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FIX "," message specification (since [1c4b8c9], v14.8.4)..
[s-mailx.git] / urlcrecry.c
blob174a964a6e58dc67c08378eb48d09d112f323a6a
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 - 2015 Steffen (Daode) Nurpmeso <sdaoden@users.sf.net>.
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
68 /* We shall lookup a machine in .netrc says ok_blook(netrc_lookup).
69 * only_pass is true then the lookup is for the password only, otherwise we
70 * look for a user (and add password only if we have an exact machine match) */
71 static bool_t _nrc_lookup(struct url *urlp, bool_t only_pass);
72
73 /* 0=no match; 1=exact match; -1=wildcard match */
74 static int __nrc_host_match(struct nrc_node const *nrc,
75 struct url const *urlp);
76 static bool_t __nrc_find_user(struct url *urlp,
77 struct nrc_node const *nrc);
78 static bool_t __nrc_find_pass(struct url *urlp, bool_t user_match,
79 struct nrc_node const *nrc);
80 #endif /* HAVE_NETRC */
81
82 /* The password can also be gained through external agents */
83 #ifdef HAVE_AGENT
84 static bool_t _agent_shell_lookup(struct url *urlp, char const *comm);
85 #endif
86
87 #ifdef HAVE_SOCKETS
88 static char *
89 _url_last_at_before_slash(char const *sp)
90 {
91 char const *cp;
92 char c;
93 NYD2_ENTER;
94
95 for (cp = sp; (c = *cp) != '\0'; ++cp)
96 if (c == '/')
97 break;
98 while (cp > sp && *--cp != '@')
99 ;
100 if (*cp != '@')
101 cp = NULL;
102 NYD2_LEAVE;
103 return UNCONST(cp);
104 }
105 #endif
106
107 #ifdef HAVE_NETRC
108 static void
109 _nrc_init(void)
110 {
111 char buffer[NRC_TOKEN_MAXLEN], host[NRC_TOKEN_MAXLEN],
112 user[NRC_TOKEN_MAXLEN], pass[NRC_TOKEN_MAXLEN], *netrc_load;
113 struct stat sb;
114 FILE *fi;
115 enum nrc_token t;
116 bool_t seen_default;
117 struct nrc_node *ntail = NULL /* CC happy */, *nhead = NULL,
118 *nrc = NRC_NODE_ERR;
119 NYD_ENTER;
120
121 if ((netrc_load = env_vlook("NETRC", FAL0)) == NULL)
122 netrc_load = UNCONST(NETRC);
123 if ((netrc_load = file_expand(netrc_load)) == NULL)
124 goto j_leave;
125
126 if ((fi = Fopen(netrc_load, "r")) == NULL) {
127 n_err(_("Cannot open \"%s\"\n"), netrc_load);
128 goto j_leave;
129 }
130
131 /* Be simple and apply rigid (permission) check(s) */
132 if (fstat(fileno(fi), &sb) == -1 || !S_ISREG(sb.st_mode) ||
133 (sb.st_mode & (S_IRWXG | S_IRWXO))) {
134 n_err(_("Not a regular file, or accessible by non-user: \"%s\"\n"),
135 netrc_load);
136 goto jleave;
137 }
138
139 seen_default = FAL0;
140 jnext:
141 switch((t = __nrc_token(fi, buffer))) {
142 case NRC_NONE:
143 break;
144 default: /* Doesn't happen (but on error?), keep CC happy */
145 case NRC_DEFAULT:
146 jdef:
147 /* We ignore the default entry (require an exact host match), and we also
148 * ignore anything after such an entry (faulty syntax) */
149 seen_default = TRU1;
150 /* FALLTHRU */
151 case NRC_MACHINE:
152 jm_h:
153 /* Normalize HOST to lowercase */
154 *host = '\0';
155 if (!seen_default && (t = __nrc_token(fi, host)) != NRC_INPUT)
156 goto jerr;
157 else {
158 char *cp;
159 for (cp = host; *cp != '\0'; ++cp)
160 *cp = lowerconv(*cp);
161 }
162
163 *user = *pass = '\0';
164 while ((t = __nrc_token(fi, buffer)) != NRC_NONE && t != NRC_MACHINE &&
165 t != NRC_DEFAULT) {
166 switch(t) {
167 case NRC_LOGIN:
168 if ((t = __nrc_token(fi, user)) != NRC_INPUT)
169 goto jerr;
170 break;
171 case NRC_PASSWORD:
172 if ((t = __nrc_token(fi, pass)) != NRC_INPUT)
173 goto jerr;
174 break;
175 case NRC_ACCOUNT:
176 if ((t = __nrc_token(fi, buffer)) != NRC_INPUT)
177 goto jerr;
178 break;
179 case NRC_MACDEF:
180 if ((t = __nrc_token(fi, buffer)) != NRC_INPUT)
181 goto jerr;
182 else {
183 int i = 0, c;
184 while ((c = getc(fi)) != EOF)
185 if (c == '\n') { /* xxx */
186 if (i)
187 break;
188 i = 1;
189 } else
190 i = 0;
191 }
192 break;
193 default:
194 case NRC_ERROR:
195 goto jerr;
196 }
197 }
198
199 if (!seen_default && (*user != '\0' || *pass != '\0')) {
200 size_t hl = strlen(host), ul = strlen(user), pl = strlen(pass);
201 struct nrc_node *nx = smalloc(sizeof(*nx) -
202 VFIELD_SIZEOF(struct nrc_node, nrc_dat) + hl +1 + ul +1 + pl +1);
203
204 if (nhead != NULL)
205 ntail->nrc_next = nx;
206 else
207 nhead = nx;
208 ntail = nx;
209 nx->nrc_next = NULL;
210 nx->nrc_mlen = hl;
211 nx->nrc_ulen = ul;
212 nx->nrc_plen = pl;
213 memcpy(nx->nrc_dat, host, ++hl);
214 memcpy(nx->nrc_dat + hl, user, ++ul);
215 memcpy(nx->nrc_dat + hl + ul, pass, ++pl);
216 }
217 if (t == NRC_MACHINE)
218 goto jm_h;
219 if (t == NRC_DEFAULT)
220 goto jdef;
221 if (t != NRC_NONE)
222 goto jnext;
223 break;
224 case NRC_ERROR:
225 jerr:
226 if (options & OPT_D_V)
