bio_out, "%s", name);
 260             } else {
 261                 /* We're listing names plus descriptions */
 262                 BIO_printf(bio_out, "%s: %s\n", name,
 263                            (desc == NULL) ? "<no description>" : desc);
 264                 /* ... and sometimes input flags */
 265                 if ((verbose >= 3) && !util_flags(bio_out, flags, indent))
 266                     goto err;
 267                 xpos = 0;
 268             }
 269         }
 270         OPENSSL_free(name);
 271         name = NULL;
 272         if (desc) {
 273             OPENSSL_free(desc);
 274             desc = NULL;
 275         }
 276         /* Move to the next command */
 277         num = ENGINE_ctrl(e, ENGINE_CTRL_GET_NEXT_CMD_TYPE, num, NULL, NULL);
 278     } while (num > 0);
 279     if (xpos > 0)
 280         BIO_printf(bio_out, "\n");
 281     ret = 1;
 282  err:
 283     if (cmds)
 284         sk_pop_free(cmds, identity);
 285     if (name)
 286         OPENSSL_free(name);
 287     if (desc)
 288         OPENSSL_free(desc);
 289     return ret;
 290 }
 291
 292 static void util_do_cmds(ENGINE *e, STACK * cmds, BIO *bio_out,
 293                          const char *indent)
 294 {
 295     int loop, res, num = sk_num(cmds);
 296     if (num < 0) {
 297         BIO_printf(bio_out, "[Error]: internal stack error\n");
 298         return;
 299     }
 300     for (loop = 0; loop < num; loop++) {
 301         char buf[256];
 302         const char *cmd, *arg;
 303         cmd = sk_value(cmds, loop);
 304         res = 1;                /* assume success */
 305         /* Check if this command has no ":arg" */
 306         if ((arg = strstr(cmd, ":")) == NULL) {
 307             if (!ENGINE_ctrl_cmd_string(e, cmd, NULL, 0))
 308                 res = 0;
 309         } else {
 310             if ((int)(arg - cmd) > 254) {
 311                 BIO_printf(bio_out, "[Error]: command name too long\n");
 312                 return;
 313             }
 314             memcpy(buf, cmd, (int)(arg - cmd));
 315             buf[arg - cmd] = '\0';
 316             arg++;              /* Move past the ":" */
 317             /* Call the command with the argument */
 318             if (!ENGINE_ctrl_cmd_string(e, buf, arg, 0))
 319                 res = 0;
 320         }
 321         if (res)
 322             BIO_printf(bio_out, "[Success]: %s\n", cmd);
 323         else {
 324             BIO_printf(bio_out, "[Failure]: %s\n", cmd);
 325             ERR_print_errors(bio_out);
 326         }
 327     }
 328 }
 329
 330 int MAIN(int, char **);
 331
 332 int MAIN(int argc, char **argv)
 333 {
 334     int ret = 1, i;
 335     const char **pp;
 336     int verbose = 0, list_cap = 0, test_avail = 0, test_avail_noise = 0;
 337     ENGINE *e;
 338     STACK *engines = sk_new_null();
 339     STACK *pre_cmds = sk_new_null();
 340     STACK *post_cmds = sk_new_null();
 341     int badops = 1;
 342     BIO *bio_out = NULL;
 343     const char *indent = "     ";
 344
 345     apps_startup();
 346     SSL_load_error_strings();
 347
 348     if (bio_err == NULL)
 349         bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
 350
 351     if (!load_config(bio_err, NULL))
 352         goto end;
 353     bio_out = BIO_new_fp(stdout, BIO_NOCLOSE);
 354 # ifdef OPENSSL_SYS_VMS
 355     {
 356         BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 357         bio_out = BIO_push(tmpbio, bio_out);
 358     }
 359 # endif
 360
 361     argc--;
 362     argv++;
 363     while (argc >= 1) {
 364         if (strncmp(*argv, "-v", 2) == 0) {
 365             if (strspn(*argv + 1, "v") < strlen(*argv + 1))
 366                 goto skip_arg_loop;
 367             if ((verbose = strlen(*argv + 1)) > 4)
 368                 goto skip_arg_loop;
 369         } else if (strcmp(*argv, "-c") == 0)
 370             list_cap = 1;
 371         else if (strncmp(*argv, "-t", 2) == 0) {
 372             test_avail = 1;
 373             if (strspn(*argv + 1, "t") < strlen(*argv + 1))
 374                 goto skip_arg_loop;
 375             if ((test_avail_noise = strlen(*argv + 1) - 1) > 1)
 376                 goto skip_arg_loop;
 377         } else if (strcmp(*argv, "-pre") == 0) {
 378             argc--;
 379             argv++;
 380             if (argc == 0)
 381                 goto skip_arg_loop;
 382             sk_push(pre_cmds, *argv);
 383         } else if (strcmp(*argv, "-post") == 0) {
 384             argc--;
 385             argv++;
 386             if (argc == 0)
 387                 goto skip_arg_loop;
 388             sk_push(post_cmds, *argv);
 389         } else if ((strncmp(*argv, "-h", 2) == 0) ||
 390                    (strcmp(*argv, "-?") == 0))
 391             goto skip_arg_loop;
 392         else
 393             sk_push(engines, *argv);
 394         argc--;
 395         argv++;
 396     }
 397     /* Looks like everything went OK */
 398     badops = 0;
 399  skip_arg_loop:
 400
 401     if (badops) {
 402         for (pp = engine_usage; (*pp != NULL); pp++)
 403             BIO_printf(bio_err, "%s", *pp);
 404         goto end;
 405     }
 406
 407     if (sk_num(engines) == 0) {
 408         for (e = ENGINE_get_first(); e != NULL; e = ENGINE_get_next(e)) {
 409             sk_push(engines, (char *)ENGINE_get_id(e));
 410         }
 411     }
 412
 413     for (i = 0; i < sk_num(engines); i++) {
 414         const char *id = sk_value(engines, i);
 415         if ((e = ENGINE_by_id(id)) != NULL) {
 416             const char *name = ENGINE_get_name(e);
 417             /*
 418              * Do "id" first, then "name". Easier to auto-parse.
