aboutsummaryrefslogtreecommitdiff
path: root/src/tool_paramhlp.c
blob: af47516b62e0a55fea10c9b6271c98c04d720910 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ***************************************************************************/
#include "tool_setup.h"

#include "strcase.h"

#define ENABLE_CURLX_PRINTF
/* use our own printf() functions */
#include "curlx.h"

#include "tool_cfgable.h"
#include "tool_getparam.h"
#include "tool_getpass.h"
#include "tool_homedir.h"
#include "tool_msgs.h"
#include "tool_paramhlp.h"
#include "tool_version.h"

#include "memdebug.h" /* keep this as LAST include */

struct getout *new_getout(struct OperationConfig *config)
{
  struct getout *node = calloc(1, sizeof(struct getout));
  struct getout *last = config->url_last;
  if(node) {
    /* append this new node last in the list */
    if(last)
      last->next = node;
    else
      config->url_list = node; /* first node */

    /* move the last pointer */
    config->url_last = node;

    node->flags = config->default_node_flags;
  }
  return node;
}

ParameterError file2string(char **bufp, FILE *file)
{
  char *string = NULL;
  if(file) {
    char *ptr;
    size_t alloc = 512;
    size_t alloc_needed;
    char buffer[256];
    size_t stringlen = 0;
    string = malloc(alloc);
    if(!string)
      return PARAM_NO_MEM;

    while(fgets(buffer, sizeof(buffer), file)) {
      size_t buflen;
      ptr = strchr(buffer, '\r');
      if(ptr)
        *ptr = '\0';
      ptr = strchr(buffer, '\n');
      if(ptr)
        *ptr = '\0';
      buflen = strlen(buffer);
      alloc_needed = stringlen + buflen + 1;
      if(alloc < alloc_needed) {
#if SIZEOF_SIZE_T < 8
        if(alloc >= (size_t)SIZE_T_MAX/2) {
          Curl_safefree(string);
          return PARAM_NO_MEM;
        }
#endif
        /* doubling is enough since the string to add is always max 256 bytes
           and the alloc size start at 512 */
        alloc *= 2;
        ptr = realloc(string, alloc);
        if(!ptr) {
          Curl_safefree(string);
          return PARAM_NO_MEM;
        }
        string = ptr;
      }
      strcpy(string + stringlen, buffer);
      stringlen += buflen;
    }
  }
  *bufp = string;
  return PARAM_OK;
}

ParameterError file2memory(char **bufp, size_t *size, FILE *file)
{
  char *newbuf;
  char *buffer = NULL;
  size_t nused = 0;

  if(file) {
    size_t nread;
    size_t alloc = 512;
    do {
      if(!buffer || (alloc == nused)) {
        /* size_t overflow detection for huge files */
        if(alloc + 1 > ((size_t)-1)/2) {
          Curl_safefree(buffer);
          return PARAM_NO_MEM;
        }
        alloc *= 2;
        /* allocate an extra char, reserved space, for null termination */
        newbuf = realloc(buffer, alloc + 1);
        if(!newbuf) {
          Curl_safefree(buffer);
          return PARAM_NO_MEM;
        }
        buffer = newbuf;
      }
      nread = fread(buffer + nused, 1, alloc-nused, file);
      nused += nread;
    } while(nread);
    /* null terminate the buffer in case it's used as a string later */
    buffer[nused] = '\0';
    /* free trailing slack space, if possible */
    if(alloc != nused) {
      newbuf = realloc(buffer, nused + 1);
      if(!newbuf) {
        Curl_safefree(buffer);
        return PARAM_NO_MEM;
      }
      buffer = newbuf;
    }
    /* discard buffer if nothing was read */
    if(!nused) {
      Curl_safefree(buffer); /* no string */
    }
  }
  *size = nused;
  *bufp = buffer;
  return PARAM_OK;
}

void cleanarg(char *str)
{
#ifdef HAVE_WRITABLE_ARGV
  /* now that GetStr has copied the contents of nextarg, wipe the next
   * argument out so that the username:password isn't displayed in the
   * system process list */
  if(str) {
    size_t len = strlen(str);
    memset(str, ' ', len);
  }
#else
  (void)str;
#endif
}

/*
 * Parse the string and write the long in the given address. Return PARAM_OK
 * on success, otherwise a parameter specific error enum.
 *
 * Since this function gets called with the 'nextarg' pointer from within the
 * getparameter a lot, we must check it for NULL before accessing the str
 * data.
 */

ParameterError str2num(long *val, const char *str)
{
  if(str) {
    char *endptr;
    long num;
    errno = 0;
    num = strtol(str, &endptr, 10);
    if(errno == ERANGE)
      return PARAM_NUMBER_TOO_LARGE;
    if((endptr != str) && (endptr == str + strlen(str))) {
      *val = num;
      return PARAM_OK;  /* Ok */
    }
  }
  return PARAM_BAD_NUMERIC; /* badness */
}

