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0756eb3c PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
f9ba5e22 | 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
1e1ddfac | 6 | /* Copyright (c) The Exim Maintainers 2020 */ |
0756eb3c PH |
7 | /* See the file NOTICE for conditions of use and distribution. */ |
8 | ||
c5ddb310 | 9 | /* This code was originally contributed by Matthew Byng-Maddick */ |
0756eb3c PH |
10 | |
11 | /* Copyright (c) A L Digital 2004 */ | |
12 | ||
13 | /* A generic (mechanism independent) Cyrus SASL authenticator. */ | |
14 | ||
15 | ||
16 | #include "../exim.h" | |
17 | ||
18 | ||
19 | /* We can't just compile this code and allow the library mechanism to omit the | |
20 | functions if they are not wanted, because we need to have the Cyrus SASL header | |
21 | available for compiling. Therefore, compile these functions only if | |
22 | AUTH_CYRUS_SASL is defined. However, some compilers don't like compiling empty | |
23 | modules, so keep them happy with a dummy when skipping the rest. Make it | |
24 | reference itself to stop picky compilers complaining that it is unused, and put | |
25 | in a dummy argument to stop even pickier compilers complaining about infinite | |
26 | loops. */ | |
27 | ||
28 | #ifndef AUTH_CYRUS_SASL | |
e1d15f5e JH |
29 | static void dummy(int x); |
30 | static void dummy2(int x) { dummy(x-1); } | |
31 | static void dummy(int x) { dummy2(x-1); } | |
0756eb3c PH |
32 | #else |
33 | ||
34 | ||
35 | #include <sasl/sasl.h> | |
36 | #include "cyrus_sasl.h" | |
37 | ||
38 | /* Options specific to the cyrus_sasl authentication mechanism. */ | |
39 | ||
40 | optionlist auth_cyrus_sasl_options[] = { | |
41 | { "server_hostname", opt_stringptr, | |
13a4b4c1 | 42 | OPT_OFF(auth_cyrus_sasl_options_block, server_hostname) }, |
0756eb3c | 43 | { "server_mech", opt_stringptr, |
13a4b4c1 | 44 | OPT_OFF(auth_cyrus_sasl_options_block, server_mech) }, |
0756eb3c | 45 | { "server_realm", opt_stringptr, |
13a4b4c1 | 46 | OPT_OFF(auth_cyrus_sasl_options_block, server_realm) }, |
0756eb3c | 47 | { "server_service", opt_stringptr, |
13a4b4c1 | 48 | OPT_OFF(auth_cyrus_sasl_options_block, server_service) } |
0756eb3c PH |
49 | }; |
50 | ||
51 | /* Size of the options list. An extern variable has to be used so that its | |
52 | address can appear in the tables drtables.c. */ | |
53 | ||
54 | int auth_cyrus_sasl_options_count = | |
55 | sizeof(auth_cyrus_sasl_options)/sizeof(optionlist); | |
56 | ||
16ff981e | 57 | /* Default private options block for the cyrus_sasl authentication method. */ |
0756eb3c PH |
58 | |
59 | auth_cyrus_sasl_options_block auth_cyrus_sasl_option_defaults = { | |
60 | US"smtp", /* server_service */ | |
61 | US"$primary_hostname", /* server_hostname */ | |
62 | NULL, /* server_realm */ | |
63 | NULL /* server_mech */ | |
64 | }; | |
65 | ||
66 | ||
d185889f JH |
67 | #ifdef MACRO_PREDEF |
68 | ||
69 | /* Dummy values */ | |
70 | void auth_cyrus_sasl_init(auth_instance *ablock) {} | |
71 | int auth_cyrus_sasl_server(auth_instance *ablock, uschar *data) {return 0;} | |
251b9eb4 JH |