227 n_err(_("Errors occurred while parsing \"%s\"\n"), netrc_load);
228 assert(nrc == NRC_NODE_ERR);
229 goto jleave;
230 }
231
232 if (nhead != NULL)
233 nrc = nhead;
234 jleave:
235 Fclose(fi);
236 if (nrc == NRC_NODE_ERR)
237 while (nhead != NULL) {
238 ntail = nhead;
239 nhead = nhead->nrc_next;
240 free(ntail);
241 }
242 j_leave:
243 _nrc_list = nrc;
244 NYD_LEAVE;
245 }
246
247 static enum nrc_token
248 __nrc_token(FILE *fi, char buffer[NRC_TOKEN_MAXLEN])
249 {
250 int c;
251 char *cp;
252 enum nrc_token rv = NRC_NONE;
253 NYD2_ENTER;
254
255 c = EOF;
256 if (feof(fi) || ferror(fi))
257 goto jleave;
258
259 while ((c = getc(fi)) != EOF && whitechar(c))
260 ;
261 if (c == EOF)
262 goto jleave;
263
264 cp = buffer;
265 /* Is it a quoted token? At least IBM syntax also supports ' quotes */
266 if (c == '"' || c == '\'') {
267 int quotec = c;
268
269 /* Not requiring the closing QM is (Net)BSD syntax */
270 while ((c = getc(fi)) != EOF && c != quotec) {
271 /* Backslash escaping the next character is (Net)BSD syntax */
272 if (c == '\\')
273 if ((c = getc(fi)) == EOF)
274 break;
275 *cp++ = c;
276 if (PTRCMP(cp, ==, buffer + NRC_TOKEN_MAXLEN)) {
277 rv = NRC_ERROR;
278 goto jleave;
279 }
280 }
281 } else {
282 *cp++ = c;
283 while ((c = getc(fi)) != EOF && !whitechar(c)) {
284 /* Backslash escaping the next character is (Net)BSD syntax */
285 if (c == '\\' && (c = getc(fi)) == EOF)
286 break;
287 *cp++ = c;
288 if (PTRCMP(cp, ==, buffer + NRC_TOKEN_MAXLEN)) {
289 rv = NRC_ERROR;
290 goto jleave;
291 }
292 }
293 }
294 *cp = '\0';
295
296 if (*buffer == '\0')
297 do {/*rv = NRC_NONE*/} while (0);
298 else if (!strcmp(buffer, "default"))
299 rv = NRC_DEFAULT;
300 else if (!strcmp(buffer, "login"))
301 rv = NRC_LOGIN;
302 else if (!strcmp(buffer, "password") || !strcmp(buffer, "passwd"))
303 rv = NRC_PASSWORD;
304 else if (!strcmp(buffer, "account"))
305 rv = NRC_ACCOUNT;
306 else if (!strcmp(buffer, "macdef"))
307 rv = NRC_MACDEF;
308 else if (!strcmp(buffer, "machine"))
309 rv = NRC_MACHINE;
310 else
311 rv = NRC_INPUT;
312 jleave:
313 if (c == EOF && !feof(fi))
314 rv = NRC_ERROR;
315 NYD2_LEAVE;
316 return rv;
317 }
318
319 static bool_t
320 _nrc_lookup(struct url *urlp, bool_t only_pass)
321 {
322 struct nrc_node *nrc, *nrc_wild, *nrc_exact;
323 bool_t rv = FAL0;
324 NYD_ENTER;
325
326 assert(!only_pass || urlp->url_user.s != NULL);
327 assert(only_pass || urlp->url_user.s == NULL);
328
329 if (_nrc_list == NULL)
330 _nrc_init();
331 if (_nrc_list == NRC_NODE_ERR)
332 goto jleave;
333
334 nrc_wild = nrc_exact = NULL;
335 for (nrc = _nrc_list; nrc != NULL; nrc = nrc->nrc_next)
336 switch (__nrc_host_match(nrc, urlp)) {
337 case 1:
338 nrc->nrc_result = nrc_exact;
339 nrc_exact = nrc;
340 continue;
341 case -1:
342 nrc->nrc_result = nrc_wild;
343 nrc_wild = nrc;
344 /* FALLTHRU */
345 case 0:
346 continue;
347 }
348
349 if (!only_pass && urlp->url_user.s == NULL) {
350 /* Must be an unambiguous entry of its kind */
351 if (nrc_exact != NULL && nrc_exact->nrc_result != NULL)
352 goto jleave;
353 if (__nrc_find_user(urlp, nrc_exact))
354 goto j_user;
355
356 if (nrc_wild != NULL && nrc_wild->nrc_result != NULL)
357 goto jleave;
358 if (!__nrc_find_user(urlp, nrc_wild))
359 goto jleave;
360 j_user:
361 ;
362 }
363
364 if (__nrc_find_pass(urlp, TRU1, nrc_exact) ||
365 __nrc_find_pass(urlp, TRU1, nrc_wild) ||
366 /* Do not try to find a password without exact user match unless we've
367 * been called during credential lookup, a.k.a. the second time */
368 !only_pass ||
369 __nrc_find_pass(urlp, FAL0, nrc_exact) ||
370 __nrc_find_pass(urlp, FAL0, nrc_wild))
371 rv = TRU1;
372 jleave:
373 NYD_LEAVE;
374 return rv;
375 }
376
377 static int
378 __nrc_host_match(struct nrc_node const *nrc, struct url const *urlp)
379 {
380 char const *d2, *d1;
381 size_t l2, l1;
382 int rv = 0;
383 NYD2_ENTER;
384
385 /* Find a matching machine -- entries are all lowercase normalized */
386 if (nrc->nrc_mlen == urlp->url_host.l) {
387 if (LIKELY(!memcmp(nrc->nrc_dat, urlp->url_host.s, urlp->url_host.l)))
388 rv = 1;
389 goto jleave;
390 }
391
392 /* Cannot be an exact match, but maybe the .netrc machine starts with
393 * a "*." glob, which we recognize as an extension, meaning "skip
394 * a single subdomain, then match the rest" */
395 d1 = nrc->nrc_dat + 2;
396 l1 = nrc->nrc_mlen;
397 if (l1 <= 2 || d1[-1] != '.' || d1[-2] != '*')
398 goto jleave;
399 l1 -= 2;
400
401 /* Brute skipping over one subdomain, no RFC 1035 or RFC 1122 checks;
402 * in fact this even succeeds for ".host.com", but - why care, here? */
403 d2 = urlp->url_host.s;
404 l2 = urlp->url_host.l;
405 while (l2 > 0) {
406 --l2;
407 if (*d2++ == '.')
