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8af55556 | 1 | /* GnuTLS glue for GNU Emacs. |
73b0cd50 | 2 | Copyright (C) 2010-2011 Free Software Foundation, Inc. |
8af55556 TZ |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software: you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation, either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <config.h> | |
20 | #include <errno.h> | |
21 | #include <setjmp.h> | |
22 | ||
23 | #include "lisp.h" | |
24 | #include "process.h" | |
25 | ||
26 | #ifdef HAVE_GNUTLS | |
27 | #include <gnutls/gnutls.h> | |
28 | ||
e061a11b TZ |
29 | #ifdef WINDOWSNT |
30 | #include <windows.h> | |
31 | #include "w32.h" | |
32 | #endif | |
33 | ||
34 | static int | |
35 | emacs_gnutls_handle_error (gnutls_session_t, int err); | |
36 | ||
0898ca10 | 37 | static Lisp_Object Qgnutls_dll; |
bafcf6a5 JB |
38 | static Lisp_Object Qgnutls_log_level; |
39 | static Lisp_Object Qgnutls_code; | |
40 | static Lisp_Object Qgnutls_anon, Qgnutls_x509pki; | |
41 | static Lisp_Object Qgnutls_e_interrupted, Qgnutls_e_again, | |
8af55556 | 42 | Qgnutls_e_invalid_session, Qgnutls_e_not_ready_for_handshake; |
bafcf6a5 | 43 | static int gnutls_global_initialized; |
8af55556 | 44 | |
c1ae068b | 45 | /* The following are for the property list of `gnutls-boot'. */ |
bafcf6a5 JB |
46 | static Lisp_Object Qgnutls_bootprop_priority; |
47 | static Lisp_Object Qgnutls_bootprop_trustfiles; | |
ff4de4aa TZ |
48 | static Lisp_Object Qgnutls_bootprop_keylist; |
49 | static Lisp_Object Qgnutls_bootprop_crlfiles; | |
bafcf6a5 JB |
50 | static Lisp_Object Qgnutls_bootprop_callbacks; |
51 | static Lisp_Object Qgnutls_bootprop_loglevel; | |
52 | static Lisp_Object Qgnutls_bootprop_hostname; | |
53 | static Lisp_Object Qgnutls_bootprop_verify_flags; | |
54 | static Lisp_Object Qgnutls_bootprop_verify_error; | |
55 | static Lisp_Object Qgnutls_bootprop_verify_hostname_error; | |
e061a11b TZ |
56 | |
57 | /* Callback keys for `gnutls-boot'. Unused currently. */ | |
bafcf6a5 | 58 | static Lisp_Object Qgnutls_bootprop_callbacks_verify; |
c1ae068b | 59 | |
0898ca10 JB |
60 | static void gnutls_log_function (int, const char *); |
61 | static void gnutls_log_function2 (int, const char*, const char*); | |
62 | ||
63 | \f | |
64 | #ifdef WINDOWSNT | |
65 | ||
66 | /* Macro for defining functions that will be loaded from the GnuTLS DLL. */ | |
67 | #define DEF_GNUTLS_FN(rettype,func,args) rettype (FAR CDECL *fn_##func)args | |
68 | ||
69 | /* Macro for loading GnuTLS functions from the library. */ | |
70 | #define LOAD_GNUTLS_FN(lib,func) { \ | |
71 | fn_##func = (void *) GetProcAddress (lib, #func); \ | |
72 | if (!fn_##func) return 0; \ | |
73 | } | |
74 | ||
75 | DEF_GNUTLS_FN (gnutls_alert_description_t, gnutls_alert_get, | |
76 | (gnutls_session_t)); | |
77 | DEF_GNUTLS_FN (const char *, gnutls_alert_get_name, | |
78 | (gnutls_alert_description_t)); | |
79 | DEF_GNUTLS_FN (int, gnutls_alert_send_appropriate, (gnutls_session_t, int)); | |
80 | DEF_GNUTLS_FN (int, gnutls_anon_allocate_client_credentials, | |
81 | (gnutls_anon_client_credentials_t *)); | |
82 | DEF_GNUTLS_FN (void, gnutls_anon_free_client_credentials, | |
83 | (gnutls_anon_client_credentials_t)); | |
84 | DEF_GNUTLS_FN (int, gnutls_bye, (gnutls_session_t, gnutls_close_request_t)); | |
85 | DEF_GNUTLS_FN (int, gnutls_certificate_allocate_credentials, | |
86 | (gnutls_certificate_credentials_t *)); | |
87 | DEF_GNUTLS_FN (void, gnutls_certificate_free_credentials, | |
88 | (gnutls_certificate_credentials_t)); | |
89 | DEF_GNUTLS_FN (const gnutls_datum_t *, gnutls_certificate_get_peers, | |
90 | (gnutls_session_t, unsigned int *)); | |
91 | DEF_GNUTLS_FN (void, gnutls_certificate_set_verify_flags, | |
92 | (gnutls_certificate_credentials_t, unsigned int)); | |
93 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_crl_file, | |
94 | (gnutls_certificate_credentials_t, const char *, | |
95 | gnutls_x509_crt_fmt_t)); | |
96 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_key_file, | |
97 | (gnutls_certificate_credentials_t, const char *, const char *, | |
98 | gnutls_x509_crt_fmt_t)); | |
99 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_trust_file, | |
100 | (gnutls_certificate_credentials_t, const char *, | |
101 | gnutls_x509_crt_fmt_t)); | |
102 | DEF_GNUTLS_FN (gnutls_certificate_type_t, gnutls_certificate_type_get, | |
103 | (gnutls_session_t)); | |
104 | DEF_GNUTLS_FN (int, gnutls_certificate_verify_peers2, | |
105 | (gnutls_session_t, unsigned int *)); | |
106 | DEF_GNUTLS_FN (int, gnutls_credentials_set, | |
107 | (gnutls_session_t, gnutls_credentials_type_t, void *)); | |
108 | DEF_GNUTLS_FN (void, gnutls_deinit, (gnutls_session_t)); | |
109 | DEF_GNUTLS_FN (int, gnutls_error_is_fatal, (int)); | |
110 | DEF_GNUTLS_FN (int, gnutls_global_init, (void)); | |
111 | DEF_GNUTLS_FN (void, gnutls_global_set_log_function, (gnutls_log_func)); | |
112 | DEF_GNUTLS_FN (void, gnutls_global_set_log_level, (int)); | |
113 | DEF_GNUTLS_FN (int, gnutls_handshake, (gnutls_session_t)); | |
114 | DEF_GNUTLS_FN (int, gnutls_init, (gnutls_session_t *, gnutls_connection_end_t)); | |
115 | DEF_GNUTLS_FN (int, gnutls_priority_set_direct, | |
116 | (gnutls_session_t, const char *, const char **)); | |
117 | DEF_GNUTLS_FN (size_t, gnutls_record_check_pending, (gnutls_session_t)); | |
118 | DEF_GNUTLS_FN (ssize_t, gnutls_record_recv, (gnutls_session_t, void *, size_t)); | |
119 | DEF_GNUTLS_FN (ssize_t, gnutls_record_send, | |
120 | (gnutls_session_t, const void *, size_t)); | |
121 | DEF_GNUTLS_FN (const char *, gnutls_strerror, (int)); | |
122 | DEF_GNUTLS_FN (void, gnutls_transport_set_errno, (gnutls_session_t, int)); | |
123 | DEF_GNUTLS_FN (void, gnutls_transport_set_lowat, (gnutls_session_t, int)); | |
124 | DEF_GNUTLS_FN (void, gnutls_transport_set_ptr2, | |
125 | (gnutls_session_t, gnutls_transport_ptr_t, | |
126 | gnutls_transport_ptr_t)); | |
127 | DEF_GNUTLS_FN (void, gnutls_transport_set_pull_function, | |
128 | (gnutls_session_t, gnutls_pull_func)); | |
129 | DEF_GNUTLS_FN (void, gnutls_transport_set_push_function, | |
130 | (gnutls_session_t, gnutls_push_func)); | |
131 | DEF_GNUTLS_FN (int, gnutls_x509_crt_check_hostname, | |
132 | (gnutls_x509_crt_t, const char *)); | |
