2 * Copyright 1999-2020 The OpenSSL Project Authors. All Rights Reserved.
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
10 /* extension creation utilities */
13 #include "crypto/ctype.h"
14 #include "internal/cryptlib.h"
15 #include <openssl/conf.h>
16 #include <openssl/x509.h>
17 #include "crypto/x509.h"
18 #include <openssl/x509v3.h>
20 DEFINE_STACK_OF(CONF_VALUE)
22 static int v3_check_critical(const char **value);
23 static int v3_check_generic(const char **value);
24 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
25 int crit, const char *value);
26 static X509_EXTENSION *v3_generic_extension(const char *ext, const char *value,
29 static char *conf_lhash_get_string(void *db, const char *section, const char *value);
30 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, const char *section);
31 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
32 int ext_nid, int crit, void *ext_struc);
33 static unsigned char *generic_asn1(const char *value, X509V3_CTX *ctx,
36 static X509_EXTENSION *X509V3_EXT_nconf_int(CONF *conf, X509V3_CTX *ctx,
38 const char *name, const char *value)
44 crit = v3_check_critical(&value);
45 if ((ext_type = v3_check_generic(&value)))
46 return v3_generic_extension(name, value, crit, ext_type, ctx);
47 ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
49 X509V3err(0, X509V3_R_ERROR_IN_EXTENSION);
51 ERR_add_error_data(6, "section=", section,
52 ", name=", name, ", value=", value);
54 ERR_add_error_data(4, "name=", name, ", value=", value);
59 X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, const char *name,
62 return X509V3_EXT_nconf_int(conf, ctx, NULL, name, value);
65 X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,
71 crit = v3_check_critical(&value);
72 if ((ext_type = v3_check_generic(&value)))
73 return v3_generic_extension(OBJ_nid2sn(ext_nid),
74 value, crit, ext_type, ctx);
75 return do_ext_nconf(conf, ctx, ext_nid, crit, value);
78 /* CONF *conf: Config file */
79 /* char *value: Value */
80 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
81 int crit, const char *value)
83 const X509V3_EXT_METHOD *method;
85 STACK_OF(CONF_VALUE) *nval;
88 if (ext_nid == NID_undef) {
89 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION_NAME);
92 if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
93 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION);
96 /* Now get internal extension representation based on type */
99 nval = NCONF_get_section(conf, value + 1);
101 nval = X509V3_parse_list(value);
102 if (nval == NULL || sk_CONF_VALUE_num(nval) <= 0) {
103 X509V3err(X509V3_F_DO_EXT_NCONF,
104 X509V3_R_INVALID_EXTENSION_STRING);
105 ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=",
108 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
111 ext_struc = method->v2i(method, ctx, nval);
113 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
116 } else if (method->s2i) {
117 if ((ext_struc = method->s2i(method, ctx, value)) == NULL)
119 } else if (method->r2i) {
120 if (!ctx->db || !ctx->db_meth) {
121 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_NO_CONFIG_DATABASE);
124 if ((ext_struc = method->r2i(method, ctx, value)) == NULL)
127 X509V3err(X509V3_F_DO_EXT_NCONF,
128 X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
129 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
133 ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
135 ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
137 method->ext_free(ext_struc);
142 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
143 int ext_nid, int crit, void *ext_struc)
145 unsigned char *ext_der = NULL;
147 ASN1_OCTET_STRING *ext_oct = NULL;
150 /* Convert internal representation to DER */
154 ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
160 ext_len = method->i2d(ext_struc, NULL);
161 if ((ext_der = OPENSSL_malloc(ext_len)) == NULL)
164 method->i2d(ext_struc, &p);
166 if ((ext_oct = ASN1_OCTET_STRING_new()) == NULL)
168 ext_oct->data = ext_der;
170 ext_oct->length = ext_len;
172 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
175 ASN1_OCTET_STRING_free(ext_oct);
180 X509V3err(X509V3_F_DO_EXT_I2D, ERR_R_MALLOC_FAILURE);
181 OPENSSL_free(ext_der);
182 ASN1_OCTET_STRING_free(ext_oct);
187 /* Given an internal structure, nid and critical flag create an extension */
189 X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
191 const X509V3_EXT_METHOD *method;
193 if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
194 X509V3err(X509V3_F_X509V3_EXT_I2D, X509V3_R_UNKNOWN_EXTENSION);
197 return do_ext_i2d(method, ext_nid, crit, ext_struc);
200 /* Check the extension string for critical flag */
201 static int v3_check_critical(const char **value)
203 const char *p = *value;
205 if ((strlen(p) < 9) || strncmp(p, "critical,", 9))
208 while (ossl_isspace(*p))
214 /* Check extension string for generic extension and return the type */
215 static int v3_check_generic(const char **value)
218 const char *p = *value;
220 if ((strlen(p) >= 4) && strncmp(p, "DER:", 4) == 0) {
223 } else if ((strlen(p) >= 5) && strncmp(p, "ASN1:", 5) == 0) {
