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mime-types.c: (just) (satisfy) scan-build
[s-mailx.git] / urlcrecry.c
blob04d760f1bca9250e9be52bff369cb80ed39a9648
1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
2 *@ URL parsing, credential handling and crypto hooks.
3 *@ .netrc parser quite loosely based upon NetBSD usr.bin/ftp/
4 *@ $NetBSD: ruserpass.c,v 1.33 2007/04/17 05:52:04 lukem Exp $
5 *
6 * Copyright (c) 2014 - 2017 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
7 *
8 * Permission to use, copy, modify, and/or distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20 #undef n_FILE
21 #define n_FILE urlcrecry
22
23 #ifndef HAVE_AMALGAMATION
24 # include "nail.h"
25 #endif
26
27 #ifdef HAVE_NETRC
28 /* NetBSD usr.bin/ftp/ruserpass.c uses 100 bytes for that, we need four
29 * concurrently (dummy, host, user, pass), so make it a KB */
30 # define NRC_TOKEN_MAXLEN (1024 / 4)
31
32 enum nrc_token {
33 NRC_ERROR = -1,
34 NRC_NONE = 0,
35 NRC_DEFAULT,
36 NRC_LOGIN,
37 NRC_PASSWORD,
38 NRC_ACCOUNT,
39 NRC_MACDEF,
40 NRC_MACHINE,
41 NRC_INPUT
42 };
43
44 struct nrc_node {
45 struct nrc_node *nrc_next;
46 struct nrc_node *nrc_result; /* In match phase, former possible one */
47 ui32_t nrc_mlen; /* Length of machine name */
48 ui32_t nrc_ulen; /* Length of user name */
49 ui32_t nrc_plen; /* Length of password */
50 char nrc_dat[n_VFIELD_SIZE(sizeof(ui32_t))];
51 };
52 # define NRC_NODE_ERR ((struct nrc_node*)-1)
53
54 static struct nrc_node *_nrc_list;
55 #endif /* HAVE_NETRC */
56
57 /* Find the last @ before a slash
58 * TODO Casts off the const but this is ok here; obsolete function! */
59 #ifdef HAVE_SOCKETS /* temporary (we'll have file://..) */
60 static char * _url_last_at_before_slash(char const *sp);
61 #endif
62
63 #ifdef HAVE_NETRC
64 /* Initialize .netrc cache */
65 static void _nrc_init(void);
66 static enum nrc_token __nrc_token(FILE *fi, char buffer[NRC_TOKEN_MAXLEN],
67 bool_t *nl_last);
68
69 /* We shall lookup a machine in .netrc says ok_blook(netrc_lookup).
70 * only_pass is true then the lookup is for the password only, otherwise we
71 * look for a user (and add password only if we have an exact machine match) */
72 static bool_t _nrc_lookup(struct url *urlp, bool_t only_pass);
73
74 /* 0=no match; 1=exact match; -1=wildcard match */
75 static int __nrc_host_match(struct nrc_node const *nrc,
76 struct url const *urlp);
77 static bool_t __nrc_find_user(struct url *urlp,
78 struct nrc_node const *nrc);
79 static bool_t __nrc_find_pass(struct url *urlp, bool_t user_match,
80 struct nrc_node const *nrc);
81 #endif /* HAVE_NETRC */
82
83 /* The password can also be gained through external agents TODO v15-compat */
84 #ifdef HAVE_AGENT
85 static bool_t _agent_shell_lookup(struct url *urlp, char const *comm);
86 #endif
87
88 #ifdef HAVE_SOCKETS
89 static char *
90 _url_last_at_before_slash(char const *sp)
91 {
92 char const *cp;
93 char c;
94 NYD2_ENTER;
95
96 for (cp = sp; (c = *cp) != '\0'; ++cp)
97 if (c == '/')
98 break;
99 while (cp > sp && *--cp != '@')
100 ;
101 if (*cp != '@')
102 cp = NULL;
103 NYD2_LEAVE;
104 return n_UNCONST(cp);
105 }
106 #endif
107
108 #ifdef HAVE_NETRC
109 static void
110 _nrc_init(void)
111 {
112 char buffer[NRC_TOKEN_MAXLEN], host[NRC_TOKEN_MAXLEN],
113 user[NRC_TOKEN_MAXLEN], pass[NRC_TOKEN_MAXLEN], *netrc_load;
114 struct stat sb;
115 FILE * volatile fi;
116 enum nrc_token t;
117 bool_t volatile ispipe;
118 bool_t seen_default, nl_last;
119 struct nrc_node * volatile ntail, * volatile nhead, * volatile nrc;
120 NYD_ENTER;
121
122 n_UNINIT(ntail, NULL);
123 nhead = NULL;
124 nrc = NRC_NODE_ERR;
125 ispipe = FAL0;
126 fi = NULL;
127
128 hold_all_sigs(); /* todo */
129
130 if ((netrc_load = ok_vlook(netrc_pipe)) != NULL) {
131 ispipe = TRU1;
132 if ((fi = Popen(netrc_load, "r", ok_vlook(SHELL), NULL, n_CHILD_FD_NULL)
133 ) == NULL) {
134 n_perr(netrc_load, 0);
135 goto j_leave;
136 }
137 } else {
138 if ((netrc_load = fexpand(ok_vlook(NETRC), FEXP_LOCAL | FEXP_NOPROTO)
139 ) == NULL)
140 goto j_leave;
141
142 if ((fi = Fopen(netrc_load, "r")) == NULL) {
143 n_err(_("Cannot open %s\n"), n_shexp_quote_cp(netrc_load, FAL0));
144 goto j_leave;
145 }
146
147 /* Be simple and apply rigid (permission) check(s) */
148 if (fstat(fileno(fi), &sb) == -1 || !S_ISREG(sb.st_mode) ||
149 (sb.st_mode & (S_IRWXG | S_IRWXO))) {
150 n_err(_("Not a regular file, or accessible by non-user: %s\n"),
151 n_shexp_quote_cp(netrc_load, FAL0));
152 goto jleave;
153 }
154 }
155
156 seen_default = FAL0;
157 nl_last = TRU1;
158 jnext:
159 switch((t = __nrc_token(fi, buffer, &nl_last))) {
160 case NRC_NONE:
161 break;
162 default: /* Doesn't happen (but on error?), keep CC happy */
163 case NRC_DEFAULT:
164 jdef:
165 /* We ignore the default entry (require an exact host match), and we also
166 * ignore anything after such an entry (faulty syntax) */
167 seen_default = TRU1;
168 /* FALLTHRU */
169 case NRC_MACHINE:
170 jm_h:
171 /* Normalize HOST to lowercase */
172 *host = '\0';
173 if (!seen_default && (t = __nrc_token(fi, host, &nl_last)) != NRC_INPUT)
174 goto jerr;
175 else {
176 char *cp;
177 for (cp = host; *cp != '\0'; ++cp)
178 *cp = lowerconv(*cp);
179 }
180
181 *user = *pass = '\0';
182 while ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_NONE &&
183 t != NRC_MACHINE && t != NRC_DEFAULT) {
184 switch(t) {
185 case NRC_LOGIN:
186 if ((t = __nrc_token(fi, user, &nl_last)) != NRC_INPUT)
187 goto jerr;
188 break;
189 case NRC_PASSWORD:
190 if ((t = __nrc_token(fi, pass, &nl_last)) != NRC_INPUT)
191 goto jerr;
192 break;
193 case NRC_ACCOUNT:
194 if ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_INPUT)
195 goto jerr;
196 break;
197 case NRC_MACDEF:
198 if ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_INPUT)
199 goto jerr;
200 else {
201 int i = 0, c;
202 while ((c = getc(fi)) != EOF)
203 if (c == '\n') { /* xxx */
204 /* Don't care about comments here, since we parse until
205 * we've seen two successive newline characters */
206 if (i)
