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8af55556 | 1 | /* GnuTLS glue for GNU Emacs. |
acaf905b | 2 | Copyright (C) 2010-2012 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_code; |
39 | static Lisp_Object Qgnutls_anon, Qgnutls_x509pki; | |
40 | static Lisp_Object Qgnutls_e_interrupted, Qgnutls_e_again, | |
8af55556 | 41 | Qgnutls_e_invalid_session, Qgnutls_e_not_ready_for_handshake; |
bafcf6a5 | 42 | static int gnutls_global_initialized; |
8af55556 | 43 | |
c1ae068b | 44 | /* The following are for the property list of `gnutls-boot'. */ |
a3720aa2 AS |
45 | static Lisp_Object QCgnutls_bootprop_priority; |
46 | static Lisp_Object QCgnutls_bootprop_trustfiles; | |
47 | static Lisp_Object QCgnutls_bootprop_keylist; | |
48 | static Lisp_Object QCgnutls_bootprop_crlfiles; | |
49 | static Lisp_Object QCgnutls_bootprop_callbacks; | |
50 | static Lisp_Object QCgnutls_bootprop_loglevel; | |
51 | static Lisp_Object QCgnutls_bootprop_hostname; | |
52 | static Lisp_Object QCgnutls_bootprop_min_prime_bits; | |
53 | static Lisp_Object QCgnutls_bootprop_verify_flags; | |
54 | static Lisp_Object QCgnutls_bootprop_verify_hostname_error; | |
e061a11b TZ |
55 | |
56 | /* Callback keys for `gnutls-boot'. Unused currently. */ | |
a3720aa2 | 57 | static Lisp_Object QCgnutls_bootprop_callbacks_verify; |
c1ae068b | 58 | |
0898ca10 JB |
59 | static void gnutls_log_function (int, const char *); |
60 | static void gnutls_log_function2 (int, const char*, const char*); | |
61 | ||
62 | \f | |
63 | #ifdef WINDOWSNT | |
64 | ||
65 | /* Macro for defining functions that will be loaded from the GnuTLS DLL. */ | |
dbdb9a7c | 66 | #define DEF_GNUTLS_FN(rettype,func,args) static rettype (FAR CDECL *fn_##func)args |
0898ca10 JB |
67 | |
68 | /* Macro for loading GnuTLS functions from the library. */ | |
69 | #define LOAD_GNUTLS_FN(lib,func) { \ | |
70 | fn_##func = (void *) GetProcAddress (lib, #func); \ | |
71 | if (!fn_##func) return 0; \ | |
72 | } | |
73 | ||
74 | DEF_GNUTLS_FN (gnutls_alert_description_t, gnutls_alert_get, | |
b5f03016 | 75 | (gnutls_session_t)); |
0898ca10 | 76 | DEF_GNUTLS_FN (const char *, gnutls_alert_get_name, |
b5f03016 | 77 | (gnutls_alert_description_t)); |
0898ca10 JB |
78 | DEF_GNUTLS_FN (int, gnutls_alert_send_appropriate, (gnutls_session_t, int)); |
79 | DEF_GNUTLS_FN (int, gnutls_anon_allocate_client_credentials, | |
b5f03016 | 80 | (gnutls_anon_client_credentials_t *)); |
0898ca10 | 81 | DEF_GNUTLS_FN (void, gnutls_anon_free_client_credentials, |
b5f03016 | 82 | (gnutls_anon_client_credentials_t)); |
0898ca10 JB |
83 | DEF_GNUTLS_FN (int, gnutls_bye, (gnutls_session_t, gnutls_close_request_t)); |
84 | DEF_GNUTLS_FN (int, gnutls_certificate_allocate_credentials, | |
b5f03016 | 85 | (gnutls_certificate_credentials_t *)); |
0898ca10 | 86 | DEF_GNUTLS_FN (void, gnutls_certificate_free_credentials, |
b5f03016 | 87 | (gnutls_certificate_credentials_t)); |
0898ca10 | 88 | DEF_GNUTLS_FN (const gnutls_datum_t *, gnutls_certificate_get_peers, |
b5f03016 | 89 | (gnutls_session_t, unsigned int *)); |
0898ca10 | 90 | DEF_GNUTLS_FN (void, gnutls_certificate_set_verify_flags, |
b5f03016 | 91 | (gnutls_certificate_credentials_t, unsigned int)); |
0898ca10 | 92 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_crl_file, |
b5f03016 AS |
93 | (gnutls_certificate_credentials_t, const char *, |
94 | gnutls_x509_crt_fmt_t)); | |
0898ca10 | 95 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_key_file, |
b5f03016 AS |
96 | (gnutls_certificate_credentials_t, const char *, const char *, |
97 | gnutls_x509_crt_fmt_t)); | |
0898ca10 | 98 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_trust_file, |
b5f03016 AS |
99 | (gnutls_certificate_credentials_t, const char *, |
100 | gnutls_x509_crt_fmt_t)); | |
0898ca10 | 101 | DEF_GNUTLS_FN (gnutls_certificate_type_t, gnutls_certificate_type_get, |
b5f03016 | 102 | (gnutls_session_t)); |
0898ca10 | 103 | DEF_GNUTLS_FN (int, gnutls_certificate_verify_peers2, |
b5f03016 | 104 | (gnutls_session_t, unsigned int *)); |
0898ca10 | 105 | DEF_GNUTLS_FN (int, gnutls_credentials_set, |
b5f03016 | 106 | (gnutls_session_t, gnutls_credentials_type_t, void *)); |
0898ca10 | 107 | DEF_GNUTLS_FN (void, gnutls_deinit, (gnutls_session_t)); |
87e86684 | 108 | DEF_GNUTLS_FN (void, gnutls_dh_set_prime_bits, |
b5f03016 | 109 | (gnutls_session_t, unsigned int)); |
0898ca10 JB |
110 | DEF_GNUTLS_FN (int, gnutls_error_is_fatal, (int)); |
111 | DEF_GNUTLS_FN (int, gnutls_global_init, (void)); | |
112 | DEF_GNUTLS_FN (void, gnutls_global_set_log_function, (gnutls_log_func)); | |
113 | DEF_GNUTLS_FN (void, gnutls_global_set_log_level, (int)); | |
9cf9f756 PE |
114 | DEF_GNUTLS_FN (void, gnutls_global_set_mem_functions, |
115 | (gnutls_alloc_function, gnutls_alloc_function, | |
116 | gnutls_is_secure_function, gnutls_realloc_function, | |
117 | gnutls_free_function)); | |
0898ca10 JB |
118 | DEF_GNUTLS_FN (int, gnutls_handshake, (gnutls_session_t)); |
119 | DEF_GNUTLS_FN (int, gnutls_init, (gnutls_session_t *, gnutls_connection_end_t)); | |
120 | DEF_GNUTLS_FN (int, gnutls_priority_set_direct, | |
b5f03016 | 121 | (gnutls_session_t, const char *, const char **)); |
0898ca10 JB |
122 | DEF_GNUTLS_FN (size_t, gnutls_record_check_pending, (gnutls_session_t)); |
123 | DEF_GNUTLS_FN (ssize_t, gnutls_record_recv, (gnutls_session_t, void *, size_t)); | |
124 | DEF_GNUTLS_FN (ssize_t, gnutls_record_send, | |
b5f03016 | 125 | (gnutls_session_t, const void *, size_t)); |
0898ca10 JB |
126 | DEF_GNUTLS_FN (const char *, gnutls_strerror, (int)); |
127 | DEF_GNUTLS_FN (void, gnutls_transport_set_errno, (gnutls_session_t, int)); | |
651e947e | 128 | DEF_GNUTLS_FN (const char *, gnutls_check_version, (const char *)); |
0898ca10 JB |
129 | DEF_GNUTLS_FN (void, gnutls_transport_set_lowat, (gnutls_session_t, int)); |
130 | DEF_GNUTLS_FN (void, gnutls_transport_set_ptr2, | |
b5f03016 AS |
131 | (gnutls_session_t, gnutls_transport_ptr_t, |
132 | gnutls_transport_ptr_t)); | |
0898ca10 | 133 | DEF_GNUTLS_FN (void, gnutls_transport_set_pull_function, |
b5f03016 | 134 | (gnutls_session_t, gnutls_pull_func)); |
0898ca10 | 135 | DEF_GNUTLS_FN (void, gnutls_transport_set_push_function, |
b5f03016 | 136 | (gnutls_session_t, gnutls_push_func)); |