133 | DEF_GNUTLS_FN (void, gnutls_x509_crt_deinit, (gnutls_x509_crt_t)); | |
134 | DEF_GNUTLS_FN (int, gnutls_x509_crt_import, | |
135 | (gnutls_x509_crt_t, const gnutls_datum_t *, | |
136 | gnutls_x509_crt_fmt_t)); | |
137 | DEF_GNUTLS_FN (int, gnutls_x509_crt_init, (gnutls_x509_crt_t *)); | |
138 | ||
139 | static int | |
140 | init_gnutls_functions (Lisp_Object libraries) | |
141 | { | |
142 | HMODULE library; | |
143 | ||
144 | if (!(library = w32_delayed_load (libraries, Qgnutls_dll))) | |
145 | { | |
146 | GNUTLS_LOG (1, 1, "GnuTLS library not found"); | |
147 | return 0; | |
148 | } | |
149 | ||
150 | LOAD_GNUTLS_FN (library, gnutls_alert_get); | |
151 | LOAD_GNUTLS_FN (library, gnutls_alert_get_name); | |
152 | LOAD_GNUTLS_FN (library, gnutls_alert_send_appropriate); | |
153 | LOAD_GNUTLS_FN (library, gnutls_anon_allocate_client_credentials); | |
154 | LOAD_GNUTLS_FN (library, gnutls_anon_free_client_credentials); | |
155 | LOAD_GNUTLS_FN (library, gnutls_bye); | |
156 | LOAD_GNUTLS_FN (library, gnutls_certificate_allocate_credentials); | |
157 | LOAD_GNUTLS_FN (library, gnutls_certificate_free_credentials); | |
158 | LOAD_GNUTLS_FN (library, gnutls_certificate_get_peers); | |
159 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_verify_flags); | |
160 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_crl_file); | |
161 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_key_file); | |
162 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_trust_file); | |
163 | LOAD_GNUTLS_FN (library, gnutls_certificate_type_get); | |
164 | LOAD_GNUTLS_FN (library, gnutls_certificate_verify_peers2); | |
165 | LOAD_GNUTLS_FN (library, gnutls_credentials_set); | |
166 | LOAD_GNUTLS_FN (library, gnutls_deinit); | |
167 | LOAD_GNUTLS_FN (library, gnutls_error_is_fatal); | |
168 | LOAD_GNUTLS_FN (library, gnutls_global_init); | |
169 | LOAD_GNUTLS_FN (library, gnutls_global_set_log_function); | |
170 | LOAD_GNUTLS_FN (library, gnutls_global_set_log_level); | |
171 | LOAD_GNUTLS_FN (library, gnutls_handshake); | |
172 | LOAD_GNUTLS_FN (library, gnutls_init); | |
173 | LOAD_GNUTLS_FN (library, gnutls_priority_set_direct); | |
174 | LOAD_GNUTLS_FN (library, gnutls_record_check_pending); | |
175 | LOAD_GNUTLS_FN (library, gnutls_record_recv); | |
176 | LOAD_GNUTLS_FN (library, gnutls_record_send); | |
177 | LOAD_GNUTLS_FN (library, gnutls_strerror); | |
178 | LOAD_GNUTLS_FN (library, gnutls_transport_set_errno); | |
179 | LOAD_GNUTLS_FN (library, gnutls_transport_set_lowat); | |
180 | LOAD_GNUTLS_FN (library, gnutls_transport_set_ptr2); | |
181 | LOAD_GNUTLS_FN (library, gnutls_transport_set_pull_function); | |
182 | LOAD_GNUTLS_FN (library, gnutls_transport_set_push_function); | |
183 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_check_hostname); | |
184 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_deinit); | |
185 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_import); | |
186 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_init); | |
187 | ||
188 | GNUTLS_LOG2 (1, 1, "GnuTLS library loaded:", | |
189 | SDATA (Fget (Qgnutls_dll, QCloaded_from))); | |
190 | return 1; | |
191 | } | |
192 | ||
193 | #else /* !WINDOWSNT */ | |
194 | ||
195 | #define fn_gnutls_alert_get gnutls_alert_get | |
196 | #define fn_gnutls_alert_get_name gnutls_alert_get_name | |
197 | #define fn_gnutls_alert_send_appropriate gnutls_alert_send_appropriate | |
198 | #define fn_gnutls_anon_allocate_client_credentials gnutls_anon_allocate_client_credentials | |
199 | #define fn_gnutls_anon_free_client_credentials gnutls_anon_free_client_credentials | |
200 | #define fn_gnutls_bye gnutls_bye | |
201 | #define fn_gnutls_certificate_allocate_credentials gnutls_certificate_allocate_credentials | |
202 | #define fn_gnutls_certificate_free_credentials gnutls_certificate_free_credentials | |
203 | #define fn_gnutls_certificate_get_peers gnutls_certificate_get_peers | |
204 | #define fn_gnutls_certificate_set_verify_flags gnutls_certificate_set_verify_flags | |
205 | #define fn_gnutls_certificate_set_x509_crl_file gnutls_certificate_set_x509_crl_file | |
206 | #define fn_gnutls_certificate_set_x509_trust_file gnutls_certificate_set_x509_trust_file | |
207 | #define fn_gnutls_certificate_type_get gnutls_certificate_type_get | |
208 | #define fn_gnutls_certificate_verify_peers2 gnutls_certificate_verify_peers2 | |
209 | #define fn_gnutls_credentials_set gnutls_credentials_set | |
210 | #define fn_gnutls_deinit gnutls_deinit | |
211 | #define fn_gnutls_error_is_fatal gnutls_error_is_fatal | |
212 | #define fn_gnutls_global_init gnutls_global_init | |
213 | #define fn_gnutls_global_set_log_function gnutls_global_set_log_function | |
214 | #define fn_gnutls_global_set_log_level gnutls_global_set_log_level | |
215 | #define fn_gnutls_handshake gnutls_handshake | |
216 | #define fn_gnutls_init gnutls_init | |
217 | #define fn_gnutls_priority_set_direct gnutls_priority_set_direct | |
218 | #define fn_gnutls_record_check_pending gnutls_record_check_pending | |
219 | #define fn_gnutls_record_recv gnutls_record_recv | |
220 | #define fn_gnutls_record_send gnutls_record_send | |
221 | #define fn_gnutls_strerror gnutls_strerror | |
222 | #define fn_gnutls_transport_set_errno gnutls_transport_set_errno | |
223 | #define fn_gnutls_transport_set_lowat gnutls_transport_set_lowat | |
224 | #define fn_gnutls_transport_set_ptr2 gnutls_transport_set_ptr2 | |
225 | #define fn_gnutls_transport_set_pull_function gnutls_transport_set_pull_function | |
226 | #define fn_gnutls_transport_set_push_function gnutls_transport_set_push_function | |
227 | #define fn_gnutls_x509_crt_check_hostname gnutls_x509_crt_check_hostname | |
228 | #define fn_gnutls_x509_crt_deinit gnutls_x509_crt_deinit | |
229 | #define fn_gnutls_x509_crt_import gnutls_x509_crt_import | |
230 | #define fn_gnutls_x509_crt_init gnutls_x509_crt_init | |
231 | ||
232 | #endif /* !WINDOWSNT */ | |
233 | ||
234 | \f | |
74f1829d | 235 | static void |
e061a11b TZ |
236 | gnutls_log_function (int level, const char* string) |
237 | { | |
238 | message ("gnutls.c: [%d] %s", level, string); | |
239 | } | |
240 | ||
241 | static void | |
242 | gnutls_log_function2 (int level, const char* string, const char* extra) | |
