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8af55556 | 1 | /* GnuTLS glue for GNU Emacs. |
ab422c4d | 2 | Copyright (C) 2010-2013 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> | |
8af55556 TZ |
21 | |
22 | #include "lisp.h" | |
23 | #include "process.h" | |
24 | ||
25 | #ifdef HAVE_GNUTLS | |
26 | #include <gnutls/gnutls.h> | |
27 | ||
e061a11b TZ |
28 | #ifdef WINDOWSNT |
29 | #include <windows.h> | |
30 | #include "w32.h" | |
31 | #endif | |
32 | ||
18e27ea8 | 33 | static bool emacs_gnutls_handle_error (gnutls_session_t, int); |
e061a11b | 34 | |
0898ca10 | 35 | static Lisp_Object Qgnutls_dll; |
bafcf6a5 JB |
36 | static Lisp_Object Qgnutls_code; |
37 | static Lisp_Object Qgnutls_anon, Qgnutls_x509pki; | |
38 | static Lisp_Object Qgnutls_e_interrupted, Qgnutls_e_again, | |
8af55556 | 39 | Qgnutls_e_invalid_session, Qgnutls_e_not_ready_for_handshake; |
18e27ea8 | 40 | static bool gnutls_global_initialized; |
8af55556 | 41 | |
c1ae068b | 42 | /* The following are for the property list of `gnutls-boot'. */ |
a3720aa2 AS |
43 | static Lisp_Object QCgnutls_bootprop_priority; |
44 | static Lisp_Object QCgnutls_bootprop_trustfiles; | |
45 | static Lisp_Object QCgnutls_bootprop_keylist; | |
46 | static Lisp_Object QCgnutls_bootprop_crlfiles; | |
47 | static Lisp_Object QCgnutls_bootprop_callbacks; | |
48 | static Lisp_Object QCgnutls_bootprop_loglevel; | |
49 | static Lisp_Object QCgnutls_bootprop_hostname; | |
50 | static Lisp_Object QCgnutls_bootprop_min_prime_bits; | |
51 | static Lisp_Object QCgnutls_bootprop_verify_flags; | |
52 | static Lisp_Object QCgnutls_bootprop_verify_hostname_error; | |
e061a11b TZ |
53 | |
54 | /* Callback keys for `gnutls-boot'. Unused currently. */ | |
a3720aa2 | 55 | static Lisp_Object QCgnutls_bootprop_callbacks_verify; |
c1ae068b | 56 | |
0898ca10 JB |
57 | static void gnutls_log_function (int, const char *); |
58 | static void gnutls_log_function2 (int, const char*, const char*); | |
8e2d7ef2 JD |
59 | #ifdef HAVE_GNUTLS3 |
60 | static void gnutls_audit_log_function (gnutls_session_t, const char *); | |
61 | #endif | |
0898ca10 JB |
62 | |
63 | \f | |
64 | #ifdef WINDOWSNT | |
65 | ||
66 | /* Macro for defining functions that will be loaded from the GnuTLS DLL. */ | |
dbdb9a7c | 67 | #define DEF_GNUTLS_FN(rettype,func,args) static rettype (FAR CDECL *fn_##func)args |
0898ca10 JB |
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, | |
b5f03016 | 76 | (gnutls_session_t)); |
0898ca10 | 77 | DEF_GNUTLS_FN (const char *, gnutls_alert_get_name, |
b5f03016 | 78 | (gnutls_alert_description_t)); |
0898ca10 JB |
79 | DEF_GNUTLS_FN (int, gnutls_alert_send_appropriate, (gnutls_session_t, int)); |
80 | DEF_GNUTLS_FN (int, gnutls_anon_allocate_client_credentials, | |
b5f03016 | 81 | (gnutls_anon_client_credentials_t *)); |
0898ca10 | 82 | DEF_GNUTLS_FN (void, gnutls_anon_free_client_credentials, |
b5f03016 | 83 | (gnutls_anon_client_credentials_t)); |
0898ca10 JB |
84 | DEF_GNUTLS_FN (int, gnutls_bye, (gnutls_session_t, gnutls_close_request_t)); |
85 | DEF_GNUTLS_FN (int, gnutls_certificate_allocate_credentials, | |
b5f03016 | 86 | (gnutls_certificate_credentials_t *)); |
0898ca10 | 87 | DEF_GNUTLS_FN (void, gnutls_certificate_free_credentials, |
b5f03016 | 88 | (gnutls_certificate_credentials_t)); |
0898ca10 | 89 | DEF_GNUTLS_FN (const gnutls_datum_t *, gnutls_certificate_get_peers, |
b5f03016 | 90 | (gnutls_session_t, unsigned int *)); |
0898ca10 | 91 | DEF_GNUTLS_FN (void, gnutls_certificate_set_verify_flags, |
b5f03016 | 92 | (gnutls_certificate_credentials_t, unsigned int)); |
0898ca10 | 93 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_crl_file, |
b5f03016 AS |
94 | (gnutls_certificate_credentials_t, const char *, |
95 | gnutls_x509_crt_fmt_t)); | |
0898ca10 | 96 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_key_file, |
b5f03016 AS |
97 | (gnutls_certificate_credentials_t, const char *, const char *, |
98 | gnutls_x509_crt_fmt_t)); | |
0898ca10 | 99 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_trust_file, |
b5f03016 AS |
100 | (gnutls_certificate_credentials_t, const char *, |
101 | gnutls_x509_crt_fmt_t)); | |
0898ca10 | 102 | DEF_GNUTLS_FN (gnutls_certificate_type_t, gnutls_certificate_type_get, |
b5f03016 | 103 | (gnutls_session_t)); |
0898ca10 | 104 | DEF_GNUTLS_FN (int, gnutls_certificate_verify_peers2, |
b5f03016 | 105 | (gnutls_session_t, unsigned int *)); |
0898ca10 | 106 | DEF_GNUTLS_FN (int, gnutls_credentials_set, |
b5f03016 | 107 | (gnutls_session_t, gnutls_credentials_type_t, void *)); |
0898ca10 | 108 | DEF_GNUTLS_FN (void, gnutls_deinit, (gnutls_session_t)); |
87e86684 | 109 | DEF_GNUTLS_FN (void, gnutls_dh_set_prime_bits, |
b5f03016 | 110 | (gnutls_session_t, unsigned int)); |
0898ca10 JB |
111 | DEF_GNUTLS_FN (int, gnutls_error_is_fatal, (int)); |
112 | DEF_GNUTLS_FN (int, gnutls_global_init, (void)); | |
113 | DEF_GNUTLS_FN (void, gnutls_global_set_log_function, (gnutls_log_func)); | |
e1f9f9e3 TZ |
114 | #ifdef HAVE_GNUTLS3 |
115 | DEF_GNUTLS_FN (void, gnutls_global_set_audit_log_function, (gnutls_audit_log_func)); | |
116 | #endif | |
0898ca10 | 117 | DEF_GNUTLS_FN (void, gnutls_global_set_log_level, (int)); |
9cf9f756 PE |
118 | DEF_GNUTLS_FN (void, gnutls_global_set_mem_functions, |
119 | (gnutls_alloc_function, gnutls_alloc_function, | |
120 | gnutls_is_secure_function, gnutls_realloc_function, | |
121 | gnutls_free_function)); | |
0898ca10 JB |
122 | DEF_GNUTLS_FN (int, gnutls_handshake, (gnutls_session_t)); |
123 | DEF_GNUTLS_FN (int, gnutls_init, (gnutls_session_t *, gnutls_connection_end_t)); | |
124 | DEF_GNUTLS_FN (int, gnutls_priority_set_direct, | |
b5f03016 | 125 | (gnutls_session_t, const char *, const char **)); |
0898ca10 JB |
126 | DEF_GNUTLS_FN (size_t, gnutls_record_check_pending, (gnutls_session_t)); |
127 | DEF_GNUTLS_FN (ssize_t, gnutls_record_recv, (gnutls_session_t, void *, size_t)); | |
128 | DEF_GNUTLS_FN (ssize_t, gnutls_record_send, | |
b5f03016 | 129 | (gnutls_session_t, const void *, size_t)); |
0898ca10 JB |
130 | DEF_GNUTLS_FN (const char *, gnutls_strerror, (int)); |
131 | DEF_GNUTLS_FN (void, gnutls_transport_set_errno, (gnutls_session_t, int)); | |
651e947e | 132 | DEF_GNUTLS_FN (const char *, gnutls_check_version, (const char *)); |
0898ca10 JB |
133 | DEF_GNUTLS_FN (void, gnutls_transport_set_lowat, (gnutls_session_t, int)); |
134 | DEF_GNUTLS_FN (void, gnutls_transport_set_ptr2, | |
b5f03016 AS |
135 | (gnutls_session_t, gnutls_transport_ptr_t, |
136 | gnutls_transport_ptr_t)); | |
0898ca10 | 137 | DEF_GNUTLS_FN (void, gnutls_transport_set_pull_function, |
