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a_main_setscreensize(): no need to test n_PSO_INTERACTIVE
[s-mailx.git] / urlcrecry.c
blobbc822963c221fdbdaf7e7294da0b0c1550d3b1c4
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 struct n_sigman sm;
113 char buffer[NRC_TOKEN_MAXLEN], host[NRC_TOKEN_MAXLEN],
114 user[NRC_TOKEN_MAXLEN], pass[NRC_TOKEN_MAXLEN], *netrc_load;
115 struct stat sb;
116 FILE * volatile fi;
117 enum nrc_token t;
118 bool_t volatile ispipe;
119 bool_t seen_default, nl_last;
120 struct nrc_node * volatile ntail, * volatile nhead, * volatile nrc;
121 NYD_ENTER;
122
123 n_UNINIT(ntail, NULL);
124 nhead = NULL;
125 nrc = NRC_NODE_ERR;
126 ispipe = FAL0;
127 fi = NULL;
128
129 n_SIGMAN_ENTER_SWITCH(&sm, n_SIGMAN_ALL) {
130 case 0:
131 break;
132 default:
133 goto jleave;
134 }
135
136 if ((netrc_load = ok_vlook(netrc_pipe)) != NULL) {
137 ispipe = TRU1;
138 if ((fi = Popen(netrc_load, "r", ok_vlook(SHELL), NULL, COMMAND_FD_NULL)
139 ) == NULL) {
140 n_perr(netrc_load, 0);
141 goto j_leave;
142 }
143 } else {
144 if ((netrc_load = fexpand(ok_vlook(NETRC), FEXP_LOCAL | FEXP_NOPROTO)
145 ) == NULL)
146 goto j_leave;
147
148 if ((fi = Fopen(netrc_load, "r")) == NULL) {
149 n_err(_("Cannot open %s\n"), n_shexp_quote_cp(netrc_load, FAL0));
150 goto j_leave;
151 }
152
153 /* Be simple and apply rigid (permission) check(s) */
154 if (fstat(fileno(fi), &sb) == -1 || !S_ISREG(sb.st_mode) ||
155 (sb.st_mode & (S_IRWXG | S_IRWXO))) {
156 n_err(_("Not a regular file, or accessible by non-user: %s\n"),
157 n_shexp_quote_cp(netrc_load, FAL0));
158 goto jleave;
159 }
160 }
161
162 seen_default = FAL0;
163 nl_last = TRU1;
164 jnext:
165 switch((t = __nrc_token(fi, buffer, &nl_last))) {
166 case NRC_NONE:
167 break;
168 default: /* Doesn't happen (but on error?), keep CC happy */
169 case NRC_DEFAULT:
170 jdef:
171 /* We ignore the default entry (require an exact host match), and we also
172 * ignore anything after such an entry (faulty syntax) */
173 seen_default = TRU1;
174 /* FALLTHRU */
175 case NRC_MACHINE:
176 jm_h:
177 /* Normalize HOST to lowercase */
178 *host = '\0';
179 if (!seen_default && (t = __nrc_token(fi, host, &nl_last)) != NRC_INPUT)
180 goto jerr;
181 else {
182 char *cp;
183 for (cp = host; *cp != '\0'; ++cp)
184 *cp = lowerconv(*cp);
185 }
186
187 *user = *pass = '\0';
188 while ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_NONE &&
189 t != NRC_MACHINE && t != NRC_DEFAULT) {
190 switch(t) {
191 case NRC_LOGIN:
192 if ((t = __nrc_token(fi, user, &nl_last)) != NRC_INPUT)
193 goto jerr;
194 break;
195 case NRC_PASSWORD:
196 if ((t = __nrc_token(fi, pass, &nl_last)) != NRC_INPUT)
197 goto jerr;
198 break;
199 case NRC_ACCOUNT:
200 if ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_INPUT)
201 goto jerr;
202 break;
203 case NRC_MACDEF:
204 if ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_INPUT)
205 goto jerr;
206 else {
207 int i = 0, c;
208 while ((c = getc(fi)) != EOF)
209 if (c == '\n') { /* xxx */
210 /* Don't care about comments here, since we parse until
211 * we've seen two successive newline characters */
212 if (i)
213 break;
214 i = 1;
215 } else
216 i = 0;
217 }
218 break;
219 default:
220 case NRC_ERROR:
221 goto jerr;
222 }
223 }
224
225 if (!seen_default && (*user != '\0' || *pass != '\0')) {
226 size_t hl = strlen(host), ul = strlen(user), pl = strlen(pass);
227 struct nrc_node *nx = smalloc(n_VSTRUCT_SIZEOF(struct nrc_node,
228 nrc_dat) + hl +1 + ul +1 + pl +1);
229
230 if (nhead != NULL)
231 ntail->nrc_next = nx;
232 else
233 nhead = nx;
234 ntail = nx;
235 nx->nrc_next = NULL;
236 nx->nrc_mlen = hl;
237 nx->nrc_ulen = ul;
238 nx->nrc_plen = pl;
239 memcpy(nx->nrc_dat, host, ++hl);
240 memcpy(nx->nrc_dat + hl, user, ++ul);
241 memcpy(nx->nrc_dat + hl + ul, pass, ++pl);
242 }
243 if (t == NRC_MACHINE)
244 goto jm_h;
245 if (t == NRC_DEFAULT)
246 goto jdef;
247 if (t != NRC_NONE)
248 goto jnext;
249 break;
250 case NRC_ERROR:
251 jerr:
252 if(n_poption & n_PO_D_V)
253 n_err(_("Errors occurred while parsing %s\n"),
254 n_shexp_quote_cp(netrc_load, FAL0));
255 assert(nrc == NRC_NODE_ERR);
256 goto jleave;
257 }
258
259 if (nhead != NULL)
260 nrc = nhead;
261 n_sigman_cleanup_ping(&sm);
262 jleave:
263 if (fi != NULL) {
264 if (ispipe)
265 Pclose(fi, TRU1);
266 else
267 Fclose(fi);
268 }
269 if (nrc == NRC_NODE_ERR)
270 while (nhead != NULL) {
271 ntail = nhead;
272 nhead = nhead->nrc_next;
273 free(ntail);
274 }
275 j_leave:
276 _nrc_list = nrc;
277 NYD_LEAVE;
278 n_sigman_leave(&sm, n_SIGMAN_VIPSIGS_NTTYOUT);
279 }
280
281 static enum nrc_token
