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nail.1: more on sortability (Rudolf Sykora)..
[s-mailx.git] / urlcrecry.c
blob1450e1a12122bcf0cc24e9524be32f008369e7cf
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 && defined HAVE_IMAP
626 # define __ALLPROTO
627 #endif
628 #if defined HAVE_SMTP || defined HAVE_POP3 || defined HAVE_IMAP
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 case CPROTO_IMAP:
682 #ifdef HAVE_IMAP
683 _if ("imap", 143)
684 _ifs ("imaps", 993)
685 _protox("imap", 143);
686 break;
687 #else
688 goto jeproto;
689 #endif
690 }
691
692 #undef _ifs
693 #undef _if
694 #undef __if
695 #undef _protox
696
697 if (strstr(data, "://") != NULL) {
698 #if !defined __ALLPROTO || !defined HAVE_SSL
699 jeproto:
700 #endif
701 n_err(_("URL \"proto://\" prefix invalid: \"%s\"\n"), urlp->url_input);
702 goto jleave;
703 }
704 #ifdef __ANYPROTO
705
706 /* User and password, I */
707 juser:
708 if ((cp = _url_last_at_before_slash(data)) != NULL) {
709 size_t l = PTR2SIZE(cp - data);
710 char const *d = data;
711 char *ub = ac_alloc(l +1);
712
713 urlp->url_had_user = TRU1;
714 data = cp + 1;
715
716 /* And also have a password? */
717 if ((cp = memchr(d, ':', l)) != NULL) {
718 size_t i = PTR2SIZE(cp - d);
719
720 l -= i + 1;
721 memcpy(ub, cp + 1, l);
722 ub[l] = '\0';
723 urlp->url_pass.l = strlen(urlp->url_pass.s = urlxdec(ub));
724
725 if (strcmp(ub, urlxenc(urlp->url_pass.s, FAL0))) {
726 n_err(_("String is not properly URL percent encoded: \"%s\"\n"),
727 ub);
728 goto jleave;
729 }
730 l = i;
731 }
732
733 memcpy(ub, d, l);
734 ub[l] = '\0';
735 urlp->url_user.l = strlen(urlp->url_user.s = urlxdec(ub));
736 urlp->url_user_enc.l = strlen(
737 urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0));
738
739 if (urlp->url_user_enc.l != l || memcmp(urlp->url_user_enc.s, ub, l)) {
740 n_err(_("String is not properly URL percent encoded: \"%s\"\n"), ub);
741 goto jleave;
742 }
743
744 ac_free(ub);
745 }
746
747 /* Servername and port -- and possible path suffix */
748 if ((cp = strchr(data, ':')) != NULL) { /* TODO URL parse, IPv6 support */
749 char *eptr;
750 long l;
751
752 urlp->url_port = x = savestr(x = cp + 1);
753 if ((x = strchr(x, '/')) != NULL)
754 *x = '\0';
755 l = strtol(urlp->url_port, &eptr, 10);
756 if (*eptr != '\0' || l <= 0 || UICMP(32, l, >=, 0xFFFFu)) {
757 n_err(_("URL with invalid port number: \"%s\"\n"), urlp->url_input);
758 goto jleave;
759 }
760 urlp->url_portno = (ui16_t)l;
761 } else {
762 if ((x = strchr(data, '/')) != NULL)
763 data = savestrbuf(data, PTR2SIZE(x - data));
764 cp = UNCONST(data + strlen(data));
765 }
766
767 /* A (non-empty) path may only occur with IMAP */
768 if (x != NULL && x[1] != '\0') {
769 if (cproto != CPROTO_IMAP) {
770 n_err(_("URL protocol doesn't support paths: \"%s\"\n"),
771 urlp->url_input);
772 goto jleave;
773 }
774 urlp->url_path.l = strlen(++x);
775 urlp->url_path.s = savestrbuf(x, urlp->url_path.l);
776 }
777
