xref: /freebsd/crypto/openssl/apps/lib/opt.c (revision b64c5a0ace59af62eff52bfe110a521dc73c937b) 
1 /*
2  * Copyright 2015-2024 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 "app_libctx.h"
16 #include "internal/nelem.h"
17 #include "internal/numbers.h"
18 #include <string.h>
19 #if !defined(OPENSSL_SYS_MSDOS)
20 # include <unistd.h>
21 #endif
22 
23 #include <stdlib.h>
24 #include <errno.h>
25 #include <ctype.h>
26 #include <limits.h>
27 #include <openssl/err.h>
28 #include <openssl/bio.h>
29 #include <openssl/x509v3.h>
30 
31 #define MAX_OPT_HELP_WIDTH 30
32 const char OPT_HELP_STR[] = "-H";
33 const char OPT_MORE_STR[] = "-M";
34 const char OPT_SECTION_STR[] = "-S";
35 const char OPT_PARAM_STR[] = "-P";
36 
37 /* Our state */
38 static char **argv;
39 static int argc;
40 static int opt_index;
41 static char *arg;
42 static char *flag;
43 static char *dunno;
44 static const OPTIONS *unknown;
45 static const OPTIONS *opts;
46 static char prog[40];
47 
48 /*
49  * Return the simple name of the program; removing various platform gunk.
50  */
51 #if defined(OPENSSL_SYS_WIN32)
52 
53 const char *opt_path_end(const char *filename)
54 {
55     const char *p;
56 
57     /* find the last '/', '\' or ':' */
58     for (p = filename + strlen(filename); --p > filename; )
59         if (*p == '/' || *p == '\\' || *p == ':') {
60             p++;
61             break;
62         }
63     return p;
64 }
65 
66 char *opt_progname(const char *argv0)
67 {
68     size_t i, n;
69     const char *p;
70     char *q;
71 
72     p = opt_path_end(argv0);
73 
74     /* Strip off trailing nonsense. */
75     n = strlen(p);
76     if (n > 4 &&
77         (strcmp(&p[n - 4], ".exe") == 0 || strcmp(&p[n - 4], ".EXE") == 0))
78         n -= 4;
79 
80     /* Copy over the name, in lowercase. */
81     if (n > sizeof(prog) - 1)
82         n = sizeof(prog) - 1;
83     for (q = prog, i = 0; i < n; i++, p++)
84         *q++ = tolower((unsigned char)*p);
85     *q = '\0';
86     return prog;
87 }
88 
89 #elif defined(OPENSSL_SYS_VMS)
90 
91 const char *opt_path_end(const char *filename)
92 {
93     const char *p;
94 
95     /* Find last special character sys:[foo.bar]openssl */
96     for (p = filename + strlen(filename); --p > filename;)
97         if (*p == ':' || *p == ']' || *p == '>') {
98             p++;
99             break;
100         }
101     return p;
102 }
103 
104 char *opt_progname(const char *argv0)
105 {
106     const char *p, *q;
107 
108     /* Find last special character sys:[foo.bar]openssl */
109     p = opt_path_end(argv0);
110     q = strrchr(p, '.');
111     if (prog != p)
112         strncpy(prog, p, sizeof(prog) - 1);
113     prog[sizeof(prog) - 1] = '\0';
114     if (q != NULL && q - p < sizeof(prog))
115         prog[q - p] = '\0';
116     return prog;
117 }
118 
119 #else
120 
121 const char *opt_path_end(const char *filename)
122 {
123     const char *p;
124 
125     /* Could use strchr, but this is like the ones above. */
126     for (p = filename + strlen(filename); --p > filename;)
127         if (*p == '/') {
128             p++;
129             break;
130         }
131     return p;
132 }
133 
134 char *opt_progname(const char *argv0)
135 {
136     const char *p;
137 
138     p = opt_path_end(argv0);
139     if (prog != p)
140         strncpy(prog, p, sizeof(prog) - 1);
141     prog[sizeof(prog) - 1] = '\0';
142     return prog;
143 }
144 #endif
145 
146 char *opt_appname(const char *argv0)
147 {
148     size_t len = strlen(prog);
149 
150     if (argv0 != NULL)
151         BIO_snprintf(prog + len, sizeof(prog) - len - 1, " %s", argv0);
152     return prog;
153 }
154 
155 char *opt_getprog(void)
156 {
157     return prog;
158 }
159 
160 /* Set up the arg parsing. */
161 char *opt_init(int ac, char **av, const OPTIONS *o)
162 {
163     /* Store state. */
164     argc = ac;
165     argv = av;
166     opt_begin();
167     opts = o;
168     unknown = NULL;
169 
170     /* Make sure prog name is set for usage output */
171     (void)opt_progname(argv[0]);
172 
173     /* Check all options up until the PARAM marker (if present) */
174     for (; o->name != NULL && o->name != OPT_PARAM_STR; ++o) {
175 #ifndef NDEBUG
176         const OPTIONS *next;
177         int duplicated, i;
178 #endif
179 
180         if (o->name == OPT_HELP_STR
181                 || o->name == OPT_MORE_STR
182                 || o->name == OPT_SECTION_STR)
183             continue;
184 #ifndef NDEBUG
185         i = o->valtype;
186 
187         /* Make sure options are legit. */
188         OPENSSL_assert(o->name[0] != '-');
189         if (o->valtype == '.')
