apps/openssl.c

   1 /*
   2  * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <internal/cryptlib.h>
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <stdlib.h>
  14 #include <openssl/bio.h>
  15 #include <openssl/crypto.h>
  16 #include <openssl/trace.h>
  17 #include <openssl/lhash.h>
  18 #include <openssl/conf.h>
  19 #include <openssl/x509.h>
  20 #include <openssl/pem.h>
  21 #include <openssl/ssl.h>
  22 #ifndef OPENSSL_NO_ENGINE
  23 # include <openssl/engine.h>
  24 #endif
  25 #include <openssl/err.h>
  26 /* Needed to get the other O_xxx flags. */
  27 #ifdef OPENSSL_SYS_VMS
  28 # include <unixio.h>
  29 #endif
  30 #include "apps.h"
  31 #include "progs.h"
  32
  33 /* Special sentinel to exit the program. */
  34 #define EXIT_THE_PROGRAM (-1)
  35
  36 /*
  37  * The LHASH callbacks ("hash" & "cmp") have been replaced by functions with
  38  * the base prototypes (we cast each variable inside the function to the
  39  * required type of "FUNCTION*"). This removes the necessity for
  40  * macro-generated wrapper functions.
  41  */
  42 static LHASH_OF(FUNCTION) *prog_init(void);
  43 static int do_cmd(LHASH_OF(FUNCTION) *prog, int argc, char *argv[]);
  44 char *default_config_file = NULL;
  45
  46 BIO *bio_in = NULL;
  47 BIO *bio_out = NULL;
  48 BIO *bio_err = NULL;
  49
  50 static void warn_deprecated(const FUNCTION *fp)
  51 {
  52     if (fp->deprecated_version != NULL)
  53         BIO_printf(bio_err, "The command %s was deprecated in version %s.",
  54                    fp->name, fp->deprecated_version);
  55     else
  56         BIO_printf(bio_err, "The command %s is deprecated.", fp->name);
  57     if (strcmp(fp->deprecated_alternative, DEPRECATED_NO_ALTERNATIVE) != 0)
  58         BIO_printf(bio_err, " Use '%s' instead.", fp->deprecated_alternative);
  59     BIO_printf(bio_err, "\n");
  60 }
  61
  62 static int apps_startup(void)
  63 {
  64 #ifdef SIGPIPE
  65     signal(SIGPIPE, SIG_IGN);
  66 #endif
  67
  68     /* Set non-default library initialisation settings */
  69     if (!OPENSSL_init_ssl(OPENSSL_INIT_ENGINE_ALL_BUILTIN
  70                           | OPENSSL_INIT_LOAD_CONFIG, NULL))
  71         return 0;
  72
  73     setup_ui_method();
  74
  75     return 1;
  76 }
  77
  78 static void apps_shutdown(void)
  79 {
  80     destroy_ui_method();
  81 }
  82
  83 static char *make_config_name(void)
  84 {
  85     const char *t;
  86     size_t len;
  87     char *p;
  88
  89     if ((t = getenv("OPENSSL_CONF")) != NULL)
  90         return OPENSSL_strdup(t);
  91
  92     t = X509_get_default_cert_area();
  93     len = strlen(t) + 1 + strlen(OPENSSL_CONF) + 1;
  94     p = app_malloc(len, "config filename buffer");
  95     strcpy(p, t);
  96 #ifndef OPENSSL_SYS_VMS
  97     strcat(p, "/");
  98 #endif
  99     strcat(p, OPENSSL_CONF);
 100
 101     return p;
 102 }
 103
 104
 105 #ifndef OPENSSL_NO_TRACE
 106 typedef struct tracedata_st {
 107     BIO *bio;
 108     unsigned int ingroup:1;
 109 } tracedata;