b5f03016 | 138 | (gnutls_session_t, gnutls_pull_func)); |
0898ca10 | 139 | DEF_GNUTLS_FN (void, gnutls_transport_set_push_function, |
b5f03016 | 140 | (gnutls_session_t, gnutls_push_func)); |
0898ca10 | 141 | DEF_GNUTLS_FN (int, gnutls_x509_crt_check_hostname, |
b5f03016 | 142 | (gnutls_x509_crt_t, const char *)); |
0898ca10 JB |
143 | DEF_GNUTLS_FN (void, gnutls_x509_crt_deinit, (gnutls_x509_crt_t)); |
144 | DEF_GNUTLS_FN (int, gnutls_x509_crt_import, | |
b5f03016 AS |
145 | (gnutls_x509_crt_t, const gnutls_datum_t *, |
146 | gnutls_x509_crt_fmt_t)); | |
0898ca10 JB |
147 | DEF_GNUTLS_FN (int, gnutls_x509_crt_init, (gnutls_x509_crt_t *)); |
148 | ||
18e27ea8 | 149 | static bool |
d07ff9db | 150 | init_gnutls_functions (void) |
0898ca10 JB |
151 | { |
152 | HMODULE library; | |
ac389d0c | 153 | int max_log_level = 1; |
0898ca10 | 154 | |
d07ff9db | 155 | if (!(library = w32_delayed_load (Qgnutls_dll))) |
0898ca10 | 156 | { |
ac389d0c | 157 | GNUTLS_LOG (1, max_log_level, "GnuTLS library not found"); |
0898ca10 JB |
158 | return 0; |
159 | } | |
160 | ||
161 | LOAD_GNUTLS_FN (library, gnutls_alert_get); | |
162 | LOAD_GNUTLS_FN (library, gnutls_alert_get_name); | |
163 | LOAD_GNUTLS_FN (library, gnutls_alert_send_appropriate); | |
164 | LOAD_GNUTLS_FN (library, gnutls_anon_allocate_client_credentials); | |
165 | LOAD_GNUTLS_FN (library, gnutls_anon_free_client_credentials); | |
166 | LOAD_GNUTLS_FN (library, gnutls_bye); | |
167 | LOAD_GNUTLS_FN (library, gnutls_certificate_allocate_credentials); | |
168 | LOAD_GNUTLS_FN (library, gnutls_certificate_free_credentials); | |
169 | LOAD_GNUTLS_FN (library, gnutls_certificate_get_peers); | |
170 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_verify_flags); | |
171 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_crl_file); | |
172 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_key_file); | |
173 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_trust_file); | |
174 | LOAD_GNUTLS_FN (library, gnutls_certificate_type_get); | |
175 | LOAD_GNUTLS_FN (library, gnutls_certificate_verify_peers2); | |
176 | LOAD_GNUTLS_FN (library, gnutls_credentials_set); | |
177 | LOAD_GNUTLS_FN (library, gnutls_deinit); | |
87e86684 | 178 | LOAD_GNUTLS_FN (library, gnutls_dh_set_prime_bits); |
0898ca10 JB |
179 | LOAD_GNUTLS_FN (library, gnutls_error_is_fatal); |
180 | LOAD_GNUTLS_FN (library, gnutls_global_init); | |
181 | LOAD_GNUTLS_FN (library, gnutls_global_set_log_function); | |
e1f9f9e3 TZ |
182 | #ifdef HAVE_GNUTLS3 |
183 | LOAD_GNUTLS_FN (library, gnutls_global_set_audit_log_function); | |
184 | #endif | |
0898ca10 | 185 | LOAD_GNUTLS_FN (library, gnutls_global_set_log_level); |
9cf9f756 | 186 | LOAD_GNUTLS_FN (library, gnutls_global_set_mem_functions); |
0898ca10 JB |
187 | LOAD_GNUTLS_FN (library, gnutls_handshake); |
188 | LOAD_GNUTLS_FN (library, gnutls_init); | |
189 | LOAD_GNUTLS_FN (library, gnutls_priority_set_direct); | |
190 | LOAD_GNUTLS_FN (library, gnutls_record_check_pending); | |
191 | LOAD_GNUTLS_FN (library, gnutls_record_recv); | |
192 | LOAD_GNUTLS_FN (library, gnutls_record_send); | |
193 | LOAD_GNUTLS_FN (library, gnutls_strerror); | |
194 | LOAD_GNUTLS_FN (library, gnutls_transport_set_errno); | |
651e947e EZ |
195 | LOAD_GNUTLS_FN (library, gnutls_check_version); |
196 | /* We don't need to call gnutls_transport_set_lowat in GnuTLS 2.11.1 | |
197 | and later, and the function was removed entirely in 3.0.0. */ | |
198 | if (!fn_gnutls_check_version ("2.11.1")) | |
199 | LOAD_GNUTLS_FN (library, gnutls_transport_set_lowat); | |
0898ca10 JB |
200 | LOAD_GNUTLS_FN (library, gnutls_transport_set_ptr2); |
201 | LOAD_GNUTLS_FN (library, gnutls_transport_set_pull_function); | |
202 | LOAD_GNUTLS_FN (library, gnutls_transport_set_push_function); | |
203 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_check_hostname); | |
204 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_deinit); | |
205 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_import); | |
206 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_init); | |
207 | ||
925a6be7 | 208 | max_log_level = global_gnutls_log_level; |
ac389d0c | 209 | |
d69621cc JB |
210 | { |
211 | Lisp_Object name = CAR_SAFE (Fget (Qgnutls_dll, QCloaded_from)); | |
212 | GNUTLS_LOG2 (1, max_log_level, "GnuTLS library loaded:", | |
213 | STRINGP (name) ? (const char *) SDATA (name) : "unknown"); | |
214 | } | |
215 | ||
0898ca10 JB |
216 | return 1; |
217 | } | |
218 | ||
219 | #else /* !WINDOWSNT */ | |
220 | ||
221 | #define fn_gnutls_alert_get gnutls_alert_get | |
222 | #define fn_gnutls_alert_get_name gnutls_alert_get_name | |
223 | #define fn_gnutls_alert_send_appropriate gnutls_alert_send_appropriate | |
224 | #define fn_gnutls_anon_allocate_client_credentials gnutls_anon_allocate_client_credentials | |
225 | #define fn_gnutls_anon_free_client_credentials gnutls_anon_free_client_credentials | |
226 | #define fn_gnutls_bye gnutls_bye | |
227 | #define fn_gnutls_certificate_allocate_credentials gnutls_certificate_allocate_credentials | |
228 | #define fn_gnutls_certificate_free_credentials gnutls_certificate_free_credentials | |
229 | #define fn_gnutls_certificate_get_peers gnutls_certificate_get_peers | |
230 | #define fn_gnutls_certificate_set_verify_flags gnutls_certificate_set_verify_flags | |
231 | #define fn_gnutls_certificate_set_x509_crl_file gnutls_certificate_set_x509_crl_file | |
639c109b | 232 | #define fn_gnutls_certificate_set_x509_key_file gnutls_certificate_set_x509_key_file |
520cf78a | 233 | #define fn_gnutls_certificate_set_x509_trust_file gnutls_certificate_set_x509_trust_file |
0898ca10 JB |
234 | #define fn_gnutls_certificate_type_get gnutls_certificate_type_get |
235 | #define fn_gnutls_certificate_verify_peers2 gnutls_certificate_verify_peers2 | |
236 | #define fn_gnutls_credentials_set gnutls_credentials_set | |
237 | #define fn_gnutls_deinit gnutls_deinit | |
87e86684 | 238 | #define fn_gnutls_dh_set_prime_bits gnutls_dh_set_prime_bits |
0898ca10 JB |
239 | #define fn_gnutls_error_is_fatal gnutls_error_is_fatal |
240 | #define fn_gnutls_global_init gnutls_global_init | |
241 | #define fn_gnutls_global_set_log_function gnutls_global_set_log_function | |
e1f9f9e3 TZ |
242 | #ifdef HAVE_GNUTLS3 |
243 | #define fn_gnutls_global_set_audit_log_function gnutls_global_set_audit_log_function | |
244 | #endif | |
0898ca10 | 245 | #define fn_gnutls_global_set_log_level gnutls_global_set_log_level |
9cf9f756 | 246 | #define fn_gnutls_global_set_mem_functions gnutls_global_set_mem_functions |
0898ca10 JB |
247 | #define fn_gnutls_handshake gnutls_handshake |
248 | #define fn_gnutls_init gnutls_init | |
