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  34  * The LHASH callbacks ("hash" & "cmp") have been replaced by functions with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