778 urlp->url_host.s = savestrbuf(data, urlp->url_host.l = PTR2SIZE(cp - data));
779 { size_t i;
780 for (cp = urlp->url_host.s, i = urlp->url_host.l; i != 0; ++cp, --i)
781 *cp = lowerconv(*cp);
782 }
783
784 /* .url_h_p: HOST:PORT */
785 { size_t i;
786 struct str *s = &urlp->url_h_p;
787
788 s->s = salloc(urlp->url_host.l + 1 + sizeof("65536")-1 +1);
789 memcpy(s->s, urlp->url_host.s, i = urlp->url_host.l);
790 if (urlp->url_port != NULL) {
791 size_t j = strlen(urlp->url_port);
792 s->s[i++] = ':';
793 memcpy(s->s + i, urlp->url_port, j);
794 i += j;
795 }
796 s->s[i] = '\0';
797 s->l = i;
798 }
799
800 /* User, II
801 * If there was no user in the URL, do we have *user-HOST* or *user*? */
802 if (!urlp->url_had_user) {
803 if ((urlp->url_user.s = xok_vlook(user, urlp, OXM_PLAIN | OXM_H_P))
804 == NULL) {
805 /* No, check wether .netrc lookup is desired */
806 # ifdef HAVE_NETRC
807 if (!ok_blook(v15_compat) ||
808 !xok_blook(netrc_lookup, urlp, OXM_PLAIN | OXM_H_P) ||
809 !_nrc_lookup(urlp, FAL0))
810 # endif
811 urlp->url_user.s = UNCONST(myname);
812 }
813
814 urlp->url_user.l = strlen(urlp->url_user.s);
815 urlp->url_user.s = savestrbuf(urlp->url_user.s, urlp->url_user.l);
816 urlp->url_user_enc.l = strlen(
817 urlp->url_user_enc.s = urlxenc(urlp->url_user.s, FAL0));
818 }
819
820 /* And then there are a lot of prebuild string combinations TODO do lazy */
821
822 /* .url_u_h: .url_user@.url_host
823 * For SMTP we apply ridiculously complicated *v15-compat* plus
824 * *smtp-hostname* / *hostname* dependent rules */
825 { struct str h, *s;
826 size_t i;
827
828 if (cproto == CPROTO_SMTP && ok_blook(v15_compat) &&
829 (cp = ok_vlook(smtp_hostname)) != NULL) {
830 if (*cp == '\0')
831 cp = nodename(1);
832 h.s = savestrbuf(cp, h.l = strlen(cp));
833 } else
834 h = urlp->url_host;
835
836 s = &urlp->url_u_h;
837 i = urlp->url_user.l;
838
839 s->s = salloc(i + 1 + h.l +1);
840 if (i > 0) {
841 memcpy(s->s, urlp->url_user.s, i);
842 s->s[i++] = '@';
843 }
844 memcpy(s->s + i, h.s, h.l +1);
845 i += h.l;
846 s->l = i;
847 }
848
849 /* .url_u_h_p: .url_user@.url_host[:.url_port] */
850 { struct str *s = &urlp->url_u_h_p;
851 size_t i = urlp->url_user.l;
852
853 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
854 if (i > 0) {
855 memcpy(s->s, urlp->url_user.s, i);
856 s->s[i++] = '@';
857 }
858 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
859 i += urlp->url_h_p.l;
860 s->l = i;
861 }
862
863 /* .url_eu_h_p: .url_user_enc@.url_host[:.url_port] */
864 { struct str *s = &urlp->url_eu_h_p;
865 size_t i = urlp->url_user_enc.l;
866
867 s->s = salloc(i + 1 + urlp->url_h_p.l +1);
868 if (i > 0) {
869 memcpy(s->s, urlp->url_user_enc.s, i);
870 s->s[i++] = '@';
871 }
872 memcpy(s->s + i, urlp->url_h_p.s, urlp->url_h_p.l +1);
873 i += urlp->url_h_p.l;
874 s->l = i;
875 }
876
877 /* .url_p_u_h_p: .url_proto://.url_u_h_p */
878 { size_t i;
879 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_u_h_p.l) +1);