408 break;
409 }
410
411 if (l2 == l1 && !memcmp(d1, d2, l1))
412 /* This matches, but we won't use it directly but watch out for an
413 * exact match first! */
414 rv = -1;
415 jleave:
416 NYD2_LEAVE;
417 return rv;
418 }
419
420 static bool_t
421 __nrc_find_user(struct url *urlp, struct nrc_node const *nrc)
422 {
423 NYD2_ENTER;
424
425 for (; nrc != NULL; nrc = nrc->nrc_result)
426 if (nrc->nrc_ulen > 0) {
427 /* Fake it was part of URL otherwise XXX */
428 urlp->url_had_user = TRU1;
429 /* That buffer will be duplicated by url_parse() in this case! */
430 urlp->url_user.s = UNCONST(nrc->nrc_dat + nrc->nrc_mlen +1);
431 urlp->url_user.l = nrc->nrc_ulen;
432 break;
433 }
434
435 NYD2_LEAVE;
436 return (nrc != NULL);
437 }
438
439 static bool_t
440 __nrc_find_pass(struct url *urlp, bool_t user_match, struct nrc_node const *nrc)
441 {
442 NYD2_ENTER;
443
444 for (; nrc != NULL; nrc = nrc->nrc_result) {
445 bool_t um = (nrc->nrc_ulen == urlp->url_user.l &&
446 !memcmp(nrc->nrc_dat + nrc->nrc_mlen +1, urlp->url_user.s,
447 urlp->url_user.l));
448
449 if (user_match) {
450 if (!um)
451 continue;
452 } else if (!um && nrc->nrc_ulen > 0)
453 continue;
454 if (nrc->nrc_plen == 0)
455 continue;
456
457 /* We are responsible for duplicating this buffer! */
458 urlp->url_pass.s = savestrbuf(nrc->nrc_dat + nrc->nrc_mlen +1 +
459 nrc->nrc_ulen + 1, (urlp->url_pass.l = nrc->nrc_plen));
460 break;
461 }
462
463 NYD2_LEAVE;
464 return (nrc != NULL);
465 }
466 #endif /* HAVE_NETRC */
467
468 #ifdef HAVE_AGENT
469 static bool_t
470 _agent_shell_lookup(struct url *urlp, char const *comm)
471 {
472 char buf[128];
473 char const *env_addon[8];
474 struct str s;
475 FILE *pbuf;
476 union {char const *cp; int c; sighandler_type sht;} u;
477 size_t cl, l;
478 bool_t rv = FAL0;
479 NYD2_ENTER;
480
481 env_addon[0] = str_concat_csvl(&s, AGENT_USER, "=", urlp->url_user.s,
482 NULL)->s;
483 env_addon[1] = str_concat_csvl(&s, AGENT_USER_ENC, "=", urlp->url_user_enc.s,
484 NULL)->s;
485 env_addon[2] = str_concat_csvl(&s, AGENT_HOST, "=", urlp->url_host.s,
486 NULL)->s;
487 env_addon[3] = str_concat_csvl(&s, AGENT_HOST_PORT, "=", urlp->url_h_p.s,
488 NULL)->s;
489
490 env_addon[4] = str_concat_csvl(&s, NAILENV_TMPDIR, "=", tempdir, NULL)->s;
491 env_addon[5] = str_concat_csvl(&s, "TMPDIR", "=", tempdir, NULL)->s;
492
493 env_addon[6] = NULL;
494
495 if ((u.cp = ok_vlook(SHELL)) == NULL)
496 u.cp = XSHELL;
497 if ((pbuf = Popen(comm, "r", u.cp, env_addon, -1)) == NULL) {
498 n_err(_("*agent-shell-lookup* startup failed (`%s')\n"), comm);
499 goto jleave;
500 }
501
502 for (s.s = NULL, s.l = cl = l = 0; (u.c = getc(pbuf)) != EOF; ++cl) {
503 if (u.c == '\n') /* xxx */
504 continue;
505 buf[l++] = u.c;
506 if (l == sizeof(buf) - 1) {
507 n_str_add_buf(&s, buf, l);
508 l = 0;
509 }
510 }
511 if (l > 0)
512 n_str_add_buf(&s, buf, l);
513
514 if (!Pclose(pbuf, TRU1)) {
515 if (options & OPT_D_V)
516 n_err(_("*agent-shell-lookup* execution failure (`%s')\n"), comm);
517 goto jleave;
518 }
519
520 /* We are responsible for duplicating this buffer! */
521 if (s.s != NULL)
522 urlp->url_pass.s = savestrbuf(s.s, urlp->url_pass.l = s.l);
523 else if (cl > 0)
524 urlp->url_pass.s = UNCONST(""), urlp->url_pass.l = 0;
525 rv = TRU1;
526 jleave:
527 if (s.s != NULL)
528 free(s.s);
529 NYD2_LEAVE;
530 return rv;
531 }
532 #endif
533
534 FL char *
535 (urlxenc)(char const *cp, bool_t ispath SALLOC_DEBUG_ARGS)
536 {
537 char *n, *np, c1;
538 NYD2_ENTER;
539
540 np = n = (salloc)(strlen(cp) * 3 +1 SALLOC_DEBUG_ARGSCALL);
541
542 for (; (c1 = *cp) != '\0'; ++cp) {
543 /* (RFC 1738) RFC 3986, 2.3 Unreserved Characters:
544 * ALPHA / DIGIT / "-" / "." / "_" / "~"
545 * However add a special is[file]path mode for file-system friendliness */
546 if (alnumchar(c1) || c1 == '_')
547 *np++ = c1;
548 else if (!ispath) {
549 if (c1 != '-' && c1 != '.' && c1 != '~')
550 goto jesc;
551 *np++ = c1;
552 } else if (PTRCMP(np, >, n) && (*cp == '-' || *cp == '.')) /* XXX imap */
553 *np++ = c1;
554 else {
555 jesc:
556 np[0] = '%';
557 mime_char_to_hexseq(np + 1, c1);
558 np += 3;
559 }
560 }
561 *np = '\0';
562 NYD2_LEAVE;
563 return n;
564 }
565
566 FL char *
567 (urlxdec)(char const *cp SALLOC_DEBUG_ARGS)
568 {
569 char *n, *np;
570 si32_t c;
571 NYD2_ENTER;
572
573 np = n = (salloc)(strlen(cp) +1 SALLOC_DEBUG_ARGSCALL);
574
575 while ((c = (uc_i)*cp++) != '\0') {
576 if (c == '%' && cp[0] != '\0' && cp[1] != '\0') {
577 si32_t o = c;
578 if (LIKELY((c = mime_hexseq_to_char(cp)) >= '\0'))
579 cp += 2;
580 else
581 c = o;
582 }
583 *np++ = (char)c;
584 }
585 *np = '\0';
586 NYD2_LEAVE;
587 return n;
588 }
589
590 FL char *