282 __nrc_token(FILE *fi, char buffer[NRC_TOKEN_MAXLEN], bool_t *nl_last)
283 {
284 int c;
285 char *cp;
286 enum nrc_token rv;
287 NYD2_ENTER;
288
289 rv = NRC_NONE;
290 for (;;) {
291 bool_t seen_nl;
292
293 c = EOF;
294 if (feof(fi) || ferror(fi))
295 goto jleave;
296
297 for (seen_nl = *nl_last; (c = getc(fi)) != EOF && whitechar(c);)
298 seen_nl |= (c == '\n');
299
300 if (c == EOF)
301 goto jleave;
302 /* fetchmail and derived parsers support comments */
303 if ((*nl_last = seen_nl) && c == '#') {
304 while ((c = getc(fi)) != EOF && c != '\n')
305 ;
306 continue;
307 }
308 break;
309 }
310
311 cp = buffer;
312 /* Is it a quoted token? At least IBM syntax also supports ' quotes */
313 if (c == '"' || c == '\'') {
314 int quotec = c;
315
316 /* Not requiring the closing QM is (Net)BSD syntax */
317 while ((c = getc(fi)) != EOF && c != quotec) {
318 /* Reverse solidus escaping the next character is (Net)BSD syntax */
319 if (c == '\\')
320 if ((c = getc(fi)) == EOF)
321 break;
322 *cp++ = c;
323 if (PTRCMP(cp, ==, buffer + NRC_TOKEN_MAXLEN)) {
324 rv = NRC_ERROR;
325 goto jleave;
326 }
327 }
328 } else {
329 *cp++ = c;
330 while ((c = getc(fi)) != EOF && !whitechar(c)) {
331 /* Rverse solidus escaping the next character is (Net)BSD syntax */
332 if (c == '\\' && (c = getc(fi)) == EOF)
333 break;
334 *cp++ = c;
335 if (PTRCMP(cp, ==, buffer + NRC_TOKEN_MAXLEN)) {
336 rv = NRC_ERROR;
337 goto jleave;
338 }
339 }
340 *nl_last = (c == '\n');
341 }
342 *cp = '\0';
343
344 if (*buffer == '\0')
345 do {/*rv = NRC_NONE*/} while (0);
346 else if (!strcmp(buffer, "default"))
347 rv = NRC_DEFAULT;
348 else if (!strcmp(buffer, "login"))
349 rv = NRC_LOGIN;
350 else if (!strcmp(buffer, "password") || !strcmp(buffer, "passwd"))
351 rv = NRC_PASSWORD;
352 else if (!strcmp(buffer, "account"))
353 rv = NRC_ACCOUNT;
354 else if (!strcmp(buffer, "macdef"))
355 rv = NRC_MACDEF;
356 else if (!strcmp(buffer, "machine"))
357 rv = NRC_MACHINE;
358 else
359 rv = NRC_INPUT;
360 jleave:
361 if (c == EOF && !feof(fi))
362 rv = NRC_ERROR;
363 NYD2_LEAVE;
364 return rv;
365 }
366
367 static bool_t
368 _nrc_lookup(struct url *urlp, bool_t only_pass)
369 {
370 struct nrc_node *nrc, *nrc_wild, *nrc_exact;
371 bool_t rv = FAL0;
372 NYD_ENTER;
373
374 assert(!only_pass || urlp->url_user.s != NULL);
375 assert(only_pass || urlp->url_user.s == NULL);
376
377 if (_nrc_list == NULL)
378 _nrc_init();
379 if (_nrc_list == NRC_NODE_ERR)
380 goto jleave;
381
382 nrc_wild = nrc_exact = NULL;
383 for (nrc = _nrc_list; nrc != NULL; nrc = nrc->nrc_next)
384 switch (__nrc_host_match(nrc, urlp)) {
385 case 1:
386 nrc->nrc_result = nrc_exact;
387 nrc_exact = nrc;
388 continue;
389 case -1:
390 nrc->nrc_result = nrc_wild;
391 nrc_wild = nrc;
392 /* FALLTHRU */
393 case 0:
394 continue;
395 }
396
397 if (!only_pass && urlp->url_user.s == NULL) {
398 /* Must be an unambiguous entry of its kind */
399 if (nrc_exact != NULL && nrc_exact->nrc_result != NULL)
400 goto jleave;
401 if (__nrc_find_user(urlp, nrc_exact))
402 goto j_user;
403
404 if (nrc_wild != NULL && nrc_wild->nrc_result != NULL)
405 goto jleave;
406 if (!__nrc_find_user(urlp, nrc_wild))
407 goto jleave;
408 j_user:
409 ;
410 }
411
412 if (__nrc_find_pass(urlp, TRU1, nrc_exact) ||
413 __nrc_find_pass(urlp, TRU1, nrc_wild) ||
414 /* Do not try to find a password without exact user match unless we've
415 * been called during credential lookup, a.k.a. the second time */
416 !only_pass ||
417 __nrc_find_pass(urlp, FAL0, nrc_exact) ||
418 __nrc_find_pass(urlp, FAL0, nrc_wild))
419 rv = TRU1;
420 jleave:
421 NYD_LEAVE;
422 return rv;
423 }
424
425 static int
426 __nrc_host_match(struct nrc_node const *nrc, struct url const *urlp)
427 {
428 char const *d2, *d1;
429 size_t l2, l1;
430 int rv = 0;
431 NYD2_ENTER;
432
433 /* Find a matching machine -- entries are all lowercase normalized */
434 if (nrc->nrc_mlen == urlp->url_host.l) {
435 if (n_LIKELY(!memcmp(nrc->nrc_dat, urlp->url_host.s, urlp->url_host.l)))
436 rv = 1;
437 goto jleave;
438 }
439
440 /* Cannot be an exact match, but maybe the .netrc machine starts with
441 * a "*." glob, which we recognize as an extension, meaning "skip
442 * a single subdomain, then match the rest" */
443 d1 = nrc->nrc_dat + 2;
444 l1 = nrc->nrc_mlen;
445 if (l1 <= 2 || d1[-1] != '.' || d1[-2] != '*')
446 goto jleave;
447 l1 -= 2;
448
449 /* Brute skipping over one subdomain, no RFC 1035 or RFC 1122 checks;
450 * in fact this even succeeds for ".host.com", but - why care, here? */
451 d2 = urlp->url_host.s;
452 l2 = urlp->url_host.l;
453 while (l2 > 0) {
454 --l2;
455 if (*d2++ == '.')
