apps/openssl.c

   1 /*
   2  * Copyright 1995-2019 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  37  * The LHASH callbacks ("hash" & "cmp") have been replaced by functions with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 int apps_startup(void)
  51 {
  52 #ifdef SIGPIPE
  53     signal(SIGPIPE, SIG_IGN);
  54 #endif
  55
  56     /* Set non-default library initialisation settings */
  57     if (!OPENSSL_init_ssl(OPENSSL_INIT_ENGINE_ALL_BUILTIN
  58                           | OPENSSL_INIT_LOAD_CONFIG, NULL))
  59         return 0;
  60
  61     setup_ui_method();
  62
  63     return 1;
  64 }
  65
  66 static void apps_shutdown(void)
  67 {
  68     destroy_ui_method();
  69 }
  70
  71 static char *make_config_name(void)
  72 {
  73     const char *t;
  74     size_t len;
  75     char *p;
  76
  77     if ((t = getenv("OPENSSL_CONF")) != NULL)
  78         return OPENSSL_strdup(t);
  79
  80     t = X509_get_default_cert_area();
  81     len = strlen(t) + 1 + strlen(OPENSSL_CONF) + 1;
  82     p = app_malloc(len, "config filename buffer");
  83     strcpy(p, t);
  84 #ifndef OPENSSL_SYS_VMS
  85     strcat(p, "/");
  86 #endif
  87     strcat(p, OPENSSL_CONF);
  88
  89     return p;
  90 }
  91
  92
  93 #ifndef OPENSSL_NO_TRACE
  94 typedef struct tracedata_st {
  95     BIO *bio;
  96     unsigned int ingroup:1;
  97 } tracedata;
  98
  99 static size_t internal_trace_cb(const char *buf, size_t cnt,
 100                                 int category, int cmd, void *vdata)
 101 {
 102     int ret = 0;
 103     tracedata *trace_data = vdata;
 104     char buffer[256], *hex;
 105     CRYPTO_THREAD_ID tid;
 106
 107     switch (cmd) {
 108     case OSSL_TRACE_CTRL_BEGIN:
 109         if (!ossl_assert(!trace_data->ingroup))
 110             return 0;
 111         trace_data->ingroup = 1;
 112
 113         tid = CRYPTO_THREAD_get_current_id();
 114         hex = OPENSSL_buf2hexstr((const unsigned char *)&tid, sizeof(tid));
 115         BIO_snprintf(buffer, sizeof(buffer), "TRACE[%s]:%s: ",
 116                      hex == NULL ? "<null>" : hex,
 117                      OSSL_trace_get_category_name(category));
 118         OPENSSL_free(hex);
 119         BIO_set_prefix(trace_data->bio, buffer);
 120         break;
 121     case OSSL_TRACE_CTRL_WRITE:
 122         if (!ossl_assert(trace_data->ingroup))
 123             return 0;
 124
 125         ret = BIO_write(trace_data->bio, buf, cnt);
 126         break;
 127     case OSSL_TRACE_CTRL_END:
 128         if (!ossl_assert(trace_data->ingroup))
 129             return 0;
 130         trace_data->ingroup = 0;
 131
 132         BIO_set_prefix(trace_data->bio, NULL);
 133
 134         break;
 135     }
 136
 137     return ret < 0 ? 0 : ret;
 138 }
 139
 140 DEFINE_STACK_OF(tracedata)
 141 static STACK_OF(tracedata) *trace_data_stack;
 142
 143 static void tracedata_free(tracedata *data)
 144 {
 145     BIO_free_all(data->bio);
 146     OPENSSL_free(data);
 147 }
 148
 149 static STACK_OF(tracedata) *trace_data_stack;
 150
 151 static void cleanup_trace(void)
 152 {
 153     sk_tracedata_pop_free(trace_data_stack, tracedata_free);
 154 }
 155
 156 static void setup_trace_category(int category)
 157 {
 158     BIO *channel;
 159     tracedata *trace_data;
 160
 161     if (OSSL_trace_enabled(category))
 162         return;
 163
 164     channel = BIO_push(BIO_new(BIO_f_prefix()), dup_bio_err(FORMAT_TEXT));
 165     trace_data = OPENSSL_zalloc(sizeof(*trace_data));
 166
 167     if (trace_data == NULL
 168         || (trace_data->bio = channel) == NULL
 169         || OSSL_trace_set_callback(category, internal_trace_cb,
 170                                    trace_data) == 0
 171         || sk_tracedata_push(trace_data_stack, trace_data) == 0) {
 172
 173         fprintf(stderr,
 174                 "warning: unable to setup trace callback for category '%s'.\n",
 175                 OSSL_trace_get_category_name(category));
 176
 177         OSSL_trace_set_callback(category, NULL, NULL);
 178         BIO_free_all(channel);
 179     }
 180 }
 181
 182 static void setup_trace(const char *str)
 183 {
 184     char *val;
 185
 186     /*
 187      * We add this handler as early as possible to ensure it's executed
 188      * as late as possible, i.e. after the TRACE code has done its cleanup
 189      * (which happens last in OPENSSL_cleanup).