243 | { | |
244 | message ("gnutls.c: [%d] %s %s", level, string, extra); | |
245 | } | |
246 | ||
247 | static int | |
bac5cef8 LMI |
248 | emacs_gnutls_handshake (struct Lisp_Process *proc) |
249 | { | |
250 | gnutls_session_t state = proc->gnutls_state; | |
251 | int ret; | |
252 | ||
253 | if (proc->gnutls_initstage < GNUTLS_STAGE_HANDSHAKE_CANDO) | |
6a7a1b0b | 254 | return -1; |
bac5cef8 LMI |
255 | |
256 | if (proc->gnutls_initstage < GNUTLS_STAGE_TRANSPORT_POINTERS_SET) | |
e6059fa2 | 257 | { |
e061a11b TZ |
258 | #ifdef WINDOWSNT |
259 | /* On W32 we cannot transfer socket handles between different runtime | |
260 | libraries, so we tell GnuTLS to use our special push/pull | |
261 | functions. */ | |
0898ca10 JB |
262 | fn_gnutls_transport_set_ptr2 (state, |
263 | (gnutls_transport_ptr_t) proc, | |
264 | (gnutls_transport_ptr_t) proc); | |
265 | fn_gnutls_transport_set_push_function (state, &emacs_gnutls_push); | |
266 | fn_gnutls_transport_set_pull_function (state, &emacs_gnutls_pull); | |
e061a11b TZ |
267 | |
268 | /* For non blocking sockets or other custom made pull/push | |
269 | functions the gnutls_transport_set_lowat must be called, with | |
270 | a zero low water mark value. (GnuTLS 2.10.4 documentation) | |
271 | ||
272 | (Note: this is probably not strictly necessary as the lowat | |
273 | value is only used when no custom pull/push functions are | |
274 | set.) */ | |
0898ca10 | 275 | fn_gnutls_transport_set_lowat (state, 0); |
e061a11b | 276 | #else |
c1ae068b LMI |
277 | /* This is how GnuTLS takes sockets: as file descriptors passed |
278 | in. For an Emacs process socket, infd and outfd are the | |
279 | same but we use this two-argument version for clarity. */ | |
0898ca10 JB |
280 | fn_gnutls_transport_set_ptr2 (state, |
281 | (gnutls_transport_ptr_t) (long) proc->infd, | |
282 | (gnutls_transport_ptr_t) (long) proc->outfd); | |
e061a11b | 283 | #endif |
bac5cef8 | 284 | |
e6059fa2 LMI |
285 | proc->gnutls_initstage = GNUTLS_STAGE_TRANSPORT_POINTERS_SET; |
286 | } | |
bac5cef8 | 287 | |
e061a11b TZ |
288 | do |
289 | { | |
0898ca10 | 290 | ret = fn_gnutls_handshake (state); |
e061a11b TZ |
291 | emacs_gnutls_handle_error (state, ret); |
292 | } | |
0898ca10 | 293 | while (ret < 0 && fn_gnutls_error_is_fatal (ret) == 0); |
e061a11b | 294 | |
bac5cef8 LMI |
295 | proc->gnutls_initstage = GNUTLS_STAGE_HANDSHAKE_TRIED; |
296 | ||
297 | if (ret == GNUTLS_E_SUCCESS) | |
e6059fa2 | 298 | { |
e061a11b | 299 | /* Here we're finally done. */ |
e6059fa2 LMI |
300 | proc->gnutls_initstage = GNUTLS_STAGE_READY; |
301 | } | |
e061a11b TZ |
302 | else |
303 | { | |
0898ca10 | 304 | fn_gnutls_alert_send_appropriate (state, ret); |
e061a11b TZ |
305 | } |
306 | return ret; | |
bac5cef8 LMI |
307 | } |
308 | ||
0898ca10 JB |
309 | int |
310 | emacs_gnutls_record_check_pending (gnutls_session_t state) | |
311 | { | |
312 | return fn_gnutls_record_check_pending (state); | |
313 | } | |
314 | ||
315 | void | |
316 | emacs_gnutls_transport_set_errno (gnutls_session_t state, int err) | |
317 | { | |
318 | fn_gnutls_transport_set_errno (state, err); | |
319 | } | |
320 | ||
9587a89d | 321 | EMACS_INT |
368f4090 | 322 | emacs_gnutls_write (int fildes, struct Lisp_Process *proc, const char *buf, |
9587a89d | 323 | EMACS_INT nbyte) |
8af55556 | 324 | { |
c8926152 | 325 | ssize_t rtnval = 0; |
9587a89d | 326 | EMACS_INT bytes_written; |
df7fcaff LMI |
327 | gnutls_session_t state = proc->gnutls_state; |
328 | ||
355cdaf3 LMI |
329 | if (proc->gnutls_initstage != GNUTLS_STAGE_READY) { |
330 | #ifdef EWOULDBLOCK | |
331 | errno = EWOULDBLOCK; | |
332 | #endif | |
333 | #ifdef EAGAIN | |
334 | errno = EAGAIN; | |
335 | #endif | |
273a5f82 | 336 | return 0; |
355cdaf3 | 337 | } |
8af55556 TZ |
338 | |
339 | bytes_written = 0; | |
340 | ||
341 | while (nbyte > 0) | |
342 | { | |
0898ca10 | 343 | rtnval = fn_gnutls_record_send (state, buf, nbyte); |
8af55556 | 344 | |
2e6c74c5 | 345 | if (rtnval < 0) |
8af55556 | 346 | { |
2e6c74c5 | 347 | if (rtnval == GNUTLS_E_AGAIN || rtnval == GNUTLS_E_INTERRUPTED) |
8af55556 TZ |
348 | continue; |
349 | else | |
273a5f82 | 350 | break; |
8af55556 TZ |
351 | } |
352 | ||
353 | buf += rtnval; | |
354 | nbyte -= rtnval; | |
355 | bytes_written += rtnval; | |
356 | } | |
8af55556 | 357 | |
e061a11b | 358 | emacs_gnutls_handle_error (state, rtnval); |
8af55556 TZ |
359 | return (bytes_written); |
360 | } | |
361 | ||
9587a89d | 362 | EMACS_INT |
df7fcaff | 363 | emacs_gnutls_read (int fildes, struct Lisp_Process *proc, char *buf, |
9587a89d | 364 | EMACS_INT nbyte) |
8af55556 | 365 | { |
368f4090 | 366 | ssize_t rtnval; |
df7fcaff LMI |
367 | gnutls_session_t state = proc->gnutls_state; |
368 | ||
e6059fa2 LMI |
369 | if (proc->gnutls_initstage != GNUTLS_STAGE_READY) |
370 | { | |
371 | emacs_gnutls_handshake (proc); | |
372 | return -1; | |
373 | } | |
0898ca10 | 374 | rtnval = fn_gnutls_record_recv (state, buf, nbyte); |
ec9f09be LMI |
375 | if (rtnval >= 0) |
376 | return rtnval; | |
e061a11b TZ |
377 | else if (emacs_gnutls_handle_error (state, rtnval) == 0) |
378 | /* non-fatal error */ | |
379 | return -1; | |
4b2d9ec2 | 380 | else { |
e061a11b TZ |
381 | /* a fatal error occured */ |
382 | return 0; | |
4b2d9ec2 | 383 | } |
8af55556 TZ |
384 | } |
385 | ||
e061a11b TZ |
386 | /* report a GnuTLS error to the user. |
387 | Returns zero if the error code was successfully handled. */ | |
388 | static int | |
389 | emacs_gnutls_handle_error (gnutls_session_t session, int err) | |
390 | { | |
391 | Lisp_Object gnutls_log_level = Fsymbol_value (Qgnutls_log_level); | |
392 | int max_log_level = 0; | |
393 | ||
0c8c7e5c | 394 | int ret; |
e061a11b TZ |
395 | const char *str; |
396 | ||
397 | /* TODO: use a Lisp_Object generated by gnutls_make_error? */ | |
398 | if (err >= 0) | |
399 | return 0; | |
400 | ||
401 | if (NUMBERP (gnutls_log_level)) | |
402 | max_log_level = XINT (gnutls_log_level); | |
403 | ||
404 | /* TODO: use gnutls-error-fatalp and gnutls-error-string. */ | |
405 | ||
0898ca10 | 406 | str = fn_gnutls_strerror (err); |
e061a11b TZ |
407 | if (!str) |
408 | str = "unknown"; | |
409 | ||
0898ca10 | 410 | if (fn_gnutls_error_is_fatal (err)) |
e061a11b TZ |
411 | { |
412 | ret = err; | |
