1/*
2 * Copyright 2006-2016 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#include <string.h>
11
12#include <openssl/crypto.h>
13#include "internal/cryptlib.h"
14#include <openssl/pem.h>
15#include <openssl/engine.h>
16#include <openssl/ts.h>
17
18/* Macro definitions for the configuration file. */
19#define BASE_SECTION "tsa"
20#define ENV_DEFAULT_TSA "default_tsa"
21#define ENV_SERIAL "serial"
22#define ENV_CRYPTO_DEVICE "crypto_device"
23#define ENV_SIGNER_CERT "signer_cert"
24#define ENV_CERTS "certs"
25#define ENV_SIGNER_KEY "signer_key"
26#define ENV_SIGNER_DIGEST "signer_digest"
27#define ENV_DEFAULT_POLICY "default_policy"
28#define ENV_OTHER_POLICIES "other_policies"
29#define ENV_DIGESTS "digests"
30#define ENV_ACCURACY "accuracy"
31#define ENV_ORDERING "ordering"
32#define ENV_TSA_NAME "tsa_name"
33#define ENV_ESS_CERT_ID_CHAIN "ess_cert_id_chain"
34#define ENV_VALUE_SECS "secs"
35#define ENV_VALUE_MILLISECS "millisecs"
36#define ENV_VALUE_MICROSECS "microsecs"
37#define ENV_CLOCK_PRECISION_DIGITS "clock_precision_digits"
38#define ENV_VALUE_YES "yes"
39#define ENV_VALUE_NO "no"
40#define ENV_ESS_CERT_ID_ALG "ess_cert_id_alg"
41
42/* Function definitions for certificate and key loading. */
43
44X509 *TS_CONF_load_cert(const char *file)
45{
46 BIO *cert = NULL;
47 X509 *x = NULL;
48
49 if ((cert = BIO_new_file(file, "r")) == NULL)
50 goto end;
51 x = PEM_read_bio_X509_AUX(cert, NULL, NULL, NULL);
52 end:
53 if (x == NULL)
54 TSerr(TS_F_TS_CONF_LOAD_CERT, TS_R_CANNOT_LOAD_CERT);
55 BIO_free(cert);
56 return x;
57}
58
59STACK_OF(X509) *TS_CONF_load_certs(const char *file)
60{
61 BIO *certs = NULL;
62 STACK_OF(X509) *othercerts = NULL;
63 STACK_OF(X509_INFO) *allcerts = NULL;
64 int i;
65
66 if ((certs = BIO_new_file(file, "r")) == NULL)
67 goto end;
68 if ((othercerts = sk_X509_new_null()) == NULL)
69 goto end;
70
71 allcerts = PEM_X509_INFO_read_bio(certs, NULL, NULL, NULL);
72 for (i = 0; i < sk_X509_INFO_num(allcerts); i++) {
73 X509_INFO *xi = sk_X509_INFO_value(allcerts, i);
74 if (xi->x509) {
75 sk_X509_push(othercerts, xi->x509);
76 xi->x509 = NULL;
77 }
78 }
79 end:
80 if (othercerts == NULL)
81 TSerr(TS_F_TS_CONF_LOAD_CERTS, TS_R_CANNOT_LOAD_CERT);
82 sk_X509_INFO_pop_free(allcerts, X509_INFO_free);
83 BIO_free(certs);
84 return othercerts;
85}
86
87EVP_PKEY *TS_CONF_load_key(const char *file, const char *pass)
88{
89 BIO *key = NULL;
90 EVP_PKEY *pkey = NULL;
91
92 if ((key = BIO_new_file(file, "r")) == NULL)
93 goto end;
94 pkey = PEM_read_bio_PrivateKey(key, NULL, NULL, (char *)pass);
95 end:
96 if (pkey == NULL)
97 TSerr(TS_F_TS_CONF_LOAD_KEY, TS_R_CANNOT_LOAD_KEY);
98 BIO_free(key);
99 return pkey;
100}
101
102/* Function definitions for handling configuration options. */
103
104static void ts_CONF_lookup_fail(const char *name, const char *tag)
105{
106 TSerr(TS_F_TS_CONF_LOOKUP_FAIL, TS_R_VAR_LOOKUP_FAILURE);
107 ERR_add_error_data(3, name, "::", tag);
108}
109
110static void ts_CONF_invalid(const char *name, const char *tag)
111{
112 TSerr(TS_F_TS_CONF_INVALID, TS_R_VAR_BAD_VALUE);
113 ERR_add_error_data(3, name, "::", tag);
114}
115
116const char *TS_CONF_get_tsa_section(CONF *conf, const char *section)
117{
118 if (!section) {