456 break;
457 }
458
459 if (l2 == l1 && !memcmp(d1, d2, l1))
460 /* This matches, but we won't use it directly but watch out for an
461 * exact match first! */
462 rv = -1;
463 jleave:
464 NYD2_LEAVE;
465 return rv;
466 }
467
468 static bool_t
469 __nrc_find_user(struct url *urlp, struct nrc_node const *nrc)
470 {
471 NYD2_ENTER;
472
473 for (; nrc != NULL; nrc = nrc->nrc_result)
474 if (nrc->nrc_ulen > 0) {
475 /* Fake it was part of URL otherwise XXX */
476 urlp->url_had_user = TRU1;
477 /* That buffer will be duplicated by url_parse() in this case! */
478 urlp->url_user.s = n_UNCONST(nrc->nrc_dat + nrc->nrc_mlen +1);
479 urlp->url_user.l = nrc->nrc_ulen;
480 break;
481 }
482
483 NYD2_LEAVE;
484 return (nrc != NULL);
485 }
486
487 static bool_t
488 __nrc_find_pass(struct url *urlp, bool_t user_match, struct nrc_node const *nrc)
489 {
490 NYD2_ENTER;
491
492 for (; nrc != NULL; nrc = nrc->nrc_result) {
493 bool_t um = (nrc->nrc_ulen == urlp->url_user.l &&
494 !memcmp(nrc->nrc_dat + nrc->nrc_mlen +1, urlp->url_user.s,
495 urlp->url_user.l));
496
497 if (user_match) {
498 if (!um)
499 continue;
500 } else if (!um && nrc->nrc_ulen > 0)
501 continue;
502 if (nrc->nrc_plen == 0)
503 continue;
504
505 /* We are responsible for duplicating this buffer! */
506 urlp->url_pass.s = savestrbuf(nrc->nrc_dat + nrc->nrc_mlen +1 +
507 nrc->nrc_ulen + 1, (urlp->url_pass.l = nrc->nrc_plen));
508 break;
509 }
510
511 NYD2_LEAVE;
512 return (nrc != NULL);
513 }
514 #endif /* HAVE_NETRC */
515
516 #ifdef HAVE_AGENT
517 static bool_t
518 _agent_shell_lookup(struct url *urlp, char const *comm) /* TODO v15-compat */
519 {
520 char buf[128];
521 char const *env_addon[8];
522 struct str s;
523 FILE *pbuf;
524 union {int c; sighandler_type sht;} u;
525 size_t cl, l;
526 bool_t rv = FAL0;
527 NYD2_ENTER;
528
529 env_addon[0] = str_concat_csvl(&s, "NAIL_USER", "=", urlp->url_user.s,
530 NULL)->s;
531 env_addon[1] = str_concat_csvl(&s,
532 "NAIL_USER_ENC", "=", urlp->url_user_enc.s, NULL)->s;
533 env_addon[2] = str_concat_csvl(&s, "NAIL_HOST", "=", urlp->url_host.s,
534 NULL)->s;
535 env_addon[3] = str_concat_csvl(&s, "NAIL_HOST_PORT", "=", urlp->url_h_p.s,
536 NULL)->s;
537 env_addon[4] = NULL;
538
539 if ((pbuf = Popen(comm, "r", ok_vlook(SHELL), env_addon, -1)) == NULL) {
540 n_err(_("*agent-shell-lookup* startup failed (%s)\n"), comm);
541 goto jleave;
542 }
543
544 for (s.s = NULL, s.l = cl = l = 0; (u.c = getc(pbuf)) != EOF; ++cl) {
545 if (u.c == '\n') /* xxx */
546 continue;
547 buf[l++] = u.c;
548 if (l == sizeof(buf) - 1) {
549 n_str_add_buf(&s, buf, l);
550 l = 0;
551 }
552 }
553 if (l > 0)
554 n_str_add_buf(&s, buf, l);
555
556 if (!Pclose(pbuf, TRU1)) {
557 n_err(_("*agent-shell-lookup* execution failure (%s)\n"), comm);
558 goto jleave;
559 }
560
561 /* We are responsible for duplicating this buffer! */
562 if (s.s != NULL)
563 urlp->url_pass.s = savestrbuf(s.s, urlp->url_pass.l = s.l);
564 else if (cl > 0)
565 urlp->url_pass.s = n_UNCONST(n_empty), urlp->url_pass.l = 0;
566 rv = TRU1;
567 jleave:
568 if (s.s != NULL)
569 free(s.s);
570 NYD2_LEAVE;
571 return rv;
572 }
573 #endif /* HAVE_AGENT */
574
575 FL char *
576 (urlxenc)(char const *cp, bool_t ispath n_MEMORY_DEBUG_ARGS)
577 {
578 char *n, *np, c1;
579 NYD2_ENTER;
580
581 /* C99 */{
582 size_t i;
583
584 i = strlen(cp);
585 if(i >= UIZ_MAX / 3){
586 n = NULL;
587 goto jleave;
588 }
589 i *= 3;
590 ++i;
591 np = n = (n_autorec_alloc)(NULL, i n_MEMORY_DEBUG_ARGSCALL);
592 }
593
594 for (; (c1 = *cp) != '\0'; ++cp) {
595 /* (RFC 1738) RFC 3986, 2.3 Unreserved Characters:
596 * ALPHA / DIGIT / "-" / "." / "_" / "~"
597 * However add a special is[file]path mode for file-system friendliness */
598 if (alnumchar(c1) || c1 == '_')
599 *np++ = c1;
600 else if (!ispath) {
601 if (c1 != '-' && c1 != '.' && c1 != '~')
602 goto jesc;
603 *np++ = c1;
604 } else if (PTRCMP(np, >, n) && (*cp == '-' || *cp == '.')) /* XXX imap */
605 *np++ = c1;
606 else {
607 jesc:
608 np[0] = '%';
609 n_c_to_hex_base16(np + 1, c1);
610 np += 3;
611 }
612 }
613 *np = '\0';
614 jleave:
615 NYD2_LEAVE;
616 return n;
617 }
618
619 FL char *
620 (urlxdec)(char const *cp n_MEMORY_DEBUG_ARGS)
621 {
622 char *n, *np;
623 si32_t c;
624 NYD2_ENTER;
625
626 np = n = (n_autorec_alloc)(NULL, strlen(cp) +1 n_MEMORY_DEBUG_ARGSCALL);
627
628 while ((c = (uc_i)*cp++) != '\0') {
629 if (c == '%' && cp[0] != '\0' && cp[1] != '\0') {
630 si32_t o = c;
631 if (n_LIKELY((c = n_c_from_hex_base16(cp)) >= '\0'))
632 cp += 2;
633 else
634 c = o;
635 }
636 *np++ = (char)c;
637 }
638 *np = '\0';
639 NYD2_LEAVE;
640 return n;
641 }
642
643 FL int
644 c_urlcodec(void *v){
645 struct n_string s_b, *sp;
646 bool_t ispath;
647 char const **argv, *varname, *varres, *cp;
648 NYD_ENTER;
649
650 sp = n_string_creat_auto(&s_b);
651 argv = v;
652 varname = (n_pstate & n_PS_ARGMOD_VPUT) ? *argv++ : NULL;
653
654 if(*(cp = *argv) == 'p'){
655 if(!ascncasecmp(++cp, "ath", 3))
656 cp += 3;
657 ispath = TRU1;
658 }
659
660 while(*++argv != NULL){
661 if(sp->s_len > 0)
662 sp = n_string_push_c(sp, ' ');
663 sp = n_string_push_cp(sp, *argv);
664 }
665
666 if(is_asccaseprefix(cp, "encode")){
667 if((varres = urlxenc(n_string_cp(sp), ispath)) == NULL){
668 varres = sp->s_dat;
669 v = NULL;
670 }
671 }else if(is_asccaseprefix(cp, "decode")){
672 if((varres = urlxdec(n_string_cp(sp))) == NULL){
673 varres = sp->s_dat;
674 v = NULL;
675 }
676 }else{
677 n_err(_("`urlcodec': invalid subcommand: %s\n"), cp);
678 cp = NULL;
