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Add *r-option-implicit* (Felipe Gasper, Martin Neitzel)..
[s-mailx.git] / urlcrecry.c
blob3a12525f18dbe4d3361b90a760278e5df332e7e0
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 - 2016 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 * fi;
117 enum nrc_token t;
118 bool_t ispipe, seen_default, nl_last;
119 struct nrc_node *ntail, *nhead, *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 n_SIGMAN_ENTER_SWITCH(&sm, n_SIGMAN_ALL) {
129 case 0:
130 break;
131 default:
132 goto jleave;
133 }
134
135 if ((netrc_load = ok_vlook(netrc_pipe)) != NULL) {
136 ispipe = TRU1;
137 if ((fi = Popen(netrc_load, "r", ok_vlook(SHELL), NULL, COMMAND_FD_NULL)
138 ) == NULL) {
139 n_perr(netrc_load, 0);
140 goto j_leave;
141 }
142 } else {
143 if ((netrc_load = fexpand(ok_vlook(NETRC), FEXP_LOCAL | FEXP_NOPROTO)
144 ) == NULL)
145 goto j_leave;
146
147 if ((fi = Fopen(netrc_load, "r")) == NULL) {
148 n_err(_("Cannot open %s\n"), n_shexp_quote_cp(netrc_load, FAL0));
149 goto j_leave;
150 }
151
152 /* Be simple and apply rigid (permission) check(s) */
153 if (fstat(fileno(fi), &sb) == -1 || !S_ISREG(sb.st_mode) ||
154 (sb.st_mode & (S_IRWXG | S_IRWXO))) {
155 n_err(_("Not a regular file, or accessible by non-user: %s\n"),
156 n_shexp_quote_cp(netrc_load, FAL0));
157 goto jleave;
158 }
159 }
160
161 seen_default = FAL0;
162 nl_last = TRU1;
163 jnext:
164 switch((t = __nrc_token(fi, buffer, &nl_last))) {
165 case NRC_NONE:
166 break;
167 default: /* Doesn't happen (but on error?), keep CC happy */
168 case NRC_DEFAULT:
169 jdef:
170 /* We ignore the default entry (require an exact host match), and we also
171 * ignore anything after such an entry (faulty syntax) */
172 seen_default = TRU1;
173 /* FALLTHRU */
174 case NRC_MACHINE:
175 jm_h:
176 /* Normalize HOST to lowercase */
177 *host = '\0';
178 if (!seen_default && (t = __nrc_token(fi, host, &nl_last)) != NRC_INPUT)
179 goto jerr;
180 else {
181 char *cp;
182 for (cp = host; *cp != '\0'; ++cp)
183 *cp = lowerconv(*cp);
184 }
185
186 *user = *pass = '\0';
187 while ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_NONE &&
188 t != NRC_MACHINE && t != NRC_DEFAULT) {
189 switch(t) {
190 case NRC_LOGIN:
191 if ((t = __nrc_token(fi, user, &nl_last)) != NRC_INPUT)
192 goto jerr;
193 break;
194 case NRC_PASSWORD:
195 if ((t = __nrc_token(fi, pass, &nl_last)) != NRC_INPUT)
196 goto jerr;
197 break;
198 case NRC_ACCOUNT:
199 if ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_INPUT)
200 goto jerr;
201 break;
202 case NRC_MACDEF:
203 if ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_INPUT)
204 goto jerr;
205 else {
206 int i = 0, c;
207 while ((c = getc(fi)) != EOF)
208 if (c == '\n') { /* xxx */
209 /* Don't care about comments here, since we parse until
210 * we've seen two successive newline characters */
211 if (i)
212 break;
213 i = 1;
214 } else
215 i = 0;
216 }
217 break;
218 default:
219 case NRC_ERROR:
220 goto jerr;
221 }
222 }
223
224 if (!seen_default && (*user != '\0' || *pass != '\0')) {
225 size_t hl = strlen(host), ul = strlen(user), pl = strlen(pass);
226 struct nrc_node *nx = smalloc(n_VSTRUCT_SIZEOF(struct nrc_node,
227 nrc_dat) + hl +1 + ul +1 + pl +1);
228
229 if (nhead != NULL)
230 ntail->nrc_next = nx;
231 else
232 nhead = nx;
233 ntail = nx;
234 nx->nrc_next = NULL;
235 nx->nrc_mlen = hl;
236 nx->nrc_ulen = ul;
237 nx->nrc_plen = pl;
238 memcpy(nx->nrc_dat, host, ++hl);
239 memcpy(nx->nrc_dat + hl, user, ++ul);
240 memcpy(nx->nrc_dat + hl + ul, pass, ++pl);
241 }
242 if (t == NRC_MACHINE)
243 goto jm_h;
244 if (t == NRC_DEFAULT)
245 goto jdef;
246 if (t != NRC_NONE)
247 goto jnext;
248 break;
249 case NRC_ERROR:
250 jerr:
251 if (options & OPT_D_V)
252 n_err(_("Errors occurred while parsing %s\n"),
253 n_shexp_quote_cp(netrc_load, FAL0));
254 assert(nrc == NRC_NODE_ERR);
255 goto jleave;
256 }
257
258 if (nhead != NULL)
259 nrc = nhead;
260 n_sigman_cleanup_ping(&sm);
261 jleave:
262 if (fi != NULL) {
263 if (ispipe)
264 Pclose(fi, TRU1);
265 else
266 Fclose(fi);
267 }
268 if (nrc == NRC_NODE_ERR)
269 while (nhead != NULL) {
270 ntail = nhead;
271 nhead = nhead->nrc_next;
272 free(ntail);
273 }
274 j_leave:
275 _nrc_list = nrc;
276 NYD_LEAVE;
277 n_sigman_leave(&sm, n_SIGMAN_VIPSIGS_NTTYOUT);
278 }
279
280 static enum nrc_token
281 __nrc_token(FILE *fi, char buffer[NRC_TOKEN_MAXLEN], bool_t *nl_last)
282 {
283 int c;
284 char *cp;
285 enum nrc_token rv;
