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mk-release.inc: auto-append checksum file to announcement mail
[s-mailx.git] / urlcrecry.c
blob76d9b9910af4764e8cd7c9f88b4406bbd7af7efe
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[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 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 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 = file_expand(ok_vlook(NETRC))) == NULL)
144 goto j_leave;
145
146 if ((fi = Fopen(netrc_load, "r")) == NULL) {
147 n_err(_("Cannot open %s\n"), n_shexp_quote_cp(netrc_load, FAL0));
148 goto j_leave;
149 }
150
151 /* Be simple and apply rigid (permission) check(s) */
152 if (fstat(fileno(fi), &sb) == -1 || !S_ISREG(sb.st_mode) ||
153 (sb.st_mode & (S_IRWXG | S_IRWXO))) {
154 n_err(_("Not a regular file, or accessible by non-user: %s\n"),
155 n_shexp_quote_cp(netrc_load, FAL0));
156 goto jleave;
157 }
158 }
159
160 seen_default = FAL0;
161 nl_last = TRU1;
162 jnext:
163 switch((t = __nrc_token(fi, buffer, &nl_last))) {
164 case NRC_NONE:
165 break;
166 default: /* Doesn't happen (but on error?), keep CC happy */
167 case NRC_DEFAULT:
168 jdef:
169 /* We ignore the default entry (require an exact host match), and we also
170 * ignore anything after such an entry (faulty syntax) */
171 seen_default = TRU1;
172 /* FALLTHRU */
173 case NRC_MACHINE:
174 jm_h:
175 /* Normalize HOST to lowercase */
176 *host = '\0';
177 if (!seen_default && (t = __nrc_token(fi, host, &nl_last)) != NRC_INPUT)
178 goto jerr;
179 else {
180 char *cp;
181 for (cp = host; *cp != '\0'; ++cp)
182 *cp = lowerconv(*cp);
183 }
184
185 *user = *pass = '\0';
186 while ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_NONE &&
187 t != NRC_MACHINE && t != NRC_DEFAULT) {
188 switch(t) {
189 case NRC_LOGIN:
190 if ((t = __nrc_token(fi, user, &nl_last)) != NRC_INPUT)
191 goto jerr;
192 break;
193 case NRC_PASSWORD:
194 if ((t = __nrc_token(fi, pass, &nl_last)) != NRC_INPUT)
195 goto jerr;
196 break;
197 case NRC_ACCOUNT:
198 if ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_INPUT)
199 goto jerr;
200 break;
201 case NRC_MACDEF:
202 if ((t = __nrc_token(fi, buffer, &nl_last)) != NRC_INPUT)
203 goto jerr;
204 else {
205 int i = 0, c;
206 while ((c = getc(fi)) != EOF)
207 if (c == '\n') { /* xxx */
208 /* Don't care about comments here, since we parse until
209 * we've seen two successive newline characters */
210 if (i)
211 break;
212 i = 1;
213 } else
214 i = 0;
215 }
216 break;
217 default:
218 case NRC_ERROR:
219 goto jerr;
220 }
221 }
222
223 if (!seen_default && (*user != '\0' || *pass != '\0')) {
224 size_t hl = strlen(host), ul = strlen(user), pl = strlen(pass);
225 struct nrc_node *nx = smalloc(sizeof(*nx) -
226 VFIELD_SIZEOF(struct nrc_node, nrc_dat) + hl +1 + ul +1 + pl +1);
227
228 if (nhead != NULL)
229 ntail->nrc_next = nx;
230 else
231 nhead = nx;
232 ntail = nx;
233 nx->nrc_next = NULL;
234 nx->nrc_mlen = hl;
235 nx->nrc_ulen = ul;
236 nx->nrc_plen = pl;
237 memcpy(nx->nrc_dat, host, ++hl);
238 memcpy(nx->nrc_dat + hl, user, ++ul);
239 memcpy(nx->nrc_dat + hl + ul, pass, ++pl);
240 }
241 if (t == NRC_MACHINE)
242 goto jm_h;
243 if (t == NRC_DEFAULT)
244 goto jdef;
245 if (t != NRC_NONE)
246 goto jnext;
247 break;
248 case NRC_ERROR:
249 jerr:
250 if (options & OPT_D_V)
251 n_err(_("Errors occurred while parsing %s\n"),
252 n_shexp_quote_cp(netrc_load, FAL0));
253 assert(nrc == NRC_NODE_ERR);
254 goto jleave;
255 }
256
257 if (nhead != NULL)
258 nrc = nhead;
259 n_sigman_cleanup_ping(&sm);
260 jleave:
261 if (fi != NULL) {
262 if (ispipe)
263 Pclose(fi, TRU1);
264 else
265 Fclose(fi);
266 }
267 if (nrc == NRC_NODE_ERR)
268 while (nhead != NULL) {
269 ntail = nhead;
270 nhead = nhead->nrc_next;
271 free(ntail);
272 }
273 j_leave:
274 _nrc_list = nrc;
275 NYD_LEAVE;
276 n_sigman_leave(&sm, n_SIGMAN_VIPSIGS_NTTYOUT);
277 }
278
279 static enum nrc_token
280 __nrc_token(FILE *fi, char buffer[NRC_TOKEN_MAXLEN], bool_t *nl_last)
281 {
282 int c;
283 char *cp;
284 enum nrc_token rv;
285 NYD2_ENTER;
286
287 rv = NRC_NONE;
288 for (;;) {
289 bool_t seen_nl;
290
291 c = EOF;
292 if (feof(fi) || ferror(fi))
293 goto jleave;
294
295 for (seen_nl = *nl_last; (c = getc(fi)) != EOF && whitechar(c);)