207 break;
208 i = 1;
209 } else
210 i = 0;
211 }
212 break;
213 default:
214 case NRC_ERROR:
215 goto jerr;
216 }
217 }
218
219 if (!seen_default && (*user != '\0' || *pass != '\0')) {
220 size_t hl = strlen(host), ul = strlen(user), pl = strlen(pass);
221 struct nrc_node *nx = smalloc(n_VSTRUCT_SIZEOF(struct nrc_node,
222 nrc_dat) + hl +1 + ul +1 + pl +1);
223
224 if (nhead != NULL)
225 ntail->nrc_next = nx;
226 else
227 nhead = nx;
228 ntail = nx;
229 nx->nrc_next = NULL;
230 nx->nrc_mlen = hl;
231 nx->nrc_ulen = ul;
232 nx->nrc_plen = pl;
233 memcpy(nx->nrc_dat, host, ++hl);
234 memcpy(nx->nrc_dat + hl, user, ++ul);
235 memcpy(nx->nrc_dat + hl + ul, pass, ++pl);
236 }
237 if (t == NRC_MACHINE)
238 goto jm_h;
239 if (t == NRC_DEFAULT)
240 goto jdef;
241 if (t != NRC_NONE)
242 goto jnext;
243 break;
244 case NRC_ERROR:
245 jerr:
246 if(n_poption & n_PO_D_V)
247 n_err(_("Errors occurred while parsing %s\n"),
248 n_shexp_quote_cp(netrc_load, FAL0));
249 assert(nrc == NRC_NODE_ERR);
250 goto jleave;
251 }
252
253 if (nhead != NULL)
254 nrc = nhead;
255 jleave:
256 if (fi != NULL) {
257 if (ispipe)
258 Pclose(fi, TRU1);
259 else
260 Fclose(fi);
261 }
262 if (nrc == NRC_NODE_ERR)
263 while (nhead != NULL) {
264 ntail = nhead;
265 nhead = nhead->nrc_next;
266 free(ntail);
267 }
268 j_leave:
269 _nrc_list = nrc;
270 rele_all_sigs();
271 NYD_LEAVE;
272 }
273
274 static enum nrc_token
275 __nrc_token(FILE *fi, char buffer[NRC_TOKEN_MAXLEN], bool_t *nl_last)
276 {
277 int c;
278 char *cp;
279 enum nrc_token rv;
280 NYD2_ENTER;
281
282 rv = NRC_NONE;
283 for (;;) {
284 bool_t seen_nl;
285
286 c = EOF;
287 if (feof(fi) || ferror(fi))
288 goto jleave;
289
290 for (seen_nl = *nl_last; (c = getc(fi)) != EOF && whitechar(c);)
291 seen_nl |= (c == '\n');
292
293 if (c == EOF)
294 goto jleave;
295 /* fetchmail and derived parsers support comments */
296 if ((*nl_last = seen_nl) && c == '#') {
297 while ((c = getc(fi)) != EOF && c != '\n')
298 ;
299 continue;
300 }
301 break;
302 }
303
304 cp = buffer;
305 /* Is it a quoted token? At least IBM syntax also supports ' quotes */
306 if (c == '"' || c == '\'') {
307 int quotec = c;
308
309 /* Not requiring the closing QM is (Net)BSD syntax */
310 while ((c = getc(fi)) != EOF && c != quotec) {
311 /* Reverse solidus escaping the next character is (Net)BSD syntax */
312 if (c == '\\')
313 if ((c = getc(fi)) == EOF)
314 break;
315 *cp++ = c;
316 if (PTRCMP(cp, ==, buffer + NRC_TOKEN_MAXLEN)) {
317 rv = NRC_ERROR;
318 goto jleave;
319 }
320 }
321 } else {
322 *cp++ = c;
323 while ((c = getc(fi)) != EOF && !whitechar(c)) {
324 /* Rverse solidus escaping the next character is (Net)BSD syntax */
325 if (c == '\\' && (c = getc(fi)) == EOF)
326 break;
327 *cp++ = c;
328 if (PTRCMP(cp, ==, buffer + NRC_TOKEN_MAXLEN)) {
329 rv = NRC_ERROR;
330 goto jleave;
331 }
332 }
333 *nl_last = (c == '\n');
334 }
335 *cp = '\0';
336
337 if (*buffer == '\0')
338 do {/*rv = NRC_NONE*/} while (0);
339 else if (!strcmp(buffer, "default"))
340 rv = NRC_DEFAULT;
341 else if (!strcmp(buffer, "login"))
342 rv = NRC_LOGIN;
343 else if (!strcmp(buffer, "password") || !strcmp(buffer, "passwd"))
344 rv = NRC_PASSWORD;
345 else if (!strcmp(buffer, "account"))
346 rv = NRC_ACCOUNT;
347 else if (!strcmp(buffer, "macdef"))
348 rv = NRC_MACDEF;
349 else if (!strcmp(buffer, "machine"))
350 rv = NRC_MACHINE;
351 else
352 rv = NRC_INPUT;
353 jleave:
354 if (c == EOF && !feof(fi))
355 rv = NRC_ERROR;
356 NYD2_LEAVE;
357 return rv;
358 }
359
360 static bool_t
361 _nrc_lookup(struct url *urlp, bool_t only_pass)
362 {
363 struct nrc_node *nrc, *nrc_wild, *nrc_exact;
364 bool_t rv = FAL0;
365 NYD_ENTER;
366
367 assert(!only_pass || urlp->url_user.s != NULL);
368 assert(only_pass || urlp->url_user.s == NULL);
369
370 if (_nrc_list == NULL)
371 _nrc_init();
372 if (_nrc_list == NRC_NODE_ERR)
373 goto jleave;
374
375 nrc_wild = nrc_exact = NULL;
376 for (nrc = _nrc_list; nrc != NULL; nrc = nrc->nrc_next)
377 switch (__nrc_host_match(nrc, urlp)) {
378 case 1:
379 nrc->nrc_result = nrc_exact;
380 nrc_exact = nrc;
381 continue;
382 case -1:
383 nrc->nrc_result = nrc_wild;
384 nrc_wild = nrc;
385 /* FALLTHRU */
386 case 0:
387 continue;
388 }
389
390 if (!only_pass && urlp->url_user.s == NULL) {
391 /* Must be an unambiguous entry of its kind */
392 if (nrc_exact != NULL && nrc_exact->nrc_result != NULL)
393 goto jleave;
394 if (__nrc_find_user(urlp, nrc_exact))
395 goto j_user;
396
397 if (nrc_wild != NULL && nrc_wild->nrc_result != NULL)
398 goto jleave;
399 if (!__nrc_find_user(urlp, nrc_wild))
400 goto jleave;
401 j_user:
402 ;
403 }
404
405 if (__nrc_find_pass(urlp, TRU1, nrc_exact) ||
406 __nrc_find_pass(urlp, TRU1, nrc_wild) ||
407 /* Do not try to find a password without exact user match unless we've
408 * been called during credential lookup, a.k.a. the second time */
409 !only_pass ||
410 __nrc_find_pass(urlp, FAL0, nrc_exact) ||
411 __nrc_find_pass(urlp, FAL0, nrc_wild))
412 rv = TRU1;
413 jleave:
414 NYD_LEAVE;
415 return rv;
416 }
417
418 static int
419 __nrc_host_match(struct nrc_node const *nrc, struct url const *urlp)
420 {
421 char const *d2, *d1;
422 size_t l2, l1;
423 int rv = 0;
424 NYD2_ENTER;
425
426 /* Find a matching machine -- entries are all lowercase normalized */
427 if (nrc->nrc_mlen == urlp->url_host.l) {
428 if (n_LIKELY(!memcmp(nrc->nrc_dat, urlp->url_host.s, urlp->url_host.l)))
429 rv = 1;
430 goto jleave;
431 }
432
433 /* Cannot be an exact match, but maybe the .netrc machine starts with
434 * a "*." glob, which we recognize as an extension, meaning "skip
435 * a single subdomain, then match the rest" */
436 d1 = nrc->nrc_dat + 2;
437 l1 = nrc->nrc_mlen;
438 if (l1 <= 2 || d1[-1] != '.' || d1[-2] != '*')
439 goto jleave;
440 l1 -= 2;
441
442 /* Brute skipping over one subdomain, no RFC 1035 or RFC 1122 checks;
443 * in fact this even succeeds for ".host.com", but - why care, here? */
444 d2 = urlp->url_host.s;
445 l2 = urlp->url_host.l;
446 while (l2 > 0) {
447 --l2;
448 if (*d2++ == '.')
