apps/lib/opt.c

   1 /*
   2  * Copyright 2015-2021 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 /*
  11  * This file is also used by the test suite. Do not #include "apps.h".
  12  */
  13 #include "opt.h"
  14 #include "fmt.h"
  15 #include "internal/nelem.h"
  16 #include <string.h>
  17 #if !defined(OPENSSL_SYS_MSDOS)
  18 # include <unistd.h>
  19 #endif
  20
  21 #include <stdlib.h>
  22 #include <errno.h>
  23 #include <ctype.h>
  24 #include <limits.h>
  25 #include <openssl/bio.h>
  26 #include <openssl/x509v3.h>
  27
  28 #define MAX_OPT_HELP_WIDTH 30
  29 const char OPT_HELP_STR[] = "-H";
  30 const char OPT_MORE_STR[] = "-M";
  31 const char OPT_SECTION_STR[] = "-S";
  32 const char OPT_PARAM_STR[] = "-P";
  33
  34 /* Our state */
  35 static char **argv;
  36 static int argc;
  37 static int opt_index;
  38 static char *arg;
  39 static char *flag;
  40 static char *dunno;
  41 static const OPTIONS *unknown;
  42 static const OPTIONS *opts;
  43 static char prog[40];
  44
  45 /*
  46  * Return the simple name of the program; removing various platform gunk.
  47  */
  48 #if defined(OPENSSL_SYS_WIN32)
  49
  50 const char *opt_path_end(const char *filename)
  51 {
  52     const char *p;
  53
  54     /* find the last '/', '\' or ':' */
  55     for (p = filename + strlen(filename); --p > filename; )
  56         if (*p == '/' || *p == '\\' || *p == ':') {
  57             p++;
  58             break;
  59         }
  60     return p;
  61 }
  62
  63 char *opt_progname(const char *argv0)
  64 {
  65     size_t i, n;
  66     const char *p;
  67     char *q;
  68
  69     p = opt_path_end(argv0);
  70
  71     /* Strip off trailing nonsense. */
  72     n = strlen(p);
  73     if (n > 4 &&
  74         (strcmp(&p[n - 4], ".exe") == 0 || strcmp(&p[n - 4], ".EXE") == 0))
  75         n -= 4;
  76
  77     /* Copy over the name, in lowercase. */
  78     if (n > sizeof(prog) - 1)
  79         n = sizeof(prog) - 1;
  80     for (q = prog, i = 0; i < n; i++, p++)
  81         *q++ = tolower((unsigned char)*p);
  82     *q = '\0';
  83     return prog;
  84 }
  85
  86 #elif defined(OPENSSL_SYS_VMS)
  87
  88 const char *opt_path_end(const char *filename)
  89 {
  90     const char *p;
  91
  92     /* Find last special character sys:[foo.bar]openssl */
  93     for (p = filename + strlen(filename); --p > filename;)
  94         if (*p == ':' || *p == ']' || *p == '>') {
  95             p++;
  96             break;
  97         }
  98     return p;
  99 }
 100
 101 char *opt_progname(const char *argv0)
 102 {
 103     const char *p, *q;
 104
 105     /* Find last special character sys:[foo.bar]openssl */
 106     p = opt_path_end(argv0);
 107     q = strrchr(p, '.');
 108     strncpy(prog, p, sizeof(prog) - 1);
 109     prog[sizeof(prog) - 1] = '\0';
 110     if (q != NULL && q - p < sizeof(prog))
 111         prog[q - p] = '\0';
 112     return prog;
 113 }
 114
 115 #else
 116
 117 const char *opt_path_end(const char *filename)
 118 {
 119     const char *p;
 120
 121     /* Could use strchr, but this is like the ones above. */
 122     for (p = filename + strlen(filename); --p > filename;)
 123         if (*p == '/') {
 124             p++;
 125             break;
 126         }
 127     return p;
 128 }
 129
 130 char *opt_progname(const char *argv0)
 131 {
 132     const char *p;
 133
 134     p = opt_path_end(argv0);
 135     strncpy(prog, p, sizeof(prog) - 1);
 136     prog[sizeof(prog) - 1] = '\0';
 137     return prog;
 138 }
 139 #endif
 140
 141 char *opt_appname(const char *arg0)
 142 {
 143     size_t len = strlen(prog);
 144
 145     if (arg0 != NULL)
