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 <stdio.h>
  11 #include <string.h>
  12 #include <stdlib.h>
  13 #include <openssl/bio.h>
  14 #include <openssl/crypto.h>
  15 #include <openssl/trace.h>
  16 #include <openssl/lhash.h>
  17 #include <openssl/conf.h>
  18 #include <openssl/x509.h>
  19 #include <openssl/pem.h>
  20 #include <openssl/ssl.h>
  21 #ifndef OPENSSL_NO_ENGINE
  22 # include <openssl/engine.h>
  23 #endif
  24 #include <openssl/err.h>
  25 /* Needed to get the other O_xxx flags. */
  26 #ifdef OPENSSL_SYS_VMS
  27 # include <unixio.h>
  28 #endif
  29 #include "apps.h"
  30 #include "progs.h"
  31
  32 /*
  33  * The LHASH callbacks ("hash" & "cmp") have been replaced by functions with
  34  * the base prototypes (we cast each variable inside the function to the
  35  * required type of "FUNCTION*"). This removes the necessity for
  36  * macro-generated wrapper functions.
  37  */
  38 static LHASH_OF(FUNCTION) *prog_init(void);
  39 static int do_cmd(LHASH_OF(FUNCTION) *prog, int argc, char *argv[]);
  40 char *default_config_file = NULL;
  41
  42 BIO *bio_in = NULL;
  43 BIO *bio_out = NULL;
  44 BIO *bio_err = NULL;
  45
  46 static void warn_deprecated(const FUNCTION *fp)
  47 {
  48     if (fp->deprecated_version != NULL)
  49         BIO_printf(bio_err, "The command %s was deprecated in version %s.",
  50                    fp->name, fp->deprecated_version);
  51     else
  52         BIO_printf(bio_err, "The command %s is deprecated.", fp->name);
  53     if (strcmp(fp->deprecated_alternative, DEPRECATED_NO_ALTERNATIVE) != 0)
  54         BIO_printf(bio_err, " Use '%s' instead.", fp->deprecated_alternative);
  55     BIO_printf(bio_err, "\n");
  56 }
  57
  58 static int apps_startup(void)
  59 {
  60     const char *use_libctx = NULL;
  61 #ifdef SIGPIPE
  62     signal(SIGPIPE, SIG_IGN);
  63 #endif
  64
  65     /* Set non-default library initialisation settings */
  66     if (!OPENSSL_init_ssl(OPENSSL_INIT_ENGINE_ALL_BUILTIN
  67                           | OPENSSL_INIT_LOAD_CONFIG, NULL))
  68         return 0;
  69
  70     (void)setup_ui_method();
  71     (void)setup_engine_loader();
  72
  73     /*
  74      * NOTE: This is an undocumented feature required for testing only.
  75      * There are no guarantees that it will exist in future builds.
  76      */
  77     use_libctx = getenv("OPENSSL_TEST_LIBCTX");
  78     if (use_libctx != NULL) {
  79         /* Set this to "1" to create a global libctx */
  80         if (strcmp(use_libctx, "1") == 0) {
  81             if (app_create_libctx() == NULL)
  82                 return 0;
  83         }
  84     }
  85
  86     return 1;
  87 }
  88
  89 static void apps_shutdown(void)
  90 {
  91     app_providers_cleanup();
  92     OSSL_LIB_CTX_free(app_get0_libctx());
  93     destroy_engine_loader();
  94     destroy_ui_method();
  95 }
  96
  97
  98 #ifndef OPENSSL_NO_TRACE
  99 typedef struct tracedata_st {
 100     BIO *bio;
 101     unsigned int ingroup:1;
 102 } tracedata;
 103
 104 static size_t internal_trace_cb(const char *buf, size_t cnt,
 105                                 int category, int cmd, void *vdata)
 106 {
 107     int ret = 0;
 108     tracedata *trace_data = vdata;
 109     char buffer[256], *hex;
 110     CRYPTO_THREAD_ID tid;
 111
 112     switch (cmd) {
 113     case OSSL_TRACE_CTRL_BEGIN:
 114         if (trace_data->ingroup) {
 115             BIO_printf(bio_err, "ERROR: tracing already started\n");
 116             return 0;
 117         }
 118         trace_data->ingroup = 1;
 119
 120         tid = CRYPTO_THREAD_get_current_id();
 121         hex = OPENSSL_buf2hexstr((const unsigned char *)&tid, sizeof(tid));
 122         BIO_snprintf(buffer, sizeof(buffer), "TRACE[%s]:%s: ",
 123                      hex == NULL ? "<null>" : hex,
 124                      OSSL_trace_get_category_name(category));
 125         OPENSSL_free(hex);
 126         BIO_set_prefix(trace_data->bio, buffer);