449 break;
450 }
451
452 if (l2 == l1 && !memcmp(d1, d2, l1))
453 /* This matches, but we won't use it directly but watch out for an
454 * exact match first! */
455 rv = -1;
456 jleave:
457 NYD2_LEAVE;
458 return rv;
459 }
460
461 static bool_t
462 __nrc_find_user(struct url *urlp, struct nrc_node const *nrc)
463 {
464 NYD2_ENTER;
465
466 for (; nrc != NULL; nrc = nrc->nrc_result)
467 if (nrc->nrc_ulen > 0) {
468 /* Fake it was part of URL otherwise XXX */
469 urlp->url_flags |= n_URL_HAD_USER;
470 /* That buffer will be duplicated by url_parse() in this case! */
471 urlp->url_user.s = n_UNCONST(nrc->nrc_dat + nrc->nrc_mlen +1);
472 urlp->url_user.l = nrc->nrc_ulen;
473 break;
474 }
475
476 NYD2_LEAVE;
477 return (nrc != NULL);
478 }
479
480 static bool_t
481 __nrc_find_pass(struct url *urlp, bool_t user_match, struct nrc_node const *nrc)
482 {
483 NYD2_ENTER;
484
485 for (; nrc != NULL; nrc = nrc->nrc_result) {
486 bool_t um = (nrc->nrc_ulen == urlp->url_user.l &&
487 !memcmp(nrc->nrc_dat + nrc->nrc_mlen +1, urlp->url_user.s,
488 urlp->url_user.l));
489
490 if (user_match) {
491 if (!um)
492 continue;
493 } else if (!um && nrc->nrc_ulen > 0)
494 continue;
495 if (nrc->nrc_plen == 0)
496 continue;
497
498 /* We are responsible for duplicating this buffer! */
499 urlp->url_pass.s = savestrbuf(nrc->nrc_dat + nrc->nrc_mlen +1 +
500 nrc->nrc_ulen + 1, (urlp->url_pass.l = nrc->nrc_plen));
501 break;
502 }
503
504 NYD2_LEAVE;
505 return (nrc != NULL);
506 }
507 #endif /* HAVE_NETRC */
508
509 #ifdef HAVE_AGENT
510 static bool_t
511 _agent_shell_lookup(struct url *urlp, char const *comm) /* TODO v15-compat */
512 {
513 char buf[128];
514 char const *env_addon[8];
515 struct str s;
516 FILE *pbuf;
517 union {int c; sighandler_type sht;} u;
518 size_t cl, l;
519 bool_t rv = FAL0;
520 NYD2_ENTER;
521
522 env_addon[0] = str_concat_csvl(&s, "NAIL_USER", "=", urlp->url_user.s,
523 NULL)->s;
524 env_addon[1] = str_concat_csvl(&s,
525 "NAIL_USER_ENC", "=", urlp->url_user_enc.s, NULL)->s;
526 env_addon[2] = str_concat_csvl(&s, "NAIL_HOST", "=", urlp->url_host.s,
527 NULL)->s;
528 env_addon[3] = str_concat_csvl(&s, "NAIL_HOST_PORT", "=", urlp->url_h_p.s,
529 NULL)->s;
530 env_addon[4] = NULL;
531
532 if ((pbuf = Popen(comm, "r", ok_vlook(SHELL), env_addon, -1)) == NULL) {
533 n_err(_("*agent-shell-lookup* startup failed (%s)\n"), comm);
534 goto jleave;
535 }
536
537 for (s.s = NULL, s.l = cl = l = 0; (u.c = getc(pbuf)) != EOF; ++cl) {
538 if (u.c == '\n') /* xxx */
539 continue;
540 buf[l++] = u.c;
541 if (l == sizeof(buf) - 1) {
542 n_str_add_buf(&s, buf, l);
543 l = 0;
544 }
545 }
546 if (l > 0)
547 n_str_add_buf(&s, buf, l);
548
549 if (!Pclose(pbuf, TRU1)) {
550 n_err(_("*agent-shell-lookup* execution failure (%s)\n"), comm);
551 goto jleave;
552 }
553
554 /* We are responsible for duplicating this buffer! */
555 if (s.s != NULL)
556 urlp->url_pass.s = savestrbuf(s.s, urlp->url_pass.l = s.l);
557 else if (cl > 0)
558 urlp->url_pass.s = n_UNCONST(n_empty), urlp->url_pass.l = 0;
559 rv = TRU1;
560 jleave:
561 if (s.s != NULL)
562 free(s.s);
563 NYD2_LEAVE;
564 return rv;
565 }
566 #endif /* HAVE_AGENT */
567
568 FL char *
569 (urlxenc)(char const *cp, bool_t ispath n_MEMORY_DEBUG_ARGS)
570 {
571 char *n, *np, c1;
572 NYD2_ENTER;
573
574 /* C99 */{
575 size_t i;
576
577 i = strlen(cp);
578 if(i >= UIZ_MAX / 3){
579 n = NULL;
580 goto jleave;
581 }
582 i *= 3;
583 ++i;
584 np = n = (n_autorec_alloc_from_pool)(NULL, i n_MEMORY_DEBUG_ARGSCALL);
585 }
586
587 for (; (c1 = *cp) != '\0'; ++cp) {
588 /* (RFC 1738) RFC 3986, 2.3 Unreserved Characters:
589 * ALPHA / DIGIT / "-" / "." / "_" / "~"
590 * However add a special is[file]path mode for file-system friendliness */
591 if (alnumchar(c1) || c1 == '_')
592 *np++ = c1;
593 else if (!ispath) {
594 if (c1 != '-' && c1 != '.' && c1 != '~')
595 goto jesc;
596 *np++ = c1;
597 } else if (PTRCMP(np, >, n) && (*cp == '-' || *cp == '.')) /* XXX imap */
598 *np++ = c1;
599 else {
600 jesc:
601 np[0] = '%';
602 n_c_to_hex_base16(np + 1, c1);
603 np += 3;
604 }
605 }
606 *np = '\0';
607 jleave:
608 NYD2_LEAVE;
609 return n;
610 }
611
612 FL char *
613 (urlxdec)(char const *cp n_MEMORY_DEBUG_ARGS)
614 {
615 char *n, *np;
616 si32_t c;
617 NYD2_ENTER;
618
619 np = n = (n_autorec_alloc_from_pool)(NULL, strlen(cp) +1
620 n_MEMORY_DEBUG_ARGSCALL);
621
622 while ((c = (uc_i)*cp++) != '\0') {
623 if (c == '%' && cp[0] != '\0' && cp[1] != '\0') {
624 si32_t o = c;
625 if (n_LIKELY((c = n_c_from_hex_base16(cp)) >= '\0'))
626 cp += 2;
627 else
628 c = o;
629 }
630 *np++ = (char)c;
631 }
632 *np = '\0';
633 NYD2_LEAVE;
634 return n;
635 }
636
637 FL int
638 c_urlcodec(void *vp){
639 bool_t ispath;
640 size_t alen;
641 char const **argv, *varname, *varres, *act, *cp;
642 NYD_ENTER;
643
644 argv = vp;
645 varname = (n_pstate & n_PS_ARGMOD_VPUT) ? *argv++ : NULL;
646
647 act = *argv;
648 for(cp = act; *cp != '\0' && !blankspacechar(*cp); ++cp)
649 ;
650 if((ispath = (*act == 'p'))){
651 if(!ascncasecmp(++act, "ath", 3))
652 act += 3;
653 }
654 if(act >= cp)
655 goto jesynopsis;
656 alen = PTR2SIZE(cp - act);
657 if(*cp != '\0')
658 ++cp;
659
660 n_pstate_err_no = n_ERR_NONE;
661
662 if(is_ascncaseprefix(act, "encode", alen))
663 varres = urlxenc(cp, ispath);
664 else if(is_ascncaseprefix(act, "decode", alen))
665 varres = urlxdec(cp);
666 else
667 goto jesynopsis;
668
669 if(varres == NULL){
670 n_pstate_err_no = n_ERR_CANCELED;
671 varres = cp;
672 vp = NULL;
673 }
674
675 if(varname != NULL){
676 if(!n_var_vset(varname, (uintptr_t)varres)){
677 n_pstate_err_no = n_ERR_NOTSUP;
678 cp = NULL;
679 }
680 }else{
681 struct str in, out;
682
683 in.l = strlen(in.s = n_UNCONST(varres));
684 makeprint(&in, &out);
685 if(fprintf(n_stdout, "%s\n", out.s) < 0){
686 n_pstate_err_no = n_err_no;