 190      */
 191     atexit(cleanup_trace);
 192
 193     trace_data_stack = sk_tracedata_new_null();
 194     val = OPENSSL_strdup(str);
 195
 196     if (val != NULL) {
 197         char *valp = val;
 198         char *item;
 199
 200         for (valp = val; (item = strtok(valp, ",")) != NULL; valp = NULL) {
 201             int category = OSSL_trace_get_category_num(item);
 202
 203             if (category == OSSL_TRACE_CATEGORY_ALL) {
 204                 while (++category < OSSL_TRACE_CATEGORY_NUM)
 205                     setup_trace_category(category);
 206                 break;
 207             } else if (category > 0) {
 208                 setup_trace_category(category);
 209             } else {
 210                 fprintf(stderr,
 211                         "warning: unknown trace category: '%s'.\n", item);
 212             }
 213         }
 214     }
 215
 216     OPENSSL_free(val);
 217 }
 218 #endif /* OPENSSL_NO_TRACE */
 219
 220 int main(int argc, char *argv[])
 221 {
 222     FUNCTION f, *fp;
 223     LHASH_OF(FUNCTION) *prog = NULL;
 224     char *p, *pname;
 225     char buf[1024];
 226     const char *prompt;
 227     ARGS arg;
 228     int first, n, i, ret = 0;
 229
 230     arg.argv = NULL;
 231     arg.size = 0;
 232
 233     /* Set up some of the environment. */
 234     default_config_file = make_config_name();
 235     bio_in = dup_bio_in(FORMAT_TEXT);
 236     bio_out = dup_bio_out(FORMAT_TEXT);
 237     bio_err = dup_bio_err(FORMAT_TEXT);
 238
 239 #if defined(OPENSSL_SYS_VMS) && defined(__DECC)
 240     argv = copy_argv(&argc, argv);
 241 #elif defined(_WIN32)
 242     /*
 243      * Replace argv[] with UTF-8 encoded strings.
 244      */
 245     win32_utf8argv(&argc, &argv);
 246 #endif
 247
 248 #ifndef OPENSSL_NO_TRACE
 249     setup_trace(getenv("OPENSSL_TRACE"));
 250 #endif
 251
 252     if (getenv("OPENSSL_FIPS")) {
 253         BIO_printf(bio_err, "FIPS mode not supported.\n");
 254         return 1;
 255     }
 256
 257     if (!apps_startup()) {
 258         BIO_printf(bio_err,
 259                    "FATAL: Startup failure (dev note: apps_startup() failed)\n");
 260         ERR_print_errors(bio_err);
 261         ret = 1;
 262         goto end;
 263     }
 264
 265     prog = prog_init();
 266     if (prog == NULL) {
 267         BIO_printf(bio_err,
 268                    "FATAL: Startup failure (dev note: prog_init() failed)\n");
 269         ERR_print_errors(bio_err);
 270         ret = 1;
 271         goto end;
 272     }
 273     pname = opt_progname(argv[0]);
 274
 275     /* first check the program name */
 276     f.name = pname;
 277     fp = lh_FUNCTION_retrieve(prog, &f);
 278     if (fp != NULL) {
 279         argv[0] = pname;
 280         ret = fp->func(argc, argv);
 281         goto end;
 282     }
 283
 284     /* If there is stuff on the command line, run with that. */
 285     if (argc != 1) {
 286         argc--;
 287         argv++;
 288         ret = do_cmd(prog, argc, argv);
 289         if (ret < 0)
 290             ret = 0;
 291         goto end;
 292     }
 293
 294     /* ok, lets enter interactive mode */
 295     for (;;) {
 296         ret = 0;
 297         /* Read a line, continue reading if line ends with \ */
 298         for (p = buf, n = sizeof(buf), i = 0, first = 1; n > 0; first = 0) {
 299             prompt = first ? "OpenSSL> " : "> ";
 300             p[0] = '\0';
 301 #ifndef READLINE
 302             fputs(prompt, stdout);
 303             fflush(stdout);
 304             if (!fgets(p, n, stdin))
 305                 goto end;
 306             if (p[0] == '\0')
 307                 goto end;