591 url_mailto_to_address(char const *mailtop){ /* TODO hack! RFC 6068; factory? */
592 size_t i;
593 char *rv;
594 char const *mailtop_orig;
595 NYD_ENTER;
596
597 if(!is_prefix("mailto:", mailtop_orig = mailtop)){
598 rv = NULL;
599 goto jleave;
600 }
601 mailtop += sizeof("mailto:") -1;
602
603 /* TODO This is all intermediate, and for now just enough to understand
604 * TODO a little bit of a little more advanced List-Post: headers. */
605 /* Strip any hfield additions, keep only to addr-spec's */
606 if((rv = strchr(mailtop, '?')) != NULL)
607 rv = savestrbuf(mailtop, i = PTR2SIZE(rv - mailtop));
608 else
609 rv = savestrbuf(mailtop, i = strlen(mailtop));
610
611 i = strlen(rv);
612
613 /* Simply perform percent-decoding if there is a percent % */
614 if(memchr(rv, '%', i) != NULL){
615 char *rv_base;
616 bool_t err;
617
618 for(err = FAL0, mailtop = rv_base = rv; i > 0;){
619 char c;
620
621 if((c = *mailtop++) == '%'){
622 si32_t cc;
623
624 if(i < 3 || (cc = mime_hexseq_to_char(mailtop)) < 0){
625 if(!err && (err = TRU1, options & OPT_D_V))
626 n_err(_("Invalid RFC 6068 'mailto' URL: %s\n"), mailtop_orig);
627 goto jhex_putc;
628 }
629 *rv++ = (char)cc;
630 mailtop += 2;
631 i -= 3;
632 }else{
633 jhex_putc:
634 *rv++ = c;
635 --i;
636 }
637 }
638 *rv = '\0';
639 rv = rv_base;
640 }
641 jleave:
642 NYD_LEAVE;
643 return rv;
644 }
645
646 #ifdef HAVE_SOCKETS /* Note: not indented for that -- later: file:// etc.! */
647 FL char const *
648 url_servbyname(struct url const *urlp, ui16_t *irv_or_null)
649 {
650 static struct {
651 char const name[14];
652 char const port[8];
653 ui16_t portno;
654 } const tbl[] = {
655 { "smtp", "25", 25},
656 { "submission", "587", 587},
657 { "smtps", "465", 465},
658 { "pop3", "110", 110},
659 { "pop3s", "995", 995},
660 { "imap", "143", 143},
661 { "imaps", "993", 993}
662 };
663 char const *rv;
664 size_t i;
665 NYD_ENTER;
666
667 for (rv = NULL, i = 0; i < NELEM(tbl); ++i)
668 if (!asccasecmp(tbl[i].name, urlp->url_proto)) {
669 rv = tbl[i].port;
670 if (irv_or_null != NULL)
671 *irv_or_null = tbl[i].portno;
672 break;
673 }
674 NYD_LEAVE;
675 return rv;
676 }
677
678 FL bool_t
679 url_parse(struct url *urlp, enum cproto cproto, char const *data)
680 {
681 #if defined HAVE_SMTP && defined HAVE_POP3 && defined HAVE_IMAP
682 # define __ALLPROTO
683 #endif
684 #if defined HAVE_SMTP || defined HAVE_POP3 || defined HAVE_IMAP
685 # define __ANYPROTO
686 char *cp, *x;
687 #endif
688 bool_t rv = FAL0;
689 NYD_ENTER;
690 UNUSED(data);
691
692 memset(urlp, 0, sizeof *urlp);
693 urlp->url_input = data;
694 urlp->url_cproto = cproto;
695
696 /* Network protocol */
697 #define _protox(X,Y) \
698 urlp->url_portno = Y;\
699 memcpy(urlp->url_proto, X "://", sizeof(X "://"));\
700 urlp->url_proto[sizeof(X) -1] = '\0';\
701 urlp->url_proto_len = sizeof(X) -1;\
702 urlp->url_proto_xlen = sizeof(X "://") -1
703 #define __if(X,Y,Z) \
704 if (!ascncasecmp(data, X "://", sizeof(X "://") -1)) {\
705 _protox(X, Y);\
706 data += sizeof(X "://") -1;\
707 do { Z; } while (0);\
708 goto juser;\
709 }
710 #define _if(X,Y) __if(X, Y, (void)0)
711 #ifdef HAVE_SSL
712 # define _ifs(X,Y) __if(X, Y, urlp->url_needs_tls = TRU1)
713 #else
714 # define _ifs(X,Y) goto jeproto;
715 #endif
716
717 switch (cproto) {
718 case CPROTO_SMTP:
719 #ifdef HAVE_SMTP
720 _if ("smtp", 25)
721 _if ("submission", 587)
722 _ifs ("smtps", 465)
723 _protox("smtp", 25);
724 break;
725 #else
726 goto jeproto;
727 #endif
728 case CPROTO_POP3:
729 #ifdef HAVE_POP3
730 _if ("pop3", 110)
731 _ifs ("pop3s", 995)
732 _protox("pop3", 110);
733 break;
734 #else
735 goto jeproto;
736 #endif
737 case CPROTO_IMAP:
738 #ifdef HAVE_IMAP
739 _if ("imap", 143)
740 _ifs ("imaps", 993)
741 _protox("imap", 143);
742 break;
743 #else
744 goto jeproto;
745 #endif
746 }
747
748 #undef _ifs
749 #undef _if
750 #undef __if
751 #undef _protox
752
753 if (strstr(data, "://") != NULL) {
754 #if !defined __ALLPROTO || !defined HAVE_SSL
755 jeproto:
756 #endif
757 n_err(_("URL \"proto://\" prefix invalid: \"%s\"\n"), urlp->url_input);
758 goto jleave;
759 }
760 #ifdef __ANYPROTO
761
762 /* User and password, I */
763 juser:
764 if ((cp = _url_last_at_before_slash(data)) != NULL) {
765 size_t l = PTR2SIZE(cp - data);
766 char const *d = data;
767 char *ub = ac_alloc(l +1);
768
769 urlp->url_had_user = TRU1;
770 data = cp + 1;
771
772 /* And also have a password? */
773 if ((cp = memchr(d, ':', l)) != NULL) {
774 size_t i = PTR2SIZE(cp - d);
775
776 l -= i + 1;
777 memcpy(ub, cp + 1, l);
778 ub[l] = '\0';
779 urlp->url_pass.l = strlen(urlp->url_pass.s = urlxdec(ub));
780
781 if (strcmp(ub, urlxenc(urlp->url_pass.s, FAL0))) {
782 n_err(_("String is not properly URL percent encoded: \"%s\"\n"),