687 vp = NULL;
688 }
689 free(out.s);
690 }
691
692 jleave:
693 NYD_LEAVE;
694 return (vp != NULL ? 0 : 1);
695 jesynopsis:
696 n_err(_("Synopsis: urlcodec: "
697 "<[path]e[ncode]|[path]d[ecode]> <rest-of-line>\n"));
698 n_pstate_err_no = n_ERR_INVAL;
699 vp = NULL;
700 goto jleave;
701 }
702
703 FL int
704 c_urlencode(void *v) /* XXX IDNA?? */
705 {
706 char **ap;
707 NYD_ENTER;
708
709 n_OBSOLETE("`urlencode': please use `urlcodec enc[ode]' instead");
710
711 for (ap = v; *ap != NULL; ++ap) {
712 char *in = *ap, *out = urlxenc(in, FAL0);
713
714 if(out == NULL)
715 out = n_UNCONST(V_(n_error));
716 fprintf(n_stdout,
717 " in: <%s> (%" PRIuZ " bytes)\nout: <%s> (%" PRIuZ " bytes)\n",
718 in, strlen(in), out, strlen(out));
719 }
720 NYD_LEAVE;
721 return 0;
722 }
723
724 FL int
725 c_urldecode(void *v) /* XXX IDNA?? */
726 {
727 char **ap;
728 NYD_ENTER;
729
730 n_OBSOLETE("`urldecode': please use `urlcodec dec[ode]' instead");
731
732 for (ap = v; *ap != NULL; ++ap) {
733 char *in = *ap, *out = urlxdec(in);
734
735 if(out == NULL)
736 out = n_UNCONST(V_(n_error));
737 fprintf(n_stdout,
738 " in: <%s> (%" PRIuZ " bytes)\nout: <%s> (%" PRIuZ " bytes)\n",
739 in, strlen(in), out, strlen(out));
740 }
741 NYD_LEAVE;
742 return 0;
743 }
744
745 FL char *
746 url_mailto_to_address(char const *mailtop){ /* TODO hack! RFC 6068; factory? */
747 size_t i;
748 char *rv;
749 char const *mailtop_orig;
750 NYD_ENTER;
751
752 if(!is_prefix("mailto:", mailtop_orig = mailtop)){
753 rv = NULL;
754 goto jleave;
755 }
756 mailtop += sizeof("mailto:") -1;
757
758 /* TODO This is all intermediate, and for now just enough to understand
759 * TODO a little bit of a little more advanced List-Post: headers. */
760 /* Strip any hfield additions, keep only to addr-spec's */
761 if((rv = strchr(mailtop, '?')) != NULL)
762 rv = savestrbuf(mailtop, i = PTR2SIZE(rv - mailtop));
763 else
764 rv = savestrbuf(mailtop, i = strlen(mailtop));
765
766 i = strlen(rv);
767
768 /* Simply perform percent-decoding if there is a percent % */
769 if(memchr(rv, '%', i) != NULL){
770 char *rv_base;
771 bool_t err;
772
773 for(err = FAL0, mailtop = rv_base = rv; i > 0;){
774 char c;
775
776 if((c = *mailtop++) == '%'){
777 si32_t cc;
778
779 if(i < 3 || (cc = n_c_from_hex_base16(mailtop)) < 0){
780 if(!err && (err = TRU1, n_poption & n_PO_D_V))
781 n_err(_("Invalid RFC 6068 'mailto' URL: %s\n"),
782 n_shexp_quote_cp(mailtop_orig, FAL0));
783 goto jhex_putc;
784 }
785 *rv++ = (char)cc;
786 mailtop += 2;
787 i -= 3;
788 }else{
789 jhex_putc:
790 *rv++ = c;
791 --i;
792 }
793 }
794 *rv = '\0';
795 rv = rv_base;
796 }
797 jleave:
798 NYD_LEAVE;
799 return rv;
800 }
801
802 FL char const *
803 n_servbyname(char const *proto, ui16_t *irv_or_null){
804 static struct{
805 char const name[14];
806 char const port[8];
807 ui16_t portno;
808 } const tbl[] = {
809 { "smtp", "25", 25},
810 { "submission", "587", 587},
811 { "smtps", "465", 465},
812 { "pop3", "110", 110},
813 { "pop3s", "995", 995},
814 { "imap", "143", 143},
815 { "imaps", "993", 993},
816 { "file", "", 0}
817 };
818 char const *rv;
819 size_t l, i;
820 NYD2_ENTER;
821
822 for(rv = proto; *rv != '\0'; ++rv)
823 if(*rv == ':')
824 break;
825 l = PTR2SIZE(rv - proto);
826
827 for(rv = NULL, i = 0; i < n_NELEM(tbl); ++i)
828 if(!ascncasecmp(tbl[i].name, proto, l)){
829 rv = tbl[i].port;
830 if(irv_or_null != NULL)
831 *irv_or_null = tbl[i].portno;
832 break;
833 }
834 NYD2_LEAVE;
835 return rv;
836 }
837
838 #ifdef HAVE_SOCKETS /* Note: not indented for that -- later: file:// etc.! */
839 FL bool_t
840 url_parse(struct url *urlp, enum cproto cproto, char const *data)
841 {
842 #if defined HAVE_SMTP && defined HAVE_POP3 && defined HAVE_IMAP
843 # define a_ALLPROTO
844 #endif
845 #if defined HAVE_SMTP || defined HAVE_POP3 || defined HAVE_IMAP
846 # define a_ANYPROTO
847 char *cp, *x;
848 #endif
849 bool_t rv = FAL0;
850 NYD_ENTER;
851 n_UNUSED(data);
852
853 memset(urlp, 0, sizeof *urlp);
854 urlp->url_input = data;
855 urlp->url_cproto = cproto;
856
857 /* Network protocol */
858 #define a_PROTOX(X,Y,Z) \
859 urlp->url_portno = Y;\
860 memcpy(urlp->url_proto, X "://", sizeof(X "://"));\
861 urlp->url_proto[sizeof(X) -1] = '\0';\
862 urlp->url_proto_len = sizeof(X) -1;\
863 urlp->url_proto_xlen = sizeof(X "://") -1;\
864 do{ Z; }while(0)
865 #define a__IF(X,Y,Z) \
866 if(!ascncasecmp(data, X "://", sizeof(X "://") -1)){\
867 a_PROTOX(X, Y, Z);\
868 data += sizeof(X "://") -1;\
869 goto juser;\
870 }
871 #define a_IF(X,Y) a__IF(X, Y, (void)0)
872 #ifdef HAVE_SSL
873 # define a_IFS(X,Y) a__IF(X, Y, urlp->url_flags |= n_URL_TLS_REQUIRED)
874 # define a_IFs(X,Y) a__IF(X, Y, urlp->url_flags |= n_URL_TLS_OPTIONAL)
875 #else
876 # define a_IFS(X,Y) goto jeproto;
877 # define a_IFs(X,Y) a_IF(X, Y)
878 #endif
879
880 switch(cproto){
881 case CPROTO_CCRED:
882 /* The special S/MIME etc. credential lookup */
883 #ifdef HAVE_SSL
884 a_PROTOX("ccred", 0, (void)0);
885 break;
886 #else
887 goto jeproto;
888 #endif
889 case CPROTO_SMTP:
890 #ifdef HAVE_SMTP
891 a_IFS("smtps", 465)
892 a_IFs("smtp", 25)
893 a_IFs("submission", 587)
894 a_PROTOX("smtp", 25, urlp->url_flags |= n_URL_TLS_OPTIONAL);
895 break;
896 #else
897 goto jeproto;
898 #endif
899 case CPROTO_POP3:
900 #ifdef HAVE_POP3
901 a_IFS("pop3s", 995)
902 a_IFs("pop3", 110)
903 a_PROTOX("pop3", 110, urlp->url_flags |= n_URL_TLS_OPTIONAL);
904 break;
905 #else
906 goto jeproto;
907 #endif
908 #ifdef HAVE_IMAP
909 case CPROTO_IMAP:
910 a_IFS("imaps", 993)
911 a_IFs("imap", 143)
912 a_PROTOX("imap", 143, urlp->url_flags |= n_URL_TLS_OPTIONAL);
913 break;
914 #else
915 goto jeproto;
916 #endif
917 }
918
919 #undef a_PROTOX
920 #undef a__IF
921 #undef a_IF
922 #undef a_IFS
923 #undef a_IFs
924
925 if (strstr(data, "://") != NULL) {
926 #if !defined a_ALLPROTO || !defined HAVE_SSL
