1 /*
2 * Copyright 2006-2023 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /* We need to use some engine deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
12
13 #include <string.h>
14
15 #include <openssl/crypto.h>
16 #include "internal/cryptlib.h"
17 #include <openssl/pem.h>
18 #include <openssl/engine.h>
19 #include <openssl/ts.h>
20 #include <openssl/conf_api.h>
21
22 /* Macro definitions for the configuration file. */
23 #define BASE_SECTION "tsa"
24 #define ENV_DEFAULT_TSA "default_tsa"
25 #define ENV_SERIAL "serial"
26 #define ENV_CRYPTO_DEVICE "crypto_device"
27 #define ENV_SIGNER_CERT "signer_cert"
28 #define ENV_CERTS "certs"
29 #define ENV_SIGNER_KEY "signer_key"
30 #define ENV_SIGNER_DIGEST "signer_digest"
31 #define ENV_DEFAULT_POLICY "default_policy"
32 #define ENV_OTHER_POLICIES "other_policies"
33 #define ENV_DIGESTS "digests"
34 #define ENV_ACCURACY "accuracy"
35 #define ENV_ORDERING "ordering"
36 #define ENV_TSA_NAME "tsa_name"
37 #define ENV_ESS_CERT_ID_CHAIN "ess_cert_id_chain"
38 #define ENV_VALUE_SECS "secs"
39 #define ENV_VALUE_MILLISECS "millisecs"
40 #define ENV_VALUE_MICROSECS "microsecs"
41 #define ENV_CLOCK_PRECISION_DIGITS "clock_precision_digits"
42 #define ENV_VALUE_YES "yes"
43 #define ENV_VALUE_NO "no"
44 #define ENV_ESS_CERT_ID_ALG "ess_cert_id_alg"
45
46 /* Function definitions for certificate and key loading. */
47
TS_CONF_load_cert(const char * file)48 X509 *TS_CONF_load_cert(const char *file)
49 {
50 BIO *cert = NULL;
51 X509 *x = NULL;
52
53 if ((cert = BIO_new_file(file, "r")) == NULL)
54 goto end;
55 x = PEM_read_bio_X509_AUX(cert, NULL, NULL, NULL);
56 end:
57 if (x == NULL)
58 ERR_raise(ERR_LIB_TS, TS_R_CANNOT_LOAD_CERT);
59 BIO_free(cert);
60 return x;
61 }
62
STACK_OF(X509)63 STACK_OF(X509) *TS_CONF_load_certs(const char *file)
64 {
65 BIO *certs = NULL;
66 STACK_OF(X509) *othercerts = NULL;
67 STACK_OF(X509_INFO) *allcerts = NULL;
68 int i;
69
70 if ((certs = BIO_new_file(file, "r")) == NULL)
71 goto end;
72 if ((othercerts = sk_X509_new_null()) == NULL)
73 goto end;
74
75 allcerts = PEM_X509_INFO_read_bio(certs, NULL, NULL, NULL);
76 for (i = 0; i < sk_X509_INFO_num(allcerts); i++) {
77 X509_INFO *xi = sk_X509_INFO_value(allcerts, i);
78
79 if (xi->x509 != NULL) {
80 if (!X509_add_cert(othercerts, xi->x509, X509_ADD_FLAG_DEFAULT)) {
81 OSSL_STACK_OF_X509_free(othercerts);
82 othercerts = NULL;
83 goto end;
84 }
85 xi->x509 = NULL;
86 }
87 }
88 end:
89 if (othercerts == NULL)
90 ERR_raise(ERR_LIB_TS, TS_R_CANNOT_LOAD_CERT);
91 sk_X509_INFO_pop_free(allcerts, X509_INFO_free);
92 BIO_free(certs);
93 return othercerts;
94 }
95
TS_CONF_load_key(const char * file,const char * pass)96 EVP_PKEY *TS_CONF_load_key(const char *file, const char *pass)
97 {
98 BIO *key = NULL;
99 EVP_PKEY *pkey = NULL;
100
101 if ((key = BIO_new_file(file, "r")) == NULL)
102 goto end;
103 pkey = PEM_read_bio_PrivateKey(key, NULL, NULL, (char *)pass);
104 end:
105 if (pkey == NULL)
106 ERR_raise(ERR_LIB_TS, TS_R_CANNOT_LOAD_KEY);
107 BIO_free(key);
108 return pkey;
109 }
110
111 /* Function definitions for handling configuration options. */
112
ts_CONF_lookup_fail(const char * name,const char * tag)113 static void ts_CONF_lookup_fail(const char *name, const char *tag)
114 {
115 ERR_raise_data(ERR_LIB_TS, TS_R_VAR_LOOKUP_FAILURE, "%s::%s", name, tag);
116 }
117
ts_CONF_invalid(const char * name,const char * tag)118 static void ts_CONF_invalid(const char *name, const char *tag)
119 {
120 ERR_raise_data(ERR_LIB_TS, TS_R_VAR_BAD_VALUE, "%s::%s", name, tag);
121 }
122
TS_CONF_get_tsa_section(CONF * conf,const char * section)123 const char *TS_CONF_get_tsa_section(CONF *conf, const char *section)
124 {
125 if (!section) {
126 section = NCONF_get_string(conf, BASE_SECTION, ENV_DEFAULT_TSA);
127 if (!section)
128 ts_CONF_lookup_fail(BASE_SECTION, ENV_DEFAULT_TSA);
129 }
130 return section;
131 }
132
TS_CONF_set_serial(CONF * conf,const char * section,TS_serial_cb cb,TS_RESP_CTX * ctx)133 int TS_CONF_set_serial(CONF *conf, const char *section, TS_serial_cb cb,
134 TS_RESP_CTX *ctx)
135 {
136 int ret = 0;
137 char *serial = NCONF_get_string(conf, section, ENV_SERIAL);
138 if (!serial) {
139 ts_CONF_lookup_fail(section, ENV_SERIAL);
140 goto err;
141 }
142 TS_RESP_CTX_set_serial_cb(ctx, cb, serial);
143
144 ret = 1;
145 err:
146 return ret;
147 }
148
149 #ifndef OPENSSL_NO_ENGINE
150
TS_CONF_set_crypto_device(CONF * conf,const char * section,const char * device)151 int TS_CONF_set_crypto_device(CONF *conf, const char *section,
152 const char *device)
153 {
154 int ret = 0;
155
156 if (device == NULL)
157 device = NCONF_get_string(conf, section, ENV_CRYPTO_DEVICE);
158
159 if (device && !TS_CONF_set_default_engine(device)) {
160 ts_CONF_invalid(section, ENV_CRYPTO_DEVICE);
161 goto err;
162 }
163 ret = 1;
164 err:
165 return ret;
166 }
167
TS_CONF_set_default_engine(const char * name)168 int TS_CONF_set_default_engine(const char *name)
169 {
170 ENGINE *e = NULL;
171 int ret = 0;
172
173 if (strcmp(name, "builtin") == 0)
174 return 1;
175
176 if ((e = ENGINE_by_id(name)) == NULL)
177 goto err;
178 if (strcmp(name, "chil") == 0)
179 ENGINE_ctrl(e, ENGINE_CTRL_CHIL_SET_FORKCHECK, 1, 0, 0);
180 if (!ENGINE_set_default(e, ENGINE_METHOD_ALL))
181 goto err;
182 ret = 1;
183
184 err:
185 if (!ret)
186 ERR_raise_data(ERR_LIB_TS, TS_R_COULD_NOT_SET_ENGINE,
187 "engine:%s", name);
188 ENGINE_free(e);
189 return ret;
190 }
191
192 #endif
193
TS_CONF_set_signer_cert(CONF * conf,const char * section,const char * cert,TS_RESP_CTX * ctx)194 int TS_CONF_set_signer_cert(CONF *conf, const char *section,
195 const char *cert, TS_RESP_CTX *ctx)
196 {
197 int ret = 0;
198 X509 *cert_obj = NULL;
199
200 if (cert == NULL) {
201 cert = NCONF_get_string(conf, section, ENV_SIGNER_CERT);
202 if (cert == NULL) {
203 ts_CONF_lookup_fail(section, ENV_SIGNER_CERT);
204 goto err;
205 }
206 }