880
881 urlp->url_proto[urlp->url_proto_len] = ':';
882 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_u_h_p.s,
883 urlp->url_u_h_p.l +1);
884 urlp->url_proto[urlp->url_proto_len] = '\0';
885
886 urlp->url_p_u_h_p = ud;
887 }
888
889 /* .url_p_eu_h_p, .url_p_eu_h_p_p: .url_proto://.url_eu_h_p[/.url_path] */
890 { size_t i;
891 char *ud = salloc((i = urlp->url_proto_xlen + urlp->url_eu_h_p.l) +
892 1 + urlp->url_path.l +1);
893
894 urlp->url_proto[urlp->url_proto_len] = ':';
895 memcpy(sstpcpy(ud, urlp->url_proto), urlp->url_eu_h_p.s,
896 urlp->url_eu_h_p.l +1);
897 urlp->url_proto[urlp->url_proto_len] = '\0';
898
899 if (urlp->url_path.l == 0)
900 urlp->url_p_eu_h_p = urlp->url_p_eu_h_p_p = ud;
901 else {
902 urlp->url_p_eu_h_p = savestrbuf(ud, i);
903 urlp->url_p_eu_h_p_p = ud;
904 ud += i;
905 *ud++ = '/';
906 memcpy(ud, urlp->url_path.s, urlp->url_path.l +1);
907 }
908 }
909
910 rv = TRU1;
911 #endif /* __ANYPROTO */
912 jleave:
913 NYD_LEAVE;
914 return rv;
915 #undef __ANYPROTO
916 #undef __ALLPROTO
917 }
918
919 FL bool_t
920 ccred_lookup_old(struct ccred *ccp, enum cproto cproto, char const *addr)
921 {
922 char const *pname, *pxstr, *authdef;
923 size_t pxlen, addrlen, i;
924 char *vbuf, *s;
925 ui8_t authmask;
926 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
927 ware = NONE;
928 bool_t addr_is_nuser = FAL0; /* XXX v15.0 legacy! v15_compat */
929 NYD_ENTER;
930
931 memset(ccp, 0, sizeof *ccp);
932
933 switch (cproto) {
934 default:
935 case CPROTO_SMTP:
936 pname = "SMTP";
937 pxstr = "smtp-auth";
938 pxlen = sizeof("smtp-auth") -1;
939 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
940 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
941 authdef = "none";
942 addr_is_nuser = TRU1;
943 break;
944 case CPROTO_POP3:
945 pname = "POP3";
946 pxstr = "pop3-auth";
947 pxlen = sizeof("pop3-auth") -1;
948 authmask = AUTHTYPE_PLAIN;
949 authdef = "plain";
950 break;
951 case CPROTO_IMAP:
952 pname = "IMAP";
953 pxstr = "imap-auth";
954 pxlen = sizeof("imap-auth") -1;
955 authmask = AUTHTYPE_LOGIN | AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
956 authdef = "login";
957 break;
958 }
959
960 ccp->cc_cproto = cproto;
961 addrlen = strlen(addr);
962 vbuf = ac_alloc(pxlen + addrlen + sizeof("-password-")-1 +1);
963 memcpy(vbuf, pxstr, pxlen);
964
965 /* Authentication type */
966 vbuf[pxlen] = '-';
967 memcpy(vbuf + pxlen + 1, addr, addrlen +1);
968 if ((s = vok_vlook(vbuf)) == NULL) {
969 vbuf[pxlen] = '\0';
970 if ((s = vok_vlook(vbuf)) == NULL)
971 s = UNCONST(authdef);
972 }
973
974 if (!asccasecmp(s, "none")) {
975 ccp->cc_auth = "NONE";
976 ccp->cc_authtype = AUTHTYPE_NONE;
977 /*ware = NONE;*/
978 } else if (!asccasecmp(s, "plain")) {
979 ccp->cc_auth = "PLAIN";
980 ccp->cc_authtype = AUTHTYPE_PLAIN;
981 ware = REQ_PASS | REQ_USER;
982 } else if (!asccasecmp(s, "login")) {
983 ccp->cc_auth = "LOGIN";
984 ccp->cc_authtype = AUTHTYPE_LOGIN;