286 NYD2_ENTER;
287
288 rv = NRC_NONE;
289 for (;;) {
290 bool_t seen_nl;
291
292 c = EOF;
293 if (feof(fi) || ferror(fi))
294 goto jleave;
295
296 for (seen_nl = *nl_last; (c = getc(fi)) != EOF && whitechar(c);)
297 seen_nl |= (c == '\n');
298
299 if (c == EOF)
300 goto jleave;
301 /* fetchmail and derived parsers support comments */
302 if ((*nl_last = seen_nl) && c == '#') {
303 while ((c = getc(fi)) != EOF && c != '\n')
304 ;
305 continue;
306 }
307 break;
308 }
309
310 cp = buffer;
311 /* Is it a quoted token? At least IBM syntax also supports ' quotes */
312 if (c == '"' || c == '\'') {
313 int quotec = c;
314
315 /* Not requiring the closing QM is (Net)BSD syntax */
316 while ((c = getc(fi)) != EOF && c != quotec) {
317 /* Backslash escaping the next character is (Net)BSD syntax */
318 if (c == '\\')
319 if ((c = getc(fi)) == EOF)
320 break;
321 *cp++ = c;
322 if (PTRCMP(cp, ==, buffer + NRC_TOKEN_MAXLEN)) {
323 rv = NRC_ERROR;
324 goto jleave;
325 }
326 }
327 } else {
328 *cp++ = c;
329 while ((c = getc(fi)) != EOF && !whitechar(c)) {
330 /* Backslash escaping the next character is (Net)BSD syntax */
331 if (c == '\\' && (c = getc(fi)) == EOF)
332 break;
333 *cp++ = c;
334 if (PTRCMP(cp, ==, buffer + NRC_TOKEN_MAXLEN)) {
335 rv = NRC_ERROR;
336 goto jleave;
337 }
338 }
339 *nl_last = (c == '\n');
340 }
341 *cp = '\0';
342
343 if (*buffer == '\0')
344 do {/*rv = NRC_NONE*/} while (0);
345 else if (!strcmp(buffer, "default"))
346 rv = NRC_DEFAULT;
347 else if (!strcmp(buffer, "login"))
348 rv = NRC_LOGIN;
349 else if (!strcmp(buffer, "password") || !strcmp(buffer, "passwd"))
350 rv = NRC_PASSWORD;
351 else if (!strcmp(buffer, "account"))
352 rv = NRC_ACCOUNT;
353 else if (!strcmp(buffer, "macdef"))
354 rv = NRC_MACDEF;
355 else if (!strcmp(buffer, "machine"))
356 rv = NRC_MACHINE;
357 else
358 rv = NRC_INPUT;
359 jleave:
360 if (c == EOF && !feof(fi))
361 rv = NRC_ERROR;
362 NYD2_LEAVE;
363 return rv;
364 }
365
366 static bool_t
367 _nrc_lookup(struct url *urlp, bool_t only_pass)
368 {
369 struct nrc_node *nrc, *nrc_wild, *nrc_exact;
370 bool_t rv = FAL0;
371 NYD_ENTER;
372
373 assert(!only_pass || urlp->url_user.s != NULL);
374 assert(only_pass || urlp->url_user.s == NULL);
375
376 if (_nrc_list == NULL)
377 _nrc_init();
378 if (_nrc_list == NRC_NODE_ERR)
379 goto jleave;
380
381 nrc_wild = nrc_exact = NULL;
382 for (nrc = _nrc_list; nrc != NULL; nrc = nrc->nrc_next)
383 switch (__nrc_host_match(nrc, urlp)) {
384 case 1:
385 nrc->nrc_result = nrc_exact;
386 nrc_exact = nrc;
387 continue;
388 case -1:
389 nrc->nrc_result = nrc_wild;
390 nrc_wild = nrc;
391 /* FALLTHRU */
392 case 0:
393 continue;
394 }
395
396 if (!only_pass && urlp->url_user.s == NULL) {
397 /* Must be an unambiguous entry of its kind */
398 if (nrc_exact != NULL && nrc_exact->nrc_result != NULL)
399 goto jleave;
400 if (__nrc_find_user(urlp, nrc_exact))
401 goto j_user;
402
403 if (nrc_wild != NULL && nrc_wild->nrc_result != NULL)
404 goto jleave;
405 if (!__nrc_find_user(urlp, nrc_wild))
406 goto jleave;
407 j_user:
408 ;
409 }
410
411 if (__nrc_find_pass(urlp, TRU1, nrc_exact) ||
412 __nrc_find_pass(urlp, TRU1, nrc_wild) ||
413 /* Do not try to find a password without exact user match unless we've
414 * been called during credential lookup, a.k.a. the second time */
415 !only_pass ||
416 __nrc_find_pass(urlp, FAL0, nrc_exact) ||
417 __nrc_find_pass(urlp, FAL0, nrc_wild))
418 rv = TRU1;
419 jleave:
420 NYD_LEAVE;
421 return rv;
422 }
423
424 static int
425 __nrc_host_match(struct nrc_node const *nrc, struct url const *urlp)
426 {
427 char const *d2, *d1;
428 size_t l2, l1;
429 int rv = 0;
430 NYD2_ENTER;
431
432 /* Find a matching machine -- entries are all lowercase normalized */
433 if (nrc->nrc_mlen == urlp->url_host.l) {
434 if (n_LIKELY(!memcmp(nrc->nrc_dat, urlp->url_host.s, urlp->url_host.l)))
435 rv = 1;
436 goto jleave;
437 }
438
439 /* Cannot be an exact match, but maybe the .netrc machine starts with
440 * a "*." glob, which we recognize as an extension, meaning "skip
441 * a single subdomain, then match the rest" */
442 d1 = nrc->nrc_dat + 2;
443 l1 = nrc->nrc_mlen;
444 if (l1 <= 2 || d1[-1] != '.' || d1[-2] != '*')
445 goto jleave;
446 l1 -= 2;
447
448 /* Brute skipping over one subdomain, no RFC 1035 or RFC 1122 checks;
449 * in fact this even succeeds for ".host.com", but - why care, here? */
450 d2 = urlp->url_host.s;
451 l2 = urlp->url_host.l;
452 while (l2 > 0) {
453 --l2;
454 if (*d2++ == '.')