/*
 * Parse the string and write the long in the given address. Return PARAM_OK
 * on success, otherwise a parameter error enum. ONLY ACCEPTS POSITIVE NUMBERS!
 *
 * Since this function gets called with the 'nextarg' pointer from within the
 * getparameter a lot, we must check it for NULL before accessing the str
 * data.
 */

ParameterError str2unum(long *val, const char *str)
{
  ParameterError result = str2num(val, str);
  if(result != PARAM_OK)
    return result;
  if(*val < 0)
    return PARAM_NEGATIVE_NUMERIC;

  return PARAM_OK;
}

/*
 * Parse the string and write the long in the given address if it is below the
 * maximum allowed value. Return PARAM_OK on success, otherwise a parameter
 * error enum. ONLY ACCEPTS POSITIVE NUMBERS!
 *
 * Since this function gets called with the 'nextarg' pointer from within the
 * getparameter a lot, we must check it for NULL before accessing the str
 * data.
 */

ParameterError str2unummax(long *val, const char *str, long max)
{
  ParameterError result = str2unum(val, str);
  if(result != PARAM_OK)
    return result;
  if(*val > max)
    return PARAM_NUMBER_TOO_LARGE;

  return PARAM_OK;
}


/*
 * Parse the string and write the double in the given address. Return PARAM_OK
 * on success, otherwise a parameter specific error enum.
 *
 * The 'max' argument is the maximum value allowed, as the numbers are often
 * multiplied when later used.
 *
 * Since this function gets called with the 'nextarg' pointer from within the
 * getparameter a lot, we must check it for NULL before accessing the str
 * data.
 */

static ParameterError str2double(double *val, const char *str, long max)
{
  if(str) {
    char *endptr;
    double num;
    errno = 0;
    num = strtod(str, &endptr);
    if(errno == ERANGE)
      return PARAM_NUMBER_TOO_LARGE;
    if(num > max) {
      /* too large */
      return PARAM_NUMBER_TOO_LARGE;
    }
    if((endptr != str) && (endptr == str + strlen(str))) {
      *val = num;
      return PARAM_OK;  /* Ok */
    }
  }
  return PARAM_BAD_NUMERIC; /* badness */
}

/*
 * Parse the string and write the double in the given address. Return PARAM_OK
 * on success, otherwise a parameter error enum. ONLY ACCEPTS POSITIVE NUMBERS!
 *
 * The 'max' argument is the maximum value allowed, as the numbers are often
 * multiplied when later used.
 *
 * Since this function gets called with the 'nextarg' pointer from within the
 * getparameter a lot, we must check it for NULL before accessing the str
 * data.
 */

ParameterError str2udouble(double *valp, const char *str, long max)
{
  double value;
  ParameterError result = str2double(&value, str, max);
  if(result != PARAM_OK)
    return result;
  if(value < 0)
    return PARAM_NEGATIVE_NUMERIC;

  *valp = value;
  return PARAM_OK;
}

/*
 * Parse the string and modify the long in the given address. Return
 * non-zero on failure, zero on success.
 *
 * The string is a list of protocols
 *
 * Since this function gets called with the 'nextarg' pointer from within the
 * getparameter a lot, we must check it for NULL before accessing the str
 * data.
 */

long proto2num(struct OperationConfig *config, long *val, const char *str)
{
  char *buffer;
  const char *sep = ",";
  char *token;

  static struct sprotos {
    const char *name;
    long bit;
  } const protos[] = {
    { "all", CURLPROTO_ALL },
    { "http", CURLPROTO_HTTP },
    { "https", CURLPROTO_HTTPS },
    { "ftp", CURLPROTO_FTP },
    { "ftps", CURLPROTO_FTPS },
    { "scp", CURLPROTO_SCP },
    { "sftp", CURLPROTO_SFTP },
    { "telnet", CURLPROTO_TELNET },
    { "ldap", CURLPROTO_LDAP },
    { "ldaps", CURLPROTO_LDAPS },
    { "dict", CURLPROTO_DICT },
    { "file", CURLPROTO_FILE },
    { "tftp", CURLPROTO_TFTP },
    { "imap", CURLPROTO_IMAP },
    { "imaps", CURLPROTO_IMAPS },
    { "pop3", CURLPROTO_POP3 },
    { "pop3s", CURLPROTO_POP3S },
    { "smtp", CURLPROTO_SMTP },
    { "smtps", CURLPROTO_SMTPS },
    { "rtsp", CURLPROTO_RTSP },
    { "gopher", CURLPROTO_GOPHER },
    { "smb", CURLPROTO_SMB },
    { "smbs", CURLPROTO_SMBS },
    { NULL, 0 }
  };

  if(!str)
    return 1;

  buffer = strdup(str); /* because strtok corrupts it */
  if(!buffer)
    return 1;