783 ub);
784 goto jleave;
785 }
786 l = i;
787 }
788
789 memcpy(ub, d, l);
790 ub[l] = '\0';
791 urlp->url_user.l = strlen(urlp->url_user.s = urlxdec(ub));
792 urlp->url_user_enc.l = strlen(
793 urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0));
794
795 if (urlp->url_user_enc.l != l || memcmp(urlp->url_user_enc.s, ub, l)) {
796 n_err(_("String is not properly URL percent encoded: \"%s\"\n"), ub);
797 goto jleave;
798 }
799
800 ac_free(ub);
801 }
802
803 /* Servername and port -- and possible path suffix */
804 if ((cp = strchr(data, ':')) != NULL) { /* TODO URL parse, IPv6 support */
805 char *eptr;
806 long l;
807
808 urlp->url_port = x = savestr(x = &cp[1]);
809 if ((x = strchr(x, '/')) != NULL) {
810 *x = '\0';
811 while(*++x == '/')
812 ;
813 }
814 l = strtol(urlp->url_port, &eptr, 10);
815 if (*eptr != '\0' || l <= 0 || UICMP(32, l, >=, 0xFFFFu)) {
816 n_err(_("URL with invalid port number: \"%s\"\n"), urlp->url_input);
817 goto jleave;
818 }
819 urlp->url_portno = (ui16_t)l;
820 } else {
821 if ((x = strchr(data, '/')) != NULL) {
822 data = savestrbuf(data, PTR2SIZE(x - data));
823 while(*++x == '/')
824 ;
825 }
826 cp = UNCONST(data + strlen(data));
827 }
828
829 /* A (non-empty) path may only occur with IMAP */
830 if (x != NULL && *x) {
831 /* Take care not to count adjacent slashes for real, on either end */
832 char *x2;
833 size_t i;
834
835 for(x2 = savestrbuf(x, i = strlen(x)); i > 0; --i)
836 if(x2[i - 1] != '/')
837 break;
838 x2[i] = '\0';
839
840 if (i > 0) {
841 if (cproto != CPROTO_IMAP) {
842 n_err(_("URL protocol doesn't support paths: \"%s\"\n"),
843 urlp->url_input);
844 goto jleave;
845 }
846 urlp->url_path.l = i;
847 urlp->url_path.s = x2;
848 }
849 }
850
851 urlp->url_host.s = savestrbuf(data, urlp->url_host.l = PTR2SIZE(cp - data));
852 { size_t i;
853 for (cp = urlp->url_host.s, i = urlp->url_host.l; i != 0; ++cp, --i)
854 *cp = lowerconv(*cp);
855 }
856
857 /* .url_h_p: HOST:PORT */
858 { size_t i;
859 struct str *s = &urlp->url_h_p;
860
861 s->s = salloc(urlp->url_host.l + 1 + sizeof("65536")-1 +1);
862 memcpy(s->s, urlp->url_host.s, i = urlp->url_host.l);
863 if (urlp->url_port != NULL) {
864 size_t j = strlen(urlp->url_port);
865 s->s[i++] = ':';
866 memcpy(s->s + i, urlp->url_port, j);
867 i += j;
868 }
869 s->s[i] = '\0';
870 s->l = i;
871 }
872
873 /* User, II
874 * If there was no user in the URL, do we have *user-HOST* or *user*? */
875 if (!urlp->url_had_user) {
876 if ((urlp->url_user.s = xok_vlook(user, urlp, OXM_PLAIN | OXM_H_P))
877 == NULL) {
878 /* No, check wether .netrc lookup is desired */
879 # ifdef HAVE_NETRC
880 if (!ok_blook(v15_compat) ||
881 !xok_blook(netrc_lookup, urlp, OXM_PLAIN | OXM_H_P) ||
882 !_nrc_lookup(urlp, FAL0))
883 # endif
884 urlp->url_user.s = UNCONST(myname);
885 }
886
887 urlp->url_user.l = strlen(urlp->url_user.s);
888 urlp->url_user.s = savestrbuf(urlp->url_user.s, urlp->url_user.l);
889 urlp->url_user_enc.l = strlen(
890 urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0));
891 }
892
893 /* And then there are a lot of prebuild string combinations TODO do lazy */
894
895 /* .url_u_h: .url_user@.url_host
896 * For SMTP we apply ridiculously complicated *v15-compat* plus
897 * *smtp-hostname* / *hostname* dependent rules */
898 { struct str h, *s;
899 size_t i;
900
901 if (cproto == CPROTO_SMTP && ok_blook(v15_compat) &&
902 (cp = ok_vlook(smtp_hostname)) != NULL) {
903 if (*cp == '\0')
904 cp = nodename(1);
905 h.s = savestrbuf(cp, h.l = strlen(cp));
906 } else
907 h = urlp->url_host;
908
909 s = &urlp->url_u_h;
910 i = urlp->url_user.l;
911
912 s->s = salloc(i + 1 + h.l +1);
913 if (i > 0) {
914 memcpy(s->s, urlp->url_user.s, i);
915 s->s[i++] = '@';
916 }
917 memcpy(s->s + i, h.s, h.l +1);
918 i += h.l;
919 s->l = i;
920 }
921
922 /* .url_u_h_p: .url_user@.url_host[:.url_port] */
923 { struct str *s = &urlp->url_u_h_p;
924 size_t i = urlp->url_user.l;
925
926 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
927 if (i > 0) {
928 memcpy(s->s, urlp->url_user.s, i);
929 s->s[i++] = '@';
930 }
931 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
932 i += urlp->url_h_p.l;
933 s->l = i;
934 }
935
936 /* .url_eu_h_p: .url_user_enc@.url_host[:.url_port] */
937 { struct str *s = &urlp->url_eu_h_p;
938 size_t i = urlp->url_user_enc.l;
939
940 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
941 if (i > 0) {
942 memcpy(s->s, urlp->url_user_enc.s, i);
943 s->s[i++] = '@';
944 }
945 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
946 i += urlp->url_h_p.l;
947 s->l = i;
948 }
949
950 /* .url_p_u_h_p: .url_proto://.url_u_h_p */
951 { size_t i;
952 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_u_h_p.l) +1);