296 seen_nl |= (c == '\n');
297
298 if (c == EOF)
299 goto jleave;
300 /* fetchmail and derived parsers support comments */
301 if ((*nl_last = seen_nl) && c == '#') {
302 while ((c = getc(fi)) != EOF && c != '\n')
303 ;
304 continue;
305 }
306 break;
307 }
308
309 cp = buffer;
310 /* Is it a quoted token? At least IBM syntax also supports ' quotes */
311 if (c == '"' || c == '\'') {
312 int quotec = c;
313
314 /* Not requiring the closing QM is (Net)BSD syntax */
315 while ((c = getc(fi)) != EOF && c != quotec) {
316 /* Backslash escaping the next character is (Net)BSD syntax */
317 if (c == '\\')
318 if ((c = getc(fi)) == EOF)
319 break;
320 *cp++ = c;
321 if (PTRCMP(cp, ==, buffer + NRC_TOKEN_MAXLEN)) {
322 rv = NRC_ERROR;
323 goto jleave;
324 }
325 }
326 } else {
327 *cp++ = c;
328 while ((c = getc(fi)) != EOF && !whitechar(c)) {
329 /* Backslash escaping the next character is (Net)BSD syntax */
330 if (c == '\\' && (c = getc(fi)) == EOF)
331 break;
332 *cp++ = c;
333 if (PTRCMP(cp, ==, buffer + NRC_TOKEN_MAXLEN)) {
334 rv = NRC_ERROR;
335 goto jleave;
336 }
337 }
338 *nl_last = (c == '\n');
339 }
340 *cp = '\0';
341
342 if (*buffer == '\0')
343 do {/*rv = NRC_NONE*/} while (0);
344 else if (!strcmp(buffer, "default"))
345 rv = NRC_DEFAULT;
346 else if (!strcmp(buffer, "login"))
347 rv = NRC_LOGIN;
348 else if (!strcmp(buffer, "password") || !strcmp(buffer, "passwd"))
349 rv = NRC_PASSWORD;
350 else if (!strcmp(buffer, "account"))
351 rv = NRC_ACCOUNT;
352 else if (!strcmp(buffer, "macdef"))
353 rv = NRC_MACDEF;
354 else if (!strcmp(buffer, "machine"))
355 rv = NRC_MACHINE;
356 else
357 rv = NRC_INPUT;
358 jleave:
359 if (c == EOF && !feof(fi))
360 rv = NRC_ERROR;
361 NYD2_LEAVE;
362 return rv;
363 }
364
365 static bool_t
366 _nrc_lookup(struct url *urlp, bool_t only_pass)
367 {
368 struct nrc_node *nrc, *nrc_wild, *nrc_exact;
369 bool_t rv = FAL0;
370 NYD_ENTER;
371
372 assert(!only_pass || urlp->url_user.s != NULL);
373 assert(only_pass || urlp->url_user.s == NULL);
374
375 if (_nrc_list == NULL)
376 _nrc_init();
377 if (_nrc_list == NRC_NODE_ERR)
378 goto jleave;
379
380 nrc_wild = nrc_exact = NULL;
381 for (nrc = _nrc_list; nrc != NULL; nrc = nrc->nrc_next)
382 switch (__nrc_host_match(nrc, urlp)) {
383 case 1:
384 nrc->nrc_result = nrc_exact;
385 nrc_exact = nrc;
386 continue;
387 case -1:
388 nrc->nrc_result = nrc_wild;
389 nrc_wild = nrc;
390 /* FALLTHRU */
391 case 0:
392 continue;
393 }
394
395 if (!only_pass && urlp->url_user.s == NULL) {
396 /* Must be an unambiguous entry of its kind */
397 if (nrc_exact != NULL && nrc_exact->nrc_result != NULL)
398 goto jleave;
399 if (__nrc_find_user(urlp, nrc_exact))
400 goto j_user;
401
402 if (nrc_wild != NULL && nrc_wild->nrc_result != NULL)
403 goto jleave;
404 if (!__nrc_find_user(urlp, nrc_wild))
405 goto jleave;
406 j_user:
407 ;
408 }
409
410 if (__nrc_find_pass(urlp, TRU1, nrc_exact) ||
411 __nrc_find_pass(urlp, TRU1, nrc_wild) ||
412 /* Do not try to find a password without exact user match unless we've
413 * been called during credential lookup, a.k.a. the second time */
414 !only_pass ||
415 __nrc_find_pass(urlp, FAL0, nrc_exact) ||
416 __nrc_find_pass(urlp, FAL0, nrc_wild))
417 rv = TRU1;
418 jleave:
419 NYD_LEAVE;
420 return rv;
421 }
422
423 static int
424 __nrc_host_match(struct nrc_node const *nrc, struct url const *urlp)
425 {
426 char const *d2, *d1;
427 size_t l2, l1;
428 int rv = 0;
429 NYD2_ENTER;
430
431 /* Find a matching machine -- entries are all lowercase normalized */
432 if (nrc->nrc_mlen == urlp->url_host.l) {
433 if (LIKELY(!memcmp(nrc->nrc_dat, urlp->url_host.s, urlp->url_host.l)))
434 rv = 1;
435 goto jleave;
436 }
437
438 /* Cannot be an exact match, but maybe the .netrc machine starts with
439 * a "*." glob, which we recognize as an extension, meaning "skip
440 * a single subdomain, then match the rest" */
441 d1 = nrc->nrc_dat + 2;
442 l1 = nrc->nrc_mlen;
443 if (l1 <= 2 || d1[-1] != '.' || d1[-2] != '*')
444 goto jleave;
445 l1 -= 2;
446
447 /* Brute skipping over one subdomain, no RFC 1035 or RFC 1122 checks;
448 * in fact this even succeeds for ".host.com", but - why care, here? */
449 d2 = urlp->url_host.s;
450 l2 = urlp->url_host.l;
451 while (l2 > 0) {
452 --l2;
453 if (*d2++ == '.')