72 | int auth_cyrus_sasl_client(auth_instance *ablock, void * sx, |
73 | int timeout, uschar *buffer, int buffsize) {return 0;} | |
f9df71c0 | 74 | void auth_cyrus_sasl_version_report(FILE *f) {} |
d185889f JH |
75 | |
76 | #else /*!MACRO_PREDEF*/ | |
77 | ||
78 | ||
79 | ||
80 | ||
0756eb3c PH |
81 | /************************************************* |
82 | * Initialization entry point * | |
83 | *************************************************/ | |
84 | ||
85 | /* Called for each instance, after its options have been read, to | |
86 | enable consistency checks to be done, or anything else that needs | |
87 | to be set up. */ | |
88 | ||
c5ddb310 PH |
89 | |
90 | /* Auxiliary function, passed in data to sasl_server_init(). */ | |
91 | ||
92 | static int | |
6a2c32cb JH |
93 | mysasl_config(void *context, const char *plugin_name, const char *option, |
94 | const char **result, unsigned int *len) | |
c5ddb310 PH |
95 | { |
96 | if (context && !strcmp(option, "mech_list")) | |
97 | { | |
98 | *result = context; | |
6a2c32cb | 99 | if (len) *len = strlen(*result); |
c5ddb310 PH |
100 | return SASL_OK; |
101 | } | |
102 | return SASL_FAIL; | |
103 | } | |
104 | ||
105 | /* Here's the real function */ | |
106 | ||
0756eb3c PH |
107 | void |
108 | auth_cyrus_sasl_init(auth_instance *ablock) | |
109 | { | |
110 | auth_cyrus_sasl_options_block *ob = | |
111 | (auth_cyrus_sasl_options_block *)(ablock->options_block); | |
93a6fce2 | 112 | const uschar *list, *listptr, *buffer; |
0756eb3c PH |
113 | int rc, i; |
114 | unsigned int len; | |
f3ebb786 JH |
115 | rmark rs_point; |
116 | uschar *expanded_hostname; | |
4c287009 | 117 | char *realm_expanded; |
0756eb3c | 118 | |
c5ddb310 | 119 | sasl_conn_t *conn; |
c0fb53b7 | 120 | sasl_callback_t cbs[] = { |
c5ddb310 PH |
121 | {SASL_CB_GETOPT, NULL, NULL }, |
122 | {SASL_CB_LIST_END, NULL, NULL}}; | |
123 | ||
0756eb3c | 124 | /* default the mechanism to our "public name" */ |
0756eb3c | 125 | |
6a2c32cb JH |
126 | if (!ob->server_mech) ob->server_mech = string_copy(ablock->public_name); |
127 | ||
128 | if (!(expanded_hostname = expand_string(ob->server_hostname))) | |
edc33b5f PP |
129 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: " |
130 | "couldn't expand server_hostname [%s]: %s", | |
131 | ablock->name, ob->server_hostname, expand_string_message); | |
132 | ||
c0fb53b7 | 133 | realm_expanded = NULL; |
6a2c32cb JH |
134 | if ( ob->server_realm |
135 | && !(realm_expanded = CS expand_string(ob->server_realm))) | |
136 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: " | |
137 | "couldn't expand server_realm [%s]: %s", | |
138 | ablock->name, ob->server_realm, expand_string_message); | |
4c287009 | 139 | |
0756eb3c | 140 | /* we're going to initialise the library to check that there is an |
6a2c32cb | 141 | authenticator of type whatever mechanism we're using */ |
c5ddb310 | 142 | |
edc33b5f | 143 | cbs[0].proc = (int(*)(void)) &mysasl_config; |
c5ddb310 PH |
144 | cbs[0].context = ob->server_mech; |
145 | ||
6a2c32cb | 146 | if ((rc = sasl_server_init(cbs, "exim")) != SASL_OK) |
0756eb3c PH |
