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8af55556 | 1 | /* GnuTLS glue for GNU Emacs. |
ba318903 | 2 | Copyright (C) 2010-2014 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" | |
9ab69568 | 24 | #include "coding.h" |
8af55556 TZ |
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 | ||
18e27ea8 | 34 | static bool emacs_gnutls_handle_error (gnutls_session_t, int); |
e061a11b | 35 | |
0898ca10 | 36 | static Lisp_Object Qgnutls_dll; |
bafcf6a5 JB |
37 | static Lisp_Object Qgnutls_code; |
38 | static Lisp_Object Qgnutls_anon, Qgnutls_x509pki; | |
39 | static Lisp_Object Qgnutls_e_interrupted, Qgnutls_e_again, | |
8af55556 | 40 | Qgnutls_e_invalid_session, Qgnutls_e_not_ready_for_handshake; |
18e27ea8 | 41 | static bool gnutls_global_initialized; |
8af55556 | 42 | |
c1ae068b | 43 | /* The following are for the property list of `gnutls-boot'. */ |
a3720aa2 AS |
44 | static Lisp_Object QCgnutls_bootprop_priority; |
45 | static Lisp_Object QCgnutls_bootprop_trustfiles; | |
46 | static Lisp_Object QCgnutls_bootprop_keylist; | |
47 | static Lisp_Object QCgnutls_bootprop_crlfiles; | |
48 | static Lisp_Object QCgnutls_bootprop_callbacks; | |
49 | static Lisp_Object QCgnutls_bootprop_loglevel; | |
50 | static Lisp_Object QCgnutls_bootprop_hostname; | |
51 | static Lisp_Object QCgnutls_bootprop_min_prime_bits; | |
52 | static Lisp_Object QCgnutls_bootprop_verify_flags; | |
31b4827e | 53 | static Lisp_Object QCgnutls_bootprop_verify_error; |
e061a11b TZ |
54 | |
55 | /* Callback keys for `gnutls-boot'. Unused currently. */ | |
a3720aa2 | 56 | static Lisp_Object QCgnutls_bootprop_callbacks_verify; |
c1ae068b | 57 | |
0898ca10 | 58 | static void gnutls_log_function (int, const char *); |
faa52174 | 59 | static void gnutls_log_function2 (int, const char *, const char *); |
8e2d7ef2 JD |
60 | #ifdef HAVE_GNUTLS3 |
61 | static void gnutls_audit_log_function (gnutls_session_t, const char *); | |
62 | #endif | |
0898ca10 JB |
63 | |
64 | \f | |
65 | #ifdef WINDOWSNT | |
66 | ||
67 | /* Macro for defining functions that will be loaded from the GnuTLS DLL. */ | |
dbdb9a7c | 68 | #define DEF_GNUTLS_FN(rettype,func,args) static rettype (FAR CDECL *fn_##func)args |
0898ca10 JB |
69 | |
70 | /* Macro for loading GnuTLS functions from the library. */ | |
71 | #define LOAD_GNUTLS_FN(lib,func) { \ | |
72 | fn_##func = (void *) GetProcAddress (lib, #func); \ | |
73 | if (!fn_##func) return 0; \ | |
74 | } | |
75 | ||
76 | DEF_GNUTLS_FN (gnutls_alert_description_t, gnutls_alert_get, | |
b5f03016 | 77 | (gnutls_session_t)); |
0898ca10 | 78 | DEF_GNUTLS_FN (const char *, gnutls_alert_get_name, |
b5f03016 | 79 | (gnutls_alert_description_t)); |
0898ca10 JB |
80 | DEF_GNUTLS_FN (int, gnutls_alert_send_appropriate, (gnutls_session_t, int)); |
81 | DEF_GNUTLS_FN (int, gnutls_anon_allocate_client_credentials, | |
b5f03016 | 82 | (gnutls_anon_client_credentials_t *)); |
0898ca10 | 83 | DEF_GNUTLS_FN (void, gnutls_anon_free_client_credentials, |
b5f03016 | 84 | (gnutls_anon_client_credentials_t)); |
0898ca10 JB |
85 | DEF_GNUTLS_FN (int, gnutls_bye, (gnutls_session_t, gnutls_close_request_t)); |
86 | DEF_GNUTLS_FN (int, gnutls_certificate_allocate_credentials, | |
b5f03016 | 87 | (gnutls_certificate_credentials_t *)); |
0898ca10 | 88 | DEF_GNUTLS_FN (void, gnutls_certificate_free_credentials, |
b5f03016 | 89 | (gnutls_certificate_credentials_t)); |
0898ca10 | 90 | DEF_GNUTLS_FN (const gnutls_datum_t *, gnutls_certificate_get_peers, |
b5f03016 | 91 | (gnutls_session_t, unsigned int *)); |
0898ca10 | 92 | DEF_GNUTLS_FN (void, gnutls_certificate_set_verify_flags, |
b5f03016 | 93 | (gnutls_certificate_credentials_t, unsigned int)); |
0898ca10 | 94 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_crl_file, |
b5f03016 AS |
95 | (gnutls_certificate_credentials_t, const char *, |
96 | gnutls_x509_crt_fmt_t)); | |
0898ca10 | 97 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_key_file, |
b5f03016 AS |
98 | (gnutls_certificate_credentials_t, const char *, const char *, |
99 | gnutls_x509_crt_fmt_t)); | |
0898ca10 | 100 | DEF_GNUTLS_FN (int, gnutls_certificate_set_x509_trust_file, |
b5f03016 AS |
101 | (gnutls_certificate_credentials_t, const char *, |
102 | gnutls_x509_crt_fmt_t)); | |
0898ca10 | 103 | DEF_GNUTLS_FN (gnutls_certificate_type_t, gnutls_certificate_type_get, |
b5f03016 | 104 | (gnutls_session_t)); |
0898ca10 | 105 | DEF_GNUTLS_FN (int, gnutls_certificate_verify_peers2, |
b5f03016 | 106 | (gnutls_session_t, unsigned int *)); |
0898ca10 | 107 | DEF_GNUTLS_FN (int, gnutls_credentials_set, |
b5f03016 | 108 | (gnutls_session_t, gnutls_credentials_type_t, void *)); |
0898ca10 | 109 | DEF_GNUTLS_FN (void, gnutls_deinit, (gnutls_session_t)); |
87e86684 | 110 | DEF_GNUTLS_FN (void, gnutls_dh_set_prime_bits, |
b5f03016 | 111 | (gnutls_session_t, unsigned int)); |
0898ca10 JB |
112 | DEF_GNUTLS_FN (int, gnutls_error_is_fatal, (int)); |
113 | DEF_GNUTLS_FN (int, gnutls_global_init, (void)); | |
114 | DEF_GNUTLS_FN (void, gnutls_global_set_log_function, (gnutls_log_func)); | |
e1f9f9e3 TZ |
115 | #ifdef HAVE_GNUTLS3 |
116 | DEF_GNUTLS_FN (void, gnutls_global_set_audit_log_function, (gnutls_audit_log_func)); | |
117 | #endif | |
0898ca10 | 118 | DEF_GNUTLS_FN (void, gnutls_global_set_log_level, (int)); |
9cf9f756 PE |
119 | DEF_GNUTLS_FN (void, gnutls_global_set_mem_functions, |
120 | (gnutls_alloc_function, gnutls_alloc_function, | |
121 | gnutls_is_secure_function, gnutls_realloc_function, | |
122 | gnutls_free_function)); | |
0898ca10 JB |
123 | DEF_GNUTLS_FN (int, gnutls_handshake, (gnutls_session_t)); |
124 | DEF_GNUTLS_FN (int, gnutls_init, (gnutls_session_t *, gnutls_connection_end_t)); | |
125 | DEF_GNUTLS_FN (int, gnutls_priority_set_direct, | |
b5f03016 | 126 | (gnutls_session_t, const char *, const char **)); |
0898ca10 JB |
127 | DEF_GNUTLS_FN (size_t, gnutls_record_check_pending, (gnutls_session_t)); |
128 | DEF_GNUTLS_FN (ssize_t, gnutls_record_recv, (gnutls_session_t, void *, size_t)); | |
129 | DEF_GNUTLS_FN (ssize_t, gnutls_record_send, | |
b5f03016 | 130 | (gnutls_session_t, const void *, size_t)); |
0898ca10 JB |
131 | DEF_GNUTLS_FN (const char *, gnutls_strerror, (int)); |
132 | DEF_GNUTLS_FN (void, gnutls_transport_set_errno, (gnutls_session_t, int)); | |
651e947e | 133 | DEF_GNUTLS_FN (const char *, gnutls_check_version, (const char *)); |
0898ca10 JB |
134 | DEF_GNUTLS_FN (void, gnutls_transport_set_lowat, (gnutls_session_t, int)); |
135 | DEF_GNUTLS_FN (void, gnutls_transport_set_ptr2, | |
b5f03016 AS |
136 | (gnutls_session_t, gnutls_transport_ptr_t, |
137 | gnutls_transport_ptr_t)); | |
0898ca10 | 138 | DEF_GNUTLS_FN (void, gnutls_transport_set_pull_function, |
b5f03016 | 139 | (gnutls_session_t, gnutls_pull_func)); |
0898ca10 | 140 | DEF_GNUTLS_FN (void, gnutls_transport_set_push_function, |