985 ware = REQ_PASS | REQ_USER;
986 } else if (!asccasecmp(s, "cram-md5")) {
987 ccp->cc_auth = "CRAM-MD5";
988 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
989 ware = REQ_PASS | REQ_USER;
990 } else if (!asccasecmp(s, "gssapi")) {
991 ccp->cc_auth = "GSS-API";
992 ccp->cc_authtype = AUTHTYPE_GSSAPI;
993 ware = REQ_USER;
994 } /* no else */
995
996 /* Verify method */
997 if (!(ccp->cc_authtype & authmask)) {
998 n_err(_("Unsupported %s authentication method: %s\n"), pname, s);
999 ccp = NULL;
1000 goto jleave;
1001 }
1002 # ifndef HAVE_MD5
1003 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1004 n_err(_("No CRAM-MD5 support compiled in\n"));
1005 ccp = NULL;
1006 goto jleave;
1007 }
1008 # endif
1009 # ifndef HAVE_GSSAPI
1010 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1011 n_err(_("No GSS-API support compiled in\n"));
1012 ccp = NULL;
1013 goto jleave;
1014 }
1015 # endif
1016
1017 /* User name */
1018 if (!(ware & (WANT_USER | REQ_USER)))
1019 goto jpass;
1020
1021 if (!addr_is_nuser) {
1022 if ((s = _url_last_at_before_slash(addr)) != NULL) {
1023 ccp->cc_user.s = urlxdec(savestrbuf(addr, PTR2SIZE(s - addr)));
1024 ccp->cc_user.l = strlen(ccp->cc_user.s);
1025 } else if (ware & REQ_USER)
1026 goto jgetuser;
1027 goto jpass;
1028 }
1029
1030 memcpy(vbuf + pxlen, "-user-", i = sizeof("-user-") -1);
1031 i += pxlen;
1032 memcpy(vbuf + i, addr, addrlen +1);
1033 if ((s = vok_vlook(vbuf)) == NULL) {
1034 vbuf[--i] = '\0';
1035 if ((s = vok_vlook(vbuf)) == NULL && (ware & REQ_USER)) {
1036 if ((s = getuser(NULL)) == NULL) {
1037 jgetuser: /* TODO v15.0: today we simply bail, but we should call getuser().
1038 * TODO even better: introduce "PROTO-user" and "PROTO-pass" and
1039 * TODO check that first, then! change control flow, grow vbuf */
1040 n_err(_("A user is necessary for %s authentication\n"), pname);
1041 ccp = NULL;
1042 goto jleave;
1043 }
1044 }
1045 }
1046 ccp->cc_user.l = strlen(ccp->cc_user.s = savestr(s));
1047
1048 /* Password */
1049 jpass:
1050 if (!(ware & (WANT_PASS | REQ_PASS)))
1051 goto jleave;
1052
1053 if (!addr_is_nuser) {
1054 memcpy(vbuf, "password-", i = sizeof("password-") -1);
1055 } else {
1056 memcpy(vbuf + pxlen, "-password-", i = sizeof("-password-") -1);
1057 i += pxlen;
1058 }
1059 memcpy(vbuf + i, addr, addrlen +1);
1060 if ((s = vok_vlook(vbuf)) == NULL) {
1061 vbuf[--i] = '\0';
1062 if ((!addr_is_nuser || (s = vok_vlook(vbuf)) == NULL) &&
1063 (ware & REQ_PASS)) {
1064 if ((s = getpassword(NULL)) == NULL) {
1065 n_err(_("A password is necessary for %s authentication\n"),
1066 pname);
1067 ccp = NULL;
1068 goto jleave;
1069 }
1070 }
1071 }
1072 if (s != NULL)
1073 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1074
1075 jleave:
1076 ac_free(vbuf);
1077 if (ccp != NULL && (options & OPT_D_VV))
1078 n_err(_("Credentials: host \"%s\", user \"%s\", pass \"%s\"\n"),
1079 addr, (ccp->cc_user.s != NULL ? ccp->cc_user.s : ""),