953
954 urlp->url_proto[urlp->url_proto_len] = ':';
955 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_u_h_p.s,
956 urlp->url_u_h_p.l +1);
957 urlp->url_proto[urlp->url_proto_len] = '\0';
958
959 urlp->url_p_u_h_p = ud;
960 }
961
962 /* .url_p_eu_h_p, .url_p_eu_h_p_p: .url_proto://.url_eu_h_p[/.url_path] */
963 { size_t i;
964 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_eu_h_p.l) +
965 1 + urlp->url_path.l +1);
966
967 urlp->url_proto[urlp->url_proto_len] = ':';
968 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_eu_h_p.s,
969 urlp->url_eu_h_p.l +1);
970 urlp->url_proto[urlp->url_proto_len] = '\0';
971
972 if (urlp->url_path.l == 0)
973 urlp->url_p_eu_h_p = urlp->url_p_eu_h_p_p = ud;
974 else {
975 urlp->url_p_eu_h_p = savestrbuf(ud, i);
976 urlp->url_p_eu_h_p_p = ud;
977 ud += i;
978 *ud++ = '/';
979 memcpy(ud, urlp->url_path.s, urlp->url_path.l +1);
980 }
981 }
982
983 rv = TRU1;
984 #endif /* __ANYPROTO */
985 jleave:
986 NYD_LEAVE;
987 return rv;
988 #undef __ANYPROTO
989 #undef __ALLPROTO
990 }
991
992 FL bool_t
993 ccred_lookup_old(struct ccred *ccp, enum cproto cproto, char const *addr)
994 {
995 char const *pname, *pxstr, *authdef;
996 size_t pxlen, addrlen, i;
997 char *vbuf, *s;
998 ui8_t authmask;
999 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1000 ware = NONE;
1001 bool_t addr_is_nuser = FAL0; /* XXX v15.0 legacy! v15_compat */
1002 NYD_ENTER;
1003
1004 memset(ccp, 0, sizeof *ccp);
1005
1006 switch (cproto) {
1007 default:
1008 case CPROTO_SMTP:
1009 pname = "SMTP";
1010 pxstr = "smtp-auth";
1011 pxlen = sizeof("smtp-auth") -1;
1012 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1013 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1014 authdef = "none";
1015 addr_is_nuser = TRU1;
1016 break;
1017 case CPROTO_POP3:
1018 pname = "POP3";
1019 pxstr = "pop3-auth";
1020 pxlen = sizeof("pop3-auth") -1;
1021 authmask = AUTHTYPE_PLAIN;
1022 authdef = "plain";
1023 break;
1024 case CPROTO_IMAP:
1025 pname = "IMAP";
1026 pxstr = "imap-auth";
1027 pxlen = sizeof("imap-auth") -1;
1028 authmask = AUTHTYPE_LOGIN | AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1029 authdef = "login";
1030 break;
1031 }
1032
1033 ccp->cc_cproto = cproto;
1034 addrlen = strlen(addr);
1035 vbuf = ac_alloc(pxlen + addrlen + sizeof("-password-")-1 +1);
1036 memcpy(vbuf, pxstr, pxlen);
1037
1038 /* Authentication type */
1039 vbuf[pxlen] = '-';
1040 memcpy(vbuf + pxlen + 1, addr, addrlen +1);
1041 if ((s = vok_vlook(vbuf)) == NULL) {
1042 vbuf[pxlen] = '\0';
1043 if ((s = vok_vlook(vbuf)) == NULL)
1044 s = UNCONST(authdef);
1045 }
1046
1047 if (!asccasecmp(s, "none")) {
1048 ccp->cc_auth = "NONE";
1049 ccp->cc_authtype = AUTHTYPE_NONE;
1050 /*ware = NONE;*/
1051 } else if (!asccasecmp(s, "plain")) {
1052 ccp->cc_auth = "PLAIN";
1053 ccp->cc_authtype = AUTHTYPE_PLAIN;
1054 ware = REQ_PASS | REQ_USER;
1055 } else if (!asccasecmp(s, "login")) {
1056 ccp->cc_auth = "LOGIN";
1057 ccp->cc_authtype = AUTHTYPE_LOGIN;
1058 ware = REQ_PASS | REQ_USER;
1059 } else if (!asccasecmp(s, "cram-md5")) {
1060 ccp->cc_auth = "CRAM-MD5";
1061 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1062 ware = REQ_PASS | REQ_USER;
1063 } else if (!asccasecmp(s, "gssapi")) {
1064 ccp->cc_auth = "GSS-API";
1065 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1066 ware = REQ_USER;
1067 } /* no else */
1068
1069 /* Verify method */
1070 if (!(ccp->cc_authtype & authmask)) {
1071 n_err(_("Unsupported %s authentication method: %s\n"), pname, s);
1072 ccp = NULL;
1073 goto jleave;
1074 }
1075 # ifndef HAVE_MD5
1076 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1077 n_err(_("No CRAM-MD5 support compiled in\n"));
1078 ccp = NULL;
1079 goto jleave;
1080 }
1081 # endif
1082 # ifndef HAVE_GSSAPI
1083 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1084 n_err(_("No GSS-API support compiled in\n"));
1085 ccp = NULL;
1086 goto jleave;
1087 }
1088 # endif
1089
1090 /* User name */
1091 if (!(ware & (WANT_USER | REQ_USER)))
1092 goto jpass;
1093
1094 if (!addr_is_nuser) {
1095 if ((s = _url_last_at_before_slash(addr)) != NULL) {
1096 ccp->cc_user.s = urlxdec(savestrbuf(addr, PTR2SIZE(s - addr)));
1097 ccp->cc_user.l = strlen(ccp->cc_user.s);
1098 } else if (ware & REQ_USER)
1099 goto jgetuser;
1100 goto jpass;
1101 }
1102
1103 memcpy(vbuf + pxlen, "-user-", i = sizeof("-user-") -1);
1104 i += pxlen;
1105 memcpy(vbuf + i, addr, addrlen +1);
1106 if ((s = vok_vlook(vbuf)) == NULL) {
1107 vbuf[--i] = '\0';
1108 if ((s = vok_vlook(vbuf)) == NULL && (ware & REQ_USER)) {
1109 if ((s = getuser(NULL)) == NULL) {
1110 jgetuser: /* TODO v15.0: today we simply bail, but we should call getuser().