190             OPENSSL_assert(o->retval == OPT_PARAM);
191         else
192             OPENSSL_assert(o->retval == OPT_DUP || o->retval > OPT_PARAM);
193         switch (i) {
194         case   0: case '-': case '.':
195         case '/': case '<': case '>': case 'E': case 'F':
196         case 'M': case 'U': case 'f': case 'l': case 'n': case 'p': case 's':
197         case 'u': case 'c': case ':': case 'N':
198             break;
199         default:
200             OPENSSL_assert(0);
201         }
202 
203         /* Make sure there are no duplicates. */
204         for (next = o + 1; next->name; ++next) {
205             /*
206              * Some compilers inline strcmp and the assert string is too long.
207              */
208             duplicated = next->retval != OPT_DUP
209                 && strcmp(o->name, next->name) == 0;
210             if (duplicated) {
211                 opt_printf_stderr("%s: Internal error: duplicate option %s\n",
212                                   prog, o->name);
213                 OPENSSL_assert(!duplicated);
214             }
215         }
216 #endif
217         if (o->name[0] == '\0') {
218             OPENSSL_assert(unknown == NULL);
219             unknown = o;
220             OPENSSL_assert(unknown->valtype == 0 || unknown->valtype == '-');
221         }
222     }
223     return prog;
224 }
225 
226 static OPT_PAIR formats[] = {
227     {"PEM/DER", OPT_FMT_PEMDER},
228     {"pkcs12", OPT_FMT_PKCS12},
229     {"smime", OPT_FMT_SMIME},
230     {"engine", OPT_FMT_ENGINE},
231     {"msblob", OPT_FMT_MSBLOB},
232     {"nss", OPT_FMT_NSS},
233     {"text", OPT_FMT_TEXT},
234     {"http", OPT_FMT_HTTP},
235     {"pvk", OPT_FMT_PVK},
236     {NULL}
237 };
238 
239 /* Print an error message about a failed format parse. */
240 static int opt_format_error(const char *s, unsigned long flags)
241 {
242     OPT_PAIR *ap;
243 
244     if (flags == OPT_FMT_PEMDER) {
245         opt_printf_stderr("%s: Bad format \"%s\"; must be pem or der\n",
246                           prog, s);
247     } else {
248         opt_printf_stderr("%s: Bad format \"%s\"; must be one of:\n",
249                           prog, s);
250         for (ap = formats; ap->name; ap++)
251             if (flags & ap->retval)
252                 opt_printf_stderr("   %s\n", ap->name);
253     }
254     return 0;
255 }
256 
257 /* Parse a format string, put it into *result; return 0 on failure, else 1. */
258 int opt_format(const char *s, unsigned long flags, int *result)
259 {
260     switch (*s) {
261     default:
262         opt_printf_stderr("%s: Bad format \"%s\"\n", prog, s);
263         return 0;
264     case 'D':
265     case 'd':
266         if ((flags & OPT_FMT_PEMDER) == 0)
267             return opt_format_error(s, flags);
268         *result = FORMAT_ASN1;
269         break;
270     case 'T':
271     case 't':
272         if ((flags & OPT_FMT_TEXT) == 0)
273             return opt_format_error(s, flags);
274         *result = FORMAT_TEXT;
275         break;
276     case 'N':
277     case 'n':
278         if ((flags & OPT_FMT_NSS) == 0)
279             return opt_format_error(s, flags);
280         if (strcmp(s, "NSS") != 0 && strcmp(s, "nss") != 0)
281             return opt_format_error(s, flags);
282         *result = FORMAT_NSS;
283         break;
284     case 'S':
285     case 's':
286         if ((flags & OPT_FMT_SMIME) == 0)
287             return opt_format_error(s, flags);
288         *result = FORMAT_SMIME;
289         break;
290     case 'M':
291     case 'm':
292         if ((flags & OPT_FMT_MSBLOB) == 0)
293             return opt_format_error(s, flags);
294         *result = FORMAT_MSBLOB;
295         break;
296     case 'E':
297     case 'e':
298         if ((flags & OPT_FMT_ENGINE) == 0)
299             return opt_format_error(s, flags);
300         *result = FORMAT_ENGINE;
301         break;
302     case 'H':
303     case 'h':
304         if ((flags & OPT_FMT_HTTP) == 0)
305             return opt_format_error(s, flags);