454 break;
455 }
456
457 if (l2 == l1 && !memcmp(d1, d2, l1))
458 /* This matches, but we won't use it directly but watch out for an
459 * exact match first! */
460 rv = -1;
461 jleave:
462 NYD2_LEAVE;
463 return rv;
464 }
465
466 static bool_t
467 __nrc_find_user(struct url *urlp, struct nrc_node const *nrc)
468 {
469 NYD2_ENTER;
470
471 for (; nrc != NULL; nrc = nrc->nrc_result)
472 if (nrc->nrc_ulen > 0) {
473 /* Fake it was part of URL otherwise XXX */
474 urlp->url_had_user = TRU1;
475 /* That buffer will be duplicated by url_parse() in this case! */
476 urlp->url_user.s = UNCONST(nrc->nrc_dat + nrc->nrc_mlen +1);
477 urlp->url_user.l = nrc->nrc_ulen;
478 break;
479 }
480
481 NYD2_LEAVE;
482 return (nrc != NULL);
483 }
484
485 static bool_t
486 __nrc_find_pass(struct url *urlp, bool_t user_match, struct nrc_node const *nrc)
487 {
488 NYD2_ENTER;
489
490 for (; nrc != NULL; nrc = nrc->nrc_result) {
491 bool_t um = (nrc->nrc_ulen == urlp->url_user.l &&
492 !memcmp(nrc->nrc_dat + nrc->nrc_mlen +1, urlp->url_user.s,
493 urlp->url_user.l));
494
495 if (user_match) {
496 if (!um)
497 continue;
498 } else if (!um && nrc->nrc_ulen > 0)
499 continue;
500 if (nrc->nrc_plen == 0)
501 continue;
502
503 /* We are responsible for duplicating this buffer! */
504 urlp->url_pass.s = savestrbuf(nrc->nrc_dat + nrc->nrc_mlen +1 +
505 nrc->nrc_ulen + 1, (urlp->url_pass.l = nrc->nrc_plen));
506 break;
507 }
508
509 NYD2_LEAVE;
510 return (nrc != NULL);
511 }
512 #endif /* HAVE_NETRC */
513
514 #ifdef HAVE_AGENT
515 static bool_t
516 _agent_shell_lookup(struct url *urlp, char const *comm) /* TODO v15-compat */
517 {
518 char buf[128];
519 char const *env_addon[8];
520 struct str s;
521 FILE *pbuf;
522 union {char const *cp; int c; sighandler_type sht;} u;
523 size_t cl, l;
524 bool_t rv = FAL0;
525 NYD2_ENTER;
526
527 env_addon[0] = str_concat_csvl(&s, AGENT_USER, "=", urlp->url_user.s,
528 NULL)->s;
529 env_addon[1] = str_concat_csvl(&s, AGENT_USER_ENC, "=", urlp->url_user_enc.s,
530 NULL)->s;
531 env_addon[2] = str_concat_csvl(&s, AGENT_HOST, "=", urlp->url_host.s,
532 NULL)->s;
533 env_addon[3] = str_concat_csvl(&s, AGENT_HOST_PORT, "=", urlp->url_h_p.s,
534 NULL)->s;
535 u.cp = ok_vlook(TMPDIR);
536 env_addon[4] = str_concat_csvl(&s, NAILENV_TMPDIR, "=", u.cp, NULL)->s;
537 env_addon[5] = str_concat_csvl(&s, "TMPDIR", "=", u.cp, NULL)->s;
538
539 env_addon[6] = 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 = UNCONST(""), 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 SALLOC_DEBUG_ARGS)
579 {
580 char *n, *np, c1;
581 NYD2_ENTER;
582
583 np = n = (salloc)(strlen(cp) * 3 +1 SALLOC_DEBUG_ARGSCALL);
584
585 for (; (c1 = *cp) != '\0'; ++cp) {
586 /* (RFC 1738) RFC 3986, 2.3 Unreserved Characters:
587 * ALPHA / DIGIT / "-" / "." / "_" / "~"
588 * However add a special is[file]path mode for file-system friendliness */
589 if (alnumchar(c1) || c1 == '_')
590 *np++ = c1;
591 else if (!ispath) {
592 if (c1 != '-' && c1 != '.' && c1 != '~')
593 goto jesc;
594 *np++ = c1;
595 } else if (PTRCMP(np, >, n) && (*cp == '-' || *cp == '.')) /* XXX imap */
596 *np++ = c1;
597 else {
598 jesc:
599 np[0] = '%';
600 n_c_to_hex_base16(np + 1, c1);
601 np += 3;
602 }
603 }
604 *np = '\0';
605 NYD2_LEAVE;
606 return n;
607 }
608
609 FL char *
610 (urlxdec)(char const *cp SALLOC_DEBUG_ARGS)
611 {
612 char *n, *np;
613 si32_t c;
614 NYD2_ENTER;
615
616 np = n = (salloc)(strlen(cp) +1 SALLOC_DEBUG_ARGSCALL);
617
618 while ((c = (uc_i)*cp++) != '\0') {
619 if (c == '%' && cp[0] != '\0' && cp[1] != '\0') {
620 si32_t o = c;
621 if (LIKELY((c = n_c_from_hex_base16(cp)) >= '\0'))
622 cp += 2;
623 else
624 c = o;
625 }
626 *np++ = (char)c;
627 }
628 *np = '\0';
629 NYD2_LEAVE;
630 return n;
631 }
632
633 FL char *
634 url_mailto_to_address(char const *mailtop){ /* TODO hack! RFC 6068; factory? */
635 size_t i;
636 char *rv;
637 char const *mailtop_orig;
638 NYD_ENTER;
639
640 if(!is_prefix("mailto:", mailtop_orig = mailtop)){
641 rv = NULL;
642 goto jleave;
643 }
644 mailtop += sizeof("mailto:") -1;
645
646 /* TODO This is all intermediate, and for now just enough to understand
647 * TODO a little bit of a little more advanced List-Post: headers. */
648 /* Strip any hfield additions, keep only to addr-spec's */
649 if((rv = strchr(mailtop, '?')) != NULL)
650 rv = savestrbuf(mailtop, i = PTR2SIZE(rv - mailtop));
651 else
652 rv = savestrbuf(mailtop, i = strlen(mailtop));
653
654 i = strlen(rv);