679 goto jleave;
680 }
681
682 assert(cp != NULL);
683 if(varname != NULL){
684 if(!n_var_vset(varname, (uintptr_t)varres)){
685 cp = NULL;
686 v = NULL;
687 }
688 }else{
689 struct str in, out;
690
691 in.l = strlen(in.s = n_UNCONST(varres));
692 makeprint(&in, &out);
693 if(fprintf(n_stdout, "%s\n", out.s) < 0)
694 cp = NULL;
695 free(out.s);
696 }
697
698 if(v != NULL)
699 n_pstate_var__em = n_0;
700 jleave:
701 NYD_LEAVE;
702 return (cp != NULL ? 0 : 1);
703 }
704
705 FL int
706 c_urlencode(void *v) /* XXX IDNA?? */
707 {
708 char **ap;
709 NYD_ENTER;
710
711 n_OBSOLETE("`urlencode': please use `urlcodec enc[ode]' instead");
712
713 for (ap = v; *ap != NULL; ++ap) {
714 char *in = *ap, *out = urlxenc(in, FAL0);
715
716 if(out == NULL)
717 out = n_UNCONST(V_(n_error));
718 fprintf(n_stdout,
719 " in: <%s> (%" PRIuZ " bytes)\nout: <%s> (%" PRIuZ " bytes)\n",
720 in, strlen(in), out, strlen(out));
721 }
722 NYD_LEAVE;
723 return 0;
724 }
725
726 FL int
727 c_urldecode(void *v) /* XXX IDNA?? */
728 {
729 char **ap;
730 NYD_ENTER;
731
732 n_OBSOLETE("`urldecode': please use `urlcodec dec[ode]' instead");
733
734 for (ap = v; *ap != NULL; ++ap) {
735 char *in = *ap, *out = urlxdec(in);
736
737 if(out == NULL)
738 out = n_UNCONST(V_(n_error));
739 fprintf(n_stdout,
740 " in: <%s> (%" PRIuZ " bytes)\nout: <%s> (%" PRIuZ " bytes)\n",
741 in, strlen(in), out, strlen(out));
742 }
743 NYD_LEAVE;
744 return 0;
745 }
746
747 FL char *
748 url_mailto_to_address(char const *mailtop){ /* TODO hack! RFC 6068; factory? */
749 size_t i;
750 char *rv;
751 char const *mailtop_orig;
752 NYD_ENTER;
753
754 if(!is_prefix("mailto:", mailtop_orig = mailtop)){
755 rv = NULL;
756 goto jleave;
757 }
758 mailtop += sizeof("mailto:") -1;
759
760 /* TODO This is all intermediate, and for now just enough to understand
761 * TODO a little bit of a little more advanced List-Post: headers. */
762 /* Strip any hfield additions, keep only to addr-spec's */
763 if((rv = strchr(mailtop, '?')) != NULL)
764 rv = savestrbuf(mailtop, i = PTR2SIZE(rv - mailtop));
765 else
766 rv = savestrbuf(mailtop, i = strlen(mailtop));
767
768 i = strlen(rv);
769
770 /* Simply perform percent-decoding if there is a percent % */
771 if(memchr(rv, '%', i) != NULL){
772 char *rv_base;
773 bool_t err;
774
775 for(err = FAL0, mailtop = rv_base = rv; i > 0;){
776 char c;
777
778 if((c = *mailtop++) == '%'){
779 si32_t cc;
780
781 if(i < 3 || (cc = n_c_from_hex_base16(mailtop)) < 0){
782 if(!err && (err = TRU1, n_poption & n_PO_D_V))
783 n_err(_("Invalid RFC 6068 'mailto' URL: %s\n"),
784 n_shexp_quote_cp(mailtop_orig, FAL0));
785 goto jhex_putc;
786 }
787 *rv++ = (char)cc;
788 mailtop += 2;
789 i -= 3;
790 }else{
791 jhex_putc:
792 *rv++ = c;
793 --i;
794 }
795 }
796 *rv = '\0';
797 rv = rv_base;
798 }
799 jleave:
800 NYD_LEAVE;
801 return rv;
802 }
803
804 FL char const *
805 n_servbyname(char const *proto, ui16_t *irv_or_null){
806 static struct{
807 char const name[14];
808 char const port[8];
809 ui16_t portno;
810 } const tbl[] = {
811 { "smtp", "25", 25},
812 { "submission", "587", 587},
813 { "smtps", "465", 465},
814 { "pop3", "110", 110},
815 { "pop3s", "995", 995},
816 { "imap", "143", 143},
817 { "imaps", "993", 993},
818 { "file", "", 0}
819 };
820 char const *rv;
821 size_t l, i;
822 NYD2_ENTER;
823
824 for(rv = proto; *rv != '\0'; ++rv)
825 if(*rv == ':')
826 break;
827 l = PTR2SIZE(rv - proto);
828
829 for(rv = NULL, i = 0; i < n_NELEM(tbl); ++i)
830 if(!ascncasecmp(tbl[i].name, proto, l)){
831 rv = tbl[i].port;
832 if(irv_or_null != NULL)
833 *irv_or_null = tbl[i].portno;
834 break;
835 }
836 NYD2_LEAVE;
837 return rv;
838 }
839
840 #ifdef HAVE_SOCKETS /* Note: not indented for that -- later: file:// etc.! */
841 FL bool_t
842 url_parse(struct url *urlp, enum cproto cproto, char const *data)
843 {
844 #if defined HAVE_SMTP && defined HAVE_POP3
845 # define __ALLPROTO
846 #endif
847 #if defined HAVE_SMTP || defined HAVE_POP3
848 # define __ANYPROTO
849 char *cp, *x;
850 #endif
851 bool_t rv = FAL0;
852 NYD_ENTER;
853 n_UNUSED(data);
854
855 memset(urlp, 0, sizeof *urlp);
856 urlp->url_input = data;
857 urlp->url_cproto = cproto;
858
859 /* Network protocol */
860 #define _protox(X,Y) \
861 urlp->url_portno = Y;\
862 memcpy(urlp->url_proto, X "://", sizeof(X "://"));\
863 urlp->url_proto[sizeof(X) -1] = '\0';\
864 urlp->url_proto_len = sizeof(X) -1;\
865 urlp->url_proto_xlen = sizeof(X "://") -1
866 #define __if(X,Y,Z) \
867 if (!ascncasecmp(data, X "://", sizeof(X "://") -1)) {\
868 _protox(X, Y);\
869 data += sizeof(X "://") -1;\
870 do { Z; } while (0);\
871 goto juser;\
872 }
873 #define _if(X,Y) __if(X, Y, (void)0)
874 #ifdef HAVE_SSL
875 # define _ifs(X,Y) __if(X, Y, urlp->url_needs_tls = TRU1)
876 #else
877 # define _ifs(X,Y) goto jeproto;
878 #endif
879
880 switch (cproto) {
881 case CPROTO_CCRED:
882 /* The special S/MIME etc. credential lookup */
883 #if defined HAVE_SSL
884 _protox("ccred", 0);
885 break;
886 #else
887 goto jeproto;
888 #endif
889 case CPROTO_SMTP:
890 #ifdef HAVE_SMTP
891 _if ("smtp", 25)
892 _if ("submission", 587)
893 _ifs ("smtps", 465)
894 _protox("smtp", 25);
895 break;
896 #else
897 goto jeproto;
898 #endif
899 case CPROTO_POP3:
900 #ifdef HAVE_POP3
901 _if ("pop3", 110)
902 _ifs ("pop3s", 995)
903 _protox("pop3", 110);
904 break;
905 #else
906 goto jeproto;
907 #endif
908 #if 0
909 case CPROTO_IMAP:
910 _if ("imap", 143)
911 _ifs ("imaps", 993)
912 _protox("imap", 143);
913 break;
914 goto jeproto;
915 #endif