0898ca10 | 137 | DEF_GNUTLS_FN (int, gnutls_x509_crt_check_hostname, |
b5f03016 | 138 | (gnutls_x509_crt_t, const char *)); |
0898ca10 JB |
139 | DEF_GNUTLS_FN (void, gnutls_x509_crt_deinit, (gnutls_x509_crt_t)); |
140 | DEF_GNUTLS_FN (int, gnutls_x509_crt_import, | |
b5f03016 AS |
141 | (gnutls_x509_crt_t, const gnutls_datum_t *, |
142 | gnutls_x509_crt_fmt_t)); | |
0898ca10 JB |
143 | DEF_GNUTLS_FN (int, gnutls_x509_crt_init, (gnutls_x509_crt_t *)); |
144 | ||
145 | static int | |
146 | init_gnutls_functions (Lisp_Object libraries) | |
147 | { | |
148 | HMODULE library; | |
ac389d0c | 149 | int max_log_level = 1; |
0898ca10 JB |
150 | |
151 | if (!(library = w32_delayed_load (libraries, Qgnutls_dll))) | |
152 | { | |
ac389d0c | 153 | GNUTLS_LOG (1, max_log_level, "GnuTLS library not found"); |
0898ca10 JB |
154 | return 0; |
155 | } | |
156 | ||
157 | LOAD_GNUTLS_FN (library, gnutls_alert_get); | |
158 | LOAD_GNUTLS_FN (library, gnutls_alert_get_name); | |
159 | LOAD_GNUTLS_FN (library, gnutls_alert_send_appropriate); | |
160 | LOAD_GNUTLS_FN (library, gnutls_anon_allocate_client_credentials); | |
161 | LOAD_GNUTLS_FN (library, gnutls_anon_free_client_credentials); | |
162 | LOAD_GNUTLS_FN (library, gnutls_bye); | |
163 | LOAD_GNUTLS_FN (library, gnutls_certificate_allocate_credentials); | |
164 | LOAD_GNUTLS_FN (library, gnutls_certificate_free_credentials); | |
165 | LOAD_GNUTLS_FN (library, gnutls_certificate_get_peers); | |
166 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_verify_flags); | |
167 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_crl_file); | |
168 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_key_file); | |
169 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_trust_file); | |
170 | LOAD_GNUTLS_FN (library, gnutls_certificate_type_get); | |
171 | LOAD_GNUTLS_FN (library, gnutls_certificate_verify_peers2); | |
172 | LOAD_GNUTLS_FN (library, gnutls_credentials_set); | |
173 | LOAD_GNUTLS_FN (library, gnutls_deinit); | |
87e86684 | 174 | LOAD_GNUTLS_FN (library, gnutls_dh_set_prime_bits); |
0898ca10 JB |
175 | LOAD_GNUTLS_FN (library, gnutls_error_is_fatal); |
176 | LOAD_GNUTLS_FN (library, gnutls_global_init); | |
177 | LOAD_GNUTLS_FN (library, gnutls_global_set_log_function); | |
178 | LOAD_GNUTLS_FN (library, gnutls_global_set_log_level); | |
9cf9f756 | 179 | LOAD_GNUTLS_FN (library, gnutls_global_set_mem_functions); |
0898ca10 JB |
180 | LOAD_GNUTLS_FN (library, gnutls_handshake); |
181 | LOAD_GNUTLS_FN (library, gnutls_init); | |
182 | LOAD_GNUTLS_FN (library, gnutls_priority_set_direct); | |
183 | LOAD_GNUTLS_FN (library, gnutls_record_check_pending); | |
184 | LOAD_GNUTLS_FN (library, gnutls_record_recv); | |
185 | LOAD_GNUTLS_FN (library, gnutls_record_send); | |
186 | LOAD_GNUTLS_FN (library, gnutls_strerror); | |
187 | LOAD_GNUTLS_FN (library, gnutls_transport_set_errno); | |
651e947e EZ |
188 | LOAD_GNUTLS_FN (library, gnutls_check_version); |
189 | /* We don't need to call gnutls_transport_set_lowat in GnuTLS 2.11.1 | |
190 | and later, and the function was removed entirely in 3.0.0. */ | |
191 | if (!fn_gnutls_check_version ("2.11.1")) | |
192 | LOAD_GNUTLS_FN (library, gnutls_transport_set_lowat); | |
0898ca10 JB |
193 | LOAD_GNUTLS_FN (library, gnutls_transport_set_ptr2); |
194 | LOAD_GNUTLS_FN (library, gnutls_transport_set_pull_function); | |
195 | LOAD_GNUTLS_FN (library, gnutls_transport_set_push_function); | |
196 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_check_hostname); | |
197 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_deinit); | |
198 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_import); | |
199 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_init); | |
200 | ||
925a6be7 | 201 | max_log_level = global_gnutls_log_level; |
ac389d0c JB |
202 | |
203 | GNUTLS_LOG2 (1, max_log_level, "GnuTLS library loaded:", | |
b5f03016 | 204 | SDATA (Fget (Qgnutls_dll, QCloaded_from))); |
0898ca10 JB |
205 | return 1; |
206 | } | |
207 | ||
208 | #else /* !WINDOWSNT */ | |
209 | ||
210 | #define fn_gnutls_alert_get gnutls_alert_get | |
211 | #define fn_gnutls_alert_get_name gnutls_alert_get_name | |
212 | #define fn_gnutls_alert_send_appropriate gnutls_alert_send_appropriate | |
213 | #define fn_gnutls_anon_allocate_client_credentials gnutls_anon_allocate_client_credentials | |
214 | #define fn_gnutls_anon_free_client_credentials gnutls_anon_free_client_credentials | |
215 | #define fn_gnutls_bye gnutls_bye | |
216 | #define fn_gnutls_certificate_allocate_credentials gnutls_certificate_allocate_credentials | |
217 | #define fn_gnutls_certificate_free_credentials gnutls_certificate_free_credentials | |
218 | #define fn_gnutls_certificate_get_peers gnutls_certificate_get_peers | |
219 | #define fn_gnutls_certificate_set_verify_flags gnutls_certificate_set_verify_flags | |
220 | #define fn_gnutls_certificate_set_x509_crl_file gnutls_certificate_set_x509_crl_file | |
639c109b | 221 | #define fn_gnutls_certificate_set_x509_key_file gnutls_certificate_set_x509_key_file |
520cf78a | 222 | #define fn_gnutls_certificate_set_x509_trust_file gnutls_certificate_set_x509_trust_file |
0898ca10 JB |
223 | #define fn_gnutls_certificate_type_get gnutls_certificate_type_get |
224 | #define fn_gnutls_certificate_verify_peers2 gnutls_certificate_verify_peers2 | |
225 | #define fn_gnutls_credentials_set gnutls_credentials_set | |
226 | #define fn_gnutls_deinit gnutls_deinit | |
87e86684 | 227 | #define fn_gnutls_dh_set_prime_bits gnutls_dh_set_prime_bits |
0898ca10 JB |
228 | #define fn_gnutls_error_is_fatal gnutls_error_is_fatal |
229 | #define fn_gnutls_global_init gnutls_global_init | |
230 | #define fn_gnutls_global_set_log_function gnutls_global_set_log_function | |
231 | #define fn_gnutls_global_set_log_level gnutls_global_set_log_level | |
9cf9f756 | 232 | #define fn_gnutls_global_set_mem_functions gnutls_global_set_mem_functions |
0898ca10 JB |
233 | #define fn_gnutls_handshake gnutls_handshake |
234 | #define fn_gnutls_init gnutls_init | |
235 | #define fn_gnutls_priority_set_direct gnutls_priority_set_direct | |
236 | #define fn_gnutls_record_check_pending gnutls_record_check_pending | |
237 | #define fn_gnutls_record_recv gnutls_record_recv | |
238 | #define fn_gnutls_record_send gnutls_record_send | |