249 | #define fn_gnutls_priority_set_direct gnutls_priority_set_direct | |
250 | #define fn_gnutls_record_check_pending gnutls_record_check_pending | |
251 | #define fn_gnutls_record_recv gnutls_record_recv | |
252 | #define fn_gnutls_record_send gnutls_record_send | |
253 | #define fn_gnutls_strerror gnutls_strerror | |
3d798ba7 | 254 | #ifdef WINDOWSNT |
0898ca10 | 255 | #define fn_gnutls_transport_set_errno gnutls_transport_set_errno |
3d798ba7 | 256 | #endif |
0898ca10 | 257 | #define fn_gnutls_transport_set_ptr2 gnutls_transport_set_ptr2 |
0898ca10 JB |
258 | #define fn_gnutls_x509_crt_check_hostname gnutls_x509_crt_check_hostname |
259 | #define fn_gnutls_x509_crt_deinit gnutls_x509_crt_deinit | |
260 | #define fn_gnutls_x509_crt_import gnutls_x509_crt_import | |
261 | #define fn_gnutls_x509_crt_init gnutls_x509_crt_init | |
262 | ||
263 | #endif /* !WINDOWSNT */ | |
264 | ||
265 | \f | |
8e2d7ef2 | 266 | #ifdef HAVE_GNUTLS3 |
e1f9f9e3 TZ |
267 | /* Function to log a simple audit message. */ |
268 | static void | |
269 | gnutls_audit_log_function (gnutls_session_t session, const char* string) | |
270 | { | |
271 | if (global_gnutls_log_level >= 1) | |
272 | { | |
273 | message ("gnutls.c: [audit] %s", string); | |
274 | } | |
275 | } | |
8e2d7ef2 | 276 | #endif |
e1f9f9e3 | 277 | |
a18ecafa | 278 | /* Function to log a simple message. */ |
74f1829d | 279 | static void |
e061a11b TZ |
280 | gnutls_log_function (int level, const char* string) |
281 | { | |
282 | message ("gnutls.c: [%d] %s", level, string); | |
283 | } | |
284 | ||
a18ecafa | 285 | /* Function to log a message and a string. */ |
e061a11b TZ |
286 | static void |
287 | gnutls_log_function2 (int level, const char* string, const char* extra) | |
288 | { | |
289 | message ("gnutls.c: [%d] %s %s", level, string, extra); | |
290 | } | |
291 | ||
a18ecafa TZ |
292 | /* Function to log a message and an integer. */ |
293 | static void | |
294 | gnutls_log_function2i (int level, const char* string, int extra) | |
295 | { | |
296 | message ("gnutls.c: [%d] %s %d", level, string, extra); | |
297 | } | |
298 | ||
e061a11b | 299 | static int |
bac5cef8 LMI |
300 | emacs_gnutls_handshake (struct Lisp_Process *proc) |
301 | { | |
302 | gnutls_session_t state = proc->gnutls_state; | |
303 | int ret; | |
304 | ||
305 | if (proc->gnutls_initstage < GNUTLS_STAGE_HANDSHAKE_CANDO) | |
6a7a1b0b | 306 | return -1; |
bac5cef8 LMI |
307 | |
308 | if (proc->gnutls_initstage < GNUTLS_STAGE_TRANSPORT_POINTERS_SET) | |
e6059fa2 | 309 | { |
e061a11b TZ |
310 | #ifdef WINDOWSNT |
311 | /* On W32 we cannot transfer socket handles between different runtime | |
b5f03016 AS |
312 | libraries, so we tell GnuTLS to use our special push/pull |
313 | functions. */ | |
0898ca10 | 314 | fn_gnutls_transport_set_ptr2 (state, |
b5f03016 AS |
315 | (gnutls_transport_ptr_t) proc, |
316 | (gnutls_transport_ptr_t) proc); | |
0898ca10 JB |
317 | fn_gnutls_transport_set_push_function (state, &emacs_gnutls_push); |
318 | fn_gnutls_transport_set_pull_function (state, &emacs_gnutls_pull); | |
e061a11b TZ |
319 | |
320 | /* For non blocking sockets or other custom made pull/push | |
b5f03016 AS |
321 | functions the gnutls_transport_set_lowat must be called, with |
322 | a zero low water mark value. (GnuTLS 2.10.4 documentation) | |
e061a11b | 323 | |
b5f03016 AS |
324 | (Note: this is probably not strictly necessary as the lowat |
325 | value is only used when no custom pull/push functions are | |
326 | set.) */ | |
651e947e EZ |
327 | /* According to GnuTLS NEWS file, lowat level has been set to |
328 | zero by default in version 2.11.1, and the function | |
329 | gnutls_transport_set_lowat was removed from the library in | |
330 | version 2.99.0. */ | |
331 | if (!fn_gnutls_check_version ("2.11.1")) | |
332 | fn_gnutls_transport_set_lowat (state, 0); | |
e061a11b | 333 | #else |
c1ae068b | 334 | /* This is how GnuTLS takes sockets: as file descriptors passed |
b5f03016 AS |
335 | in. For an Emacs process socket, infd and outfd are the |
336 | same but we use this two-argument version for clarity. */ | |
0898ca10 | 337 | fn_gnutls_transport_set_ptr2 (state, |
b5f03016 AS |
338 | (gnutls_transport_ptr_t) (long) proc->infd, |
339 | (gnutls_transport_ptr_t) (long) proc->outfd); | |
e061a11b | 340 | #endif |
bac5cef8 | 341 | |
e6059fa2 LMI |
342 | proc->gnutls_initstage = GNUTLS_STAGE_TRANSPORT_POINTERS_SET; |
343 | } | |
bac5cef8 | 344 | |
e061a11b TZ |
345 | do |
346 | { | |
0898ca10 | 347 | ret = fn_gnutls_handshake (state); |
e061a11b | 348 | emacs_gnutls_handle_error (state, ret); |
57570cd3 | 349 | QUIT; |
e061a11b | 350 | } |
0898ca10 | 351 | while (ret < 0 && fn_gnutls_error_is_fatal (ret) == 0); |
e061a11b | 352 | |
bac5cef8 LMI |
353 | proc->gnutls_initstage = GNUTLS_STAGE_HANDSHAKE_TRIED; |
354 | ||
355 | if (ret == GNUTLS_E_SUCCESS) | |
e6059fa2 | 356 | { |
e061a11b | 357 | /* Here we're finally done. */ |
e6059fa2 LMI |
358 | proc->gnutls_initstage = GNUTLS_STAGE_READY; |
359 | } | |
e061a11b TZ |
360 | else |
361 | { | |
0898ca10 | 362 | fn_gnutls_alert_send_appropriate (state, ret); |
e061a11b TZ |
363 | } |
364 | return ret; | |
bac5cef8 LMI |
365 | } |
366 | ||
0898ca10 JB |
367 | int |
368 | emacs_gnutls_record_check_pending (gnutls_session_t state) | |
369 | { | |
370 | return fn_gnutls_record_check_pending (state); | |
371 | } | |
372 | ||
3d798ba7 | 373 | #ifdef WINDOWSNT |
0898ca10 JB |
374 | void |
375 | emacs_gnutls_transport_set_errno (gnutls_session_t state, int err) | |
376 | { | |
377 | fn_gnutls_transport_set_errno (state, err); | |
378 | } | |
3d798ba7 | 379 | #endif |
0898ca10 | 380 | |
d311d28c PE |
381 | ptrdiff_t |
382 | emacs_gnutls_write (struct Lisp_Process *proc, const char *buf, ptrdiff_t nbyte) | |
8af55556 | 383 | { |
c8926152 | 384 | ssize_t rtnval = 0; |
d311d28c | 385 | ptrdiff_t bytes_written; |
df7fcaff LMI |
386 | gnutls_session_t state = proc->gnutls_state; |
387 | ||
0ca43699 AS |
388 | if (proc->gnutls_initstage != GNUTLS_STAGE_READY) |
389 | { | |
0ca43699 | 390 | errno = EAGAIN; |
0ca43699 AS |
391 | return 0; |
392 | } | |
8af55556 TZ |
393 | |
394 | bytes_written = 0; | |
395 | ||
396 | while (nbyte > 0) | |
397 | { | |
0898ca10 | 398 | rtnval = fn_gnutls_record_send (state, buf, nbyte); |
8af55556 | 399 | |
2e6c74c5 | 400 | if (rtnval < 0) |
b5f03016 | 401 | { |
77abcbc2 | 402 | if (rtnval == GNUTLS_E_INTERRUPTED) |
b5f03016 AS |
403 | continue; |
404 | else | |
0ca43699 AS |
405 | { |
406 | /* If we get GNUTLS_E_AGAIN, then set errno | |
407 | appropriately so that send_process retries the | |
408 | correct way instead of erroring out. */ | |