119 section = NCONF_get_string(conf, BASE_SECTION, ENV_DEFAULT_TSA);
120 if (!section)
121 ts_CONF_lookup_fail(BASE_SECTION, ENV_DEFAULT_TSA);
122 }
123 return section;
124}
125
126int TS_CONF_set_serial(CONF *conf, const char *section, TS_serial_cb cb,
127 TS_RESP_CTX *ctx)
128{
129 int ret = 0;
130 char *serial = NCONF_get_string(conf, section, ENV_SERIAL);
131 if (!serial) {
132 ts_CONF_lookup_fail(section, ENV_SERIAL);
133 goto err;
134 }
135 TS_RESP_CTX_set_serial_cb(ctx, cb, serial);
136
137 ret = 1;
138 err:
139 return ret;
140}
141
142#ifndef OPENSSL_NO_ENGINE
143
144int TS_CONF_set_crypto_device(CONF *conf, const char *section,
145 const char *device)
146{
147 int ret = 0;
148
149 if (device == NULL)
150 device = NCONF_get_string(conf, section, ENV_CRYPTO_DEVICE);
151
152 if (device && !TS_CONF_set_default_engine(device)) {
153 ts_CONF_invalid(section, ENV_CRYPTO_DEVICE);
154 goto err;
155 }
156 ret = 1;
157 err:
158 return ret;
159}
160
161int TS_CONF_set_default_engine(const char *name)
162{
163 ENGINE *e = NULL;
164 int ret = 0;
165
166 if (strcmp(name, "builtin") == 0)
167 return 1;
168
169 if ((e = ENGINE_by_id(name)) == NULL)
170 goto err;
171 if (strcmp(name, "chil") == 0)
172 ENGINE_ctrl(e, ENGINE_CTRL_CHIL_SET_FORKCHECK, 1, 0, 0);
173 if (!ENGINE_set_default(e, ENGINE_METHOD_ALL))
174 goto err;
175 ret = 1;
176
177 err:
178 if (!ret) {
179 TSerr(TS_F_TS_CONF_SET_DEFAULT_ENGINE, TS_R_COULD_NOT_SET_ENGINE);
180 ERR_add_error_data(2, "engine:", name);
181 }
182 ENGINE_free(e);
183 return ret;
184}
185
186#endif
187
188int TS_CONF_set_signer_cert(CONF *conf, const char *section,
189 const char *cert, TS_RESP_CTX *ctx)
190{
191 int ret = 0;
192 X509 *cert_obj = NULL;
193
194 if (cert == NULL) {
195 cert = NCONF_get_string(conf, section, ENV_SIGNER_CERT);
196 if (cert == NULL) {
197 ts_CONF_lookup_fail(section, ENV_SIGNER_CERT);
198 goto err;
199 }
200 }
201 if ((cert_obj = TS_CONF_load_cert(cert)) == NULL)
202 goto err;
203 if (!TS_RESP_CTX_set_signer_cert(ctx, cert_obj))
204 goto err;
205
206 ret = 1;
207 err:
208 X509_free(cert_obj);
209 return ret;
210}
211
212int TS_CONF_set_certs(CONF *conf, const char *section, const char *certs,
213 TS_RESP_CTX *ctx)
214{
215 int ret = 0;
216 STACK_OF(X509) *certs_obj = NULL;
217
218 if (certs == NULL) {
219 /* Certificate chain is optional. */
220 if ((certs = NCONF_get_string(conf, section, ENV_CERTS)) == NULL)
221 goto end;
222 }
223 if ((certs_obj = TS_CONF_load_certs(certs)) == NULL)
224 goto err;
225 if (!TS_RESP_CTX_set_certs(ctx, certs_obj))
226 goto err;
227 end:
228 ret = 1;
229 err:
230 sk_X509_pop_free(certs_obj, X509_free);
231 return ret;
232}
233
234int TS_CONF_set_signer_key(CONF *conf, const char *section,
235 const char *key, const char *pass,
236 TS_RESP_CTX *ctx)
237{
238 int ret = 0;
239 EVP_PKEY *key_obj = NULL;
240 if (!key)
241 key = NCONF_get_string(conf, section, ENV_SIGNER_KEY);
242 if (!key) {
243 ts_CONF_lookup_fail(section, ENV_SIGNER_KEY);
244 goto err;
245 }
246 if ((key_obj = TS_CONF_load_key(key, pass)) == NULL)
247 goto err;
248 if (!TS_RESP_CTX_set_signer_key(ctx, key_obj))
249 goto err;
250
251 ret = 1;
252 err:
253 EVP_PKEY_free(key_obj);
254 return ret;
255}
256