655
656 /* Simply perform percent-decoding if there is a percent % */
657 if(memchr(rv, '%', i) != NULL){
658 char *rv_base;
659 bool_t err;
660
661 for(err = FAL0, mailtop = rv_base = rv; i > 0;){
662 char c;
663
664 if((c = *mailtop++) == '%'){
665 si32_t cc;
666
667 if(i < 3 || (cc = n_c_from_hex_base16(mailtop)) < 0){
668 if(!err && (err = TRU1, options & OPT_D_V))
669 n_err(_("Invalid RFC 6068 'mailto' URL: %s\n"),
670 n_shexp_quote_cp(mailtop_orig, FAL0));
671 goto jhex_putc;
672 }
673 *rv++ = (char)cc;
674 mailtop += 2;
675 i -= 3;
676 }else{
677 jhex_putc:
678 *rv++ = c;
679 --i;
680 }
681 }
682 *rv = '\0';
683 rv = rv_base;
684 }
685 jleave:
686 NYD_LEAVE;
687 return rv;
688 }
689
690 FL char const *
691 n_servbyname(char const *proto, ui16_t *irv_or_null){
692 static struct{
693 char const name[14];
694 char const port[8];
695 ui16_t portno;
696 } const tbl[] = {
697 { "smtp", "25", 25},
698 { "submission", "587", 587},
699 { "smtps", "465", 465},
700 { "pop3", "110", 110},
701 { "pop3s", "995", 995},
702 { "imap", "143", 143},
703 { "imaps", "993", 993},
704 { "file", "", 0}
705 };
706 char const *rv;
707 size_t l, i;
708 NYD2_ENTER;
709
710 for(rv = proto; *rv != '\0'; ++rv)
711 if(*rv == ':')
712 break;
713 l = PTR2SIZE(rv - proto);
714
715 for(rv = NULL, i = 0; i < NELEM(tbl); ++i)
716 if(!ascncasecmp(tbl[i].name, proto, l)){
717 rv = tbl[i].port;
718 if(irv_or_null != NULL)
719 *irv_or_null = tbl[i].portno;
720 break;
721 }
722 NYD2_LEAVE;
723 return rv;
724 }
725
726 #ifdef HAVE_SOCKETS /* Note: not indented for that -- later: file:// etc.! */
727 FL bool_t
728 url_parse(struct url *urlp, enum cproto cproto, char const *data)
729 {
730 #if defined HAVE_SMTP && defined HAVE_POP3
731 # define __ALLPROTO
732 #endif
733 #if defined HAVE_SMTP || defined HAVE_POP3
734 # define __ANYPROTO
735 char *cp, *x;
736 #endif
737 bool_t rv = FAL0;
738 NYD_ENTER;
739 UNUSED(data);
740
741 memset(urlp, 0, sizeof *urlp);
742 urlp->url_input = data;
743 urlp->url_cproto = cproto;
744
745 /* Network protocol */
746 #define _protox(X,Y) \
747 urlp->url_portno = Y;\
748 memcpy(urlp->url_proto, X "://", sizeof(X "://"));\
749 urlp->url_proto[sizeof(X) -1] = '\0';\
750 urlp->url_proto_len = sizeof(X) -1;\
751 urlp->url_proto_xlen = sizeof(X "://") -1
752 #define __if(X,Y,Z) \
753 if (!ascncasecmp(data, X "://", sizeof(X "://") -1)) {\
754 _protox(X, Y);\
755 data += sizeof(X "://") -1;\
756 do { Z; } while (0);\
757 goto juser;\
758 }
759 #define _if(X,Y) __if(X, Y, (void)0)
760 #ifdef HAVE_SSL
761 # define _ifs(X,Y) __if(X, Y, urlp->url_needs_tls = TRU1)
762 #else
763 # define _ifs(X,Y) goto jeproto;
764 #endif
765
766 switch (cproto) {
767 case CPROTO_SMTP:
768 #ifdef HAVE_SMTP
769 _if ("smtp", 25)
770 _if ("submission", 587)
771 _ifs ("smtps", 465)
772 _protox("smtp", 25);
773 break;
774 #else
775 goto jeproto;
776 #endif
777 case CPROTO_POP3:
778 #ifdef HAVE_POP3
779 _if ("pop3", 110)
780 _ifs ("pop3s", 995)
781 _protox("pop3", 110);
782 break;
783 #else
784 goto jeproto;
785 #endif
786 #if 0
787 case CPROTO_IMAP:
788 _if ("imap", 143)
789 _ifs ("imaps", 993)
790 _protox("imap", 143);
791 break;
792 goto jeproto;
793 #endif
794 }
795
796 #undef _ifs
797 #undef _if
798 #undef __if
799 #undef _protox
800
801 if (strstr(data, "://") != NULL) {
802 #if !defined __ALLPROTO || !defined HAVE_SSL
803 jeproto:
804 #endif
805 n_err(_("URL proto:// prefix invalid: %s\n"), urlp->url_input);
806 goto jleave;
807 }
808 #ifdef __ANYPROTO
809
810 /* User and password, I */
811 juser:
812 if ((cp = _url_last_at_before_slash(data)) != NULL) {
813 size_t l = PTR2SIZE(cp - data);
814 char const *d = data;
815 char *ub = ac_alloc(l +1);
816
817 urlp->url_had_user = TRU1;
818 data = cp + 1;
819
820 /* And also have a password? */
821 if ((cp = memchr(d, ':', l)) != NULL) {
822 size_t i = PTR2SIZE(cp - d);
823
824 l -= i + 1;
825 memcpy(ub, cp + 1, l);
826 ub[l] = '\0';
827 urlp->url_pass.l = strlen(urlp->url_pass.s = urlxdec(ub));
828
829 if (strcmp(ub, urlxenc(urlp->url_pass.s, FAL0))) {
830 n_err(_("String is not properly URL percent encoded: %s\n"),
831 ub);
832 goto jleave;
833 }
834 l = i;
835 }
836
837 memcpy(ub, d, l);
838 ub[l] = '\0';
839 urlp->url_user.l = strlen(urlp->url_user.s = urlxdec(ub));
840 urlp->url_user_enc.l = strlen(
841 urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0));
842
843 if (urlp->url_user_enc.l != l || memcmp(urlp->url_user_enc.s, ub, l)) {