306         *result = FORMAT_HTTP;
307         break;
308     case '1':
309         if ((flags & OPT_FMT_PKCS12) == 0)
310             return opt_format_error(s, flags);
311         *result = FORMAT_PKCS12;
312         break;
313     case 'P':
314     case 'p':
315         if (s[1] == '\0' || strcmp(s, "PEM") == 0 || strcmp(s, "pem") == 0) {
316             if ((flags & OPT_FMT_PEMDER) == 0)
317                 return opt_format_error(s, flags);
318             *result = FORMAT_PEM;
319         } else if (strcmp(s, "PVK") == 0 || strcmp(s, "pvk") == 0) {
320             if ((flags & OPT_FMT_PVK) == 0)
321                 return opt_format_error(s, flags);
322             *result = FORMAT_PVK;
323         } else if (strcmp(s, "P12") == 0 || strcmp(s, "p12") == 0
324                    || strcmp(s, "PKCS12") == 0 || strcmp(s, "pkcs12") == 0) {
325             if ((flags & OPT_FMT_PKCS12) == 0)
326                 return opt_format_error(s, flags);
327             *result = FORMAT_PKCS12;
328         } else {
329             opt_printf_stderr("%s: Bad format \"%s\"\n", prog, s);
330             return 0;
331         }
332         break;
333     }
334     return 1;
335 }
336 
337 /* Return string representing the given format. */
338 static const char *format2str(int format)
339 {
340     switch (format) {
341     default:
342         return "(undefined)";
343     case FORMAT_PEM:
344         return "PEM";
345     case FORMAT_ASN1:
346         return "DER";
347     case FORMAT_TEXT:
348         return "TEXT";
349     case FORMAT_NSS:
350         return "NSS";
351     case FORMAT_SMIME:
352         return "SMIME";
353     case FORMAT_MSBLOB:
354         return "MSBLOB";
355     case FORMAT_ENGINE:
356         return "ENGINE";
357     case FORMAT_HTTP:
358         return "HTTP";
359     case FORMAT_PKCS12:
360         return "P12";
361     case FORMAT_PVK:
362         return "PVK";
363     }
364 }
365 
366 /* Print an error message about unsuitable/unsupported format requested. */
367 void print_format_error(int format, unsigned long flags)
368 {
369     (void)opt_format_error(format2str(format), flags);
370 }
371 
372 /*
373  * Parse a cipher name, put it in *cipherp after freeing what was there, if
374  * cipherp is not NULL.  Return 0 on failure, else 1.
375  */
376 int opt_cipher_silent(const char *name, EVP_CIPHER **cipherp)
377 {
378     EVP_CIPHER *c;
379 
380     ERR_set_mark();
381     if ((c = EVP_CIPHER_fetch(app_get0_libctx(), name,
382                               app_get0_propq())) != NULL
383         || (opt_legacy_okay()
384             && (c = (EVP_CIPHER *)EVP_get_cipherbyname(name)) != NULL)) {
385         ERR_pop_to_mark();
386         if (cipherp != NULL) {
387             EVP_CIPHER_free(*cipherp);
388             *cipherp = c;
389         } else {
390             EVP_CIPHER_free(c);
391         }
392         return 1;
393     }
394     ERR_clear_last_mark();
395     return 0;
396 }
397 
398 int opt_cipher_any(const char *name, EVP_CIPHER **cipherp)
399 {
400     int ret;
401 
402     if ((ret = opt_cipher_silent(name, cipherp)) == 0)
403         opt_printf_stderr("%s: Unknown cipher: %s\n", prog, name);
404     return ret;
405 }
406 
407 int opt_cipher(const char *name, EVP_CIPHER **cipherp)
408 {
409      int mode, ret = 0;
410      unsigned long int flags;
411      EVP_CIPHER *c = NULL;
412 
413      if (opt_cipher_any(name, &c)) {
414         mode = EVP_CIPHER_get_mode(c);
415         flags = EVP_CIPHER_get_flags(c);
416         if (mode == EVP_CIPH_XTS_MODE) {
417             opt_printf_stderr("%s XTS ciphers not supported\n", prog);
418         } else if ((flags & EVP_CIPH_FLAG_AEAD_CIPHER) != 0) {
419             opt_printf_stderr("%s: AEAD ciphers not supported\n", prog);
420         } else {
421             ret = 1;
422             if (cipherp != NULL)
423                 *cipherp = c;
424         }
425     }
426     return ret;
427 }
428 
429 /*
430  * Parse message digest name, put it in *EVP_MD; return 0 on failure, else 1.
