1 /*
2 * Copyright 1999-2024 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 <stdio.h>
11 #include "internal/cryptlib.h"
12 #include <openssl/conf.h>
13 #include <openssl/asn1.h>
14 #include <openssl/asn1t.h>
15 #include <openssl/x509v3.h>
16
17 #include "crypto/x509.h"
18 #include "ext_dat.h"
19 #include "x509_local.h"
20
21 static void *v2i_crld(const X509V3_EXT_METHOD *method,
22 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
23 static int i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out,
24 int indent);
25
26 const X509V3_EXT_METHOD ossl_v3_crld = {
27 NID_crl_distribution_points, 0, ASN1_ITEM_ref(CRL_DIST_POINTS),
28 0, 0, 0, 0,
29 0, 0,
30 0,
31 v2i_crld,
32 i2r_crldp, 0,
33 NULL
34 };
35
36 const X509V3_EXT_METHOD ossl_v3_freshest_crl = {
37 NID_freshest_crl, 0, ASN1_ITEM_ref(CRL_DIST_POINTS),
38 0, 0, 0, 0,
39 0, 0,
40 0,
41 v2i_crld,
42 i2r_crldp, 0,
43 NULL
44 };
45
STACK_OF(GENERAL_NAME)46 static STACK_OF(GENERAL_NAME) *gnames_from_sectname(X509V3_CTX *ctx,
47 char *sect)
48 {
49 STACK_OF(CONF_VALUE) *gnsect;
50 STACK_OF(GENERAL_NAME) *gens;
51 if (*sect == '@')
52 gnsect = X509V3_get_section(ctx, sect + 1);
53 else
54 gnsect = X509V3_parse_list(sect);
55 if (!gnsect) {
56 ERR_raise(ERR_LIB_X509V3, X509V3_R_SECTION_NOT_FOUND);
57 return NULL;
58 }
59 gens = v2i_GENERAL_NAMES(NULL, ctx, gnsect);
60 if (*sect == '@')
61 X509V3_section_free(ctx, gnsect);
62 else
63 sk_CONF_VALUE_pop_free(gnsect, X509V3_conf_free);
64 return gens;
65 }
66
set_dist_point_name(DIST_POINT_NAME ** pdp,X509V3_CTX * ctx,CONF_VALUE * cnf)67 static int set_dist_point_name(DIST_POINT_NAME **pdp, X509V3_CTX *ctx,
68 CONF_VALUE *cnf)
69 {
70 STACK_OF(GENERAL_NAME) *fnm = NULL;
71 STACK_OF(X509_NAME_ENTRY) *rnm = NULL;
72
73 if (cnf->value == NULL) {
74 ERR_raise(ERR_LIB_X509V3, X509V3_R_MISSING_VALUE);
75 goto err;
76 }
77
78 if (HAS_PREFIX(cnf->name, "fullname")) {
79 fnm = gnames_from_sectname(ctx, cnf->value);
80 if (!fnm)
81 goto err;
82 } else if (strcmp(cnf->name, "relativename") == 0) {
83 int ret;
84 STACK_OF(CONF_VALUE) *dnsect;
85 X509_NAME *nm;
86 nm = X509_NAME_new();
87 if (nm == NULL)
88 return -1;
89 dnsect = X509V3_get_section(ctx, cnf->value);
90 if (!dnsect) {
91 X509_NAME_free(nm);
92 ERR_raise(ERR_LIB_X509V3, X509V3_R_SECTION_NOT_FOUND);
93 return -1;
94 }
95 ret = X509V3_NAME_from_section(nm, dnsect, MBSTRING_ASC);
96 X509V3_section_free(ctx, dnsect);
97 rnm = nm->entries;
98 nm->entries = NULL;
99 X509_NAME_free(nm);
100 if (!ret || sk_X509_NAME_ENTRY_num(rnm) <= 0)
101 goto err;
102 /*
103 * Since its a name fragment can't have more than one RDNSequence
104 */
105 if (sk_X509_NAME_ENTRY_value(rnm,
106 sk_X509_NAME_ENTRY_num(rnm) - 1)->set) {
107 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_MULTIPLE_RDNS);
108 goto err;
109 }
110 } else
111 return 0;
112
113 if (*pdp) {
114 ERR_raise(ERR_LIB_X509V3, X509V3_R_DISTPOINT_ALREADY_SET);
115 goto err;
116 }
117
118 *pdp = DIST_POINT_NAME_new();
119 if (*pdp == NULL)
120 goto err;
121 if (fnm) {