257int TS_CONF_set_signer_digest(CONF *conf, const char *section,
258 const char *md, TS_RESP_CTX *ctx)
259{
260 int ret = 0;
261 const EVP_MD *sign_md = NULL;
262 if (md == NULL)
263 md = NCONF_get_string(conf, section, ENV_SIGNER_DIGEST);
264 if (md == NULL) {
265 ts_CONF_lookup_fail(section, ENV_SIGNER_DIGEST);
266 goto err;
267 }
268 sign_md = EVP_get_digestbyname(md);
269 if (sign_md == NULL) {
270 ts_CONF_invalid(section, ENV_SIGNER_DIGEST);
271 goto err;
272 }
273 if (!TS_RESP_CTX_set_signer_digest(ctx, sign_md))
274 goto err;
275
276 ret = 1;
277 err:
278 return ret;
279}
280
281int TS_CONF_set_def_policy(CONF *conf, const char *section,
282 const char *policy, TS_RESP_CTX *ctx)
283{
284 int ret = 0;
285 ASN1_OBJECT *policy_obj = NULL;
286
287 if (policy == NULL)
288 policy = NCONF_get_string(conf, section, ENV_DEFAULT_POLICY);
289 if (policy == NULL) {
290 ts_CONF_lookup_fail(section, ENV_DEFAULT_POLICY);
291 goto err;
292 }
293 if ((policy_obj = OBJ_txt2obj(policy, 0)) == NULL) {
294 ts_CONF_invalid(section, ENV_DEFAULT_POLICY);
295 goto err;
296 }
297 if (!TS_RESP_CTX_set_def_policy(ctx, policy_obj))
298 goto err;
299
300 ret = 1;
301 err:
302 ASN1_OBJECT_free(policy_obj);
303 return ret;
304}
305
306int TS_CONF_set_policies(CONF *conf, const char *section, TS_RESP_CTX *ctx)
307{
308 int ret = 0;
309 int i;
310 STACK_OF(CONF_VALUE) *list = NULL;
311 char *policies = NCONF_get_string(conf, section, ENV_OTHER_POLICIES);
312
313 /* If no other policy is specified, that's fine. */
314 if (policies && (list = X509V3_parse_list(policies)) == NULL) {
315 ts_CONF_invalid(section, ENV_OTHER_POLICIES);
316 goto err;
317 }
318 for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
319 CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
320 const char *extval = val->value ? val->value : val->name;
321 ASN1_OBJECT *objtmp;
322
323 if ((objtmp = OBJ_txt2obj(extval, 0)) == NULL) {
324 ts_CONF_invalid(section, ENV_OTHER_POLICIES);
325 goto err;
326 }
327 if (!TS_RESP_CTX_add_policy(ctx, objtmp))
328 goto err;
329 ASN1_OBJECT_free(objtmp);
330 }
331
332 ret = 1;
333 err:
334 sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
335 return ret;
336}
337
338int TS_CONF_set_digests(CONF *conf, const char *section, TS_RESP_CTX *ctx)
339{
340 int ret = 0;
341 int i;
342 STACK_OF(CONF_VALUE) *list = NULL;
343 char *digests = NCONF_get_string(conf, section, ENV_DIGESTS);
344
345 if (digests == NULL) {
346 ts_CONF_lookup_fail(section, ENV_DIGESTS);
347 goto err;
348 }
349 if ((list = X509V3_parse_list(digests)) == NULL) {
350 ts_CONF_invalid(section, ENV_DIGESTS);
351 goto err;
352 }
353 if (sk_CONF_VALUE_num(list) == 0) {
354 ts_CONF_invalid(section, ENV_DIGESTS);
355 goto err;
356 }
357 for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
358 CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
359 const char *extval = val->value ? val->value : val->name;
360 const EVP_MD *md;
361
362 if ((md = EVP_get_digestbyname(extval)) == NULL) {
363 ts_CONF_invalid(section, ENV_DIGESTS);
364 goto err;
365 }
366 if (!TS_RESP_CTX_add_md(ctx, md))
367 goto err;
368 }
369
370 ret = 1;
371 err:
372 sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
373 return ret;
374}
375