916 }
917
918 #undef _ifs
919 #undef _if
920 #undef __if
921 #undef _protox
922
923 if (strstr(data, "://") != NULL) {
924 #if !defined __ALLPROTO || !defined HAVE_SSL
925 jeproto:
926 #endif
927 n_err(_("URL proto:// prefix invalid: %s\n"), urlp->url_input);
928 goto jleave;
929 }
930 #ifdef __ANYPROTO
931
932 /* User and password, I */
933 juser:
934 if ((cp = _url_last_at_before_slash(data)) != NULL) {
935 size_t l;
936 char const *urlpe, *d;
937 char *ub;
938
939 l = PTR2SIZE(cp - data);
940 ub = ac_alloc(l +1);
941 d = data;
942 urlp->url_had_user = TRU1;
943 data = &cp[1];
944
945 /* And also have a password? */
946 if((cp = memchr(d, ':', l)) != NULL){
947 size_t i = PTR2SIZE(cp - d);
948
949 l -= i + 1;
950 memcpy(ub, cp + 1, l);
951 ub[l] = '\0';
952
953 if((urlp->url_pass.s = urlxdec(ub)) == NULL)
954 goto jurlp_err;
955 urlp->url_pass.l = strlen(urlp->url_pass.s);
956 if((urlpe = urlxenc(urlp->url_pass.s, FAL0)) == NULL)
957 goto jurlp_err;
958 if(strcmp(ub, urlpe))
959 goto jurlp_err;
960 l = i;
961 }
962
963 memcpy(ub, d, l);
964 ub[l] = '\0';
965 if((urlp->url_user.s = urlxdec(ub)) == NULL)
966 goto jurlp_err;
967 urlp->url_user.l = strlen(urlp->url_user.s);
968 if((urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0)) == NULL)
969 goto jurlp_err;
970 urlp->url_user_enc.l = strlen(urlp->url_user_enc.s);
971
972 if(urlp->url_user_enc.l != l || memcmp(urlp->url_user_enc.s, ub, l)){
973 jurlp_err:
974 n_err(_("String is not properly URL percent encoded: %s\n"), ub);
975 d = NULL;
976 }
977
978 ac_free(ub);
979 if(d == NULL)
980 goto jleave;
981 }
982
983 /* Servername and port -- and possible path suffix */
984 if ((cp = strchr(data, ':')) != NULL) { /* TODO URL parse, IPv6 support */
985 urlp->url_port = x = savestr(x = &cp[1]);
986 if ((x = strchr(x, '/')) != NULL) {
987 *x = '\0';
988 while(*++x == '/')
989 ;
990 }
991
992 if((n_idec_ui16_cp(&urlp->url_portno, urlp->url_port, 10, NULL
993 ) & (n_IDEC_STATE_EMASK | n_IDEC_STATE_CONSUMED)
994 ) != n_IDEC_STATE_CONSUMED){
995 n_err(_("URL with invalid port number: %s\n"), urlp->url_input);
996 goto jleave;
997 }
998 } else {
999 if ((x = strchr(data, '/')) != NULL) {
1000 data = savestrbuf(data, PTR2SIZE(x - data));
1001 while(*++x == '/')
1002 ;
1003 }
1004 cp = n_UNCONST(data + strlen(data));
1005 }
1006
1007 /* A (non-empty) path may only occur with IMAP */
1008 if (x != NULL && *x != '\0') {
1009 /* Take care not to count adjacent slashes for real, on either end */
1010 char *x2;
1011 size_t i;
1012
1013 for(x2 = savestrbuf(x, i = strlen(x)); i > 0; --i)
1014 if(x2[i - 1] != '/')
1015 break;
1016 x2[i] = '\0';
1017
1018 if (i > 0) {
1019 #if 0
1020 if (cproto != CPROTO_IMAP) {
1021 #endif
1022 n_err(_("URL protocol doesn't support paths: \"%s\"\n"),
1023 urlp->url_input);
1024 goto jleave;
1025 #if 0
1026 }
1027 urlp->url_path.l = i;
1028 urlp->url_path.s = x2;
1029 #endif
1030 }
1031 }
1032
1033 urlp->url_host.s = savestrbuf(data, urlp->url_host.l = PTR2SIZE(cp - data));
1034 { size_t i;
1035 for (cp = urlp->url_host.s, i = urlp->url_host.l; i != 0; ++cp, --i)
1036 *cp = lowerconv(*cp);
1037 }
1038
1039 /* .url_h_p: HOST:PORT */
1040 { size_t i;
1041 struct str *s = &urlp->url_h_p;
1042
1043 s->s = salloc(urlp->url_host.l + 1 + sizeof("65536")-1 +1);
1044 memcpy(s->s, urlp->url_host.s, i = urlp->url_host.l);
1045 if (urlp->url_port != NULL) {
1046 size_t j = strlen(urlp->url_port);
1047 s->s[i++] = ':';
1048 memcpy(s->s + i, urlp->url_port, j);
1049 i += j;
1050 }
1051 s->s[i] = '\0';
1052 s->l = i;
1053 }
1054
1055 /* User, II
1056 * If there was no user in the URL, do we have *user-HOST* or *user*? */
1057 if (!urlp->url_had_user) {
1058 if ((urlp->url_user.s = xok_vlook(user, urlp, OXM_PLAIN | OXM_H_P))
1059 == NULL) {
1060 /* No, check whether .netrc lookup is desired */
1061 # ifdef HAVE_NETRC
1062 if (!ok_blook(v15_compat) ||
1063 !xok_blook(netrc_lookup, urlp, OXM_PLAIN | OXM_H_P) ||
1064 !_nrc_lookup(urlp, FAL0))
1065 # endif
1066 urlp->url_user.s = n_UNCONST(ok_vlook(LOGNAME));
1067 }
1068
1069 urlp->url_user.l = strlen(urlp->url_user.s);
1070 urlp->url_user.s = savestrbuf(urlp->url_user.s, urlp->url_user.l);
1071 if((urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0)) == NULL){
1072 n_err(_("Cannot URL encode %s\n"), urlp->url_user.s);
1073 goto jleave;
1074 }
1075 urlp->url_user_enc.l = strlen(urlp->url_user_enc.s);
1076 }
1077
1078 /* And then there are a lot of prebuild string combinations TODO do lazy */
1079
1080 /* .url_u_h: .url_user@.url_host
1081 * For SMTP we apply ridiculously complicated *v15-compat* plus
1082 * *smtp-hostname* / *hostname* dependent rules */
1083 { struct str h, *s;
1084 size_t i;
1085
1086 if (cproto == CPROTO_SMTP && ok_blook(v15_compat) &&
1087 (cp = ok_vlook(smtp_hostname)) != NULL) {
1088 if (*cp == '\0')
1089 cp = nodename(1);
1090 h.s = savestrbuf(cp, h.l = strlen(cp));
1091 } else
1092 h = urlp->url_host;
1093
1094 s = &urlp->url_u_h;
1095 i = urlp->url_user.l;
1096
1097 s->s = salloc(i + 1 + h.l +1);
1098 if (i > 0) {
1099 memcpy(s->s, urlp->url_user.s, i);
1100 s->s[i++] = '@';
1101 }
1102 memcpy(s->s + i, h.s, h.l +1);
1103 i += h.l;
1104 s->l = i;
1105 }
1106
1107 /* .url_u_h_p: .url_user@.url_host[:.url_port] */
1108 { struct str *s = &urlp->url_u_h_p;
1109 size_t i = urlp->url_user.l;
1110
1111 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
1112 if (i > 0) {
1113 memcpy(s->s, urlp->url_user.s, i);
1114 s->s[i++] = '@';
1115 }
1116 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