122 (*pdp)->type = 0;
123 (*pdp)->name.fullname = fnm;
124 } else {
125 (*pdp)->type = 1;
126 (*pdp)->name.relativename = rnm;
127 }
128
129 return 1;
130
131 err:
132 sk_GENERAL_NAME_pop_free(fnm, GENERAL_NAME_free);
133 sk_X509_NAME_ENTRY_pop_free(rnm, X509_NAME_ENTRY_free);
134 return -1;
135 }
136
137 static const BIT_STRING_BITNAME reason_flags[] = {
138 {0, "Unused", "unused"},
139 {1, "Key Compromise", "keyCompromise"},
140 {2, "CA Compromise", "CACompromise"},
141 {3, "Affiliation Changed", "affiliationChanged"},
142 {4, "Superseded", "superseded"},
143 {5, "Cessation Of Operation", "cessationOfOperation"},
144 {6, "Certificate Hold", "certificateHold"},
145 {7, "Privilege Withdrawn", "privilegeWithdrawn"},
146 {8, "AA Compromise", "AACompromise"},
147 {-1, NULL, NULL}
148 };
149
set_reasons(ASN1_BIT_STRING ** preas,char * value)150 static int set_reasons(ASN1_BIT_STRING **preas, char *value)
151 {
152 STACK_OF(CONF_VALUE) *rsk = NULL;
153 const BIT_STRING_BITNAME *pbn;
154 const char *bnam;
155 int i, ret = 0;
156 rsk = X509V3_parse_list(value);
157 if (rsk == NULL)
158 return 0;
159 if (*preas != NULL)
160 goto err;
161 for (i = 0; i < sk_CONF_VALUE_num(rsk); i++) {
162 bnam = sk_CONF_VALUE_value(rsk, i)->name;
163 if (*preas == NULL) {
164 *preas = ASN1_BIT_STRING_new();
165 if (*preas == NULL)
166 goto err;
167 }
168 for (pbn = reason_flags; pbn->lname; pbn++) {
169 if (strcmp(pbn->sname, bnam) == 0) {
170 if (!ASN1_BIT_STRING_set_bit(*preas, pbn->bitnum, 1))
171 goto err;
172 break;
173 }
174 }
175 if (pbn->lname == NULL)
176 goto err;
177 }
178 ret = 1;
179
180 err:
181 sk_CONF_VALUE_pop_free(rsk, X509V3_conf_free);
182 return ret;
183 }
184
print_reasons(BIO * out,const char * rname,ASN1_BIT_STRING * rflags,int indent)185 static int print_reasons(BIO *out, const char *rname,
186 ASN1_BIT_STRING *rflags, int indent)
187 {
188 int first = 1;
189 const BIT_STRING_BITNAME *pbn;
190 BIO_printf(out, "%*s%s:\n%*s", indent, "", rname, indent + 2, "");
191 for (pbn = reason_flags; pbn->lname; pbn++) {
192 if (ASN1_BIT_STRING_get_bit(rflags, pbn->bitnum)) {
193 if (first)
194 first = 0;
195 else
196 BIO_puts(out, ", ");
197 BIO_puts(out, pbn->lname);
198 }
199 }
200 if (first)
201 BIO_puts(out, "<EMPTY>\n");
202 else
203 BIO_puts(out, "\n");
204 return 1;
205 }
206
crldp_from_section(X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* nval)207 static DIST_POINT *crldp_from_section(X509V3_CTX *ctx,
208 STACK_OF(CONF_VALUE) *nval)
209 {
210 int i;
211 CONF_VALUE *cnf;
212 DIST_POINT *point = DIST_POINT_new();
213
214 if (point == NULL)
215 goto err;
216 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
217 int ret;
218 cnf = sk_CONF_VALUE_value(nval, i);
219 ret = set_dist_point_name(&point->distpoint, ctx, cnf);
220 if (ret > 0)
221 continue;
222 if (ret < 0)
223 goto err;
224 if (strcmp(cnf->name, "reasons") == 0) {
225 if (!set_reasons(&point->reasons, cnf->value))
226 goto err;
227 } else if (strcmp(cnf->name, "CRLissuer") == 0) {