 110
 111 static size_t internal_trace_cb(const char *buf, size_t cnt,
 112                                 int category, int cmd, void *vdata)
 113 {
 114     int ret = 0;
 115     tracedata *trace_data = vdata;
 116     char buffer[256], *hex;
 117     CRYPTO_THREAD_ID tid;
 118
 119     switch (cmd) {
 120     case OSSL_TRACE_CTRL_BEGIN:
 121         if (!ossl_assert(!trace_data->ingroup))
 122             return 0;
 123         trace_data->ingroup = 1;
 124
 125         tid = CRYPTO_THREAD_get_current_id();
 126         hex = OPENSSL_buf2hexstr((const unsigned char *)&tid, sizeof(tid));
 127         BIO_snprintf(buffer, sizeof(buffer), "TRACE[%s]:%s: ",
 128                      hex == NULL ? "<null>" : hex,
 129                      OSSL_trace_get_category_name(category));
 130         OPENSSL_free(hex);
 131         BIO_set_prefix(trace_data->bio, buffer);
 132         break;
 133     case OSSL_TRACE_CTRL_WRITE:
 134         if (!ossl_assert(trace_data->ingroup))
 135             return 0;
 136
 137         ret = BIO_write(trace_data->bio, buf, cnt);
 138         break;
 139     case OSSL_TRACE_CTRL_END:
 140         if (!ossl_assert(trace_data->ingroup))
 141             return 0;
 142         trace_data->ingroup = 0;
 143
 144         BIO_set_prefix(trace_data->bio, NULL);
 145
 146         break;
 147     }
 148
 149     return ret < 0 ? 0 : ret;
 150 }
 151
 152 DEFINE_STACK_OF(tracedata)
 153 static STACK_OF(tracedata) *trace_data_stack;
 154
 155 static void tracedata_free(tracedata *data)
 156 {
 157     BIO_free_all(data->bio);
 158     OPENSSL_free(data);
 159 }
 160
 161 static STACK_OF(tracedata) *trace_data_stack;
 162
 163 static void cleanup_trace(void)
 164 {
 165     sk_tracedata_pop_free(trace_data_stack, tracedata_free);
 166 }
 167
 168 static void setup_trace_category(int category)
 169 {
 170     BIO *channel;
 171     tracedata *trace_data;
 172
 173     if (OSSL_trace_enabled(category))
 174         return;
 175
 176     channel = BIO_push(BIO_new(BIO_f_prefix()), dup_bio_err(FORMAT_TEXT));
 177     trace_data = OPENSSL_zalloc(sizeof(*trace_data));
 178
 179     if (trace_data == NULL
 180         || (trace_data->bio = channel) == NULL
 181         || OSSL_trace_set_callback(category, internal_trace_cb,
 182                                    trace_data) == 0
 183         || sk_tracedata_push(trace_data_stack, trace_data) == 0) {
 184
 185         fprintf(stderr,
 186                 "warning: unable to setup trace callback for category '%s'.\n",
 187                 OSSL_trace_get_category_name(category));
 188
 189         OSSL_trace_set_callback(category, NULL, NULL);
 190         BIO_free_all(channel);
 191     }
 192 }
 193
 194 static void setup_trace(const char *str)
 195 {
 196     char *val;
 197
 198     /*
 199      * We add this handler as early as possible to ensure it's executed
 200      * as late as possible, i.e. after the TRACE code has done its cleanup
 201      * (which happens last in OPENSSL_cleanup).