207 if ((cert_obj = TS_CONF_load_cert(cert)) == NULL)
208 goto err;
209 if (!TS_RESP_CTX_set_signer_cert(ctx, cert_obj))
210 goto err;
211
212 ret = 1;
213 err:
214 X509_free(cert_obj);
215 return ret;
216 }
217
TS_CONF_set_certs(CONF * conf,const char * section,const char * certs,TS_RESP_CTX * ctx)218 int TS_CONF_set_certs(CONF *conf, const char *section, const char *certs,
219 TS_RESP_CTX *ctx)
220 {
221 int ret = 0;
222 STACK_OF(X509) *certs_obj = NULL;
223
224 if (certs == NULL) {
225 /* Certificate chain is optional. */
226 if ((certs = NCONF_get_string(conf, section, ENV_CERTS)) == NULL)
227 goto end;
228 }
229 if ((certs_obj = TS_CONF_load_certs(certs)) == NULL)
230 goto err;
231 if (!TS_RESP_CTX_set_certs(ctx, certs_obj))
232 goto err;
233 end:
234 ret = 1;
235 err:
236 OSSL_STACK_OF_X509_free(certs_obj);
237 return ret;
238 }
239
TS_CONF_set_signer_key(CONF * conf,const char * section,const char * key,const char * pass,TS_RESP_CTX * ctx)240 int TS_CONF_set_signer_key(CONF *conf, const char *section,
241 const char *key, const char *pass,
242 TS_RESP_CTX *ctx)
243 {
244 int ret = 0;
245 EVP_PKEY *key_obj = NULL;
246 if (!key)
247 key = NCONF_get_string(conf, section, ENV_SIGNER_KEY);
248 if (!key) {
249 ts_CONF_lookup_fail(section, ENV_SIGNER_KEY);
250 goto err;
251 }
252 if ((key_obj = TS_CONF_load_key(key, pass)) == NULL)
253 goto err;
254 if (!TS_RESP_CTX_set_signer_key(ctx, key_obj))
255 goto err;
256
257 ret = 1;
258 err:
259 EVP_PKEY_free(key_obj);
260 return ret;
261 }
262
TS_CONF_set_signer_digest(CONF * conf,const char * section,const char * md,TS_RESP_CTX * ctx)263 int TS_CONF_set_signer_digest(CONF *conf, const char *section,
264 const char *md, TS_RESP_CTX *ctx)
265 {
266 int ret = 0;
267 const EVP_MD *sign_md = NULL;
268 if (md == NULL)
269 md = NCONF_get_string(conf, section, ENV_SIGNER_DIGEST);
270 if (md == NULL) {
271 ts_CONF_lookup_fail(section, ENV_SIGNER_DIGEST);
272 goto err;
273 }
274 sign_md = EVP_get_digestbyname(md);
275 if (sign_md == NULL) {
276 ts_CONF_invalid(section, ENV_SIGNER_DIGEST);
277 goto err;
278 }
279 if (!TS_RESP_CTX_set_signer_digest(ctx, sign_md))
280 goto err;
281
282 ret = 1;
283 err:
284 return ret;
285 }
286
TS_CONF_set_def_policy(CONF * conf,const char * section,const char * policy,TS_RESP_CTX * ctx)287 int TS_CONF_set_def_policy(CONF *conf, const char *section,
288 const char *policy, TS_RESP_CTX *ctx)
289 {
290 int ret = 0;
291 ASN1_OBJECT *policy_obj = NULL;
292
293 if (policy == NULL)
294 policy = NCONF_get_string(conf, section, ENV_DEFAULT_POLICY);
295 if (policy == NULL) {
296 ts_CONF_lookup_fail(section, ENV_DEFAULT_POLICY);
297 goto err;
298 }
299 if ((policy_obj = OBJ_txt2obj(policy, 0)) == NULL) {
300 ts_CONF_invalid(section, ENV_DEFAULT_POLICY);
301 goto err;
302 }
303 if (!TS_RESP_CTX_set_def_policy(ctx, policy_obj))
304 goto err;
305
306 ret = 1;
307 err:
308 ASN1_OBJECT_free(policy_obj);
309 return ret;
310 }
311