 146         snprintf(prog + len, sizeof(prog) - len - 1, " %s", arg0);
 147     return prog;
 148 }
 149
 150 char *opt_getprog(void)
 151 {
 152     return prog;
 153 }
 154
 155 /* Set up the arg parsing. */
 156 char *opt_init(int ac, char **av, const OPTIONS *o)
 157 {
 158     /* Store state. */
 159     argc = ac;
 160     argv = av;
 161     opt_begin();
 162     opts = o;
 163     unknown = NULL;
 164
 165     /* Check all options up until the PARAM marker (if present) */
 166     for (; o->name != NULL && o->name != OPT_PARAM_STR; ++o) {
 167 #ifndef NDEBUG
 168         const OPTIONS *next;
 169         int duplicated, i;
 170 #endif
 171
 172         if (o->name == OPT_HELP_STR
 173                 || o->name == OPT_MORE_STR
 174                 || o->name == OPT_SECTION_STR)
 175             continue;
 176 #ifndef NDEBUG
 177         i = o->valtype;
 178
 179         /* Make sure options are legit. */
 180         OPENSSL_assert(o->name[0] != '-');
 181         OPENSSL_assert(o->retval > 0);
 182         switch (i) {
 183         case   0: case '-': case '/': case '<': case '>': case 'E': case 'F':
 184         case 'M': case 'U': case 'f': case 'l': case 'n': case 'p': case 's':
 185         case 'u': case 'c': case ':':
 186             break;
 187         default:
 188             OPENSSL_assert(0);
 189         }
 190
 191         /* Make sure there are no duplicates. */
 192         for (next = o + 1; next->name; ++next) {
 193             /*
 194              * Some compilers inline strcmp and the assert string is too long.
 195              */
 196             duplicated = strcmp(o->name, next->name) == 0;
 197             OPENSSL_assert(!duplicated);
 198         }
 199 #endif
 200         if (o->name[0] == '\0') {
 201             OPENSSL_assert(unknown == NULL);
 202             unknown = o;
 203             OPENSSL_assert(unknown->valtype == 0 || unknown->valtype == '-');
 204         }
 205     }
 206     return prog;
 207 }
 208
 209 static OPT_PAIR formats[] = {
 210     {"PEM/DER", OPT_FMT_PEMDER},
 211     {"pkcs12", OPT_FMT_PKCS12},
 212     {"smime", OPT_FMT_SMIME},
 213     {"engine", OPT_FMT_ENGINE},
 214     {"msblob", OPT_FMT_MSBLOB},
 215     {"nss", OPT_FMT_NSS},
 216     {"text", OPT_FMT_TEXT},
 217     {"http", OPT_FMT_HTTP},
 218     {"pvk", OPT_FMT_PVK},
 219     {NULL}
 220 };
 221
 222 /* Print an error message about a failed format parse. */
 223 int opt_format_error(const char *s, unsigned long flags)
 224 {
 225     OPT_PAIR *ap;
 226
 227     if (flags == OPT_FMT_PEMDER) {
 228         opt_printf_stderr("%s: Bad format \"%s\"; must be pem or der\n",
 229                           prog, s);
 230     } else {
 231         opt_printf_stderr("%s: Bad format \"%s\"; must be one of:\n",
 232                           prog, s);
 233         for (ap = formats; ap->name; ap++)
 234             if (flags & ap->retval)
 235                 opt_printf_stderr("   %s\n", ap->name);
 236     }
 237     return 0;
 238 }
 239
 240 /* Parse a format string, put it into *result; return 0 on failure, else 1. */
 241 int opt_format(const char *s, unsigned long flags, int *result)
 242 {
 243     switch (*s) {
 244     default:
 245         opt_printf_stderr("%s: Bad format \"%s\"\n", prog, s);
 246         return 0;
 247     case 'D':
 248     case 'd':
 249         if ((flags & OPT_FMT_PEMDER) == 0)
 250             return opt_format_error(s, flags);
 251         *result = FORMAT_ASN1;
 252         break;
 253     case 'T':
 254     case 't':
 255         if ((flags & OPT_FMT_TEXT) == 0)
 256             return opt_format_error(s, flags);
 257         *result = FORMAT_TEXT;
 258         break;