927 jeproto:
928 #endif
929 n_err(_("URL proto:// prefix invalid: %s\n"), urlp->url_input);
930 goto jleave;
931 }
932 #ifdef a_ANYPROTO
933
934 /* User and password, I */
935 juser:
936 if ((cp = _url_last_at_before_slash(data)) != NULL) {
937 size_t l;
938 char const *urlpe, *d;
939 char *ub;
940
941 l = PTR2SIZE(cp - data);
942 ub = ac_alloc(l +1);
943 d = data;
944 urlp->url_flags |= n_URL_HAD_USER;
945 data = &cp[1];
946
947 /* And also have a password? */
948 if((cp = memchr(d, ':', l)) != NULL){
949 size_t i = PTR2SIZE(cp - d);
950
951 l -= i + 1;
952 memcpy(ub, cp + 1, l);
953 ub[l] = '\0';
954
955 if((urlp->url_pass.s = urlxdec(ub)) == NULL)
956 goto jurlp_err;
957 urlp->url_pass.l = strlen(urlp->url_pass.s);
958 if((urlpe = urlxenc(urlp->url_pass.s, FAL0)) == NULL)
959 goto jurlp_err;
960 if(strcmp(ub, urlpe))
961 goto jurlp_err;
962 l = i;
963 }
964
965 memcpy(ub, d, l);
966 ub[l] = '\0';
967 if((urlp->url_user.s = urlxdec(ub)) == NULL)
968 goto jurlp_err;
969 urlp->url_user.l = strlen(urlp->url_user.s);
970 if((urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0)) == NULL)
971 goto jurlp_err;
972 urlp->url_user_enc.l = strlen(urlp->url_user_enc.s);
973
974 if(urlp->url_user_enc.l != l || memcmp(urlp->url_user_enc.s, ub, l)){
975 jurlp_err:
976 n_err(_("String is not properly URL percent encoded: %s\n"), ub);
977 d = NULL;
978 }
979
980 ac_free(ub);
981 if(d == NULL)
982 goto jleave;
983 }
984
985 /* Servername and port -- and possible path suffix */
986 if ((cp = strchr(data, ':')) != NULL) { /* TODO URL parse, use IPAddress! */
987 urlp->url_port = x = savestr(x = &cp[1]);
988 if ((x = strchr(x, '/')) != NULL) {
989 *x = '\0';
990 while(*++x == '/')
991 ;
992 }
993
994 if((n_idec_ui16_cp(&urlp->url_portno, urlp->url_port, 10, NULL
995 ) & (n_IDEC_STATE_EMASK | n_IDEC_STATE_CONSUMED)
996 ) != n_IDEC_STATE_CONSUMED){
997 n_err(_("URL with invalid port number: %s\n"), urlp->url_input);
998 goto jleave;
999 }
1000 } else {
1001 if ((x = strchr(data, '/')) != NULL) {
1002 data = savestrbuf(data, PTR2SIZE(x - data));
1003 while(*++x == '/')
1004 ;
1005 }
1006 cp = n_UNCONST(data + strlen(data));
1007 }
1008
1009 /* A (non-empty) path may only occur with IMAP */
1010 if (x != NULL && *x != '\0') {
1011 /* Take care not to count adjacent solidus for real, on either end */
1012 char *x2;
1013 size_t i;
1014 bool_t trailsol;
1015
1016 for(trailsol = FAL0, x2 = savestrbuf(x, i = strlen(x)); i > 0;
1017 trailsol = TRU1, --i)
1018 if(x2[i - 1] != '/')
1019 break;
1020 x2[i] = '\0';
1021
1022 if (i > 0) {
1023 if (cproto != CPROTO_IMAP) {
1024 n_err(_("URL protocol doesn't support paths: \"%s\"\n"),
1025 urlp->url_input);
1026 goto jleave;
1027 }
1028 #ifdef HAVE_IMAP
1029 if(trailsol){
1030 urlp->url_path.s = n_autorec_alloc(i + sizeof("/INBOX"));
1031 memcpy(urlp->url_path.s, x, i);
1032 memcpy(&urlp->url_path.s, "/INBOX", sizeof("/INBOX"));
1033 urlp->url_path.l = (i += sizeof("/INBOX") -1);
1034 }else
1035 #endif
1036 urlp->url_path.l = i, urlp->url_path.s = x2;
1037 }
1038 }
1039 #ifdef HAVE_IMAP
1040 if(cproto == CPROTO_IMAP && urlp->url_path.s == NULL)
1041 urlp->url_path.s = savestrbuf("INBOX",
1042 urlp->url_path.l = sizeof("INBOX") -1);
1043 #endif
1044
1045 urlp->url_host.s = savestrbuf(data, urlp->url_host.l = PTR2SIZE(cp - data));
1046 { size_t i;
1047 for (cp = urlp->url_host.s, i = urlp->url_host.l; i != 0; ++cp, --i)
1048 *cp = lowerconv(*cp);
1049 }
1050
1051 /* .url_h_p: HOST:PORT */
1052 { size_t i;
1053 struct str *s = &urlp->url_h_p;
1054
1055 s->s = salloc(urlp->url_host.l + 1 + sizeof("65536")-1 +1);
1056 memcpy(s->s, urlp->url_host.s, i = urlp->url_host.l);
1057 if (urlp->url_port != NULL) {
1058 size_t j = strlen(urlp->url_port);
1059 s->s[i++] = ':';
1060 memcpy(s->s + i, urlp->url_port, j);
1061 i += j;
1062 }
1063 s->s[i] = '\0';
1064 s->l = i;
1065 }
1066
1067 /* User, II
1068 * If there was no user in the URL, do we have *user-HOST* or *user*? */
1069 if (!(urlp->url_flags & n_URL_HAD_USER)) {
1070 if ((urlp->url_user.s = xok_vlook(user, urlp, OXM_PLAIN | OXM_H_P))
1071 == NULL) {
1072 /* No, check whether .netrc lookup is desired */
1073 # ifdef HAVE_NETRC
1074 if (!ok_blook(v15_compat) ||
1075 !xok_blook(netrc_lookup, urlp, OXM_PLAIN | OXM_H_P) ||
1076 !_nrc_lookup(urlp, FAL0))
1077 # endif
1078 urlp->url_user.s = n_UNCONST(ok_vlook(LOGNAME));
1079 }
1080
1081 urlp->url_user.l = strlen(urlp->url_user.s);
1082 urlp->url_user.s = savestrbuf(urlp->url_user.s, urlp->url_user.l);
1083 if((urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0)) == NULL){
1084 n_err(_("Cannot URL encode %s\n"), urlp->url_user.s);
1085 goto jleave;
1086 }
1087 urlp->url_user_enc.l = strlen(urlp->url_user_enc.s);
1088 }
1089
1090 /* And then there are a lot of prebuild string combinations TODO do lazy */
1091
1092 /* .url_u_h: .url_user@.url_host
1093 * For SMTP we apply ridiculously complicated *v15-compat* plus
1094 * *smtp-hostname* / *hostname* dependent rules */
1095 { struct str h, *s;
1096 size_t i;
1097
1098 if (cproto == CPROTO_SMTP && ok_blook(v15_compat) &&
1099 (cp = ok_vlook(smtp_hostname)) != NULL) {
1100 if (*cp == '\0')
1101 cp = n_nodename(TRU1);
1102 h.s = savestrbuf(cp, h.l = strlen(cp));
1103 } else
1104 h = urlp->url_host;
1105
1106 s = &urlp->url_u_h;
1107 i = urlp->url_user.l;
1108
1109 s->s = salloc(i + 1 + h.l +1);
1110 if (i > 0) {
1111 memcpy(s->s, urlp->url_user.s, i);
1112 s->s[i++] = '@';
1113 }
1114 memcpy(s->s + i, h.s, h.l +1);
1115 i += h.l;
1116 s->l = i;
1117 }
1118
1119 /* .url_u_h_p: .url_user@.url_host[:.url_port] */
1120 { struct str *s = &urlp->url_u_h_p;
1121 size_t i = urlp->url_user.l;
1122
1123 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
1124 if (i > 0) {
1125 memcpy(s->s, urlp->url_user.s, i);
1126 s->s[i++] = '@';