147 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: " |
148 | "couldn't initialise Cyrus SASL library.", ablock->name); | |
149 | ||
c0fb53b7 | 150 | if ((rc = sasl_server_new(CS ob->server_service, CS expanded_hostname, |
6a2c32cb | 151 | realm_expanded, NULL, NULL, NULL, 0, &conn)) != SASL_OK) |
0756eb3c PH |
152 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: " |
153 | "couldn't initialise Cyrus SASL server connection.", ablock->name); | |
154 | ||
3d2e82c5 | 155 | if ((rc = sasl_listmech(conn, NULL, "", ":", "", CCSS &list, &len, &i)) != SASL_OK) |
0756eb3c PH |
156 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: " |
157 | "couldn't get Cyrus SASL mechanism list.", ablock->name); | |
158 | ||
c0fb53b7 JH |
159 | i = ':'; |
160 | listptr = list; | |
0756eb3c | 161 | |
c0fb53b7 JH |
162 | HDEBUG(D_auth) |
163 | { | |
edc33b5f | 164 | debug_printf("Initialised Cyrus SASL service=\"%s\" fqdn=\"%s\" realm=\"%s\"\n", |
4c287009 | 165 | ob->server_service, expanded_hostname, realm_expanded); |
edc33b5f | 166 | debug_printf("Cyrus SASL knows mechanisms: %s\n", list); |
c0fb53b7 | 167 | } |
0756eb3c PH |
168 | |
169 | /* the store_get / store_reset mechanism is hierarchical | |
6a2c32cb JH |
170 | the hierarchy is stored for us behind our back. This point |
171 | creates a hierarchy point for this function. */ | |
172 | ||
f3ebb786 | 173 | rs_point = store_mark(); |
0756eb3c PH |
174 | |
175 | /* loop until either we get to the end of the list, or we match the | |
6a2c32cb JH |
176 | public name of this authenticator */ |
177 | ||
178 | while ( (buffer = string_nextinlist(&listptr, &i, NULL, 0)) | |
179 | && strcmpic(buffer,ob->server_mech) ); | |
0756eb3c | 180 | |
c0fb53b7 | 181 | if (!buffer) |
0756eb3c PH |
182 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: " |
183 | "Cyrus SASL doesn't know about mechanism %s.", ablock->name, ob->server_mech); | |
184 | ||
185 | store_reset(rs_point); | |
186 | ||
187 | HDEBUG(D_auth) debug_printf("Cyrus SASL driver %s: %s initialised\n", ablock->name, ablock->public_name); | |
188 | ||
189 | /* make sure that if we get here then we're allowed to advertise. */ | |
190 | ablock->server = TRUE; | |
191 | ||
192 | sasl_dispose(&conn); | |
193 | sasl_done(); | |
194 | } | |
195 | ||
196 | /************************************************* | |
197 | * Server entry point * | |
198 | *************************************************/ | |
199 | ||
200 | /* For interface, see auths/README */ | |
201 | ||
202 | /* note, we don't care too much about memory allocation in this, because this is entirely | |
6a2c32cb | 203 | within a shortlived child */ |
0756eb3c PH |
204 | |
205 | int | |
206 | auth_cyrus_sasl_server(auth_instance *ablock, uschar *data) | |
207 | { | |
208 | auth_cyrus_sasl_options_block *ob = | |
209 | (auth_cyrus_sasl_options_block *)(ablock->options_block); | |
210 | uschar *output, *out2, *input, *clear, *hname; | |
211 | uschar *debug = NULL; /* Stops compiler complaining */ | |
c0fb53b7 | 212 | sasl_callback_t cbs[] = {{SASL_CB_LIST_END, NULL, NULL}}; |
0756eb3c | 213 | sasl_conn_t *conn; |