455 break;
456 }
457
458 if (l2 == l1 && !memcmp(d1, d2, l1))
459 /* This matches, but we won't use it directly but watch out for an
460 * exact match first! */
461 rv = -1;
462 jleave:
463 NYD2_LEAVE;
464 return rv;
465 }
466
467 static bool_t
468 __nrc_find_user(struct url *urlp, struct nrc_node const *nrc)
469 {
470 NYD2_ENTER;
471
472 for (; nrc != NULL; nrc = nrc->nrc_result)
473 if (nrc->nrc_ulen > 0) {
474 /* Fake it was part of URL otherwise XXX */
475 urlp->url_had_user = TRU1;
476 /* That buffer will be duplicated by url_parse() in this case! */
477 urlp->url_user.s = n_UNCONST(nrc->nrc_dat + nrc->nrc_mlen +1);
478 urlp->url_user.l = nrc->nrc_ulen;
479 break;
480 }
481
482 NYD2_LEAVE;
483 return (nrc != NULL);
484 }
485
486 static bool_t
487 __nrc_find_pass(struct url *urlp, bool_t user_match, struct nrc_node const *nrc)
488 {
489 NYD2_ENTER;
490
491 for (; nrc != NULL; nrc = nrc->nrc_result) {
492 bool_t um = (nrc->nrc_ulen == urlp->url_user.l &&
493 !memcmp(nrc->nrc_dat + nrc->nrc_mlen +1, urlp->url_user.s,
494 urlp->url_user.l));
495
496 if (user_match) {
497 if (!um)
498 continue;
499 } else if (!um && nrc->nrc_ulen > 0)
500 continue;
501 if (nrc->nrc_plen == 0)
502 continue;
503
504 /* We are responsible for duplicating this buffer! */
505 urlp->url_pass.s = savestrbuf(nrc->nrc_dat + nrc->nrc_mlen +1 +
506 nrc->nrc_ulen + 1, (urlp->url_pass.l = nrc->nrc_plen));
507 break;
508 }
509
510 NYD2_LEAVE;
511 return (nrc != NULL);
512 }
513 #endif /* HAVE_NETRC */
514
515 #ifdef HAVE_AGENT
516 static bool_t
517 _agent_shell_lookup(struct url *urlp, char const *comm) /* TODO v15-compat */
518 {
519 char buf[128];
520 char const *env_addon[8];
521 struct str s;
522 FILE *pbuf;
523 union {int c; sighandler_type sht;} u;
524 size_t cl, l;
525 bool_t rv = FAL0;
526 NYD2_ENTER;
527
528 env_addon[0] = str_concat_csvl(&s, AGENT_USER, "=", urlp->url_user.s,
529 NULL)->s;
530 env_addon[1] = str_concat_csvl(&s, AGENT_USER_ENC, "=", urlp->url_user_enc.s,
531 NULL)->s;
532 env_addon[2] = str_concat_csvl(&s, AGENT_HOST, "=", urlp->url_host.s,
533 NULL)->s;
534 env_addon[3] = str_concat_csvl(&s, AGENT_HOST_PORT, "=", urlp->url_h_p.s,
535 NULL)->s;
536 env_addon[4] = str_concat_csvl(&s, NAILENV_TMPDIR, /* TODO v15 */
537 "=", ok_vlook(TMPDIR), NULL)->s;
538
539 env_addon[5] = NULL;
540
541 if ((pbuf = Popen(comm, "r", ok_vlook(SHELL), env_addon, -1)) == NULL) {
542 n_err(_("*agent-shell-lookup* startup failed (%s)\n"), comm);
543 goto jleave;
544 }
545
546 for (s.s = NULL, s.l = cl = l = 0; (u.c = getc(pbuf)) != EOF; ++cl) {
547 if (u.c == '\n') /* xxx */
548 continue;
549 buf[l++] = u.c;
550 if (l == sizeof(buf) - 1) {
551 n_str_add_buf(&s, buf, l);
552 l = 0;
553 }
554 }
555 if (l > 0)
556 n_str_add_buf(&s, buf, l);
557
558 if (!Pclose(pbuf, TRU1)) {
559 n_err(_("*agent-shell-lookup* execution failure (%s)\n"), comm);
560 goto jleave;
561 }
562
563 /* We are responsible for duplicating this buffer! */
564 if (s.s != NULL)
565 urlp->url_pass.s = savestrbuf(s.s, urlp->url_pass.l = s.l);
566 else if (cl > 0)
567 urlp->url_pass.s = n_UNCONST(n_empty), urlp->url_pass.l = 0;
568 rv = TRU1;
569 jleave:
570 if (s.s != NULL)
571 free(s.s);
572 NYD2_LEAVE;
573 return rv;
574 }
575 #endif /* HAVE_AGENT */
576
577 FL char *
578 (urlxenc)(char const *cp, bool_t ispath n_MEMORY_DEBUG_ARGS)
579 {
580 char *n, *np, c1;
581 NYD2_ENTER;
582
583 /* C99 */{
584 size_t i;
585
586 i = strlen(cp);
587 if(i >= UIZ_MAX / 3){
588 n = NULL;
589 goto jleave;
590 }
591 i *= 3;
592 ++i;
593 np = n = (n_autorec_alloc)(NULL, i n_MEMORY_DEBUG_ARGSCALL);
594 }
595
596 for (; (c1 = *cp) != '\0'; ++cp) {
597 /* (RFC 1738) RFC 3986, 2.3 Unreserved Characters:
598 * ALPHA / DIGIT / "-" / "." / "_" / "~"
599 * However add a special is[file]path mode for file-system friendliness */
600 if (alnumchar(c1) || c1 == '_')
601 *np++ = c1;
602 else if (!ispath) {
603 if (c1 != '-' && c1 != '.' && c1 != '~')
604 goto jesc;
605 *np++ = c1;
606 } else if (PTRCMP(np, >, n) && (*cp == '-' || *cp == '.')) /* XXX imap */
607 *np++ = c1;
608 else {
609 jesc:
610 np[0] = '%';
611 n_c_to_hex_base16(np + 1, c1);
612 np += 3;
613 }
614 }
615 *np = '\0';
616 jleave:
617 NYD2_LEAVE;
618 return n;
619 }
620
621 FL char *
622 (urlxdec)(char const *cp n_MEMORY_DEBUG_ARGS)
623 {
624 char *n, *np;
625 si32_t c;
626 NYD2_ENTER;
627
628 np = n = (n_autorec_alloc)(NULL, strlen(cp) +1 n_MEMORY_DEBUG_ARGSCALL);
629
630 while ((c = (uc_i)*cp++) != '\0') {
631 if (c == '%' && cp[0] != '\0' && cp[1] != '\0') {
632 si32_t o = c;
633 if (n_LIKELY((c = n_c_from_hex_base16(cp)) >= '\0'))
634 cp += 2;
635 else
636 c = o;
637 }
638 *np++ = (char)c;
639 }
640 *np = '\0';
641 NYD2_LEAVE;
642 return n;
643 }
644
645 FL int
646 c_urlcodec(void *v){
647 bool_t ispath;
648 char const **argv, *cp, *res;
649 NYD_ENTER;
650
651 if(*(cp = *(argv = v)) == 'p'){
652 if(!ascncasecmp(++cp, "ath", 3))
653 cp += 3;
654 ispath = TRU1;
655 }
656
657 if(is_prefix(cp, "encode")){
658 while((cp = *++argv) != NULL){
659 if((res = urlxenc(cp, ispath)) == NULL)
660 res = V_(n_error);