1117 i += urlp->url_h_p.l;
1118 s->l = i;
1119 }
1120
1121 /* .url_eu_h_p: .url_user_enc@.url_host[:.url_port] */
1122 { struct str *s = &urlp->url_eu_h_p;
1123 size_t i = urlp->url_user_enc.l;
1124
1125 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
1126 if (i > 0) {
1127 memcpy(s->s, urlp->url_user_enc.s, i);
1128 s->s[i++] = '@';
1129 }
1130 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
1131 i += urlp->url_h_p.l;
1132 s->l = i;
1133 }
1134
1135 /* .url_p_u_h_p: .url_proto://.url_u_h_p */
1136 { size_t i;
1137 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_u_h_p.l) +1);
1138
1139 urlp->url_proto[urlp->url_proto_len] = ':';
1140 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_u_h_p.s,
1141 urlp->url_u_h_p.l +1);
1142 urlp->url_proto[urlp->url_proto_len] = '\0';
1143
1144 urlp->url_p_u_h_p = ud;
1145 }
1146
1147 /* .url_p_eu_h_p, .url_p_eu_h_p_p: .url_proto://.url_eu_h_p[/.url_path] */
1148 { size_t i;
1149 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_eu_h_p.l) +
1150 1 + urlp->url_path.l +1);
1151
1152 urlp->url_proto[urlp->url_proto_len] = ':';
1153 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_eu_h_p.s,
1154 urlp->url_eu_h_p.l +1);
1155 urlp->url_proto[urlp->url_proto_len] = '\0';
1156
1157 if (urlp->url_path.l == 0)
1158 urlp->url_p_eu_h_p = urlp->url_p_eu_h_p_p = ud;
1159 else {
1160 urlp->url_p_eu_h_p = savestrbuf(ud, i);
1161 urlp->url_p_eu_h_p_p = ud;
1162 ud += i;
1163 *ud++ = '/';
1164 memcpy(ud, urlp->url_path.s, urlp->url_path.l +1);
1165 }
1166 }
1167
1168 rv = TRU1;
1169 #endif /* __ANYPROTO */
1170 jleave:
1171 NYD_LEAVE;
1172 return rv;
1173 #undef __ANYPROTO
1174 #undef __ALLPROTO
1175 }
1176
1177 FL bool_t
1178 ccred_lookup_old(struct ccred *ccp, enum cproto cproto, char const *addr)
1179 {
1180 char const *pname, *pxstr, *authdef, *s;
1181 size_t pxlen, addrlen, i;
1182 char *vbuf;
1183 ui8_t authmask;
1184 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1185 ware = NONE;
1186 bool_t addr_is_nuser = FAL0; /* XXX v15.0 legacy! v15_compat */
1187 NYD_ENTER;
1188
1189 n_OBSOLETE(_("Use of old-style credentials, which will vanish in v15!\n"
1190 " Please read the manual section "
1191 "\"On URL syntax and credential lookup\""));
1192
1193 memset(ccp, 0, sizeof *ccp);
1194
1195 switch (cproto) {
1196 default:
1197 case CPROTO_SMTP:
1198 pname = "SMTP";
1199 pxstr = "smtp-auth";
1200 pxlen = sizeof("smtp-auth") -1;
1201 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1202 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1203 authdef = "none";
1204 addr_is_nuser = TRU1;
1205 break;
1206 case CPROTO_POP3:
1207 pname = "POP3";
1208 pxstr = "pop3-auth";
1209 pxlen = sizeof("pop3-auth") -1;
1210 authmask = AUTHTYPE_PLAIN;
1211 authdef = "plain";
1212 break;
1213 }
1214
1215 ccp->cc_cproto = cproto;
1216 addrlen = strlen(addr);
1217 vbuf = ac_alloc(pxlen + addrlen + sizeof("-password-")-1 +1);
1218 memcpy(vbuf, pxstr, pxlen);
1219
1220 /* Authentication type */
1221 vbuf[pxlen] = '-';
1222 memcpy(vbuf + pxlen + 1, addr, addrlen +1);
1223 if ((s = n_var_vlook(vbuf, FAL0)) == NULL) {
1224 vbuf[pxlen] = '\0';
1225 if ((s = n_var_vlook(vbuf, FAL0)) == NULL)
1226 s = n_UNCONST(authdef);
1227 }
1228
1229 if (!asccasecmp(s, "none")) {
1230 ccp->cc_auth = "NONE";
1231 ccp->cc_authtype = AUTHTYPE_NONE;
1232 /*ware = NONE;*/
1233 } else if (!asccasecmp(s, "plain")) {
1234 ccp->cc_auth = "PLAIN";
1235 ccp->cc_authtype = AUTHTYPE_PLAIN;
1236 ware = REQ_PASS | REQ_USER;
1237 } else if (!asccasecmp(s, "login")) {
1238 ccp->cc_auth = "LOGIN";
1239 ccp->cc_authtype = AUTHTYPE_LOGIN;
1240 ware = REQ_PASS | REQ_USER;
1241 } else if (!asccasecmp(s, "cram-md5")) {
1242 ccp->cc_auth = "CRAM-MD5";
1243 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1244 ware = REQ_PASS | REQ_USER;
1245 } else if (!asccasecmp(s, "gssapi")) {
1246 ccp->cc_auth = "GSS-API";
1247 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1248 ware = REQ_USER;
1249 } /* no else */
1250
1251 /* Verify method */
1252 if (!(ccp->cc_authtype & authmask)) {
1253 n_err(_("Unsupported %s authentication method: %s\n"), pname, s);
1254 ccp = NULL;
1255 goto jleave;
1256 }
1257 # ifndef HAVE_MD5
1258 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1259 n_err(_("No CRAM-MD5 support compiled in\n"));
1260 ccp = NULL;
1261 goto jleave;
1262 }
1263 # endif
1264 # ifndef HAVE_GSSAPI
1265 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1266 n_err(_("No GSS-API support compiled in\n"));
1267 ccp = NULL;
1268 goto jleave;
1269 }
1270 # endif
1271
1272 /* User name */
1273 if (!(ware & (WANT_USER | REQ_USER)))
1274 goto jpass;
1275
1276 if (!addr_is_nuser) {
1277 if ((s = _url_last_at_before_slash(addr)) != NULL) {
1278 char *cp;
1279
1280 cp = savestrbuf(addr, PTR2SIZE(s - addr));
1281
1282 if((ccp->cc_user.s = urlxdec(cp)) == NULL){
1283 n_err(_("String is not properly URL percent encoded: %s\n"), cp);
1284 ccp = NULL;
1285 goto jleave;
1286 }
1287 ccp->cc_user.l = strlen(ccp->cc_user.s);
1288 } else if (ware & REQ_USER)
1289 goto jgetuser;
1290 goto jpass;
1291 }
1292
1293 memcpy(vbuf + pxlen, "-user-", i = sizeof("-user-") -1);
1294 i += pxlen;
1295 memcpy(vbuf + i, addr, addrlen +1);
1296 if ((s = n_var_vlook(vbuf, FAL0)) == NULL) {
1297 vbuf[--i] = '\0';
1298 if ((s = n_var_vlook(vbuf, FAL0)) == NULL && (ware & REQ_USER)) {
1299 if ((s = getuser(NULL)) == NULL) {
1300 jgetuser: /* TODO v15.0: today we simply bail, but we should call getuser().