844 n_err(_("String is not properly URL percent encoded: %s\n"), ub);
845 goto jleave;
846 }
847
848 ac_free(ub);
849 }
850
851 /* Servername and port -- and possible path suffix */
852 if ((cp = strchr(data, ':')) != NULL) { /* TODO URL parse, IPv6 support */
853 char *eptr;
854 long l;
855
856 urlp->url_port = x = savestr(x = &cp[1]);
857 if ((x = strchr(x, '/')) != NULL) {
858 *x = '\0';
859 while(*++x == '/')
860 ;
861 }
862 l = strtol(urlp->url_port, &eptr, 10);
863 if (*eptr != '\0' || l <= 0 || UICMP(32, l, >=, 0xFFFFu)) {
864 n_err(_("URL with invalid port number: %s\n"), urlp->url_input);
865 goto jleave;
866 }
867 urlp->url_portno = (ui16_t)l;
868 } else {
869 if ((x = strchr(data, '/')) != NULL) {
870 data = savestrbuf(data, PTR2SIZE(x - data));
871 while(*++x == '/')
872 ;
873 }
874 cp = UNCONST(data + strlen(data));
875 }
876
877 /* A (non-empty) path may only occur with IMAP */
878 if (x != NULL && *x != '\0') {
879 /* Take care not to count adjacent slashes for real, on either end */
880 char *x2;
881 size_t i;
882
883 for(x2 = savestrbuf(x, i = strlen(x)); i > 0; --i)
884 if(x2[i - 1] != '/')
885 break;
886 x2[i] = '\0';
887
888 if (i > 0) {
889 #if 0
890 if (cproto != CPROTO_IMAP) {
891 #endif
892 n_err(_("URL protocol doesn't support paths: \"%s\"\n"),
893 urlp->url_input);
894 goto jleave;
895 #if 0
896 }
897 urlp->url_path.l = i;
898 urlp->url_path.s = x2;
899 #endif
900 }
901 }
902
903 urlp->url_host.s = savestrbuf(data, urlp->url_host.l = PTR2SIZE(cp - data));
904 { size_t i;
905 for (cp = urlp->url_host.s, i = urlp->url_host.l; i != 0; ++cp, --i)
906 *cp = lowerconv(*cp);
907 }
908
909 /* .url_h_p: HOST:PORT */
910 { size_t i;
911 struct str *s = &urlp->url_h_p;
912
913 s->s = salloc(urlp->url_host.l + 1 + sizeof("65536")-1 +1);
914 memcpy(s->s, urlp->url_host.s, i = urlp->url_host.l);
915 if (urlp->url_port != NULL) {
916 size_t j = strlen(urlp->url_port);
917 s->s[i++] = ':';
918 memcpy(s->s + i, urlp->url_port, j);
919 i += j;
920 }
921 s->s[i] = '\0';
922 s->l = i;
923 }
924
925 /* User, II
926 * If there was no user in the URL, do we have *user-HOST* or *user*? */
927 if (!urlp->url_had_user) {
928 if ((urlp->url_user.s = xok_vlook(user, urlp, OXM_PLAIN | OXM_H_P))
929 == NULL) {
930 /* No, check whether .netrc lookup is desired */
931 # ifdef HAVE_NETRC
932 if (!ok_blook(v15_compat) ||
933 !xok_blook(netrc_lookup, urlp, OXM_PLAIN | OXM_H_P) ||
934 !_nrc_lookup(urlp, FAL0))
935 # endif
936 urlp->url_user.s = UNCONST(myname);
937 }
938
939 urlp->url_user.l = strlen(urlp->url_user.s);
940 urlp->url_user.s = savestrbuf(urlp->url_user.s, urlp->url_user.l);
941 urlp->url_user_enc.l = strlen(
942 urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0));
943 }
944
945 /* And then there are a lot of prebuild string combinations TODO do lazy */
946
947 /* .url_u_h: .url_user@.url_host
948 * For SMTP we apply ridiculously complicated *v15-compat* plus
949 * *smtp-hostname* / *hostname* dependent rules */
950 { struct str h, *s;
951 size_t i;
952
953 if (cproto == CPROTO_SMTP && ok_blook(v15_compat) &&
954 (cp = ok_vlook(smtp_hostname)) != NULL) {
955 if (*cp == '\0')
956 cp = nodename(1);
957 h.s = savestrbuf(cp, h.l = strlen(cp));
958 } else
959 h = urlp->url_host;
960
961 s = &urlp->url_u_h;
962 i = urlp->url_user.l;
963
964 s->s = salloc(i + 1 + h.l +1);
965 if (i > 0) {
966 memcpy(s->s, urlp->url_user.s, i);
967 s->s[i++] = '@';
968 }
969 memcpy(s->s + i, h.s, h.l +1);
970 i += h.l;
971 s->l = i;
972 }
973
974 /* .url_u_h_p: .url_user@.url_host[:.url_port] */
975 { struct str *s = &urlp->url_u_h_p;
976 size_t i = urlp->url_user.l;
977
978 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
979 if (i > 0) {
980 memcpy(s->s, urlp->url_user.s, i);
981 s->s[i++] = '@';
982 }
983 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
984 i += urlp->url_h_p.l;
985 s->l = i;
986 }
987
988 /* .url_eu_h_p: .url_user_enc@.url_host[:.url_port] */
989 { struct str *s = &urlp->url_eu_h_p;
990 size_t i = urlp->url_user_enc.l;
991
992 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
993 if (i > 0) {
994 memcpy(s->s, urlp->url_user_enc.s, i);
995 s->s[i++] = '@';
996 }
997 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
998 i += urlp->url_h_p.l;
999 s->l = i;
1000 }
1001
1002 /* .url_p_u_h_p: .url_proto://.url_u_h_p */
1003 { size_t i;
1004 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_u_h_p.l) +1);
1005
1006 urlp->url_proto[urlp->url_proto_len] = ':';