431  */
432 int opt_md_silent(const char *name, EVP_MD **mdp)
433 {
434     EVP_MD *md;
435 
436     ERR_set_mark();
437     if ((md = EVP_MD_fetch(app_get0_libctx(), name, app_get0_propq())) != NULL
438         || (opt_legacy_okay()
439             && (md = (EVP_MD *)EVP_get_digestbyname(name)) != NULL)) {
440         ERR_pop_to_mark();
441         if (mdp != NULL) {
442             EVP_MD_free(*mdp);
443             *mdp = md;
444         } else {
445             EVP_MD_free(md);
446         }
447         return 1;
448     }
449     ERR_clear_last_mark();
450     return 0;
451 }
452 
453 int opt_md(const char *name, EVP_MD **mdp)
454 {
455     int ret;
456 
457     if ((ret = opt_md_silent(name, mdp)) == 0)
458         opt_printf_stderr("%s: Unknown option or message digest: %s\n", prog,
459                           name != NULL ? name : "\"\"");
460     return ret;
461 }
462 
463 /* Look through a list of name/value pairs. */
464 int opt_pair(const char *name, const OPT_PAIR* pairs, int *result)
465 {
466     const OPT_PAIR *pp;
467 
468     for (pp = pairs; pp->name; pp++)
469         if (strcmp(pp->name, name) == 0) {
470             *result = pp->retval;
471             return 1;
472         }
473     opt_printf_stderr("%s: Value must be one of:\n", prog);
474     for (pp = pairs; pp->name; pp++)
475         opt_printf_stderr("\t%s\n", pp->name);
476     return 0;
477 }
478 
479 /* Look through a list of valid names */
480 int opt_string(const char *name, const char **options)
481 {
482     const char **p;
483 
484     for (p = options; *p != NULL; p++)
485         if (strcmp(*p, name) == 0)
486             return 1;
487     opt_printf_stderr("%s: Value must be one of:\n", prog);
488     for (p = options; *p != NULL; p++)
489         opt_printf_stderr("\t%s\n", *p);
490     return 0;
491 }
492 
493 /* Parse an int, put it into *result; return 0 on failure, else 1. */
494 int opt_int(const char *value, int *result)
495 {
496     long l;
497 
498     if (!opt_long(value, &l))
499         return 0;
500     *result = (int)l;
501     if (*result != l) {
502         opt_printf_stderr("%s: Value \"%s\" outside integer range\n",
503                           prog, value);
504         return 0;
505     }
506     return 1;
507 }
508 
509 /* Parse and return an integer, assuming range has been checked before. */
510 int opt_int_arg(void)
511 {
512     int result = -1;
513 
514     (void)opt_int(arg, &result);
515     return result;
516 }
517 
518 static void opt_number_error(const char *v)
519 {
520     size_t i = 0;
521     struct strstr_pair_st {
522         char *prefix;
523         char *name;
524     } b[] = {
525         {"0x", "a hexadecimal"},
526         {"0X", "a hexadecimal"},
527         {"0", "an octal"}
528     };
529 
530     for (i = 0; i < OSSL_NELEM(b); i++) {
531         if (strncmp(v, b[i].prefix, strlen(b[i].prefix)) == 0) {
532             opt_printf_stderr("%s: Can't parse \"%s\" as %s number\n",
533                               prog, v, b[i].name);
534             return;
535         }
536     }
537     opt_printf_stderr("%s: Can't parse \"%s\" as a number\n", prog, v);
538     return;
539 }
540 
541 /* Parse a long, put it into *result; return 0 on failure, else 1. */
542 int opt_long(const char *value, long *result)
543 {
544     int oerrno = errno;
545     long l;
546     char *endp;
547 
548     errno = 0;
549     l = strtol(value, &endp, 0);
550     if (*endp
551             || endp == value
552             || ((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE)
553             || (l == 0 && errno != 0)) {
554         opt_number_error(value);
555         errno = oerrno;
556         return 0;
557     }
558     *result = l;
559     errno = oerrno;
560     return 1;
561 }
562 
563 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L && \
564     defined(INTMAX_MAX) && defined(UINTMAX_MAX) && \
565     !defined(OPENSSL_NO_INTTYPES_H)
566 
567 /* Parse an intmax_t, put it into *result; return 0 on failure, else 1. */
568 int opt_intmax(const char *value, ossl_intmax_t *result)
569 {
570     int oerrno = errno;
571     intmax_t m;
572     char *endp;
573 
574     errno = 0;
575     m = strtoimax(value, &endp, 0);
576     if (*endp
577             || endp == value
578             || ((m == INTMAX_MAX || m == INTMAX_MIN)
579                 && errno == ERANGE)
580             || (m == 0 && errno != 0)) {
581         opt_number_error(value);
582         errno = oerrno;
583         return 0;
584     }
585     /* Ensure that the value in |m| is never too big for |*result| */
586     if (sizeof(m) > sizeof(*result)
587         && (m < OSSL_INTMAX_MIN || m > OSSL_INTMAX_MAX)) {
588         opt_number_error(value);
589         return 0;
590     }
591     *result = (ossl_intmax_t)m;
592     errno = oerrno;
593     return 1;
594 }
595 
596 /* Parse a uintmax_t, put it into *result; return 0 on failure, else 1. */
597 int opt_uintmax(const char *value, ossl_uintmax_t *result)
598 {
599     int oerrno = errno;
600     uintmax_t m;
601     char *endp;
602 
603     errno = 0;
604     m = strtoumax(value, &endp, 0);
605     if (*endp
606             || endp == value
607             || (m == UINTMAX_MAX && errno == ERANGE)
608             || (m == 0 && errno != 0)) {
609         opt_number_error(value);
610         errno = oerrno;
611         return 0;
612     }
613     /* Ensure that the value in |m| is never too big for |*result| */
614     if (sizeof(m) > sizeof(*result)
615         && m > OSSL_UINTMAX_MAX) {
616         opt_number_error(value);
617         return 0;
618     }
619     *result = (ossl_uintmax_t)m;
620     errno = oerrno;
621     return 1;
622 }
623 #else
624 /* Fallback implementations based on long */
625 int opt_intmax(const char *value, ossl_intmax_t *result)
626 {
627     long m;
628     int ret;
629 
630     if ((ret = opt_long(value, &m)))
631         *result = m;
632     return ret;
633 }
634 
635 int opt_uintmax(const char *value, ossl_uintmax_t *result)
636 {
637     unsigned long m;
638     int ret;
639 
640     if ((ret = opt_ulong(value, &m)))
641         *result = m;
642     return ret;
643 }
644 #endif
645 
646 /*
647  * Parse an unsigned long, put it into *result; return 0 on failure, else 1.