1080 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : ""));
1081 NYD_LEAVE;
1082 return (ccp != NULL);
1083 }
1084
1085 FL bool_t
1086 ccred_lookup(struct ccred *ccp, struct url *urlp)
1087 {
1088 char const *pstr, *authdef;
1089 char *s;
1090 enum okeys authokey;
1091 ui8_t authmask;
1092 enum {NONE=0, WANT_PASS=1<<0, REQ_PASS=1<<1, WANT_USER=1<<2, REQ_USER=1<<3}
1093 ware = NONE;
1094 NYD_ENTER;
1095
1096 memset(ccp, 0, sizeof *ccp);
1097 ccp->cc_user = urlp->url_user;
1098
1099 switch ((ccp->cc_cproto = urlp->url_cproto)) {
1100 default:
1101 case CPROTO_SMTP:
1102 pstr = "smtp";
1103 authokey = ok_v_smtp_auth;
1104 authmask = AUTHTYPE_NONE | AUTHTYPE_PLAIN | AUTHTYPE_LOGIN |
1105 AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1106 authdef = "plain";
1107 break;
1108 case CPROTO_POP3:
1109 pstr = "pop3";
1110 authokey = ok_v_pop3_auth;
1111 authmask = AUTHTYPE_PLAIN;
1112 authdef = "plain";
1113 break;
1114 case CPROTO_IMAP:
1115 pstr = "imap";
1116 authokey = ok_v_imap_auth;
1117 authmask = AUTHTYPE_LOGIN | AUTHTYPE_CRAM_MD5 | AUTHTYPE_GSSAPI;
1118 authdef = "login";
1119 break;
1120 }
1121
1122 /* Authentication type */
1123 if ((s = xok_VLOOK(authokey, urlp, OXM_ALL)) == NULL)
1124 s = UNCONST(authdef);
1125
1126 if (!asccasecmp(s, "none")) {
1127 ccp->cc_auth = "NONE";
1128 ccp->cc_authtype = AUTHTYPE_NONE;
1129 /*ware = NONE;*/
1130 } else if (!asccasecmp(s, "plain")) {
1131 ccp->cc_auth = "PLAIN";
1132 ccp->cc_authtype = AUTHTYPE_PLAIN;
1133 ware = REQ_PASS | REQ_USER;
1134 } else if (!asccasecmp(s, "login")) {
1135 ccp->cc_auth = "LOGIN";
1136 ccp->cc_authtype = AUTHTYPE_LOGIN;
1137 ware = REQ_PASS | REQ_USER;
1138 } else if (!asccasecmp(s, "cram-md5")) {
1139 ccp->cc_auth = "CRAM-MD5";
1140 ccp->cc_authtype = AUTHTYPE_CRAM_MD5;
1141 ware = REQ_PASS | REQ_USER;
1142 } else if (!asccasecmp(s, "gssapi")) {
1143 ccp->cc_auth = "GSS-API";
1144 ccp->cc_authtype = AUTHTYPE_GSSAPI;
1145 ware = REQ_USER;
1146 } /* no else */
1147
1148 /* Verify method */
1149 if (!(ccp->cc_authtype & authmask)) {
1150 n_err(_("Unsupported %s authentication method: %s\n"), pstr, s);
1151 ccp = NULL;
1152 goto jleave;
1153 }
1154 # ifndef HAVE_MD5
1155 if (ccp->cc_authtype == AUTHTYPE_CRAM_MD5) {
1156 n_err(_("No CRAM-MD5 support compiled in\n"));
1157 ccp = NULL;
1158 goto jleave;
1159 }
1160 # endif
1161 # ifndef HAVE_GSSAPI
1162 if (ccp->cc_authtype == AUTHTYPE_GSSAPI) {
1163 n_err(_("No GSS-API support compiled in\n"));
1164 ccp = NULL;
1165 goto jleave;
1166 }
1167 # endif
1168
1169 /* Password */
1170 ccp->cc_pass = urlp->url_pass;
1171 if (ccp->cc_pass.s != NULL)
1172 goto jleave;
1173
1174 if ((s = xok_vlook(password, urlp, OXM_ALL)) != NULL)
1175 goto js2pass;
1176 # ifdef HAVE_AGENT
1177 if ((s = xok_vlook(agent_shell_lookup, urlp, OXM_ALL)) != NULL) {
1178 if (!_agent_shell_lookup(urlp, s)) {
1179 ccp = NULL;
1180 goto jleave;
1181 } else if (urlp->url_pass.s != NULL) {
1182 ccp->cc_pass = urlp->url_pass;
1183 goto jleave;