409 | if (rtnval == GNUTLS_E_AGAIN) | |
22626a85 | 410 | errno = EAGAIN; |
0ca43699 | 411 | break; |
2e8f3c56 | 412 | } |
b5f03016 | 413 | } |
8af55556 TZ |
414 | |
415 | buf += rtnval; | |
416 | nbyte -= rtnval; | |
417 | bytes_written += rtnval; | |
418 | } | |
8af55556 | 419 | |
e061a11b | 420 | emacs_gnutls_handle_error (state, rtnval); |
8af55556 TZ |
421 | return (bytes_written); |
422 | } | |
423 | ||
d311d28c PE |
424 | ptrdiff_t |
425 | emacs_gnutls_read (struct Lisp_Process *proc, char *buf, ptrdiff_t nbyte) | |
8af55556 | 426 | { |
368f4090 | 427 | ssize_t rtnval; |
df7fcaff LMI |
428 | gnutls_session_t state = proc->gnutls_state; |
429 | ||
a18ecafa TZ |
430 | int log_level = proc->gnutls_log_level; |
431 | ||
e6059fa2 LMI |
432 | if (proc->gnutls_initstage != GNUTLS_STAGE_READY) |
433 | { | |
a18ecafa TZ |
434 | /* If the handshake count is under the limit, try the handshake |
435 | again and increment the handshake count. This count is kept | |
436 | per process (connection), not globally. */ | |
437 | if (proc->gnutls_handshakes_tried < GNUTLS_EMACS_HANDSHAKES_LIMIT) | |
438 | { | |
439 | proc->gnutls_handshakes_tried++; | |
440 | emacs_gnutls_handshake (proc); | |
02fd101b | 441 | GNUTLS_LOG2i (5, log_level, "Retried handshake", |
a18ecafa TZ |
442 | proc->gnutls_handshakes_tried); |
443 | return -1; | |
444 | } | |
445 | ||
446 | GNUTLS_LOG (2, log_level, "Giving up on handshake; resetting retries"); | |
447 | proc->gnutls_handshakes_tried = 0; | |
448 | return 0; | |
e6059fa2 | 449 | } |
0898ca10 | 450 | rtnval = fn_gnutls_record_recv (state, buf, nbyte); |
ec9f09be LMI |
451 | if (rtnval >= 0) |
452 | return rtnval; | |
dbf38e02 LMI |
453 | else if (rtnval == GNUTLS_E_UNEXPECTED_PACKET_LENGTH) |
454 | /* The peer closed the connection. */ | |
455 | return 0; | |
18e27ea8 | 456 | else if (emacs_gnutls_handle_error (state, rtnval)) |
e061a11b TZ |
457 | /* non-fatal error */ |
458 | return -1; | |
4b2d9ec2 | 459 | else { |
9173deec | 460 | /* a fatal error occurred */ |
e061a11b | 461 | return 0; |
4b2d9ec2 | 462 | } |
8af55556 TZ |
463 | } |
464 | ||
18e27ea8 PE |
465 | /* Report a GnuTLS error to the user. |
466 | Return true if the error code was successfully handled. */ | |
467 | static bool | |
e061a11b TZ |
468 | emacs_gnutls_handle_error (gnutls_session_t session, int err) |
469 | { | |
e061a11b TZ |
470 | int max_log_level = 0; |
471 | ||
18e27ea8 | 472 | bool ret; |
e061a11b TZ |
473 | const char *str; |
474 | ||
475 | /* TODO: use a Lisp_Object generated by gnutls_make_error? */ | |
476 | if (err >= 0) | |
18e27ea8 | 477 | return 1; |
e061a11b | 478 | |
925a6be7 | 479 | max_log_level = global_gnutls_log_level; |
e061a11b TZ |
480 | |
481 | /* TODO: use gnutls-error-fatalp and gnutls-error-string. */ | |
482 | ||
0898ca10 | 483 | str = fn_gnutls_strerror (err); |
e061a11b TZ |
484 | if (!str) |
485 | str = "unknown"; | |
486 | ||
0898ca10 | 487 | if (fn_gnutls_error_is_fatal (err)) |
e061a11b | 488 | { |
18e27ea8 | 489 | ret = 0; |
e061a11b TZ |
490 | GNUTLS_LOG2 (0, max_log_level, "fatal error:", str); |
491 | } | |
492 | else | |
493 | { | |
18e27ea8 | 494 | ret = 1; |
194b4d9f TZ |
495 | |
496 | switch (err) | |
497 | { | |
498 | case GNUTLS_E_AGAIN: | |
499 | GNUTLS_LOG2 (3, | |
500 | max_log_level, | |
501 | "retry:", | |
502 | str); | |
503 | default: | |
504 | GNUTLS_LOG2 (1, | |
505 | max_log_level, | |
506 | "non-fatal error:", | |
507 | str); | |
508 | } | |
e061a11b TZ |
509 | } |
510 | ||
511 | if (err == GNUTLS_E_WARNING_ALERT_RECEIVED | |
512 | || err == GNUTLS_E_FATAL_ALERT_RECEIVED) | |
513 | { | |
0898ca10 | 514 | int alert = fn_gnutls_alert_get (session); |
e061a11b | 515 | int level = (err == GNUTLS_E_FATAL_ALERT_RECEIVED) ? 0 : 1; |
0898ca10 | 516 | str = fn_gnutls_alert_get_name (alert); |
e061a11b TZ |
517 | if (!str) |
518 | str = "unknown"; | |
519 | ||
520 | GNUTLS_LOG2 (level, max_log_level, "Received alert: ", str); | |
521 | } | |
522 | return ret; | |
523 | } | |
524 | ||
8af55556 TZ |
525 | /* convert an integer error to a Lisp_Object; it will be either a |
526 | known symbol like `gnutls_e_interrupted' and `gnutls_e_again' or | |
527 | simply the integer value of the error. GNUTLS_E_SUCCESS is mapped | |
528 | to Qt. */ | |
74f1829d | 529 | static Lisp_Object |
ec8df744 | 530 | gnutls_make_error (int err) |
8af55556 | 531 | { |
ec8df744 | 532 | switch (err) |
e6059fa2 LMI |
533 | { |
534 | case GNUTLS_E_SUCCESS: | |
535 | return Qt; | |
536 | case GNUTLS_E_AGAIN: | |
537 | return Qgnutls_e_again; | |
538 | case GNUTLS_E_INTERRUPTED: | |
539 | return Qgnutls_e_interrupted; | |
540 | case GNUTLS_E_INVALID_SESSION: | |
541 | return Qgnutls_e_invalid_session; | |
542 | } | |
8af55556 | 543 | |
ec8df744 | 544 | return make_number (err); |
8af55556 TZ |
545 | } |
546 | ||
9c6c6f49 CY |
547 | Lisp_Object |
548 | emacs_gnutls_deinit (Lisp_Object proc) | |
549 | { | |
550 | int log_level; | |
551 | ||
552 | CHECK_PROCESS (proc); | |
553 | ||
554 | if (XPROCESS (proc)->gnutls_p == 0) | |
555 | return Qnil; | |
556 | ||
557 | log_level = XPROCESS (proc)->gnutls_log_level; | |
558 | ||
559 | if (XPROCESS (proc)->gnutls_x509_cred) | |
560 | { | |
561 | GNUTLS_LOG (2, log_level, "Deallocating x509 credentials"); | |
562 | fn_gnutls_certificate_free_credentials (XPROCESS (proc)->gnutls_x509_cred); | |
563 | XPROCESS (proc)->gnutls_x509_cred = NULL; | |
564 | } | |
565 | ||
566 | if (XPROCESS (proc)->gnutls_anon_cred) | |
567 | { | |
568 | GNUTLS_LOG (2, log_level, "Deallocating anon credentials"); | |
569 | fn_gnutls_anon_free_client_credentials (XPROCESS (proc)->gnutls_anon_cred); | |
570 | XPROCESS (proc)->gnutls_anon_cred = NULL; | |
571 | } | |
572 | ||
435c1d67 | 573 | if (XPROCESS (proc)->gnutls_state) |
9c6c6f49 CY |
574 | { |
575 | fn_gnutls_deinit (XPROCESS (proc)->gnutls_state); | |
435c1d67 CY |
576 | XPROCESS (proc)->gnutls_state = NULL; |
577 | if (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_INIT) | |
578 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT - 1; | |
9c6c6f49 CY |
579 | } |
580 | ||
581 | XPROCESS (proc)->gnutls_p = 0; | |
582 | return Qt; | |
583 | } | |
584 | ||
8af55556 | 585 | DEFUN ("gnutls-get-initstage", Fgnutls_get_initstage, Sgnutls_get_initstage, 1, 1, 0, |
74f1829d | 586 | doc: /* Return the GnuTLS init stage of process PROC. |
8af55556 | 587 | See also `gnutls-boot'. */) |
74f1829d | 588 | (Lisp_Object proc) |
8af55556 TZ |
589 | { |
590 | CHECK_PROCESS (proc); | |
591 | ||
592 | return make_number (GNUTLS_INITSTAGE (proc)); | |
593 | } | |
594 | ||
595 | DEFUN ("gnutls-errorp", Fgnutls_errorp, Sgnutls_errorp, 1, 1, 0, | |