1111 * TODO even better: introduce "PROTO-user" and "PROTO-pass" and
1112 * TODO check that first, then! change control flow, grow vbuf */
1113 n_err(_("A user is necessary for %s authentication\n"), pname);
1114 ccp = NULL;
1115 goto jleave;
1116 }
1117 }
1118 }
1119 ccp->cc_user.l = strlen(ccp->cc_user.s = savestr(s));
1120
1121 /* Password */
1122 jpass:
1123 if (!(ware & (WANT_PASS | REQ_PASS)))
1124 goto jleave;
1125
1126 if (!addr_is_nuser) {
1127 memcpy(vbuf, "password-", i = sizeof("password-") -1);
1128 } else {
1129 memcpy(vbuf + pxlen, "-password-", i = sizeof("-password-") -1);
1130 i += pxlen;
1131 }
1132 memcpy(vbuf + i, addr, addrlen +1);
1133 if ((s = vok_vlook(vbuf)) == NULL) {
1134 vbuf[--i] = '\0';
1135 if ((!addr_is_nuser || (s = vok_vlook(vbuf)) == NULL) &&
1136 (ware & REQ_PASS)) {
1137 if ((s = getpassword(NULL)) == NULL) {
1138 n_err(_("A password is necessary for %s authentication\n"),
1139 pname);
1140 ccp = NULL;
1141 goto jleave;
1142 }
1143 }
1144 }
1145 if (s != NULL)
1146 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1147
1148 jleave:
1149 ac_free(vbuf);
1150 if (ccp != NULL && (options & OPT_D_VV))
1151 n_err(_("Credentials: host \"%s\", user \"%s\", pass \"%s\"\n"),
1152 addr, (ccp->cc_user.s != NULL ? ccp->cc_user.s : ""),
1153 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : ""));
1154 NYD_LEAVE;
1155 return (ccp != NULL);
1156 }
1157
1158 FL bool_t
1159 ccred_lookup(struct ccred *ccp, struct url *urlp)
1160 {
1161 char const *pstr, *authdef;
1162 char *s;
1163 enum okeys authokey;
1164 ui8_t authmask;
1165 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1166 ware = NONE;
1167 NYD_ENTER;
1168
1169 memset(ccp, 0, sizeof *ccp);
1170 ccp->cc_user = urlp->url_user;
1171
1172 switch ((ccp->cc_cproto = urlp->url_cproto)) {
1173 default:
1174 case CPROTO_SMTP:
1175 pstr = "smtp";
1176 authokey = ok_v_smtp_auth;
1177 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1178 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1179 authdef = "plain";
1180 break;
1181 case CPROTO_POP3:
1182 pstr = "pop3";
1183 authokey = ok_v_pop3_auth;
1184 authmask = AUTHTYPE_PLAIN;
1185 authdef = "plain";
1186 break;
1187 case CPROTO_IMAP:
1188 pstr = "imap";
1189 authokey = ok_v_imap_auth;
1190 authmask = AUTHTYPE_LOGIN | AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1191 authdef = "login";
1192 break;
1193 }
1194
1195 /* Authentication type */
1196 if ((s = xok_VLOOK(authokey, urlp, OXM_ALL)) == NULL)
1197 s = UNCONST(authdef);
1198
1199 if (!asccasecmp(s, "none")) {
1200 ccp->cc_auth = "NONE";
1201 ccp->cc_authtype = AUTHTYPE_NONE;
1202 /*ware = NONE;*/
1203 } else if (!asccasecmp(s, "plain")) {
1204 ccp->cc_auth = "PLAIN";
1205 ccp->cc_authtype = AUTHTYPE_PLAIN;
1206 ware = REQ_PASS | REQ_USER;
1207 } else if (!asccasecmp(s, "login")) {
1208 ccp->cc_auth = "LOGIN";
1209 ccp->cc_authtype = AUTHTYPE_LOGIN;
1210 ware = REQ_PASS | REQ_USER;
1211 } else if (!asccasecmp(s, "cram-md5")) {
1212 ccp->cc_auth = "CRAM-MD5";
1213 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1214 ware = REQ_PASS | REQ_USER;
1215 } else if (!asccasecmp(s, "gssapi")) {
1216 ccp->cc_auth = "GSS-API";
1217 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1218 ware = REQ_USER;
1219 } /* no else */
1220
1221 /* Verify method */
1222 if (!(ccp->cc_authtype & authmask)) {
1223 n_err(_("Unsupported %s authentication method: %s\n"), pstr, s);
1224 ccp = NULL;
1225 goto jleave;
1226 }
1227 # ifndef HAVE_MD5
1228 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1229 n_err(_("No CRAM-MD5 support compiled in\n"));
1230 ccp = NULL;
1231 goto jleave;
1232 }
1233 # endif
1234 # ifndef HAVE_GSSAPI
1235 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1236 n_err(_("No GSS-API support compiled in\n"));
1237 ccp = NULL;
1238 goto jleave;
1239 }
1240 # endif
1241
1242 /* Password */
1243 ccp->cc_pass = urlp->url_pass;
1244 if (ccp->cc_pass.s != NULL)
1245 goto jleave;
1246
1247 if ((s = xok_vlook(password, urlp, OXM_ALL)) != NULL)
1248 goto js2pass;
1249 # ifdef HAVE_AGENT
1250 if ((s = xok_vlook(agent_shell_lookup, urlp, OXM_ALL)) != NULL) {
1251 if (!_agent_shell_lookup(urlp, s)) {
1252 ccp = NULL;
1253 goto jleave;
1254 } else if (urlp->url_pass.s != NULL) {
1255 ccp->cc_pass = urlp->url_pass;
1256 goto jleave;
1257 }
1258 }
1259 # endif
1260 # ifdef HAVE_NETRC
1261 if (xok_blook(netrc_lookup, urlp, OXM_ALL) && _nrc_lookup(urlp, TRU1)) {
1262 ccp->cc_pass = urlp->url_pass;
1263 goto jleave;
1264 }
1265 # endif
1266 if (ware & REQ_PASS) {
1267 if ((s = getpassword(NULL)) != NULL)
1268 js2pass:
1269 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1270 else {
1271 n_err(_("A password is necessary for %s authentication\n"), pstr);
1272 ccp = NULL;
1273 }
1274 }
1275
1276 jleave:
1277 if (ccp != NULL && (options & OPT_D_VV))
1278 n_err(_("Credentials: host \"%s\", user \"%s\", pass \"%s\"\n"),
1279 urlp->url_h_p.s, (ccp->cc_user.s != NULL ? ccp->cc_user.s : ""),
1280 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : ""));
1281 NYD_LEAVE;
1282 return (ccp != NULL);
1283 }
1284 #endif /* HAVE_SOCKETS */
1285
1286 #ifdef HAVE_NETRC