 127         break;
 128     case OSSL_TRACE_CTRL_WRITE:
 129         if (!trace_data->ingroup) {
 130             BIO_printf(bio_err, "ERROR: writing when tracing not started\n");
 131             return 0;
 132         }
 133
 134         ret = BIO_write(trace_data->bio, buf, cnt);
 135         break;
 136     case OSSL_TRACE_CTRL_END:
 137         if (!trace_data->ingroup) {
 138             BIO_printf(bio_err, "ERROR: finishing when tracing not started\n");
 139             return 0;
 140         }
 141         trace_data->ingroup = 0;
 142
 143         BIO_set_prefix(trace_data->bio, NULL);
 144
 145         break;
 146     }
 147
 148     return ret < 0 ? 0 : ret;
 149 }
 150
 151 DEFINE_STACK_OF(tracedata)
 152 static STACK_OF(tracedata) *trace_data_stack;
 153
 154 static void tracedata_free(tracedata *data)
 155 {
 156     BIO_free_all(data->bio);
 157     OPENSSL_free(data);
 158 }
 159
 160 static STACK_OF(tracedata) *trace_data_stack;
 161
 162 static void cleanup_trace(void)
 163 {
 164     sk_tracedata_pop_free(trace_data_stack, tracedata_free);
 165 }
 166
 167 static void setup_trace_category(int category)
 168 {
 169     BIO *channel;
 170     tracedata *trace_data;
 171
 172     if (OSSL_trace_enabled(category))
 173         return;
 174
 175     channel = BIO_push(BIO_new(BIO_f_prefix()), dup_bio_err(FORMAT_TEXT));
 176     trace_data = OPENSSL_zalloc(sizeof(*trace_data));
 177
 178     if (trace_data == NULL
 179         || (trace_data->bio = channel) == NULL
 180         || OSSL_trace_set_callback(category, internal_trace_cb,
 181                                    trace_data) == 0
 182         || sk_tracedata_push(trace_data_stack, trace_data) == 0) {
 183
 184         fprintf(stderr,
 185                 "warning: unable to setup trace callback for category '%s'.\n",
 186                 OSSL_trace_get_category_name(category));
 187
 188         OSSL_trace_set_callback(category, NULL, NULL);
 189         BIO_free_all(channel);
 190     }
 191 }
 192
 193 static void setup_trace(const char *str)
 194 {
 195     char *val;
 196
 197     /*
 198      * We add this handler as early as possible to ensure it's executed
 199      * as late as possible, i.e. after the TRACE code has done its cleanup
 200      * (which happens last in OPENSSL_cleanup).
 201      */
 202     atexit(cleanup_trace);
 203
 204     trace_data_stack = sk_tracedata_new_null();
 205     val = OPENSSL_strdup(str);
 206
 207     if (val != NULL) {
 208         char *valp = val;
 209         char *item;
 210
 211         for (valp = val; (item = strtok(valp, ",")) != NULL; valp = NULL) {
 212             int category = OSSL_trace_get_category_num(item);
 213
 214             if (category == OSSL_TRACE_CATEGORY_ALL) {
 215                 while (++category < OSSL_TRACE_CATEGORY_NUM)
 216                     setup_trace_category(category);
 217                 break;
 218             } else if (category > 0) {
 219                 setup_trace_category(category);
 220             } else {
 221                 fprintf(stderr,
 222                         "warning: unknown trace category: '%s'.\n", item);
 223             }
 224         }
 225     }
 226
 227     OPENSSL_free(val);
 228 }
 229 #endif /* OPENSSL_NO_TRACE */
 230
 231 static char *help_argv[] = { "help", NULL };
 232
 233 int main(int argc, char *argv[])
 234 {
 235     FUNCTION f, *fp;
 236     LHASH_OF(FUNCTION) *prog = NULL;
 237     char *pname;
 238     ARGS arg;
 239     int ret = 0;
 240
 241     arg.argv = NULL;
 242     arg.size = 0;
 243
 244     /* Set up some of the environment. */
 245     bio_in = dup_bio_in(FORMAT_TEXT);
 246     bio_out = dup_bio_out(FORMAT_TEXT);
 247     bio_err = dup_bio_err(FORMAT_TEXT);
 248
 249 #if defined(OPENSSL_SYS_VMS) && defined(__DECC)
 250     argv = copy_argv(&argc, argv);
 251 #elif defined(_WIN32)
 252     /*
 253      * Replace argv[] with UTF-8 encoded strings.