74f1829d JB |
596 | doc: /* Return t if ERROR indicates a GnuTLS problem. |
597 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
598 | usage: (gnutls-errorp ERROR) */) | |
599 | (Lisp_Object err) | |
8af55556 | 600 | { |
74f1829d | 601 | if (EQ (err, Qt)) return Qnil; |
8af55556 TZ |
602 | |
603 | return Qt; | |
604 | } | |
605 | ||
606 | DEFUN ("gnutls-error-fatalp", Fgnutls_error_fatalp, Sgnutls_error_fatalp, 1, 1, 0, | |
74f1829d JB |
607 | doc: /* Check if ERROR is fatal. |
608 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
609 | usage: (gnutls-error-fatalp ERROR) */) | |
610 | (Lisp_Object err) | |
8af55556 TZ |
611 | { |
612 | Lisp_Object code; | |
613 | ||
614 | if (EQ (err, Qt)) return Qnil; | |
615 | ||
616 | if (SYMBOLP (err)) | |
8af55556 | 617 | { |
e6059fa2 LMI |
618 | code = Fget (err, Qgnutls_code); |
619 | if (NUMBERP (code)) | |
620 | { | |
621 | err = code; | |
622 | } | |
623 | else | |
624 | { | |
625 | error ("Symbol has no numeric gnutls-code property"); | |
626 | } | |
8af55556 | 627 | } |
8af55556 | 628 | |
d311d28c | 629 | if (! TYPE_RANGED_INTEGERP (int, err)) |
8af55556 TZ |
630 | error ("Not an error symbol or code"); |
631 | ||
0898ca10 | 632 | if (0 == fn_gnutls_error_is_fatal (XINT (err))) |
8af55556 TZ |
633 | return Qnil; |
634 | ||
635 | return Qt; | |
636 | } | |
637 | ||
638 | DEFUN ("gnutls-error-string", Fgnutls_error_string, Sgnutls_error_string, 1, 1, 0, | |
74f1829d JB |
639 | doc: /* Return a description of ERROR. |
640 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
641 | usage: (gnutls-error-string ERROR) */) | |
642 | (Lisp_Object err) | |
8af55556 TZ |
643 | { |
644 | Lisp_Object code; | |
645 | ||
646 | if (EQ (err, Qt)) return build_string ("Not an error"); | |
647 | ||
648 | if (SYMBOLP (err)) | |
8af55556 | 649 | { |
e6059fa2 LMI |
650 | code = Fget (err, Qgnutls_code); |
651 | if (NUMBERP (code)) | |
652 | { | |
653 | err = code; | |
654 | } | |
655 | else | |
656 | { | |
657 | return build_string ("Symbol has no numeric gnutls-code property"); | |
658 | } | |
8af55556 | 659 | } |
8af55556 | 660 | |
d311d28c | 661 | if (! TYPE_RANGED_INTEGERP (int, err)) |
8af55556 TZ |
662 | return build_string ("Not an error symbol or code"); |
663 | ||
0898ca10 | 664 | return build_string (fn_gnutls_strerror (XINT (err))); |
8af55556 TZ |
665 | } |
666 | ||
667 | DEFUN ("gnutls-deinit", Fgnutls_deinit, Sgnutls_deinit, 1, 1, 0, | |
e1b69165 | 668 | doc: /* Deallocate GnuTLS resources associated with process PROC. |
8af55556 | 669 | See also `gnutls-init'. */) |
74f1829d | 670 | (Lisp_Object proc) |
8af55556 | 671 | { |
9c6c6f49 | 672 | return emacs_gnutls_deinit (proc); |
8af55556 TZ |
673 | } |
674 | ||
0898ca10 JB |
675 | DEFUN ("gnutls-available-p", Fgnutls_available_p, Sgnutls_available_p, 0, 0, 0, |
676 | doc: /* Return t if GnuTLS is available in this instance of Emacs. */) | |
677 | (void) | |
678 | { | |
679 | #ifdef WINDOWSNT | |
680 | Lisp_Object found = Fassq (Qgnutls_dll, Vlibrary_cache); | |
681 | if (CONSP (found)) | |
682 | return XCDR (found); | |
683 | else | |
684 | { | |
685 | Lisp_Object status; | |
d07ff9db | 686 | status = init_gnutls_functions () ? Qt : Qnil; |
0898ca10 JB |
687 | Vlibrary_cache = Fcons (Fcons (Qgnutls_dll, status), Vlibrary_cache); |
688 | return status; | |
689 | } | |
690 | #else | |
691 | return Qt; | |
692 | #endif | |
693 | } | |
694 | ||
695 | ||
e1b69165 JB |
696 | /* Initializes global GnuTLS state to defaults. |
697 | Call `gnutls-global-deinit' when GnuTLS usage is no longer needed. | |
8af55556 | 698 | Returns zero on success. */ |
74f1829d | 699 | static Lisp_Object |
e061a11b | 700 | emacs_gnutls_global_init (void) |
8af55556 TZ |
701 | { |
702 | int ret = GNUTLS_E_SUCCESS; | |
703 | ||
e061a11b | 704 | if (!gnutls_global_initialized) |
9cf9f756 PE |
705 | { |
706 | fn_gnutls_global_set_mem_functions (xmalloc, xmalloc, NULL, | |
707 | xrealloc, xfree); | |
708 | ret = fn_gnutls_global_init (); | |
709 | } | |
e061a11b | 710 | gnutls_global_initialized = 1; |
8af55556 TZ |
711 | |
712 | return gnutls_make_error (ret); | |
713 | } | |
714 | ||
ec8df744 | 715 | #if 0 |
e1b69165 | 716 | /* Deinitializes global GnuTLS state. |
8af55556 | 717 | See also `gnutls-global-init'. */ |
74f1829d | 718 | static Lisp_Object |
e061a11b | 719 | emacs_gnutls_global_deinit (void) |
8af55556 | 720 | { |
e061a11b | 721 | if (gnutls_global_initialized) |
8af55556 TZ |
722 | gnutls_global_deinit (); |
723 | ||
e061a11b | 724 | gnutls_global_initialized = 0; |
8af55556 TZ |
725 | |
726 | return gnutls_make_error (GNUTLS_E_SUCCESS); | |
727 | } | |
ec8df744 | 728 | #endif |
8af55556 | 729 | |
c1ae068b LMI |
730 | DEFUN ("gnutls-boot", Fgnutls_boot, Sgnutls_boot, 3, 3, 0, |
731 | doc: /* Initialize GnuTLS client for process PROC with TYPE+PROPLIST. | |
435c1d67 | 732 | Currently only client mode is supported. Return a success/failure |
8af55556 TZ |
733 | value you can check with `gnutls-errorp'. |
734 | ||
c1ae068b LMI |
735 | TYPE is a symbol, either `gnutls-anon' or `gnutls-x509pki'. |
736 | PROPLIST is a property list with the following keys: | |
737 | ||
e061a11b TZ |
738 | :hostname is a string naming the remote host. |
739 | ||
c1ae068b | 740 | :priority is a GnuTLS priority string, defaults to "NORMAL". |
e061a11b | 741 | |
c1ae068b | 742 | :trustfiles is a list of PEM-encoded trust files for `gnutls-x509pki'. |
e061a11b | 743 | |
ff4de4aa TZ |
744 | :crlfiles is a list of PEM-encoded CRL lists for `gnutls-x509pki'. |
745 | ||
746 | :keylist is an alist of PEM-encoded key files and PEM-encoded | |
747 | certificates for `gnutls-x509pki'. | |
e061a11b TZ |
748 | |
749 | :callbacks is an alist of callback functions, see below. | |
750 | ||
c1ae068b | 751 | :loglevel is the debug level requested from GnuTLS, try 4. |
8ed70bf3 | 752 | |
e061a11b TZ |
753 | :verify-flags is a bitset as per GnuTLS' |
754 | gnutls_certificate_set_verify_flags. | |
755 | ||
e061a11b TZ |
756 | :verify-hostname-error, if non-nil, makes a hostname mismatch an |
757 | error. Otherwise it will be just a warning. | |
758 | ||
87e86684 LM |
759 | :min-prime-bits is the minimum accepted number of bits the client will |
760 | accept in Diffie-Hellman key exchange. | |
761 | ||
c1ae068b LMI |
762 | The debug level will be set for this process AND globally for GnuTLS. |
763 | So if you set it higher or lower at any point, it affects global | |
764 | debugging. | |
8af55556 TZ |
765 | |
766 | Note that the priority is set on the client. The server does not use | |
767 | the protocols's priority except for disabling protocols that were not | |