1007 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_u_h_p.s,
1008 urlp->url_u_h_p.l +1);
1009 urlp->url_proto[urlp->url_proto_len] = '\0';
1010
1011 urlp->url_p_u_h_p = ud;
1012 }
1013
1014 /* .url_p_eu_h_p, .url_p_eu_h_p_p: .url_proto://.url_eu_h_p[/.url_path] */
1015 { size_t i;
1016 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_eu_h_p.l) +
1017 1 + urlp->url_path.l +1);
1018
1019 urlp->url_proto[urlp->url_proto_len] = ':';
1020 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_eu_h_p.s,
1021 urlp->url_eu_h_p.l +1);
1022 urlp->url_proto[urlp->url_proto_len] = '\0';
1023
1024 if (urlp->url_path.l == 0)
1025 urlp->url_p_eu_h_p = urlp->url_p_eu_h_p_p = ud;
1026 else {
1027 urlp->url_p_eu_h_p = savestrbuf(ud, i);
1028 urlp->url_p_eu_h_p_p = ud;
1029 ud += i;
1030 *ud++ = '/';
1031 memcpy(ud, urlp->url_path.s, urlp->url_path.l +1);
1032 }
1033 }
1034
1035 rv = TRU1;
1036 #endif /* __ANYPROTO */
1037 jleave:
1038 NYD_LEAVE;
1039 return rv;
1040 #undef __ANYPROTO
1041 #undef __ALLPROTO
1042 }
1043
1044 FL bool_t
1045 ccred_lookup_old(struct ccred *ccp, enum cproto cproto, char const *addr)
1046 {
1047 char const *pname, *pxstr, *authdef;
1048 size_t pxlen, addrlen, i;
1049 char *vbuf, *s;
1050 ui8_t authmask;
1051 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1052 ware = NONE;
1053 bool_t addr_is_nuser = FAL0; /* XXX v15.0 legacy! v15_compat */
1054 NYD_ENTER;
1055
1056 memset(ccp, 0, sizeof *ccp);
1057
1058 switch (cproto) {
1059 default:
1060 case CPROTO_SMTP:
1061 pname = "SMTP";
1062 pxstr = "smtp-auth";
1063 pxlen = sizeof("smtp-auth") -1;
1064 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1065 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1066 authdef = "none";
1067 addr_is_nuser = TRU1;
1068 break;
1069 case CPROTO_POP3:
1070 pname = "POP3";
1071 pxstr = "pop3-auth";
1072 pxlen = sizeof("pop3-auth") -1;
1073 authmask = AUTHTYPE_PLAIN;
1074 authdef = "plain";
1075 break;
1076 }
1077
1078 ccp->cc_cproto = cproto;
1079 addrlen = strlen(addr);
1080 vbuf = ac_alloc(pxlen + addrlen + sizeof("-password-")-1 +1);
1081 memcpy(vbuf, pxstr, pxlen);
1082
1083 /* Authentication type */
1084 vbuf[pxlen] = '-';
1085 memcpy(vbuf + pxlen + 1, addr, addrlen +1);
1086 if ((s = vok_vlook(vbuf)) == NULL) {
1087 vbuf[pxlen] = '\0';
1088 if ((s = vok_vlook(vbuf)) == NULL)
1089 s = UNCONST(authdef);
1090 }
1091
1092 if (!asccasecmp(s, "none")) {
1093 ccp->cc_auth = "NONE";
1094 ccp->cc_authtype = AUTHTYPE_NONE;
1095 /*ware = NONE;*/
1096 } else if (!asccasecmp(s, "plain")) {
1097 ccp->cc_auth = "PLAIN";
1098 ccp->cc_authtype = AUTHTYPE_PLAIN;
1099 ware = REQ_PASS | REQ_USER;
1100 } else if (!asccasecmp(s, "login")) {
1101 ccp->cc_auth = "LOGIN";
1102 ccp->cc_authtype = AUTHTYPE_LOGIN;
1103 ware = REQ_PASS | REQ_USER;
1104 } else if (!asccasecmp(s, "cram-md5")) {
1105 ccp->cc_auth = "CRAM-MD5";
1106 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1107 ware = REQ_PASS | REQ_USER;
1108 } else if (!asccasecmp(s, "gssapi")) {
1109 ccp->cc_auth = "GSS-API";
1110 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1111 ware = REQ_USER;
1112 } /* no else */
1113
1114 /* Verify method */
1115 if (!(ccp->cc_authtype & authmask)) {
1116 n_err(_("Unsupported %s authentication method: %s\n"), pname, s);
1117 ccp = NULL;
1118 goto jleave;
1119 }
1120 # ifndef HAVE_MD5
1121 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1122 n_err(_("No CRAM-MD5 support compiled in\n"));
1123 ccp = NULL;
1124 goto jleave;
1125 }
1126 # endif
1127 # ifndef HAVE_GSSAPI
1128 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1129 n_err(_("No GSS-API support compiled in\n"));
1130 ccp = NULL;
1131 goto jleave;
1132 }
1133 # endif
1134
1135 /* User name */
1136 if (!(ware & (WANT_USER | REQ_USER)))
1137 goto jpass;
1138
1139 if (!addr_is_nuser) {
1140 if ((s = _url_last_at_before_slash(addr)) != NULL) {
1141 ccp->cc_user.s = urlxdec(savestrbuf(addr, PTR2SIZE(s - addr)));
1142 ccp->cc_user.l = strlen(ccp->cc_user.s);
1143 } else if (ware & REQ_USER)
1144 goto jgetuser;
1145 goto jpass;
1146 }
1147
1148 memcpy(vbuf + pxlen, "-user-", i = sizeof("-user-") -1);
1149 i += pxlen;
1150 memcpy(vbuf + i, addr, addrlen +1);
1151 if ((s = vok_vlook(vbuf)) == NULL) {
1152 vbuf[--i] = '\0';
1153 if ((s = vok_vlook(vbuf)) == NULL && (ware & REQ_USER)) {
1154 if ((s = getuser(NULL)) == NULL) {
1155 jgetuser: /* TODO v15.0: today we simply bail, but we should call getuser().