 202      */
 203     atexit(cleanup_trace);
 204
 205     trace_data_stack = sk_tracedata_new_null();
 206     val = OPENSSL_strdup(str);
 207
 208     if (val != NULL) {
 209         char *valp = val;
 210         char *item;
 211
 212         for (valp = val; (item = strtok(valp, ",")) != NULL; valp = NULL) {
 213             int category = OSSL_trace_get_category_num(item);
 214
 215             if (category == OSSL_TRACE_CATEGORY_ALL) {
 216                 while (++category < OSSL_TRACE_CATEGORY_NUM)
 217                     setup_trace_category(category);
 218                 break;
 219             } else if (category > 0) {
 220                 setup_trace_category(category);
 221             } else {
 222                 fprintf(stderr,
 223                         "warning: unknown trace category: '%s'.\n", item);
 224             }
 225         }
 226     }
 227
 228     OPENSSL_free(val);
 229 }
 230 #endif /* OPENSSL_NO_TRACE */
 231
 232 int main(int argc, char *argv[])
 233 {
 234     FUNCTION f, *fp;
 235     LHASH_OF(FUNCTION) *prog = NULL;
 236     char *p, *pname;
 237     char buf[1024];
 238     const char *prompt;
 239     ARGS arg;
 240     int first, n, i, ret = 0;
 241
 242     arg.argv = NULL;
 243     arg.size = 0;
 244
 245     /* Set up some of the environment. */
 246     default_config_file = make_config_name();
 247     bio_in = dup_bio_in(FORMAT_TEXT);
 248     bio_out = dup_bio_out(FORMAT_TEXT);
 249     bio_err = dup_bio_err(FORMAT_TEXT);
 250
 251 #if defined(OPENSSL_SYS_VMS) && defined(__DECC)
 252     argv = copy_argv(&argc, argv);
 253 #elif defined(_WIN32)
 254     /*
 255      * Replace argv[] with UTF-8 encoded strings.
 256      */
 257     win32_utf8argv(&argc, &argv);
 258 #endif
 259
 260 #ifndef OPENSSL_NO_TRACE
 261     setup_trace(getenv("OPENSSL_TRACE"));
 262 #endif
 263
 264     if (getenv("OPENSSL_FIPS")) {
 265         BIO_printf(bio_err, "FIPS mode not supported.\n");
 266         return 1;
 267     }
 268
 269     if (!apps_startup()) {
 270         BIO_printf(bio_err,
 271                    "FATAL: Startup failure (dev note: apps_startup() failed)\n");
 272         ERR_print_errors(bio_err);
 273         ret = 1;
 274         goto end;
 275     }
 276
 277     prog = prog_init();
 278     if (prog == NULL) {
 279         BIO_printf(bio_err,
 280                    "FATAL: Startup failure (dev note: prog_init() failed)\n");
 281         ERR_print_errors(bio_err);
 282         ret = 1;
 283         goto end;
 284     }
 285     pname = opt_progname(argv[0]);
 286
 287     /* first check the program name */
 288     f.name = pname;
 289     fp = lh_FUNCTION_retrieve(prog, &f);
 290     if (fp != NULL) {
 291         argv[0] = pname;
 292         if (fp->deprecated_alternative != NULL)
 293             warn_deprecated(fp);
 294         ret = fp->func(argc, argv);
 295         goto end;
 296     }
 297
 298     /* If there is stuff on the command line, run with that. */
 299     if (argc != 1) {
 300         argc--;
 301         argv++;
 302         ret = do_cmd(prog, argc, argv);
 303         if (ret < 0)
 304             ret = 0;
 305         goto end;
 306     }
 307
 308     /* ok, lets enter interactive mode */
 309     for (;;) {
 310         ret = 0;
 311         /* Read a line, continue reading if line ends with \ */
 312         for (p = buf, n = sizeof(buf), i = 0, first = 1; n > 0; first = 0) {
 313             prompt = first ? "OpenSSL> " : "> ";
 314             p[0] = '\0';
 315 #ifndef READLINE
 316             fputs(prompt, stdout);
 317             fflush(stdout);
 318             if (!fgets(p, n, stdin))
 319                 goto end;
 320             if (p[0] == '\0')