413 | GNUTLS_LOG2 (0, max_log_level, "fatal error:", str); | |
414 | } | |
415 | else | |
416 | { | |
417 | ret = 0; | |
418 | GNUTLS_LOG2 (1, max_log_level, "non-fatal error:", str); | |
419 | /* TODO: EAGAIN AKA Qgnutls_e_again should be level 2. */ | |
420 | } | |
421 | ||
422 | if (err == GNUTLS_E_WARNING_ALERT_RECEIVED | |
423 | || err == GNUTLS_E_FATAL_ALERT_RECEIVED) | |
424 | { | |
0898ca10 | 425 | int alert = fn_gnutls_alert_get (session); |
e061a11b | 426 | int level = (err == GNUTLS_E_FATAL_ALERT_RECEIVED) ? 0 : 1; |
0898ca10 | 427 | str = fn_gnutls_alert_get_name (alert); |
e061a11b TZ |
428 | if (!str) |
429 | str = "unknown"; | |
430 | ||
431 | GNUTLS_LOG2 (level, max_log_level, "Received alert: ", str); | |
432 | } | |
433 | return ret; | |
434 | } | |
435 | ||
8af55556 TZ |
436 | /* convert an integer error to a Lisp_Object; it will be either a |
437 | known symbol like `gnutls_e_interrupted' and `gnutls_e_again' or | |
438 | simply the integer value of the error. GNUTLS_E_SUCCESS is mapped | |
439 | to Qt. */ | |
74f1829d | 440 | static Lisp_Object |
ec8df744 | 441 | gnutls_make_error (int err) |
8af55556 | 442 | { |
ec8df744 | 443 | switch (err) |
e6059fa2 LMI |
444 | { |
445 | case GNUTLS_E_SUCCESS: | |
446 | return Qt; | |
447 | case GNUTLS_E_AGAIN: | |
448 | return Qgnutls_e_again; | |
449 | case GNUTLS_E_INTERRUPTED: | |
450 | return Qgnutls_e_interrupted; | |
451 | case GNUTLS_E_INVALID_SESSION: | |
452 | return Qgnutls_e_invalid_session; | |
453 | } | |
8af55556 | 454 | |
ec8df744 | 455 | return make_number (err); |
8af55556 TZ |
456 | } |
457 | ||
458 | DEFUN ("gnutls-get-initstage", Fgnutls_get_initstage, Sgnutls_get_initstage, 1, 1, 0, | |
74f1829d | 459 | doc: /* Return the GnuTLS init stage of process PROC. |
8af55556 | 460 | See also `gnutls-boot'. */) |
74f1829d | 461 | (Lisp_Object proc) |
8af55556 TZ |
462 | { |
463 | CHECK_PROCESS (proc); | |
464 | ||
465 | return make_number (GNUTLS_INITSTAGE (proc)); | |
466 | } | |
467 | ||
468 | DEFUN ("gnutls-errorp", Fgnutls_errorp, Sgnutls_errorp, 1, 1, 0, | |
74f1829d JB |
469 | doc: /* Return t if ERROR indicates a GnuTLS problem. |
470 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
471 | usage: (gnutls-errorp ERROR) */) | |
472 | (Lisp_Object err) | |
8af55556 | 473 | { |
74f1829d | 474 | if (EQ (err, Qt)) return Qnil; |
8af55556 TZ |
475 | |
476 | return Qt; | |
477 | } | |
478 | ||
479 | DEFUN ("gnutls-error-fatalp", Fgnutls_error_fatalp, Sgnutls_error_fatalp, 1, 1, 0, | |
74f1829d JB |
480 | doc: /* Check if ERROR is fatal. |
481 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
482 | usage: (gnutls-error-fatalp ERROR) */) | |
483 | (Lisp_Object err) | |
8af55556 TZ |
484 | { |
485 | Lisp_Object code; | |
486 | ||
487 | if (EQ (err, Qt)) return Qnil; | |
488 | ||
489 | if (SYMBOLP (err)) | |
8af55556 | 490 | { |
e6059fa2 LMI |
491 | code = Fget (err, Qgnutls_code); |
492 | if (NUMBERP (code)) | |
493 | { | |
494 | err = code; | |
495 | } | |
496 | else | |
497 | { | |
498 | error ("Symbol has no numeric gnutls-code property"); | |
499 | } | |
8af55556 | 500 | } |
8af55556 TZ |
501 | |
502 | if (!NUMBERP (err)) | |
503 | error ("Not an error symbol or code"); | |
504 | ||
0898ca10 | 505 | if (0 == fn_gnutls_error_is_fatal (XINT (err))) |
8af55556 TZ |
506 | return Qnil; |
507 | ||
508 | return Qt; | |
509 | } | |
510 | ||
511 | DEFUN ("gnutls-error-string", Fgnutls_error_string, Sgnutls_error_string, 1, 1, 0, | |
74f1829d JB |
512 | doc: /* Return a description of ERROR. |
513 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
514 | usage: (gnutls-error-string ERROR) */) | |
515 | (Lisp_Object err) | |
8af55556 TZ |
516 | { |
517 | Lisp_Object code; | |
518 | ||
519 | if (EQ (err, Qt)) return build_string ("Not an error"); | |
520 | ||
521 | if (SYMBOLP (err)) | |
8af55556 | 522 | { |
e6059fa2 LMI |
523 | code = Fget (err, Qgnutls_code); |
524 | if (NUMBERP (code)) | |
525 | { | |
526 | err = code; | |
527 | } | |
528 | else | |
529 | { | |
530 | return build_string ("Symbol has no numeric gnutls-code property"); | |
531 | } | |
8af55556 | 532 | } |
8af55556 TZ |
533 | |
534 | if (!NUMBERP (err)) | |
535 | return build_string ("Not an error symbol or code"); | |
536 | ||
0898ca10 | 537 | return build_string (fn_gnutls_strerror (XINT (err))); |
8af55556 TZ |
538 | } |
539 | ||
540 | DEFUN ("gnutls-deinit", Fgnutls_deinit, Sgnutls_deinit, 1, 1, 0, | |
e1b69165 | 541 | doc: /* Deallocate GnuTLS resources associated with process PROC. |
8af55556 | 542 | See also `gnutls-init'. */) |
74f1829d | 543 | (Lisp_Object proc) |
8af55556 TZ |
544 | { |
545 | gnutls_session_t state; | |
546 | ||
547 | CHECK_PROCESS (proc); | |
548 | state = XPROCESS (proc)->gnutls_state; | |
549 | ||
550 | if (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_INIT) | |
e6059fa2 | 551 | { |
0898ca10 | 552 | fn_gnutls_deinit (state); |
8af55556 | 553 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT - 1; |
e6059fa2 | 554 | } |
8af55556 TZ |
555 | |
556 | return Qt; | |
557 | } | |
558 | ||
0898ca10 JB |
559 | DEFUN ("gnutls-available-p", Fgnutls_available_p, Sgnutls_available_p, 0, 0, 0, |
560 | doc: /* Return t if GnuTLS is available in this instance of Emacs. */) | |
561 | (void) | |
562 | { | |
563 | #ifdef WINDOWSNT | |
564 | Lisp_Object found = Fassq (Qgnutls_dll, Vlibrary_cache); | |
565 | if (CONSP (found)) | |
566 | return XCDR (found); | |
567 | else | |
568 | { | |
569 | Lisp_Object status; | |
570 | status = init_gnutls_functions (Vdynamic_library_alist) ? Qt : Qnil; | |
571 | Vlibrary_cache = Fcons (Fcons (Qgnutls_dll, status), Vlibrary_cache); | |
572 | return status; | |
573 | } | |
574 | #else | |
575 | return Qt; | |
576 | #endif | |
577 | } | |
578 | ||
579 | ||
e1b69165 JB |
580 | /* Initializes global GnuTLS state to defaults. |
581 | Call `gnutls-global-deinit' when GnuTLS usage is no longer needed. | |
8af55556 | 582 | Returns zero on success. */ |
74f1829d | 583 | static Lisp_Object |
e061a11b | 584 | emacs_gnutls_global_init (void) |
8af55556 TZ |
585 | { |
586 | int ret = GNUTLS_E_SUCCESS; | |
587 | ||
e061a11b | 588 | if (!gnutls_global_initialized) |
0898ca10 | 589 | ret = fn_gnutls_global_init (); |
e061a11b | 590 | gnutls_global_initialized = 1; |