1184 }
1185 }
1186 # endif
1187 # ifdef HAVE_NETRC
1188 if (xok_blook(netrc_lookup, urlp, OXM_ALL) && _nrc_lookup(urlp, TRU1)) {
1189 ccp->cc_pass = urlp->url_pass;
1190 goto jleave;
1191 }
1192 # endif
1193 if (ware & REQ_PASS) {
1194 if ((s = getpassword(NULL)) != NULL)
1195 js2pass:
1196 ccp->cc_pass.l = strlen(ccp->cc_pass.s = savestr(s));
1197 else {
1198 n_err(_("A password is necessary for %s authentication\n"), pstr);
1199 ccp = NULL;
1200 }
1201 }
1202
1203 jleave:
1204 if (ccp != NULL && (options & OPT_D_VV))
1205 n_err(_("Credentials: host \"%s\", user \"%s\", pass \"%s\"\n"),
1206 urlp->url_h_p.s, (ccp->cc_user.s != NULL ? ccp->cc_user.s : ""),
1207 (ccp->cc_pass.s != NULL ? ccp->cc_pass.s : ""));
1208 NYD_LEAVE;
1209 return (ccp != NULL);
1210 }
1211 #endif /* HAVE_SOCKETS */
1212
1213 #ifdef HAVE_NETRC
1214 FL int
1215 c_netrc(void *v)
1216 {
1217 char **argv = v;
1218 struct nrc_node *nrc;
1219 NYD_ENTER;
1220
1221 if (*argv == NULL)
1222 goto jlist;
1223 if (argv[1] != NULL)
1224 goto jerr;
1225 if (!asccasecmp(*argv, "show"))
1226 goto jlist;
1227 if (!asccasecmp(*argv, "clear"))
1228 goto jclear;
1229 jerr:
1230 n_err(_("Synopsis: netrc: (<show> or) <clear> the .netrc cache\n"));
1231 v = NULL;
1232 jleave:
1233 NYD_LEAVE;
1234 return (v == NULL ? !STOP : !OKAY); /* xxx 1:bad 0:good -- do some */
1235
1236 jlist: {
1237 FILE *fp;
1238 size_t l;
1239
1240 if (_nrc_list == NULL)
1241 _nrc_init();
1242 if (_nrc_list == NRC_NODE_ERR) {
1243 n_err(_("Interpolate what file?\n"));
1244 v = NULL;
1245 goto jleave;
1246 }
1247
1248 if ((fp = Ftmp(NULL, "netrc", OF_RDWR | OF_UNLINK | OF_REGISTER)) == NULL) {
1249 n_perr(_("tmpfile"), 0);
1250 v = NULL;
1251 goto jleave;
1252 }
1253
1254 for (l = 0, nrc = _nrc_list; nrc != NULL; ++l, nrc = nrc->nrc_next) {
1255 fprintf(fp, _("machine %s "), nrc->nrc_dat);
1256 if (nrc->nrc_ulen > 0)
1257 fprintf(fp, _("login \"%s\" "),
1258 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1));
1259 if (nrc->nrc_plen > 0)
1260 fprintf(fp, _("password \"%s\"\n"),
1261 string_quote(nrc->nrc_dat + nrc->nrc_mlen +1 + nrc->nrc_ulen +1));
1262 else
1263 putc('\n', fp);
1264 }
1265
1266 page_or_print(fp, l);
1267 Fclose(fp);
1268 }
1269 goto jleave;
1270
1271 jclear:
1272 if (_nrc_list == NRC_NODE_ERR)
1273 _nrc_list = NULL;
1274 while ((nrc = _nrc_list) != NULL) {
1275 _nrc_list = nrc->nrc_next;
1276 free(nrc);
1277 }
1278 goto jleave;
1279 }
1280 #endif /* HAVE_NETRC */
1281
1282 #ifdef HAVE_MD5
1283 FL char *
1284 md5tohex(char hex[MD5TOHEX_SIZE], void const *vp)
1285 {
1286 char const *cp = vp;
1287 size_t i, j;
1288 NYD_ENTER;
1289
1290 for (i = 0; i < MD5TOHEX_SIZE / 2; ++i) {
1291 j = i << 1;
1292 # define __hex(n) ((n) > 9 ? (n) - 10 + 'a' : (n) + '0')
1293 hex[j] = __hex((cp[i] & 0xF0) >> 4);
1294 hex[++j] = __hex(cp[i] & 0x0F);
1295 # undef __hex
1296 }
1297 NYD_LEAVE;
1298 return hex;
1299 }
1300
1301 FL char *
1302 cram_md5_string(struct str const *user, struct str const *pass,