  /* Allow strtok() here since this isn't used threaded */
  /* !checksrc! disable BANNEDFUNC 2 */
  for(token = strtok(buffer, sep);
      token;
      token = strtok(NULL, sep)) {
    enum e_action { allow, deny, set } action = allow;

    struct sprotos const *pp;

    /* Process token modifiers */
    while(!ISALNUM(*token)) { /* may be NULL if token is all modifiers */
      switch (*token++) {
      case '=':
        action = set;
        break;
      case '-':
        action = deny;
        break;
      case '+':
        action = allow;
        break;
      default: /* Includes case of terminating NULL */
        Curl_safefree(buffer);
        return 1;
      }
    }

    for(pp = protos; pp->name; pp++) {
      if(curl_strequal(token, pp->name)) {
        switch(action) {
        case deny:
          *val &= ~(pp->bit);
          break;
        case allow:
          *val |= pp->bit;
          break;
        case set:
          *val = pp->bit;
          break;
        }
        break;
      }
    }

    if(!(pp->name)) { /* unknown protocol */
      /* If they have specified only this protocol, we say treat it as
         if no protocols are allowed */
      if(action == set)
        *val = 0;
      warnf(config->global, "unrecognized protocol '%s'\n", token);
    }
  }
  Curl_safefree(buffer);
  return 0;
}

/**
 * Check if the given string is a protocol supported by libcurl
 *
 * @param str  the protocol name
 * @return PARAM_OK  protocol supported
 * @return PARAM_LIBCURL_UNSUPPORTED_PROTOCOL  protocol not supported
 * @return PARAM_REQUIRES_PARAMETER   missing parameter
 */
int check_protocol(const char *str)
{
  const char * const *pp;
  const curl_version_info_data *curlinfo = curl_version_info(CURLVERSION_NOW);
  if(!str)
    return PARAM_REQUIRES_PARAMETER;
  for(pp = curlinfo->protocols; *pp; pp++) {
    if(curl_strequal(*pp, str))
      return PARAM_OK;
  }
  return PARAM_LIBCURL_UNSUPPORTED_PROTOCOL;
}

/**
 * Parses the given string looking for an offset (which may be a
 * larger-than-integer value). The offset CANNOT be negative!
 *
 * @param val  the offset to populate
 * @param str  the buffer containing the offset
 * @return PARAM_OK if successful, a parameter specific error enum if failure.
 */
ParameterError str2offset(curl_off_t *val, const char *str)
{
  char *endptr;
  if(str[0] == '-')
    /* offsets aren't negative, this indicates weird input */
    return PARAM_NEGATIVE_NUMERIC;

#if(SIZEOF_CURL_OFF_T > SIZEOF_LONG)
  {
    CURLofft offt = curlx_strtoofft(str, &endptr, 0, val);
    if(CURL_OFFT_FLOW == offt)
      return PARAM_NUMBER_TOO_LARGE;
    else if(CURL_OFFT_INVAL == offt)
      return PARAM_BAD_NUMERIC;
  }
#else
  errno = 0;
  *val = strtol(str, &endptr, 0);
  if((*val == LONG_MIN || *val == LONG_MAX) && errno == ERANGE)
    return PARAM_NUMBER_TOO_LARGE;
#endif
  if((endptr != str) && (endptr == str + strlen(str)))
    return PARAM_OK;

  return PARAM_BAD_NUMERIC;
}

static CURLcode checkpasswd(const char *kind, /* for what purpose */
                            const size_t i,   /* operation index */
                            const bool last,  /* TRUE if last operation */
                            char **userpwd)   /* pointer to allocated string */
{
  char *psep;
  char *osep;

  if(!*userpwd)
    return CURLE_OK;

  /* Attempt to find the password separator */
  psep = strchr(*userpwd, ':');

  /* Attempt to find the options separator */
  osep = strchr(*userpwd, ';');

  if(!psep && **userpwd != ';') {
    /* no password present, prompt for one */
    char passwd[256] = "";
    char prompt[256];
    size_t passwdlen;
    size_t userlen = strlen(*userpwd);
    char *passptr;

    if(osep)
      *osep = '\0';

    /* build a nice-looking prompt */
    if(!i && last)
      curlx_msnprintf(prompt, sizeof(prompt),
                      "Enter %s password for user '%s':",
                      kind, *userpwd);
    else
      curlx_msnprintf(prompt, sizeof(prompt),
                      "Enter %s password for user '%s' on URL #%zu:",
                      kind, *userpwd, i + 1);