768 | specified. | |
769 | ||
74f1829d | 770 | Processes must be initialized with this function before other GnuTLS |
8af55556 TZ |
771 | functions are used. This function allocates resources which can only |
772 | be deallocated by calling `gnutls-deinit' or by calling it again. | |
773 | ||
e061a11b TZ |
774 | The callbacks alist can have a `verify' key, associated with a |
775 | verification function (UNUSED). | |
776 | ||
8af55556 | 777 | Each authentication type may need additional information in order to |
c1ae068b LMI |
778 | work. For X.509 PKI (`gnutls-x509pki'), you probably need at least |
779 | one trustfile (usually a CA bundle). */) | |
780 | (Lisp_Object proc, Lisp_Object type, Lisp_Object proplist) | |
8af55556 TZ |
781 | { |
782 | int ret = GNUTLS_E_SUCCESS; | |
8ed70bf3 LMI |
783 | int max_log_level = 0; |
784 | ||
8af55556 | 785 | gnutls_session_t state; |
435c1d67 CY |
786 | gnutls_certificate_credentials_t x509_cred = NULL; |
787 | gnutls_anon_client_credentials_t anon_cred = NULL; | |
8af55556 | 788 | Lisp_Object global_init; |
ec8df744 | 789 | char const *priority_string_ptr = "NORMAL"; /* default priority string. */ |
7754e151 | 790 | unsigned int peer_verification; |
e061a11b | 791 | char* c_hostname; |
c1ae068b LMI |
792 | |
793 | /* Placeholders for the property list elements. */ | |
794 | Lisp_Object priority_string; | |
795 | Lisp_Object trustfiles; | |
ff4de4aa TZ |
796 | Lisp_Object crlfiles; |
797 | Lisp_Object keylist; | |
ec8df744 | 798 | /* Lisp_Object callbacks; */ |
c1ae068b | 799 | Lisp_Object loglevel; |
e061a11b | 800 | Lisp_Object hostname; |
8d4c3955 | 801 | /* Lisp_Object verify_error; */ |
e061a11b | 802 | Lisp_Object verify_hostname_error; |
87e86684 | 803 | Lisp_Object prime_bits; |
8af55556 TZ |
804 | |
805 | CHECK_PROCESS (proc); | |
806 | CHECK_SYMBOL (type); | |
c1ae068b LMI |
807 | CHECK_LIST (proplist); |
808 | ||
0898ca10 | 809 | if (NILP (Fgnutls_available_p ())) |
91f2d272 | 810 | error ("GnuTLS not available"); |
0898ca10 | 811 | |
435c1d67 | 812 | if (!EQ (type, Qgnutls_x509pki) && !EQ (type, Qgnutls_anon)) |
91f2d272 | 813 | error ("Invalid GnuTLS credential type"); |
435c1d67 | 814 | |
a3720aa2 AS |
815 | hostname = Fplist_get (proplist, QCgnutls_bootprop_hostname); |
816 | priority_string = Fplist_get (proplist, QCgnutls_bootprop_priority); | |
817 | trustfiles = Fplist_get (proplist, QCgnutls_bootprop_trustfiles); | |
818 | keylist = Fplist_get (proplist, QCgnutls_bootprop_keylist); | |
819 | crlfiles = Fplist_get (proplist, QCgnutls_bootprop_crlfiles); | |
a3720aa2 | 820 | loglevel = Fplist_get (proplist, QCgnutls_bootprop_loglevel); |
a3720aa2 AS |
821 | verify_hostname_error = Fplist_get (proplist, QCgnutls_bootprop_verify_hostname_error); |
822 | prime_bits = Fplist_get (proplist, QCgnutls_bootprop_min_prime_bits); | |
e061a11b TZ |
823 | |
824 | if (!STRINGP (hostname)) | |
825 | error ("gnutls-boot: invalid :hostname parameter"); | |
e061a11b | 826 | c_hostname = SSDATA (hostname); |
8af55556 TZ |
827 | |
828 | state = XPROCESS (proc)->gnutls_state; | |
829 | ||
d311d28c | 830 | if (TYPE_RANGED_INTEGERP (int, loglevel)) |
8ed70bf3 | 831 | { |
0898ca10 | 832 | fn_gnutls_global_set_log_function (gnutls_log_function); |
e1f9f9e3 TZ |
833 | #ifdef HAVE_GNUTLS3 |
834 | fn_gnutls_global_set_audit_log_function (gnutls_audit_log_function); | |
835 | #endif | |
0898ca10 | 836 | fn_gnutls_global_set_log_level (XINT (loglevel)); |
8ed70bf3 LMI |
837 | max_log_level = XINT (loglevel); |
838 | XPROCESS (proc)->gnutls_log_level = max_log_level; | |
839 | } | |
df7fcaff | 840 | |
8af55556 | 841 | /* always initialize globals. */ |
e061a11b | 842 | global_init = emacs_gnutls_global_init (); |
8af55556 TZ |
843 | if (! NILP (Fgnutls_errorp (global_init))) |
844 | return global_init; | |
845 | ||
9c6c6f49 CY |
846 | /* Before allocating new credentials, deallocate any credentials |
847 | that PROC might already have. */ | |
848 | emacs_gnutls_deinit (proc); | |
8af55556 | 849 | |
9c6c6f49 | 850 | /* Mark PROC as a GnuTLS process. */ |
435c1d67 | 851 | XPROCESS (proc)->gnutls_state = NULL; |
9c6c6f49 CY |
852 | XPROCESS (proc)->gnutls_x509_cred = NULL; |
853 | XPROCESS (proc)->gnutls_anon_cred = NULL; | |
6a09a33b | 854 | pset_gnutls_cred_type (XPROCESS (proc), type); |
8af55556 TZ |
855 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_EMPTY; |
856 | ||
8ed70bf3 | 857 | GNUTLS_LOG (1, max_log_level, "allocating credentials"); |
8af55556 | 858 | if (EQ (type, Qgnutls_x509pki)) |
e6059fa2 | 859 | { |
435c1d67 CY |
860 | Lisp_Object verify_flags; |
861 | unsigned int gnutls_verify_flags = GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT; | |
862 | ||
8ed70bf3 | 863 | GNUTLS_LOG (2, max_log_level, "allocating x509 credentials"); |
9cf9f756 | 864 | fn_gnutls_certificate_allocate_credentials (&x509_cred); |
435c1d67 | 865 | XPROCESS (proc)->gnutls_x509_cred = x509_cred; |
e061a11b | 866 | |
435c1d67 | 867 | verify_flags = Fplist_get (proplist, QCgnutls_bootprop_verify_flags); |
e061a11b | 868 | if (NUMBERP (verify_flags)) |
b5f03016 AS |
869 | { |
870 | gnutls_verify_flags = XINT (verify_flags); | |
871 | GNUTLS_LOG (2, max_log_level, "setting verification flags"); | |
872 | } | |
e061a11b | 873 | else if (NILP (verify_flags)) |
435c1d67 | 874 | GNUTLS_LOG (2, max_log_level, "using default verification flags"); |
e061a11b | 875 | else |
435c1d67 CY |
876 | GNUTLS_LOG (2, max_log_level, "ignoring invalid verify-flags"); |
877 | ||
0898ca10 | 878 | fn_gnutls_certificate_set_verify_flags (x509_cred, gnutls_verify_flags); |
e6059fa2 | 879 | } |
435c1d67 | 880 | else /* Qgnutls_anon: */ |
e6059fa2 | 881 | { |
8ed70bf3 | 882 | GNUTLS_LOG (2, max_log_level, "allocating anon credentials"); |
9cf9f756 | 883 | fn_gnutls_anon_allocate_client_credentials (&anon_cred); |
435c1d67 | 884 | XPROCESS (proc)->gnutls_anon_cred = anon_cred; |
e6059fa2 | 885 | } |
8af55556 TZ |
886 | |
887 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_ALLOC; | |
888 | ||
8af55556 | 889 | if (EQ (type, Qgnutls_x509pki)) |
e6059fa2 | 890 | { |
435c1d67 CY |
891 | /* TODO: GNUTLS_X509_FMT_DER is also an option. */ |
892 | int file_format = GNUTLS_X509_FMT_PEM; | |
893 | Lisp_Object tail; | |
894 | ||
7d7bbefd | 895 | for (tail = trustfiles; CONSP (tail); tail = XCDR (tail)) |
e6059fa2 | 896 | { |
34348bd4 | 897 | Lisp_Object trustfile = XCAR (tail); |
b5f03016 AS |
898 | if (STRINGP (trustfile)) |
899 | { | |
900 | GNUTLS_LOG2 (1, max_log_level, "setting the trustfile: ", | |
901 | SSDATA (trustfile)); | |
902 | ret = fn_gnutls_certificate_set_x509_trust_file | |