 254      */
 255     win32_utf8argv(&argc, &argv);
 256 #endif
 257
 258 #ifndef OPENSSL_NO_TRACE
 259     setup_trace(getenv("OPENSSL_TRACE"));
 260 #endif
 261
 262     if (!apps_startup()) {
 263         BIO_printf(bio_err,
 264                    "FATAL: Startup failure (dev note: apps_startup() failed)\n");
 265         ERR_print_errors(bio_err);
 266         ret = 1;
 267         goto end;
 268     }
 269
 270     prog = prog_init();
 271     if (prog == NULL) {
 272         BIO_printf(bio_err,
 273                    "FATAL: Startup failure (dev note: prog_init() failed)\n");
 274         ERR_print_errors(bio_err);
 275         ret = 1;
 276         goto end;
 277     }
 278     pname = opt_progname(argv[0]);
 279
 280     default_config_file = CONF_get1_default_config_file();
 281     if (default_config_file == NULL)
 282         app_bail_out("%s: could not get default config file\n", pname);
 283
 284     /* first check the program name */
 285     f.name = pname;
 286     fp = lh_FUNCTION_retrieve(prog, &f);
 287     if (fp == NULL) {
 288         /* We assume we've been called as 'openssl cmd' */
 289         argc--;
 290         argv++;
 291     }
 292
 293     /* If there's a command, run with that, otherwise "help". */
 294     ret = argc > 0
 295         ? do_cmd(prog, argc, argv)
 296         : do_cmd(prog, 1, help_argv);
 297
 298  end:
 299     OPENSSL_free(default_config_file);
 300     lh_FUNCTION_free(prog);
 301     OPENSSL_free(arg.argv);
 302     app_RAND_write();
 303
 304     BIO_free(bio_in);
 305     BIO_free_all(bio_out);
 306     apps_shutdown();
 307     BIO_free(bio_err);
 308     EXIT(ret);
 309 }
 310
 311 typedef enum HELP_CHOICE {
 312     OPT_hERR = -1, OPT_hEOF = 0, OPT_hHELP
 313 } HELP_CHOICE;
 314
 315 const OPTIONS help_options[] = {
 316     {OPT_HELP_STR, 1, '-', "Usage: help [options] [command]\n"},
 317
 318     OPT_SECTION("General"),
 319     {"help", OPT_hHELP, '-', "Display this summary"},
 320
 321     OPT_PARAMETERS(),
 322     {"command", 0, 0, "Name of command to display help (optional)"},
 323     {NULL}
 324 };
 325
 326
 327 int help_main(int argc, char **argv)
 328 {
 329     FUNCTION *fp;
 330     int i, nl;
 331     FUNC_TYPE tp;
 332     char *prog;
 333     HELP_CHOICE o;
 334     DISPLAY_COLUMNS dc;
 335     char *new_argv[3];
 336
 337     prog = opt_init(argc, argv, help_options);
 338     while ((o = opt_next()) != OPT_hEOF) {
 339         switch (o) {
 340         case OPT_hERR:
 341         case OPT_hEOF:
 342             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 343             return 1;
 344         case OPT_hHELP:
 345             opt_help(help_options);
 346             return 0;
 347         }
 348     }
 349
 350     if (opt_num_rest() == 1) {
 351         new_argv[0] = opt_rest()[0];
 352         new_argv[1] = "--help";
 353         new_argv[2] = NULL;
 354         return do_cmd(prog_init(), 2, new_argv);
 355     }
 356     if (opt_num_rest() != 0) {
 357         BIO_printf(bio_err, "Usage: %s\n", prog);
 358         return 1;
 359     }
 360
 361     calculate_columns(functions, &dc);
 362     BIO_printf(bio_err, "Standard commands");
 363     i = 0;
 364     tp = FT_none;
 365     for (fp = functions; fp->name != NULL; fp++) {
 366         nl = 0;
 367         if (i++ % dc.columns == 0) {
 368             BIO_printf(bio_err, "\n");
 369             nl = 1;
 370         }