648  */
649 int opt_ulong(const char *value, unsigned long *result)
650 {
651     int oerrno = errno;
652     char *endptr;
653     unsigned long l;
654 
655     errno = 0;
656     l = strtoul(value, &endptr, 0);
657     if (*endptr
658             || endptr == value
659             || ((l == ULONG_MAX) && errno == ERANGE)
660             || (l == 0 && errno != 0)) {
661         opt_number_error(value);
662         errno = oerrno;
663         return 0;
664     }
665     *result = l;
666     errno = oerrno;
667     return 1;
668 }
669 
670 /*
671  * We pass opt as an int but cast it to "enum range" so that all the
672  * items in the OPT_V_ENUM enumeration are caught; this makes -Wswitch
673  * in gcc do the right thing.
674  */
675 enum range { OPT_V_ENUM };
676 
677 int opt_verify(int opt, X509_VERIFY_PARAM *vpm)
678 {
679     int i;
680     ossl_intmax_t t = 0;
681     ASN1_OBJECT *otmp;
682     X509_PURPOSE *xptmp;
683     const X509_VERIFY_PARAM *vtmp;
684 
685     OPENSSL_assert(vpm != NULL);
686     OPENSSL_assert(opt > OPT_V__FIRST);
687     OPENSSL_assert(opt < OPT_V__LAST);
688 
689     switch ((enum range)opt) {
690     case OPT_V__FIRST:
691     case OPT_V__LAST:
692         return 0;
693     case OPT_V_POLICY:
694         otmp = OBJ_txt2obj(opt_arg(), 0);
695         if (otmp == NULL) {
696             opt_printf_stderr("%s: Invalid Policy %s\n", prog, opt_arg());
697             return 0;
698         }
699         if (!X509_VERIFY_PARAM_add0_policy(vpm, otmp)) {
700             ASN1_OBJECT_free(otmp);
701             opt_printf_stderr("%s: Internal error adding Policy %s\n",
702                               prog, opt_arg());
703             return 0;
704         }
705         break;
706     case OPT_V_PURPOSE:
707         /* purpose name -> purpose index */
708         i = X509_PURPOSE_get_by_sname(opt_arg());
709         if (i < 0) {
710             opt_printf_stderr("%s: Invalid purpose %s\n", prog, opt_arg());
711             return 0;
712         }
713 
714         /* purpose index -> purpose object */
715         xptmp = X509_PURPOSE_get0(i);
716 
717         /* purpose object -> purpose value */
718         i = X509_PURPOSE_get_id(xptmp);
719 
720         if (!X509_VERIFY_PARAM_set_purpose(vpm, i)) {
721             opt_printf_stderr("%s: Internal error setting purpose %s\n",
722                               prog, opt_arg());
723             return 0;
724         }
725         break;
726     case OPT_V_VERIFY_NAME:
727         vtmp = X509_VERIFY_PARAM_lookup(opt_arg());
728         if (vtmp == NULL) {
729             opt_printf_stderr("%s: Invalid verify name %s\n",
730                               prog, opt_arg());
731             return 0;
732         }
733         X509_VERIFY_PARAM_set1(vpm, vtmp);
734         break;
735     case OPT_V_VERIFY_DEPTH:
736         i = atoi(opt_arg());
737         if (i >= 0)
738             X509_VERIFY_PARAM_set_depth(vpm, i);
739         break;
740     case OPT_V_VERIFY_AUTH_LEVEL:
741         i = atoi(opt_arg());
742         if (i >= 0)
743             X509_VERIFY_PARAM_set_auth_level(vpm, i);
744         break;
745     case OPT_V_ATTIME:
746         if (!opt_intmax(opt_arg(), &t))
747             return 0;
748         if (t != (time_t)t) {
749             opt_printf_stderr("%s: epoch time out of range %s\n",
750                               prog, opt_arg());
751             return 0;
752         }
753         X509_VERIFY_PARAM_set_time(vpm, (time_t)t);
754         break;
755     case OPT_V_VERIFY_HOSTNAME:
756         if (!X509_VERIFY_PARAM_set1_host(vpm, opt_arg(), 0))
757             return 0;
758         break;
759     case OPT_V_VERIFY_EMAIL:
760         if (!X509_VERIFY_PARAM_set1_email(vpm, opt_arg(), 0))
761             return 0;
762         break;
763     case OPT_V_VERIFY_IP:
764         if (!X509_VERIFY_PARAM_set1_ip_asc(vpm, opt_arg()))
765             return 0;
766         break;
767     case OPT_V_IGNORE_CRITICAL:
768         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_IGNORE_CRITICAL);
769         break;
770     case OPT_V_ISSUER_CHECKS:
771         /* NOP, deprecated */
772         break;
773     case OPT_V_CRL_CHECK:
774         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_CRL_CHECK);
775         break;
776     case OPT_V_CRL_CHECK_ALL:
777         X509_VERIFY_PARAM_set_flags(vpm,
778                                     X509_V_FLAG_CRL_CHECK |
779                                     X509_V_FLAG_CRL_CHECK_ALL);
780         break;
781     case OPT_V_POLICY_CHECK:
782         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_POLICY_CHECK);
783         break;
784     case OPT_V_EXPLICIT_POLICY:
785         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_EXPLICIT_POLICY);
786         break;
787     case OPT_V_INHIBIT_ANY:
788         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_INHIBIT_ANY);
789         break;
790     case OPT_V_INHIBIT_MAP:
791         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_INHIBIT_MAP);
792         break;
793     case OPT_V_X509_STRICT:
794         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_X509_STRICT);
795         break;
796     case OPT_V_EXTENDED_CRL:
797         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_EXTENDED_CRL_SUPPORT);
798         break;
799     case OPT_V_USE_DELTAS:
800         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_USE_DELTAS);
801         break;
802     case OPT_V_POLICY_PRINT:
803         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_NOTIFY_POLICY);
804         break;
805     case OPT_V_CHECK_SS_SIG:
806         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_CHECK_SS_SIGNATURE);
807         break;
808     case OPT_V_TRUSTED_FIRST:
809         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_TRUSTED_FIRST);
810         break;
811     case OPT_V_SUITEB_128_ONLY:
812         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_SUITEB_128_LOS_ONLY);
813         break;
814     case OPT_V_SUITEB_128:
815         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_SUITEB_128_LOS);
816         break;
817     case OPT_V_SUITEB_192:
818         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_SUITEB_192_LOS);
819         break;
820     case OPT_V_PARTIAL_CHAIN:
821         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_PARTIAL_CHAIN);
822         break;
823     case OPT_V_NO_ALT_CHAINS:
824         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_NO_ALT_CHAINS);
825         break;
826     case OPT_V_NO_CHECK_TIME:
827         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_NO_CHECK_TIME);
828         break;
829     case OPT_V_ALLOW_PROXY_CERTS:
830         X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_ALLOW_PROXY_CERTS);
831         break;
832     }
833     return 1;
834 
835 }
836 
837 void opt_begin(void)
838 {
839     opt_index = 1;
840     arg = NULL;
841     flag = NULL;
842 }
843 
844 /*
845  * Parse the next flag (and value if specified), return 0 if done, -1 on
846  * error, otherwise the flag's retval.