8af55556 TZ |
591 | |
592 | return gnutls_make_error (ret); | |
593 | } | |
594 | ||
ec8df744 | 595 | #if 0 |
e1b69165 | 596 | /* Deinitializes global GnuTLS state. |
8af55556 | 597 | See also `gnutls-global-init'. */ |
74f1829d | 598 | static Lisp_Object |
e061a11b | 599 | emacs_gnutls_global_deinit (void) |
8af55556 | 600 | { |
e061a11b | 601 | if (gnutls_global_initialized) |
8af55556 TZ |
602 | gnutls_global_deinit (); |
603 | ||
e061a11b | 604 | gnutls_global_initialized = 0; |
8af55556 TZ |
605 | |
606 | return gnutls_make_error (GNUTLS_E_SUCCESS); | |
607 | } | |
ec8df744 | 608 | #endif |
8af55556 | 609 | |
c1ae068b LMI |
610 | DEFUN ("gnutls-boot", Fgnutls_boot, Sgnutls_boot, 3, 3, 0, |
611 | doc: /* Initialize GnuTLS client for process PROC with TYPE+PROPLIST. | |
8af55556 TZ |
612 | Currently only client mode is supported. Returns a success/failure |
613 | value you can check with `gnutls-errorp'. | |
614 | ||
c1ae068b LMI |
615 | TYPE is a symbol, either `gnutls-anon' or `gnutls-x509pki'. |
616 | PROPLIST is a property list with the following keys: | |
617 | ||
e061a11b TZ |
618 | :hostname is a string naming the remote host. |
619 | ||
c1ae068b | 620 | :priority is a GnuTLS priority string, defaults to "NORMAL". |
e061a11b | 621 | |
c1ae068b | 622 | :trustfiles is a list of PEM-encoded trust files for `gnutls-x509pki'. |
e061a11b | 623 | |
ff4de4aa TZ |
624 | :crlfiles is a list of PEM-encoded CRL lists for `gnutls-x509pki'. |
625 | ||
626 | :keylist is an alist of PEM-encoded key files and PEM-encoded | |
627 | certificates for `gnutls-x509pki'. | |
e061a11b TZ |
628 | |
629 | :callbacks is an alist of callback functions, see below. | |
630 | ||
c1ae068b | 631 | :loglevel is the debug level requested from GnuTLS, try 4. |
8ed70bf3 | 632 | |
e061a11b TZ |
633 | :verify-flags is a bitset as per GnuTLS' |
634 | gnutls_certificate_set_verify_flags. | |
635 | ||
636 | :verify-error, if non-nil, makes failure of the certificate validation | |
637 | an error. Otherwise it will be just a series of warnings. | |
638 | ||
639 | :verify-hostname-error, if non-nil, makes a hostname mismatch an | |
640 | error. Otherwise it will be just a warning. | |
641 | ||
c1ae068b LMI |
642 | The debug level will be set for this process AND globally for GnuTLS. |
643 | So if you set it higher or lower at any point, it affects global | |
644 | debugging. | |
8af55556 TZ |
645 | |
646 | Note that the priority is set on the client. The server does not use | |
647 | the protocols's priority except for disabling protocols that were not | |
648 | specified. | |
649 | ||
74f1829d | 650 | Processes must be initialized with this function before other GnuTLS |
8af55556 TZ |
651 | functions are used. This function allocates resources which can only |
652 | be deallocated by calling `gnutls-deinit' or by calling it again. | |
653 | ||
e061a11b TZ |
654 | The callbacks alist can have a `verify' key, associated with a |
655 | verification function (UNUSED). | |
656 | ||
8af55556 | 657 | Each authentication type may need additional information in order to |
c1ae068b LMI |
658 | work. For X.509 PKI (`gnutls-x509pki'), you probably need at least |
659 | one trustfile (usually a CA bundle). */) | |
660 | (Lisp_Object proc, Lisp_Object type, Lisp_Object proplist) | |
8af55556 TZ |
661 | { |
662 | int ret = GNUTLS_E_SUCCESS; | |
663 | ||
8ed70bf3 LMI |
664 | int max_log_level = 0; |
665 | ||
8af55556 TZ |
666 | /* TODO: GNUTLS_X509_FMT_DER is also an option. */ |
667 | int file_format = GNUTLS_X509_FMT_PEM; | |
668 | ||
e061a11b TZ |
669 | unsigned int gnutls_verify_flags = GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT; |
670 | gnutls_x509_crt_t gnutls_verify_cert; | |
671 | unsigned int gnutls_verify_cert_list_size; | |
672 | const gnutls_datum_t *gnutls_verify_cert_list; | |
673 | ||
8af55556 TZ |
674 | gnutls_session_t state; |
675 | gnutls_certificate_credentials_t x509_cred; | |
676 | gnutls_anon_client_credentials_t anon_cred; | |
8af55556 | 677 | Lisp_Object global_init; |
ec8df744 | 678 | char const *priority_string_ptr = "NORMAL"; /* default priority string. */ |
c1ae068b | 679 | Lisp_Object tail; |
7754e151 | 680 | unsigned int peer_verification; |
e061a11b | 681 | char* c_hostname; |
c1ae068b LMI |
682 | |
683 | /* Placeholders for the property list elements. */ | |
684 | Lisp_Object priority_string; | |
685 | Lisp_Object trustfiles; | |
ff4de4aa TZ |
686 | Lisp_Object crlfiles; |
687 | Lisp_Object keylist; | |
ec8df744 | 688 | /* Lisp_Object callbacks; */ |
c1ae068b | 689 | Lisp_Object loglevel; |
e061a11b TZ |
690 | Lisp_Object hostname; |
691 | Lisp_Object verify_flags; | |
8d4c3955 | 692 | /* Lisp_Object verify_error; */ |
e061a11b | 693 | Lisp_Object verify_hostname_error; |
8af55556 TZ |
694 | |
695 | CHECK_PROCESS (proc); | |
696 | CHECK_SYMBOL (type); | |
c1ae068b LMI |
697 | CHECK_LIST (proplist); |
698 | ||
0898ca10 JB |
699 | if (NILP (Fgnutls_available_p ())) |
700 | { | |
701 | error ("GnuTLS not available"); | |
702 | return gnutls_make_error (GNUTLS_EMACS_ERROR_NOT_LOADED); | |
703 | } | |
704 | ||
e061a11b TZ |
705 | hostname = Fplist_get (proplist, Qgnutls_bootprop_hostname); |
706 | priority_string = Fplist_get (proplist, Qgnutls_bootprop_priority); | |
707 | trustfiles = Fplist_get (proplist, Qgnutls_bootprop_trustfiles); | |
ff4de4aa TZ |
708 | keylist = Fplist_get (proplist, Qgnutls_bootprop_keylist); |
709 | crlfiles = Fplist_get (proplist, Qgnutls_bootprop_crlfiles); | |
671875da | 710 | /* callbacks = Fplist_get (proplist, Qgnutls_bootprop_callbacks); */ |
e061a11b TZ |
711 | loglevel = Fplist_get (proplist, Qgnutls_bootprop_loglevel); |
712 | verify_flags = Fplist_get (proplist, Qgnutls_bootprop_verify_flags); | |
bafcf6a5 | 713 | /* verify_error = Fplist_get (proplist, Qgnutls_bootprop_verify_error); */ |
e061a11b TZ |
714 | verify_hostname_error = Fplist_get (proplist, Qgnutls_bootprop_verify_hostname_error); |
715 | ||
716 | if (!STRINGP (hostname)) | |
717 | error ("gnutls-boot: invalid :hostname parameter"); | |
718 | ||
719 | c_hostname = SSDATA (hostname); | |
8af55556 TZ |
720 | |
721 | state = XPROCESS (proc)->gnutls_state; | |
df7fcaff | 722 | XPROCESS (proc)->gnutls_p = 1; |
8af55556 | 723 | |