239 | #define fn_gnutls_strerror gnutls_strerror | |
240 | #define fn_gnutls_transport_set_errno gnutls_transport_set_errno | |
0898ca10 | 241 | #define fn_gnutls_transport_set_ptr2 gnutls_transport_set_ptr2 |
0898ca10 JB |
242 | #define fn_gnutls_x509_crt_check_hostname gnutls_x509_crt_check_hostname |
243 | #define fn_gnutls_x509_crt_deinit gnutls_x509_crt_deinit | |
244 | #define fn_gnutls_x509_crt_import gnutls_x509_crt_import | |
245 | #define fn_gnutls_x509_crt_init gnutls_x509_crt_init | |
246 | ||
247 | #endif /* !WINDOWSNT */ | |
248 | ||
249 | \f | |
74f1829d | 250 | static void |
e061a11b TZ |
251 | gnutls_log_function (int level, const char* string) |
252 | { | |
253 | message ("gnutls.c: [%d] %s", level, string); | |
254 | } | |
255 | ||
256 | static void | |
257 | gnutls_log_function2 (int level, const char* string, const char* extra) | |
258 | { | |
259 | message ("gnutls.c: [%d] %s %s", level, string, extra); | |
260 | } | |
261 | ||
262 | static int | |
bac5cef8 LMI |
263 | emacs_gnutls_handshake (struct Lisp_Process *proc) |
264 | { | |
265 | gnutls_session_t state = proc->gnutls_state; | |
266 | int ret; | |
267 | ||
268 | if (proc->gnutls_initstage < GNUTLS_STAGE_HANDSHAKE_CANDO) | |
6a7a1b0b | 269 | return -1; |
bac5cef8 LMI |
270 | |
271 | if (proc->gnutls_initstage < GNUTLS_STAGE_TRANSPORT_POINTERS_SET) | |
e6059fa2 | 272 | { |
e061a11b TZ |
273 | #ifdef WINDOWSNT |
274 | /* On W32 we cannot transfer socket handles between different runtime | |
b5f03016 AS |
275 | libraries, so we tell GnuTLS to use our special push/pull |
276 | functions. */ | |
0898ca10 | 277 | fn_gnutls_transport_set_ptr2 (state, |
b5f03016 AS |
278 | (gnutls_transport_ptr_t) proc, |
279 | (gnutls_transport_ptr_t) proc); | |
0898ca10 JB |
280 | fn_gnutls_transport_set_push_function (state, &emacs_gnutls_push); |
281 | fn_gnutls_transport_set_pull_function (state, &emacs_gnutls_pull); | |
e061a11b TZ |
282 | |
283 | /* For non blocking sockets or other custom made pull/push | |
b5f03016 AS |
284 | functions the gnutls_transport_set_lowat must be called, with |
285 | a zero low water mark value. (GnuTLS 2.10.4 documentation) | |
e061a11b | 286 | |
b5f03016 AS |
287 | (Note: this is probably not strictly necessary as the lowat |
288 | value is only used when no custom pull/push functions are | |
289 | set.) */ | |
651e947e EZ |
290 | /* According to GnuTLS NEWS file, lowat level has been set to |
291 | zero by default in version 2.11.1, and the function | |
292 | gnutls_transport_set_lowat was removed from the library in | |
293 | version 2.99.0. */ | |
294 | if (!fn_gnutls_check_version ("2.11.1")) | |
295 | fn_gnutls_transport_set_lowat (state, 0); | |
e061a11b | 296 | #else |
c1ae068b | 297 | /* This is how GnuTLS takes sockets: as file descriptors passed |
b5f03016 AS |
298 | in. For an Emacs process socket, infd and outfd are the |
299 | same but we use this two-argument version for clarity. */ | |
0898ca10 | 300 | fn_gnutls_transport_set_ptr2 (state, |
b5f03016 AS |
301 | (gnutls_transport_ptr_t) (long) proc->infd, |
302 | (gnutls_transport_ptr_t) (long) proc->outfd); | |
e061a11b | 303 | #endif |
bac5cef8 | 304 | |
e6059fa2 LMI |
305 | proc->gnutls_initstage = GNUTLS_STAGE_TRANSPORT_POINTERS_SET; |
306 | } | |
bac5cef8 | 307 | |
e061a11b TZ |
308 | do |
309 | { | |
0898ca10 | 310 | ret = fn_gnutls_handshake (state); |
e061a11b TZ |
311 | emacs_gnutls_handle_error (state, ret); |
312 | } | |
0898ca10 | 313 | while (ret < 0 && fn_gnutls_error_is_fatal (ret) == 0); |
e061a11b | 314 | |
bac5cef8 LMI |
315 | proc->gnutls_initstage = GNUTLS_STAGE_HANDSHAKE_TRIED; |
316 | ||
317 | if (ret == GNUTLS_E_SUCCESS) | |
e6059fa2 | 318 | { |
e061a11b | 319 | /* Here we're finally done. */ |
e6059fa2 LMI |
320 | proc->gnutls_initstage = GNUTLS_STAGE_READY; |
321 | } | |
e061a11b TZ |
322 | else |
323 | { | |
0898ca10 | 324 | fn_gnutls_alert_send_appropriate (state, ret); |
e061a11b TZ |
325 | } |
326 | return ret; | |
bac5cef8 LMI |
327 | } |
328 | ||
0898ca10 JB |
329 | int |
330 | emacs_gnutls_record_check_pending (gnutls_session_t state) | |
331 | { | |
332 | return fn_gnutls_record_check_pending (state); | |
333 | } | |
334 | ||
335 | void | |
336 | emacs_gnutls_transport_set_errno (gnutls_session_t state, int err) | |
337 | { | |
338 | fn_gnutls_transport_set_errno (state, err); | |
339 | } | |
340 | ||
9587a89d | 341 | EMACS_INT |
e968f4f3 | 342 | emacs_gnutls_write (struct Lisp_Process *proc, const char *buf, EMACS_INT nbyte) |
8af55556 | 343 | { |
c8926152 | 344 | ssize_t rtnval = 0; |
9587a89d | 345 | EMACS_INT bytes_written; |
df7fcaff LMI |
346 | gnutls_session_t state = proc->gnutls_state; |
347 | ||
0ca43699 AS |
348 | if (proc->gnutls_initstage != GNUTLS_STAGE_READY) |
349 | { | |
355cdaf3 | 350 | #ifdef EWOULDBLOCK |
0ca43699 | 351 | errno = EWOULDBLOCK; |
355cdaf3 LMI |
352 | #endif |
353 | #ifdef EAGAIN | |
0ca43699 | 354 | errno = EAGAIN; |
355cdaf3 | 355 | #endif |
0ca43699 AS |
356 | return 0; |
357 | } | |
8af55556 TZ |
358 | |
359 | bytes_written = 0; | |
360 | ||
361 | while (nbyte > 0) | |
362 | { | |
0898ca10 | 363 | rtnval = fn_gnutls_record_send (state, buf, nbyte); |
8af55556 | 364 | |
2e6c74c5 | 365 | if (rtnval < 0) |
b5f03016 | 366 | { |
77abcbc2 | 367 | if (rtnval == GNUTLS_E_INTERRUPTED) |
b5f03016 | 368 | continue; |
0ca43699 AS |
369 | else |
370 | { | |
371 | /* If we get GNUTLS_E_AGAIN, then set errno | |
372 | appropriately so that send_process retries the | |
373 | correct way instead of erroring out. */ | |
374 | if (rtnval == GNUTLS_E_AGAIN) | |
375 | { | |
2e8f3c56 | 376 | #ifdef EWOULDBLOCK |
0ca43699 | 377 | errno = EWOULDBLOCK; |
2e8f3c56 LI |
378 | #endif |
379 | #ifdef EAGAIN | |
0ca43699 | 380 | errno = EAGAIN; |
2e8f3c56 | 381 | #endif |
0ca43699 AS |
382 | } |
383 | break; | |
2e8f3c56 | 384 | } |
b5f03016 | 385 | } |
8af55556 TZ |
386 | |
387 | buf += rtnval; | |
388 | nbyte -= rtnval; | |
389 | bytes_written += rtnval; | |
390 | } | |
8af55556 | 391 | |
e061a11b | 392 | emacs_gnutls_handle_error (state, rtnval); |
8af55556 TZ |
393 | return (bytes_written); |
394 | } | |
395 | ||
9587a89d | 396 | EMACS_INT |
e968f4f3 | 397 | emacs_gnutls_read (struct Lisp_Process *proc, char *buf, EMACS_INT nbyte) |