 321                 goto end;
 322             i = strlen(p);
 323             if (i <= 1)
 324                 break;
 325             if (p[i - 2] != '\\')
 326                 break;
 327             i -= 2;
 328             p += i;
 329             n -= i;
 330 #else
 331             {
 332                 extern char *readline(const char *);
 333                 extern void add_history(const char *cp);
 334                 char *text;
 335
 336                 text = readline(prompt);
 337                 if (text == NULL)
 338                     goto end;
 339                 i = strlen(text);
 340                 if (i == 0 || i > n)
 341                     break;
 342                 if (text[i - 1] != '\\') {
 343                     p += strlen(strcpy(p, text));
 344                     free(text);
 345                     add_history(buf);
 346                     break;
 347                 }
 348
 349                 text[i - 1] = '\0';
 350                 p += strlen(strcpy(p, text));
 351                 free(text);
 352                 n -= i;
 353             }
 354 #endif
 355         }
 356
 357         if (!chopup_args(&arg, buf)) {
 358             BIO_printf(bio_err, "Can't parse (no memory?)\n");
 359             break;
 360         }
 361
 362         ret = do_cmd(prog, arg.argc, arg.argv);
 363         if (ret == EXIT_THE_PROGRAM) {
 364             ret = 0;
 365             goto end;
 366         }
 367         if (ret != 0)
 368             BIO_printf(bio_err, "error in %s\n", arg.argv[0]);
 369         (void)BIO_flush(bio_out);
 370         (void)BIO_flush(bio_err);
 371     }
 372     ret = 1;
 373  end:
 374     app_providers_cleanup();
 375     OPENSSL_free(default_config_file);
 376     lh_FUNCTION_free(prog);
 377     OPENSSL_free(arg.argv);
 378     app_RAND_write();
 379
 380     BIO_free(bio_in);
 381     BIO_free_all(bio_out);
 382     apps_shutdown();
 383     BIO_free(bio_err);
 384     EXIT(ret);
 385 }
 386
 387 typedef enum HELP_CHOICE {
 388     OPT_hERR = -1, OPT_hEOF = 0, OPT_hHELP
 389 } HELP_CHOICE;
 390
 391 const OPTIONS help_options[] = {
 392     {OPT_HELP_STR, 1, '-', "Usage: help [options] [command]\n"},
 393
 394     OPT_SECTION("General"),
 395     {"help", OPT_hHELP, '-', "Display this summary"},
 396
 397     OPT_PARAMETERS(),
 398     {"command", 0, 0, "Name of command to display help (optional)"},
 399     {NULL}
 400 };
 401
 402
 403 int help_main(int argc, char **argv)
 404 {
 405     FUNCTION *fp;
 406     int i, nl;
 407     FUNC_TYPE tp;
 408     char *prog;
 409     HELP_CHOICE o;
 410     DISPLAY_COLUMNS dc;
 411
 412     prog = opt_init(argc, argv, help_options);
 413     while ((o = opt_next()) != OPT_hEOF) {
 414         switch (o) {
 415         case OPT_hERR:
 416         case OPT_hEOF:
 417             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 418             return 1;
 419         case OPT_hHELP:
 420             opt_help(help_options);
 421             return 0;
 422         }
 423     }
 424
 425     if (opt_num_rest() == 1) {
 426         char *new_argv[3];
 427
 428         new_argv[0] = opt_rest()[0];
 429         new_argv[1] = "--help";
 430         new_argv[2] = NULL;
 431         return do_cmd(prog_init(), 2, new_argv);
 432     }
 433     if (opt_num_rest() != 0) {
 434         BIO_printf(bio_err, "Usage: %s\n", prog);
 435         return 1;
 436     }
 437
 438     calculate_columns(functions, &dc);
 439     BIO_printf(bio_err, "Standard commands");
 440     i = 0;
 441     tp = FT_none;
 442     for (fp = functions; fp->name != NULL; fp++) {
 443         nl = 0;
 444         if (i++ % dc.columns == 0) {
 445             BIO_printf(bio_err, "\n");