661 printf(" in: %s (%" PRIuZ " bytes)\nout: %s (%" PRIuZ " bytes)\n",
662 cp, strlen(cp), res, strlen(res));
663 }
664 }else if(is_prefix(cp, "decode")){
665 struct str in, out;
666
667 while((cp = *++argv) != NULL){
668 if((res = urlxdec(cp)) == NULL)
669 res = V_(n_error);
670 in.l = strlen(in.s = n_UNCONST(res)); /* logical */
671 makeprint(&in, &out);
672 printf(" in: %s (%" PRIuZ " bytes)\nout: %s (%" PRIuZ " bytes)\n",
673 cp, strlen(cp), out.s, in.l);
674 free(out.s);
675 }
676 }else{
677 n_err(_("`urlcodec': invalid subcommand: %s\n"), *argv);
678 cp = NULL;
679 }
680 NYD_LEAVE;
681 return (cp != NULL ? OKAY : STOP);
682 }
683
684 FL char *
685 url_mailto_to_address(char const *mailtop){ /* TODO hack! RFC 6068; factory? */
686 size_t i;
687 char *rv;
688 char const *mailtop_orig;
689 NYD_ENTER;
690
691 if(!is_prefix("mailto:", mailtop_orig = mailtop)){
692 rv = NULL;
693 goto jleave;
694 }
695 mailtop += sizeof("mailto:") -1;
696
697 /* TODO This is all intermediate, and for now just enough to understand
698 * TODO a little bit of a little more advanced List-Post: headers. */
699 /* Strip any hfield additions, keep only to addr-spec's */
700 if((rv = strchr(mailtop, '?')) != NULL)
701 rv = savestrbuf(mailtop, i = PTR2SIZE(rv - mailtop));
702 else
703 rv = savestrbuf(mailtop, i = strlen(mailtop));
704
705 i = strlen(rv);
706
707 /* Simply perform percent-decoding if there is a percent % */
708 if(memchr(rv, '%', i) != NULL){
709 char *rv_base;
710 bool_t err;
711
712 for(err = FAL0, mailtop = rv_base = rv; i > 0;){
713 char c;
714
715 if((c = *mailtop++) == '%'){
716 si32_t cc;
717
718 if(i < 3 || (cc = n_c_from_hex_base16(mailtop)) < 0){
719 if(!err && (err = TRU1, options & OPT_D_V))
720 n_err(_("Invalid RFC 6068 'mailto' URL: %s\n"),
721 n_shexp_quote_cp(mailtop_orig, FAL0));
722 goto jhex_putc;
723 }
724 *rv++ = (char)cc;
725 mailtop += 2;
726 i -= 3;
727 }else{
728 jhex_putc:
729 *rv++ = c;
730 --i;
731 }
732 }
733 *rv = '\0';
734 rv = rv_base;
735 }
736 jleave:
737 NYD_LEAVE;
738 return rv;
739 }
740
741 FL char const *
742 n_servbyname(char const *proto, ui16_t *irv_or_null){
743 static struct{
744 char const name[14];
745 char const port[8];
746 ui16_t portno;
747 } const tbl[] = {
748 { "smtp", "25", 25},
749 { "submission", "587", 587},
750 { "smtps", "465", 465},
751 { "pop3", "110", 110},
752 { "pop3s", "995", 995},
753 { "imap", "143", 143},
754 { "imaps", "993", 993},
755 { "file", "", 0}
756 };
757 char const *rv;
758 size_t l, i;
759 NYD2_ENTER;
760
761 for(rv = proto; *rv != '\0'; ++rv)
762 if(*rv == ':')
763 break;
764 l = PTR2SIZE(rv - proto);
765
766 for(rv = NULL, i = 0; i < n_NELEM(tbl); ++i)
767 if(!ascncasecmp(tbl[i].name, proto, l)){
768 rv = tbl[i].port;
769 if(irv_or_null != NULL)
770 *irv_or_null = tbl[i].portno;
771 break;
772 }
773 NYD2_LEAVE;
774 return rv;
775 }
776
777 #ifdef HAVE_SOCKETS /* Note: not indented for that -- later: file:// etc.! */
778 FL bool_t
779 url_parse(struct url *urlp, enum cproto cproto, char const *data)
780 {
781 #if defined HAVE_SMTP && defined HAVE_POP3
782 # define __ALLPROTO
783 #endif
784 #if defined HAVE_SMTP || defined HAVE_POP3
785 # define __ANYPROTO
786 char *cp, *x;
787 #endif
788 bool_t rv = FAL0;
789 NYD_ENTER;
790 n_UNUSED(data);
791
792 memset(urlp, 0, sizeof *urlp);
793 urlp->url_input = data;
794 urlp->url_cproto = cproto;
795
796 /* Network protocol */
797 #define _protox(X,Y) \
798 urlp->url_portno = Y;\
799 memcpy(urlp->url_proto, X "://", sizeof(X "://"));\
800 urlp->url_proto[sizeof(X) -1] = '\0';\
801 urlp->url_proto_len = sizeof(X) -1;\
802 urlp->url_proto_xlen = sizeof(X "://") -1
803 #define __if(X,Y,Z) \
804 if (!ascncasecmp(data, X "://", sizeof(X "://") -1)) {\
805 _protox(X, Y);\
806 data += sizeof(X "://") -1;\
807 do { Z; } while (0);\
808 goto juser;\
809 }
810 #define _if(X,Y) __if(X, Y, (void)0)
811 #ifdef HAVE_SSL
812 # define _ifs(X,Y) __if(X, Y, urlp->url_needs_tls = TRU1)
813 #else
814 # define _ifs(X,Y) goto jeproto;
815 #endif
816
817 switch (cproto) {
818 case CPROTO_SMTP:
819 #ifdef HAVE_SMTP
820 _if ("smtp", 25)
821 _if ("submission", 587)
822 _ifs ("smtps", 465)
823 _protox("smtp", 25);
824 break;
825 #else
826 goto jeproto;
827 #endif
828 case CPROTO_POP3:
829 #ifdef HAVE_POP3
830 _if ("pop3", 110)
831 _ifs ("pop3s", 995)
832 _protox("pop3", 110);
833 break;
834 #else
835 goto jeproto;
836 #endif
837 #if 0
838 case CPROTO_IMAP:
839 _if ("imap", 143)
840 _ifs ("imaps", 993)
841 _protox("imap", 143);
842 break;
843 goto jeproto;
844 #endif
845 }
846
847 #undef _ifs
848 #undef _if
849 #undef __if
850 #undef _protox
851
852 if (strstr(data, "://") != NULL) {
853 #if !defined __ALLPROTO || !defined HAVE_SSL
854 jeproto:
855 #endif
856 n_err(_("URL proto:// prefix invalid: %s\n"), urlp->url_input);
857 goto jleave;
858 }
859 #ifdef __ANYPROTO
860
861 /* User and password, I */
862 juser:
863 if ((cp = _url_last_at_before_slash(data)) != NULL) {
864 size_t l;
865 char const *urlpe, *d;
866 char *ub;
867
868 l = PTR2SIZE(cp - data);
869 ub = ac_alloc(l +1);
870 d = data;
871 urlp->url_had_user = TRU1;