b5f03016 | 141 | (gnutls_session_t, gnutls_push_func)); |
0898ca10 | 142 | DEF_GNUTLS_FN (int, gnutls_x509_crt_check_hostname, |
b5f03016 | 143 | (gnutls_x509_crt_t, const char *)); |
0898ca10 JB |
144 | DEF_GNUTLS_FN (void, gnutls_x509_crt_deinit, (gnutls_x509_crt_t)); |
145 | DEF_GNUTLS_FN (int, gnutls_x509_crt_import, | |
b5f03016 AS |
146 | (gnutls_x509_crt_t, const gnutls_datum_t *, |
147 | gnutls_x509_crt_fmt_t)); | |
0898ca10 JB |
148 | DEF_GNUTLS_FN (int, gnutls_x509_crt_init, (gnutls_x509_crt_t *)); |
149 | ||
18e27ea8 | 150 | static bool |
d07ff9db | 151 | init_gnutls_functions (void) |
0898ca10 JB |
152 | { |
153 | HMODULE library; | |
ac389d0c | 154 | int max_log_level = 1; |
0898ca10 | 155 | |
d07ff9db | 156 | if (!(library = w32_delayed_load (Qgnutls_dll))) |
0898ca10 | 157 | { |
ac389d0c | 158 | GNUTLS_LOG (1, max_log_level, "GnuTLS library not found"); |
0898ca10 JB |
159 | return 0; |
160 | } | |
161 | ||
162 | LOAD_GNUTLS_FN (library, gnutls_alert_get); | |
163 | LOAD_GNUTLS_FN (library, gnutls_alert_get_name); | |
164 | LOAD_GNUTLS_FN (library, gnutls_alert_send_appropriate); | |
165 | LOAD_GNUTLS_FN (library, gnutls_anon_allocate_client_credentials); | |
166 | LOAD_GNUTLS_FN (library, gnutls_anon_free_client_credentials); | |
167 | LOAD_GNUTLS_FN (library, gnutls_bye); | |
168 | LOAD_GNUTLS_FN (library, gnutls_certificate_allocate_credentials); | |
169 | LOAD_GNUTLS_FN (library, gnutls_certificate_free_credentials); | |
170 | LOAD_GNUTLS_FN (library, gnutls_certificate_get_peers); | |
171 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_verify_flags); | |
172 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_crl_file); | |
173 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_key_file); | |
174 | LOAD_GNUTLS_FN (library, gnutls_certificate_set_x509_trust_file); | |
175 | LOAD_GNUTLS_FN (library, gnutls_certificate_type_get); | |
176 | LOAD_GNUTLS_FN (library, gnutls_certificate_verify_peers2); | |
177 | LOAD_GNUTLS_FN (library, gnutls_credentials_set); | |
178 | LOAD_GNUTLS_FN (library, gnutls_deinit); | |
87e86684 | 179 | LOAD_GNUTLS_FN (library, gnutls_dh_set_prime_bits); |
0898ca10 JB |
180 | LOAD_GNUTLS_FN (library, gnutls_error_is_fatal); |
181 | LOAD_GNUTLS_FN (library, gnutls_global_init); | |
182 | LOAD_GNUTLS_FN (library, gnutls_global_set_log_function); | |
e1f9f9e3 TZ |
183 | #ifdef HAVE_GNUTLS3 |
184 | LOAD_GNUTLS_FN (library, gnutls_global_set_audit_log_function); | |
185 | #endif | |
0898ca10 | 186 | LOAD_GNUTLS_FN (library, gnutls_global_set_log_level); |
9cf9f756 | 187 | LOAD_GNUTLS_FN (library, gnutls_global_set_mem_functions); |
0898ca10 JB |
188 | LOAD_GNUTLS_FN (library, gnutls_handshake); |
189 | LOAD_GNUTLS_FN (library, gnutls_init); | |
190 | LOAD_GNUTLS_FN (library, gnutls_priority_set_direct); | |
191 | LOAD_GNUTLS_FN (library, gnutls_record_check_pending); | |
192 | LOAD_GNUTLS_FN (library, gnutls_record_recv); | |
193 | LOAD_GNUTLS_FN (library, gnutls_record_send); | |
194 | LOAD_GNUTLS_FN (library, gnutls_strerror); | |
195 | LOAD_GNUTLS_FN (library, gnutls_transport_set_errno); | |
651e947e EZ |
196 | LOAD_GNUTLS_FN (library, gnutls_check_version); |
197 | /* We don't need to call gnutls_transport_set_lowat in GnuTLS 2.11.1 | |
198 | and later, and the function was removed entirely in 3.0.0. */ | |
199 | if (!fn_gnutls_check_version ("2.11.1")) | |
200 | LOAD_GNUTLS_FN (library, gnutls_transport_set_lowat); | |
0898ca10 JB |
201 | LOAD_GNUTLS_FN (library, gnutls_transport_set_ptr2); |
202 | LOAD_GNUTLS_FN (library, gnutls_transport_set_pull_function); | |
203 | LOAD_GNUTLS_FN (library, gnutls_transport_set_push_function); | |
204 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_check_hostname); | |
205 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_deinit); | |
206 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_import); | |
207 | LOAD_GNUTLS_FN (library, gnutls_x509_crt_init); | |
208 | ||
925a6be7 | 209 | max_log_level = global_gnutls_log_level; |
ac389d0c | 210 | |
d69621cc JB |
211 | { |
212 | Lisp_Object name = CAR_SAFE (Fget (Qgnutls_dll, QCloaded_from)); | |
213 | GNUTLS_LOG2 (1, max_log_level, "GnuTLS library loaded:", | |
214 | STRINGP (name) ? (const char *) SDATA (name) : "unknown"); | |
215 | } | |
216 | ||
0898ca10 JB |
217 | return 1; |
218 | } | |
219 | ||
220 | #else /* !WINDOWSNT */ | |
221 | ||
222 | #define fn_gnutls_alert_get gnutls_alert_get | |
223 | #define fn_gnutls_alert_get_name gnutls_alert_get_name | |
224 | #define fn_gnutls_alert_send_appropriate gnutls_alert_send_appropriate | |
225 | #define fn_gnutls_anon_allocate_client_credentials gnutls_anon_allocate_client_credentials | |
226 | #define fn_gnutls_anon_free_client_credentials gnutls_anon_free_client_credentials | |
227 | #define fn_gnutls_bye gnutls_bye | |
228 | #define fn_gnutls_certificate_allocate_credentials gnutls_certificate_allocate_credentials | |
229 | #define fn_gnutls_certificate_free_credentials gnutls_certificate_free_credentials | |
230 | #define fn_gnutls_certificate_get_peers gnutls_certificate_get_peers | |
231 | #define fn_gnutls_certificate_set_verify_flags gnutls_certificate_set_verify_flags | |
232 | #define fn_gnutls_certificate_set_x509_crl_file gnutls_certificate_set_x509_crl_file | |
639c109b | 233 | #define fn_gnutls_certificate_set_x509_key_file gnutls_certificate_set_x509_key_file |
520cf78a | 234 | #define fn_gnutls_certificate_set_x509_trust_file gnutls_certificate_set_x509_trust_file |
0898ca10 JB |
235 | #define fn_gnutls_certificate_type_get gnutls_certificate_type_get |
236 | #define fn_gnutls_certificate_verify_peers2 gnutls_certificate_verify_peers2 | |
237 | #define fn_gnutls_credentials_set gnutls_credentials_set | |
238 | #define fn_gnutls_deinit gnutls_deinit | |
87e86684 | 239 | #define fn_gnutls_dh_set_prime_bits gnutls_dh_set_prime_bits |
0898ca10 JB |
240 | #define fn_gnutls_error_is_fatal gnutls_error_is_fatal |
241 | #define fn_gnutls_global_init gnutls_global_init | |
242 | #define fn_gnutls_global_set_log_function gnutls_global_set_log_function | |
e1f9f9e3 TZ |
243 | #ifdef HAVE_GNUTLS3 |
244 | #define fn_gnutls_global_set_audit_log_function gnutls_global_set_audit_log_function | |
245 | #endif | |
0898ca10 | 246 | #define fn_gnutls_global_set_log_level gnutls_global_set_log_level |
9cf9f756 | 247 | #define fn_gnutls_global_set_mem_functions gnutls_global_set_mem_functions |
0898ca10 JB |
248 | #define fn_gnutls_handshake gnutls_handshake |
249 | #define fn_gnutls_init gnutls_init | |
250 | #define fn_gnutls_priority_set_direct gnutls_priority_set_direct | |
251 | #define fn_gnutls_record_check_pending gnutls_record_check_pending | |
252 | #define fn_gnutls_record_recv gnutls_record_recv | |
253 | #define fn_gnutls_record_send gnutls_record_send | |