1301 * TODO even better: introduce "PROTO-user" and "PROTO-pass" and
1302 * TODO check that first, then! change control flow, grow vbuf */
1303 n_err(_("A user is necessary for %s authentication\n"), pname);
1304 ccp = NULL;
1305 goto jleave;
1306 }
1307 }
1308 }
1309 ccp->cc_user.l = strlen(ccp->cc_user.s = savestr(s));
1310
1311 /* Password */
1312 jpass:
1313 if (!(ware & (WANT_PASS | REQ_PASS)))
1314 goto jleave;
1315
1316 if (!addr_is_nuser) {
1317 memcpy(vbuf, "password-", i = sizeof("password-") -1);
1318 } else {
1319 memcpy(vbuf + pxlen, "-password-", i = sizeof("-password-") -1);
1320 i += pxlen;
1321 }
1322 memcpy(vbuf + i, addr, addrlen +1);
1323 if ((s = n_var_vlook(vbuf, FAL0)) == NULL) {
1324 vbuf[--i] = '\0';
1325 if ((!addr_is_nuser || (s = n_var_vlook(vbuf, FAL0)) == NULL) &&
1326 (ware & REQ_PASS)) {
1327 if ((s = getpassword(savecat(_("Password for "), pname))) == NULL) {
1328 n_err(_("A password is necessary for %s authentication\n"),
1329 pname);
1330 ccp = NULL;
1331 goto jleave;
1332 }
1333 }
1334 }
1335 if (s != NULL)
1336 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1337
1338 jleave:
1339 ac_free(vbuf);
1340 if (ccp != NULL && (n_poption & n_PO_D_VV))
1341 n_err(_("Credentials: host %s, user %s, pass %s\n"),
1342 addr, (ccp->cc_user.s != NULL ? ccp->cc_user.s : n_empty),
1343 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : n_empty));
1344 NYD_LEAVE;
1345 return (ccp != NULL);
1346 }
1347
1348 FL bool_t
1349 ccred_lookup(struct ccred *ccp, struct url *urlp)
1350 {
1351 char *s;
1352 char const *pstr, *authdef;
1353 ui8_t authmask;
1354 enum okeys authokey;
1355 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1356 ware;
1357 NYD_ENTER;
1358
1359 memset(ccp, 0, sizeof *ccp);
1360 ccp->cc_user = urlp->url_user;
1361
1362 ware = NONE;
1363
1364 switch ((ccp->cc_cproto = urlp->url_cproto)) {
1365 case CPROTO_CCRED:
1366 authokey = (enum okeys)-1;
1367 authmask = AUTHTYPE_PLAIN;
1368 authdef = "plain";
1369 pstr = "ccred";
1370 break;
1371 default:
1372 case CPROTO_SMTP:
1373 authokey = ok_v_smtp_auth;
1374 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1375 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1376 authdef = "plain";
1377 pstr = "smtp";
1378 break;
1379 case CPROTO_POP3:
1380 authokey = ok_v_pop3_auth;
1381 authmask = AUTHTYPE_PLAIN;
1382 authdef = "plain";
1383 pstr = "pop3";
1384 break;
1385 }
1386
1387 /* Authentication type */
1388 if (authokey == (enum okeys)-1 ||
1389 (s = xok_VLOOK(authokey, urlp, OXM_ALL)) == NULL)
1390 s = n_UNCONST(authdef);
1391
1392 if (!asccasecmp(s, "none")) {
1393 ccp->cc_auth = "NONE";
1394 ccp->cc_authtype = AUTHTYPE_NONE;
1395 /*ware = NONE;*/
1396 } else if (!asccasecmp(s, "plain")) {
1397 ccp->cc_auth = "PLAIN";
1398 ccp->cc_authtype = AUTHTYPE_PLAIN;
1399 ware = REQ_PASS | REQ_USER;
1400 } else if (!asccasecmp(s, "login")) {
1401 ccp->cc_auth = "LOGIN";
1402 ccp->cc_authtype = AUTHTYPE_LOGIN;
1403 ware = REQ_PASS | REQ_USER;
1404 } else if (!asccasecmp(s, "cram-md5")) {
1405 ccp->cc_auth = "CRAM-MD5";
1406 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1407 ware = REQ_PASS | REQ_USER;
1408 } else if (!asccasecmp(s, "gssapi")) {
1409 ccp->cc_auth = "GSS-API";
1410 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1411 ware = REQ_USER;
1412 } /* no else */
1413
1414 /* Verify method */
1415 if (!(ccp->cc_authtype & authmask)) {
1416 n_err(_("Unsupported %s authentication method: %s\n"), pstr, s);
1417 ccp = NULL;
1418 goto jleave;
1419 }
1420 # ifndef HAVE_MD5
1421 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1422 n_err(_("No CRAM-MD5 support compiled in\n"));
1423 ccp = NULL;
1424 goto jleave;
1425 }
1426 # endif
1427 # ifndef HAVE_GSSAPI
1428 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1429 n_err(_("No GSS-API support compiled in\n"));
1430 ccp = NULL;
1431 goto jleave;
1432 }
1433 # endif
1434
1435 /* Password */
1436 ccp->cc_pass = urlp->url_pass;
1437 if (ccp->cc_pass.s != NULL)
1438 goto jleave;
1439
1440 if ((s = xok_vlook(password, urlp, OXM_ALL)) != NULL)
1441 goto js2pass;
1442 # ifdef HAVE_AGENT /* TODO v15-compat obsolete */
1443 if ((s = xok_vlook(agent_shell_lookup, urlp, OXM_ALL)) != NULL) {
1444 n_OBSOLETE(_("*agent-shell-lookup* will vanish. Please use encrypted "
1445 "~/.netrc (via *netrc-pipe*), or simply `source' an encrypted file"));
1446 if (!_agent_shell_lookup(urlp, s)) {
1447 ccp = NULL;
1448 goto jleave;
1449 } else if (urlp->url_pass.s != NULL) {
1450 ccp->cc_pass = urlp->url_pass;
1451 goto jleave;
1452 }
1453 }
1454 # endif
1455 # ifdef HAVE_NETRC
1456 if (xok_blook(netrc_lookup, urlp, OXM_ALL) && _nrc_lookup(urlp, TRU1)) {
1457 ccp->cc_pass = urlp->url_pass;
1458 goto jleave;
1459 }
1460 # endif
1461 if (ware & REQ_PASS) {
1462 if((s = getpassword(savecat(urlp->url_u_h.s, _(" requires a password: ")))
1463 ) != NULL)
1464 js2pass:
1465 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1466 else {
1467 n_err(_("A password is necessary for %s authentication\n"), pstr);
1468 ccp = NULL;
1469 }
1470 }
1471
1472 jleave:
1473 if(ccp != NULL && (n_poption & n_PO_D_VV))
1474 n_err(_("Credentials: host %s, user %s, pass %s\n"),
1475 urlp->url_h_p.s, (ccp->cc_user.s != NULL ? ccp->cc_user.s : n_empty),
1476 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : n_empty));
1477 NYD_LEAVE;
1478 return (ccp != NULL);
1479 }
1480 #endif /* HAVE_SOCKETS */
1481
1482 #ifdef HAVE_NETRC
1483 FL int
1484 c_netrc(void *v)
1485 {
1486 char **argv = v;