1127 }
1128 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
1129 i += urlp->url_h_p.l;
1130 s->l = i;
1131 }
1132
1133 /* .url_eu_h_p: .url_user_enc@.url_host[:.url_port] */
1134 { struct str *s = &urlp->url_eu_h_p;
1135 size_t i = urlp->url_user_enc.l;
1136
1137 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
1138 if (i > 0) {
1139 memcpy(s->s, urlp->url_user_enc.s, i);
1140 s->s[i++] = '@';
1141 }
1142 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
1143 i += urlp->url_h_p.l;
1144 s->l = i;
1145 }
1146
1147 /* .url_p_u_h_p: .url_proto://.url_u_h_p */
1148 { size_t i;
1149 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_u_h_p.l) +1);
1150
1151 urlp->url_proto[urlp->url_proto_len] = ':';
1152 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_u_h_p.s,
1153 urlp->url_u_h_p.l +1);
1154 urlp->url_proto[urlp->url_proto_len] = '\0';
1155
1156 urlp->url_p_u_h_p = ud;
1157 }
1158
1159 /* .url_p_eu_h_p, .url_p_eu_h_p_p: .url_proto://.url_eu_h_p[/.url_path] */
1160 { size_t i;
1161 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_eu_h_p.l) +
1162 1 + urlp->url_path.l +1);
1163
1164 urlp->url_proto[urlp->url_proto_len] = ':';
1165 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_eu_h_p.s,
1166 urlp->url_eu_h_p.l +1);
1167 urlp->url_proto[urlp->url_proto_len] = '\0';
1168
1169 if (urlp->url_path.l == 0)
1170 urlp->url_p_eu_h_p = urlp->url_p_eu_h_p_p = ud;
1171 else {
1172 urlp->url_p_eu_h_p = savestrbuf(ud, i);
1173 urlp->url_p_eu_h_p_p = ud;
1174 ud += i;
1175 *ud++ = '/';
1176 memcpy(ud, urlp->url_path.s, urlp->url_path.l +1);
1177 }
1178 }
1179
1180 rv = TRU1;
1181 #endif /* a_ANYPROTO */
1182 jleave:
1183 NYD_LEAVE;
1184 return rv;
1185 #undef a_ANYPROTO
1186 #undef a_ALLPROTO
1187 }
1188
1189 FL bool_t
1190 ccred_lookup_old(struct ccred *ccp, enum cproto cproto, char const *addr)
1191 {
1192 char const *pname, *pxstr, *authdef, *s;
1193 size_t pxlen, addrlen, i;
1194 char *vbuf;
1195 ui8_t authmask;
1196 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1197 ware = NONE;
1198 bool_t addr_is_nuser = FAL0; /* XXX v15.0 legacy! v15_compat */
1199 NYD_ENTER;
1200
1201 n_OBSOLETE(_("Use of old-style credentials, which will vanish in v15!\n"
1202 " Please read the manual section "
1203 "\"On URL syntax and credential lookup\""));
1204
1205 memset(ccp, 0, sizeof *ccp);
1206
1207 switch (cproto) {
1208 default:
1209 case CPROTO_SMTP:
1210 pname = "SMTP";
1211 pxstr = "smtp-auth";
1212 pxlen = sizeof("smtp-auth") -1;
1213 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1214 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1215 authdef = "none";
1216 addr_is_nuser = TRU1;
1217 break;
1218 case CPROTO_POP3:
1219 pname = "POP3";
1220 pxstr = "pop3-auth";
1221 pxlen = sizeof("pop3-auth") -1;
1222 authmask = AUTHTYPE_PLAIN;
1223 authdef = "plain";
1224 break;
1225 #ifdef HAVE_IMAP
1226 case CPROTO_IMAP:
1227 pname = "IMAP";
1228 pxstr = "imap-auth";
1229 pxlen = sizeof("imap-auth") -1;
1230 authmask = AUTHTYPE_LOGIN | AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1231 authdef = "login";
1232 break;
1233 #endif
1234 }
1235
1236 ccp->cc_cproto = cproto;
1237 addrlen = strlen(addr);
1238 vbuf = ac_alloc(pxlen + addrlen + sizeof("-password-")-1 +1);
1239 memcpy(vbuf, pxstr, pxlen);
1240
1241 /* Authentication type */
1242 vbuf[pxlen] = '-';
1243 memcpy(vbuf + pxlen + 1, addr, addrlen +1);
1244 if ((s = n_var_vlook(vbuf, FAL0)) == NULL) {
1245 vbuf[pxlen] = '\0';
1246 if ((s = n_var_vlook(vbuf, FAL0)) == NULL)
1247 s = n_UNCONST(authdef);
1248 }
1249
1250 if (!asccasecmp(s, "none")) {
1251 ccp->cc_auth = "NONE";
1252 ccp->cc_authtype = AUTHTYPE_NONE;
1253 /*ware = NONE;*/
1254 } else if (!asccasecmp(s, "plain")) {
1255 ccp->cc_auth = "PLAIN";
1256 ccp->cc_authtype = AUTHTYPE_PLAIN;
1257 ware = REQ_PASS | REQ_USER;
1258 } else if (!asccasecmp(s, "login")) {
1259 ccp->cc_auth = "LOGIN";
1260 ccp->cc_authtype = AUTHTYPE_LOGIN;
1261 ware = REQ_PASS | REQ_USER;
1262 } else if (!asccasecmp(s, "cram-md5")) {
1263 ccp->cc_auth = "CRAM-MD5";
1264 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1265 ware = REQ_PASS | REQ_USER;
1266 } else if (!asccasecmp(s, "gssapi")) {
1267 ccp->cc_auth = "GSS-API";
1268 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1269 ware = REQ_USER;
1270 } /* no else */
1271
1272 /* Verify method */
1273 if (!(ccp->cc_authtype & authmask)) {
1274 n_err(_("Unsupported %s authentication method: %s\n"), pname, s);
1275 ccp = NULL;
1276 goto jleave;
1277 }
1278 # ifndef HAVE_MD5
1279 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1280 n_err(_("No CRAM-MD5 support compiled in\n"));
1281 ccp = NULL;
1282 goto jleave;
1283 }
1284 # endif
1285 # ifndef HAVE_GSSAPI
1286 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1287 n_err(_("No GSS-API support compiled in\n"));
1288 ccp = NULL;
1289 goto jleave;
1290 }
1291 # endif
1292
1293 /* User name */
1294 if (!(ware & (WANT_USER | REQ_USER)))
1295 goto jpass;
1296
1297 if (!addr_is_nuser) {
1298 if ((s = _url_last_at_before_slash(addr)) != NULL) {
1299 char *cp;
1300
1301 cp = savestrbuf(addr, PTR2SIZE(s - addr));
1302
1303 if((ccp->cc_user.s = urlxdec(cp)) == NULL){
1304 n_err(_("String is not properly URL percent encoded: %s\n"), cp);
1305 ccp = NULL;
1306 goto jleave;
1307 }
1308 ccp->cc_user.l = strlen(ccp->cc_user.s);
1309 } else if (ware & REQ_USER)
1310 goto jgetuser;
1311 goto jpass;
1312 }
1313
1314 memcpy(vbuf + pxlen, "-user-", i = sizeof("-user-") -1);
1315 i += pxlen;
1316 memcpy(vbuf + i, addr, addrlen +1);
1317 if ((s = n_var_vlook(vbuf, FAL0)) == NULL) {
1318 vbuf[--i] = '\0';
1319 if ((s = n_var_vlook(vbuf, FAL0)) == NULL && (ware & REQ_USER)) {
1320 if ((s = getuser(NULL)) == NULL) {
1321 jgetuser: /* TODO v15.0: today we simply bail, but we should call getuser().