254 | #define fn_gnutls_strerror gnutls_strerror | |
3d798ba7 | 255 | #ifdef WINDOWSNT |
0898ca10 | 256 | #define fn_gnutls_transport_set_errno gnutls_transport_set_errno |
3d798ba7 | 257 | #endif |
0898ca10 | 258 | #define fn_gnutls_transport_set_ptr2 gnutls_transport_set_ptr2 |
0898ca10 JB |
259 | #define fn_gnutls_x509_crt_check_hostname gnutls_x509_crt_check_hostname |
260 | #define fn_gnutls_x509_crt_deinit gnutls_x509_crt_deinit | |
261 | #define fn_gnutls_x509_crt_import gnutls_x509_crt_import | |
262 | #define fn_gnutls_x509_crt_init gnutls_x509_crt_init | |
263 | ||
264 | #endif /* !WINDOWSNT */ | |
265 | ||
266 | \f | |
8e2d7ef2 | 267 | #ifdef HAVE_GNUTLS3 |
e1f9f9e3 TZ |
268 | /* Function to log a simple audit message. */ |
269 | static void | |
faa52174 | 270 | gnutls_audit_log_function (gnutls_session_t session, const char *string) |
e1f9f9e3 TZ |
271 | { |
272 | if (global_gnutls_log_level >= 1) | |
273 | { | |
274 | message ("gnutls.c: [audit] %s", string); | |
275 | } | |
276 | } | |
8e2d7ef2 | 277 | #endif |
e1f9f9e3 | 278 | |
a18ecafa | 279 | /* Function to log a simple message. */ |
74f1829d | 280 | static void |
faa52174 | 281 | gnutls_log_function (int level, const char *string) |
e061a11b TZ |
282 | { |
283 | message ("gnutls.c: [%d] %s", level, string); | |
284 | } | |
285 | ||
a18ecafa | 286 | /* Function to log a message and a string. */ |
e061a11b | 287 | static void |
faa52174 | 288 | gnutls_log_function2 (int level, const char *string, const char *extra) |
e061a11b TZ |
289 | { |
290 | message ("gnutls.c: [%d] %s %s", level, string, extra); | |
291 | } | |
292 | ||
a18ecafa TZ |
293 | /* Function to log a message and an integer. */ |
294 | static void | |
faa52174 | 295 | gnutls_log_function2i (int level, const char *string, int extra) |
a18ecafa TZ |
296 | { |
297 | message ("gnutls.c: [%d] %s %d", level, string, extra); | |
298 | } | |
299 | ||
e061a11b | 300 | static int |
bac5cef8 LMI |
301 | emacs_gnutls_handshake (struct Lisp_Process *proc) |
302 | { | |
303 | gnutls_session_t state = proc->gnutls_state; | |
304 | int ret; | |
305 | ||
306 | if (proc->gnutls_initstage < GNUTLS_STAGE_HANDSHAKE_CANDO) | |
6a7a1b0b | 307 | return -1; |
bac5cef8 LMI |
308 | |
309 | if (proc->gnutls_initstage < GNUTLS_STAGE_TRANSPORT_POINTERS_SET) | |
e6059fa2 | 310 | { |
e061a11b TZ |
311 | #ifdef WINDOWSNT |
312 | /* On W32 we cannot transfer socket handles between different runtime | |
b5f03016 AS |
313 | libraries, so we tell GnuTLS to use our special push/pull |
314 | functions. */ | |
0898ca10 | 315 | fn_gnutls_transport_set_ptr2 (state, |
b5f03016 AS |
316 | (gnutls_transport_ptr_t) proc, |
317 | (gnutls_transport_ptr_t) proc); | |
0898ca10 JB |
318 | fn_gnutls_transport_set_push_function (state, &emacs_gnutls_push); |
319 | fn_gnutls_transport_set_pull_function (state, &emacs_gnutls_pull); | |
e061a11b TZ |
320 | |
321 | /* For non blocking sockets or other custom made pull/push | |
b5f03016 AS |
322 | functions the gnutls_transport_set_lowat must be called, with |
323 | a zero low water mark value. (GnuTLS 2.10.4 documentation) | |
e061a11b | 324 | |
b5f03016 AS |
325 | (Note: this is probably not strictly necessary as the lowat |
326 | value is only used when no custom pull/push functions are | |
327 | set.) */ | |
651e947e EZ |
328 | /* According to GnuTLS NEWS file, lowat level has been set to |
329 | zero by default in version 2.11.1, and the function | |
330 | gnutls_transport_set_lowat was removed from the library in | |
331 | version 2.99.0. */ | |
332 | if (!fn_gnutls_check_version ("2.11.1")) | |
333 | fn_gnutls_transport_set_lowat (state, 0); | |
e061a11b | 334 | #else |
c1ae068b | 335 | /* This is how GnuTLS takes sockets: as file descriptors passed |
b5f03016 AS |
336 | in. For an Emacs process socket, infd and outfd are the |
337 | same but we use this two-argument version for clarity. */ | |
0898ca10 | 338 | fn_gnutls_transport_set_ptr2 (state, |
b5f03016 AS |
339 | (gnutls_transport_ptr_t) (long) proc->infd, |
340 | (gnutls_transport_ptr_t) (long) proc->outfd); | |
e061a11b | 341 | #endif |
bac5cef8 | 342 | |
e6059fa2 LMI |
343 | proc->gnutls_initstage = GNUTLS_STAGE_TRANSPORT_POINTERS_SET; |
344 | } | |
bac5cef8 | 345 | |
e061a11b TZ |
346 | do |
347 | { | |
0898ca10 | 348 | ret = fn_gnutls_handshake (state); |
e061a11b | 349 | emacs_gnutls_handle_error (state, ret); |
57570cd3 | 350 | QUIT; |
e061a11b | 351 | } |
0898ca10 | 352 | while (ret < 0 && fn_gnutls_error_is_fatal (ret) == 0); |
e061a11b | 353 | |
bac5cef8 LMI |
354 | proc->gnutls_initstage = GNUTLS_STAGE_HANDSHAKE_TRIED; |
355 | ||
356 | if (ret == GNUTLS_E_SUCCESS) | |
e6059fa2 | 357 | { |
e061a11b | 358 | /* Here we're finally done. */ |
e6059fa2 LMI |
359 | proc->gnutls_initstage = GNUTLS_STAGE_READY; |
360 | } | |
e061a11b TZ |
361 | else |
362 | { | |
0898ca10 | 363 | fn_gnutls_alert_send_appropriate (state, ret); |
e061a11b TZ |
364 | } |
365 | return ret; | |
bac5cef8 LMI |
366 | } |
367 | ||
11dde529 | 368 | ptrdiff_t |
0898ca10 JB |
369 | emacs_gnutls_record_check_pending (gnutls_session_t state) |
370 | { | |
371 | return fn_gnutls_record_check_pending (state); | |
372 | } | |
373 | ||
3d798ba7 | 374 | #ifdef WINDOWSNT |
0898ca10 JB |
375 | void |
376 | emacs_gnutls_transport_set_errno (gnutls_session_t state, int err) | |
377 | { | |
378 | fn_gnutls_transport_set_errno (state, err); | |
379 | } | |
3d798ba7 | 380 | #endif |
0898ca10 | 381 | |
d311d28c PE |
382 | ptrdiff_t |
383 | emacs_gnutls_write (struct Lisp_Process *proc, const char *buf, ptrdiff_t nbyte) | |
8af55556 | 384 | { |
c8926152 | 385 | ssize_t rtnval = 0; |
d311d28c | 386 | ptrdiff_t bytes_written; |
df7fcaff LMI |
387 | gnutls_session_t state = proc->gnutls_state; |
388 | ||
0ca43699 AS |
389 | if (proc->gnutls_initstage != GNUTLS_STAGE_READY) |
390 | { | |
0ca43699 | 391 | errno = EAGAIN; |
0ca43699 AS |
392 | return 0; |
393 | } | |
8af55556 TZ |
394 | |
395 | bytes_written = 0; | |
396 | ||
397 | while (nbyte > 0) | |
398 | { | |
0898ca10 | 399 | rtnval = fn_gnutls_record_send (state, buf, nbyte); |
8af55556 | 400 | |
2e6c74c5 | 401 | if (rtnval < 0) |
b5f03016 | 402 | { |
77abcbc2 | 403 | if (rtnval == GNUTLS_E_INTERRUPTED) |
b5f03016 AS |
404 | continue; |
405 | else | |
0ca43699 AS |
406 | { |
407 | /* If we get GNUTLS_E_AGAIN, then set errno | |
408 | appropriately so that send_process retries the | |
409 | correct way instead of erroring out. */ | |
410 | if (rtnval == GNUTLS_E_AGAIN) | |
22626a85 | 411 | errno = EAGAIN; |
0ca43699 | 412 | break; |
2e8f3c56 | 413 | } |
b5f03016 | 414 | } |
8af55556 TZ |
415 | |
416 | buf += rtnval; | |
417 | nbyte -= rtnval; | |
418 | bytes_written += rtnval; | |
419 | } | |
8af55556 | 420 | |
e061a11b | 421 | emacs_gnutls_handle_error (state, rtnval); |