8af55556 | 398 | { |
368f4090 | 399 | ssize_t rtnval; |
df7fcaff LMI |
400 | gnutls_session_t state = proc->gnutls_state; |
401 | ||
e6059fa2 LMI |
402 | if (proc->gnutls_initstage != GNUTLS_STAGE_READY) |
403 | { | |
404 | emacs_gnutls_handshake (proc); | |
405 | return -1; | |
406 | } | |
0898ca10 | 407 | rtnval = fn_gnutls_record_recv (state, buf, nbyte); |
ec9f09be LMI |
408 | if (rtnval >= 0) |
409 | return rtnval; | |
dbf38e02 LMI |
410 | else if (rtnval == GNUTLS_E_UNEXPECTED_PACKET_LENGTH) |
411 | /* The peer closed the connection. */ | |
412 | return 0; | |
e061a11b TZ |
413 | else if (emacs_gnutls_handle_error (state, rtnval) == 0) |
414 | /* non-fatal error */ | |
415 | return -1; | |
4b2d9ec2 | 416 | else { |
9173deec | 417 | /* a fatal error occurred */ |
e061a11b | 418 | return 0; |
4b2d9ec2 | 419 | } |
8af55556 TZ |
420 | } |
421 | ||
e061a11b TZ |
422 | /* report a GnuTLS error to the user. |
423 | Returns zero if the error code was successfully handled. */ | |
424 | static int | |
425 | emacs_gnutls_handle_error (gnutls_session_t session, int err) | |
426 | { | |
e061a11b TZ |
427 | int max_log_level = 0; |
428 | ||
0c8c7e5c | 429 | int ret; |
e061a11b TZ |
430 | const char *str; |
431 | ||
432 | /* TODO: use a Lisp_Object generated by gnutls_make_error? */ | |
433 | if (err >= 0) | |
434 | return 0; | |
435 | ||
925a6be7 | 436 | max_log_level = global_gnutls_log_level; |
e061a11b TZ |
437 | |
438 | /* TODO: use gnutls-error-fatalp and gnutls-error-string. */ | |
439 | ||
0898ca10 | 440 | str = fn_gnutls_strerror (err); |
e061a11b TZ |
441 | if (!str) |
442 | str = "unknown"; | |
443 | ||
0898ca10 | 444 | if (fn_gnutls_error_is_fatal (err)) |
e061a11b TZ |
445 | { |
446 | ret = err; | |
447 | GNUTLS_LOG2 (0, max_log_level, "fatal error:", str); | |
448 | } | |
449 | else | |
450 | { | |
451 | ret = 0; | |
452 | GNUTLS_LOG2 (1, max_log_level, "non-fatal error:", str); | |
453 | /* TODO: EAGAIN AKA Qgnutls_e_again should be level 2. */ | |
454 | } | |
455 | ||
456 | if (err == GNUTLS_E_WARNING_ALERT_RECEIVED | |
457 | || err == GNUTLS_E_FATAL_ALERT_RECEIVED) | |
458 | { | |
0898ca10 | 459 | int alert = fn_gnutls_alert_get (session); |
e061a11b | 460 | int level = (err == GNUTLS_E_FATAL_ALERT_RECEIVED) ? 0 : 1; |
0898ca10 | 461 | str = fn_gnutls_alert_get_name (alert); |
e061a11b TZ |
462 | if (!str) |
463 | str = "unknown"; | |
464 | ||
465 | GNUTLS_LOG2 (level, max_log_level, "Received alert: ", str); | |
466 | } | |
467 | return ret; | |
468 | } | |
469 | ||
8af55556 TZ |
470 | /* convert an integer error to a Lisp_Object; it will be either a |
471 | known symbol like `gnutls_e_interrupted' and `gnutls_e_again' or | |
472 | simply the integer value of the error. GNUTLS_E_SUCCESS is mapped | |
473 | to Qt. */ | |
74f1829d | 474 | static Lisp_Object |
ec8df744 | 475 | gnutls_make_error (int err) |
8af55556 | 476 | { |
ec8df744 | 477 | switch (err) |
e6059fa2 LMI |
478 | { |
479 | case GNUTLS_E_SUCCESS: | |
480 | return Qt; | |
481 | case GNUTLS_E_AGAIN: | |
482 | return Qgnutls_e_again; | |
483 | case GNUTLS_E_INTERRUPTED: | |
484 | return Qgnutls_e_interrupted; | |
485 | case GNUTLS_E_INVALID_SESSION: | |
486 | return Qgnutls_e_invalid_session; | |
487 | } | |
8af55556 | 488 | |
ec8df744 | 489 | return make_number (err); |
8af55556 TZ |
490 | } |
491 | ||
9c6c6f49 CY |
492 | Lisp_Object |
493 | emacs_gnutls_deinit (Lisp_Object proc) | |
494 | { | |
495 | int log_level; | |
496 | ||
497 | CHECK_PROCESS (proc); | |
498 | ||
499 | if (XPROCESS (proc)->gnutls_p == 0) | |
500 | return Qnil; | |
501 | ||
502 | log_level = XPROCESS (proc)->gnutls_log_level; | |
503 | ||
504 | if (XPROCESS (proc)->gnutls_x509_cred) | |
505 | { | |
506 | GNUTLS_LOG (2, log_level, "Deallocating x509 credentials"); | |
507 | fn_gnutls_certificate_free_credentials (XPROCESS (proc)->gnutls_x509_cred); | |
508 | XPROCESS (proc)->gnutls_x509_cred = NULL; | |
509 | } | |
510 | ||
511 | if (XPROCESS (proc)->gnutls_anon_cred) | |
512 | { | |
513 | GNUTLS_LOG (2, log_level, "Deallocating anon credentials"); | |
514 | fn_gnutls_anon_free_client_credentials (XPROCESS (proc)->gnutls_anon_cred); | |
515 | XPROCESS (proc)->gnutls_anon_cred = NULL; | |
516 | } | |
517 | ||
435c1d67 | 518 | if (XPROCESS (proc)->gnutls_state) |
9c6c6f49 CY |
519 | { |
520 | fn_gnutls_deinit (XPROCESS (proc)->gnutls_state); | |
435c1d67 CY |
521 | XPROCESS (proc)->gnutls_state = NULL; |
522 | if (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_INIT) | |
523 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT - 1; | |
9c6c6f49 CY |
524 | } |
525 | ||
526 | XPROCESS (proc)->gnutls_p = 0; | |
527 | return Qt; | |
528 | } | |
529 | ||
8af55556 | 530 | DEFUN ("gnutls-get-initstage", Fgnutls_get_initstage, Sgnutls_get_initstage, 1, 1, 0, |
74f1829d | 531 | doc: /* Return the GnuTLS init stage of process PROC. |
8af55556 | 532 | See also `gnutls-boot'. */) |
74f1829d | 533 | (Lisp_Object proc) |
8af55556 TZ |
534 | { |
535 | CHECK_PROCESS (proc); | |
536 | ||
537 | return make_number (GNUTLS_INITSTAGE (proc)); | |
538 | } | |
539 | ||
540 | DEFUN ("gnutls-errorp", Fgnutls_errorp, Sgnutls_errorp, 1, 1, 0, | |
74f1829d JB |
541 | doc: /* Return t if ERROR indicates a GnuTLS problem. |
542 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
543 | usage: (gnutls-errorp ERROR) */) | |
544 | (Lisp_Object err) | |
8af55556 | 545 | { |
74f1829d | 546 | if (EQ (err, Qt)) return Qnil; |
8af55556 TZ |
547 | |
548 | return Qt; | |
549 | } | |
550 | ||
551 | DEFUN ("gnutls-error-fatalp", Fgnutls_error_fatalp, Sgnutls_error_fatalp, 1, 1, 0, | |
74f1829d JB |
552 | doc: /* Check if ERROR is fatal. |
553 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
554 | usage: (gnutls-error-fatalp ERROR) */) | |
555 | (Lisp_Object err) | |
8af55556 TZ |
556 | { |
557 | Lisp_Object code; | |
558 | ||
559 | if (EQ (err, Qt)) return Qnil; | |
560 | ||
561 | if (SYMBOLP (err)) | |
8af55556 | 562 | { |
e6059fa2 LMI |
563 | code = Fget (err, Qgnutls_code); |
564 | if (NUMBERP (code)) | |
565 | { | |
566 | err = code; | |
567 | } | |
568 | else | |
569 | { | |
570 | error ("Symbol has no numeric gnutls-code property"); | |
571 | } | |
8af55556 | 572 | } |
8af55556 TZ |
573 | |
574 | if (!NUMBERP (err)) | |