872 data = &cp[1];
873
874 /* And also have a password? */
875 if((cp = memchr(d, ':', l)) != NULL){
876 size_t i = PTR2SIZE(cp - d);
877
878 l -= i + 1;
879 memcpy(ub, cp + 1, l);
880 ub[l] = '\0';
881
882 if((urlp->url_pass.s = urlxdec(ub)) == NULL)
883 goto jurlp_err;
884 urlp->url_pass.l = strlen(urlp->url_pass.s);
885 if((urlpe = urlxenc(urlp->url_pass.s, FAL0)) == NULL)
886 goto jurlp_err;
887 if(strcmp(ub, urlpe))
888 goto jurlp_err;
889 l = i;
890 }
891
892 memcpy(ub, d, l);
893 ub[l] = '\0';
894 if((urlp->url_user.s = urlxdec(ub)) == NULL)
895 goto jurlp_err;
896 urlp->url_user.l = strlen(urlp->url_user.s);
897 if((urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0)) == NULL)
898 goto jurlp_err;
899 urlp->url_user_enc.l = strlen(urlp->url_user_enc.s);
900
901 if(urlp->url_user_enc.l != l || memcmp(urlp->url_user_enc.s, ub, l)){
902 jurlp_err:
903 n_err(_("String is not properly URL percent encoded: %s\n"), ub);
904 d = NULL;
905 }
906
907 ac_free(ub);
908 if(d == NULL)
909 goto jleave;
910 }
911
912 /* Servername and port -- and possible path suffix */
913 if ((cp = strchr(data, ':')) != NULL) { /* TODO URL parse, IPv6 support */
914 char *eptr;
915 long l;
916
917 urlp->url_port = x = savestr(x = &cp[1]);
918 if ((x = strchr(x, '/')) != NULL) {
919 *x = '\0';
920 while(*++x == '/')
921 ;
922 }
923 l = strtol(urlp->url_port, &eptr, 10);
924 if (*eptr != '\0' || l <= 0 || UICMP(32, l, >=, 0xFFFFu)) {
925 n_err(_("URL with invalid port number: %s\n"), urlp->url_input);
926 goto jleave;
927 }
928 urlp->url_portno = (ui16_t)l;
929 } else {
930 if ((x = strchr(data, '/')) != NULL) {
931 data = savestrbuf(data, PTR2SIZE(x - data));
932 while(*++x == '/')
933 ;
934 }
935 cp = n_UNCONST(data + strlen(data));
936 }
937
938 /* A (non-empty) path may only occur with IMAP */
939 if (x != NULL && *x != '\0') {
940 /* Take care not to count adjacent slashes for real, on either end */
941 char *x2;
942 size_t i;
943
944 for(x2 = savestrbuf(x, i = strlen(x)); i > 0; --i)
945 if(x2[i - 1] != '/')
946 break;
947 x2[i] = '\0';
948
949 if (i > 0) {
950 #if 0
951 if (cproto != CPROTO_IMAP) {
952 #endif
953 n_err(_("URL protocol doesn't support paths: \"%s\"\n"),
954 urlp->url_input);
955 goto jleave;
956 #if 0
957 }
958 urlp->url_path.l = i;
959 urlp->url_path.s = x2;
960 #endif
961 }
962 }
963
964 urlp->url_host.s = savestrbuf(data, urlp->url_host.l = PTR2SIZE(cp - data));
965 { size_t i;
966 for (cp = urlp->url_host.s, i = urlp->url_host.l; i != 0; ++cp, --i)
967 *cp = lowerconv(*cp);
968 }
969
970 /* .url_h_p: HOST:PORT */
971 { size_t i;
972 struct str *s = &urlp->url_h_p;
973
974 s->s = salloc(urlp->url_host.l + 1 + sizeof("65536")-1 +1);
975 memcpy(s->s, urlp->url_host.s, i = urlp->url_host.l);
976 if (urlp->url_port != NULL) {
977 size_t j = strlen(urlp->url_port);
978 s->s[i++] = ':';
979 memcpy(s->s + i, urlp->url_port, j);
980 i += j;
981 }
982 s->s[i] = '\0';
983 s->l = i;
984 }
985
986 /* User, II
987 * If there was no user in the URL, do we have *user-HOST* or *user*? */
988 if (!urlp->url_had_user) {
989 if ((urlp->url_user.s = xok_vlook(user, urlp, OXM_PLAIN | OXM_H_P))
990 == NULL) {
991 /* No, check whether .netrc lookup is desired */
992 # ifdef HAVE_NETRC
993 if (!ok_blook(v15_compat) ||
994 !xok_blook(netrc_lookup, urlp, OXM_PLAIN | OXM_H_P) ||
995 !_nrc_lookup(urlp, FAL0))
996 # endif
997 urlp->url_user.s = n_UNCONST(myname);
998 }
999
1000 urlp->url_user.l = strlen(urlp->url_user.s);
1001 urlp->url_user.s = savestrbuf(urlp->url_user.s, urlp->url_user.l);
1002 if((urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0)) == NULL){
1003 n_err(_("Cannot URL encode %s\n"), urlp->url_user.s);
1004 goto jleave;
1005 }
1006 urlp->url_user_enc.l = strlen(urlp->url_user_enc.s);
1007 }
1008
1009 /* And then there are a lot of prebuild string combinations TODO do lazy */
1010
1011 /* .url_u_h: .url_user@.url_host
1012 * For SMTP we apply ridiculously complicated *v15-compat* plus
1013 * *smtp-hostname* / *hostname* dependent rules */
1014 { struct str h, *s;
1015 size_t i;
1016
1017 if (cproto == CPROTO_SMTP && ok_blook(v15_compat) &&
1018 (cp = ok_vlook(smtp_hostname)) != NULL) {
1019 if (*cp == '\0')
1020 cp = nodename(1);
1021 h.s = savestrbuf(cp, h.l = strlen(cp));
1022 } else
1023 h = urlp->url_host;
1024
1025 s = &urlp->url_u_h;
1026 i = urlp->url_user.l;
1027
1028 s->s = salloc(i + 1 + h.l +1);
1029 if (i > 0) {
1030 memcpy(s->s, urlp->url_user.s, i);
1031 s->s[i++] = '@';
1032 }
1033 memcpy(s->s + i, h.s, h.l +1);
1034 i += h.l;
1035 s->l = i;
1036 }
1037
1038 /* .url_u_h_p: .url_user@.url_host[:.url_port] */
1039 { struct str *s = &urlp->url_u_h_p;
1040 size_t i = urlp->url_user.l;
1041
1042 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
1043 if (i > 0) {
1044 memcpy(s->s, urlp->url_user.s, i);
1045 s->s[i++] = '@';
1046 }
1047 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
1048 i += urlp->url_h_p.l;
1049 s->l = i;
1050 }
1051
1052 /* .url_eu_h_p: .url_user_enc@.url_host[:.url_port] */
1053 { struct str *s = &urlp->url_eu_h_p;
1054 size_t i = urlp->url_user_enc.l;