228 point->CRLissuer = gnames_from_sectname(ctx, cnf->value);
229 if (point->CRLissuer == NULL)
230 goto err;
231 }
232 }
233
234 return point;
235
236 err:
237 DIST_POINT_free(point);
238 return NULL;
239 }
240
v2i_crld(const X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* nval)241 static void *v2i_crld(const X509V3_EXT_METHOD *method,
242 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
243 {
244 STACK_OF(DIST_POINT) *crld;
245 GENERAL_NAMES *gens = NULL;
246 GENERAL_NAME *gen = NULL;
247 CONF_VALUE *cnf;
248 const int num = sk_CONF_VALUE_num(nval);
249 int i;
250
251 crld = sk_DIST_POINT_new_reserve(NULL, num);
252 if (crld == NULL) {
253 ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
254 goto err;
255 }
256 for (i = 0; i < num; i++) {
257 DIST_POINT *point;
258
259 cnf = sk_CONF_VALUE_value(nval, i);
260 if (cnf->value == NULL) {
261 STACK_OF(CONF_VALUE) *dpsect;
262 dpsect = X509V3_get_section(ctx, cnf->name);
263 if (!dpsect)
264 goto err;
265 point = crldp_from_section(ctx, dpsect);
266 X509V3_section_free(ctx, dpsect);
267 if (point == NULL)
268 goto err;
269 sk_DIST_POINT_push(crld, point); /* no failure as it was reserved */
270 } else {
271 if ((gen = v2i_GENERAL_NAME(method, ctx, cnf)) == NULL)
272 goto err;
273 if ((gens = GENERAL_NAMES_new()) == NULL) {
274 ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
275 goto err;
276 }
277 if (!sk_GENERAL_NAME_push(gens, gen)) {
278 ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
279 goto err;
280 }
281 gen = NULL;
282 if ((point = DIST_POINT_new()) == NULL) {
283 ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
284 goto err;
285 }
286 sk_DIST_POINT_push(crld, point); /* no failure as it was reserved */
287 if ((point->distpoint = DIST_POINT_NAME_new()) == NULL) {
288 ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
289 goto err;
290 }
291 point->distpoint->name.fullname = gens;
292 point->distpoint->type = 0;
293 gens = NULL;
294 }
295 }
296 return crld;
297
298 err:
299 GENERAL_NAME_free(gen);
300 GENERAL_NAMES_free(gens);
301 sk_DIST_POINT_pop_free(crld, DIST_POINT_free);
302 return NULL;
303 }
304
dpn_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it,void * exarg)305 static int dpn_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
306 void *exarg)
307 {
308 DIST_POINT_NAME *dpn = (DIST_POINT_NAME *)*pval;
309
310 switch (operation) {
311 case ASN1_OP_NEW_POST:
312 dpn->dpname = NULL;
313 break;
314
315 case ASN1_OP_FREE_POST:
316 X509_NAME_free(dpn->dpname);
317 break;
318 }
319 return 1;
320 }
321
322
323 ASN1_CHOICE_cb(DIST_POINT_NAME, dpn_cb) = {
324 ASN1_IMP_SEQUENCE_OF(DIST_POINT_NAME, name.fullname, GENERAL_NAME, 0),
325 ASN1_IMP_SET_OF(DIST_POINT_NAME, name.relativename, X509_NAME_ENTRY, 1)
326 } ASN1_CHOICE_END_cb(DIST_POINT_NAME, DIST_POINT_NAME, type)
327
328
329 IMPLEMENT_ASN1_FUNCTIONS(DIST_POINT_NAME)
330 IMPLEMENT_ASN1_DUP_FUNCTION(DIST_POINT_NAME)
331
332 ASN1_SEQUENCE(DIST_POINT) = {
333 ASN1_EXP_OPT(DIST_POINT, distpoint, DIST_POINT_NAME, 0),
334 ASN1_IMP_OPT(DIST_POINT, reasons, ASN1_BIT_STRING, 1),
