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Actually do support MIME for all custom headers
[s-mailx.git] / urlcrecry.c
blobe2f2877b06eb77ecc8bb5c92fe302c00cdb3c1c3
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 #ifdef HAVE_SOCKETS /* Note: not indented for that -- later: file:// etc.! */
591 FL char const *
592 url_servbyname(struct url const *urlp, ui16_t *irv_or_null)
593 {
594 static struct {
595 char const name[14];
596 char const port[8];
597 ui16_t portno;
598 } const tbl[] = {
599 { "smtp", "25", 25},
600 { "submission", "587", 587},
601 { "smtps", "465", 465},
602 { "pop3", "110", 110},
603 { "pop3s", "995", 995},
604 { "imap", "143", 143},
605 { "imaps", "993", 993}
606 };
607 char const *rv;
608 size_t i;
609 NYD_ENTER;
610
611 for (rv = NULL, i = 0; i < NELEM(tbl); ++i)
612 if (!asccasecmp(tbl[i].name, urlp->url_proto)) {
613 rv = tbl[i].port;
614 if (irv_or_null != NULL)
615 *irv_or_null = tbl[i].portno;
616 break;
617 }
618 NYD_LEAVE;
619 return rv;
620 }
621
622 FL bool_t
623 url_parse(struct url *urlp, enum cproto cproto, char const *data)
624 {
625 #if defined HAVE_SMTP && defined HAVE_POP3
626 # define __ALLPROTO
627 #endif
628 #if defined HAVE_SMTP || defined HAVE_POP3
629 # define __ANYPROTO
630 char *cp, *x;
631 #endif
632 bool_t rv = FAL0;
633 NYD_ENTER;
634 UNUSED(data);
635
636 memset(urlp, 0, sizeof *urlp);
637 urlp->url_input = data;
638 urlp->url_cproto = cproto;
639
640 /* Network protocol */
641 #define _protox(X,Y) \
642 urlp->url_portno = Y;\
643 memcpy(urlp->url_proto, X "://", sizeof(X "://"));\
644 urlp->url_proto[sizeof(X) -1] = '\0';\
645 urlp->url_proto_len = sizeof(X) -1;\
646 urlp->url_proto_xlen = sizeof(X "://") -1
647 #define __if(X,Y,Z) \
648 if (!ascncasecmp(data, X "://", sizeof(X "://") -1)) {\
649 _protox(X, Y);\
650 data += sizeof(X "://") -1;\
651 do { Z; } while (0);\
652 goto juser;\
653 }
654 #define _if(X,Y) __if(X, Y, (void)0)
655 #ifdef HAVE_SSL
656 # define _ifs(X,Y) __if(X, Y, urlp->url_needs_tls = TRU1)
657 #else
658 # define _ifs(X,Y) goto jeproto;
659 #endif
660
661 switch (cproto) {
662 case CPROTO_SMTP:
663 #ifdef HAVE_SMTP
664 _if ("smtp", 25)
665 _if ("submission", 587)
666 _ifs ("smtps", 465)
667 _protox("smtp", 25);
668 break;
669 #else
670 goto jeproto;
671 #endif
672 case CPROTO_POP3:
673 #ifdef HAVE_POP3
674 _if ("pop3", 110)
675 _ifs ("pop3s", 995)
676 _protox("pop3", 110);
677 break;
678 #else
679 goto jeproto;
680 #endif
681 #if 0
682 case CPROTO_IMAP:
683 _if ("imap", 143)
684 _ifs ("imaps", 993)
685 _protox("imap", 143);
686 break;
687 goto jeproto;
688 #endif
689 }
690
691 #undef _ifs
692 #undef _if
693 #undef __if
694 #undef _protox
695
696 if (strstr(data, "://") != NULL) {
697 #if !defined __ALLPROTO || !defined HAVE_SSL
698 jeproto:
699 #endif
700 n_err(_("URL \"proto://\" prefix invalid: \"%s\"\n"), urlp->url_input);
701 goto jleave;
702 }
703 #ifdef __ANYPROTO
704
705 /* User and password, I */
706 juser:
707 if ((cp = _url_last_at_before_slash(data)) != NULL) {
708 size_t l = PTR2SIZE(cp - data);
709 char const *d = data;
710 char *ub = ac_alloc(l +1);