1287 FL int
1288 c_netrc(void *v)
1289 {
1290 char **argv = v;
1291 struct nrc_node *nrc;
1292 NYD_ENTER;
1293
1294 if (*argv == NULL)
1295 goto jlist;
1296 if (argv[1] != NULL)
1297 goto jerr;
1298 if (!asccasecmp(*argv, "show"))
1299 goto jlist;
1300 if (!asccasecmp(*argv, "clear"))
1301 goto jclear;
1302 jerr:
1303 n_err(_("Synopsis: netrc: (<show> or) <clear> the .netrc cache\n"));
1304 v = NULL;
1305 jleave:
1306 NYD_LEAVE;
1307 return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
1308
1309 jlist: {
1310 FILE *fp;
1311 size_t l;
1312
1313 if (_nrc_list == NULL)
1314 _nrc_init();
1315 if (_nrc_list == NRC_NODE_ERR) {
1316 n_err(_("Interpolate what file?\n"));
1317 v = NULL;
1318 goto jleave;
1319 }
1320
1321 if ((fp = Ftmp(NULL, "netrc", OF_RDWR | OF_UNLINK | OF_REGISTER, 0600)
1322 ) == NULL) {
1323 n_perr(_("tmpfile"), 0);
1324 v = NULL;
1325 goto jleave;
1326 }
1327
1328 for (l = 0, nrc = _nrc_list; nrc != NULL; ++l, nrc = nrc->nrc_next) {
1329 fprintf(fp, _("machine %s "), nrc->nrc_dat);
1330 if (nrc->nrc_ulen > 0)
1331 fprintf(fp, _("login \"%s\" "),
1332 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1));
1333 if (nrc->nrc_plen > 0)
1334 fprintf(fp, _("password \"%s\"\n"),
1335 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1 + nrc->nrc_ulen +1));
1336 else
1337 putc('\n', fp);
1338 }
1339
1340 page_or_print(fp, l);
1341 Fclose(fp);
1342 }
1343 goto jleave;
1344
1345 jclear:
1346 if (_nrc_list == NRC_NODE_ERR)
1347 _nrc_list = NULL;
1348 while ((nrc = _nrc_list) != NULL) {
1349 _nrc_list = nrc->nrc_next;
1350 free(nrc);
1351 }
1352 goto jleave;
1353 }
1354 #endif /* HAVE_NETRC */
1355
1356 #ifdef HAVE_MD5
1357 FL char *
1358 md5tohex(char hex[MD5TOHEX_SIZE], void const *vp)
1359 {
1360 char const *cp = vp;
1361 size_t i, j;
1362 NYD_ENTER;
1363
1364 for (i = 0; i < MD5TOHEX_SIZE / 2; ++i) {
1365 j = i << 1;
1366 # define __hex(n) ((n) > 9 ? (n) - 10 + 'a' : (n) + '0')
1367 hex[j] = __hex((cp[i] & 0xF0) >> 4);
1368 hex[++j] = __hex(cp[i] & 0x0F);
1369 # undef __hex
1370 }
1371 NYD_LEAVE;
1372 return hex;
1373 }
1374
1375 FL char *
1376 cram_md5_string(struct str const *user, struct str const *pass,
1377 char const *b64)
1378 {
1379 struct str in, out;
1380 char digest[16], *cp;
1381 NYD_ENTER;
1382
1383 out.s = NULL;
1384 in.s = UNCONST(b64);
1385 in.l = strlen(in.s);
1386 b64_decode(&out, &in, NULL);
1387 assert(out.s != NULL);
1388
1389 hmac_md5((uc_i*)out.s, out.l, (uc_i*)pass->s, pass->l, digest);
1390 free(out.s);
1391 cp = md5tohex(salloc(MD5TOHEX_SIZE +1), digest);
1392
1393 in.l = user->l + MD5TOHEX_SIZE +1;
1394 in.s = ac_alloc(user->l + 1 + MD5TOHEX_SIZE +1);
1395 memcpy(in.s, user->s, user->l);
1396 in.s[user->l] = ' ';
1397 memcpy(in.s + user->l + 1, cp, MD5TOHEX_SIZE);
1398 b64_encode(&out, &in, B64_SALLOC | B64_CRLF);
1399 ac_free(in.s);
1400 NYD_LEAVE;
1401 return out.s;
1402 }
1403
1404 FL void
1405 hmac_md5(unsigned char *text, int text_len, unsigned char *key, int key_len,
1406 void *digest)
1407 {
1408 /*
1409 * This code is taken from
1410 *
1411 * Network Working Group H. Krawczyk
1412 * Request for Comments: 2104 IBM
1413 * Category: Informational M. Bellare
1414 * UCSD
1415 * R. Canetti
1416 * IBM
1417 * February 1997
1418 *
1419 *
1420 * HMAC: Keyed-Hashing for Message Authentication
1421 */
1422 md5_ctx context;
1423 unsigned char k_ipad[65]; /* inner padding - key XORd with ipad */
1424 unsigned char k_opad[65]; /* outer padding - key XORd with opad */
1425 unsigned char tk[16];
1426 int i;
1427 NYD_ENTER;
1428
1429 /* if key is longer than 64 bytes reset it to key=MD5(key) */
1430 if (key_len > 64) {
1431 md5_ctx tctx;
1432
1433 md5_init(&tctx);
1434 md5_update(&tctx, key, key_len);
1435 md5_final(tk, &tctx);
1436
1437 key = tk;
1438 key_len = 16;
1439 }
1440
1441 /* the HMAC_MD5 transform looks like:
1442 *
1443 * MD5(K XOR opad, MD5(K XOR ipad, text))
1444 *
1445 * where K is an n byte key
1446 * ipad is the byte 0x36 repeated 64 times
1447 * opad is the byte 0x5c repeated 64 times
1448 * and text is the data being protected */
1449
1450 /* start out by storing key in pads */
1451 memset(k_ipad, 0, sizeof k_ipad);
1452 memset(k_opad, 0, sizeof k_opad);
1453 memcpy(k_ipad, key, key_len);
1454 memcpy(k_opad, key, key_len);
1455
1456 /* XOR key with ipad and opad values */
1457 for (i=0; i<64; i++) {
1458 k_ipad[i] ^= 0x36;
1459 k_opad[i] ^= 0x5c;
1460 }
1461
1462 /* perform inner MD5 */
1463 md5_init(&context); /* init context for 1st pass */
1464 md5_update(&context, k_ipad, 64); /* start with inner pad */
1465 md5_update(&context, text, text_len); /* then text of datagram */
1466 md5_final(digest, &context); /* finish up 1st pass */
1467
1468 /* perform outer MD5 */
1469 md5_init(&context); /* init context for 2nd pass */
1470 md5_update(&context, k_opad, 64); /* start with outer pad */
1471 md5_update(&context, digest, 16); /* then results of 1st hash */
1472 md5_final(digest, &context); /* finish up 2nd pass */
1473 NYD_LEAVE;
1474 }
1475 #endif /* HAVE_MD5 */
1476
1477 /* s-it-mode */
A mail processing system intended to provide the functionality of the POSIX mailx(1) command