8af55556 TZ |
422 | return (bytes_written); |
423 | } | |
424 | ||
d311d28c PE |
425 | ptrdiff_t |
426 | emacs_gnutls_read (struct Lisp_Process *proc, char *buf, ptrdiff_t nbyte) | |
8af55556 | 427 | { |
368f4090 | 428 | ssize_t rtnval; |
df7fcaff LMI |
429 | gnutls_session_t state = proc->gnutls_state; |
430 | ||
a18ecafa TZ |
431 | int log_level = proc->gnutls_log_level; |
432 | ||
e6059fa2 LMI |
433 | if (proc->gnutls_initstage != GNUTLS_STAGE_READY) |
434 | { | |
a18ecafa TZ |
435 | /* If the handshake count is under the limit, try the handshake |
436 | again and increment the handshake count. This count is kept | |
437 | per process (connection), not globally. */ | |
438 | if (proc->gnutls_handshakes_tried < GNUTLS_EMACS_HANDSHAKES_LIMIT) | |
439 | { | |
440 | proc->gnutls_handshakes_tried++; | |
441 | emacs_gnutls_handshake (proc); | |
02fd101b | 442 | GNUTLS_LOG2i (5, log_level, "Retried handshake", |
a18ecafa TZ |
443 | proc->gnutls_handshakes_tried); |
444 | return -1; | |
445 | } | |
446 | ||
447 | GNUTLS_LOG (2, log_level, "Giving up on handshake; resetting retries"); | |
448 | proc->gnutls_handshakes_tried = 0; | |
449 | return 0; | |
e6059fa2 | 450 | } |
0898ca10 | 451 | rtnval = fn_gnutls_record_recv (state, buf, nbyte); |
ec9f09be LMI |
452 | if (rtnval >= 0) |
453 | return rtnval; | |
dbf38e02 LMI |
454 | else if (rtnval == GNUTLS_E_UNEXPECTED_PACKET_LENGTH) |
455 | /* The peer closed the connection. */ | |
456 | return 0; | |
18e27ea8 | 457 | else if (emacs_gnutls_handle_error (state, rtnval)) |
e061a11b TZ |
458 | /* non-fatal error */ |
459 | return -1; | |
4b2d9ec2 | 460 | else { |
9173deec | 461 | /* a fatal error occurred */ |
e061a11b | 462 | return 0; |
4b2d9ec2 | 463 | } |
8af55556 TZ |
464 | } |
465 | ||
18e27ea8 PE |
466 | /* Report a GnuTLS error to the user. |
467 | Return true if the error code was successfully handled. */ | |
468 | static bool | |
e061a11b TZ |
469 | emacs_gnutls_handle_error (gnutls_session_t session, int err) |
470 | { | |
e061a11b TZ |
471 | int max_log_level = 0; |
472 | ||
18e27ea8 | 473 | bool ret; |
e061a11b TZ |
474 | const char *str; |
475 | ||
476 | /* TODO: use a Lisp_Object generated by gnutls_make_error? */ | |
477 | if (err >= 0) | |
18e27ea8 | 478 | return 1; |
e061a11b | 479 | |
925a6be7 | 480 | max_log_level = global_gnutls_log_level; |
e061a11b TZ |
481 | |
482 | /* TODO: use gnutls-error-fatalp and gnutls-error-string. */ | |
483 | ||
0898ca10 | 484 | str = fn_gnutls_strerror (err); |
e061a11b TZ |
485 | if (!str) |
486 | str = "unknown"; | |
487 | ||
0898ca10 | 488 | if (fn_gnutls_error_is_fatal (err)) |
e061a11b | 489 | { |
18e27ea8 | 490 | ret = 0; |
e061a11b TZ |
491 | GNUTLS_LOG2 (0, max_log_level, "fatal error:", str); |
492 | } | |
493 | else | |
494 | { | |
18e27ea8 | 495 | ret = 1; |
194b4d9f TZ |
496 | |
497 | switch (err) | |
498 | { | |
499 | case GNUTLS_E_AGAIN: | |
500 | GNUTLS_LOG2 (3, | |
501 | max_log_level, | |
502 | "retry:", | |
503 | str); | |
504 | default: | |
505 | GNUTLS_LOG2 (1, | |
506 | max_log_level, | |
507 | "non-fatal error:", | |
508 | str); | |
509 | } | |
e061a11b TZ |
510 | } |
511 | ||
512 | if (err == GNUTLS_E_WARNING_ALERT_RECEIVED | |
513 | || err == GNUTLS_E_FATAL_ALERT_RECEIVED) | |
514 | { | |
0898ca10 | 515 | int alert = fn_gnutls_alert_get (session); |
e061a11b | 516 | int level = (err == GNUTLS_E_FATAL_ALERT_RECEIVED) ? 0 : 1; |
0898ca10 | 517 | str = fn_gnutls_alert_get_name (alert); |
e061a11b TZ |
518 | if (!str) |
519 | str = "unknown"; | |
520 | ||
521 | GNUTLS_LOG2 (level, max_log_level, "Received alert: ", str); | |
522 | } | |
523 | return ret; | |
524 | } | |
525 | ||
8af55556 TZ |
526 | /* convert an integer error to a Lisp_Object; it will be either a |
527 | known symbol like `gnutls_e_interrupted' and `gnutls_e_again' or | |
528 | simply the integer value of the error. GNUTLS_E_SUCCESS is mapped | |
529 | to Qt. */ | |
74f1829d | 530 | static Lisp_Object |
ec8df744 | 531 | gnutls_make_error (int err) |
8af55556 | 532 | { |
ec8df744 | 533 | switch (err) |
e6059fa2 LMI |
534 | { |
535 | case GNUTLS_E_SUCCESS: | |
536 | return Qt; | |
537 | case GNUTLS_E_AGAIN: | |
538 | return Qgnutls_e_again; | |
539 | case GNUTLS_E_INTERRUPTED: | |
540 | return Qgnutls_e_interrupted; | |
541 | case GNUTLS_E_INVALID_SESSION: | |
542 | return Qgnutls_e_invalid_session; | |
543 | } | |
8af55556 | 544 | |
ec8df744 | 545 | return make_number (err); |
8af55556 TZ |
546 | } |
547 | ||
9c6c6f49 CY |
548 | Lisp_Object |
549 | emacs_gnutls_deinit (Lisp_Object proc) | |
550 | { | |
551 | int log_level; | |
552 | ||
553 | CHECK_PROCESS (proc); | |
554 | ||
555 | if (XPROCESS (proc)->gnutls_p == 0) | |
556 | return Qnil; | |
557 | ||
558 | log_level = XPROCESS (proc)->gnutls_log_level; | |
559 | ||
560 | if (XPROCESS (proc)->gnutls_x509_cred) | |
561 | { | |
562 | GNUTLS_LOG (2, log_level, "Deallocating x509 credentials"); | |
563 | fn_gnutls_certificate_free_credentials (XPROCESS (proc)->gnutls_x509_cred); | |
564 | XPROCESS (proc)->gnutls_x509_cred = NULL; | |
565 | } | |
566 | ||
567 | if (XPROCESS (proc)->gnutls_anon_cred) | |
568 | { | |
569 | GNUTLS_LOG (2, log_level, "Deallocating anon credentials"); | |
570 | fn_gnutls_anon_free_client_credentials (XPROCESS (proc)->gnutls_anon_cred); | |
571 | XPROCESS (proc)->gnutls_anon_cred = NULL; | |
572 | } | |
573 | ||
435c1d67 | 574 | if (XPROCESS (proc)->gnutls_state) |
9c6c6f49 CY |
575 | { |
576 | fn_gnutls_deinit (XPROCESS (proc)->gnutls_state); | |
435c1d67 CY |
577 | XPROCESS (proc)->gnutls_state = NULL; |
578 | if (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_INIT) | |
579 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT - 1; | |
9c6c6f49 CY |
580 | } |
581 | ||
582 | XPROCESS (proc)->gnutls_p = 0; | |
583 | return Qt; | |
584 | } | |
585 | ||
8af55556 | 586 | DEFUN ("gnutls-get-initstage", Fgnutls_get_initstage, Sgnutls_get_initstage, 1, 1, 0, |
74f1829d | 587 | doc: /* Return the GnuTLS init stage of process PROC. |
8af55556 | 588 | See also `gnutls-boot'. */) |
74f1829d | 589 | (Lisp_Object proc) |
8af55556 TZ |
590 | { |
591 | CHECK_PROCESS (proc); | |
592 | ||
593 | return make_number (GNUTLS_INITSTAGE (proc)); | |
594 | } | |
595 | ||
596 | DEFUN ("gnutls-errorp", Fgnutls_errorp, Sgnutls_errorp, 1, 1, 0, | |
74f1829d JB |
597 | doc: /* Return t if ERROR indicates a GnuTLS problem. |
598 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
599 | usage: (gnutls-errorp ERROR) */) | |
600 | (Lisp_Object err) | |
8af55556 | 601 | { |
74f1829d | 602 | if (EQ (err, Qt)) return Qnil; |
8af55556 TZ |
603 | |
604 | return Qt; | |
605 | } | |
606 | ||
607 | DEFUN ("gnutls-error-fatalp", Fgnutls_error_fatalp, Sgnutls_error_fatalp, 1, 1, 0, | |
74f1829d JB |
608 | doc: /* Check if ERROR is fatal. |