711
712 urlp->url_had_user = TRU1;
713 data = cp + 1;
714
715 /* And also have a password? */
716 if ((cp = memchr(d, ':', l)) != NULL) {
717 size_t i = PTR2SIZE(cp - d);
718
719 l -= i + 1;
720 memcpy(ub, cp + 1, l);
721 ub[l] = '\0';
722 urlp->url_pass.l = strlen(urlp->url_pass.s = urlxdec(ub));
723
724 if (strcmp(ub, urlxenc(urlp->url_pass.s, FAL0))) {
725 n_err(_("String is not properly URL percent encoded: \"%s\"\n"),
726 ub);
727 goto jleave;
728 }
729 l = i;
730 }
731
732 memcpy(ub, d, l);
733 ub[l] = '\0';
734 urlp->url_user.l = strlen(urlp->url_user.s = urlxdec(ub));
735 urlp->url_user_enc.l = strlen(
736 urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0));
737
738 if (urlp->url_user_enc.l != l || memcmp(urlp->url_user_enc.s, ub, l)) {
739 n_err(_("String is not properly URL percent encoded: \"%s\"\n"), ub);
740 goto jleave;
741 }
742
743 ac_free(ub);
744 }
745
746 /* Servername and port -- and possible path suffix */
747 if ((cp = strchr(data, ':')) != NULL) { /* TODO URL parse, IPv6 support */
748 char *eptr;
749 long l;
750
751 urlp->url_port = x = savestr(x = cp + 1);
752 if ((x = strchr(x, '/')) != NULL)
753 *x = '\0';
754 l = strtol(urlp->url_port, &eptr, 10);
755 if (*eptr != '\0' || l <= 0 || UICMP(32, l, >=, 0xFFFFu)) {
756 n_err(_("URL with invalid port number: \"%s\"\n"), urlp->url_input);
757 goto jleave;
758 }
759 urlp->url_portno = (ui16_t)l;
760 } else {
761 if ((x = strchr(data, '/')) != NULL)
762 data = savestrbuf(data, PTR2SIZE(x - data));
763 cp = UNCONST(data + strlen(data));
764 }
765
766 /* A (non-empty) path may only occur with IMAP */
767 if (x != NULL && x[1] != '\0') {
768 #if 0
769 if (cproto != CPROTO_IMAP) {
770 #endif
771 n_err(_("URL protocol doesn't support paths: \"%s\"\n"),
772 urlp->url_input);
773 goto jleave;
774 #if 0
775 }
776 urlp->url_path.l = strlen(++x);
777 urlp->url_path.s = savestrbuf(x, urlp->url_path.l);
778 #endif
779 }
780
781 urlp->url_host.s = savestrbuf(data, urlp->url_host.l = PTR2SIZE(cp - data));
782 { size_t i;
783 for (cp = urlp->url_host.s, i = urlp->url_host.l; i != 0; ++cp, --i)
784 *cp = lowerconv(*cp);
785 }
786
787 /* .url_h_p: HOST:PORT */
788 { size_t i;
789 struct str *s = &urlp->url_h_p;
790
791 s->s = salloc(urlp->url_host.l + 1 + sizeof("65536")-1 +1);
792 memcpy(s->s, urlp->url_host.s, i = urlp->url_host.l);
793 if (urlp->url_port != NULL) {
794 size_t j = strlen(urlp->url_port);
795 s->s[i++] = ':';
796 memcpy(s->s + i, urlp->url_port, j);
797 i += j;
798 }
799 s->s[i] = '\0';
800 s->l = i;
801 }
802
803 /* User, II
804 * If there was no user in the URL, do we have *user-HOST* or *user*? */
805 if (!urlp->url_had_user) {
806 if ((urlp->url_user.s = xok_vlook(user, urlp, OXM_PLAIN | OXM_H_P))
807 == NULL) {
808 /* No, check wether .netrc lookup is desired */
809 # ifdef HAVE_NETRC
810 if (!ok_blook(v15_compat) ||
811 !xok_blook(netrc_lookup, urlp, OXM_PLAIN | OXM_H_P) ||
812 !_nrc_lookup(urlp, FAL0))
813 # endif
814 urlp->url_user.s = UNCONST(myname);
815 }
816
817 urlp->url_user.l = strlen(urlp->url_user.s);