 259     case 'N':
 260     case 'n':
 261         if ((flags & OPT_FMT_NSS) == 0)
 262             return opt_format_error(s, flags);
 263         if (strcmp(s, "NSS") != 0 && strcmp(s, "nss") != 0)
 264             return opt_format_error(s, flags);
 265         *result = FORMAT_NSS;
 266         break;
 267     case 'S':
 268     case 's':
 269         if ((flags & OPT_FMT_SMIME) == 0)
 270             return opt_format_error(s, flags);
 271         *result = FORMAT_SMIME;
 272         break;
 273     case 'M':
 274     case 'm':
 275         if ((flags & OPT_FMT_MSBLOB) == 0)
 276             return opt_format_error(s, flags);
 277         *result = FORMAT_MSBLOB;
 278         break;
 279     case 'E':
 280     case 'e':
 281         if ((flags & OPT_FMT_ENGINE) == 0)
 282             return opt_format_error(s, flags);
 283         *result = FORMAT_ENGINE;
 284         break;
 285     case 'H':
 286     case 'h':
 287         if ((flags & OPT_FMT_HTTP) == 0)
 288             return opt_format_error(s, flags);
 289         *result = FORMAT_HTTP;
 290         break;
 291     case '1':
 292         if ((flags & OPT_FMT_PKCS12) == 0)
 293             return opt_format_error(s, flags);
 294         *result = FORMAT_PKCS12;
 295         break;
 296     case 'P':
 297     case 'p':
 298         if (s[1] == '\0' || strcmp(s, "PEM") == 0 || strcmp(s, "pem") == 0) {
 299             if ((flags & OPT_FMT_PEMDER) == 0)
 300                 return opt_format_error(s, flags);
 301             *result = FORMAT_PEM;
 302         } else if (strcmp(s, "PVK") == 0 || strcmp(s, "pvk") == 0) {
 303             if ((flags & OPT_FMT_PVK) == 0)
 304                 return opt_format_error(s, flags);
 305             *result = FORMAT_PVK;
 306         } else if (strcmp(s, "P12") == 0 || strcmp(s, "p12") == 0
 307                    || strcmp(s, "PKCS12") == 0 || strcmp(s, "pkcs12") == 0) {
 308             if ((flags & OPT_FMT_PKCS12) == 0)
 309                 return opt_format_error(s, flags);
 310             *result = FORMAT_PKCS12;
 311         } else {
 312             opt_printf_stderr("%s: Bad format \"%s\"\n", prog, s);
 313             return 0;
 314         }
 315         break;
 316     }
 317     return 1;
 318 }
 319
 320 /* Return string representing the given format. */
 321 const char *format2str(int format)
 322 {
 323     switch (format) {
 324     default:
 325         return "(undefined)";
 326     case FORMAT_PEM:
 327         return "PEM";
 328     case FORMAT_ASN1:
 329         return "DER";
 330     case FORMAT_TEXT:
 331         return "TEXT";
 332     case FORMAT_NSS:
 333         return "NSS";
 334     case FORMAT_SMIME:
 335         return "SMIME";
 336     case FORMAT_MSBLOB:
 337         return "MSBLOB";
 338     case FORMAT_ENGINE:
 339         return "ENGINE";
 340     case FORMAT_HTTP:
 341         return "HTTP";
 342     case FORMAT_PKCS12:
 343         return "P12";
 344     case FORMAT_PVK:
 345         return "PVK";
 346     }
 347 }
 348
 349 /* Print an error message about unsuitable/unsupported format requested. */
 350 void print_format_error(int format, unsigned long flags)
 351 {
 352     (void)opt_format_error(format2str(format), flags);
 353 }
 354
 355 /* Parse a cipher name, put it in *EVP_CIPHER; return 0 on failure, else 1. */
 356 int opt_cipher(const char *name, const EVP_CIPHER **cipherp)
 357 {
 358     *cipherp = EVP_get_cipherbyname(name);
 359     if (*cipherp != NULL)
 360         return 1;
 361     opt_printf_stderr("%s: Unknown cipher: %s\n", prog, name);
 362     return 0;
 363 }
 364
 365 /*
 366  * Parse message digest name, put it in *EVP_MD; return 0 on failure, else 1.