847  */
848 int opt_next(void)
849 {
850     char *p;
851     const OPTIONS *o;
852     int ival;
853     long lval;
854     unsigned long ulval;
855     ossl_intmax_t imval;
856     ossl_uintmax_t umval;
857 
858     /* Look at current arg; at end of the list? */
859     arg = NULL;
860     p = argv[opt_index];
861     if (p == NULL)
862         return 0;
863 
864     /* If word doesn't start with a -, we're done. */
865     if (*p != '-')
866         return 0;
867 
868     /* Hit "--" ? We're done. */
869     opt_index++;
870     if (strcmp(p, "--") == 0)
871         return 0;
872 
873     /* Allow -nnn and --nnn */
874     if (*++p == '-')
875         p++;
876     flag = p - 1;
877 
878     /* If we have --flag=foo, snip it off */
879     if ((arg = strchr(p, '=')) != NULL)
880         *arg++ = '\0';
881     for (o = opts; o->name; ++o) {
882         /* If not this option, move on to the next one. */
883         if (!(strcmp(p, "h") == 0 && strcmp(o->name, "help") == 0)
884                 && strcmp(p, o->name) != 0)
885             continue;
886 
887         /* If it doesn't take a value, make sure none was given. */
888         if (o->valtype == 0 || o->valtype == '-') {
889             if (arg) {
890                 opt_printf_stderr("%s: Option -%s does not take a value\n",
891                                   prog, p);
892                 return -1;
893             }
894             return o->retval;
895         }
896 
897         /* Want a value; get the next param if =foo not used. */
898         if (arg == NULL) {
899             if (argv[opt_index] == NULL) {
900                 opt_printf_stderr("%s: Option -%s needs a value\n",
901                                   prog, o->name);
902                 return -1;
903             }
904             arg = argv[opt_index++];
905         }
906 
907         /* Syntax-check value. */
908         switch (o->valtype) {
909         default:
910         case 's':
911         case ':':
912             /* Just a string. */
913             break;
914         case '.':
915             /* Parameters */
916             break;
917         case '/':
918             if (opt_isdir(arg) > 0)
919                 break;
920             opt_printf_stderr("%s: Not a directory: %s\n", prog, arg);
921             return -1;
922         case '<':
923             /* Input file. */
924             break;
925         case '>':
926             /* Output file. */
927             break;
928         case 'p':
929         case 'n':
930         case 'N':
931             if (!opt_int(arg, &ival))
932                 return -1;
933             if (o->valtype == 'p' && ival <= 0) {
934                 opt_printf_stderr("%s: Non-positive number \"%s\" for option -%s\n",
935                                   prog, arg, o->name);
936                 return -1;
937             }
938             if (o->valtype == 'N' && ival < 0) {
939                 opt_printf_stderr("%s: Negative number \"%s\" for option -%s\n",
940                                   prog, arg, o->name);
941                 return -1;
942             }
943             break;
944         case 'M':
945             if (!opt_intmax(arg, &imval))
946                 return -1;
947             break;
948         case 'U':
949             if (!opt_uintmax(arg, &umval))
950                 return -1;
951             break;
952         case 'l':
953             if (!opt_long(arg, &lval))
954                 return -1;
955             break;
956         case 'u':
957             if (!opt_ulong(arg, &ulval))
958                 return -1;
959             break;
960         case 'c':
961         case 'E':
962         case 'F':
963         case 'f':
964             if (opt_format(arg,
965                            o->valtype == 'c' ? OPT_FMT_PDS :
966                            o->valtype == 'E' ? OPT_FMT_PDE :
967                            o->valtype == 'F' ? OPT_FMT_PEMDER
968                            : OPT_FMT_ANY, &ival))
969                 break;
970             opt_printf_stderr("%s: Invalid format \"%s\" for option -%s\n",
971                               prog, arg, o->name);
972             return -1;
973         }
974 
975         /* Return the flag value. */
976         return o->retval;
977     }
978     if (unknown != NULL) {
979         dunno = p;
980         return unknown->retval;
981     }
982     opt_printf_stderr("%s: Unknown option: -%s\n", prog, p);
983     return -1;
984 }
985 
986 /* Return the most recent flag parameter. */
987 char *opt_arg(void)
988 {
989     return arg;
990 }
991 
992 /* Return the most recent flag (option name including the preceding '-'). */
993 char *opt_flag(void)
994 {
995     return flag;
996 }
997 
998 /* Return the unknown option. */
999 char *opt_unknown(void)
1000 {
1001     return dunno;
1002 }
1003 
1004 /* Return the rest of the arguments after parsing flags. */
1005 char **opt_rest(void)
1006 {
1007     return &argv[opt_index];
1008 }
1009 
1010 /* How many items in remaining args? */
1011 int opt_num_rest(void)
1012 {
1013     int i = 0;
1014     char **pp;
1015 
1016     for (pp = opt_rest(); *pp; pp++, i++)
1017         continue;
1018     return i;
1019 }
1020 
1021 /* Return a string describing the parameter type. */
1022 static const char *valtype2param(const OPTIONS *o)