1156 * TODO even better: introduce "PROTO-user" and "PROTO-pass" and
1157 * TODO check that first, then! change control flow, grow vbuf */
1158 n_err(_("A user is necessary for %s authentication\n"), pname);
1159 ccp = NULL;
1160 goto jleave;
1161 }
1162 }
1163 }
1164 ccp->cc_user.l = strlen(ccp->cc_user.s = savestr(s));
1165
1166 /* Password */
1167 jpass:
1168 if (!(ware & (WANT_PASS | REQ_PASS)))
1169 goto jleave;
1170
1171 if (!addr_is_nuser) {
1172 memcpy(vbuf, "password-", i = sizeof("password-") -1);
1173 } else {
1174 memcpy(vbuf + pxlen, "-password-", i = sizeof("-password-") -1);
1175 i += pxlen;
1176 }
1177 memcpy(vbuf + i, addr, addrlen +1);
1178 if ((s = vok_vlook(vbuf)) == NULL) {
1179 vbuf[--i] = '\0';
1180 if ((!addr_is_nuser || (s = vok_vlook(vbuf)) == NULL) &&
1181 (ware & REQ_PASS)) {
1182 if ((s = getpassword(NULL)) == NULL) {
1183 n_err(_("A password is necessary for %s authentication\n"),
1184 pname);
1185 ccp = NULL;
1186 goto jleave;
1187 }
1188 }
1189 }
1190 if (s != NULL)
1191 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1192
1193 jleave:
1194 ac_free(vbuf);
1195 if (ccp != NULL && (options & OPT_D_VV))
1196 n_err(_("Credentials: host %s, user %s, pass %s\n"),
1197 addr, (ccp->cc_user.s != NULL ? ccp->cc_user.s : ""),
1198 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : ""));
1199 NYD_LEAVE;
1200 return (ccp != NULL);
1201 }
1202
1203 FL bool_t
1204 ccred_lookup(struct ccred *ccp, struct url *urlp)
1205 {
1206 char const *pstr, *authdef;
1207 char *s;
1208 enum okeys authokey;
1209 ui8_t authmask;
1210 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1211 ware = NONE;
1212 NYD_ENTER;
1213
1214 memset(ccp, 0, sizeof *ccp);
1215 ccp->cc_user = urlp->url_user;
1216
1217 switch ((ccp->cc_cproto = urlp->url_cproto)) {
1218 default:
1219 case CPROTO_SMTP:
1220 pstr = "smtp";
1221 authokey = ok_v_smtp_auth;
1222 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1223 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1224 authdef = "plain";
1225 break;
1226 case CPROTO_POP3:
1227 pstr = "pop3";
1228 authokey = ok_v_pop3_auth;
1229 authmask = AUTHTYPE_PLAIN;
1230 authdef = "plain";
1231 break;
1232 }
1233
1234 /* Authentication type */
1235 if ((s = xok_VLOOK(authokey, urlp, OXM_ALL)) == NULL)
1236 s = UNCONST(authdef);
1237
1238 if (!asccasecmp(s, "none")) {
1239 ccp->cc_auth = "NONE";
1240 ccp->cc_authtype = AUTHTYPE_NONE;
1241 /*ware = NONE;*/
1242 } else if (!asccasecmp(s, "plain")) {
1243 ccp->cc_auth = "PLAIN";
1244 ccp->cc_authtype = AUTHTYPE_PLAIN;
1245 ware = REQ_PASS | REQ_USER;
1246 } else if (!asccasecmp(s, "login")) {
1247 ccp->cc_auth = "LOGIN";
1248 ccp->cc_authtype = AUTHTYPE_LOGIN;
1249 ware = REQ_PASS | REQ_USER;
1250 } else if (!asccasecmp(s, "cram-md5")) {
1251 ccp->cc_auth = "CRAM-MD5";
1252 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1253 ware = REQ_PASS | REQ_USER;
1254 } else if (!asccasecmp(s, "gssapi")) {
1255 ccp->cc_auth = "GSS-API";
1256 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1257 ware = REQ_USER;
1258 } /* no else */
1259
1260 /* Verify method */
1261 if (!(ccp->cc_authtype & authmask)) {
1262 n_err(_("Unsupported %s authentication method: %s\n"), pstr, s);
1263 ccp = NULL;
1264 goto jleave;
1265 }
1266 # ifndef HAVE_MD5
1267 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1268 n_err(_("No CRAM-MD5 support compiled in\n"));
1269 ccp = NULL;
1270 goto jleave;
1271 }
1272 # endif
1273 # ifndef HAVE_GSSAPI
1274 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1275 n_err(_("No GSS-API support compiled in\n"));
1276 ccp = NULL;
1277 goto jleave;
1278 }
1279 # endif
1280
1281 /* Password */
1282 ccp->cc_pass = urlp->url_pass;
1283 if (ccp->cc_pass.s != NULL)
1284 goto jleave;
1285
1286 if ((s = xok_vlook(password, urlp, OXM_ALL)) != NULL)
1287 goto js2pass;
1288 # ifdef HAVE_AGENT /* TODO v15-compat obsolete */
1289 if ((s = xok_vlook(agent_shell_lookup, urlp, OXM_ALL)) != NULL) {
1290 OBSOLETE(_("*agent-shell-lookup* will vanish. Please use encrypted "
1291 "~/.netrc (via *netrc-pipe*), or simply `source' an encrypted file"));
1292 if (!_agent_shell_lookup(urlp, s)) {
1293 ccp = NULL;
1294 goto jleave;
1295 } else if (urlp->url_pass.s != NULL) {
1296 ccp->cc_pass = urlp->url_pass;
1297 goto jleave;
1298 }
1299 }
1300 # endif
1301 # ifdef HAVE_NETRC
1302 if (xok_blook(netrc_lookup, urlp, OXM_ALL) && _nrc_lookup(urlp, TRU1)) {
1303 ccp->cc_pass = urlp->url_pass;
1304 goto jleave;
1305 }
1306 # endif
1307 if (ware & REQ_PASS) {
1308 if ((s = getpassword(NULL)) != NULL)
1309 js2pass:
1310 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1311 else {
1312 n_err(_("A password is necessary for %s authentication\n"), pstr);
1313 ccp = NULL;
1314 }
1315 }
1316
1317 jleave:
1318 if (ccp != NULL && (options & OPT_D_VV))
1319 n_err(_("Credentials: host %s, user %s, pass %s\n"),
1320 urlp->url_h_p.s, (ccp->cc_user.s != NULL ? ccp->cc_user.s : ""),
1321 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : ""));
1322 NYD_LEAVE;
1323 return (ccp != NULL);
1324 }
1325 #endif /* HAVE_SOCKETS */
1326
1327 #ifdef HAVE_NETRC
1328 FL int
1329 c_netrc(void *v)
1330 {
1331 char **argv = v;
1332 struct nrc_node *nrc;