8ed70bf3 LMI |
724 | if (NUMBERP (loglevel)) |
725 | { | |
0898ca10 JB |
726 | fn_gnutls_global_set_log_function (gnutls_log_function); |
727 | fn_gnutls_global_set_log_level (XINT (loglevel)); | |
8ed70bf3 LMI |
728 | max_log_level = XINT (loglevel); |
729 | XPROCESS (proc)->gnutls_log_level = max_log_level; | |
730 | } | |
df7fcaff | 731 | |
8af55556 | 732 | /* always initialize globals. */ |
e061a11b | 733 | global_init = emacs_gnutls_global_init (); |
8af55556 TZ |
734 | if (! NILP (Fgnutls_errorp (global_init))) |
735 | return global_init; | |
736 | ||
737 | /* deinit and free resources. */ | |
738 | if (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_CRED_ALLOC) | |
e6059fa2 | 739 | { |
8ed70bf3 LMI |
740 | GNUTLS_LOG (1, max_log_level, "deallocating credentials"); |
741 | ||
8af55556 | 742 | if (EQ (type, Qgnutls_x509pki)) |
e6059fa2 | 743 | { |
8ed70bf3 LMI |
744 | GNUTLS_LOG (2, max_log_level, "deallocating x509 credentials"); |
745 | x509_cred = XPROCESS (proc)->gnutls_x509_cred; | |
0898ca10 | 746 | fn_gnutls_certificate_free_credentials (x509_cred); |
e6059fa2 | 747 | } |
8af55556 | 748 | else if (EQ (type, Qgnutls_anon)) |
e6059fa2 | 749 | { |
8ed70bf3 LMI |
750 | GNUTLS_LOG (2, max_log_level, "deallocating anon credentials"); |
751 | anon_cred = XPROCESS (proc)->gnutls_anon_cred; | |
0898ca10 | 752 | fn_gnutls_anon_free_client_credentials (anon_cred); |
e6059fa2 | 753 | } |
8af55556 | 754 | else |
e6059fa2 | 755 | { |
8af55556 TZ |
756 | error ("unknown credential type"); |
757 | ret = GNUTLS_EMACS_ERROR_INVALID_TYPE; | |
e6059fa2 | 758 | } |
8af55556 TZ |
759 | |
760 | if (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_INIT) | |
e6059fa2 | 761 | { |
8ed70bf3 | 762 | GNUTLS_LOG (1, max_log_level, "deallocating x509 credentials"); |
8af55556 | 763 | Fgnutls_deinit (proc); |
e6059fa2 LMI |
764 | } |
765 | } | |
8af55556 TZ |
766 | |
767 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_EMPTY; | |
768 | ||
8ed70bf3 LMI |
769 | GNUTLS_LOG (1, max_log_level, "allocating credentials"); |
770 | ||
8af55556 | 771 | if (EQ (type, Qgnutls_x509pki)) |
e6059fa2 | 772 | { |
8ed70bf3 LMI |
773 | GNUTLS_LOG (2, max_log_level, "allocating x509 credentials"); |
774 | x509_cred = XPROCESS (proc)->gnutls_x509_cred; | |
0898ca10 | 775 | if (fn_gnutls_certificate_allocate_credentials (&x509_cred) < 0) |
8af55556 | 776 | memory_full (); |
e061a11b TZ |
777 | |
778 | if (NUMBERP (verify_flags)) | |
779 | { | |
780 | gnutls_verify_flags = XINT (verify_flags); | |
781 | GNUTLS_LOG (2, max_log_level, "setting verification flags"); | |
782 | } | |
783 | else if (NILP (verify_flags)) | |
784 | { | |
785 | /* The default is already GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT. */ | |
786 | GNUTLS_LOG (2, max_log_level, "using default verification flags"); | |
787 | } | |
788 | else | |
789 | { | |
790 | /* The default is already GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT. */ | |
791 | GNUTLS_LOG (2, max_log_level, "ignoring invalid verify-flags"); | |
792 | } | |
0898ca10 | 793 | fn_gnutls_certificate_set_verify_flags (x509_cred, gnutls_verify_flags); |
e6059fa2 | 794 | } |
8af55556 | 795 | else if (EQ (type, Qgnutls_anon)) |
e6059fa2 | 796 | { |
8ed70bf3 LMI |
797 | GNUTLS_LOG (2, max_log_level, "allocating anon credentials"); |
798 | anon_cred = XPROCESS (proc)->gnutls_anon_cred; | |
0898ca10 | 799 | if (fn_gnutls_anon_allocate_client_credentials (&anon_cred) < 0) |
8af55556 | 800 | memory_full (); |
e6059fa2 | 801 | } |
8af55556 | 802 | else |
e6059fa2 | 803 | { |
8af55556 TZ |
804 | error ("unknown credential type"); |
805 | ret = GNUTLS_EMACS_ERROR_INVALID_TYPE; | |
e6059fa2 | 806 | } |
8af55556 TZ |
807 | |
808 | if (ret < GNUTLS_E_SUCCESS) | |
e6059fa2 | 809 | return gnutls_make_error (ret); |
8af55556 TZ |
810 | |
811 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_ALLOC; | |
812 | ||
8af55556 | 813 | if (EQ (type, Qgnutls_x509pki)) |
e6059fa2 | 814 | { |
c1ae068b | 815 | for (tail = trustfiles; !NILP (tail); tail = Fcdr (tail)) |
e6059fa2 | 816 | { |
c1ae068b LMI |
817 | Lisp_Object trustfile = Fcar (tail); |
818 | if (STRINGP (trustfile)) | |
819 | { | |
820 | GNUTLS_LOG2 (1, max_log_level, "setting the trustfile: ", | |
ec8df744 | 821 | SSDATA (trustfile)); |
0898ca10 | 822 | ret = fn_gnutls_certificate_set_x509_trust_file |
c1ae068b | 823 | (x509_cred, |
ec8df744 | 824 | SSDATA (trustfile), |
c1ae068b | 825 | file_format); |
51b59d79 | 826 | |
c1ae068b LMI |
827 | if (ret < GNUTLS_E_SUCCESS) |
828 | return gnutls_make_error (ret); | |
829 | } | |
830 | else | |
831 | { | |
832 | error ("Sorry, GnuTLS can't use non-string trustfile %s", | |
c4354cb4 | 833 | SDATA (trustfile)); |
c1ae068b LMI |
834 | } |
835 | } | |
8af55556 | 836 | |
ff4de4aa | 837 | for (tail = crlfiles; !NILP (tail); tail = Fcdr (tail)) |
e6059fa2 | 838 | { |
ff4de4aa TZ |
839 | Lisp_Object crlfile = Fcar (tail); |
840 | if (STRINGP (crlfile)) | |
c1ae068b | 841 | { |
ff4de4aa TZ |
842 | GNUTLS_LOG2 (1, max_log_level, "setting the CRL file: ", |
843 | SSDATA (crlfile)); | |
0898ca10 | 844 | ret = fn_gnutls_certificate_set_x509_crl_file |
c1ae068b | 845 | (x509_cred, |
ff4de4aa TZ |
846 | SSDATA (crlfile), |
847 | file_format); | |
848 | ||
849 | if (ret < GNUTLS_E_SUCCESS) | |
850 | return gnutls_make_error (ret); | |
851 | } | |
852 | else | |
853 | { | |
854 | error ("Sorry, GnuTLS can't use non-string CRL file %s", | |
855 | SDATA (crlfile)); | |
856 | } | |
857 | } | |
858 | ||
859 | for (tail = keylist; !NILP (tail); tail = Fcdr (tail)) | |
860 | { | |
861 | Lisp_Object keyfile = Fcar (Fcar (tail)); | |
862 | Lisp_Object certfile = Fcar (Fcdr (tail)); | |
863 | if (STRINGP (keyfile) && STRINGP (certfile)) | |
864 | { | |
865 | GNUTLS_LOG2 (1, max_log_level, "setting the client key file: ", | |
866 | SSDATA (keyfile)); | |
867 | GNUTLS_LOG2 (1, max_log_level, "setting the client cert file: ", | |
868 | SSDATA (certfile)); | |
0898ca10 | 869 | ret = fn_gnutls_certificate_set_x509_key_file |
ff4de4aa TZ |
870 | (x509_cred, |
871 | SSDATA (certfile), | |
ec8df744 | 872 | SSDATA (keyfile), |
c1ae068b | 873 | file_format); |
51b59d79 | 874 | |
c1ae068b LMI |
875 | if (ret < GNUTLS_E_SUCCESS) |
876 | return gnutls_make_error (ret); | |