 419              */
 420             BIO_printf(bio_out, "(%s) %s\n", id, name);
 421             util_do_cmds(e, pre_cmds, bio_out, indent);
 422             if (strcmp(ENGINE_get_id(e), id) != 0) {
 423                 BIO_printf(bio_out, "Loaded: (%s) %s\n",
 424                            ENGINE_get_id(e), ENGINE_get_name(e));
 425             }
 426             if (list_cap) {
 427                 int cap_size = 256;
 428                 char *cap_buf = NULL;
 429                 int k, n;
 430                 const int *nids;
 431                 ENGINE_CIPHERS_PTR fn_c;
 432                 ENGINE_DIGESTS_PTR fn_d;
 433
 434                 if (ENGINE_get_RSA(e) != NULL
 435                     && !append_buf(&cap_buf, "RSA", &cap_size, 256))
 436                     goto end;
 437                 if (ENGINE_get_DSA(e) != NULL
 438                     && !append_buf(&cap_buf, "DSA", &cap_size, 256))
 439                     goto end;
 440                 if (ENGINE_get_DH(e) != NULL
 441                     && !append_buf(&cap_buf, "DH", &cap_size, 256))
 442                     goto end;
 443                 if (ENGINE_get_RAND(e) != NULL
 444                     && !append_buf(&cap_buf, "RAND", &cap_size, 256))
 445                     goto end;
 446
 447                 fn_c = ENGINE_get_ciphers(e);
 448                 if (!fn_c)
 449                     goto skip_ciphers;
 450                 n = fn_c(e, NULL, &nids, 0);
 451                 for (k = 0; k < n; ++k)
 452                     if (!append_buf(&cap_buf,
 453                                     OBJ_nid2sn(nids[k]), &cap_size, 256))
 454                         goto end;
 455
 456  skip_ciphers:
 457                 fn_d = ENGINE_get_digests(e);
 458                 if (!fn_d)
 459                     goto skip_digests;
 460                 n = fn_d(e, NULL, &nids, 0);
 461                 for (k = 0; k < n; ++k)
 462                     if (!append_buf(&cap_buf,
 463                                     OBJ_nid2sn(nids[k]), &cap_size, 256))
 464                         goto end;
 465
 466  skip_digests:
 467                 if (cap_buf && (*cap_buf != '\0'))
 468                     BIO_printf(bio_out, " [%s]\n", cap_buf);
 469
 470                 OPENSSL_free(cap_buf);
 471             }
 472             if (test_avail) {
 473                 BIO_printf(bio_out, "%s", indent);
 474                 if (ENGINE_init(e)) {
 475                     BIO_printf(bio_out, "[ available ]\n");
 476                     util_do_cmds(e, post_cmds, bio_out, indent);
 477                     ENGINE_finish(e);
 478                 } else {
 479                     BIO_printf(bio_out, "[ unavailable ]\n");
 480                     if (test_avail_noise)
 481                         ERR_print_errors_fp(stdout);
 482                     ERR_clear_error();
 483                 }
 484             }
 485             if ((verbose > 0) && !util_verbose(e, verbose, bio_out, indent))
 486                 goto end;
 487             ENGINE_free(e);
 488         } else
 489             ERR_print_errors(bio_err);
 490     }
 491
 492     ret = 0;
 493  end:
 494
 495     ERR_print_errors(bio_err);
 496     sk_pop_free(engines, identity);
 497     sk_pop_free(pre_cmds, identity);
 498     sk_pop_free(post_cmds, identity);
 499     if (bio_out != NULL)
 500         BIO_free_all(bio_out);
 501     apps_shutdown();
 502     OPENSSL_EXIT(ret);
 503 }
 504 #else
 505
 506 # if PEDANTIC
 507 static void *dummy = &dummy;
 508 # endif
 509
 510 #endif