 371         if (fp->type != tp) {
 372             tp = fp->type;
 373             if (!nl)
 374                 BIO_printf(bio_err, "\n");
 375             if (tp == FT_md) {
 376                 i = 1;
 377                 BIO_printf(bio_err,
 378                            "\nMessage Digest commands (see the `dgst' command for more details)\n");
 379             } else if (tp == FT_cipher) {
 380                 i = 1;
 381                 BIO_printf(bio_err,
 382                            "\nCipher commands (see the `enc' command for more details)\n");
 383             }
 384         }
 385         BIO_printf(bio_err, "%-*s", dc.width, fp->name);
 386     }
 387     BIO_printf(bio_err, "\n\n");
 388     return 0;
 389 }
 390
 391 static int do_cmd(LHASH_OF(FUNCTION) *prog, int argc, char *argv[])
 392 {
 393     FUNCTION f, *fp;
 394
 395     if (argc <= 0 || argv[0] == NULL)
 396         return 0;
 397     f.name = argv[0];
 398     fp = lh_FUNCTION_retrieve(prog, &f);
 399     if (fp == NULL) {
 400         if (EVP_get_digestbyname(argv[0])) {
 401             f.type = FT_md;
 402             f.func = dgst_main;
 403             fp = &f;
 404         } else if (EVP_get_cipherbyname(argv[0])) {
 405             f.type = FT_cipher;
 406             f.func = enc_main;
 407             fp = &f;
 408         }
 409     }
 410     if (fp != NULL) {
 411         if (fp->deprecated_alternative != NULL)
 412             warn_deprecated(fp);
 413         return fp->func(argc, argv);
 414     }
 415     if ((strncmp(argv[0], "no-", 3)) == 0) {
 416         /*
 417          * User is asking if foo is unsupported, by trying to "run" the
 418          * no-foo command.  Strange.
 419          */
 420         f.name = argv[0] + 3;
 421         if (lh_FUNCTION_retrieve(prog, &f) == NULL) {
 422             BIO_printf(bio_out, "%s\n", argv[0]);
 423             return 0;
 424         }
 425         BIO_printf(bio_out, "%s\n", argv[0] + 3);
 426         return 1;
 427     }
 428
 429     BIO_printf(bio_err, "Invalid command '%s'; type \"help\" for a list.\n",
 430                argv[0]);
 431     return 1;
 432 }
 433
 434 static int function_cmp(const FUNCTION * a, const FUNCTION * b)
 435 {
 436     return strncmp(a->name, b->name, 8);
 437 }
 438
 439 static unsigned long function_hash(const FUNCTION * a)
 440 {
 441     return OPENSSL_LH_strhash(a->name);
 442 }
 443
 444 static int SortFnByName(const void *_f1, const void *_f2)
 445 {
 446     const FUNCTION *f1 = _f1;
 447     const FUNCTION *f2 = _f2;
 448
 449     if (f1->type != f2->type)
 450         return f1->type - f2->type;
 451     return strcmp(f1->name, f2->name);
 452 }
 453
 454 static LHASH_OF(FUNCTION) *prog_init(void)
 455 {
 456     static LHASH_OF(FUNCTION) *ret = NULL;
 457     static int prog_inited = 0;
 458     FUNCTION *f;
 459     size_t i;
 460
 461     if (prog_inited)
 462         return ret;
 463
 464     prog_inited = 1;
 465
 466     /* Sort alphabetically within category. For nicer help displays. */
 467     for (i = 0, f = functions; f->name != NULL; ++f, ++i)
 468         ;
 469     qsort(functions, i, sizeof(*functions), SortFnByName);
 470
 471     if ((ret = lh_FUNCTION_new(function_hash, function_cmp)) == NULL)
 472         return NULL;
 473
 474     for (f = functions; f->name != NULL; f++)
 475         (void)lh_FUNCTION_insert(ret, f);
 476     return ret;
 477 }