609 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
610 | usage: (gnutls-error-fatalp ERROR) */) | |
611 | (Lisp_Object err) | |
8af55556 TZ |
612 | { |
613 | Lisp_Object code; | |
614 | ||
615 | if (EQ (err, Qt)) return Qnil; | |
616 | ||
617 | if (SYMBOLP (err)) | |
8af55556 | 618 | { |
e6059fa2 LMI |
619 | code = Fget (err, Qgnutls_code); |
620 | if (NUMBERP (code)) | |
621 | { | |
622 | err = code; | |
623 | } | |
624 | else | |
625 | { | |
626 | error ("Symbol has no numeric gnutls-code property"); | |
627 | } | |
8af55556 | 628 | } |
8af55556 | 629 | |
d311d28c | 630 | if (! TYPE_RANGED_INTEGERP (int, err)) |
8af55556 TZ |
631 | error ("Not an error symbol or code"); |
632 | ||
0898ca10 | 633 | if (0 == fn_gnutls_error_is_fatal (XINT (err))) |
8af55556 TZ |
634 | return Qnil; |
635 | ||
636 | return Qt; | |
637 | } | |
638 | ||
639 | DEFUN ("gnutls-error-string", Fgnutls_error_string, Sgnutls_error_string, 1, 1, 0, | |
74f1829d JB |
640 | doc: /* Return a description of ERROR. |
641 | ERROR is an integer or a symbol with an integer `gnutls-code' property. | |
642 | usage: (gnutls-error-string ERROR) */) | |
643 | (Lisp_Object err) | |
8af55556 TZ |
644 | { |
645 | Lisp_Object code; | |
646 | ||
647 | if (EQ (err, Qt)) return build_string ("Not an error"); | |
648 | ||
649 | if (SYMBOLP (err)) | |
8af55556 | 650 | { |
e6059fa2 LMI |
651 | code = Fget (err, Qgnutls_code); |
652 | if (NUMBERP (code)) | |
653 | { | |
654 | err = code; | |
655 | } | |
656 | else | |
657 | { | |
658 | return build_string ("Symbol has no numeric gnutls-code property"); | |
659 | } | |
8af55556 | 660 | } |
8af55556 | 661 | |
d311d28c | 662 | if (! TYPE_RANGED_INTEGERP (int, err)) |
8af55556 TZ |
663 | return build_string ("Not an error symbol or code"); |
664 | ||
0898ca10 | 665 | return build_string (fn_gnutls_strerror (XINT (err))); |
8af55556 TZ |
666 | } |
667 | ||
668 | DEFUN ("gnutls-deinit", Fgnutls_deinit, Sgnutls_deinit, 1, 1, 0, | |
e1b69165 | 669 | doc: /* Deallocate GnuTLS resources associated with process PROC. |
8af55556 | 670 | See also `gnutls-init'. */) |
74f1829d | 671 | (Lisp_Object proc) |
8af55556 | 672 | { |
9c6c6f49 | 673 | return emacs_gnutls_deinit (proc); |
8af55556 TZ |
674 | } |
675 | ||
0898ca10 JB |
676 | DEFUN ("gnutls-available-p", Fgnutls_available_p, Sgnutls_available_p, 0, 0, 0, |
677 | doc: /* Return t if GnuTLS is available in this instance of Emacs. */) | |
678 | (void) | |
679 | { | |
680 | #ifdef WINDOWSNT | |
681 | Lisp_Object found = Fassq (Qgnutls_dll, Vlibrary_cache); | |
682 | if (CONSP (found)) | |
683 | return XCDR (found); | |
684 | else | |
685 | { | |
686 | Lisp_Object status; | |
d07ff9db | 687 | status = init_gnutls_functions () ? Qt : Qnil; |
0898ca10 JB |
688 | Vlibrary_cache = Fcons (Fcons (Qgnutls_dll, status), Vlibrary_cache); |
689 | return status; | |
690 | } | |
691 | #else | |
692 | return Qt; | |
693 | #endif | |
694 | } | |
695 | ||
696 | ||
e1b69165 JB |
697 | /* Initializes global GnuTLS state to defaults. |
698 | Call `gnutls-global-deinit' when GnuTLS usage is no longer needed. | |
8af55556 | 699 | Returns zero on success. */ |
74f1829d | 700 | static Lisp_Object |
e061a11b | 701 | emacs_gnutls_global_init (void) |
8af55556 TZ |
702 | { |
703 | int ret = GNUTLS_E_SUCCESS; | |
704 | ||
e061a11b | 705 | if (!gnutls_global_initialized) |
9cf9f756 PE |
706 | { |
707 | fn_gnutls_global_set_mem_functions (xmalloc, xmalloc, NULL, | |
708 | xrealloc, xfree); | |
709 | ret = fn_gnutls_global_init (); | |
710 | } | |
e061a11b | 711 | gnutls_global_initialized = 1; |
8af55556 TZ |
712 | |
713 | return gnutls_make_error (ret); | |
714 | } | |
715 | ||
ec8df744 | 716 | #if 0 |
e1b69165 | 717 | /* Deinitializes global GnuTLS state. |
8af55556 | 718 | See also `gnutls-global-init'. */ |
74f1829d | 719 | static Lisp_Object |
e061a11b | 720 | emacs_gnutls_global_deinit (void) |
8af55556 | 721 | { |
e061a11b | 722 | if (gnutls_global_initialized) |
8af55556 TZ |
723 | gnutls_global_deinit (); |
724 | ||
e061a11b | 725 | gnutls_global_initialized = 0; |
8af55556 TZ |
726 | |
727 | return gnutls_make_error (GNUTLS_E_SUCCESS); | |
728 | } | |
ec8df744 | 729 | #endif |
8af55556 | 730 | |
c1ae068b LMI |
731 | DEFUN ("gnutls-boot", Fgnutls_boot, Sgnutls_boot, 3, 3, 0, |
732 | doc: /* Initialize GnuTLS client for process PROC with TYPE+PROPLIST. | |
435c1d67 | 733 | Currently only client mode is supported. Return a success/failure |
8af55556 TZ |
734 | value you can check with `gnutls-errorp'. |
735 | ||
c1ae068b LMI |
736 | TYPE is a symbol, either `gnutls-anon' or `gnutls-x509pki'. |
737 | PROPLIST is a property list with the following keys: | |
738 | ||
e061a11b TZ |
739 | :hostname is a string naming the remote host. |
740 | ||
c1ae068b | 741 | :priority is a GnuTLS priority string, defaults to "NORMAL". |
e061a11b | 742 | |
c1ae068b | 743 | :trustfiles is a list of PEM-encoded trust files for `gnutls-x509pki'. |
e061a11b | 744 | |
ff4de4aa TZ |
745 | :crlfiles is a list of PEM-encoded CRL lists for `gnutls-x509pki'. |
746 | ||
747 | :keylist is an alist of PEM-encoded key files and PEM-encoded | |
748 | certificates for `gnutls-x509pki'. | |
e061a11b TZ |
749 | |
750 | :callbacks is an alist of callback functions, see below. | |
751 | ||
c1ae068b | 752 | :loglevel is the debug level requested from GnuTLS, try 4. |
8ed70bf3 | 753 | |
e061a11b TZ |
754 | :verify-flags is a bitset as per GnuTLS' |
755 | gnutls_certificate_set_verify_flags. | |
756 | ||
31b4827e TZ |
757 | :verify-hostname-error is ignored. Pass :hostname in :verify-error |
758 | instead. | |
759 | ||
760 | :verify-error is a list of symbols to express verification checks or | |
761 | `t' to do all checks. Currently it can contain `:trustfiles' and | |
762 | `:hostname' to verify the certificate or the hostname respectively. | |
e061a11b | 763 | |
87e86684 LM |
764 | :min-prime-bits is the minimum accepted number of bits the client will |
765 | accept in Diffie-Hellman key exchange. | |
766 | ||
c1ae068b LMI |
767 | The debug level will be set for this process AND globally for GnuTLS. |
768 | So if you set it higher or lower at any point, it affects global | |
769 | debugging. | |
8af55556 TZ |
770 | |
771 | Note that the priority is set on the client. The server does not use | |
772 | the protocols's priority except for disabling protocols that were not | |
773 | specified. | |
774 | ||
74f1829d | 775 | Processes must be initialized with this function before other GnuTLS |
8af55556 TZ |
776 | functions are used. This function allocates resources which can only |
777 | be deallocated by calling `gnutls-deinit' or by calling it again. | |
778 | ||
e061a11b TZ |
779 | The callbacks alist can have a `verify' key, associated with a |
780 | verification function (UNUSED). | |
781 | ||