903 | (x509_cred, | |
904 | SSDATA (trustfile), | |
905 | file_format); | |
906 | ||
907 | if (ret < GNUTLS_E_SUCCESS) | |
908 | return gnutls_make_error (ret); | |
909 | } | |
910 | else | |
911 | { | |
435c1d67 CY |
912 | emacs_gnutls_deinit (proc); |
913 | error ("Invalid trustfile"); | |
b5f03016 AS |
914 | } |
915 | } | |
8af55556 | 916 | |
7d7bbefd | 917 | for (tail = crlfiles; CONSP (tail); tail = XCDR (tail)) |
e6059fa2 | 918 | { |
34348bd4 | 919 | Lisp_Object crlfile = XCAR (tail); |
b5f03016 AS |
920 | if (STRINGP (crlfile)) |
921 | { | |
922 | GNUTLS_LOG2 (1, max_log_level, "setting the CRL file: ", | |
923 | SSDATA (crlfile)); | |
924 | ret = fn_gnutls_certificate_set_x509_crl_file | |
435c1d67 | 925 | (x509_cred, SSDATA (crlfile), file_format); |
b5f03016 AS |
926 | |
927 | if (ret < GNUTLS_E_SUCCESS) | |
928 | return gnutls_make_error (ret); | |
929 | } | |
930 | else | |
931 | { | |
435c1d67 CY |
932 | emacs_gnutls_deinit (proc); |
933 | error ("Invalid CRL file"); | |
b5f03016 AS |
934 | } |
935 | } | |
ff4de4aa | 936 | |
7d7bbefd | 937 | for (tail = keylist; CONSP (tail); tail = XCDR (tail)) |
ff4de4aa | 938 | { |
34348bd4 | 939 | Lisp_Object keyfile = Fcar (XCAR (tail)); |
d96a1e0c | 940 | Lisp_Object certfile = Fcar (Fcdr (XCAR (tail))); |
b5f03016 AS |
941 | if (STRINGP (keyfile) && STRINGP (certfile)) |
942 | { | |
943 | GNUTLS_LOG2 (1, max_log_level, "setting the client key file: ", | |
944 | SSDATA (keyfile)); | |
945 | GNUTLS_LOG2 (1, max_log_level, "setting the client cert file: ", | |
946 | SSDATA (certfile)); | |
947 | ret = fn_gnutls_certificate_set_x509_key_file | |
435c1d67 | 948 | (x509_cred, SSDATA (certfile), SSDATA (keyfile), file_format); |
b5f03016 AS |
949 | |
950 | if (ret < GNUTLS_E_SUCCESS) | |
951 | return gnutls_make_error (ret); | |
952 | } | |
953 | else | |
954 | { | |
435c1d67 CY |
955 | emacs_gnutls_deinit (proc); |
956 | error (STRINGP (keyfile) ? "Invalid client cert file" | |
957 | : "Invalid client key file"); | |
b5f03016 AS |
958 | } |
959 | } | |
e6059fa2 | 960 | } |
8af55556 TZ |
961 | |
962 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_FILES; | |
e061a11b | 963 | GNUTLS_LOG (1, max_log_level, "gnutls callbacks"); |
e061a11b TZ |
964 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CALLBACKS; |
965 | ||
435c1d67 | 966 | /* Call gnutls_init here: */ |
e061a11b | 967 | |
8ed70bf3 | 968 | GNUTLS_LOG (1, max_log_level, "gnutls_init"); |
0898ca10 | 969 | ret = fn_gnutls_init (&state, GNUTLS_CLIENT); |
435c1d67 | 970 | XPROCESS (proc)->gnutls_state = state; |
8af55556 | 971 | if (ret < GNUTLS_E_SUCCESS) |
e6059fa2 | 972 | return gnutls_make_error (ret); |
8af55556 TZ |
973 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT; |
974 | ||
c1ae068b LMI |
975 | if (STRINGP (priority_string)) |
976 | { | |
51b59d79 | 977 | priority_string_ptr = SSDATA (priority_string); |
c1ae068b | 978 | GNUTLS_LOG2 (1, max_log_level, "got non-default priority string:", |
b5f03016 | 979 | priority_string_ptr); |
c1ae068b LMI |
980 | } |
981 | else | |
982 | { | |
983 | GNUTLS_LOG2 (1, max_log_level, "using default priority string:", | |
b5f03016 | 984 | priority_string_ptr); |
c1ae068b | 985 | } |
51b59d79 | 986 | |
8ed70bf3 | 987 | GNUTLS_LOG (1, max_log_level, "setting the priority string"); |
0898ca10 | 988 | ret = fn_gnutls_priority_set_direct (state, |
b5f03016 AS |
989 | priority_string_ptr, |
990 | NULL); | |
8af55556 | 991 | if (ret < GNUTLS_E_SUCCESS) |
e6059fa2 | 992 | return gnutls_make_error (ret); |
8af55556 TZ |
993 | |
994 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_PRIORITY; | |
995 | ||
435c1d67 CY |
996 | if (INTEGERP (prime_bits)) |
997 | fn_gnutls_dh_set_prime_bits (state, XUINT (prime_bits)); | |
8af55556 | 998 | |
435c1d67 CY |
999 | ret = EQ (type, Qgnutls_x509pki) |
1000 | ? fn_gnutls_credentials_set (state, GNUTLS_CRD_CERTIFICATE, x509_cred) | |
1001 | : fn_gnutls_credentials_set (state, GNUTLS_CRD_ANON, anon_cred); | |
8af55556 | 1002 | if (ret < GNUTLS_E_SUCCESS) |
e6059fa2 | 1003 | return gnutls_make_error (ret); |
8af55556 | 1004 | |
8af55556 | 1005 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_SET; |
e061a11b | 1006 | ret = emacs_gnutls_handshake (XPROCESS (proc)); |
e061a11b TZ |
1007 | if (ret < GNUTLS_E_SUCCESS) |
1008 | return gnutls_make_error (ret); | |
1009 | ||
1010 | /* Now verify the peer, following | |
1011 | http://www.gnu.org/software/gnutls/manual/html_node/Verifying-peer_0027s-certificate.html. | |
1012 | The peer should present at least one certificate in the chain; do a | |
1013 | check of the certificate's hostname with | |
1014 | gnutls_x509_crt_check_hostname() against :hostname. */ | |
1015 | ||
0898ca10 | 1016 | ret = fn_gnutls_certificate_verify_peers2 (state, &peer_verification); |
e061a11b TZ |
1017 | if (ret < GNUTLS_E_SUCCESS) |
1018 | return gnutls_make_error (ret); | |
671875da | 1019 | |
e061a11b | 1020 | if (XINT (loglevel) > 0 && peer_verification & GNUTLS_CERT_INVALID) |
435c1d67 CY |
1021 | message ("%s certificate could not be verified.", c_hostname); |
1022 | ||
1023 | if (peer_verification & GNUTLS_CERT_REVOKED) | |
1024 | GNUTLS_LOG2 (1, max_log_level, "certificate was revoked (CRL):", | |
1025 | c_hostname); | |
1026 | ||
1027 | if (peer_verification & GNUTLS_CERT_SIGNER_NOT_FOUND) | |
1028 | GNUTLS_LOG2 (1, max_log_level, "certificate signer was not found:", | |
1029 | c_hostname); | |
1030 | ||
1031 | if (peer_verification & GNUTLS_CERT_SIGNER_NOT_CA) | |
1032 | GNUTLS_LOG2 (1, max_log_level, "certificate signer is not a CA:", | |
1033 | c_hostname); | |
1034 | ||
1035 | if (peer_verification & GNUTLS_CERT_INSECURE_ALGORITHM) | |
1036 | GNUTLS_LOG2 (1, max_log_level, | |
1037 | "certificate was signed with an insecure algorithm:", | |
1038 | c_hostname); | |
1039 | ||
1040 | if (peer_verification & GNUTLS_CERT_NOT_ACTIVATED) | |
1041 | GNUTLS_LOG2 (1, max_log_level, "certificate is not yet activated:", | |
1042 | c_hostname); | |
1043 | ||
1044 | if (peer_verification & GNUTLS_CERT_EXPIRED) | |
1045 | GNUTLS_LOG2 (1, max_log_level, "certificate has expired:", | |
1046 | c_hostname); | |
1047 | ||
1048 | if (peer_verification != 0) | |
1049 | { | |
1050 | if (NILP (verify_hostname_error)) | |
1051 | GNUTLS_LOG2 (1, max_log_level, "certificate validation failed:", | |
1052 | c_hostname); | |
1053 | else | |
1054 | { | |
1055 | emacs_gnutls_deinit (proc); | |
1056 | error ("Certificate validation failed %s, verification code %d", | |
1057 | c_hostname, peer_verification); | |
1058 | } | |
1059 | } | |
e061a11b TZ |
1060 | |
1061 | /* Up to here the process is the same for X.509 certificates and | |