818 urlp->url_user.s = savestrbuf(urlp->url_user.s, urlp->url_user.l);
819 urlp->url_user_enc.l = strlen(
820 urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0));
821 }
822
823 /* And then there are a lot of prebuild string combinations TODO do lazy */
824
825 /* .url_u_h: .url_user@.url_host
826 * For SMTP we apply ridiculously complicated *v15-compat* plus
827 * *smtp-hostname* / *hostname* dependent rules */
828 { struct str h, *s;
829 size_t i;
830
831 if (cproto == CPROTO_SMTP && ok_blook(v15_compat) &&
832 (cp = ok_vlook(smtp_hostname)) != NULL) {
833 if (*cp == '\0')
834 cp = nodename(1);
835 h.s = savestrbuf(cp, h.l = strlen(cp));
836 } else
837 h = urlp->url_host;
838
839 s = &urlp->url_u_h;
840 i = urlp->url_user.l;
841
842 s->s = salloc(i + 1 + h.l +1);
843 if (i > 0) {
844 memcpy(s->s, urlp->url_user.s, i);
845 s->s[i++] = '@';
846 }
847 memcpy(s->s + i, h.s, h.l +1);
848 i += h.l;
849 s->l = i;
850 }
851
852 /* .url_u_h_p: .url_user@.url_host[:.url_port] */
853 { struct str *s = &urlp->url_u_h_p;
854 size_t i = urlp->url_user.l;
855
856 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
857 if (i > 0) {
858 memcpy(s->s, urlp->url_user.s, i);
859 s->s[i++] = '@';
860 }
861 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
862 i += urlp->url_h_p.l;
863 s->l = i;
864 }
865
866 /* .url_eu_h_p: .url_user_enc@.url_host[:.url_port] */
867 { struct str *s = &urlp->url_eu_h_p;
868 size_t i = urlp->url_user_enc.l;
869
870 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
871 if (i > 0) {
872 memcpy(s->s, urlp->url_user_enc.s, i);
873 s->s[i++] = '@';
874 }
875 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
876 i += urlp->url_h_p.l;
877 s->l = i;
878 }
879
880 /* .url_p_u_h_p: .url_proto://.url_u_h_p */
881 { size_t i;
882 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_u_h_p.l) +1);
883
884 urlp->url_proto[urlp->url_proto_len] = ':';
885 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_u_h_p.s,
886 urlp->url_u_h_p.l +1);
887 urlp->url_proto[urlp->url_proto_len] = '\0';
888
889 urlp->url_p_u_h_p = ud;
890 }
891
892 /* .url_p_eu_h_p, .url_p_eu_h_p_p: .url_proto://.url_eu_h_p[/.url_path] */
893 { size_t i;
894 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_eu_h_p.l) +
895 1 + urlp->url_path.l +1);
896
897 urlp->url_proto[urlp->url_proto_len] = ':';
898 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_eu_h_p.s,
899 urlp->url_eu_h_p.l +1);
900 urlp->url_proto[urlp->url_proto_len] = '\0';
901
902 if (urlp->url_path.l == 0)
903 urlp->url_p_eu_h_p = urlp->url_p_eu_h_p_p = ud;
904 else {
905 urlp->url_p_eu_h_p = savestrbuf(ud, i);
906 urlp->url_p_eu_h_p_p = ud;
907 ud += i;
908 *ud++ = '/';
909 memcpy(ud, urlp->url_path.s, urlp->url_path.l +1);
910 }
911 }
912
913 rv = TRU1;
914 #endif /* __ANYPROTO */
915 jleave:
916 NYD_LEAVE;
917 return rv;
918 #undef __ANYPROTO
919 #undef __ALLPROTO
920 }
921
922 FL bool_t
923 ccred_lookup_old(struct ccred *ccp, enum cproto cproto, char const *addr)
924 {
925 char const *pname, *pxstr, *authdef;
926 size_t pxlen, addrlen, i;
927 char *vbuf, *s;
928 ui8_t authmask;