8af55556 | 782 | Each authentication type may need additional information in order to |
c1ae068b LMI |
783 | work. For X.509 PKI (`gnutls-x509pki'), you probably need at least |
784 | one trustfile (usually a CA bundle). */) | |
785 | (Lisp_Object proc, Lisp_Object type, Lisp_Object proplist) | |
8af55556 TZ |
786 | { |
787 | int ret = GNUTLS_E_SUCCESS; | |
8ed70bf3 | 788 | int max_log_level = 0; |
525d9a3c | 789 | bool verify_error_all = 0; |
8ed70bf3 | 790 | |
8af55556 | 791 | gnutls_session_t state; |
435c1d67 CY |
792 | gnutls_certificate_credentials_t x509_cred = NULL; |
793 | gnutls_anon_client_credentials_t anon_cred = NULL; | |
8af55556 | 794 | Lisp_Object global_init; |
ec8df744 | 795 | char const *priority_string_ptr = "NORMAL"; /* default priority string. */ |
7754e151 | 796 | unsigned int peer_verification; |
faa52174 | 797 | char *c_hostname; |
c1ae068b LMI |
798 | |
799 | /* Placeholders for the property list elements. */ | |
800 | Lisp_Object priority_string; | |
801 | Lisp_Object trustfiles; | |
ff4de4aa TZ |
802 | Lisp_Object crlfiles; |
803 | Lisp_Object keylist; | |
ec8df744 | 804 | /* Lisp_Object callbacks; */ |
c1ae068b | 805 | Lisp_Object loglevel; |
e061a11b | 806 | Lisp_Object hostname; |
31b4827e | 807 | Lisp_Object verify_error; |
87e86684 | 808 | Lisp_Object prime_bits; |
8af55556 TZ |
809 | |
810 | CHECK_PROCESS (proc); | |
811 | CHECK_SYMBOL (type); | |
c1ae068b LMI |
812 | CHECK_LIST (proplist); |
813 | ||
0898ca10 | 814 | if (NILP (Fgnutls_available_p ())) |
91f2d272 | 815 | error ("GnuTLS not available"); |
0898ca10 | 816 | |
435c1d67 | 817 | if (!EQ (type, Qgnutls_x509pki) && !EQ (type, Qgnutls_anon)) |
91f2d272 | 818 | error ("Invalid GnuTLS credential type"); |
435c1d67 | 819 | |
a3720aa2 AS |
820 | hostname = Fplist_get (proplist, QCgnutls_bootprop_hostname); |
821 | priority_string = Fplist_get (proplist, QCgnutls_bootprop_priority); | |
822 | trustfiles = Fplist_get (proplist, QCgnutls_bootprop_trustfiles); | |
823 | keylist = Fplist_get (proplist, QCgnutls_bootprop_keylist); | |
824 | crlfiles = Fplist_get (proplist, QCgnutls_bootprop_crlfiles); | |
a3720aa2 | 825 | loglevel = Fplist_get (proplist, QCgnutls_bootprop_loglevel); |
31b4827e | 826 | verify_error = Fplist_get (proplist, QCgnutls_bootprop_verify_error); |
a3720aa2 | 827 | prime_bits = Fplist_get (proplist, QCgnutls_bootprop_min_prime_bits); |
e061a11b | 828 | |
525d9a3c TZ |
829 | if (EQ (verify_error, Qt)) |
830 | { | |
831 | verify_error_all = 1; | |
832 | } | |
833 | else if (NILP (Flistp (verify_error))) | |
834 | { | |
835 | error ("gnutls-boot: invalid :verify_error parameter (not a list)"); | |
836 | } | |
31b4827e | 837 | |
e061a11b | 838 | if (!STRINGP (hostname)) |
31b4827e | 839 | error ("gnutls-boot: invalid :hostname parameter (not a string)"); |
e061a11b | 840 | c_hostname = SSDATA (hostname); |
8af55556 TZ |
841 | |
842 | state = XPROCESS (proc)->gnutls_state; | |
843 | ||
d311d28c | 844 | if (TYPE_RANGED_INTEGERP (int, loglevel)) |
8ed70bf3 | 845 | { |
0898ca10 | 846 | fn_gnutls_global_set_log_function (gnutls_log_function); |
e1f9f9e3 TZ |
847 | #ifdef HAVE_GNUTLS3 |
848 | fn_gnutls_global_set_audit_log_function (gnutls_audit_log_function); | |
849 | #endif | |
0898ca10 | 850 | fn_gnutls_global_set_log_level (XINT (loglevel)); |
8ed70bf3 LMI |
851 | max_log_level = XINT (loglevel); |
852 | XPROCESS (proc)->gnutls_log_level = max_log_level; | |
853 | } | |
df7fcaff | 854 | |
8af55556 | 855 | /* always initialize globals. */ |
e061a11b | 856 | global_init = emacs_gnutls_global_init (); |
8af55556 TZ |
857 | if (! NILP (Fgnutls_errorp (global_init))) |
858 | return global_init; | |
859 | ||
9c6c6f49 CY |
860 | /* Before allocating new credentials, deallocate any credentials |
861 | that PROC might already have. */ | |
862 | emacs_gnutls_deinit (proc); | |
8af55556 | 863 | |
9c6c6f49 | 864 | /* Mark PROC as a GnuTLS process. */ |
435c1d67 | 865 | XPROCESS (proc)->gnutls_state = NULL; |
9c6c6f49 CY |
866 | XPROCESS (proc)->gnutls_x509_cred = NULL; |
867 | XPROCESS (proc)->gnutls_anon_cred = NULL; | |
6a09a33b | 868 | pset_gnutls_cred_type (XPROCESS (proc), type); |
8af55556 TZ |
869 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_EMPTY; |
870 | ||
8ed70bf3 | 871 | GNUTLS_LOG (1, max_log_level, "allocating credentials"); |
8af55556 | 872 | if (EQ (type, Qgnutls_x509pki)) |
e6059fa2 | 873 | { |
435c1d67 CY |
874 | Lisp_Object verify_flags; |
875 | unsigned int gnutls_verify_flags = GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT; | |
876 | ||
8ed70bf3 | 877 | GNUTLS_LOG (2, max_log_level, "allocating x509 credentials"); |
9cf9f756 | 878 | fn_gnutls_certificate_allocate_credentials (&x509_cred); |
435c1d67 | 879 | XPROCESS (proc)->gnutls_x509_cred = x509_cred; |
e061a11b | 880 | |
435c1d67 | 881 | verify_flags = Fplist_get (proplist, QCgnutls_bootprop_verify_flags); |
e061a11b | 882 | if (NUMBERP (verify_flags)) |
b5f03016 AS |
883 | { |
884 | gnutls_verify_flags = XINT (verify_flags); | |
885 | GNUTLS_LOG (2, max_log_level, "setting verification flags"); | |
886 | } | |
e061a11b | 887 | else if (NILP (verify_flags)) |
435c1d67 | 888 | GNUTLS_LOG (2, max_log_level, "using default verification flags"); |
e061a11b | 889 | else |
435c1d67 CY |
890 | GNUTLS_LOG (2, max_log_level, "ignoring invalid verify-flags"); |
891 | ||
0898ca10 | 892 | fn_gnutls_certificate_set_verify_flags (x509_cred, gnutls_verify_flags); |
e6059fa2 | 893 | } |
435c1d67 | 894 | else /* Qgnutls_anon: */ |
e6059fa2 | 895 | { |
8ed70bf3 | 896 | GNUTLS_LOG (2, max_log_level, "allocating anon credentials"); |
9cf9f756 | 897 | fn_gnutls_anon_allocate_client_credentials (&anon_cred); |
435c1d67 | 898 | XPROCESS (proc)->gnutls_anon_cred = anon_cred; |
e6059fa2 | 899 | } |
8af55556 TZ |
900 | |
901 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_ALLOC; | |
902 | ||
8af55556 | 903 | if (EQ (type, Qgnutls_x509pki)) |
e6059fa2 | 904 | { |
435c1d67 CY |
905 | /* TODO: GNUTLS_X509_FMT_DER is also an option. */ |
906 | int file_format = GNUTLS_X509_FMT_PEM; | |
907 | Lisp_Object tail; | |
908 | ||
7d7bbefd | 909 | for (tail = trustfiles; CONSP (tail); tail = XCDR (tail)) |
e6059fa2 | 910 | { |
34348bd4 | 911 | Lisp_Object trustfile = XCAR (tail); |
b5f03016 AS |
912 | if (STRINGP (trustfile)) |
913 | { | |
914 | GNUTLS_LOG2 (1, max_log_level, "setting the trustfile: ", | |
915 | SSDATA (trustfile)); | |
9ab69568 EZ |
916 | trustfile = ENCODE_FILE (trustfile); |
917 | #ifdef WINDOWSNT | |
918 | /* Since GnuTLS doesn't support UTF-8 or UTF-16 encoded | |
919 | file names on Windows, we need to re-encode the file | |
920 | name using the current ANSI codepage. */ | |
921 | trustfile = ansi_encode_filename (trustfile); | |
922 | #endif | |
b5f03016 AS |
923 | ret = fn_gnutls_certificate_set_x509_trust_file |
924 | (x509_cred, | |