1055
1056 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
1057 if (i > 0) {
1058 memcpy(s->s, urlp->url_user_enc.s, i);
1059 s->s[i++] = '@';
1060 }
1061 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
1062 i += urlp->url_h_p.l;
1063 s->l = i;
1064 }
1065
1066 /* .url_p_u_h_p: .url_proto://.url_u_h_p */
1067 { size_t i;
1068 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_u_h_p.l) +1);
1069
1070 urlp->url_proto[urlp->url_proto_len] = ':';
1071 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_u_h_p.s,
1072 urlp->url_u_h_p.l +1);
1073 urlp->url_proto[urlp->url_proto_len] = '\0';
1074
1075 urlp->url_p_u_h_p = ud;
1076 }
1077
1078 /* .url_p_eu_h_p, .url_p_eu_h_p_p: .url_proto://.url_eu_h_p[/.url_path] */
1079 { size_t i;
1080 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_eu_h_p.l) +
1081 1 + urlp->url_path.l +1);
1082
1083 urlp->url_proto[urlp->url_proto_len] = ':';
1084 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_eu_h_p.s,
1085 urlp->url_eu_h_p.l +1);
1086 urlp->url_proto[urlp->url_proto_len] = '\0';
1087
1088 if (urlp->url_path.l == 0)
1089 urlp->url_p_eu_h_p = urlp->url_p_eu_h_p_p = ud;
1090 else {
1091 urlp->url_p_eu_h_p = savestrbuf(ud, i);
1092 urlp->url_p_eu_h_p_p = ud;
1093 ud += i;
1094 *ud++ = '/';
1095 memcpy(ud, urlp->url_path.s, urlp->url_path.l +1);
1096 }
1097 }
1098
1099 rv = TRU1;
1100 #endif /* __ANYPROTO */
1101 jleave:
1102 NYD_LEAVE;
1103 return rv;
1104 #undef __ANYPROTO
1105 #undef __ALLPROTO
1106 }
1107
1108 FL bool_t
1109 ccred_lookup_old(struct ccred *ccp, enum cproto cproto, char const *addr)
1110 {
1111 char const *pname, *pxstr, *authdef;
1112 size_t pxlen, addrlen, i;
1113 char *vbuf, *s;
1114 ui8_t authmask;
1115 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1116 ware = NONE;
1117 bool_t addr_is_nuser = FAL0; /* XXX v15.0 legacy! v15_compat */
1118 NYD_ENTER;
1119
1120 memset(ccp, 0, sizeof *ccp);
1121
1122 switch (cproto) {
1123 default:
1124 case CPROTO_SMTP:
1125 pname = "SMTP";
1126 pxstr = "smtp-auth";
1127 pxlen = sizeof("smtp-auth") -1;
1128 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1129 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1130 authdef = "none";
1131 addr_is_nuser = TRU1;
1132 break;
1133 case CPROTO_POP3:
1134 pname = "POP3";
1135 pxstr = "pop3-auth";
1136 pxlen = sizeof("pop3-auth") -1;
1137 authmask = AUTHTYPE_PLAIN;
1138 authdef = "plain";
1139 break;
1140 }
1141
1142 ccp->cc_cproto = cproto;
1143 addrlen = strlen(addr);
1144 vbuf = ac_alloc(pxlen + addrlen + sizeof("-password-")-1 +1);
1145 memcpy(vbuf, pxstr, pxlen);
1146
1147 /* Authentication type */
1148 vbuf[pxlen] = '-';
1149 memcpy(vbuf + pxlen + 1, addr, addrlen +1);
1150 if ((s = vok_vlook(vbuf)) == NULL) {
1151 vbuf[pxlen] = '\0';
1152 if ((s = vok_vlook(vbuf)) == NULL)
1153 s = n_UNCONST(authdef);
1154 }
1155
1156 if (!asccasecmp(s, "none")) {
1157 ccp->cc_auth = "NONE";
1158 ccp->cc_authtype = AUTHTYPE_NONE;
1159 /*ware = NONE;*/
1160 } else if (!asccasecmp(s, "plain")) {
1161 ccp->cc_auth = "PLAIN";
1162 ccp->cc_authtype = AUTHTYPE_PLAIN;
1163 ware = REQ_PASS | REQ_USER;
1164 } else if (!asccasecmp(s, "login")) {
1165 ccp->cc_auth = "LOGIN";
1166 ccp->cc_authtype = AUTHTYPE_LOGIN;
1167 ware = REQ_PASS | REQ_USER;
1168 } else if (!asccasecmp(s, "cram-md5")) {
1169 ccp->cc_auth = "CRAM-MD5";
1170 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1171 ware = REQ_PASS | REQ_USER;
1172 } else if (!asccasecmp(s, "gssapi")) {
1173 ccp->cc_auth = "GSS-API";
1174 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1175 ware = REQ_USER;
1176 } /* no else */
1177
1178 /* Verify method */
1179 if (!(ccp->cc_authtype & authmask)) {
1180 n_err(_("Unsupported %s authentication method: %s\n"), pname, s);
1181 ccp = NULL;
1182 goto jleave;
1183 }
1184 # ifndef HAVE_MD5
1185 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1186 n_err(_("No CRAM-MD5 support compiled in\n"));
1187 ccp = NULL;
1188 goto jleave;
1189 }
1190 # endif
1191 # ifndef HAVE_GSSAPI
1192 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1193 n_err(_("No GSS-API support compiled in\n"));
1194 ccp = NULL;
1195 goto jleave;
1196 }
1197 # endif
1198
1199 /* User name */
1200 if (!(ware & (WANT_USER | REQ_USER)))
1201 goto jpass;
1202
1203 if (!addr_is_nuser) {
1204 if ((s = _url_last_at_before_slash(addr)) != NULL) {
1205 char *cp;
1206
1207 cp = savestrbuf(addr, PTR2SIZE(s - addr));
1208
1209 if((ccp->cc_user.s = urlxdec(cp)) == NULL){
1210 n_err(_("String is not properly URL percent encoded: %s\n"), cp);
1211 ccp = NULL;
1212 goto jleave;
1213 }
1214 ccp->cc_user.l = strlen(ccp->cc_user.s);
1215 } else if (ware & REQ_USER)
1216 goto jgetuser;
1217 goto jpass;
1218 }
1219
1220 memcpy(vbuf + pxlen, "-user-", i = sizeof("-user-") -1);
1221 i += pxlen;
1222 memcpy(vbuf + i, addr, addrlen +1);
1223 if ((s = vok_vlook(vbuf)) == NULL) {
1224 vbuf[--i] = '\0';
1225 if ((s = vok_vlook(vbuf)) == NULL && (ware & REQ_USER)) {
1226 if ((s = getuser(NULL)) == NULL) {
1227 jgetuser: /* TODO v15.0: today we simply bail, but we should call getuser().