1062 | OpenPGP keys. From now on X.509 certificates are assumed. This | |
1063 | can be easily extended to work with openpgp keys as well. */ | |
0898ca10 | 1064 | if (fn_gnutls_certificate_type_get (state) == GNUTLS_CRT_X509) |
e061a11b | 1065 | { |
435c1d67 CY |
1066 | gnutls_x509_crt_t gnutls_verify_cert; |
1067 | const gnutls_datum_t *gnutls_verify_cert_list; | |
1068 | unsigned int gnutls_verify_cert_list_size; | |
e061a11b | 1069 | |
435c1d67 | 1070 | ret = fn_gnutls_x509_crt_init (&gnutls_verify_cert); |
e061a11b | 1071 | if (ret < GNUTLS_E_SUCCESS) |
b5f03016 | 1072 | return gnutls_make_error (ret); |
e061a11b | 1073 | |
671875da | 1074 | gnutls_verify_cert_list = |
b5f03016 | 1075 | fn_gnutls_certificate_get_peers (state, &gnutls_verify_cert_list_size); |
e061a11b | 1076 | |
435c1d67 | 1077 | if (gnutls_verify_cert_list == NULL) |
b5f03016 | 1078 | { |
435c1d67 CY |
1079 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); |
1080 | emacs_gnutls_deinit (proc); | |
1081 | error ("No x509 certificate was found\n"); | |
b5f03016 | 1082 | } |
e061a11b TZ |
1083 | |
1084 | /* We only check the first certificate in the given chain. */ | |
0898ca10 | 1085 | ret = fn_gnutls_x509_crt_import (gnutls_verify_cert, |
b5f03016 AS |
1086 | &gnutls_verify_cert_list[0], |
1087 | GNUTLS_X509_FMT_DER); | |
e061a11b TZ |
1088 | |
1089 | if (ret < GNUTLS_E_SUCCESS) | |
b5f03016 AS |
1090 | { |
1091 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); | |
1092 | return gnutls_make_error (ret); | |
1093 | } | |
e061a11b | 1094 | |
0898ca10 | 1095 | if (!fn_gnutls_x509_crt_check_hostname (gnutls_verify_cert, c_hostname)) |
b5f03016 AS |
1096 | { |
1097 | if (NILP (verify_hostname_error)) | |
435c1d67 CY |
1098 | GNUTLS_LOG2 (1, max_log_level, "x509 certificate does not match:", |
1099 | c_hostname); | |
b5f03016 AS |
1100 | else |
1101 | { | |
1102 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); | |
435c1d67 CY |
1103 | emacs_gnutls_deinit (proc); |
1104 | error ("The x509 certificate does not match \"%s\"", c_hostname); | |
b5f03016 AS |
1105 | } |
1106 | } | |
0898ca10 | 1107 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); |
e061a11b TZ |
1108 | } |
1109 | ||
69369809 | 1110 | /* Set this flag only if the whole initialization succeeded. */ |
194b4d9f TZ |
1111 | XPROCESS (proc)->gnutls_p = 1; |
1112 | ||
e061a11b | 1113 | return gnutls_make_error (ret); |
8af55556 TZ |
1114 | } |
1115 | ||
1116 | DEFUN ("gnutls-bye", Fgnutls_bye, | |
1117 | Sgnutls_bye, 2, 2, 0, | |
74f1829d | 1118 | doc: /* Terminate current GnuTLS connection for process PROC. |
8af55556 TZ |
1119 | The connection should have been initiated using `gnutls-handshake'. |
1120 | ||
1121 | If CONT is not nil the TLS connection gets terminated and further | |
74f1829d | 1122 | receives and sends will be disallowed. If the return value is zero you |
8af55556 TZ |
1123 | may continue using the connection. If CONT is nil, GnuTLS actually |
1124 | sends an alert containing a close request and waits for the peer to | |
1125 | reply with the same message. In order to reuse the connection you | |
1126 | should wait for an EOF from the peer. | |
1127 | ||
1128 | This function may also return `gnutls-e-again', or | |
1129 | `gnutls-e-interrupted'. */) | |
1130 | (Lisp_Object proc, Lisp_Object cont) | |
1131 | { | |
1132 | gnutls_session_t state; | |
1133 | int ret; | |
1134 | ||
1135 | CHECK_PROCESS (proc); | |
1136 | ||
1137 | state = XPROCESS (proc)->gnutls_state; | |
1138 | ||
0898ca10 | 1139 | ret = fn_gnutls_bye (state, |
b5f03016 | 1140 | NILP (cont) ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR); |
8af55556 TZ |
1141 | |
1142 | return gnutls_make_error (ret); | |
1143 | } | |
1144 | ||
8af55556 TZ |
1145 | void |
1146 | syms_of_gnutls (void) | |
1147 | { | |
e061a11b TZ |
1148 | gnutls_global_initialized = 0; |
1149 | ||
a555cb87 | 1150 | DEFSYM (Qgnutls_dll, "gnutls"); |
a555cb87 JB |
1151 | DEFSYM (Qgnutls_code, "gnutls-code"); |
1152 | DEFSYM (Qgnutls_anon, "gnutls-anon"); | |
1153 | DEFSYM (Qgnutls_x509pki, "gnutls-x509pki"); | |
a3720aa2 AS |
1154 | DEFSYM (QCgnutls_bootprop_hostname, ":hostname"); |
1155 | DEFSYM (QCgnutls_bootprop_priority, ":priority"); | |
1156 | DEFSYM (QCgnutls_bootprop_trustfiles, ":trustfiles"); | |
1157 | DEFSYM (QCgnutls_bootprop_keylist, ":keylist"); | |
1158 | DEFSYM (QCgnutls_bootprop_crlfiles, ":crlfiles"); | |
1159 | DEFSYM (QCgnutls_bootprop_callbacks, ":callbacks"); | |
1160 | DEFSYM (QCgnutls_bootprop_callbacks_verify, "verify"); | |
1161 | DEFSYM (QCgnutls_bootprop_min_prime_bits, ":min-prime-bits"); | |
1162 | DEFSYM (QCgnutls_bootprop_loglevel, ":loglevel"); | |
1163 | DEFSYM (QCgnutls_bootprop_verify_flags, ":verify-flags"); | |
1164 | DEFSYM (QCgnutls_bootprop_verify_hostname_error, ":verify-hostname-error"); | |
a555cb87 JB |
1165 | |
1166 | DEFSYM (Qgnutls_e_interrupted, "gnutls-e-interrupted"); | |
8af55556 | 1167 | Fput (Qgnutls_e_interrupted, Qgnutls_code, |
b5f03016 | 1168 | make_number (GNUTLS_E_INTERRUPTED)); |
8af55556 | 1169 | |
a555cb87 | 1170 | DEFSYM (Qgnutls_e_again, "gnutls-e-again"); |
8af55556 | 1171 | Fput (Qgnutls_e_again, Qgnutls_code, |
b5f03016 | 1172 | make_number (GNUTLS_E_AGAIN)); |
8af55556 | 1173 | |
a555cb87 | 1174 | DEFSYM (Qgnutls_e_invalid_session, "gnutls-e-invalid-session"); |
8af55556 | 1175 | Fput (Qgnutls_e_invalid_session, Qgnutls_code, |
b5f03016 | 1176 | make_number (GNUTLS_E_INVALID_SESSION)); |
8af55556 | 1177 | |
a555cb87 | 1178 | DEFSYM (Qgnutls_e_not_ready_for_handshake, "gnutls-e-not-ready-for-handshake"); |
8af55556 | 1179 | Fput (Qgnutls_e_not_ready_for_handshake, Qgnutls_code, |
b5f03016 | 1180 | make_number (GNUTLS_E_APPLICATION_ERROR_MIN)); |
8af55556 TZ |
1181 | |
1182 | defsubr (&Sgnutls_get_initstage); | |
1183 | defsubr (&Sgnutls_errorp); | |
1184 | defsubr (&Sgnutls_error_fatalp); | |
1185 | defsubr (&Sgnutls_error_string); | |
1186 | defsubr (&Sgnutls_boot); | |
1187 | defsubr (&Sgnutls_deinit); | |
8af55556 | 1188 | defsubr (&Sgnutls_bye); |
0898ca10 | 1189 | defsubr (&Sgnutls_available_p); |
750c33f7 | 1190 | |
925a6be7 | 1191 | DEFVAR_INT ("gnutls-log-level", global_gnutls_log_level, |
31fd3586 GM |
1192 | doc: /* Logging level used by the GnuTLS functions. |
1193 | Set this larger than 0 to get debug output in the *Messages* buffer. | |
1194 | 1 is for important messages, 2 is for debug data, and higher numbers | |
1195 | are as per the GnuTLS logging conventions. */); | |
925a6be7 | 1196 | global_gnutls_log_level = 0; |
8af55556 | 1197 | } |
bafcf6a5 JB |
1198 | |
1199 | #endif /* HAVE_GNUTLS */ |