 308             i = strlen(p);
 309             if (i <= 1)
 310                 break;
 311             if (p[i - 2] != '\\')
 312                 break;
 313             i -= 2;
 314             p += i;
 315             n -= i;
 316 #else
 317             {
 318                 extern char *readline(const char *);
 319                 extern void add_history(const char *cp);
 320                 char *text;
 321
 322                 text = readline(prompt);
 323                 if (text == NULL)
 324                     goto end;
 325                 i = strlen(text);
 326                 if (i == 0 || i > n)
 327                     break;
 328                 if (text[i - 1] != '\\') {
 329                     p += strlen(strcpy(p, text));
 330                     free(text);
 331                     add_history(buf);
 332                     break;
 333                 }
 334
 335                 text[i - 1] = '\0';
 336                 p += strlen(strcpy(p, text));
 337                 free(text);
 338                 n -= i;
 339             }
 340 #endif
 341         }
 342
 343         if (!chopup_args(&arg, buf)) {
 344             BIO_printf(bio_err, "Can't parse (no memory?)\n");
 345             break;
 346         }
 347
 348         ret = do_cmd(prog, arg.argc, arg.argv);
 349         if (ret == EXIT_THE_PROGRAM) {
 350             ret = 0;
 351             goto end;
 352         }
 353         if (ret != 0)
 354             BIO_printf(bio_err, "error in %s\n", arg.argv[0]);
 355         (void)BIO_flush(bio_out);
 356         (void)BIO_flush(bio_err);
 357     }
 358     ret = 1;
 359  end:
 360     OPENSSL_free(default_config_file);
 361     lh_FUNCTION_free(prog);
 362     OPENSSL_free(arg.argv);
 363     app_RAND_write();
 364
 365     BIO_free(bio_in);
 366     BIO_free_all(bio_out);
 367     apps_shutdown();
 368     BIO_free(bio_err);
 369     EXIT(ret);
 370 }
 371
 372 typedef enum HELP_CHOICE {
 373     OPT_hERR = -1, OPT_hEOF = 0, OPT_hHELP
 374 } HELP_CHOICE;
 375
 376 const OPTIONS help_options[] = {
 377     {OPT_HELP_STR, 1, '-', "Usage: help [options] [command]\n"},
 378
 379     OPT_SECTION("General"),
 380     {"help", OPT_hHELP, '-', "Display this summary"},
 381
 382     OPT_PARAMETERS(),
 383     {"command", 0, 0, "Name of command to display help (optional)"},
 384     {NULL}
 385 };
 386
 387
 388 int help_main(int argc, char **argv)
 389 {
 390     FUNCTION *fp;
 391     int i, nl;
 392     FUNC_TYPE tp;
 393     char *prog;
 394     HELP_CHOICE o;
 395     DISPLAY_COLUMNS dc;
 396
 397     prog = opt_init(argc, argv, help_options);
 398     while ((o = opt_next()) != OPT_hEOF) {
 399         switch (o) {
 400         case OPT_hERR:
 401         case OPT_hEOF:
 402             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 403             return 1;
 404         case OPT_hHELP:
 405             opt_help(help_options);
 406             return 0;
 407         }
 408     }
 409
 410     if (opt_num_rest() == 1) {
 411         char *new_argv[3];
 412
 413         new_argv[0] = opt_rest()[0];
 414         new_argv[1] = "--help";
 415         new_argv[2] = NULL;
 416         return do_cmd(prog_init(), 2, new_argv);
 417     }
 418     if (opt_num_rest() != 0) {
 419         BIO_printf(bio_err, "Usage: %s\n", prog);
 420         return 1;
 421     }
 422
 423     calculate_columns(functions, &dc);
 424     BIO_printf(bio_err, "Standard commands");
 425     i = 0;
 426     tp = FT_none;
 427     for (fp = functions; fp->name != NULL; fp++) {
 428         nl = 0;
 429         if (i++ % dc.columns == 0) {