575 | error ("Not an error symbol or code"); | |
576 | ||
0898ca10 | 577 | if (0 == fn_gnutls_error_is_fatal (XINT (err))) |
8af55556 TZ |
578 | return Qnil; |
579 | ||
580 | return Qt; | |
581 | } | |
582 | ||
583 | DEFUN ("gnutls-error-string", Fgnutls_error_string, Sgnutls_error_string, 1, 1, 0, | |
74f1829d JB |
584 | doc: /* Return a description of ERROR. |
585 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
586 | usage: (gnutls-error-string ERROR) */) | |
587 | (Lisp_Object err) | |
8af55556 TZ |
588 | { |
589 | Lisp_Object code; | |
590 | ||
591 | if (EQ (err, Qt)) return build_string ("Not an error"); | |
592 | ||
593 | if (SYMBOLP (err)) | |
8af55556 | 594 | { |
e6059fa2 LMI |
595 | code = Fget (err, Qgnutls_code); |
596 | if (NUMBERP (code)) | |
597 | { | |
598 | err = code; | |
599 | } | |
600 | else | |
601 | { | |
602 | return build_string ("Symbol has no numeric gnutls-code property"); | |
603 | } | |
8af55556 | 604 | } |
8af55556 TZ |
605 | |
606 | if (!NUMBERP (err)) | |
607 | return build_string ("Not an error symbol or code"); | |
608 | ||
0898ca10 | 609 | return build_string (fn_gnutls_strerror (XINT (err))); |
8af55556 TZ |
610 | } |
611 | ||
612 | DEFUN ("gnutls-deinit", Fgnutls_deinit, Sgnutls_deinit, 1, 1, 0, | |
e1b69165 | 613 | doc: /* Deallocate GnuTLS resources associated with process PROC. |
8af55556 | 614 | See also `gnutls-init'. */) |
74f1829d | 615 | (Lisp_Object proc) |
8af55556 | 616 | { |
9c6c6f49 | 617 | return emacs_gnutls_deinit (proc); |
8af55556 TZ |
618 | } |
619 | ||
0898ca10 JB |
620 | DEFUN ("gnutls-available-p", Fgnutls_available_p, Sgnutls_available_p, 0, 0, 0, |
621 | doc: /* Return t if GnuTLS is available in this instance of Emacs. */) | |
622 | (void) | |
623 | { | |
624 | #ifdef WINDOWSNT | |
625 | Lisp_Object found = Fassq (Qgnutls_dll, Vlibrary_cache); | |
626 | if (CONSP (found)) | |
627 | return XCDR (found); | |
628 | else | |
629 | { | |
630 | Lisp_Object status; | |
631 | status = init_gnutls_functions (Vdynamic_library_alist) ? Qt : Qnil; | |
632 | Vlibrary_cache = Fcons (Fcons (Qgnutls_dll, status), Vlibrary_cache); | |
633 | return status; | |
634 | } | |
635 | #else | |
636 | return Qt; | |
637 | #endif | |
638 | } | |
639 | ||
640 | ||
e1b69165 JB |
641 | /* Initializes global GnuTLS state to defaults. |
642 | Call `gnutls-global-deinit' when GnuTLS usage is no longer needed. | |
8af55556 | 643 | Returns zero on success. */ |
74f1829d | 644 | static Lisp_Object |
e061a11b | 645 | emacs_gnutls_global_init (void) |
8af55556 TZ |
646 | { |
647 | int ret = GNUTLS_E_SUCCESS; | |
648 | ||
e061a11b | 649 | if (!gnutls_global_initialized) |
9cf9f756 PE |
650 | { |
651 | fn_gnutls_global_set_mem_functions (xmalloc, xmalloc, NULL, | |
652 | xrealloc, xfree); | |
653 | ret = fn_gnutls_global_init (); | |
654 | } | |
e061a11b | 655 | gnutls_global_initialized = 1; |
8af55556 TZ |
656 | |
657 | return gnutls_make_error (ret); | |
658 | } | |
659 | ||
ec8df744 | 660 | #if 0 |
e1b69165 | 661 | /* Deinitializes global GnuTLS state. |
8af55556 | 662 | See also `gnutls-global-init'. */ |
74f1829d | 663 | static Lisp_Object |
e061a11b | 664 | emacs_gnutls_global_deinit (void) |
8af55556 | 665 | { |
e061a11b | 666 | if (gnutls_global_initialized) |
8af55556 TZ |
667 | gnutls_global_deinit (); |
668 | ||
e061a11b | 669 | gnutls_global_initialized = 0; |
8af55556 TZ |
670 | |
671 | return gnutls_make_error (GNUTLS_E_SUCCESS); | |
672 | } | |
ec8df744 | 673 | #endif |
8af55556 | 674 | |
c1ae068b LMI |
675 | DEFUN ("gnutls-boot", Fgnutls_boot, Sgnutls_boot, 3, 3, 0, |
676 | doc: /* Initialize GnuTLS client for process PROC with TYPE+PROPLIST. | |
435c1d67 | 677 | Currently only client mode is supported. Return a success/failure |
8af55556 TZ |
678 | value you can check with `gnutls-errorp'. |
679 | ||
c1ae068b LMI |
680 | TYPE is a symbol, either `gnutls-anon' or `gnutls-x509pki'. |
681 | PROPLIST is a property list with the following keys: | |
682 | ||
e061a11b TZ |
683 | :hostname is a string naming the remote host. |
684 | ||
c1ae068b | 685 | :priority is a GnuTLS priority string, defaults to "NORMAL". |
e061a11b | 686 | |
c1ae068b | 687 | :trustfiles is a list of PEM-encoded trust files for `gnutls-x509pki'. |
e061a11b | 688 | |
ff4de4aa TZ |
689 | :crlfiles is a list of PEM-encoded CRL lists for `gnutls-x509pki'. |
690 | ||
691 | :keylist is an alist of PEM-encoded key files and PEM-encoded | |
692 | certificates for `gnutls-x509pki'. | |
e061a11b TZ |
693 | |
694 | :callbacks is an alist of callback functions, see below. | |
695 | ||
c1ae068b | 696 | :loglevel is the debug level requested from GnuTLS, try 4. |
8ed70bf3 | 697 | |
e061a11b TZ |
698 | :verify-flags is a bitset as per GnuTLS' |
699 | gnutls_certificate_set_verify_flags. | |
700 | ||
e061a11b TZ |
701 | :verify-hostname-error, if non-nil, makes a hostname mismatch an |
702 | error. Otherwise it will be just a warning. | |
703 | ||
87e86684 LM |
704 | :min-prime-bits is the minimum accepted number of bits the client will |
705 | accept in Diffie-Hellman key exchange. | |
706 | ||
c1ae068b LMI |
707 | The debug level will be set for this process AND globally for GnuTLS. |
708 | So if you set it higher or lower at any point, it affects global | |
709 | debugging. | |
8af55556 TZ |
710 | |
711 | Note that the priority is set on the client. The server does not use | |
712 | the protocols's priority except for disabling protocols that were not | |
713 | specified. | |
714 | ||
74f1829d | 715 | Processes must be initialized with this function before other GnuTLS |
8af55556 TZ |
716 | functions are used. This function allocates resources which can only |
717 | be deallocated by calling `gnutls-deinit' or by calling it again. | |
718 | ||
e061a11b TZ |
719 | The callbacks alist can have a `verify' key, associated with a |
720 | verification function (UNUSED). | |
721 | ||
8af55556 | 722 | Each authentication type may need additional information in order to |
c1ae068b LMI |
723 | work. For X.509 PKI (`gnutls-x509pki'), you probably need at least |
724 | one trustfile (usually a CA bundle). */) | |
725 | (Lisp_Object proc, Lisp_Object type, Lisp_Object proplist) | |
8af55556 TZ |
726 | { |
727 | int ret = GNUTLS_E_SUCCESS; | |
8ed70bf3 LMI |