1303 char const *b64)
1304 {
1305 struct str in, out;
1306 char digest[16], *cp;
1307 NYD_ENTER;
1308
1309 out.s = NULL;
1310 in.s = UNCONST(b64);
1311 in.l = strlen(in.s);
1312 b64_decode(&out, &in, NULL);
1313 assert(out.s != NULL);
1314
1315 hmac_md5((uc_i*)out.s, out.l, (uc_i*)pass->s, pass->l, digest);
1316 free(out.s);
1317 cp = md5tohex(salloc(MD5TOHEX_SIZE +1), digest);
1318
1319 in.l = user->l + MD5TOHEX_SIZE +1;
1320 in.s = ac_alloc(user->l + 1 + MD5TOHEX_SIZE +1);
1321 memcpy(in.s, user->s, user->l);
1322 in.s[user->l] = ' ';
1323 memcpy(in.s + user->l + 1, cp, MD5TOHEX_SIZE);
1324 b64_encode(&out, &in, B64_SALLOC | B64_CRLF);
1325 ac_free(in.s);
1326 NYD_LEAVE;
1327 return out.s;
1328 }
1329
1330 FL void
1331 hmac_md5(unsigned char *text, int text_len, unsigned char *key, int key_len,
1332 void *digest)
1333 {
1334 /*
1335 * This code is taken from
1336 *
1337 * Network Working Group H. Krawczyk
1338 * Request for Comments: 2104 IBM
1339 * Category: Informational M. Bellare
1340 * UCSD
1341 * R. Canetti
1342 * IBM
1343 * February 1997
1344 *
1345 *
1346 * HMAC: Keyed-Hashing for Message Authentication
1347 */
1348 md5_ctx context;
1349 unsigned char k_ipad[65]; /* inner padding - key XORd with ipad */
1350 unsigned char k_opad[65]; /* outer padding - key XORd with opad */
1351 unsigned char tk[16];
1352 int i;
1353 NYD_ENTER;
1354
1355 /* if key is longer than 64 bytes reset it to key=MD5(key) */
1356 if (key_len > 64) {
1357 md5_ctx tctx;
1358
1359 md5_init(&tctx);
1360 md5_update(&tctx, key, key_len);
1361 md5_final(tk, &tctx);
1362
1363 key = tk;
1364 key_len = 16;
1365 }
1366
1367 /* the HMAC_MD5 transform looks like:
1368 *
1369 * MD5(K XOR opad, MD5(K XOR ipad, text))
1370 *
1371 * where K is an n byte key
1372 * ipad is the byte 0x36 repeated 64 times
1373 * opad is the byte 0x5c repeated 64 times
1374 * and text is the data being protected */
1375
1376 /* start out by storing key in pads */
1377 memset(k_ipad, 0, sizeof k_ipad);
1378 memset(k_opad, 0, sizeof k_opad);
1379 memcpy(k_ipad, key, key_len);
1380 memcpy(k_opad, key, key_len);
1381
1382 /* XOR key with ipad and opad values */
1383 for (i=0; i<64; i++) {
1384 k_ipad[i] ^= 0x36;
1385 k_opad[i] ^= 0x5c;
1386 }
1387
1388 /* perform inner MD5 */
1389 md5_init(&context); /* init context for 1st pass */
1390 md5_update(&context, k_ipad, 64); /* start with inner pad */
1391 md5_update(&context, text, text_len); /* then text of datagram */
1392 md5_final(digest, &context); /* finish up 1st pass */
1393
1394 /* perform outer MD5 */
1395 md5_init(&context); /* init context for 2nd pass */
1396 md5_update(&context, k_opad, 64); /* start with outer pad */
1397 md5_update(&context, digest, 16); /* then results of 1st hash */
1398 md5_final(digest, &context); /* finish up 2nd pass */
1399 NYD_LEAVE;
1400 }
1401 #endif /* HAVE_MD5 */
1402
1403 /* s-it-mode */
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