 367  */
 368 int opt_md(const char *name, const EVP_MD **mdp)
 369 {
 370     *mdp = EVP_get_digestbyname(name);
 371     if (*mdp != NULL)
 372         return 1;
 373     opt_printf_stderr("%s: Unknown option or message digest: %s\n", prog,
 374                       name != NULL ? name : "\"\"");
 375     return 0;
 376 }
 377
 378 /* Look through a list of name/value pairs. */
 379 int opt_pair(const char *name, const OPT_PAIR* pairs, int *result)
 380 {
 381     const OPT_PAIR *pp;
 382
 383     for (pp = pairs; pp->name; pp++)
 384         if (strcmp(pp->name, name) == 0) {
 385             *result = pp->retval;
 386             return 1;
 387         }
 388     opt_printf_stderr("%s: Value must be one of:\n", prog);
 389     for (pp = pairs; pp->name; pp++)
 390         opt_printf_stderr("\t%s\n", pp->name);
 391     return 0;
 392 }
 393
 394 /* Look through a list of valid names */
 395 int opt_string(const char *name, const char **options)
 396 {
 397     const char **p;
 398
 399     for (p = options; *p != NULL; p++)
 400         if (strcmp(*p, name) == 0)
 401             return 1;
 402     opt_printf_stderr("%s: Value must be one of:\n", prog);
 403     for (p = options; *p != NULL; p++)
 404         opt_printf_stderr("\t%s\n", *p);
 405     return 0;
 406 }
 407
 408 /* Parse an int, put it into *result; return 0 on failure, else 1. */
 409 int opt_int(const char *value, int *result)
 410 {
 411     long l;
 412
 413     if (!opt_long(value, &l))
 414         return 0;
 415     *result = (int)l;
 416     if (*result != l) {
 417         opt_printf_stderr("%s: Value \"%s\" outside integer range\n",
 418                           prog, value);
 419         return 0;
 420     }
 421     return 1;
 422 }
 423
 424 static void opt_number_error(const char *v)
 425 {
 426     size_t i = 0;
 427     struct strstr_pair_st {
 428         char *prefix;
 429         char *name;
 430     } b[] = {
 431         {"0x", "a hexadecimal"},
 432         {"0X", "a hexadecimal"},
 433         {"0", "an octal"}
 434     };
 435
 436     for (i = 0; i < OSSL_NELEM(b); i++) {
 437         if (strncmp(v, b[i].prefix, strlen(b[i].prefix)) == 0) {
 438             opt_printf_stderr("%s: Can't parse \"%s\" as %s number\n",
 439                               prog, v, b[i].name);
 440             return;
 441         }
 442     }
 443     opt_printf_stderr("%s: Can't parse \"%s\" as a number\n", prog, v);
 444     return;
 445 }
 446
 447 /* Parse a long, put it into *result; return 0 on failure, else 1. */
 448 int opt_long(const char *value, long *result)
 449 {
 450     int oerrno = errno;
 451     long l;
 452     char *endp;
 453
 454     errno = 0;
 455     l = strtol(value, &endp, 0);
 456     if (*endp
 457             || endp == value
 458             || ((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE)
 459             || (l == 0 && errno != 0)) {
 460         opt_number_error(value);
 461         errno = oerrno;
 462         return 0;
 463     }
 464     *result = l;
 465     errno = oerrno;
 466     return 1;
 467 }
 468
 469 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L && \
 470     defined(INTMAX_MAX) && defined(UINTMAX_MAX) && \
 471     !defined(OPENSSL_NO_INTTYPES_H)
 472
 473 /* Parse an intmax_t, put it into *result; return 0 on failure, else 1. */
 474 int opt_imax(const char *value, intmax_t *result)
 475 {
 476     int oerrno = errno;
 477     intmax_t m;
 478     char *endp;
 479
 480     errno = 0;
 481     m = strtoimax(value, &endp, 0);
 482     if (*endp
 483             || endp == value
 484             || ((m == INTMAX_MAX || m == INTMAX_MIN) && errno == ERANGE)
 485             || (m == 0 && errno != 0)) {
 486         opt_number_error(value);
 487         errno = oerrno;
 488         return 0;
 489     }
 490     *result = m;
 491     errno = oerrno;
 492     return 1;
 493 }
 494
 495 /* Parse a uintmax_t, put it into *result; return 0 on failure, else 1. */
 496 int opt_umax(const char *value, uintmax_t *result)
 497 {
 498     int oerrno = errno;
 499     uintmax_t m;
 500     char *endp;
 501
 502     errno = 0;
 503     m = strtoumax(value, &endp, 0);
 504     if (*endp
 505             || endp == value
 506             || (m == UINTMAX_MAX && errno == ERANGE)
 507             || (m == 0 && errno != 0)) {
 508         opt_number_error(value);
 509         errno = oerrno;
 510         return 0;
 511     }
 512     *result = m;
 513     errno = oerrno;
 514     return 1;
 515 }
 516 #endif
 517
 518 /*
 519  * Parse an unsigned long, put it into *result; return 0 on failure, else 1.