929 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
930 ware = NONE;
931 bool_t addr_is_nuser = FAL0; /* XXX v15.0 legacy! v15_compat */
932 NYD_ENTER;
933
934 memset(ccp, 0, sizeof *ccp);
935
936 switch (cproto) {
937 default:
938 case CPROTO_SMTP:
939 pname = "SMTP";
940 pxstr = "smtp-auth";
941 pxlen = sizeof("smtp-auth") -1;
942 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
943 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
944 authdef = "none";
945 addr_is_nuser = TRU1;
946 break;
947 case CPROTO_POP3:
948 pname = "POP3";
949 pxstr = "pop3-auth";
950 pxlen = sizeof("pop3-auth") -1;
951 authmask = AUTHTYPE_PLAIN;
952 authdef = "plain";
953 break;
954 }
955
956 ccp->cc_cproto = cproto;
957 addrlen = strlen(addr);
958 vbuf = ac_alloc(pxlen + addrlen + sizeof("-password-")-1 +1);
959 memcpy(vbuf, pxstr, pxlen);
960
961 /* Authentication type */
962 vbuf[pxlen] = '-';
963 memcpy(vbuf + pxlen + 1, addr, addrlen +1);
964 if ((s = vok_vlook(vbuf)) == NULL) {
965 vbuf[pxlen] = '\0';
966 if ((s = vok_vlook(vbuf)) == NULL)
967 s = UNCONST(authdef);
968 }
969
970 if (!asccasecmp(s, "none")) {
971 ccp->cc_auth = "NONE";
972 ccp->cc_authtype = AUTHTYPE_NONE;
973 /*ware = NONE;*/
974 } else if (!asccasecmp(s, "plain")) {
975 ccp->cc_auth = "PLAIN";
976 ccp->cc_authtype = AUTHTYPE_PLAIN;
977 ware = REQ_PASS | REQ_USER;
978 } else if (!asccasecmp(s, "login")) {
979 ccp->cc_auth = "LOGIN";
980 ccp->cc_authtype = AUTHTYPE_LOGIN;
981 ware = REQ_PASS | REQ_USER;
982 } else if (!asccasecmp(s, "cram-md5")) {
983 ccp->cc_auth = "CRAM-MD5";
984 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
985 ware = REQ_PASS | REQ_USER;
986 } else if (!asccasecmp(s, "gssapi")) {
987 ccp->cc_auth = "GSS-API";
988 ccp->cc_authtype = AUTHTYPE_GSSAPI;
989 ware = REQ_USER;
990 } /* no else */
991
992 /* Verify method */
993 if (!(ccp->cc_authtype & authmask)) {
994 n_err(_("Unsupported %s authentication method: %s\n"), pname, s);
995 ccp = NULL;
996 goto jleave;
997 }
998 # ifndef HAVE_MD5
999 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1000 n_err(_("No CRAM-MD5 support compiled in\n"));
1001 ccp = NULL;
1002 goto jleave;
1003 }
1004 # endif
1005 # ifndef HAVE_GSSAPI
1006 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1007 n_err(_("No GSS-API support compiled in\n"));
1008 ccp = NULL;
1009 goto jleave;
1010 }
1011 # endif
1012
1013 /* User name */
1014 if (!(ware & (WANT_USER | REQ_USER)))
1015 goto jpass;
1016
1017 if (!addr_is_nuser) {
1018 if ((s = _url_last_at_before_slash(addr)) != NULL) {
1019 ccp->cc_user.s = urlxdec(savestrbuf(addr, PTR2SIZE(s - addr)));
1020 ccp->cc_user.l = strlen(ccp->cc_user.s);
1021 } else if (ware & REQ_USER)
1022 goto jgetuser;
1023 goto jpass;
1024 }
1025
1026 memcpy(vbuf + pxlen, "-user-", i = sizeof("-user-") -1);
1027 i += pxlen;
1028 memcpy(vbuf + i, addr, addrlen +1);
1029 if ((s = vok_vlook(vbuf)) == NULL) {
1030 vbuf[--i] = '\0';
1031 if ((s = vok_vlook(vbuf)) == NULL && (ware & REQ_USER)) {
1032 if ((s = getuser(NULL)) == NULL) {
1033 jgetuser: /* TODO v15.0: today we simply bail, but we should call getuser().