1228 * TODO even better: introduce "PROTO-user" and "PROTO-pass" and
1229 * TODO check that first, then! change control flow, grow vbuf */
1230 n_err(_("A user is necessary for %s authentication\n"), pname);
1231 ccp = NULL;
1232 goto jleave;
1233 }
1234 }
1235 }
1236 ccp->cc_user.l = strlen(ccp->cc_user.s = savestr(s));
1237
1238 /* Password */
1239 jpass:
1240 if (!(ware & (WANT_PASS | REQ_PASS)))
1241 goto jleave;
1242
1243 if (!addr_is_nuser) {
1244 memcpy(vbuf, "password-", i = sizeof("password-") -1);
1245 } else {
1246 memcpy(vbuf + pxlen, "-password-", i = sizeof("-password-") -1);
1247 i += pxlen;
1248 }
1249 memcpy(vbuf + i, addr, addrlen +1);
1250 if ((s = vok_vlook(vbuf)) == NULL) {
1251 vbuf[--i] = '\0';
1252 if ((!addr_is_nuser || (s = vok_vlook(vbuf)) == NULL) &&
1253 (ware & REQ_PASS)) {
1254 if ((s = getpassword(NULL)) == NULL) {
1255 n_err(_("A password is necessary for %s authentication\n"),
1256 pname);
1257 ccp = NULL;
1258 goto jleave;
1259 }
1260 }
1261 }
1262 if (s != NULL)
1263 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1264
1265 jleave:
1266 ac_free(vbuf);
1267 if (ccp != NULL && (options & OPT_D_VV))
1268 n_err(_("Credentials: host %s, user %s, pass %s\n"),
1269 addr, (ccp->cc_user.s != NULL ? ccp->cc_user.s : n_empty),
1270 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : n_empty));
1271 NYD_LEAVE;
1272 return (ccp != NULL);
1273 }
1274
1275 FL bool_t
1276 ccred_lookup(struct ccred *ccp, struct url *urlp)
1277 {
1278 char const *pstr, *authdef;
1279 char *s;
1280 enum okeys authokey;
1281 ui8_t authmask;
1282 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1283 ware = NONE;
1284 NYD_ENTER;
1285
1286 memset(ccp, 0, sizeof *ccp);
1287 ccp->cc_user = urlp->url_user;
1288
1289 switch ((ccp->cc_cproto = urlp->url_cproto)) {
1290 default:
1291 case CPROTO_SMTP:
1292 pstr = "smtp";
1293 authokey = ok_v_smtp_auth;
1294 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1295 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1296 authdef = "plain";
1297 break;
1298 case CPROTO_POP3:
1299 pstr = "pop3";
1300 authokey = ok_v_pop3_auth;
1301 authmask = AUTHTYPE_PLAIN;
1302 authdef = "plain";
1303 break;
1304 }
1305
1306 /* Authentication type */
1307 if ((s = xok_VLOOK(authokey, urlp, OXM_ALL)) == NULL)
1308 s = n_UNCONST(authdef);
1309
1310 if (!asccasecmp(s, "none")) {
1311 ccp->cc_auth = "NONE";
1312 ccp->cc_authtype = AUTHTYPE_NONE;
1313 /*ware = NONE;*/
1314 } else if (!asccasecmp(s, "plain")) {
1315 ccp->cc_auth = "PLAIN";
1316 ccp->cc_authtype = AUTHTYPE_PLAIN;
1317 ware = REQ_PASS | REQ_USER;
1318 } else if (!asccasecmp(s, "login")) {
1319 ccp->cc_auth = "LOGIN";
1320 ccp->cc_authtype = AUTHTYPE_LOGIN;
1321 ware = REQ_PASS | REQ_USER;
1322 } else if (!asccasecmp(s, "cram-md5")) {
1323 ccp->cc_auth = "CRAM-MD5";
1324 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1325 ware = REQ_PASS | REQ_USER;
1326 } else if (!asccasecmp(s, "gssapi")) {
1327 ccp->cc_auth = "GSS-API";
1328 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1329 ware = REQ_USER;
1330 } /* no else */
1331
1332 /* Verify method */
1333 if (!(ccp->cc_authtype & authmask)) {
1334 n_err(_("Unsupported %s authentication method: %s\n"), pstr, s);
1335 ccp = NULL;
1336 goto jleave;
1337 }
1338 # ifndef HAVE_MD5
1339 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1340 n_err(_("No CRAM-MD5 support compiled in\n"));
1341 ccp = NULL;
1342 goto jleave;
1343 }
1344 # endif
1345 # ifndef HAVE_GSSAPI
1346 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1347 n_err(_("No GSS-API support compiled in\n"));
1348 ccp = NULL;
1349 goto jleave;
1350 }
1351 # endif
1352
1353 /* Password */
1354 ccp->cc_pass = urlp->url_pass;
1355 if (ccp->cc_pass.s != NULL)
1356 goto jleave;
1357
1358 if ((s = xok_vlook(password, urlp, OXM_ALL)) != NULL)
1359 goto js2pass;
1360 # ifdef HAVE_AGENT /* TODO v15-compat obsolete */
1361 if ((s = xok_vlook(agent_shell_lookup, urlp, OXM_ALL)) != NULL) {
1362 OBSOLETE(_("*agent-shell-lookup* will vanish. Please use encrypted "
1363 "~/.netrc (via *netrc-pipe*), or simply `source' an encrypted file"));
1364 if (!_agent_shell_lookup(urlp, s)) {
1365 ccp = NULL;
1366 goto jleave;
1367 } else if (urlp->url_pass.s != NULL) {
1368 ccp->cc_pass = urlp->url_pass;
1369 goto jleave;
1370 }
1371 }
1372 # endif
1373 # ifdef HAVE_NETRC
1374 if (xok_blook(netrc_lookup, urlp, OXM_ALL) && _nrc_lookup(urlp, TRU1)) {
1375 ccp->cc_pass = urlp->url_pass;
1376 goto jleave;
1377 }
1378 # endif
1379 if (ware & REQ_PASS) {
1380 if ((s = getpassword(NULL)) != NULL)
1381 js2pass:
1382 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1383 else {
1384 n_err(_("A password is necessary for %s authentication\n"), pstr);
1385 ccp = NULL;
1386 }
1387 }
1388
1389 jleave:
1390 if (ccp != NULL && (options & OPT_D_VV))
1391 n_err(_("Credentials: host %s, user %s, pass %s\n"),
1392 urlp->url_h_p.s, (ccp->cc_user.s != NULL ? ccp->cc_user.s : n_empty),
1393 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : n_empty));
1394 NYD_LEAVE;
1395 return (ccp != NULL);
1396 }
1397 #endif /* HAVE_SOCKETS */
1398
1399 #ifdef HAVE_NETRC
1400 FL int
1401 c_netrc(void *v)
1402 {
1403 char **argv = v;
1404 struct nrc_node *nrc;
1405 bool_t load_only;
1406 NYD_ENTER;
1407
1408 load_only = FAL0;
1409 if (*argv == NULL)
1410 goto jlist;