728 | int max_log_level = 0; |
729 | ||
8af55556 | 730 | gnutls_session_t state; |
435c1d67 CY |
731 | gnutls_certificate_credentials_t x509_cred = NULL; |
732 | gnutls_anon_client_credentials_t anon_cred = NULL; | |
8af55556 | 733 | Lisp_Object global_init; |
ec8df744 | 734 | char const *priority_string_ptr = "NORMAL"; /* default priority string. */ |
7754e151 | 735 | unsigned int peer_verification; |
e061a11b | 736 | char* c_hostname; |
c1ae068b LMI |
737 | |
738 | /* Placeholders for the property list elements. */ | |
739 | Lisp_Object priority_string; | |
740 | Lisp_Object trustfiles; | |
ff4de4aa TZ |
741 | Lisp_Object crlfiles; |
742 | Lisp_Object keylist; | |
ec8df744 | 743 | /* Lisp_Object callbacks; */ |
c1ae068b | 744 | Lisp_Object loglevel; |
e061a11b | 745 | Lisp_Object hostname; |
8d4c3955 | 746 | /* Lisp_Object verify_error; */ |
e061a11b | 747 | Lisp_Object verify_hostname_error; |
87e86684 | 748 | Lisp_Object prime_bits; |
8af55556 TZ |
749 | |
750 | CHECK_PROCESS (proc); | |
751 | CHECK_SYMBOL (type); | |
c1ae068b LMI |
752 | CHECK_LIST (proplist); |
753 | ||
0898ca10 JB |
754 | if (NILP (Fgnutls_available_p ())) |
755 | { | |
756 | error ("GnuTLS not available"); | |
757 | return gnutls_make_error (GNUTLS_EMACS_ERROR_NOT_LOADED); | |
758 | } | |
759 | ||
435c1d67 CY |
760 | if (!EQ (type, Qgnutls_x509pki) && !EQ (type, Qgnutls_anon)) |
761 | { | |
762 | error ("Invalid GnuTLS credential type"); | |
763 | return gnutls_make_error (GNUTLS_EMACS_ERROR_INVALID_TYPE); | |
764 | } | |
765 | ||
a3720aa2 AS |
766 | hostname = Fplist_get (proplist, QCgnutls_bootprop_hostname); |
767 | priority_string = Fplist_get (proplist, QCgnutls_bootprop_priority); | |
768 | trustfiles = Fplist_get (proplist, QCgnutls_bootprop_trustfiles); | |
769 | keylist = Fplist_get (proplist, QCgnutls_bootprop_keylist); | |
770 | crlfiles = Fplist_get (proplist, QCgnutls_bootprop_crlfiles); | |
a3720aa2 | 771 | loglevel = Fplist_get (proplist, QCgnutls_bootprop_loglevel); |
a3720aa2 AS |
772 | verify_hostname_error = Fplist_get (proplist, QCgnutls_bootprop_verify_hostname_error); |
773 | prime_bits = Fplist_get (proplist, QCgnutls_bootprop_min_prime_bits); | |
e061a11b TZ |
774 | |
775 | if (!STRINGP (hostname)) | |
776 | error ("gnutls-boot: invalid :hostname parameter"); | |
e061a11b | 777 | c_hostname = SSDATA (hostname); |
8af55556 | 778 | |
8ed70bf3 LMI |
779 | if (NUMBERP (loglevel)) |
780 | { | |
0898ca10 JB |
781 | fn_gnutls_global_set_log_function (gnutls_log_function); |
782 | fn_gnutls_global_set_log_level (XINT (loglevel)); | |
8ed70bf3 LMI |
783 | max_log_level = XINT (loglevel); |
784 | XPROCESS (proc)->gnutls_log_level = max_log_level; | |
785 | } | |
df7fcaff | 786 | |
8af55556 | 787 | /* always initialize globals. */ |
e061a11b | 788 | global_init = emacs_gnutls_global_init (); |
8af55556 TZ |
789 | if (! NILP (Fgnutls_errorp (global_init))) |
790 | return global_init; | |
791 | ||
9c6c6f49 CY |
792 | /* Before allocating new credentials, deallocate any credentials |
793 | that PROC might already have. */ | |
794 | emacs_gnutls_deinit (proc); | |
8af55556 | 795 | |
9c6c6f49 CY |
796 | /* Mark PROC as a GnuTLS process. */ |
797 | XPROCESS (proc)->gnutls_p = 1; | |
435c1d67 | 798 | XPROCESS (proc)->gnutls_state = NULL; |
9c6c6f49 CY |
799 | XPROCESS (proc)->gnutls_x509_cred = NULL; |
800 | XPROCESS (proc)->gnutls_anon_cred = NULL; | |
435c1d67 | 801 | XPROCESS (proc)->gnutls_cred_type = type; |
8af55556 TZ |
802 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_EMPTY; |
803 | ||
8ed70bf3 | 804 | GNUTLS_LOG (1, max_log_level, "allocating credentials"); |
8af55556 | 805 | if (EQ (type, Qgnutls_x509pki)) |
e6059fa2 | 806 | { |
435c1d67 CY |
807 | Lisp_Object verify_flags; |
808 | unsigned int gnutls_verify_flags = GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT; | |
809 | ||
8ed70bf3 | 810 | GNUTLS_LOG (2, max_log_level, "allocating x509 credentials"); |
9cf9f756 | 811 | fn_gnutls_certificate_allocate_credentials (&x509_cred); |
435c1d67 | 812 | XPROCESS (proc)->gnutls_x509_cred = x509_cred; |
e061a11b | 813 | |
435c1d67 | 814 | verify_flags = Fplist_get (proplist, QCgnutls_bootprop_verify_flags); |
e061a11b | 815 | if (NUMBERP (verify_flags)) |
b5f03016 AS |
816 | { |
817 | gnutls_verify_flags = XINT (verify_flags); | |
818 | GNUTLS_LOG (2, max_log_level, "setting verification flags"); | |
819 | } | |
e061a11b | 820 | else if (NILP (verify_flags)) |
435c1d67 | 821 | GNUTLS_LOG (2, max_log_level, "using default verification flags"); |
e061a11b | 822 | else |
435c1d67 CY |
823 | GNUTLS_LOG (2, max_log_level, "ignoring invalid verify-flags"); |
824 | ||
0898ca10 | 825 | fn_gnutls_certificate_set_verify_flags (x509_cred, gnutls_verify_flags); |
e6059fa2 | 826 | } |
435c1d67 | 827 | else /* Qgnutls_anon: */ |
e6059fa2 | 828 | { |
8ed70bf3 | 829 | GNUTLS_LOG (2, max_log_level, "allocating anon credentials"); |
9cf9f756 | 830 | fn_gnutls_anon_allocate_client_credentials (&anon_cred); |
435c1d67 | 831 | XPROCESS (proc)->gnutls_anon_cred = anon_cred; |
e6059fa2 | 832 | } |
8af55556 | 833 | |
8af55556 TZ |
834 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_ALLOC; |
835 | ||
8af55556 | 836 | if (EQ (type, Qgnutls_x509pki)) |
e6059fa2 | 837 | { |
435c1d67 CY |
838 | /* TODO: GNUTLS_X509_FMT_DER is also an option. */ |
839 | int file_format = GNUTLS_X509_FMT_PEM; | |
840 | Lisp_Object tail; | |
841 | ||
c1ae068b | 842 | for (tail = trustfiles; !NILP (tail); tail = Fcdr (tail)) |
e6059fa2 | 843 | { |
c1ae068b | 844 | Lisp_Object trustfile = Fcar (tail); |
b5f03016 AS |
845 | if (STRINGP (trustfile)) |
846 | { | |
847 | GNUTLS_LOG2 (1, max_log_level, "setting the trustfile: ", | |
848 | SSDATA (trustfile)); | |
849 | ret = fn_gnutls_certificate_set_x509_trust_file | |
850 | (x509_cred, | |
851 | SSDATA (trustfile), | |
852 | file_format); | |
853 | ||
854 | if (ret < GNUTLS_E_SUCCESS) | |
855 | return gnutls_make_error (ret); | |
856 | } | |
857 | else | |
858 | { | |
435c1d67 CY |
859 | emacs_gnutls_deinit (proc); |
860 | error ("Invalid trustfile"); | |
b5f03016 AS |
861 | } |
862 | } | |
8af55556 | 863 | |
ff4de4aa | 864 | for (tail = crlfiles; !NILP (tail); tail = Fcdr (tail)) |
e6059fa2 | 865 | { |
ff4de4aa | 866 | Lisp_Object crlfile = Fcar (tail); |