 520  */
 521 int opt_ulong(const char *value, unsigned long *result)
 522 {
 523     int oerrno = errno;
 524     char *endptr;
 525     unsigned long l;
 526
 527     errno = 0;
 528     l = strtoul(value, &endptr, 0);
 529     if (*endptr
 530             || endptr == value
 531             || ((l == ULONG_MAX) && errno == ERANGE)
 532             || (l == 0 && errno != 0)) {
 533         opt_number_error(value);
 534         errno = oerrno;
 535         return 0;
 536     }
 537     *result = l;
 538     errno = oerrno;
 539     return 1;
 540 }
 541
 542 /*
 543  * We pass opt as an int but cast it to "enum range" so that all the
 544  * items in the OPT_V_ENUM enumeration are caught; this makes -Wswitch
 545  * in gcc do the right thing.
 546  */
 547 enum range { OPT_V_ENUM };
 548
 549 int opt_verify(int opt, X509_VERIFY_PARAM *vpm)
 550 {
 551     int i;
 552     ossl_intmax_t t = 0;
 553     ASN1_OBJECT *otmp;
 554     X509_PURPOSE *xptmp;
 555     const X509_VERIFY_PARAM *vtmp;
 556
 557     OPENSSL_assert(vpm != NULL);
 558     OPENSSL_assert(opt > OPT_V__FIRST);
 559     OPENSSL_assert(opt < OPT_V__LAST);
 560
 561     switch ((enum range)opt) {
 562     case OPT_V__FIRST:
 563     case OPT_V__LAST:
 564         return 0;
 565     case OPT_V_POLICY:
 566         otmp = OBJ_txt2obj(opt_arg(), 0);
 567         if (otmp == NULL) {
 568             opt_printf_stderr("%s: Invalid Policy %s\n", prog, opt_arg());
 569             return 0;
 570         }
 571         X509_VERIFY_PARAM_add0_policy(vpm, otmp);
 572         break;
 573     case OPT_V_PURPOSE:
 574         /* purpose name -> purpose index */
 575         i = X509_PURPOSE_get_by_sname(opt_arg());
 576         if (i < 0) {
 577             opt_printf_stderr("%s: Invalid purpose %s\n", prog, opt_arg());
 578             return 0;
 579         }
 580
 581         /* purpose index -> purpose object */
 582         xptmp = X509_PURPOSE_get0(i);
 583
 584         /* purpose object -> purpose value */
 585         i = X509_PURPOSE_get_id(xptmp);
 586
 587         if (!X509_VERIFY_PARAM_set_purpose(vpm, i)) {
 588             opt_printf_stderr("%s: Internal error setting purpose %s\n",
 589                               prog, opt_arg());
 590             return 0;
 591         }
 592         break;
 593     case OPT_V_VERIFY_NAME:
 594         vtmp = X509_VERIFY_PARAM_lookup(opt_arg());
 595         if (vtmp == NULL) {
 596             opt_printf_stderr("%s: Invalid verify name %s\n",
 597                               prog, opt_arg());
 598             return 0;
 599         }
 600         X509_VERIFY_PARAM_set1(vpm, vtmp);
 601         break;
 602     case OPT_V_VERIFY_DEPTH:
 603         i = atoi(opt_arg());
 604         if (i >= 0)
 605             X509_VERIFY_PARAM_set_depth(vpm, i);
 606         break;
 607     case OPT_V_VERIFY_AUTH_LEVEL:
 608         i = atoi(opt_arg());
 609         if (i >= 0)
 610             X509_VERIFY_PARAM_set_auth_level(vpm, i);
 611         break;
 612     case OPT_V_ATTIME:
 613         if (!opt_imax(opt_arg(), &t))
 614             return 0;
 615         if (t != (time_t)t) {
 616             opt_printf_stderr("%s: epoch time out of range %s\n",
 617                               prog, opt_arg());
 618             return 0;
 619         }
 620         X509_VERIFY_PARAM_set_time(vpm, (time_t)t);
 621         break;
 622     case OPT_V_VERIFY_HOSTNAME:
 623         if (!X509_VERIFY_PARAM_set1_host(vpm, opt_arg(), 0))
 624             return 0;
 625         break;
 626     case OPT_V_VERIFY_EMAIL:
 627         if (!X509_VERIFY_PARAM_set1_email(vpm, opt_arg(), 0))
 628             return 0;
 629         break;
 630     case OPT_V_VERIFY_IP:
 631         if (!X509_VERIFY_PARAM_set1_ip_asc(vpm, opt_arg()))
 632             return 0;
 633         break;
 634     case OPT_V_IGNORE_CRITICAL:
 635         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_IGNORE_CRITICAL);
 636         break;
 637     case OPT_V_ISSUER_CHECKS:
 638         /* NOP, deprecated */
 639         break;
 640     case OPT_V_CRL_CHECK:
 641         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_CRL_CHECK);
 642         break;
 643     case OPT_V_CRL_CHECK_ALL:
 644         X509_VERIFY_PARAM_set_flags(vpm,
 645                                     X509_V_FLAG_CRL_CHECK |