 446             nl = 1;
 447         }
 448         if (fp->type != tp) {
 449             tp = fp->type;
 450             if (!nl)
 451                 BIO_printf(bio_err, "\n");
 452             if (tp == FT_md) {
 453                 i = 1;
 454                 BIO_printf(bio_err,
 455                            "\nMessage Digest commands (see the `dgst' command for more details)\n");
 456             } else if (tp == FT_cipher) {
 457                 i = 1;
 458                 BIO_printf(bio_err,
 459                            "\nCipher commands (see the `enc' command for more details)\n");
 460             }
 461         }
 462         BIO_printf(bio_err, "%-*s", dc.width, fp->name);
 463     }
 464     BIO_printf(bio_err, "\n\n");
 465     return 0;
 466 }
 467
 468 static int do_cmd(LHASH_OF(FUNCTION) *prog, int argc, char *argv[])
 469 {
 470     FUNCTION f, *fp;
 471
 472     if (argc <= 0 || argv[0] == NULL)
 473         return 0;
 474     f.name = argv[0];
 475     fp = lh_FUNCTION_retrieve(prog, &f);
 476     if (fp == NULL) {
 477         if (EVP_get_digestbyname(argv[0])) {
 478             f.type = FT_md;
 479             f.func = dgst_main;
 480             fp = &f;
 481         } else if (EVP_get_cipherbyname(argv[0])) {
 482             f.type = FT_cipher;
 483             f.func = enc_main;
 484             fp = &f;
 485         }
 486     }
 487     if (fp != NULL) {
 488         if (fp->deprecated_alternative != NULL)
 489             warn_deprecated(fp);
 490         return fp->func(argc, argv);
 491     }
 492     if ((strncmp(argv[0], "no-", 3)) == 0) {
 493         /*
 494          * User is asking if foo is unsupported, by trying to "run" the
 495          * no-foo command.  Strange.
 496          */
 497         f.name = argv[0] + 3;
 498         if (lh_FUNCTION_retrieve(prog, &f) == NULL) {
 499             BIO_printf(bio_out, "%s\n", argv[0]);
 500             return 0;
 501         }
 502         BIO_printf(bio_out, "%s\n", argv[0] + 3);
 503         return 1;
 504     }
 505     if (strcmp(argv[0], "quit") == 0 || strcmp(argv[0], "q") == 0 ||
 506         strcmp(argv[0], "exit") == 0 || strcmp(argv[0], "bye") == 0)
 507         /* Special value to mean "exit the program. */
 508         return EXIT_THE_PROGRAM;
 509
 510     BIO_printf(bio_err, "Invalid command '%s'; type \"help\" for a list.\n",
 511                argv[0]);
 512     return 1;
 513 }
 514
 515 static int function_cmp(const FUNCTION * a, const FUNCTION * b)
 516 {
 517     return strncmp(a->name, b->name, 8);
 518 }
 519
 520 static unsigned long function_hash(const FUNCTION * a)
 521 {
 522     return OPENSSL_LH_strhash(a->name);
 523 }
 524
 525 static int SortFnByName(const void *_f1, const void *_f2)
 526 {
 527     const FUNCTION *f1 = _f1;
 528     const FUNCTION *f2 = _f2;
 529
 530     if (f1->type != f2->type)
 531         return f1->type - f2->type;
 532     return strcmp(f1->name, f2->name);
 533 }
 534
 535 static LHASH_OF(FUNCTION) *prog_init(void)
 536 {
 537     static LHASH_OF(FUNCTION) *ret = NULL;
 538     static int prog_inited = 0;
 539     FUNCTION *f;
 540     size_t i;
 541
 542     if (prog_inited)
 543         return ret;
 544
 545     prog_inited = 1;
 546
 547     /* Sort alphabetically within category. For nicer help displays. */
 548     for (i = 0, f = functions; f->name != NULL; ++f, ++i)
 549         ;
 550     qsort(functions, i, sizeof(*functions), SortFnByName);
 551
 552     if ((ret = lh_FUNCTION_new(function_hash, function_cmp)) == NULL)
 553         return NULL;
 554
 555     for (f = functions; f->name != NULL; f++)
 556         (void)lh_FUNCTION_insert(ret, f);
 557     return ret;
 558 }