b5f03016 AS |
867 | if (STRINGP (crlfile)) |
868 | { | |
869 | GNUTLS_LOG2 (1, max_log_level, "setting the CRL file: ", | |
870 | SSDATA (crlfile)); | |
871 | ret = fn_gnutls_certificate_set_x509_crl_file | |
435c1d67 | 872 | (x509_cred, SSDATA (crlfile), file_format); |
b5f03016 AS |
873 | |
874 | if (ret < GNUTLS_E_SUCCESS) | |
875 | return gnutls_make_error (ret); | |
876 | } | |
877 | else | |
878 | { | |
435c1d67 CY |
879 | emacs_gnutls_deinit (proc); |
880 | error ("Invalid CRL file"); | |
b5f03016 AS |
881 | } |
882 | } | |
ff4de4aa TZ |
883 | |
884 | for (tail = keylist; !NILP (tail); tail = Fcdr (tail)) | |
885 | { | |
886 | Lisp_Object keyfile = Fcar (Fcar (tail)); | |
887 | Lisp_Object certfile = Fcar (Fcdr (tail)); | |
b5f03016 AS |
888 | if (STRINGP (keyfile) && STRINGP (certfile)) |
889 | { | |
890 | GNUTLS_LOG2 (1, max_log_level, "setting the client key file: ", | |
891 | SSDATA (keyfile)); | |
892 | GNUTLS_LOG2 (1, max_log_level, "setting the client cert file: ", | |
893 | SSDATA (certfile)); | |
894 | ret = fn_gnutls_certificate_set_x509_key_file | |
435c1d67 | 895 | (x509_cred, SSDATA (certfile), SSDATA (keyfile), file_format); |
b5f03016 AS |
896 | |
897 | if (ret < GNUTLS_E_SUCCESS) | |
898 | return gnutls_make_error (ret); | |
899 | } | |
900 | else | |
901 | { | |
435c1d67 CY |
902 | emacs_gnutls_deinit (proc); |
903 | error (STRINGP (keyfile) ? "Invalid client cert file" | |
904 | : "Invalid client key file"); | |
b5f03016 AS |
905 | } |
906 | } | |
e6059fa2 | 907 | } |
8af55556 TZ |
908 | |
909 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_FILES; | |
e061a11b | 910 | GNUTLS_LOG (1, max_log_level, "gnutls callbacks"); |
e061a11b TZ |
911 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CALLBACKS; |
912 | ||
435c1d67 | 913 | /* Call gnutls_init here: */ |
e061a11b | 914 | |
8ed70bf3 | 915 | GNUTLS_LOG (1, max_log_level, "gnutls_init"); |
0898ca10 | 916 | ret = fn_gnutls_init (&state, GNUTLS_CLIENT); |
435c1d67 | 917 | XPROCESS (proc)->gnutls_state = state; |
8af55556 | 918 | if (ret < GNUTLS_E_SUCCESS) |
e6059fa2 | 919 | return gnutls_make_error (ret); |
8af55556 TZ |
920 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT; |
921 | ||
c1ae068b LMI |
922 | if (STRINGP (priority_string)) |
923 | { | |
51b59d79 | 924 | priority_string_ptr = SSDATA (priority_string); |
c1ae068b | 925 | GNUTLS_LOG2 (1, max_log_level, "got non-default priority string:", |
b5f03016 | 926 | priority_string_ptr); |
c1ae068b LMI |
927 | } |
928 | else | |
929 | { | |
930 | GNUTLS_LOG2 (1, max_log_level, "using default priority string:", | |
b5f03016 | 931 | priority_string_ptr); |
c1ae068b | 932 | } |
51b59d79 | 933 | |
8ed70bf3 | 934 | GNUTLS_LOG (1, max_log_level, "setting the priority string"); |
0898ca10 | 935 | ret = fn_gnutls_priority_set_direct (state, |
b5f03016 AS |
936 | priority_string_ptr, |
937 | NULL); | |
8af55556 | 938 | if (ret < GNUTLS_E_SUCCESS) |
e6059fa2 | 939 | return gnutls_make_error (ret); |
8af55556 TZ |
940 | |
941 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_PRIORITY; | |
942 | ||
435c1d67 CY |
943 | if (INTEGERP (prime_bits)) |
944 | fn_gnutls_dh_set_prime_bits (state, XUINT (prime_bits)); | |
8af55556 | 945 | |
435c1d67 CY |
946 | ret = EQ (type, Qgnutls_x509pki) |
947 | ? fn_gnutls_credentials_set (state, GNUTLS_CRD_CERTIFICATE, x509_cred) | |
948 | : fn_gnutls_credentials_set (state, GNUTLS_CRD_ANON, anon_cred); | |
8af55556 | 949 | if (ret < GNUTLS_E_SUCCESS) |
e6059fa2 | 950 | return gnutls_make_error (ret); |
8af55556 | 951 | |
8af55556 | 952 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_SET; |
e061a11b | 953 | ret = emacs_gnutls_handshake (XPROCESS (proc)); |
e061a11b TZ |
954 | if (ret < GNUTLS_E_SUCCESS) |
955 | return gnutls_make_error (ret); | |
956 | ||
957 | /* Now verify the peer, following | |
958 | http://www.gnu.org/software/gnutls/manual/html_node/Verifying-peer_0027s-certificate.html. | |
959 | The peer should present at least one certificate in the chain; do a | |
960 | check of the certificate's hostname with | |
961 | gnutls_x509_crt_check_hostname() against :hostname. */ | |
962 | ||
0898ca10 | 963 | ret = fn_gnutls_certificate_verify_peers2 (state, &peer_verification); |
e061a11b TZ |
964 | if (ret < GNUTLS_E_SUCCESS) |
965 | return gnutls_make_error (ret); | |
671875da | 966 | |
e061a11b | 967 | if (XINT (loglevel) > 0 && peer_verification & GNUTLS_CERT_INVALID) |
435c1d67 CY |
968 | message ("%s certificate could not be verified.", c_hostname); |
969 | ||
970 | if (peer_verification & GNUTLS_CERT_REVOKED) | |
971 | GNUTLS_LOG2 (1, max_log_level, "certificate was revoked (CRL):", | |
972 | c_hostname); | |
973 | ||
974 | if (peer_verification & GNUTLS_CERT_SIGNER_NOT_FOUND) | |
975 | GNUTLS_LOG2 (1, max_log_level, "certificate signer was not found:", | |
976 | c_hostname); | |
977 | ||
978 | if (peer_verification & GNUTLS_CERT_SIGNER_NOT_CA) | |
979 | GNUTLS_LOG2 (1, max_log_level, "certificate signer is not a CA:", | |
980 | c_hostname); | |
981 | ||
982 | if (peer_verification & GNUTLS_CERT_INSECURE_ALGORITHM) | |
983 | GNUTLS_LOG2 (1, max_log_level, | |
984 | "certificate was signed with an insecure algorithm:", | |
985 | c_hostname); | |
986 | ||
987 | if (peer_verification & GNUTLS_CERT_NOT_ACTIVATED) | |
988 | GNUTLS_LOG2 (1, max_log_level, "certificate is not yet activated:", | |
989 | c_hostname); | |
990 | ||
991 | if (peer_verification & GNUTLS_CERT_EXPIRED) | |
992 | GNUTLS_LOG2 (1, max_log_level, "certificate has expired:", | |
993 | c_hostname); | |
994 | ||
995 | if (peer_verification != 0) | |
996 | { | |
997 | if (NILP (verify_hostname_error)) | |
998 | GNUTLS_LOG2 (1, max_log_level, "certificate validation failed:", | |
999 | c_hostname); | |
1000 | else | |
1001 | { | |
1002 | emacs_gnutls_deinit (proc); | |
1003 | error ("Certificate validation failed %s, verification code %d", | |
1004 | c_hostname, peer_verification); | |
1005 | } | |
1006 | } | |
e061a11b TZ |
1007 | |
1008 | /* Up to here the process is the same for X.509 certificates and | |
1009 | OpenPGP keys. From now on X.509 certificates are assumed. This | |
1010 | can be easily extended to work with openpgp keys as well. */ | |