c0fb53b7 | 214 | char * realm_expanded = NULL; |
d7978c0f | 215 | int rc, firsttime = 1, clen, *negotiated_ssf_ptr = NULL, negotiated_ssf; |
0756eb3c PH |
216 | unsigned int inlen, outlen; |
217 | ||
c0fb53b7 JH |
218 | input = data; |
219 | inlen = Ustrlen(data); | |
0756eb3c | 220 | |
c0fb53b7 | 221 | HDEBUG(D_auth) debug = string_copy(data); |
0756eb3c | 222 | |
c0fb53b7 | 223 | hname = expand_string(ob->server_hostname); |
4c287009 | 224 | if (hname && ob->server_realm) |
c0fb53b7 JH |
225 | realm_expanded = CS expand_string(ob->server_realm); |
226 | if (!hname || !realm_expanded && ob->server_realm) | |
0756eb3c PH |
227 | { |
228 | auth_defer_msg = expand_string_message; | |
229 | return DEFER; | |
230 | } | |
231 | ||
c0fb53b7 | 232 | if (inlen) |
0756eb3c | 233 | { |
c0fb53b7 | 234 | if ((clen = b64decode(input, &clear)) < 0) |
0756eb3c | 235 | return BAD64; |
c0fb53b7 JH |
236 | input = clear; |
237 | inlen = clen; | |
0756eb3c PH |
238 | } |
239 | ||
c0fb53b7 | 240 | if ((rc = sasl_server_init(cbs, "exim")) != SASL_OK) |
0756eb3c PH |
241 | { |
242 | auth_defer_msg = US"couldn't initialise Cyrus SASL library"; | |
243 | return DEFER; | |
244 | } | |
245 | ||
c0fb53b7 | 246 | rc = sasl_server_new(CS ob->server_service, CS hname, realm_expanded, NULL, |
acb1b346 PH |
247 | NULL, NULL, 0, &conn); |
248 | ||
edc33b5f PP |
249 | HDEBUG(D_auth) |
250 | debug_printf("Initialised Cyrus SASL server connection; service=\"%s\" fqdn=\"%s\" realm=\"%s\"\n", | |
4c287009 | 251 | ob->server_service, hname, realm_expanded); |
edc33b5f | 252 | |
c0fb53b7 | 253 | if (rc != SASL_OK ) |
0756eb3c PH |
254 | { |
255 | auth_defer_msg = US"couldn't initialise Cyrus SASL connection"; | |
256 | sasl_done(); | |
257 | return DEFER; | |
258 | } | |
259 | ||
817d9f57 | 260 | if (tls_in.cipher) |
edc33b5f | 261 | { |
c0fb53b7 | 262 | if ((rc = sasl_setprop(conn, SASL_SSF_EXTERNAL, (sasl_ssf_t *) &tls_in.bits)) != SASL_OK) |
edc33b5f PP |
263 | { |
264 | HDEBUG(D_auth) debug_printf("Cyrus SASL EXTERNAL SSF set %d failed: %s\n", | |
817d9f57 | 265 | tls_in.bits, sasl_errstring(rc, NULL, NULL)); |
edc33b5f PP |
266 | auth_defer_msg = US"couldn't set Cyrus SASL EXTERNAL SSF"; |
267 | sasl_done(); | |
268 | return DEFER; | |
269 | } | |
270 | else | |
817d9f57 | 271 | HDEBUG(D_auth) debug_printf("Cyrus SASL set EXTERNAL SSF to %d\n", tls_in.bits); |
6a2c32cb JH |
272 | |
273 | /*XXX Set channel-binding here with sasl_channel_binding_t / SASL_CHANNEL_BINDING | |
274 | Unclear what the "name" element does though, ditto the "critical" flag. */ | |
edc33b5f PP |
275 | } |
276 | else | |
277 | HDEBUG(D_auth) debug_printf("Cyrus SASL: no TLS, no EXTERNAL SSF set\n"); | |
278 | ||
66645890 PP |
279 | /* So sasl_setprop() documents non-shorted IPv6 addresses which is incredibly |
280 | annoying; looking at cyrus-imapd-2.3.x source, the IP address is constructed | |
281 | with their iptostring() function, which just wraps | |
282 | getnameinfo(..., NI_NUMERICHOST|NI_NUMERICSERV), which is equivalent to the | |
283 | inet_ntop which we wrap in our host_ntoa() function. | |