1023 {
1024     switch (o->valtype) {
1025     case 0:
1026     case '-':
1027         return "";
1028     case ':':
1029         return "uri";
1030     case 's':
1031         return "val";
1032     case '/':
1033         return "dir";
1034     case '<':
1035         return "infile";
1036     case '>':
1037         return "outfile";
1038     case 'p':
1039         return "+int";
1040     case 'n':
1041         return "int";
1042     case 'l':
1043         return "long";
1044     case 'u':
1045         return "ulong";
1046     case 'E':
1047         return "PEM|DER|ENGINE";
1048     case 'F':
1049         return "PEM|DER";
1050     case 'f':
1051         return "format";
1052     case 'M':
1053         return "intmax";
1054     case 'N':
1055         return "nonneg";
1056     case 'U':
1057         return "uintmax";
1058     }
1059     return "parm";
1060 }
1061 
1062 static void opt_print(const OPTIONS *o, int doingparams, int width)
1063 {
1064     const char* help;
1065     char start[80 + 1];
1066     char *p;
1067 
1068         help = o->helpstr ? o->helpstr : "(No additional info)";
1069         if (o->name == OPT_HELP_STR) {
1070             opt_printf_stderr(help, prog);
1071             return;
1072         }
1073         if (o->name == OPT_SECTION_STR) {
1074             opt_printf_stderr("\n");
1075             opt_printf_stderr(help, prog);
1076             return;
1077         }
1078         if (o->name == OPT_PARAM_STR) {
1079             opt_printf_stderr("\nParameters:\n");
1080             return;
1081         }
1082 
1083         /* Pad out prefix */
1084         memset(start, ' ', sizeof(start) - 1);
1085         start[sizeof(start) - 1] = '\0';
1086 
1087         if (o->name == OPT_MORE_STR) {
1088             /* Continuation of previous line; pad and print. */
1089             start[width] = '\0';
1090             opt_printf_stderr("%s  %s\n", start, help);
1091             return;
1092         }
1093 
1094         /* Build up the "-flag [param]" part. */
1095         p = start;
1096         *p++ = ' ';
1097         if (!doingparams)
1098             *p++ = '-';
1099         if (o->name[0])
1100             p += strlen(strcpy(p, o->name));
1101         else
1102             *p++ = '*';
1103         if (o->valtype != '-') {
1104             *p++ = ' ';
1105             p += strlen(strcpy(p, valtype2param(o)));
1106         }
1107         *p = ' ';
1108         if ((int)(p - start) >= MAX_OPT_HELP_WIDTH) {
1109             *p = '\0';
1110             opt_printf_stderr("%s\n", start);
1111             memset(start, ' ', sizeof(start));
1112         }
1113         start[width] = '\0';
1114         opt_printf_stderr("%s  %s\n", start, help);
1115 }
1116 
1117 void opt_help(const OPTIONS *list)
1118 {
1119     const OPTIONS *o;
1120     int i, sawparams = 0, width = 5;
1121     int standard_prolog;
1122     char start[80 + 1];
1123 
1124     /* Starts with its own help message? */
1125     standard_prolog = list[0].name != OPT_HELP_STR;
1126 
1127     /* Find the widest help. */
1128     for (o = list; o->name; o++) {
1129         if (o->name == OPT_MORE_STR)
1130             continue;
1131         i = 2 + (int)strlen(o->name);
1132         if (o->valtype != '-')
1133             i += 1 + strlen(valtype2param(o));
1134         if (i < MAX_OPT_HELP_WIDTH && i > width)
1135             width = i;
1136         OPENSSL_assert(i < (int)sizeof(start));
1137     }
1138 
1139     if (standard_prolog) {
1140         opt_printf_stderr("Usage: %s [options]\n", prog);
1141         if (list[0].name != OPT_SECTION_STR)
1142             opt_printf_stderr("Valid options are:\n", prog);
1143     }
1144 
1145     /* Now let's print. */
1146     for (o = list; o->name; o++) {
1147         if (o->name == OPT_PARAM_STR)
1148             sawparams = 1;
1149         opt_print(o, sawparams, width);
1150     }
1151 }
1152 
1153 /* opt_isdir section */
1154 #ifdef _WIN32
1155 # include <windows.h>
1156 int opt_isdir(const char *name)
1157 {
1158     DWORD attr;
1159 # if defined(UNICODE) || defined(_UNICODE)
1160     size_t i, len_0 = strlen(name) + 1;
1161     WCHAR tempname[MAX_PATH];
1162 
1163     if (len_0 > MAX_PATH)
1164         return -1;
1165 
1166 #  if !defined(_WIN32_WCE) || _WIN32_WCE>=101
1167     if (!MultiByteToWideChar(CP_ACP, 0, name, len_0, tempname, MAX_PATH))
1168 #  endif
1169         for (i = 0; i < len_0; i++)
1170             tempname[i] = (WCHAR)name[i];
1171 
1172     attr = GetFileAttributes(tempname);
1173 # else
1174     attr = GetFileAttributes(name);
1175 # endif
1176     if (attr == INVALID_FILE_ATTRIBUTES)
1177         return -1;
1178     return ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0);
1179 }
1180 #else
1181 # include <sys/stat.h>
1182 # ifndef S_ISDIR
1183 #  if defined(_S_IFMT) && defined(_S_IFDIR)
1184 #   define S_ISDIR(a)   (((a) & _S_IFMT) == _S_IFDIR)
1185 #  else
1186 #   define S_ISDIR(a)   (((a) & S_IFMT) == S_IFDIR)
1187 #  endif
1188 # endif
1189 
1190 int opt_isdir(const char *name)
1191 {
1192 # if defined(S_ISDIR)
1193     struct stat st;
1194 
1195     if (stat(name, &st) == 0)
1196         return S_ISDIR(st.st_mode);
1197     else
1198         return -1;
1199 # else
1200     return -1;
1201 # endif
1202 }
1203 #endif
1204