925 | SSDATA (trustfile), | |
926 | file_format); | |
927 | ||
928 | if (ret < GNUTLS_E_SUCCESS) | |
929 | return gnutls_make_error (ret); | |
930 | } | |
931 | else | |
932 | { | |
435c1d67 CY |
933 | emacs_gnutls_deinit (proc); |
934 | error ("Invalid trustfile"); | |
b5f03016 AS |
935 | } |
936 | } | |
8af55556 | 937 | |
7d7bbefd | 938 | for (tail = crlfiles; CONSP (tail); tail = XCDR (tail)) |
e6059fa2 | 939 | { |
34348bd4 | 940 | Lisp_Object crlfile = XCAR (tail); |
b5f03016 AS |
941 | if (STRINGP (crlfile)) |
942 | { | |
943 | GNUTLS_LOG2 (1, max_log_level, "setting the CRL file: ", | |
944 | SSDATA (crlfile)); | |
9ab69568 EZ |
945 | crlfile = ENCODE_FILE (crlfile); |
946 | #ifdef WINDOWSNT | |
947 | crlfile = ansi_encode_filename (crlfile); | |
948 | #endif | |
b5f03016 | 949 | ret = fn_gnutls_certificate_set_x509_crl_file |
435c1d67 | 950 | (x509_cred, SSDATA (crlfile), file_format); |
b5f03016 AS |
951 | |
952 | if (ret < GNUTLS_E_SUCCESS) | |
953 | return gnutls_make_error (ret); | |
954 | } | |
955 | else | |
956 | { | |
435c1d67 CY |
957 | emacs_gnutls_deinit (proc); |
958 | error ("Invalid CRL file"); | |
b5f03016 AS |
959 | } |
960 | } | |
ff4de4aa | 961 | |
7d7bbefd | 962 | for (tail = keylist; CONSP (tail); tail = XCDR (tail)) |
ff4de4aa | 963 | { |
34348bd4 | 964 | Lisp_Object keyfile = Fcar (XCAR (tail)); |
d96a1e0c | 965 | Lisp_Object certfile = Fcar (Fcdr (XCAR (tail))); |
b5f03016 AS |
966 | if (STRINGP (keyfile) && STRINGP (certfile)) |
967 | { | |
968 | GNUTLS_LOG2 (1, max_log_level, "setting the client key file: ", | |
969 | SSDATA (keyfile)); | |
970 | GNUTLS_LOG2 (1, max_log_level, "setting the client cert file: ", | |
971 | SSDATA (certfile)); | |
9ab69568 EZ |
972 | keyfile = ENCODE_FILE (keyfile); |
973 | certfile = ENCODE_FILE (certfile); | |
974 | #ifdef WINDOWSNT | |
975 | keyfile = ansi_encode_filename (keyfile); | |
976 | certfile = ansi_encode_filename (certfile); | |
977 | #endif | |
b5f03016 | 978 | ret = fn_gnutls_certificate_set_x509_key_file |
435c1d67 | 979 | (x509_cred, SSDATA (certfile), SSDATA (keyfile), file_format); |
b5f03016 AS |
980 | |
981 | if (ret < GNUTLS_E_SUCCESS) | |
982 | return gnutls_make_error (ret); | |
983 | } | |
984 | else | |
985 | { | |
435c1d67 CY |
986 | emacs_gnutls_deinit (proc); |
987 | error (STRINGP (keyfile) ? "Invalid client cert file" | |
988 | : "Invalid client key file"); | |
b5f03016 AS |
989 | } |
990 | } | |
e6059fa2 | 991 | } |
8af55556 TZ |
992 | |
993 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_FILES; | |
e061a11b | 994 | GNUTLS_LOG (1, max_log_level, "gnutls callbacks"); |
e061a11b TZ |
995 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CALLBACKS; |
996 | ||
435c1d67 | 997 | /* Call gnutls_init here: */ |
e061a11b | 998 | |
8ed70bf3 | 999 | GNUTLS_LOG (1, max_log_level, "gnutls_init"); |
0898ca10 | 1000 | ret = fn_gnutls_init (&state, GNUTLS_CLIENT); |
435c1d67 | 1001 | XPROCESS (proc)->gnutls_state = state; |
8af55556 | 1002 | if (ret < GNUTLS_E_SUCCESS) |
e6059fa2 | 1003 | return gnutls_make_error (ret); |
8af55556 TZ |
1004 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT; |
1005 | ||
c1ae068b LMI |
1006 | if (STRINGP (priority_string)) |
1007 | { | |
51b59d79 | 1008 | priority_string_ptr = SSDATA (priority_string); |
c1ae068b | 1009 | GNUTLS_LOG2 (1, max_log_level, "got non-default priority string:", |
b5f03016 | 1010 | priority_string_ptr); |
c1ae068b LMI |
1011 | } |
1012 | else | |
1013 | { | |
1014 | GNUTLS_LOG2 (1, max_log_level, "using default priority string:", | |
b5f03016 | 1015 | priority_string_ptr); |
c1ae068b | 1016 | } |
51b59d79 | 1017 | |
8ed70bf3 | 1018 | GNUTLS_LOG (1, max_log_level, "setting the priority string"); |
0898ca10 | 1019 | ret = fn_gnutls_priority_set_direct (state, |
b5f03016 AS |
1020 | priority_string_ptr, |
1021 | NULL); | |
8af55556 | 1022 | if (ret < GNUTLS_E_SUCCESS) |
e6059fa2 | 1023 | return gnutls_make_error (ret); |
8af55556 TZ |
1024 | |
1025 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_PRIORITY; | |
1026 | ||
435c1d67 CY |
1027 | if (INTEGERP (prime_bits)) |
1028 | fn_gnutls_dh_set_prime_bits (state, XUINT (prime_bits)); | |
8af55556 | 1029 | |
435c1d67 CY |
1030 | ret = EQ (type, Qgnutls_x509pki) |
1031 | ? fn_gnutls_credentials_set (state, GNUTLS_CRD_CERTIFICATE, x509_cred) | |
1032 | : fn_gnutls_credentials_set (state, GNUTLS_CRD_ANON, anon_cred); | |
8af55556 | 1033 | if (ret < GNUTLS_E_SUCCESS) |
e6059fa2 | 1034 | return gnutls_make_error (ret); |
8af55556 | 1035 | |
8af55556 | 1036 | GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_SET; |
e061a11b | 1037 | ret = emacs_gnutls_handshake (XPROCESS (proc)); |
e061a11b TZ |
1038 | if (ret < GNUTLS_E_SUCCESS) |
1039 | return gnutls_make_error (ret); | |
1040 | ||
1041 | /* Now verify the peer, following | |
1042 | http://www.gnu.org/software/gnutls/manual/html_node/Verifying-peer_0027s-certificate.html. | |
1043 | The peer should present at least one certificate in the chain; do a | |
1044 | check of the certificate's hostname with | |
1045 | gnutls_x509_crt_check_hostname() against :hostname. */ | |
1046 | ||
0898ca10 | 1047 | ret = fn_gnutls_certificate_verify_peers2 (state, &peer_verification); |
e061a11b TZ |
1048 | if (ret < GNUTLS_E_SUCCESS) |
1049 | return gnutls_make_error (ret); | |
671875da | 1050 | |
e061a11b | 1051 | if (XINT (loglevel) > 0 && peer_verification & GNUTLS_CERT_INVALID) |
435c1d67 CY |
1052 | message ("%s certificate could not be verified.", c_hostname); |
1053 | ||
1054 | if (peer_verification & GNUTLS_CERT_REVOKED) | |
1055 | GNUTLS_LOG2 (1, max_log_level, "certificate was revoked (CRL):", | |
1056 | c_hostname); | |
1057 | ||
1058 | if (peer_verification & GNUTLS_CERT_SIGNER_NOT_FOUND) | |
1059 | GNUTLS_LOG2 (1, max_log_level, "certificate signer was not found:", | |
1060 | c_hostname); | |
1061 | ||
1062 | if (peer_verification & GNUTLS_CERT_SIGNER_NOT_CA) | |
1063 | GNUTLS_LOG2 (1, max_log_level, "certificate signer is not a CA:", | |
1064 | c_hostname); | |
1065 | ||
1066 | if (peer_verification & GNUTLS_CERT_INSECURE_ALGORITHM) | |
1067 | GNUTLS_LOG2 (1, max_log_level, | |
1068 | "certificate was signed with an insecure algorithm:", | |
1069 | c_hostname); | |
1070 | ||
1071 | if (peer_verification & GNUTLS_CERT_NOT_ACTIVATED) | |
1072 | GNUTLS_LOG2 (1, max_log_level, "certificate is not yet activated:", | |
1073 | c_hostname); | |
1074 | ||
1075 | if (peer_verification & GNUTLS_CERT_EXPIRED) | |
1076 | GNUTLS_LOG2 (1, max_log_level, "certificate has expired:", | |
1077 | c_hostname); | |
1078 | ||
1079 | if (peer_verification != 0) | |
1080 | { | |
525d9a3c TZ |
1081 | if (verify_error_all |
1082 | || !NILP (Fmember (QCgnutls_bootprop_trustfiles, verify_error))) | |
31b4827e | 1083 | { |
435c1d67 CY |
1084 | emacs_gnutls_deinit (proc); |