1034 * TODO even better: introduce "PROTO-user" and "PROTO-pass" and
1035 * TODO check that first, then! change control flow, grow vbuf */
1036 n_err(_("A user is necessary for %s authentication\n"), pname);
1037 ccp = NULL;
1038 goto jleave;
1039 }
1040 }
1041 }
1042 ccp->cc_user.l = strlen(ccp->cc_user.s = savestr(s));
1043
1044 /* Password */
1045 jpass:
1046 if (!(ware & (WANT_PASS | REQ_PASS)))
1047 goto jleave;
1048
1049 if (!addr_is_nuser) {
1050 memcpy(vbuf, "password-", i = sizeof("password-") -1);
1051 } else {
1052 memcpy(vbuf + pxlen, "-password-", i = sizeof("-password-") -1);
1053 i += pxlen;
1054 }
1055 memcpy(vbuf + i, addr, addrlen +1);
1056 if ((s = vok_vlook(vbuf)) == NULL) {
1057 vbuf[--i] = '\0';
1058 if ((!addr_is_nuser || (s = vok_vlook(vbuf)) == NULL) &&
1059 (ware & REQ_PASS)) {
1060 if ((s = getpassword(NULL)) == NULL) {
1061 n_err(_("A password is necessary for %s authentication\n"),
1062 pname);
1063 ccp = NULL;
1064 goto jleave;
1065 }
1066 }
1067 }
1068 if (s != NULL)
1069 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1070
1071 jleave:
1072 ac_free(vbuf);
1073 if (ccp != NULL && (options & OPT_D_VV))
1074 n_err(_("Credentials: host \"%s\", user \"%s\", pass \"%s\"\n"),
1075 addr, (ccp->cc_user.s != NULL ? ccp->cc_user.s : ""),
1076 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : ""));
1077 NYD_LEAVE;
1078 return (ccp != NULL);
1079 }
1080
1081 FL bool_t
1082 ccred_lookup(struct ccred *ccp, struct url *urlp)
1083 {
1084 char const *pstr, *authdef;
1085 char *s;
1086 enum okeys authokey;
1087 ui8_t authmask;
1088 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1089 ware = NONE;
1090 NYD_ENTER;
1091
1092 memset(ccp, 0, sizeof *ccp);
1093 ccp->cc_user = urlp->url_user;
1094
1095 switch ((ccp->cc_cproto = urlp->url_cproto)) {
1096 default:
1097 case CPROTO_SMTP:
1098 pstr = "smtp";
1099 authokey = ok_v_smtp_auth;
1100 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1101 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1102 authdef = "plain";
1103 break;
1104 case CPROTO_POP3:
1105 pstr = "pop3";
1106 authokey = ok_v_pop3_auth;
1107 authmask = AUTHTYPE_PLAIN;
1108 authdef = "plain";
1109 break;
1110 }
1111
1112 /* Authentication type */
1113 if ((s = xok_VLOOK(authokey, urlp, OXM_ALL)) == NULL)
1114 s = UNCONST(authdef);
1115
1116 if (!asccasecmp(s, "none")) {
1117 ccp->cc_auth = "NONE";
1118 ccp->cc_authtype = AUTHTYPE_NONE;
1119 /*ware = NONE;*/
1120 } else if (!asccasecmp(s, "plain")) {
1121 ccp->cc_auth = "PLAIN";
1122 ccp->cc_authtype = AUTHTYPE_PLAIN;
1123 ware = REQ_PASS | REQ_USER;
1124 } else if (!asccasecmp(s, "login")) {
1125 ccp->cc_auth = "LOGIN";
1126 ccp->cc_authtype = AUTHTYPE_LOGIN;
1127 ware = REQ_PASS | REQ_USER;
1128 } else if (!asccasecmp(s, "cram-md5")) {
1129 ccp->cc_auth = "CRAM-MD5";
1130 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1131 ware = REQ_PASS | REQ_USER;
1132 } else if (!asccasecmp(s, "gssapi")) {
1133 ccp->cc_auth = "GSS-API";
1134 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1135 ware = REQ_USER;
1136 } /* no else */
1137
1138 /* Verify method */
1139 if (!(ccp->cc_authtype & authmask)) {
1140 n_err(_("Unsupported %s authentication method: %s\n"), pstr, s);
1141 ccp = NULL;
1142 goto jleave;
1143 }
1144 # ifndef HAVE_MD5
1145 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1146 n_err(_("No CRAM-MD5 support compiled in\n"));
1147 ccp = NULL;