 646                                     X509_V_FLAG_CRL_CHECK_ALL);
 647         break;
 648     case OPT_V_POLICY_CHECK:
 649         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_POLICY_CHECK);
 650         break;
 651     case OPT_V_EXPLICIT_POLICY:
 652         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_EXPLICIT_POLICY);
 653         break;
 654     case OPT_V_INHIBIT_ANY:
 655         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_INHIBIT_ANY);
 656         break;
 657     case OPT_V_INHIBIT_MAP:
 658         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_INHIBIT_MAP);
 659         break;
 660     case OPT_V_X509_STRICT:
 661         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_X509_STRICT);
 662         break;
 663     case OPT_V_EXTENDED_CRL:
 664         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_EXTENDED_CRL_SUPPORT);
 665         break;
 666     case OPT_V_USE_DELTAS:
 667         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_USE_DELTAS);
 668         break;
 669     case OPT_V_POLICY_PRINT:
 670         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_NOTIFY_POLICY);
 671         break;
 672     case OPT_V_CHECK_SS_SIG:
 673         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_CHECK_SS_SIGNATURE);
 674         break;
 675     case OPT_V_TRUSTED_FIRST:
 676         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_TRUSTED_FIRST);
 677         break;
 678     case OPT_V_SUITEB_128_ONLY:
 679         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_SUITEB_128_LOS_ONLY);
 680         break;
 681     case OPT_V_SUITEB_128:
 682         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_SUITEB_128_LOS);
 683         break;
 684     case OPT_V_SUITEB_192:
 685         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_SUITEB_192_LOS);
 686         break;
 687     case OPT_V_PARTIAL_CHAIN:
 688         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_PARTIAL_CHAIN);
 689         break;
 690     case OPT_V_NO_ALT_CHAINS:
 691         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_NO_ALT_CHAINS);
 692         break;
 693     case OPT_V_NO_CHECK_TIME:
 694         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_NO_CHECK_TIME);
 695         break;
 696     case OPT_V_ALLOW_PROXY_CERTS:
 697         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_ALLOW_PROXY_CERTS);
 698         break;
 699     }
 700     return 1;
 701
 702 }
 703
 704 void opt_begin(void)
 705 {
 706     opt_index = 1;
 707     arg = NULL;
 708     flag = NULL;
 709 }
 710
 711 /*
 712  * Parse the next flag (and value if specified), return 0 if done, -1 on
 713  * error, otherwise the flag's retval.
 714  */
 715 int opt_next(void)
 716 {
 717     char *p;
 718     const OPTIONS *o;
 719     int ival;
 720     long lval;
 721     unsigned long ulval;
 722     ossl_intmax_t imval;
 723     ossl_uintmax_t umval;
 724
 725     /* Look at current arg; at end of the list? */
 726     arg = NULL;
 727     p = argv[opt_index];
 728     if (p == NULL)
 729         return 0;
 730
 731     /* If word doesn't start with a -, we're done. */
 732     if (*p != '-')
 733         return 0;
 734
 735     /* Hit "--" ? We're done. */
 736     opt_index++;
 737     if (strcmp(p, "--") == 0)
 738         return 0;
 739
 740     /* Allow -nnn and --nnn */
 741     if (*++p == '-')
 742         p++;
 743     flag = p - 1;
 744
 745     /* If we have --flag=foo, snip it off */
 746     if ((arg = strchr(p, '=')) != NULL)
 747         *arg++ = '\0';
 748     for (o = opts; o->name; ++o) {
 749         /* If not this option, move on to the next one. */
 750         if (!(strcmp(p, "h") == 0 && strcmp(o->name, "help") == 0)
 751                 && strcmp(p, o->name) != 0)
 752             continue;
 753
 754         /* If it doesn't take a value, make sure none was given. */
 755         if (o->valtype == 0 || o->valtype == '-') {
 756             if (arg) {
 757                 opt_printf_stderr("%s: Option -%s does not take a value\n",
 758                                   prog, p);
 759                 return -1;
 760             }
 761             return o->retval;
 762         }
 763
 764         /* Want a value; get the next param if =foo not used. */
 765         if (arg == NULL) {