376int TS_CONF_set_accuracy(CONF *conf, const char *section, TS_RESP_CTX *ctx)
377{
378 int ret = 0;
379 int i;
380 int secs = 0, millis = 0, micros = 0;
381 STACK_OF(CONF_VALUE) *list = NULL;
382 char *accuracy = NCONF_get_string(conf, section, ENV_ACCURACY);
383
384 if (accuracy && (list = X509V3_parse_list(accuracy)) == NULL) {
385 ts_CONF_invalid(section, ENV_ACCURACY);
386 goto err;
387 }
388 for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
389 CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
390 if (strcmp(val->name, ENV_VALUE_SECS) == 0) {
391 if (val->value)
392 secs = atoi(val->value);
393 } else if (strcmp(val->name, ENV_VALUE_MILLISECS) == 0) {
394 if (val->value)
395 millis = atoi(val->value);
396 } else if (strcmp(val->name, ENV_VALUE_MICROSECS) == 0) {
397 if (val->value)
398 micros = atoi(val->value);
399 } else {
400 ts_CONF_invalid(section, ENV_ACCURACY);
401 goto err;
402 }
403 }
404 if (!TS_RESP_CTX_set_accuracy(ctx, secs, millis, micros))
405 goto err;
406
407 ret = 1;
408 err:
409 sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
410 return ret;
411}
412
413int TS_CONF_set_clock_precision_digits(CONF *conf, const char *section,
414 TS_RESP_CTX *ctx)
415{
416 int ret = 0;
417 long digits = 0;
418
419 /*
420 * If not specified, set the default value to 0, i.e. sec precision
421 */
422 if (!NCONF_get_number_e(conf, section, ENV_CLOCK_PRECISION_DIGITS,
423 &digits))
424 digits = 0;
425 if (digits < 0 || digits > TS_MAX_CLOCK_PRECISION_DIGITS) {
426 ts_CONF_invalid(section, ENV_CLOCK_PRECISION_DIGITS);
427 goto err;
428 }
429
430 if (!TS_RESP_CTX_set_clock_precision_digits(ctx, digits))
431 goto err;
432
433 return 1;
434 err:
435 return ret;
436}
437
438static int ts_CONF_add_flag(CONF *conf, const char *section,
439 const char *field, int flag, TS_RESP_CTX *ctx)
440{
441 const char *value = NCONF_get_string(conf, section, field);
442
443 if (value) {
444 if (strcmp(value, ENV_VALUE_YES) == 0)
445 TS_RESP_CTX_add_flags(ctx, flag);
446 else if (strcmp(value, ENV_VALUE_NO) != 0) {
447 ts_CONF_invalid(section, field);
448 return 0;
449 }
450 }
451
452 return 1;
453}
454
455int TS_CONF_set_ordering(CONF *conf, const char *section, TS_RESP_CTX *ctx)
456{
457 return ts_CONF_add_flag(conf, section, ENV_ORDERING, TS_ORDERING, ctx);
458}
459
460int TS_CONF_set_tsa_name(CONF *conf, const char *section, TS_RESP_CTX *ctx)
461{
462 return ts_CONF_add_flag(conf, section, ENV_TSA_NAME, TS_TSA_NAME, ctx);
463}
464
465int TS_CONF_set_ess_cert_id_chain(CONF *conf, const char *section,
466 TS_RESP_CTX *ctx)
467{
468 return ts_CONF_add_flag(conf, section, ENV_ESS_CERT_ID_CHAIN,
469 TS_ESS_CERT_ID_CHAIN, ctx);
470}
471
472int TS_CONF_set_ess_cert_id_digest(CONF *conf, const char *section,
473 TS_RESP_CTX *ctx)
474{
475 int ret = 0;
476 const EVP_MD *cert_md = NULL;
477 const char *md = NCONF_get_string(conf, section, ENV_ESS_CERT_ID_ALG);
478
479 if (md == NULL)
480 md = "sha1";
481
482 cert_md = EVP_get_digestbyname(md);
483 if (cert_md == NULL) {
484 ts_CONF_invalid(section, ENV_ESS_CERT_ID_ALG);
485 goto err;
486 }
487
488 if (!TS_RESP_CTX_set_ess_cert_id_digest(ctx, cert_md))
489 goto err;
490
491 ret = 1;
492err:
493 return ret;
494}
495