1411 if (argv[1] != NULL)
1412 goto jerr;
1413 if (!asccasecmp(*argv, "show"))
1414 goto jlist;
1415 load_only = TRU1;
1416 if (!asccasecmp(*argv, "load"))
1417 goto jlist;
1418 if (!asccasecmp(*argv, "clear"))
1419 goto jclear;
1420 jerr:
1421 n_err(_("Synopsis: netrc: (<show> or) <clear> the .netrc cache\n"));
1422 v = NULL;
1423 jleave:
1424 NYD_LEAVE;
1425 return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
1426
1427 jlist: {
1428 FILE *fp;
1429 size_t l;
1430
1431 if (_nrc_list == NULL)
1432 _nrc_init();
1433 if (_nrc_list == NRC_NODE_ERR) {
1434 n_err(_("Interpolate what file?\n"));
1435 v = NULL;
1436 goto jleave;
1437 }
1438 if (load_only)
1439 goto jleave;
1440
1441 if ((fp = Ftmp(NULL, "netrc", OF_RDWR | OF_UNLINK | OF_REGISTER)) == NULL) {
1442 n_perr(_("tmpfile"), 0);
1443 v = NULL;
1444 goto jleave;
1445 }
1446
1447 for (l = 0, nrc = _nrc_list; nrc != NULL; ++l, nrc = nrc->nrc_next) {
1448 fprintf(fp, _("machine %s "), nrc->nrc_dat); /* XXX quote? */
1449 if (nrc->nrc_ulen > 0)
1450 fprintf(fp, _("login \"%s\" "),
1451 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1));
1452 if (nrc->nrc_plen > 0)
1453 fprintf(fp, _("password \"%s\"\n"),
1454 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1 + nrc->nrc_ulen +1));
1455 else
1456 putc('\n', fp);
1457 }
1458
1459 page_or_print(fp, l);
1460 Fclose(fp);
1461 }
1462 goto jleave;
1463
1464 jclear:
1465 if (_nrc_list == NRC_NODE_ERR)
1466 _nrc_list = NULL;
1467 while ((nrc = _nrc_list) != NULL) {
1468 _nrc_list = nrc->nrc_next;
1469 free(nrc);
1470 }
1471 goto jleave;
1472 }
1473 #endif /* HAVE_NETRC */
1474
1475 #ifdef HAVE_MD5
1476 FL char *
1477 md5tohex(char hex[MD5TOHEX_SIZE], void const *vp)
1478 {
1479 char const *cp = vp;
1480 size_t i, j;
1481 NYD_ENTER;
1482
1483 for (i = 0; i < MD5TOHEX_SIZE / 2; ++i) {
1484 j = i << 1;
1485 # define __hex(n) ((n) > 9 ? (n) - 10 + 'a' : (n) + '0')
1486 hex[j] = __hex((cp[i] & 0xF0) >> 4);
1487 hex[++j] = __hex(cp[i] & 0x0F);
1488 # undef __hex
1489 }
1490 NYD_LEAVE;
1491 return hex;
1492 }
1493
1494 FL char *
1495 cram_md5_string(struct str const *user, struct str const *pass,
1496 char const *b64)
1497 {
1498 struct str in, out;
1499 char digest[16], *cp;
1500 NYD_ENTER;
1501
1502 out.s = NULL;
1503 if(user->l >= UIZ_MAX - 1 - MD5TOHEX_SIZE - 1)
1504 goto jleave;
1505 if(pass->l >= INT_MAX)
1506 goto jleave;
1507
1508 in.s = n_UNCONST(b64);
1509 in.l = strlen(in.s);
1510 if(!b64_decode(&out, &in))
1511 goto jleave;
1512 if(out.l >= INT_MAX){
1513 free(out.s);
1514 out.s = NULL;
1515 goto jleave;
1516 }
1517
1518 hmac_md5((uc_i*)out.s, out.l, (uc_i*)pass->s, pass->l, digest);
1519 free(out.s);
1520 cp = md5tohex(salloc(MD5TOHEX_SIZE +1), digest);
1521
1522 in.l = user->l + MD5TOHEX_SIZE +1;
1523 in.s = ac_alloc(user->l + 1 + MD5TOHEX_SIZE +1);
1524 memcpy(in.s, user->s, user->l);
1525 in.s[user->l] = ' ';
1526 memcpy(&in.s[user->l + 1], cp, MD5TOHEX_SIZE);
1527 if(b64_encode(&out, &in, B64_SALLOC | B64_CRLF) == NULL)
1528 out.s = NULL;
1529 ac_free(in.s);
1530 jleave:
1531 NYD_LEAVE;
1532 return out.s;
1533 }
1534
1535 FL void
1536 hmac_md5(unsigned char *text, int text_len, unsigned char *key, int key_len,
1537 void *digest)
1538 {
1539 /*
1540 * This code is taken from
1541 *
1542 * Network Working Group H. Krawczyk
1543 * Request for Comments: 2104 IBM
1544 * Category: Informational M. Bellare
1545 * UCSD
1546 * R. Canetti
1547 * IBM
1548 * February 1997
1549 *
1550 *
1551 * HMAC: Keyed-Hashing for Message Authentication
1552 */
1553 md5_ctx context;
1554 unsigned char k_ipad[65]; /* inner padding - key XORd with ipad */
1555 unsigned char k_opad[65]; /* outer padding - key XORd with opad */
1556 unsigned char tk[16];
1557 int i;
1558 NYD_ENTER;
1559
1560 /* if key is longer than 64 bytes reset it to key=MD5(key) */
1561 if (key_len > 64) {
1562 md5_ctx tctx;
1563
1564 md5_init(&tctx);
1565 md5_update(&tctx, key, key_len);
1566 md5_final(tk, &tctx);
1567
1568 key = tk;
1569 key_len = 16;
1570 }
1571
1572 /* the HMAC_MD5 transform looks like:
1573 *
1574 * MD5(K XOR opad, MD5(K XOR ipad, text))
1575 *
1576 * where K is an n byte key
1577 * ipad is the byte 0x36 repeated 64 times
1578 * opad is the byte 0x5c repeated 64 times
1579 * and text is the data being protected */
1580
1581 /* start out by storing key in pads */
1582 memset(k_ipad, 0, sizeof k_ipad);
1583 memset(k_opad, 0, sizeof k_opad);
1584 memcpy(k_ipad, key, key_len);
1585 memcpy(k_opad, key, key_len);
1586
1587 /* XOR key with ipad and opad values */
1588 for (i=0; i<64; i++) {
1589 k_ipad[i] ^= 0x36;
1590 k_opad[i] ^= 0x5c;
1591 }
1592
1593 /* perform inner MD5 */
1594 md5_init(&context); /* init context for 1st pass */
1595 md5_update(&context, k_ipad, 64); /* start with inner pad */
1596 md5_update(&context, text, text_len); /* then text of datagram */
1597 md5_final(digest, &context); /* finish up 1st pass */
1598
1599 /* perform outer MD5 */
1600 md5_init(&context); /* init context for 2nd pass */
1601 md5_update(&context, k_opad, 64); /* start with outer pad */
1602 md5_update(&context, digest, 16); /* then results of 1st hash */
1603 md5_final(digest, &context); /* finish up 2nd pass */
1604 NYD_LEAVE;
1605 }
1606 #endif /* HAVE_MD5 */
1607
1608 /* s-it-mode */
A mail processing system intended to provide the functionality of the POSIX mailx(1) command