    /* get password */
    getpass_r(prompt, passwd, sizeof(passwd));
    passwdlen = strlen(passwd);

    if(osep)
      *osep = ';';

    /* extend the allocated memory area to fit the password too */
    passptr = realloc(*userpwd,
                      passwdlen + 1 + /* an extra for the colon */
                      userlen + 1);   /* an extra for the zero */
    if(!passptr)
      return CURLE_OUT_OF_MEMORY;

    /* append the password separated with a colon */
    passptr[userlen] = ':';
    memcpy(&passptr[userlen + 1], passwd, passwdlen + 1);
    *userpwd = passptr;
  }

  return CURLE_OK;
}

ParameterError add2list(struct curl_slist **list, const char *ptr)
{
  struct curl_slist *newlist = curl_slist_append(*list, ptr);
  if(newlist)
    *list = newlist;
  else
    return PARAM_NO_MEM;

  return PARAM_OK;
}

int ftpfilemethod(struct OperationConfig *config, const char *str)
{
  if(curl_strequal("singlecwd", str))
    return CURLFTPMETHOD_SINGLECWD;
  if(curl_strequal("nocwd", str))
    return CURLFTPMETHOD_NOCWD;
  if(curl_strequal("multicwd", str))
    return CURLFTPMETHOD_MULTICWD;

  warnf(config->global, "unrecognized ftp file method '%s', using default\n",
        str);

  return CURLFTPMETHOD_MULTICWD;
}

int ftpcccmethod(struct OperationConfig *config, const char *str)
{
  if(curl_strequal("passive", str))
    return CURLFTPSSL_CCC_PASSIVE;
  if(curl_strequal("active", str))
    return CURLFTPSSL_CCC_ACTIVE;

  warnf(config->global, "unrecognized ftp CCC method '%s', using default\n",
        str);

  return CURLFTPSSL_CCC_PASSIVE;
}

long delegation(struct OperationConfig *config, char *str)
{
  if(curl_strequal("none", str))
    return CURLGSSAPI_DELEGATION_NONE;
  if(curl_strequal("policy", str))
    return CURLGSSAPI_DELEGATION_POLICY_FLAG;
  if(curl_strequal("always", str))
    return CURLGSSAPI_DELEGATION_FLAG;

  warnf(config->global, "unrecognized delegation method '%s', using none\n",
        str);

  return CURLGSSAPI_DELEGATION_NONE;
}

/*
 * my_useragent: returns allocated string with default user agent
 */
static char *my_useragent(void)
{
  return strdup(CURL_NAME "/" CURL_VERSION);
}

CURLcode get_args(struct OperationConfig *config, const size_t i)
{
  CURLcode result = CURLE_OK;
  bool last = (config->next ? FALSE : TRUE);

  /* Check we have a password for the given host user */
  if(config->userpwd && !config->oauth_bearer) {
    result = checkpasswd("host", i, last, &config->userpwd);
    if(result)
      return result;
  }

  /* Check we have a password for the given proxy user */
  if(config->proxyuserpwd) {
    result = checkpasswd("proxy", i, last, &config->proxyuserpwd);
    if(result)
      return result;
  }

  /* Check we have a user agent */
  if(!config->useragent) {
    config->useragent = my_useragent();
    if(!config->useragent) {
      helpf(config->global->errors, "out of memory\n");
      result = CURLE_OUT_OF_MEMORY;
    }
  }

  return result;
}

/*
 * Parse the string and modify ssl_version in the val argument. Return PARAM_OK
 * on success, otherwise a parameter error enum. ONLY ACCEPTS POSITIVE NUMBERS!
 *
 * Since this function gets called with the 'nextarg' pointer from within the
 * getparameter a lot, we must check it for NULL before accessing the str
 * data.
 */

ParameterError str2tls_max(long *val, const char *str)
{
   static struct s_tls_max {
    const char *tls_max_str;
    long tls_max;
  } const tls_max_array[] = {
    { "default", CURL_SSLVERSION_MAX_DEFAULT },
    { "1.0",     CURL_SSLVERSION_MAX_TLSv1_0 },
    { "1.1",     CURL_SSLVERSION_MAX_TLSv1_1 },
    { "1.2",     CURL_SSLVERSION_MAX_TLSv1_2 },
    { "1.3",     CURL_SSLVERSION_MAX_TLSv1_3 }
  };
  size_t i = 0;
  if(!str)
    return PARAM_REQUIRES_PARAMETER;
  for(i = 0; i < sizeof(tls_max_array)/sizeof(tls_max_array[0]); i++) {
    if(!strcmp(str, tls_max_array[i].tls_max_str)) {
      *val = tls_max_array[i].tls_max;
      return PARAM_OK;
    }
  }
  return PARAM_BAD_USE;
}