335 ASN1_IMP_SEQUENCE_OF_OPT(DIST_POINT, CRLissuer, GENERAL_NAME, 2)
336 } ASN1_SEQUENCE_END(DIST_POINT)
337
338 IMPLEMENT_ASN1_FUNCTIONS(DIST_POINT)
339
340 ASN1_ITEM_TEMPLATE(CRL_DIST_POINTS) =
341 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, CRLDistributionPoints, DIST_POINT)
342 ASN1_ITEM_TEMPLATE_END(CRL_DIST_POINTS)
343
344 IMPLEMENT_ASN1_FUNCTIONS(CRL_DIST_POINTS)
345
346 ASN1_SEQUENCE(ISSUING_DIST_POINT) = {
347 ASN1_EXP_OPT(ISSUING_DIST_POINT, distpoint, DIST_POINT_NAME, 0),
348 ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyuser, ASN1_FBOOLEAN, 1),
349 ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyCA, ASN1_FBOOLEAN, 2),
350 ASN1_IMP_OPT(ISSUING_DIST_POINT, onlysomereasons, ASN1_BIT_STRING, 3),
351 ASN1_IMP_OPT(ISSUING_DIST_POINT, indirectCRL, ASN1_FBOOLEAN, 4),
352 ASN1_IMP_OPT(ISSUING_DIST_POINT, onlyattr, ASN1_FBOOLEAN, 5)
353 } ASN1_SEQUENCE_END(ISSUING_DIST_POINT)
354
355 IMPLEMENT_ASN1_FUNCTIONS(ISSUING_DIST_POINT)
356
357 static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out,
358 int indent);
359 static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
360 STACK_OF(CONF_VALUE) *nval);
361
362 const X509V3_EXT_METHOD ossl_v3_idp = {
363 NID_issuing_distribution_point, X509V3_EXT_MULTILINE,
364 ASN1_ITEM_ref(ISSUING_DIST_POINT),
365 0, 0, 0, 0,
366 0, 0,
367 0,
368 v2i_idp,
369 i2r_idp, 0,
370 NULL
371 };
372
v2i_idp(const X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* nval)373 static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
374 STACK_OF(CONF_VALUE) *nval)
375 {
376 ISSUING_DIST_POINT *idp = NULL;
377 CONF_VALUE *cnf;
378 char *name, *val;
379 int i, ret;
380 idp = ISSUING_DIST_POINT_new();
381 if (idp == NULL) {
382 ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
383 goto err;
384 }
385 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
386 cnf = sk_CONF_VALUE_value(nval, i);
387 name = cnf->name;
388 val = cnf->value;
389 ret = set_dist_point_name(&idp->distpoint, ctx, cnf);
390 if (ret > 0)
391 continue;
392 if (ret < 0)
393 goto err;
394 if (strcmp(name, "onlyuser") == 0) {
395 if (!X509V3_get_value_bool(cnf, &idp->onlyuser))
396 goto err;
397 } else if (strcmp(name, "onlyCA") == 0) {
398 if (!X509V3_get_value_bool(cnf, &idp->onlyCA))
399 goto err;
400 } else if (strcmp(name, "onlyAA") == 0) {
401 if (!X509V3_get_value_bool(cnf, &idp->onlyattr))
402 goto err;
403 } else if (strcmp(name, "indirectCRL") == 0) {
404 if (!X509V3_get_value_bool(cnf, &idp->indirectCRL))
405 goto err;
406 } else if (strcmp(name, "onlysomereasons") == 0) {
407 if (!set_reasons(&idp->onlysomereasons, val))
408 goto err;
409 } else {
410 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NAME);
411 X509V3_conf_add_error_name_value(cnf);
412 goto err;
413 }
414 }
415 return idp;
416
417 err:
418 ISSUING_DIST_POINT_free(idp);
419 return NULL;
420 }
421
print_distpoint(BIO * out,DIST_POINT_NAME * dpn,int indent)422 static int print_distpoint(BIO *out, DIST_POINT_NAME *dpn, int indent)
423 {