0898ca10 | 1011 | if (fn_gnutls_certificate_type_get (state) == GNUTLS_CRT_X509) |
e061a11b | 1012 | { |
435c1d67 CY |
1013 | gnutls_x509_crt_t gnutls_verify_cert; |
1014 | const gnutls_datum_t *gnutls_verify_cert_list; | |
1015 | unsigned int gnutls_verify_cert_list_size; | |
e061a11b | 1016 | |
435c1d67 | 1017 | ret = fn_gnutls_x509_crt_init (&gnutls_verify_cert); |
e061a11b | 1018 | if (ret < GNUTLS_E_SUCCESS) |
b5f03016 | 1019 | return gnutls_make_error (ret); |
e061a11b | 1020 | |
671875da | 1021 | gnutls_verify_cert_list = |
b5f03016 | 1022 | fn_gnutls_certificate_get_peers (state, &gnutls_verify_cert_list_size); |
e061a11b | 1023 | |
435c1d67 | 1024 | if (gnutls_verify_cert_list == NULL) |
b5f03016 | 1025 | { |
435c1d67 CY |
1026 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); |
1027 | emacs_gnutls_deinit (proc); | |
1028 | error ("No x509 certificate was found\n"); | |
b5f03016 | 1029 | } |
e061a11b TZ |
1030 | |
1031 | /* We only check the first certificate in the given chain. */ | |
0898ca10 | 1032 | ret = fn_gnutls_x509_crt_import (gnutls_verify_cert, |
b5f03016 AS |
1033 | &gnutls_verify_cert_list[0], |
1034 | GNUTLS_X509_FMT_DER); | |
e061a11b TZ |
1035 | |
1036 | if (ret < GNUTLS_E_SUCCESS) | |
b5f03016 AS |
1037 | { |
1038 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); | |
1039 | return gnutls_make_error (ret); | |
1040 | } | |
e061a11b | 1041 | |
0898ca10 | 1042 | if (!fn_gnutls_x509_crt_check_hostname (gnutls_verify_cert, c_hostname)) |
b5f03016 AS |
1043 | { |
1044 | if (NILP (verify_hostname_error)) | |
435c1d67 CY |
1045 | GNUTLS_LOG2 (1, max_log_level, "x509 certificate does not match:", |
1046 | c_hostname); | |
b5f03016 AS |
1047 | else |
1048 | { | |
1049 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); | |
435c1d67 CY |
1050 | emacs_gnutls_deinit (proc); |
1051 | error ("The x509 certificate does not match \"%s\"", c_hostname); | |
b5f03016 AS |
1052 | } |
1053 | } | |
0898ca10 | 1054 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); |
e061a11b TZ |
1055 | } |
1056 | ||
1057 | return gnutls_make_error (ret); | |
8af55556 TZ |
1058 | } |
1059 | ||
1060 | DEFUN ("gnutls-bye", Fgnutls_bye, | |
1061 | Sgnutls_bye, 2, 2, 0, | |
74f1829d | 1062 | doc: /* Terminate current GnuTLS connection for process PROC. |
8af55556 TZ |
1063 | The connection should have been initiated using `gnutls-handshake'. |
1064 | ||
1065 | If CONT is not nil the TLS connection gets terminated and further | |
74f1829d | 1066 | receives and sends will be disallowed. If the return value is zero you |
8af55556 TZ |
1067 | may continue using the connection. If CONT is nil, GnuTLS actually |
1068 | sends an alert containing a close request and waits for the peer to | |
1069 | reply with the same message. In order to reuse the connection you | |
1070 | should wait for an EOF from the peer. | |
1071 | ||
1072 | This function may also return `gnutls-e-again', or | |
1073 | `gnutls-e-interrupted'. */) | |
1074 | (Lisp_Object proc, Lisp_Object cont) | |
1075 | { | |
1076 | gnutls_session_t state; | |
1077 | int ret; | |
1078 | ||
1079 | CHECK_PROCESS (proc); | |
1080 | ||
1081 | state = XPROCESS (proc)->gnutls_state; | |
1082 | ||
0898ca10 | 1083 | ret = fn_gnutls_bye (state, |
b5f03016 | 1084 | NILP (cont) ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR); |
8af55556 TZ |
1085 | |
1086 | return gnutls_make_error (ret); | |
1087 | } | |
1088 | ||
8af55556 TZ |
1089 | void |
1090 | syms_of_gnutls (void) | |
1091 | { | |
e061a11b TZ |
1092 | gnutls_global_initialized = 0; |
1093 | ||
a555cb87 | 1094 | DEFSYM (Qgnutls_dll, "gnutls"); |
a555cb87 JB |
1095 | DEFSYM (Qgnutls_code, "gnutls-code"); |
1096 | DEFSYM (Qgnutls_anon, "gnutls-anon"); | |
1097 | DEFSYM (Qgnutls_x509pki, "gnutls-x509pki"); | |
a3720aa2 AS |
1098 | DEFSYM (QCgnutls_bootprop_hostname, ":hostname"); |
1099 | DEFSYM (QCgnutls_bootprop_priority, ":priority"); | |
1100 | DEFSYM (QCgnutls_bootprop_trustfiles, ":trustfiles"); | |
1101 | DEFSYM (QCgnutls_bootprop_keylist, ":keylist"); | |
1102 | DEFSYM (QCgnutls_bootprop_crlfiles, ":crlfiles"); | |
1103 | DEFSYM (QCgnutls_bootprop_callbacks, ":callbacks"); | |
1104 | DEFSYM (QCgnutls_bootprop_callbacks_verify, "verify"); | |
1105 | DEFSYM (QCgnutls_bootprop_min_prime_bits, ":min-prime-bits"); | |
1106 | DEFSYM (QCgnutls_bootprop_loglevel, ":loglevel"); | |
1107 | DEFSYM (QCgnutls_bootprop_verify_flags, ":verify-flags"); | |
1108 | DEFSYM (QCgnutls_bootprop_verify_hostname_error, ":verify-hostname-error"); | |
a555cb87 JB |
1109 | |
1110 | DEFSYM (Qgnutls_e_interrupted, "gnutls-e-interrupted"); | |
8af55556 | 1111 | Fput (Qgnutls_e_interrupted, Qgnutls_code, |
b5f03016 | 1112 | make_number (GNUTLS_E_INTERRUPTED)); |
8af55556 | 1113 | |
a555cb87 | 1114 | DEFSYM (Qgnutls_e_again, "gnutls-e-again"); |
8af55556 | 1115 | Fput (Qgnutls_e_again, Qgnutls_code, |
b5f03016 | 1116 | make_number (GNUTLS_E_AGAIN)); |
8af55556 | 1117 | |
a555cb87 | 1118 | DEFSYM (Qgnutls_e_invalid_session, "gnutls-e-invalid-session"); |
8af55556 | 1119 | Fput (Qgnutls_e_invalid_session, Qgnutls_code, |
b5f03016 | 1120 | make_number (GNUTLS_E_INVALID_SESSION)); |
8af55556 | 1121 | |
a555cb87 | 1122 | DEFSYM (Qgnutls_e_not_ready_for_handshake, "gnutls-e-not-ready-for-handshake"); |
8af55556 | 1123 | Fput (Qgnutls_e_not_ready_for_handshake, Qgnutls_code, |
b5f03016 | 1124 | make_number (GNUTLS_E_APPLICATION_ERROR_MIN)); |
8af55556 TZ |
1125 | |
1126 | defsubr (&Sgnutls_get_initstage); | |
1127 | defsubr (&Sgnutls_errorp); | |
1128 | defsubr (&Sgnutls_error_fatalp); | |
1129 | defsubr (&Sgnutls_error_string); | |
1130 | defsubr (&Sgnutls_boot); | |
1131 | defsubr (&Sgnutls_deinit); | |
8af55556 | 1132 | defsubr (&Sgnutls_bye); |
0898ca10 | 1133 | defsubr (&Sgnutls_available_p); |
750c33f7 | 1134 | |
925a6be7 | 1135 | DEFVAR_INT ("gnutls-log-level", global_gnutls_log_level, |
31fd3586 GM |
1136 | doc: /* Logging level used by the GnuTLS functions. |
1137 | Set this larger than 0 to get debug output in the *Messages* buffer. | |
1138 | 1 is for important messages, 2 is for debug data, and higher numbers | |
1139 | are as per the GnuTLS logging conventions. */); | |
925a6be7 | 1140 | global_gnutls_log_level = 0; |
8af55556 | 1141 | } |
bafcf6a5 JB |
1142 | |
1143 | #endif /* HAVE_GNUTLS */ |