 766             if (argv[opt_index] == NULL) {
 767                 opt_printf_stderr("%s: Option -%s needs a value\n",
 768                                   prog, o->name);
 769                 return -1;
 770             }
 771             arg = argv[opt_index++];
 772         }
 773
 774         /* Syntax-check value. */
 775         switch (o->valtype) {
 776         default:
 777         case 's':
 778         case ':':
 779             /* Just a string. */
 780             break;
 781         case '/':
 782             if (opt_isdir(arg) > 0)
 783                 break;
 784             opt_printf_stderr("%s: Not a directory: %s\n", prog, arg);
 785             return -1;
 786         case '<':
 787             /* Input file. */
 788             break;
 789         case '>':
 790             /* Output file. */
 791             break;
 792         case 'p':
 793         case 'n':
 794             if (!opt_int(arg, &ival))
 795                 return -1;
 796             if (o->valtype == 'p' && ival <= 0) {
 797                 opt_printf_stderr("%s: Non-positive number \"%s\" for -%s\n",
 798                                   prog, arg, o->name);
 799                 return -1;
 800             }
 801             break;
 802         case 'M':
 803             if (!opt_imax(arg, &imval))
 804                 return -1;
 805             break;
 806         case 'U':
 807             if (!opt_umax(arg, &umval))
 808                 return -1;
 809             break;
 810         case 'l':
 811             if (!opt_long(arg, &lval))
 812                 return -1;
 813             break;
 814         case 'u':
 815             if (!opt_ulong(arg, &ulval))
 816                 return -1;
 817             break;
 818         case 'c':
 819         case 'E':
 820         case 'F':
 821         case 'f':
 822             if (opt_format(arg,
 823                            o->valtype == 'c' ? OPT_FMT_PDS :
 824                            o->valtype == 'E' ? OPT_FMT_PDE :
 825                            o->valtype == 'F' ? OPT_FMT_PEMDER
 826                            : OPT_FMT_ANY, &ival))
 827                 break;
 828             opt_printf_stderr("%s: Invalid format \"%s\" for -%s\n",
 829                               prog, arg, o->name);
 830             return -1;
 831         }
 832
 833         /* Return the flag value. */
 834         return o->retval;
 835     }
 836     if (unknown != NULL) {
 837         dunno = p;
 838         return unknown->retval;
 839     }
 840     opt_printf_stderr("%s: Unknown option: -%s\n", prog, p);
 841     return -1;
 842 }
 843
 844 /* Return the most recent flag parameter. */
 845 char *opt_arg(void)
 846 {
 847     return arg;
 848 }
 849
 850 /* Return the most recent flag. */
 851 char *opt_flag(void)
 852 {
 853     return flag;
 854 }
 855
 856 /* Return the unknown option. */
 857 char *opt_unknown(void)
 858 {
 859     return dunno;
 860 }
 861
 862 /* Return the rest of the arguments after parsing flags. */
 863 char **opt_rest(void)
 864 {
 865     return &argv[opt_index];
 866 }
 867
 868 /* How many items in remaining args? */
 869 int opt_num_rest(void)
 870 {
 871     int i = 0;
 872     char **pp;
 873
 874     for (pp = opt_rest(); *pp; pp++, i++)
 875         continue;
 876     return i;
 877 }
 878
 879 /* Return a string describing the parameter type. */
 880 static const char *valtype2param(const OPTIONS *o)
 881 {
 882     switch (o->valtype) {
 883     case 0:
 884     case '-':
 885         return "";
 886     case ':':
 887         return "uri";
 888     case 's':
 889         return "val";
 890     case '/':
 891         return "dir";
 892     case '<':
 893         return "infile";
 894     case '>':
 895         return "outfile";
 896     case 'p':
 897         return "+int";
 898     case 'n':
 899         return "int";
 900     case 'l':
 901         return "long";
 902     case 'u':
 903         return "ulong";
 904     case 'E':
 905         return "PEM|DER|ENGINE";
 906     case 'F':
 907         return "PEM|DER";
 908     case 'f':
 909         return "format";
 910     case 'M':
 911         return "intmax";
 912     case 'U':
 913         return "uintmax";
 914     }
 915     return "parm";
 916 }
 917
 918 void opt_print(const OPTIONS *o, int doingparams, int width)