424 if (dpn->type == 0) {
425 BIO_printf(out, "%*sFull Name:\n", indent, "");
426 OSSL_GENERAL_NAMES_print(out, dpn->name.fullname, indent);
427 } else {
428 X509_NAME ntmp;
429 ntmp.entries = dpn->name.relativename;
430 BIO_printf(out, "%*sRelative Name:\n%*s", indent, "", indent + 2, "");
431 X509_NAME_print_ex(out, &ntmp, 0, XN_FLAG_ONELINE);
432 BIO_puts(out, "\n");
433 }
434 return 1;
435 }
436
i2r_idp(const X509V3_EXT_METHOD * method,void * pidp,BIO * out,int indent)437 static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out,
438 int indent)
439 {
440 ISSUING_DIST_POINT *idp = pidp;
441 if (idp->distpoint)
442 print_distpoint(out, idp->distpoint, indent);
443 if (idp->onlyuser > 0)
444 BIO_printf(out, "%*sOnly User Certificates\n", indent, "");
445 if (idp->onlyCA > 0)
446 BIO_printf(out, "%*sOnly CA Certificates\n", indent, "");
447 if (idp->indirectCRL > 0)
448 BIO_printf(out, "%*sIndirect CRL\n", indent, "");
449 if (idp->onlysomereasons)
450 print_reasons(out, "Only Some Reasons", idp->onlysomereasons, indent);
451 if (idp->onlyattr > 0)
452 BIO_printf(out, "%*sOnly Attribute Certificates\n", indent, "");
453 if (!idp->distpoint && (idp->onlyuser <= 0) && (idp->onlyCA <= 0)
454 && (idp->indirectCRL <= 0) && !idp->onlysomereasons
455 && (idp->onlyattr <= 0))
456 BIO_printf(out, "%*s<EMPTY>\n", indent, "");
457
458 return 1;
459 }
460
i2r_crldp(const X509V3_EXT_METHOD * method,void * pcrldp,BIO * out,int indent)461 static int i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out,
462 int indent)
463 {
464 STACK_OF(DIST_POINT) *crld = pcrldp;
465 DIST_POINT *point;
466 int i;
467 for (i = 0; i < sk_DIST_POINT_num(crld); i++) {
468 if (i > 0)
469 BIO_puts(out, "\n");
470 point = sk_DIST_POINT_value(crld, i);
471 if (point->distpoint)
472 print_distpoint(out, point->distpoint, indent);
473 if (point->reasons)
474 print_reasons(out, "Reasons", point->reasons, indent);
475 if (point->CRLissuer) {
476 BIO_printf(out, "%*sCRL Issuer:\n", indent, "");
477 OSSL_GENERAL_NAMES_print(out, point->CRLissuer, indent);
478 }
479 }
480 return 1;
481 }
482
483 /* Append any nameRelativeToCRLIssuer in dpn to iname, set in dpn->dpname */
DIST_POINT_set_dpname(DIST_POINT_NAME * dpn,const X509_NAME * iname)484 int DIST_POINT_set_dpname(DIST_POINT_NAME *dpn, const X509_NAME *iname)
485 {
486 int i;
487 STACK_OF(X509_NAME_ENTRY) *frag;
488 X509_NAME_ENTRY *ne;
489
490 if (dpn == NULL || dpn->type != 1)
491 return 1;
492 frag = dpn->name.relativename;
493 X509_NAME_free(dpn->dpname); /* just in case it was already set */
494 dpn->dpname = X509_NAME_dup(iname);
495 if (dpn->dpname == NULL)
496 return 0;
497 for (i = 0; i < sk_X509_NAME_ENTRY_num(frag); i++) {
498 ne = sk_X509_NAME_ENTRY_value(frag, i);
499 if (!X509_NAME_add_entry(dpn->dpname, ne, -1, i ? 0 : 1))
500 goto err;
501 }
502 /* generate cached encoding of name */
503 if (i2d_X509_NAME(dpn->dpname, NULL) >= 0)
504 return 1;
505
506 err:
507 X509_NAME_free(dpn->dpname);
508 dpn->dpname = NULL;
509 return 0;
510 }
511