1148 goto jleave;
1149 }
1150 # endif
1151 # ifndef HAVE_GSSAPI
1152 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1153 n_err(_("No GSS-API support compiled in\n"));
1154 ccp = NULL;
1155 goto jleave;
1156 }
1157 # endif
1158
1159 /* Password */
1160 ccp->cc_pass = urlp->url_pass;
1161 if (ccp->cc_pass.s != NULL)
1162 goto jleave;
1163
1164 if ((s = xok_vlook(password, urlp, OXM_ALL)) != NULL)
1165 goto js2pass;
1166 # ifdef HAVE_AGENT
1167 if ((s = xok_vlook(agent_shell_lookup, urlp, OXM_ALL)) != NULL) {
1168 if (!_agent_shell_lookup(urlp, s)) {
1169 ccp = NULL;
1170 goto jleave;
1171 } else if (urlp->url_pass.s != NULL) {
1172 ccp->cc_pass = urlp->url_pass;
1173 goto jleave;
1174 }
1175 }
1176 # endif
1177 # ifdef HAVE_NETRC
1178 if (xok_blook(netrc_lookup, urlp, OXM_ALL) && _nrc_lookup(urlp, TRU1)) {
1179 ccp->cc_pass = urlp->url_pass;
1180 goto jleave;
1181 }
1182 # endif
1183 if (ware & REQ_PASS) {
1184 if ((s = getpassword(NULL)) != NULL)
1185 js2pass:
1186 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1187 else {
1188 n_err(_("A password is necessary for %s authentication\n"), pstr);
1189 ccp = NULL;
1190 }
1191 }
1192
1193 jleave:
1194 if (ccp != NULL && (options & OPT_D_VV))
1195 n_err(_("Credentials: host \"%s\", user \"%s\", pass \"%s\"\n"),
1196 urlp->url_h_p.s, (ccp->cc_user.s != NULL ? ccp->cc_user.s : ""),
1197 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : ""));
1198 NYD_LEAVE;
1199 return (ccp != NULL);
1200 }
1201 #endif /* HAVE_SOCKETS */
1202
1203 #ifdef HAVE_NETRC
1204 FL int
1205 c_netrc(void *v)
1206 {
1207 char **argv = v;
1208 struct nrc_node *nrc;
1209 bool_t load_only;
1210 NYD_ENTER;
1211
1212 load_only = FAL0;
1213 if (*argv == NULL)
1214 goto jlist;
1215 if (argv[1] != NULL)
1216 goto jerr;
1217 if (!asccasecmp(*argv, "show"))
1218 goto jlist;
1219 load_only = TRU1;
1220 if (!asccasecmp(*argv, "load"))
1221 goto jlist;
1222 if (!asccasecmp(*argv, "clear"))
1223 goto jclear;
1224 jerr:
1225 n_err(_("Synopsis: netrc: (<show> or) <clear> the .netrc cache\n"));
1226 v = NULL;
1227 jleave:
1228 NYD_LEAVE;
1229 return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
1230
1231 jlist: {
1232 FILE *fp;
1233 size_t l;
1234
1235 if (_nrc_list == NULL)
1236 _nrc_init();
1237 if (_nrc_list == NRC_NODE_ERR) {
1238 n_err(_("Interpolate what file?\n"));
1239 v = NULL;
1240 goto jleave;
1241 }
1242 if (load_only)
1243 goto jleave;
1244
1245 if ((fp = Ftmp(NULL, "netrc", OF_RDWR | OF_UNLINK | OF_REGISTER)) == NULL) {
1246 n_perr(_("tmpfile"), 0);
1247 v = NULL;
1248 goto jleave;
1249 }
1250
1251 for (l = 0, nrc = _nrc_list; nrc != NULL; ++l, nrc = nrc->nrc_next) {
1252 fprintf(fp, _("machine %s "), nrc->nrc_dat);
1253 if (nrc->nrc_ulen > 0)
1254 fprintf(fp, _("login \"%s\" "),
1255 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1));
1256 if (nrc->nrc_plen > 0)
1257 fprintf(fp, _("password \"%s\"\n"),
1258 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1 + nrc->nrc_ulen +1));
1259 else
1260 putc('\n', fp);
1261 }
1262
1263 page_or_print(fp, l);
1264 Fclose(fp);
1265 }
1266 goto jleave;
1267
1268 jclear:
1269 if (_nrc_list == NRC_NODE_ERR)
1270 _nrc_list = NULL;
1271 while ((nrc = _nrc_list) != NULL) {
1272 _nrc_list = nrc->nrc_next;
1273 free(nrc);
1274 }
1275 goto jleave;
1276 }
1277 #endif /* HAVE_NETRC */
1278
1279 #ifdef HAVE_MD5
1280 FL char *
1281 md5tohex(char hex[MD5TOHEX_SIZE], void const *vp)