TS_CONF_set_policies(CONF * conf,const char * section,TS_RESP_CTX * ctx)312 int TS_CONF_set_policies(CONF *conf, const char *section, TS_RESP_CTX *ctx)
313 {
314 int ret = 0;
315 int i;
316 STACK_OF(CONF_VALUE) *list = NULL;
317 char *policies = NCONF_get_string(conf, section, ENV_OTHER_POLICIES);
318
319 /* If no other policy is specified, that's fine. */
320 if (policies && (list = X509V3_parse_list(policies)) == NULL) {
321 ts_CONF_invalid(section, ENV_OTHER_POLICIES);
322 goto err;
323 }
324 for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
325 CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
326 const char *extval = val->value ? val->value : val->name;
327 ASN1_OBJECT *objtmp;
328
329 if ((objtmp = OBJ_txt2obj(extval, 0)) == NULL) {
330 ts_CONF_invalid(section, ENV_OTHER_POLICIES);
331 goto err;
332 }
333 if (!TS_RESP_CTX_add_policy(ctx, objtmp))
334 goto err;
335 ASN1_OBJECT_free(objtmp);
336 }
337
338 ret = 1;
339 err:
340 sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
341 return ret;
342 }
343
TS_CONF_set_digests(CONF * conf,const char * section,TS_RESP_CTX * ctx)344 int TS_CONF_set_digests(CONF *conf, const char *section, TS_RESP_CTX *ctx)
345 {
346 int ret = 0;
347 int i;
348 STACK_OF(CONF_VALUE) *list = NULL;
349 char *digests = NCONF_get_string(conf, section, ENV_DIGESTS);
350
351 if (digests == NULL) {
352 ts_CONF_lookup_fail(section, ENV_DIGESTS);
353 goto err;
354 }
355 if ((list = X509V3_parse_list(digests)) == NULL) {
356 ts_CONF_invalid(section, ENV_DIGESTS);
357 goto err;
358 }
359 if (sk_CONF_VALUE_num(list) == 0) {
360 ts_CONF_invalid(section, ENV_DIGESTS);
361 goto err;
362 }
363 for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
364 CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
365 const char *extval = val->value ? val->value : val->name;
366 const EVP_MD *md;
367
368 if ((md = EVP_get_digestbyname(extval)) == NULL) {
369 ts_CONF_invalid(section, ENV_DIGESTS);
370 goto err;
371 }
372 if (!TS_RESP_CTX_add_md(ctx, md))
373 goto err;
374 }
375
376 ret = 1;
377 err:
378 sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
379 return ret;
380 }
381
TS_CONF_set_accuracy(CONF * conf,const char * section,TS_RESP_CTX * ctx)382 int TS_CONF_set_accuracy(CONF *conf, const char *section, TS_RESP_CTX *ctx)
383 {
384 int ret = 0;
385 int i;
386 int secs = 0, millis = 0, micros = 0;
387 STACK_OF(CONF_VALUE) *list = NULL;
388 char *accuracy = NCONF_get_string(conf, section, ENV_ACCURACY);
389
390 if (accuracy && (list = X509V3_parse_list(accuracy)) == NULL) {
391 ts_CONF_invalid(section, ENV_ACCURACY);
392 goto err;
393 }
394 for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
395 CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
396 if (strcmp(val->name, ENV_VALUE_SECS) == 0) {
397 if (val->value)
398 secs = atoi(val->value);
399 } else if (strcmp(val->name, ENV_VALUE_MILLISECS) == 0) {
400 if (val->value)
401 millis = atoi(val->value);
402 } else if (strcmp(val->name, ENV_VALUE_MICROSECS) == 0) {