1487 struct nrc_node *nrc;
1488 bool_t load_only;
1489 NYD_ENTER;
1490
1491 load_only = FAL0;
1492 if (*argv == NULL)
1493 goto jlist;
1494 if (argv[1] != NULL)
1495 goto jerr;
1496 if (!asccasecmp(*argv, "show"))
1497 goto jlist;
1498 load_only = TRU1;
1499 if (!asccasecmp(*argv, "load"))
1500 goto jlist;
1501 if (!asccasecmp(*argv, "clear"))
1502 goto jclear;
1503 jerr:
1504 n_err(_("Synopsis: netrc: (<show> or) <clear> the .netrc cache\n"));
1505 v = NULL;
1506 jleave:
1507 NYD_LEAVE;
1508 return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
1509
1510 jlist: {
1511 FILE *fp;
1512 size_t l;
1513
1514 if (_nrc_list == NULL)
1515 _nrc_init();
1516 if (_nrc_list == NRC_NODE_ERR) {
1517 n_err(_("Interpolate what file?\n"));
1518 v = NULL;
1519 goto jleave;
1520 }
1521 if (load_only)
1522 goto jleave;
1523
1524 if ((fp = Ftmp(NULL, "netrc", OF_RDWR | OF_UNLINK | OF_REGISTER)) == NULL) {
1525 n_perr(_("tmpfile"), 0);
1526 v = NULL;
1527 goto jleave;
1528 }
1529
1530 for (l = 0, nrc = _nrc_list; nrc != NULL; ++l, nrc = nrc->nrc_next) {
1531 fprintf(fp, _("machine %s "), nrc->nrc_dat); /* XXX quote? */
1532 if (nrc->nrc_ulen > 0)
1533 fprintf(fp, _("login \"%s\" "),
1534 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1));
1535 if (nrc->nrc_plen > 0)
1536 fprintf(fp, _("password \"%s\"\n"),
1537 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1 + nrc->nrc_ulen +1));
1538 else
1539 putc('\n', fp);
1540 }
1541
1542 page_or_print(fp, l);
1543 Fclose(fp);
1544 }
1545 goto jleave;
1546
1547 jclear:
1548 if (_nrc_list == NRC_NODE_ERR)
1549 _nrc_list = NULL;
1550 while ((nrc = _nrc_list) != NULL) {
1551 _nrc_list = nrc->nrc_next;
1552 free(nrc);
1553 }
1554 goto jleave;
1555 }
1556 #endif /* HAVE_NETRC */
1557
1558 #ifdef HAVE_MD5
1559 FL char *
1560 md5tohex(char hex[MD5TOHEX_SIZE], void const *vp)
1561 {
1562 char const *cp = vp;
1563 size_t i, j;
1564 NYD_ENTER;
1565
1566 for (i = 0; i < MD5TOHEX_SIZE / 2; ++i) {
1567 j = i << 1;
1568 # define __hex(n) ((n) > 9 ? (n) - 10 + 'a' : (n) + '0')
1569 hex[j] = __hex((cp[i] & 0xF0) >> 4);
1570 hex[++j] = __hex(cp[i] & 0x0F);
1571 # undef __hex
1572 }
1573 NYD_LEAVE;
1574 return hex;
1575 }
1576
1577 FL char *
1578 cram_md5_string(struct str const *user, struct str const *pass,
1579 char const *b64)
1580 {
1581 struct str in, out;
1582 char digest[16], *cp;
1583 NYD_ENTER;
1584
1585 out.s = NULL;
1586 if(user->l >= UIZ_MAX - 1 - MD5TOHEX_SIZE - 1)
1587 goto jleave;
1588 if(pass->l >= INT_MAX)
1589 goto jleave;
1590
1591 in.s = n_UNCONST(b64);
1592 in.l = strlen(in.s);
1593 if(!b64_decode(&out, &in))
1594 goto jleave;
1595 if(out.l >= INT_MAX){
1596 free(out.s);
1597 out.s = NULL;
1598 goto jleave;
1599 }
1600
1601 hmac_md5((uc_i*)out.s, out.l, (uc_i*)pass->s, pass->l, digest);
1602 free(out.s);
1603 cp = md5tohex(salloc(MD5TOHEX_SIZE +1), digest);
1604
1605 in.l = user->l + MD5TOHEX_SIZE +1;
1606 in.s = ac_alloc(user->l + 1 + MD5TOHEX_SIZE +1);
1607 memcpy(in.s, user->s, user->l);
1608 in.s[user->l] = ' ';
1609 memcpy(&in.s[user->l + 1], cp, MD5TOHEX_SIZE);
1610 if(b64_encode(&out, &in, B64_SALLOC | B64_CRLF) == NULL)
1611 out.s = NULL;
1612 ac_free(in.s);
1613 jleave:
1614 NYD_LEAVE;
1615 return out.s;
1616 }
1617
1618 FL void
1619 hmac_md5(unsigned char *text, int text_len, unsigned char *key, int key_len,
1620 void *digest)
1621 {
1622 /*
1623 * This code is taken from
1624 *
1625 * Network Working Group H. Krawczyk
1626 * Request for Comments: 2104 IBM
1627 * Category: Informational M. Bellare
1628 * UCSD
1629 * R. Canetti
1630 * IBM
1631 * February 1997
1632 *
1633 *
1634 * HMAC: Keyed-Hashing for Message Authentication
1635 */
1636 md5_ctx context;
1637 unsigned char k_ipad[65]; /* inner padding - key XORd with ipad */
1638 unsigned char k_opad[65]; /* outer padding - key XORd with opad */
1639 unsigned char tk[16];
1640 int i;
1641 NYD_ENTER;
1642
1643 /* if key is longer than 64 bytes reset it to key=MD5(key) */
1644 if (key_len > 64) {
1645 md5_ctx tctx;
1646
1647 md5_init(&tctx);
1648 md5_update(&tctx, key, key_len);
1649 md5_final(tk, &tctx);
1650
1651 key = tk;
1652 key_len = 16;
1653 }
1654
1655 /* the HMAC_MD5 transform looks like:
1656 *
1657 * MD5(K XOR opad, MD5(K XOR ipad, text))
1658 *
1659 * where K is an n byte key
1660 * ipad is the byte 0x36 repeated 64 times
1661 * opad is the byte 0x5c repeated 64 times
1662 * and text is the data being protected */
1663
1664 /* start out by storing key in pads */
1665 memset(k_ipad, 0, sizeof k_ipad);
1666 memset(k_opad, 0, sizeof k_opad);
1667 memcpy(k_ipad, key, key_len);
1668 memcpy(k_opad, key, key_len);
1669
1670 /* XOR key with ipad and opad values */
1671 for (i=0; i<64; i++) {
1672 k_ipad[i] ^= 0x36;
1673 k_opad[i] ^= 0x5c;
1674 }
1675
1676 /* perform inner MD5 */
1677 md5_init(&context); /* init context for 1st pass */
1678 md5_update(&context, k_ipad, 64); /* start with inner pad */
1679 md5_update(&context, text, text_len); /* then text of datagram */
1680 md5_final(digest, &context); /* finish up 1st pass */
1681
1682 /* perform outer MD5 */
1683 md5_init(&context); /* init context for 2nd pass */
1684 md5_update(&context, k_opad, 64); /* start with outer pad */
1685 md5_update(&context, digest, 16); /* then results of 1st hash */
1686 md5_final(digest, &context); /* finish up 2nd pass */
1687 NYD_LEAVE;
1688 }
1689 #endif /* HAVE_MD5 */
1690
1691 /* s-it-mode */
A mail processing system intended to provide the functionality of the POSIX mailx(1) command