1282 {
1283 char const *cp = vp;
1284 size_t i, j;
1285 NYD_ENTER;
1286
1287 for (i = 0; i < MD5TOHEX_SIZE / 2; ++i) {
1288 j = i << 1;
1289 # define __hex(n) ((n) > 9 ? (n) - 10 + 'a' : (n) + '0')
1290 hex[j] = __hex((cp[i] & 0xF0) >> 4);
1291 hex[++j] = __hex(cp[i] & 0x0F);
1292 # undef __hex
1293 }
1294 NYD_LEAVE;
1295 return hex;
1296 }
1297
1298 FL char *
1299 cram_md5_string(struct str const *user, struct str const *pass,
1300 char const *b64)
1301 {
1302 struct str in, out;
1303 char digest[16], *cp;
1304 NYD_ENTER;
1305
1306 out.s = NULL;
1307 in.s = UNCONST(b64);
1308 in.l = strlen(in.s);
1309 b64_decode(&out, &in, NULL);
1310 assert(out.s != NULL);
1311
1312 hmac_md5((uc_i*)out.s, out.l, (uc_i*)pass->s, pass->l, digest);
1313 free(out.s);
1314 cp = md5tohex(salloc(MD5TOHEX_SIZE +1), digest);
1315
1316 in.l = user->l + MD5TOHEX_SIZE +1;
1317 in.s = ac_alloc(user->l + 1 + MD5TOHEX_SIZE +1);
1318 memcpy(in.s, user->s, user->l);
1319 in.s[user->l] = ' ';
1320 memcpy(in.s + user->l + 1, cp, MD5TOHEX_SIZE);
1321 b64_encode(&out, &in, B64_SALLOC | B64_CRLF);
1322 ac_free(in.s);
1323 NYD_LEAVE;
1324 return out.s;
1325 }
1326
1327 FL void
1328 hmac_md5(unsigned char *text, int text_len, unsigned char *key, int key_len,
1329 void *digest)
1330 {
1331 /*
1332 * This code is taken from
1333 *
1334 * Network Working Group H. Krawczyk
1335 * Request for Comments: 2104 IBM
1336 * Category: Informational M. Bellare
1337 * UCSD
1338 * R. Canetti
1339 * IBM
1340 * February 1997
1341 *
1342 *
1343 * HMAC: Keyed-Hashing for Message Authentication
1344 */
1345 md5_ctx context;
1346 unsigned char k_ipad[65]; /* inner padding - key XORd with ipad */
1347 unsigned char k_opad[65]; /* outer padding - key XORd with opad */
1348 unsigned char tk[16];
1349 int i;
1350 NYD_ENTER;
1351
1352 /* if key is longer than 64 bytes reset it to key=MD5(key) */
1353 if (key_len > 64) {
1354 md5_ctx tctx;
1355
1356 md5_init(&tctx);
1357 md5_update(&tctx, key, key_len);
1358 md5_final(tk, &tctx);
1359
1360 key = tk;
1361 key_len = 16;
1362 }
1363
1364 /* the HMAC_MD5 transform looks like:
1365 *
1366 * MD5(K XOR opad, MD5(K XOR ipad, text))
1367 *
1368 * where K is an n byte key
1369 * ipad is the byte 0x36 repeated 64 times
1370 * opad is the byte 0x5c repeated 64 times
1371 * and text is the data being protected */
1372
1373 /* start out by storing key in pads */
1374 memset(k_ipad, 0, sizeof k_ipad);
1375 memset(k_opad, 0, sizeof k_opad);
1376 memcpy(k_ipad, key, key_len);
1377 memcpy(k_opad, key, key_len);
1378
1379 /* XOR key with ipad and opad values */
1380 for (i=0; i<64; i++) {
1381 k_ipad[i] ^= 0x36;
1382 k_opad[i] ^= 0x5c;
1383 }
1384
1385 /* perform inner MD5 */
1386 md5_init(&context); /* init context for 1st pass */
1387 md5_update(&context, k_ipad, 64); /* start with inner pad */
1388 md5_update(&context, text, text_len); /* then text of datagram */
1389 md5_final(digest, &context); /* finish up 1st pass */
1390
1391 /* perform outer MD5 */
1392 md5_init(&context); /* init context for 2nd pass */
1393 md5_update(&context, k_opad, 64); /* start with outer pad */
1394 md5_update(&context, digest, 16); /* then results of 1st hash */
1395 md5_final(digest, &context); /* finish up 2nd pass */
1396 NYD_LEAVE;
1397 }
1398 #endif /* HAVE_MD5 */
1399
1400 /* s-it-mode */
A mail processing system intended to provide the functionality of the POSIX mailx(1) command