1322 * TODO even better: introduce "PROTO-user" and "PROTO-pass" and
1323 * TODO check that first, then! change control flow, grow vbuf */
1324 n_err(_("A user is necessary for %s authentication\n"), pname);
1325 ccp = NULL;
1326 goto jleave;
1327 }
1328 }
1329 }
1330 ccp->cc_user.l = strlen(ccp->cc_user.s = savestr(s));
1331
1332 /* Password */
1333 jpass:
1334 if (!(ware & (WANT_PASS | REQ_PASS)))
1335 goto jleave;
1336
1337 if (!addr_is_nuser) {
1338 memcpy(vbuf, "password-", i = sizeof("password-") -1);
1339 } else {
1340 memcpy(vbuf + pxlen, "-password-", i = sizeof("-password-") -1);
1341 i += pxlen;
1342 }
1343 memcpy(vbuf + i, addr, addrlen +1);
1344 if ((s = n_var_vlook(vbuf, FAL0)) == NULL) {
1345 vbuf[--i] = '\0';
1346 if ((!addr_is_nuser || (s = n_var_vlook(vbuf, FAL0)) == NULL) &&
1347 (ware & REQ_PASS)) {
1348 if ((s = getpassword(savecat(_("Password for "), pname))) == NULL) {
1349 n_err(_("A password is necessary for %s authentication\n"),
1350 pname);
1351 ccp = NULL;
1352 goto jleave;
1353 }
1354 }
1355 }
1356 if (s != NULL)
1357 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1358
1359 jleave:
1360 ac_free(vbuf);
1361 if (ccp != NULL && (n_poption & n_PO_D_VV))
1362 n_err(_("Credentials: host %s, user %s, pass %s\n"),
1363 addr, (ccp->cc_user.s != NULL ? ccp->cc_user.s : n_empty),
1364 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : n_empty));
1365 NYD_LEAVE;
1366 return (ccp != NULL);
1367 }
1368
1369 FL bool_t
1370 ccred_lookup(struct ccred *ccp, struct url *urlp)
1371 {
1372 char *s;
1373 char const *pstr, *authdef;
1374 ui8_t authmask;
1375 enum okeys authokey;
1376 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1377 ware;
1378 NYD_ENTER;
1379
1380 memset(ccp, 0, sizeof *ccp);
1381 ccp->cc_user = urlp->url_user;
1382
1383 ware = NONE;
1384
1385 switch ((ccp->cc_cproto = urlp->url_cproto)) {
1386 case CPROTO_CCRED:
1387 authokey = (enum okeys)-1;
1388 authmask = AUTHTYPE_PLAIN;
1389 authdef = "plain";
1390 pstr = "ccred";
1391 break;
1392 default:
1393 case CPROTO_SMTP:
1394 authokey = ok_v_smtp_auth;
1395 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1396 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1397 authdef = "plain";
1398 pstr = "smtp";
1399 break;
1400 case CPROTO_POP3:
1401 authokey = ok_v_pop3_auth;
1402 authmask = AUTHTYPE_PLAIN;
1403 authdef = "plain";
1404 pstr = "pop3";
1405 break;
1406 #ifdef HAVE_IMAP
1407 case CPROTO_IMAP:
1408 pstr = "imap";
1409 authokey = ok_v_imap_auth;
1410 authmask = AUTHTYPE_LOGIN | AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1411 authdef = "login";
1412 break;
1413 #endif
1414 }
1415
1416 /* Authentication type */
1417 if (authokey == (enum okeys)-1 ||
1418 (s = xok_VLOOK(authokey, urlp, OXM_ALL)) == NULL)
1419 s = n_UNCONST(authdef);
1420
1421 if (!asccasecmp(s, "none")) {
1422 ccp->cc_auth = "NONE";
1423 ccp->cc_authtype = AUTHTYPE_NONE;
1424 /*ware = NONE;*/
1425 } else if (!asccasecmp(s, "plain")) {
1426 ccp->cc_auth = "PLAIN";
1427 ccp->cc_authtype = AUTHTYPE_PLAIN;
1428 ware = REQ_PASS | REQ_USER;
1429 } else if (!asccasecmp(s, "login")) {
1430 ccp->cc_auth = "LOGIN";
1431 ccp->cc_authtype = AUTHTYPE_LOGIN;
1432 ware = REQ_PASS | REQ_USER;
1433 } else if (!asccasecmp(s, "cram-md5")) {
1434 ccp->cc_auth = "CRAM-MD5";
1435 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1436 ware = REQ_PASS | REQ_USER;
1437 } else if (!asccasecmp(s, "gssapi")) {
1438 ccp->cc_auth = "GSS-API";
1439 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1440 ware = REQ_USER;
1441 } /* no else */
1442
1443 /* Verify method */
1444 if (!(ccp->cc_authtype & authmask)) {
1445 n_err(_("Unsupported %s authentication method: %s\n"), pstr, s);
1446 ccp = NULL;
1447 goto jleave;
1448 }
1449 # ifndef HAVE_MD5
1450 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1451 n_err(_("No CRAM-MD5 support compiled in\n"));
1452 ccp = NULL;
1453 goto jleave;
1454 }
1455 # endif
1456 # ifndef HAVE_GSSAPI
1457 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1458 n_err(_("No GSS-API support compiled in\n"));
1459 ccp = NULL;
1460 goto jleave;
1461 }
1462 # endif
1463
1464 /* Password */
1465 ccp->cc_pass = urlp->url_pass;
1466 if (ccp->cc_pass.s != NULL)
1467 goto jleave;
1468
1469 if ((s = xok_vlook(password, urlp, OXM_ALL)) != NULL)
1470 goto js2pass;
1471 # ifdef HAVE_AGENT /* TODO v15-compat obsolete */
1472 if ((s = xok_vlook(agent_shell_lookup, urlp, OXM_ALL)) != NULL) {
1473 n_OBSOLETE(_("*agent-shell-lookup* will vanish. Please use encrypted "
1474 "~/.netrc (via *netrc-pipe*), or simply `source' an encrypted file"));
1475 if (!_agent_shell_lookup(urlp, s)) {
1476 ccp = NULL;
1477 goto jleave;
1478 } else if (urlp->url_pass.s != NULL) {
1479 ccp->cc_pass = urlp->url_pass;
1480 goto jleave;
1481 }
1482 }
1483 # endif
1484 # ifdef HAVE_NETRC
1485 if (xok_blook(netrc_lookup, urlp, OXM_ALL) && _nrc_lookup(urlp, TRU1)) {
1486 ccp->cc_pass = urlp->url_pass;
1487 goto jleave;
1488 }
1489 # endif
1490 if (ware & REQ_PASS) {
1491 if((s = getpassword(savecat(urlp->url_u_h.s, _(" requires a password: ")))
1492 ) != NULL)
1493 js2pass:
1494 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1495 else {
1496 n_err(_("A password is necessary for %s authentication\n"), pstr);
1497 ccp = NULL;
1498 }
1499 }
1500
1501 jleave:
1502 if(ccp != NULL && (n_poption & n_PO_D_VV))
1503 n_err(_("Credentials: host %s, user %s, pass %s\n"),
1504 urlp->url_h_p.s, (ccp->cc_user.s != NULL ? ccp->cc_user.s : n_empty),
1505 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : n_empty));
1506 NYD_LEAVE;
1507 return (ccp != NULL);
1508 }