1333 bool_t load_only;
1334 NYD_ENTER;
1335
1336 load_only = FAL0;
1337 if (*argv == NULL)
1338 goto jlist;
1339 if (argv[1] != NULL)
1340 goto jerr;
1341 if (!asccasecmp(*argv, "show"))
1342 goto jlist;
1343 load_only = TRU1;
1344 if (!asccasecmp(*argv, "load"))
1345 goto jlist;
1346 if (!asccasecmp(*argv, "clear"))
1347 goto jclear;
1348 jerr:
1349 n_err(_("Synopsis: netrc: (<show> or) <clear> the .netrc cache\n"));
1350 v = NULL;
1351 jleave:
1352 NYD_LEAVE;
1353 return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
1354
1355 jlist: {
1356 FILE *fp;
1357 size_t l;
1358
1359 if (_nrc_list == NULL)
1360 _nrc_init();
1361 if (_nrc_list == NRC_NODE_ERR) {
1362 n_err(_("Interpolate what file?\n"));
1363 v = NULL;
1364 goto jleave;
1365 }
1366 if (load_only)
1367 goto jleave;
1368
1369 if ((fp = Ftmp(NULL, "netrc", OF_RDWR | OF_UNLINK | OF_REGISTER)) == NULL) {
1370 n_perr(_("tmpfile"), 0);
1371 v = NULL;
1372 goto jleave;
1373 }
1374
1375 for (l = 0, nrc = _nrc_list; nrc != NULL; ++l, nrc = nrc->nrc_next) {
1376 fprintf(fp, _("machine %s "), nrc->nrc_dat); /* XXX quote? */
1377 if (nrc->nrc_ulen > 0)
1378 fprintf(fp, _("login \"%s\" "),
1379 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1));
1380 if (nrc->nrc_plen > 0)
1381 fprintf(fp, _("password \"%s\"\n"),
1382 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1 + nrc->nrc_ulen +1));
1383 else
1384 putc('\n', fp);
1385 }
1386
1387 page_or_print(fp, l);
1388 Fclose(fp);
1389 }
1390 goto jleave;
1391
1392 jclear:
1393 if (_nrc_list == NRC_NODE_ERR)
1394 _nrc_list = NULL;
1395 while ((nrc = _nrc_list) != NULL) {
1396 _nrc_list = nrc->nrc_next;
1397 free(nrc);
1398 }
1399 goto jleave;
1400 }
1401 #endif /* HAVE_NETRC */
1402
1403 #ifdef HAVE_MD5
1404 FL char *
1405 md5tohex(char hex[MD5TOHEX_SIZE], void const *vp)
1406 {
1407 char const *cp = vp;
1408 size_t i, j;
1409 NYD_ENTER;
1410
1411 for (i = 0; i < MD5TOHEX_SIZE / 2; ++i) {
1412 j = i << 1;
1413 # define __hex(n) ((n) > 9 ? (n) - 10 + 'a' : (n) + '0')
1414 hex[j] = __hex((cp[i] & 0xF0) >> 4);
1415 hex[++j] = __hex(cp[i] & 0x0F);
1416 # undef __hex
1417 }
1418 NYD_LEAVE;
1419 return hex;
1420 }
1421
1422 FL char *
1423 cram_md5_string(struct str const *user, struct str const *pass,
1424 char const *b64)
1425 {
1426 struct str in, out;
1427 char digest[16], *cp;
1428 NYD_ENTER;
1429
1430 out.s = NULL;
1431 in.s = UNCONST(b64);
1432 in.l = strlen(in.s);
1433 b64_decode(&out, &in, NULL);
1434 assert(out.s != NULL);
1435
1436 hmac_md5((uc_i*)out.s, out.l, (uc_i*)pass->s, pass->l, digest);
1437 free(out.s);
1438 cp = md5tohex(salloc(MD5TOHEX_SIZE +1), digest);
1439
1440 in.l = user->l + MD5TOHEX_SIZE +1;
1441 in.s = ac_alloc(user->l + 1 + MD5TOHEX_SIZE +1);
1442 memcpy(in.s, user->s, user->l);
1443 in.s[user->l] = ' ';
1444 memcpy(in.s + user->l + 1, cp, MD5TOHEX_SIZE);
1445 b64_encode(&out, &in, B64_SALLOC | B64_CRLF);
1446 ac_free(in.s);
1447 NYD_LEAVE;
1448 return out.s;
1449 }
1450
1451 FL void
1452 hmac_md5(unsigned char *text, int text_len, unsigned char *key, int key_len,
1453 void *digest)
1454 {
1455 /*
1456 * This code is taken from
1457 *
1458 * Network Working Group H. Krawczyk
1459 * Request for Comments: 2104 IBM
1460 * Category: Informational M. Bellare
1461 * UCSD
1462 * R. Canetti
1463 * IBM
1464 * February 1997
1465 *
1466 *
1467 * HMAC: Keyed-Hashing for Message Authentication
1468 */
1469 md5_ctx context;
1470 unsigned char k_ipad[65]; /* inner padding - key XORd with ipad */
1471 unsigned char k_opad[65]; /* outer padding - key XORd with opad */
1472 unsigned char tk[16];
1473 int i;
1474 NYD_ENTER;
1475
1476 /* if key is longer than 64 bytes reset it to key=MD5(key) */
1477 if (key_len > 64) {
1478 md5_ctx tctx;
1479
1480 md5_init(&tctx);
1481 md5_update(&tctx, key, key_len);
1482 md5_final(tk, &tctx);
1483
1484 key = tk;
1485 key_len = 16;
1486 }
1487
1488 /* the HMAC_MD5 transform looks like:
1489 *
1490 * MD5(K XOR opad, MD5(K XOR ipad, text))
1491 *
1492 * where K is an n byte key
1493 * ipad is the byte 0x36 repeated 64 times
1494 * opad is the byte 0x5c repeated 64 times
1495 * and text is the data being protected */
1496
1497 /* start out by storing key in pads */
1498 memset(k_ipad, 0, sizeof k_ipad);
1499 memset(k_opad, 0, sizeof k_opad);
1500 memcpy(k_ipad, key, key_len);
1501 memcpy(k_opad, key, key_len);
1502
1503 /* XOR key with ipad and opad values */
1504 for (i=0; i<64; i++) {
1505 k_ipad[i] ^= 0x36;
1506 k_opad[i] ^= 0x5c;
1507 }
1508
1509 /* perform inner MD5 */
1510 md5_init(&context); /* init context for 1st pass */
1511 md5_update(&context, k_ipad, 64); /* start with inner pad */
1512 md5_update(&context, text, text_len); /* then text of datagram */
1513 md5_final(digest, &context); /* finish up 1st pass */
1514
1515 /* perform outer MD5 */
1516 md5_init(&context); /* init context for 2nd pass */
1517 md5_update(&context, k_opad, 64); /* start with outer pad */
1518 md5_update(&context, digest, 16); /* then results of 1st hash */
1519 md5_final(digest, &context); /* finish up 2nd pass */
1520 NYD_LEAVE;
1521 }
1522 #endif /* HAVE_MD5 */
1523
1524 /* s-it-mode */
A mail processing system intended to provide the functionality of the POSIX mailx(1) command