 919 {
 920     const char* help;
 921     char start[80 + 1];
 922     char *p;
 923
 924         help = o->helpstr ? o->helpstr : "(No additional info)";
 925         if (o->name == OPT_HELP_STR) {
 926             opt_printf_stderr(help, prog);
 927             return;
 928         }
 929         if (o->name == OPT_SECTION_STR) {
 930             opt_printf_stderr("\n");
 931             opt_printf_stderr(help, prog);
 932             return;
 933         }
 934         if (o->name == OPT_PARAM_STR) {
 935             opt_printf_stderr("\nParameters:\n");
 936             return;
 937         }
 938
 939         /* Pad out prefix */
 940         memset(start, ' ', sizeof(start) - 1);
 941         start[sizeof(start) - 1] = '\0';
 942
 943         if (o->name == OPT_MORE_STR) {
 944             /* Continuation of previous line; pad and print. */
 945             start[width] = '\0';
 946             opt_printf_stderr("%s  %s\n", start, help);
 947             return;
 948         }
 949
 950         /* Build up the "-flag [param]" part. */
 951         p = start;
 952         *p++ = ' ';
 953         if (!doingparams)
 954             *p++ = '-';
 955         if (o->name[0])
 956             p += strlen(strcpy(p, o->name));
 957         else
 958             *p++ = '*';
 959         if (o->valtype != '-') {
 960             *p++ = ' ';
 961             p += strlen(strcpy(p, valtype2param(o)));
 962         }
 963         *p = ' ';
 964         if ((int)(p - start) >= MAX_OPT_HELP_WIDTH) {
 965             *p = '\0';
 966             opt_printf_stderr("%s\n", start);
 967             memset(start, ' ', sizeof(start));
 968         }
 969         start[width] = '\0';
 970         opt_printf_stderr("%s  %s\n", start, help);
 971 }
 972
 973 void opt_help(const OPTIONS *list)
 974 {
 975     const OPTIONS *o;
 976     int i, sawparams = 0, width = 5;
 977     int standard_prolog;
 978     char start[80 + 1];
 979
 980     /* Starts with its own help message? */
 981     standard_prolog = list[0].name != OPT_HELP_STR;
 982
 983     /* Find the widest help. */
 984     for (o = list; o->name; o++) {
 985         if (o->name == OPT_MORE_STR)
 986             continue;
 987         i = 2 + (int)strlen(o->name);
 988         if (o->valtype != '-')
 989             i += 1 + strlen(valtype2param(o));
 990         if (i < MAX_OPT_HELP_WIDTH && i > width)
 991             width = i;
 992         OPENSSL_assert(i < (int)sizeof(start));
 993     }
 994
 995     if (standard_prolog) {
 996         opt_printf_stderr("Usage: %s [options]\n", prog);
 997         if (list[0].name != OPT_SECTION_STR)
 998             opt_printf_stderr("Valid options are:\n", prog);
 999     }
1000
1001     /* Now let's print. */
1002     for (o = list; o->name; o++) {
1003         if (o->name == OPT_PARAM_STR)
1004             sawparams = 1;
1005         opt_print(o, sawparams, width);
1006     }
1007 }
1008
1009 /* opt_isdir section */
1010 #ifdef _WIN32
1011 # include <windows.h>
1012 int opt_isdir(const char *name)
1013 {
1014     DWORD attr;
1015 # if defined(UNICODE) || defined(_UNICODE)
1016     size_t i, len_0 = strlen(name) + 1;
1017     WCHAR tempname[MAX_PATH];
1018
1019     if (len_0 > MAX_PATH)
1020         return -1;
1021
1022 #  if !defined(_WIN32_WCE) || _WIN32_WCE>=101
1023     if (!MultiByteToWideChar(CP_ACP, 0, name, len_0, tempname, MAX_PATH))
1024 #  endif
1025         for (i = 0; i < len_0; i++)
1026             tempname[i] = (WCHAR)name[i];
1027
1028     attr = GetFileAttributes(tempname);
1029 # else
1030     attr = GetFileAttributes(name);
1031 # endif
1032     if (attr == INVALID_FILE_ATTRIBUTES)
1033         return -1;
1034     return ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0);
1035 }
1036 #else
1037 # include <sys/stat.h>
1038 # ifndef S_ISDIR
1039 #  if defined(_S_IFMT) && defined(_S_IFDIR)
1040 #   define S_ISDIR(a)   (((a) & _S_IFMT) == _S_IFDIR)
1041 #  else
1042 #   define S_ISDIR(a)   (((a) & S_IFMT) == S_IFDIR)
1043 #  endif
1044 # endif
1045
1046 int opt_isdir(const char *name)
1047 {
1048 # if defined(S_ISDIR)
1049     struct stat st;
1050
1051     if (stat(name, &st) == 0)
1052         return S_ISDIR(st.st_mode);
1053     else
1054         return -1;
1055 # else
1056     return -1;
1057 # endif
1058 }
1059 #endif