1085 | error ("Certificate validation failed %s, verification code %d", | |
1086 | c_hostname, peer_verification); | |
31b4827e TZ |
1087 | } |
1088 | else | |
1089 | { | |
1090 | GNUTLS_LOG2 (1, max_log_level, "certificate validation failed:", | |
1091 | c_hostname); | |
435c1d67 CY |
1092 | } |
1093 | } | |
e061a11b TZ |
1094 | |
1095 | /* Up to here the process is the same for X.509 certificates and | |
1096 | OpenPGP keys. From now on X.509 certificates are assumed. This | |
1097 | can be easily extended to work with openpgp keys as well. */ | |
0898ca10 | 1098 | if (fn_gnutls_certificate_type_get (state) == GNUTLS_CRT_X509) |
e061a11b | 1099 | { |
435c1d67 CY |
1100 | gnutls_x509_crt_t gnutls_verify_cert; |
1101 | const gnutls_datum_t *gnutls_verify_cert_list; | |
1102 | unsigned int gnutls_verify_cert_list_size; | |
e061a11b | 1103 | |
435c1d67 | 1104 | ret = fn_gnutls_x509_crt_init (&gnutls_verify_cert); |
e061a11b | 1105 | if (ret < GNUTLS_E_SUCCESS) |
b5f03016 | 1106 | return gnutls_make_error (ret); |
e061a11b | 1107 | |
671875da | 1108 | gnutls_verify_cert_list = |
b5f03016 | 1109 | fn_gnutls_certificate_get_peers (state, &gnutls_verify_cert_list_size); |
e061a11b | 1110 | |
435c1d67 | 1111 | if (gnutls_verify_cert_list == NULL) |
b5f03016 | 1112 | { |
435c1d67 CY |
1113 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); |
1114 | emacs_gnutls_deinit (proc); | |
1115 | error ("No x509 certificate was found\n"); | |
b5f03016 | 1116 | } |
e061a11b TZ |
1117 | |
1118 | /* We only check the first certificate in the given chain. */ | |
0898ca10 | 1119 | ret = fn_gnutls_x509_crt_import (gnutls_verify_cert, |
b5f03016 AS |
1120 | &gnutls_verify_cert_list[0], |
1121 | GNUTLS_X509_FMT_DER); | |
e061a11b TZ |
1122 | |
1123 | if (ret < GNUTLS_E_SUCCESS) | |
b5f03016 AS |
1124 | { |
1125 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); | |
1126 | return gnutls_make_error (ret); | |
1127 | } | |
e061a11b | 1128 | |
0898ca10 | 1129 | if (!fn_gnutls_x509_crt_check_hostname (gnutls_verify_cert, c_hostname)) |
b5f03016 | 1130 | { |
525d9a3c TZ |
1131 | if (verify_error_all |
1132 | || !NILP (Fmember (QCgnutls_bootprop_hostname, verify_error))) | |
31b4827e | 1133 | { |
b5f03016 | 1134 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); |
435c1d67 CY |
1135 | emacs_gnutls_deinit (proc); |
1136 | error ("The x509 certificate does not match \"%s\"", c_hostname); | |
31b4827e TZ |
1137 | } |
1138 | else | |
1139 | { | |
1140 | GNUTLS_LOG2 (1, max_log_level, "x509 certificate does not match:", | |
1141 | c_hostname); | |
b5f03016 AS |
1142 | } |
1143 | } | |
0898ca10 | 1144 | fn_gnutls_x509_crt_deinit (gnutls_verify_cert); |
e061a11b TZ |
1145 | } |
1146 | ||
69369809 | 1147 | /* Set this flag only if the whole initialization succeeded. */ |
194b4d9f TZ |
1148 | XPROCESS (proc)->gnutls_p = 1; |
1149 | ||
e061a11b | 1150 | return gnutls_make_error (ret); |
8af55556 TZ |
1151 | } |
1152 | ||
1153 | DEFUN ("gnutls-bye", Fgnutls_bye, | |
1154 | Sgnutls_bye, 2, 2, 0, | |
74f1829d | 1155 | doc: /* Terminate current GnuTLS connection for process PROC. |
8af55556 TZ |
1156 | The connection should have been initiated using `gnutls-handshake'. |
1157 | ||
1158 | If CONT is not nil the TLS connection gets terminated and further | |
74f1829d | 1159 | receives and sends will be disallowed. If the return value is zero you |
8af55556 TZ |
1160 | may continue using the connection. If CONT is nil, GnuTLS actually |
1161 | sends an alert containing a close request and waits for the peer to | |
1162 | reply with the same message. In order to reuse the connection you | |
1163 | should wait for an EOF from the peer. | |
1164 | ||
1165 | This function may also return `gnutls-e-again', or | |
1166 | `gnutls-e-interrupted'. */) | |
1167 | (Lisp_Object proc, Lisp_Object cont) | |
1168 | { | |
1169 | gnutls_session_t state; | |
1170 | int ret; | |
1171 | ||
1172 | CHECK_PROCESS (proc); | |
1173 | ||
1174 | state = XPROCESS (proc)->gnutls_state; | |
1175 | ||
0898ca10 | 1176 | ret = fn_gnutls_bye (state, |
b5f03016 | 1177 | NILP (cont) ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR); |
8af55556 TZ |
1178 | |
1179 | return gnutls_make_error (ret); | |
1180 | } | |
1181 | ||
8af55556 TZ |
1182 | void |
1183 | syms_of_gnutls (void) | |
1184 | { | |
fe6aa7a1 BT |
1185 | #include "gnutls.x" |
1186 | ||
e061a11b TZ |
1187 | gnutls_global_initialized = 0; |
1188 | ||
a555cb87 | 1189 | DEFSYM (Qgnutls_dll, "gnutls"); |
a555cb87 JB |
1190 | DEFSYM (Qgnutls_code, "gnutls-code"); |
1191 | DEFSYM (Qgnutls_anon, "gnutls-anon"); | |
1192 | DEFSYM (Qgnutls_x509pki, "gnutls-x509pki"); | |
a3720aa2 AS |
1193 | DEFSYM (QCgnutls_bootprop_hostname, ":hostname"); |
1194 | DEFSYM (QCgnutls_bootprop_priority, ":priority"); | |
1195 | DEFSYM (QCgnutls_bootprop_trustfiles, ":trustfiles"); | |
1196 | DEFSYM (QCgnutls_bootprop_keylist, ":keylist"); | |
1197 | DEFSYM (QCgnutls_bootprop_crlfiles, ":crlfiles"); | |
1198 | DEFSYM (QCgnutls_bootprop_callbacks, ":callbacks"); | |
1199 | DEFSYM (QCgnutls_bootprop_callbacks_verify, "verify"); | |
1200 | DEFSYM (QCgnutls_bootprop_min_prime_bits, ":min-prime-bits"); | |
1201 | DEFSYM (QCgnutls_bootprop_loglevel, ":loglevel"); | |
1202 | DEFSYM (QCgnutls_bootprop_verify_flags, ":verify-flags"); | |
31b4827e | 1203 | DEFSYM (QCgnutls_bootprop_verify_error, ":verify-error"); |
a555cb87 JB |
1204 | |
1205 | DEFSYM (Qgnutls_e_interrupted, "gnutls-e-interrupted"); | |
8af55556 | 1206 | Fput (Qgnutls_e_interrupted, Qgnutls_code, |
b5f03016 | 1207 | make_number (GNUTLS_E_INTERRUPTED)); |
8af55556 | 1208 | |
a555cb87 | 1209 | DEFSYM (Qgnutls_e_again, "gnutls-e-again"); |
8af55556 | 1210 | Fput (Qgnutls_e_again, Qgnutls_code, |
b5f03016 | 1211 | make_number (GNUTLS_E_AGAIN)); |
8af55556 | 1212 | |
a555cb87 | 1213 | DEFSYM (Qgnutls_e_invalid_session, "gnutls-e-invalid-session"); |
8af55556 | 1214 | Fput (Qgnutls_e_invalid_session, Qgnutls_code, |
b5f03016 | 1215 | make_number (GNUTLS_E_INVALID_SESSION)); |
8af55556 | 1216 | |
a555cb87 | 1217 | DEFSYM (Qgnutls_e_not_ready_for_handshake, "gnutls-e-not-ready-for-handshake"); |
8af55556 | 1218 | Fput (Qgnutls_e_not_ready_for_handshake, Qgnutls_code, |
b5f03016 | 1219 | make_number (GNUTLS_E_APPLICATION_ERROR_MIN)); |
8af55556 | 1220 | |
925a6be7 | 1221 | DEFVAR_INT ("gnutls-log-level", global_gnutls_log_level, |
31fd3586 GM |
1222 | doc: /* Logging level used by the GnuTLS functions. |
1223 | Set this larger than 0 to get debug output in the *Messages* buffer. | |
1224 | 1 is for important messages, 2 is for debug data, and higher numbers | |
1225 | are as per the GnuTLS logging conventions. */); | |
925a6be7 | 1226 | global_gnutls_log_level = 0; |
8af55556 | 1227 | } |
bafcf6a5 JB |
1228 | |
1229 | #endif /* HAVE_GNUTLS */ |