877 | } | |
878 | else | |
879 | { | |
ff4de4aa TZ |
880 | if (STRINGP (keyfile)) |
881 | error ("Sorry, GnuTLS can't use non-string client cert file %s", | |
882 | SDATA (certfile)); | |
883 | else | |
884 | error ("Sorry, GnuTLS can't use non-string client key file %s", | |
885 | SDATA (keyfile)); | |
c1ae068b LMI |
886 | } |
887 | } | |
e6059fa2 | 888 | } |
8af55556 TZ |
889 | |
890 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_FILES; | |
891 | ||
e061a11b TZ |
892 | GNUTLS_LOG (1, max_log_level, "gnutls callbacks"); |
893 | ||
894 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CALLBACKS; | |
895 | ||
896 | #ifdef HAVE_GNUTLS_CALLBACK_CERTIFICATE_VERIFY | |
897 | #else | |
898 | #endif | |
899 | ||
8ed70bf3 LMI |
900 | GNUTLS_LOG (1, max_log_level, "gnutls_init"); |
901 | ||
0898ca10 | 902 | ret = fn_gnutls_init (&state, GNUTLS_CLIENT); |
8af55556 TZ |
903 | |
904 | if (ret < GNUTLS_E_SUCCESS) | |
e6059fa2 | 905 | return gnutls_make_error (ret); |
8af55556 TZ |
906 | |
907 | XPROCESS (proc)->gnutls_state = state; | |
908 | ||
909 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT; | |
910 | ||
c1ae068b LMI |
911 | if (STRINGP (priority_string)) |
912 | { | |
51b59d79 | 913 | priority_string_ptr = SSDATA (priority_string); |
c1ae068b LMI |
914 | GNUTLS_LOG2 (1, max_log_level, "got non-default priority string:", |
915 | priority_string_ptr); | |
916 | } | |
917 | else | |
918 | { | |
919 | GNUTLS_LOG2 (1, max_log_level, "using default priority string:", | |
920 | priority_string_ptr); | |
921 | } | |
51b59d79 | 922 | |
8ed70bf3 LMI |
923 | GNUTLS_LOG (1, max_log_level, "setting the priority string"); |
924 | ||
0898ca10 JB |
925 | ret = fn_gnutls_priority_set_direct (state, |
926 | priority_string_ptr, | |
927 | NULL); | |
8af55556 TZ |
928 | |
929 | if (ret < GNUTLS_E_SUCCESS) | |
e6059fa2 | 930 | return gnutls_make_error (ret); |
8af55556 TZ |
931 | |
932 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_PRIORITY; | |
933 | ||
8af55556 | 934 | if (EQ (type, Qgnutls_x509pki)) |
e6059fa2 | 935 | { |
0898ca10 | 936 | ret = fn_gnutls_credentials_set (state, GNUTLS_CRD_CERTIFICATE, x509_cred); |
e6059fa2 | 937 | } |
8af55556 | 938 | else if (EQ (type, Qgnutls_anon)) |
e6059fa2 | 939 | { |
0898ca10 | 940 | ret = fn_gnutls_credentials_set (state, GNUTLS_CRD_ANON, anon_cred); |
e6059fa2 | 941 | } |
8af55556 | 942 | else |
e6059fa2 | 943 | { |
8af55556 TZ |
944 | error ("unknown credential type"); |
945 | ret = GNUTLS_EMACS_ERROR_INVALID_TYPE; | |
e6059fa2 | 946 | } |
8af55556 TZ |
947 | |
948 | if (ret < GNUTLS_E_SUCCESS) | |
e6059fa2 | 949 | return gnutls_make_error (ret); |
8af55556 | 950 | |
8ed70bf3 LMI |
951 | XPROCESS (proc)->gnutls_anon_cred = anon_cred; |
952 | XPROCESS (proc)->gnutls_x509_cred = x509_cred; | |
8af55556 TZ |
953 | XPROCESS (proc)->gnutls_cred_type = type; |
954 | ||
955 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_SET; | |
956 | ||
e061a11b | 957 | ret = emacs_gnutls_handshake (XPROCESS (proc)); |
bac5cef8 | 958 | |
e061a11b TZ |
959 | if (ret < GNUTLS_E_SUCCESS) |
960 | return gnutls_make_error (ret); | |
961 | ||
962 | /* Now verify the peer, following | |
963 | http://www.gnu.org/software/gnutls/manual/html_node/Verifying-peer_0027s-certificate.html. | |
964 | The peer should present at least one certificate in the chain; do a | |
965 | check of the certificate's hostname with | |
966 | gnutls_x509_crt_check_hostname() against :hostname. */ | |
967 | ||
0898ca10 | 968 | ret = fn_gnutls_certificate_verify_peers2 (state, &peer_verification); |
e061a11b TZ |
969 | |
970 | if (ret < GNUTLS_E_SUCCESS) | |
971 | return gnutls_make_error (ret); | |
671875da | 972 | |
e061a11b | 973 | if (XINT (loglevel) > 0 && peer_verification & GNUTLS_CERT_INVALID) |
671875da | 974 | message ("%s certificate could not be verified.", |
e061a11b | 975 | c_hostname); |
671875da | 976 | |
e061a11b TZ |
977 | if (peer_verification & GNUTLS_CERT_REVOKED) |
978 | GNUTLS_LOG2 (1, max_log_level, "certificate was revoked (CRL):", | |
979 | c_hostname); | |
671875da | 980 | |
e061a11b TZ |
981 | if (peer_verification & GNUTLS_CERT_SIGNER_NOT_FOUND) |
982 | GNUTLS_LOG2 (1, max_log_level, "certificate signer was not found:", | |
983 | c_hostname); | |
671875da | 984 | |
e061a11b TZ |
985 | if (peer_verification & GNUTLS_CERT_SIGNER_NOT_CA) |
986 | GNUTLS_LOG2 (1, max_log_level, "certificate signer is not a CA:", | |
987 | c_hostname); | |
988 | ||
989 | if (peer_verification & GNUTLS_CERT_INSECURE_ALGORITHM) | |
990 | GNUTLS_LOG2 (1, max_log_level, | |
991 | "certificate was signed with an insecure algorithm:", | |
992 | c_hostname); | |
993 | ||
994 | if (peer_verification & GNUTLS_CERT_NOT_ACTIVATED) | |
995 | GNUTLS_LOG2 (1, max_log_level, "certificate is not yet activated:", | |
996 | c_hostname); | |
997 | ||
998 | if (peer_verification & GNUTLS_CERT_EXPIRED) | |
999 | GNUTLS_LOG2 (1, max_log_level, "certificate has expired:", | |
1000 | c_hostname); | |
1001 | ||
1002 | if (peer_verification != 0) | |
1003 | { | |
1004 | if (NILP (verify_hostname_error)) | |
1005 | { | |
1006 | GNUTLS_LOG2 (1, max_log_level, "certificate validation failed:", | |
1007 | c_hostname); | |
1008 | } | |
1009 | else | |
1010 | { | |
1011 | error ("Certificate validation failed %s, verification code %d", | |
1012 | c_hostname, peer_verification); | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | /* Up to here the process is the same for X.509 certificates and | |
1017 | OpenPGP keys. From now on X.509 certificates are assumed. This | |
1018 | can be easily extended to work with openpgp keys as well. */ | |
0898ca10 | 1019 | if (fn_gnutls_certificate_type_get (state) == GNUTLS_CRT_X509) |
e061a11b | 1020 | { |
0898ca10 | 1021 | ret = fn_gnutls_x509_crt_init (&gnutls_verify_cert); |
e061a11b TZ |
1022 | |
1023 | if (ret < GNUTLS_E_SUCCESS) | |
1024 | return gnutls_make_error (ret); | |
1025 | ||
671875da | 1026 | gnutls_verify_cert_list = |
0898ca10 | 1027 | fn_gnutls_certificate_get_peers (state, &gnutls_verify_cert_list_size); |
e061a11b TZ |
1028 | |
1029 | if (NULL == gnutls_verify_cert_list) | |
1030 | { | |
1031 | error ("No x509 certificate was found!\n"); | |
1032 | } | |
1033 | ||