 430             BIO_printf(bio_err, "\n");
 431             nl = 1;
 432         }
 433         if (fp->type != tp) {
 434             tp = fp->type;
 435             if (!nl)
 436                 BIO_printf(bio_err, "\n");
 437             if (tp == FT_md) {
 438                 i = 1;
 439                 BIO_printf(bio_err,
 440                            "\nMessage Digest commands (see the `dgst' command for more details)\n");
 441             } else if (tp == FT_cipher) {
 442                 i = 1;
 443                 BIO_printf(bio_err,
 444                            "\nCipher commands (see the `enc' command for more details)\n");
 445             }
 446         }
 447         BIO_printf(bio_err, "%-*s", dc.width, fp->name);
 448     }
 449     BIO_printf(bio_err, "\n\n");
 450     return 0;
 451 }
 452
 453 static int do_cmd(LHASH_OF(FUNCTION) *prog, int argc, char *argv[])
 454 {
 455     FUNCTION f, *fp;
 456
 457     if (argc <= 0 || argv[0] == NULL)
 458         return 0;
 459     f.name = argv[0];
 460     fp = lh_FUNCTION_retrieve(prog, &f);
 461     if (fp == NULL) {
 462         if (EVP_get_digestbyname(argv[0])) {
 463             f.type = FT_md;
 464             f.func = dgst_main;
 465             fp = &f;
 466         } else if (EVP_get_cipherbyname(argv[0])) {
 467             f.type = FT_cipher;
 468             f.func = enc_main;
 469             fp = &f;
 470         }
 471     }
 472     if (fp != NULL) {
 473         return fp->func(argc, argv);
 474     }
 475     if ((strncmp(argv[0], "no-", 3)) == 0) {
 476         /*
 477          * User is asking if foo is unsupported, by trying to "run" the
 478          * no-foo command.  Strange.
 479          */
 480         f.name = argv[0] + 3;
 481         if (lh_FUNCTION_retrieve(prog, &f) == NULL) {
 482             BIO_printf(bio_out, "%s\n", argv[0]);
 483             return 0;
 484         }
 485         BIO_printf(bio_out, "%s\n", argv[0] + 3);
 486         return 1;
 487     }
 488     if (strcmp(argv[0], "quit") == 0 || strcmp(argv[0], "q") == 0 ||
 489         strcmp(argv[0], "exit") == 0 || strcmp(argv[0], "bye") == 0)
 490         /* Special value to mean "exit the program. */
 491         return EXIT_THE_PROGRAM;
 492
 493     BIO_printf(bio_err, "Invalid command '%s'; type \"help\" for a list.\n",
 494                argv[0]);
 495     return 1;
 496 }
 497
 498 static int function_cmp(const FUNCTION * a, const FUNCTION * b)
 499 {
 500     return strncmp(a->name, b->name, 8);
 501 }
 502
 503 static unsigned long function_hash(const FUNCTION * a)
 504 {
 505     return OPENSSL_LH_strhash(a->name);
 506 }
 507
 508 static int SortFnByName(const void *_f1, const void *_f2)
 509 {
 510     const FUNCTION *f1 = _f1;
 511     const FUNCTION *f2 = _f2;
 512
 513     if (f1->type != f2->type)
 514         return f1->type - f2->type;
 515     return strcmp(f1->name, f2->name);
 516 }
 517
 518 static LHASH_OF(FUNCTION) *prog_init(void)
 519 {
 520     static LHASH_OF(FUNCTION) *ret = NULL;
 521     static int prog_inited = 0;
 522     FUNCTION *f;
 523     size_t i;
 524
 525     if (prog_inited)
 526         return ret;
 527
 528     prog_inited = 1;
 529
 530     /* Sort alphabetically within category. For nicer help displays. */
 531     for (i = 0, f = functions; f->name != NULL; ++f, ++i)
 532         ;
 533     qsort(functions, i, sizeof(*functions), SortFnByName);
 534
 535     if ((ret = lh_FUNCTION_new(function_hash, function_cmp)) == NULL)
 536         return NULL;
 537
 538     for (f = functions; f->name != NULL; f++)
 539         (void)lh_FUNCTION_insert(ret, f);
 540     return ret;
 541 }