1509 #endif /* HAVE_SOCKETS */
1510
1511 #ifdef HAVE_NETRC
1512 FL int
1513 c_netrc(void *v)
1514 {
1515 char **argv = v;
1516 struct nrc_node *nrc;
1517 bool_t load_only;
1518 NYD_ENTER;
1519
1520 load_only = FAL0;
1521 if (*argv == NULL)
1522 goto jlist;
1523 if (argv[1] != NULL)
1524 goto jerr;
1525 if (!asccasecmp(*argv, "show"))
1526 goto jlist;
1527 load_only = TRU1;
1528 if (!asccasecmp(*argv, "load"))
1529 goto jlist;
1530 if (!asccasecmp(*argv, "clear"))
1531 goto jclear;
1532 jerr:
1533 n_err(_("Synopsis: netrc: (<show> or) <clear> the .netrc cache\n"));
1534 v = NULL;
1535 jleave:
1536 NYD_LEAVE;
1537 return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
1538
1539 jlist: {
1540 FILE *fp;
1541 size_t l;
1542
1543 if (_nrc_list == NULL)
1544 _nrc_init();
1545 if (_nrc_list == NRC_NODE_ERR) {
1546 n_err(_("Interpolate what file?\n"));
1547 v = NULL;
1548 goto jleave;
1549 }
1550 if (load_only)
1551 goto jleave;
1552
1553 if ((fp = Ftmp(NULL, "netrc", OF_RDWR | OF_UNLINK | OF_REGISTER)) == NULL) {
1554 n_perr(_("tmpfile"), 0);
1555 v = NULL;
1556 goto jleave;
1557 }
1558
1559 for (l = 0, nrc = _nrc_list; nrc != NULL; ++l, nrc = nrc->nrc_next) {
1560 fprintf(fp, _("machine %s "), nrc->nrc_dat); /* XXX quote? */
1561 if (nrc->nrc_ulen > 0)
1562 fprintf(fp, _("login \"%s\" "),
1563 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1));
1564 if (nrc->nrc_plen > 0)
1565 fprintf(fp, _("password \"%s\"\n"),
1566 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1 + nrc->nrc_ulen +1));
1567 else
1568 putc('\n', fp);
1569 }
1570
1571 page_or_print(fp, l);
1572 Fclose(fp);
1573 }
1574 goto jleave;
1575
1576 jclear:
1577 if (_nrc_list == NRC_NODE_ERR)
1578 _nrc_list = NULL;
1579 while ((nrc = _nrc_list) != NULL) {
1580 _nrc_list = nrc->nrc_next;
1581 free(nrc);
1582 }
1583 goto jleave;
1584 }
1585 #endif /* HAVE_NETRC */
1586
1587 #ifdef HAVE_MD5
1588 FL char *
1589 md5tohex(char hex[MD5TOHEX_SIZE], void const *vp)
1590 {
1591 char const *cp = vp;
1592 size_t i, j;
1593 NYD_ENTER;
1594
1595 for (i = 0; i < MD5TOHEX_SIZE / 2; ++i) {
1596 j = i << 1;
1597 # define __hex(n) ((n) > 9 ? (n) - 10 + 'a' : (n) + '0')
1598 hex[j] = __hex((cp[i] & 0xF0) >> 4);
1599 hex[++j] = __hex(cp[i] & 0x0F);
1600 # undef __hex
1601 }
1602 NYD_LEAVE;
1603 return hex;
1604 }
1605
1606 FL char *
1607 cram_md5_string(struct str const *user, struct str const *pass,
1608 char const *b64)
1609 {
1610 struct str in, out;
1611 char digest[16], *cp;
1612 NYD_ENTER;
1613
1614 out.s = NULL;
1615 if(user->l >= UIZ_MAX - 1 - MD5TOHEX_SIZE - 1)
1616 goto jleave;
1617 if(pass->l >= INT_MAX)
1618 goto jleave;
1619
1620 in.s = n_UNCONST(b64);
1621 in.l = strlen(in.s);
1622 if(!b64_decode(&out, &in))
1623 goto jleave;
1624 if(out.l >= INT_MAX){
1625 free(out.s);
1626 out.s = NULL;
1627 goto jleave;
1628 }
1629
1630 hmac_md5((uc_i*)out.s, out.l, (uc_i*)pass->s, pass->l, digest);
1631 free(out.s);
1632 cp = md5tohex(salloc(MD5TOHEX_SIZE +1), digest);
1633
1634 in.l = user->l + MD5TOHEX_SIZE +1;
1635 in.s = ac_alloc(user->l + 1 + MD5TOHEX_SIZE +1);
1636 memcpy(in.s, user->s, user->l);
1637 in.s[user->l] = ' ';
1638 memcpy(&in.s[user->l + 1], cp, MD5TOHEX_SIZE);
1639 if(b64_encode(&out, &in, B64_SALLOC | B64_CRLF) == NULL)
1640 out.s = NULL;
1641 ac_free(in.s);
1642 jleave:
1643 NYD_LEAVE;
1644 return out.s;
1645 }
1646
1647 FL void
1648 hmac_md5(unsigned char *text, int text_len, unsigned char *key, int key_len,
1649 void *digest)
1650 {
1651 /*
1652 * This code is taken from
1653 *
1654 * Network Working Group H. Krawczyk
1655 * Request for Comments: 2104 IBM
1656 * Category: Informational M. Bellare
1657 * UCSD
1658 * R. Canetti
1659 * IBM
1660 * February 1997
1661 *
1662 *
1663 * HMAC: Keyed-Hashing for Message Authentication
1664 */
1665 md5_ctx context;
1666 unsigned char k_ipad[65]; /* inner padding - key XORd with ipad */
1667 unsigned char k_opad[65]; /* outer padding - key XORd with opad */
1668 unsigned char tk[16];
1669 int i;
1670 NYD_ENTER;
1671
1672 /* if key is longer than 64 bytes reset it to key=MD5(key) */
1673 if (key_len > 64) {
1674 md5_ctx tctx;
1675
1676 md5_init(&tctx);
1677 md5_update(&tctx, key, key_len);
1678 md5_final(tk, &tctx);
1679
1680 key = tk;
1681 key_len = 16;
1682 }
1683
1684 /* the HMAC_MD5 transform looks like:
1685 *
1686 * MD5(K XOR opad, MD5(K XOR ipad, text))
1687 *
1688 * where K is an n byte key
1689 * ipad is the byte 0x36 repeated 64 times
1690 * opad is the byte 0x5c repeated 64 times
1691 * and text is the data being protected */
1692
1693 /* start out by storing key in pads */
1694 memset(k_ipad, 0, sizeof k_ipad);
1695 memset(k_opad, 0, sizeof k_opad);
1696 memcpy(k_ipad, key, key_len);
1697 memcpy(k_opad, key, key_len);
1698
1699 /* XOR key with ipad and opad values */
1700 for (i=0; i<64; i++) {
1701 k_ipad[i] ^= 0x36;
1702 k_opad[i] ^= 0x5c;
1703 }
1704
1705 /* perform inner MD5 */
1706 md5_init(&context); /* init context for 1st pass */
1707 md5_update(&context, k_ipad, 64); /* start with inner pad */
1708 md5_update(&context, text, text_len); /* then text of datagram */
1709 md5_final(digest, &context); /* finish up 1st pass */
1710
1711 /* perform outer MD5 */
1712 md5_init(&context); /* init context for 2nd pass */
1713 md5_update(&context, k_opad, 64); /* start with outer pad */
1714 md5_update(&context, digest, 16); /* then results of 1st hash */
1715 md5_final(digest, &context); /* finish up 2nd pass */
1716 NYD_LEAVE;
1717 }
1718 #endif /* HAVE_MD5 */
1719
1720 /* s-it-mode */
A mail processing system intended to provide the functionality of the POSIX mailx(1) command