284 | ||
285 | So the docs are too strict and we shouldn't worry about :: contractions. */ | |
286 | ||
287 | /* Set properties for remote and local host-ip;port */ | |
d7978c0f | 288 | for (int i = 0; i < 2; ++i) |
66645890 | 289 | { |
6a2c32cb JH |
290 | int propnum; |
291 | const uschar * label; | |
292 | uschar * address_port; | |
66645890 | 293 | const char *s_err; |
66645890 PP |
294 | |
295 | if (i) | |
296 | { | |
66645890 PP |
297 | propnum = SASL_IPREMOTEPORT; |
298 | label = CUS"peer"; | |
6a2c32cb JH |
299 | address_port = string_sprintf("%s;%d", |
300 | sender_host_address, sender_host_port); | |
66645890 PP |
301 | } |
302 | else | |
303 | { | |
66645890 PP |
304 | propnum = SASL_IPLOCALPORT; |
305 | label = CUS"local"; | |
6a2c32cb | 306 | address_port = string_sprintf("%s;%d", interface_address, interface_port); |
66645890 PP |
307 | } |
308 | ||
c0fb53b7 | 309 | if ((rc = sasl_setprop(conn, propnum, address_port)) != SASL_OK) |
66645890 | 310 | { |
66645890 | 311 | HDEBUG(D_auth) |
6a2c32cb JH |
312 | { |
313 | s_err = sasl_errdetail(conn); | |
66645890 PP |
314 | debug_printf("Failed to set %s SASL property: [%d] %s\n", |
315 | label, rc, s_err ? s_err : "<unknown reason>"); | |
6a2c32cb | 316 | } |
66645890 PP |
317 | break; |
318 | } | |
319 | HDEBUG(D_auth) debug_printf("Cyrus SASL set %s hostport to: %s\n", | |
320 | label, address_port); | |
321 | } | |
322 | ||
c0fb53b7 | 323 | for (rc = SASL_CONTINUE; rc == SASL_CONTINUE; ) |
0756eb3c | 324 | { |
c0fb53b7 | 325 | if (firsttime) |
0756eb3c | 326 | { |
c0fb53b7 | 327 | firsttime = 0; |
0756eb3c | 328 | HDEBUG(D_auth) debug_printf("Calling sasl_server_start(%s,\"%s\")\n", ob->server_mech, debug); |
3d2e82c5 JH |
329 | rc = sasl_server_start(conn, CS ob->server_mech, inlen ? CS input : NULL, inlen, |
330 | CCSS &output, &outlen); | |
0756eb3c PH |
331 | } |
332 | else | |
333 | { | |
5c329a43 JH |
334 | /* auth_get_data() takes a length-specfied block of binary |
335 | which can include zeroes; no terminating NUL is needed */ | |
c0fb53b7 | 336 | |
5c329a43 | 337 | if ((rc = auth_get_data(&input, output, outlen)) != OK) |
0756eb3c PH |
338 | { |
339 | /* we couldn't get the data, so free up the library before | |
6a2c32cb | 340 | returning whatever error we get */ |
0756eb3c PH |
341 | sasl_dispose(&conn); |
342 | sasl_done(); | |
343 | return rc; | |
344 | } | |
c0fb53b7 | 345 | inlen = Ustrlen(input); |
0756eb3c | 346 | |
c0fb53b7 JH |
347 | HDEBUG(D_auth) debug = string_copy(input); |
348 | if (inlen) | |
0756eb3c | 349 | { |
c0fb53b7 | 350 | if ((clen = b64decode(input, &clear)) < 0) |
0756eb3c | 351 | { |
c0fb53b7 JH |
352 | sasl_dispose(&conn); |
353 | sasl_done(); | |
0756eb3c PH |
354 | return BAD64; |
355 | } | |
c0fb53b7 JH |
356 | input = clear; |
357 | inlen = clen; | |
0756eb3c PH |
358 | } |
359 | ||
360 | HDEBUG(D_auth) debug_printf("Calling sasl_server_step(\"%s\")\n", debug); | |
3d2e82c5 | 361 | rc = sasl_server_step(conn, CS input, inlen, CCSS &output, &outlen); |
0756eb3c | 362 | } |
c0fb53b7 JH |
363 | |
364 | if (rc == SASL_BADPROT) | |
0756eb3c PH |