403 if (val->value)
404 micros = atoi(val->value);
405 } else {
406 ts_CONF_invalid(section, ENV_ACCURACY);
407 goto err;
408 }
409 }
410 if (!TS_RESP_CTX_set_accuracy(ctx, secs, millis, micros))
411 goto err;
412
413 ret = 1;
414 err:
415 sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
416 return ret;
417 }
418
TS_CONF_set_clock_precision_digits(const CONF * conf,const char * section,TS_RESP_CTX * ctx)419 int TS_CONF_set_clock_precision_digits(const CONF *conf, const char *section,
420 TS_RESP_CTX *ctx)
421 {
422 int ret = 0;
423 long digits = 0;
424
425 /*
426 * If not specified, set the default value to 0, i.e. sec precision
427 */
428 digits = _CONF_get_number(conf, section, ENV_CLOCK_PRECISION_DIGITS);
429 if (digits < 0 || digits > TS_MAX_CLOCK_PRECISION_DIGITS) {
430 ts_CONF_invalid(section, ENV_CLOCK_PRECISION_DIGITS);
431 goto err;
432 }
433
434 if (!TS_RESP_CTX_set_clock_precision_digits(ctx, digits))
435 goto err;
436
437 return 1;
438 err:
439 return ret;
440 }
441
ts_CONF_add_flag(CONF * conf,const char * section,const char * field,int flag,TS_RESP_CTX * ctx)442 static int ts_CONF_add_flag(CONF *conf, const char *section,
443 const char *field, int flag, TS_RESP_CTX *ctx)
444 {
445 const char *value = NCONF_get_string(conf, section, field);
446
447 if (value) {
448 if (strcmp(value, ENV_VALUE_YES) == 0)
449 TS_RESP_CTX_add_flags(ctx, flag);
450 else if (strcmp(value, ENV_VALUE_NO) != 0) {
451 ts_CONF_invalid(section, field);
452 return 0;
453 }
454 }
455
456 return 1;
457 }
458
TS_CONF_set_ordering(CONF * conf,const char * section,TS_RESP_CTX * ctx)459 int TS_CONF_set_ordering(CONF *conf, const char *section, TS_RESP_CTX *ctx)
460 {
461 return ts_CONF_add_flag(conf, section, ENV_ORDERING, TS_ORDERING, ctx);
462 }
463
TS_CONF_set_tsa_name(CONF * conf,const char * section,TS_RESP_CTX * ctx)464 int TS_CONF_set_tsa_name(CONF *conf, const char *section, TS_RESP_CTX *ctx)
465 {
466 return ts_CONF_add_flag(conf, section, ENV_TSA_NAME, TS_TSA_NAME, ctx);
467 }
468
TS_CONF_set_ess_cert_id_chain(CONF * conf,const char * section,TS_RESP_CTX * ctx)469 int TS_CONF_set_ess_cert_id_chain(CONF *conf, const char *section,
470 TS_RESP_CTX *ctx)
471 {
472 return ts_CONF_add_flag(conf, section, ENV_ESS_CERT_ID_CHAIN,
473 TS_ESS_CERT_ID_CHAIN, ctx);
474 }
475
TS_CONF_set_ess_cert_id_digest(CONF * conf,const char * section,TS_RESP_CTX * ctx)476 int TS_CONF_set_ess_cert_id_digest(CONF *conf, const char *section,
477 TS_RESP_CTX *ctx)
478 {
479 int ret = 0;
480 const EVP_MD *cert_md = NULL;
481 const char *md = NCONF_get_string(conf, section, ENV_ESS_CERT_ID_ALG);
482
483 if (md == NULL)
484 md = "sha256";
485
486 cert_md = EVP_get_digestbyname(md);
487 if (cert_md == NULL) {
488 ts_CONF_invalid(section, ENV_ESS_CERT_ID_ALG);
489 goto err;
490 }
491
492 if (!TS_RESP_CTX_set_ess_cert_id_digest(ctx, cert_md))
493 goto err;
494
495 ret = 1;
496 err:
497 return ret;
498 }
499