1034 | /* We only check the first certificate in the given chain. */ | |
0898ca10 JB |
1035 | ret = fn_gnutls_x509_crt_import (gnutls_verify_cert, |
1036 | &gnutls_verify_cert_list[0], | |
1037 | GNUTLS_X509_FMT_DER); | |
e061a11b TZ |
1038 | |
1039 | if (ret < GNUTLS_E_SUCCESS) | |
1040 | { | |
0898ca10 | 1041 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); |
e061a11b TZ |
1042 | return gnutls_make_error (ret); |
1043 | } | |
1044 | ||
0898ca10 | 1045 | if (!fn_gnutls_x509_crt_check_hostname (gnutls_verify_cert, c_hostname)) |
e061a11b TZ |
1046 | { |
1047 | if (NILP (verify_hostname_error)) | |
1048 | { | |
1049 | GNUTLS_LOG2 (1, max_log_level, "x509 certificate does not match:", | |
1050 | c_hostname); | |
1051 | } | |
1052 | else | |
1053 | { | |
0898ca10 | 1054 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); |
e061a11b TZ |
1055 | error ("The x509 certificate does not match \"%s\"", |
1056 | c_hostname); | |
1057 | } | |
1058 | } | |
1059 | ||
0898ca10 | 1060 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); |
e061a11b TZ |
1061 | } |
1062 | ||
1063 | return gnutls_make_error (ret); | |
8af55556 TZ |
1064 | } |
1065 | ||
1066 | DEFUN ("gnutls-bye", Fgnutls_bye, | |
1067 | Sgnutls_bye, 2, 2, 0, | |
74f1829d | 1068 | doc: /* Terminate current GnuTLS connection for process PROC. |
8af55556 TZ |
1069 | The connection should have been initiated using `gnutls-handshake'. |
1070 | ||
1071 | If CONT is not nil the TLS connection gets terminated and further | |
74f1829d | 1072 | receives and sends will be disallowed. If the return value is zero you |
8af55556 TZ |
1073 | may continue using the connection. If CONT is nil, GnuTLS actually |
1074 | sends an alert containing a close request and waits for the peer to | |
1075 | reply with the same message. In order to reuse the connection you | |
1076 | should wait for an EOF from the peer. | |
1077 | ||
1078 | This function may also return `gnutls-e-again', or | |
1079 | `gnutls-e-interrupted'. */) | |
1080 | (Lisp_Object proc, Lisp_Object cont) | |
1081 | { | |
1082 | gnutls_session_t state; | |
1083 | int ret; | |
1084 | ||
1085 | CHECK_PROCESS (proc); | |
1086 | ||
1087 | state = XPROCESS (proc)->gnutls_state; | |
1088 | ||
0898ca10 JB |
1089 | ret = fn_gnutls_bye (state, |
1090 | NILP (cont) ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR); | |
8af55556 TZ |
1091 | |
1092 | return gnutls_make_error (ret); | |
1093 | } | |
1094 | ||
8af55556 TZ |
1095 | void |
1096 | syms_of_gnutls (void) | |
1097 | { | |
e061a11b TZ |
1098 | gnutls_global_initialized = 0; |
1099 | ||
0898ca10 JB |
1100 | Qgnutls_dll = intern_c_string ("gnutls"); |
1101 | staticpro (&Qgnutls_dll); | |
1102 | ||
e061a11b TZ |
1103 | Qgnutls_log_level = intern_c_string ("gnutls-log-level"); |
1104 | staticpro (&Qgnutls_log_level); | |
8af55556 TZ |
1105 | |
1106 | Qgnutls_code = intern_c_string ("gnutls-code"); | |
1107 | staticpro (&Qgnutls_code); | |
1108 | ||
1109 | Qgnutls_anon = intern_c_string ("gnutls-anon"); | |
1110 | staticpro (&Qgnutls_anon); | |
1111 | ||
1112 | Qgnutls_x509pki = intern_c_string ("gnutls-x509pki"); | |
1113 | staticpro (&Qgnutls_x509pki); | |
1114 | ||
e061a11b TZ |
1115 | Qgnutls_bootprop_hostname = intern_c_string (":hostname"); |
1116 | staticpro (&Qgnutls_bootprop_hostname); | |
1117 | ||
b845653d | 1118 | Qgnutls_bootprop_priority = intern_c_string (":priority"); |
c1ae068b LMI |
1119 | staticpro (&Qgnutls_bootprop_priority); |
1120 | ||
b845653d | 1121 | Qgnutls_bootprop_trustfiles = intern_c_string (":trustfiles"); |
c1ae068b LMI |
1122 | staticpro (&Qgnutls_bootprop_trustfiles); |
1123 | ||
ff4de4aa TZ |
1124 | Qgnutls_bootprop_keylist = intern_c_string (":keylist"); |
1125 | staticpro (&Qgnutls_bootprop_keylist); | |
1126 | ||
1127 | Qgnutls_bootprop_crlfiles = intern_c_string (":crlfiles"); | |
1128 | staticpro (&Qgnutls_bootprop_crlfiles); | |
c1ae068b | 1129 | |
b845653d | 1130 | Qgnutls_bootprop_callbacks = intern_c_string (":callbacks"); |
c1ae068b LMI |
1131 | staticpro (&Qgnutls_bootprop_callbacks); |
1132 | ||
e061a11b TZ |
1133 | Qgnutls_bootprop_callbacks_verify = intern_c_string ("verify"); |
1134 | staticpro (&Qgnutls_bootprop_callbacks_verify); | |
1135 | ||
b845653d | 1136 | Qgnutls_bootprop_loglevel = intern_c_string (":loglevel"); |
c1ae068b LMI |
1137 | staticpro (&Qgnutls_bootprop_loglevel); |
1138 | ||
e061a11b TZ |
1139 | Qgnutls_bootprop_verify_flags = intern_c_string (":verify-flags"); |
1140 | staticpro (&Qgnutls_bootprop_verify_flags); | |
1141 | ||
1142 | Qgnutls_bootprop_verify_hostname_error = intern_c_string (":verify-error"); | |
1143 | staticpro (&Qgnutls_bootprop_verify_error); | |
1144 | ||
1145 | Qgnutls_bootprop_verify_hostname_error = intern_c_string (":verify-hostname-error"); | |
1146 | staticpro (&Qgnutls_bootprop_verify_hostname_error); | |
1147 | ||
8af55556 TZ |
1148 | Qgnutls_e_interrupted = intern_c_string ("gnutls-e-interrupted"); |
1149 | staticpro (&Qgnutls_e_interrupted); | |
1150 | Fput (Qgnutls_e_interrupted, Qgnutls_code, | |
1151 | make_number (GNUTLS_E_INTERRUPTED)); | |
1152 | ||
1153 | Qgnutls_e_again = intern_c_string ("gnutls-e-again"); | |
1154 | staticpro (&Qgnutls_e_again); | |
1155 | Fput (Qgnutls_e_again, Qgnutls_code, | |
1156 | make_number (GNUTLS_E_AGAIN)); | |
1157 | ||
1158 | Qgnutls_e_invalid_session = intern_c_string ("gnutls-e-invalid-session"); | |
1159 | staticpro (&Qgnutls_e_invalid_session); | |
1160 | Fput (Qgnutls_e_invalid_session, Qgnutls_code, | |
1161 | make_number (GNUTLS_E_INVALID_SESSION)); | |
1162 | ||
1163 | Qgnutls_e_not_ready_for_handshake = | |
1164 | intern_c_string ("gnutls-e-not-ready-for-handshake"); | |
1165 | staticpro (&Qgnutls_e_not_ready_for_handshake); | |
1166 | Fput (Qgnutls_e_not_ready_for_handshake, Qgnutls_code, | |
1167 | make_number (GNUTLS_E_APPLICATION_ERROR_MIN)); | |
1168 | ||
1169 | defsubr (&Sgnutls_get_initstage); | |
1170 | defsubr (&Sgnutls_errorp); | |
1171 | defsubr (&Sgnutls_error_fatalp); | |
1172 | defsubr (&Sgnutls_error_string); | |
1173 | defsubr (&Sgnutls_boot); | |
1174 | defsubr (&Sgnutls_deinit); | |
8af55556 | 1175 | defsubr (&Sgnutls_bye); |
0898ca10 | 1176 | defsubr (&Sgnutls_available_p); |
8af55556 | 1177 | } |
bafcf6a5 JB |
1178 | |
1179 | #endif /* HAVE_GNUTLS */ |