365 | { |
366 | sasl_dispose(&conn); | |
367 | sasl_done(); | |
368 | return UNEXPECTED; | |
369 | } | |
c0fb53b7 JH |
370 | if (rc == SASL_CONTINUE) |
371 | continue; | |
372 | ||
373 | /* Get the username and copy it into $auth1 and $1. The former is now the | |
374 | preferred variable; the latter is the original variable. */ | |
375 | ||
5c329a43 | 376 | if ((sasl_getprop(conn, SASL_USERNAME, (const void **)&out2)) != SASL_OK) |
0756eb3c | 377 | { |
0756eb3c | 378 | HDEBUG(D_auth) |
c0fb53b7 JH |
379 | debug_printf("Cyrus SASL library will not tell us the username: %s\n", |
380 | sasl_errstring(rc, NULL, NULL)); | |
0756eb3c | 381 | log_write(0, LOG_REJECT, "%s authenticator (%s):\n " |
c0fb53b7 | 382 | "Cyrus SASL username fetch problem: %s", ablock->name, ob->server_mech, |
0756eb3c PH |
383 | sasl_errstring(rc, NULL, NULL)); |
384 | sasl_dispose(&conn); | |
385 | sasl_done(); | |
386 | return FAIL; | |
387 | } | |
c0fb53b7 JH |
388 | auth_vars[0] = expand_nstring[1] = string_copy(out2); |
389 | expand_nlength[1] = Ustrlen(out2); | |
390 | expand_nmax = 1; | |
391 | ||
392 | switch (rc) | |
0756eb3c | 393 | { |
c0fb53b7 JH |
394 | case SASL_FAIL: case SASL_BUFOVER: case SASL_BADMAC: case SASL_BADAUTH: |
395 | case SASL_NOAUTHZ: case SASL_ENCRYPT: case SASL_EXPIRED: | |
396 | case SASL_DISABLED: case SASL_NOUSER: | |
397 | /* these are considered permanent failure codes */ | |
edc33b5f | 398 | HDEBUG(D_auth) |
c0fb53b7 | 399 | debug_printf("Cyrus SASL permanent failure %d (%s)\n", rc, sasl_errstring(rc, NULL, NULL)); |
edc33b5f | 400 | log_write(0, LOG_REJECT, "%s authenticator (%s):\n " |
c0fb53b7 JH |
401 | "Cyrus SASL permanent failure: %s", ablock->name, ob->server_mech, |
402 | sasl_errstring(rc, NULL, NULL)); | |
edc33b5f PP |
403 | sasl_dispose(&conn); |
404 | sasl_done(); | |
405 | return FAIL; | |
0756eb3c | 406 | |
c0fb53b7 JH |
407 | case SASL_NOMECH: |
408 | /* this is a temporary failure, because the mechanism is not | |
6a2c32cb JH |
409 | available for this user. If it wasn't available at all, we |
410 | shouldn't have got here in the first place... */ | |
411 | ||
edc33b5f | 412 | HDEBUG(D_auth) |
c0fb53b7 JH |
413 | debug_printf("Cyrus SASL temporary failure %d (%s)\n", rc, sasl_errstring(rc, NULL, NULL)); |
414 | auth_defer_msg = | |
415 | string_sprintf("Cyrus SASL: mechanism %s not available", ob->server_mech); | |
edc33b5f PP |
416 | sasl_dispose(&conn); |
417 | sasl_done(); | |
c0fb53b7 JH |
418 | return DEFER; |
419 | ||
420 | case SASL_OK: | |
edc33b5f | 421 | HDEBUG(D_auth) |
c0fb53b7 JH |
422 | debug_printf("Cyrus SASL %s authentication succeeded for %s\n", |
423 | ob->server_mech, auth_vars[0]); | |
424 | ||
425 | if ((rc = sasl_getprop(conn, SASL_SSF, (const void **)(&negotiated_ssf_ptr)))!= SASL_OK) | |
426 | { | |
427 | HDEBUG(D_auth) | |
428 | debug_printf("Cyrus SASL library will not tell us the SSF: %s\n", | |
429 | sasl_errstring(rc, NULL, NULL)); | |
430 | log_write(0, LOG_REJECT, "%s authenticator (%s):\n " | |
431 | "Cyrus SASL SSF value not available: %s", ablock->name, ob->server_mech, | |
432 | sasl_errstring(rc, NULL, NULL)); | |
433 | sasl_dispose(&conn); | |
434 | sasl_done(); | |
435 | return FAIL; | |
436 | } | |
437 | negotiated_ssf = *negotiated_ssf_ptr; | |
438 | HDEBUG(D_auth) | |
439 | debug_printf("Cyrus SASL %s negotiated SSF: %d\n", ob->server_mech, negotiated_ssf); | |
440 | if (negotiated_ssf > 0) | |
441 | { | |
442 | HDEBUG(D_auth) | |
443 | debug_printf("Exim does not implement SASL wrapping (needed for SSF %d).\n", negotiated_ssf); | |
444 | log_write(0, LOG_REJECT, "%s authenticator (%s):\n " | |
445 | "Cyrus SASL SSF %d not supported by Exim", ablock->name, ob->server_mech, negotiated_ssf); | |
446 | sasl_dispose(&conn); | |
447 | sasl_done(); | |
448 | return FAIL; | |
449 | } | |
450 | ||
451 | /* close down the connection, freeing up library's memory */ | |
edc33b5f PP |
452 | sasl_dispose(&conn); |
453 | sasl_done(); | |
edc33b5f | 454 | |
c0fb53b7 JH |
455 | /* Expand server_condition as an authorization check */ |
456 | return auth_check_serv_cond(ablock); | |
16ff981e | 457 | |
c0fb53b7 JH |
458 | default: |
459 | /* Anything else is a temporary failure, and we'll let SASL print out | |
460 | * the error string for us | |
461 | */ | |
462 | HDEBUG(D_auth) | |
463 | debug_printf("Cyrus SASL temporary failure %d (%s)\n", rc, sasl_errstring(rc, NULL, NULL)); | |
464 | auth_defer_msg = | |
465 | string_sprintf("Cyrus SASL: %s", sasl_errstring(rc, NULL, NULL)); | |
466 | sasl_dispose(&conn); | |
467 | sasl_done(); | |
468 | return DEFER; | |
0756eb3c PH |
469 | } |
470 | } | |
471 | /* NOTREACHED */ | |
472 | return 0; /* Stop compiler complaints */ | |
473 | } | |
474 | ||
6545de78 PP |
475 | /************************************************* |
476 | * Diagnostic API * | |
477 | *************************************************/ | |
478 | ||
479 | void | |
480 | auth_cyrus_sasl_version_report(FILE *f) | |
481 | { | |
c0fb53b7 JH |
482 | const char *implementation, *version; |
483 | sasl_version_info(&implementation, &version, NULL, NULL, NULL, NULL); | |
484 | fprintf(f, "Library version: Cyrus SASL: Compile: %d.%d.%d\n" | |
485 | " Runtime: %s [%s]\n", | |
486 | SASL_VERSION_MAJOR, SASL_VERSION_MINOR, SASL_VERSION_STEP, | |
487 | version, implementation); | |
6545de78 PP |
488 | } |
489 | ||
0756eb3c PH |
490 | /************************************************* |
491 | * Client entry point * | |
492 | *************************************************/ | |
493 | ||
494 | /* For interface, see auths/README */ | |
495 | ||
496 | int | |
497 | auth_cyrus_sasl_client( | |
498 | auth_instance *ablock, /* authenticator block */ | |
251b9eb4 | 499 | void * sx, /* connexction */ |
0756eb3c | 500 | int timeout, /* command timeout */ |
d7978c0f | 501 | uschar *buffer, /* for reading response */ |
0756eb3c PH |
502 | int buffsize) /* size of buffer */ |
503 | { | |
504 | /* We don't support clients (yet) in this implementation of cyrus_sasl */ | |
505 | return FAIL; | |
506 | } | |
507 | ||
d185889f | 508 | #endif /*!MACRO_PREDEF*/ |
0756eb3c PH |
509 | #endif /* AUTH_CYRUS_SASL */ |
510 | ||
511 | /* End of cyrus_sasl.c */ |