229 while (ossl_isspace(*p))
235 /* Create a generic extension: for now just handle DER type */
236 static X509_EXTENSION *v3_generic_extension(const char *ext, const char *value,
237 int crit, int gen_type,
240 unsigned char *ext_der = NULL;
242 ASN1_OBJECT *obj = NULL;
243 ASN1_OCTET_STRING *oct = NULL;
244 X509_EXTENSION *extension = NULL;
246 if ((obj = OBJ_txt2obj(ext, 0)) == NULL) {
247 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
248 X509V3_R_EXTENSION_NAME_ERROR);
249 ERR_add_error_data(2, "name=", ext);
254 ext_der = OPENSSL_hexstr2buf(value, &ext_len);
255 else if (gen_type == 2)
256 ext_der = generic_asn1(value, ctx, &ext_len);
258 if (ext_der == NULL) {
259 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
260 X509V3_R_EXTENSION_VALUE_ERROR);
261 ERR_add_error_data(2, "value=", value);
265 if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
266 X509V3err(X509V3_F_V3_GENERIC_EXTENSION, ERR_R_MALLOC_FAILURE);
271 oct->length = ext_len;
274 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
277 ASN1_OBJECT_free(obj);
278 ASN1_OCTET_STRING_free(oct);
279 OPENSSL_free(ext_der);
284 static unsigned char *generic_asn1(const char *value, X509V3_CTX *ctx,
288 unsigned char *ext_der = NULL;
290 typ = ASN1_generate_v3(value, ctx);
293 *ext_len = i2d_ASN1_TYPE(typ, &ext_der);
298 static void delete_ext(STACK_OF(X509_EXTENSION) *sk, X509_EXTENSION *dext)
303 obj = X509_EXTENSION_get_object(dext);
304 while ((idx = X509v3_get_ext_by_OBJ(sk, obj, -1)) >= 0) {
305 X509_EXTENSION *tmpext = X509v3_get_ext(sk, idx);
307 X509v3_delete_ext(sk, idx);
308 X509_EXTENSION_free(tmpext);
313 * This is the main function: add a bunch of extensions based on a config
314 * file section to an extension STACK.
317 int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, const char *section,
318 STACK_OF(X509_EXTENSION) **sk)
321 STACK_OF(CONF_VALUE) *nval;
325 if ((nval = NCONF_get_section(conf, section)) == NULL)
327 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
328 val = sk_CONF_VALUE_value(nval, i);
329 if ((ext = X509V3_EXT_nconf_int(conf, ctx, val->section,
330 val->name, val->value)) == NULL)
332 if (ctx->flags == X509V3_CTX_REPLACE)
333 delete_ext(*sk, ext);
335 if (X509v3_add_ext(sk, ext, -1) == NULL) {
336 X509_EXTENSION_free(ext);
340 X509_EXTENSION_free(ext);
346 * Convenience functions to add extensions to a certificate, CRL and request
349 int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
352 STACK_OF(X509_EXTENSION) **sk = NULL;
354 sk = &cert->cert_info.extensions;
355 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
358 /* Same as above but for a CRL */
360 int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
363 STACK_OF(X509_EXTENSION) **sk = NULL;
365 sk = &crl->crl.extensions;
366 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
369 /* Add extensions to certificate request */
371 int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
374 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
379 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
382 i = X509_REQ_add_extensions(req, extlist);
383 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
387 /* Config database functions */
389 char *X509V3_get_string(X509V3_CTX *ctx, const char *name, const char *section)
391 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) {
392 X509V3err(X509V3_F_X509V3_GET_STRING, X509V3_R_OPERATION_NOT_DEFINED);
395 if (ctx->db_meth->get_string)
396 return ctx->db_meth->get_string(ctx->db, name, section);
400 STACK_OF(CONF_VALUE) *X509V3_get_section(X509V3_CTX *ctx, const char *section)
402 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) {
403 X509V3err(X509V3_F_X509V3_GET_SECTION,
404 X509V3_R_OPERATION_NOT_DEFINED);
407 if (ctx->db_meth->get_section)
408 return ctx->db_meth->get_section(ctx->db, section);
412 void X509V3_string_free(X509V3_CTX *ctx, char *str)
416 if (ctx->db_meth->free_string)
417 ctx->db_meth->free_string(ctx->db, str);
420 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
424 if (ctx->db_meth->free_section)
425 ctx->db_meth->free_section(ctx->db, section);
428 static char *nconf_get_string(void *db, const char *section, const char *value)
430 return NCONF_get_string(db, section, value);
433 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, const char *section)
435 return NCONF_get_section(db, section);
438 static X509V3_CONF_METHOD nconf_method = {
445 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
447 ctx->db_meth = &nconf_method;
451 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
452 X509_CRL *crl, int flags)
454 ctx->issuer_cert = issuer;
455 ctx->subject_cert = subj;
457 ctx->subject_req = req;
461 /* Old conf compatibility functions */
463 X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
464 const char *name, const char *value)
468 CONF_set_nconf(&ctmp, conf);
469 return X509V3_EXT_nconf(&ctmp, ctx, name, value);
472 X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf,
473 X509V3_CTX *ctx, int ext_nid, const char *value)
476 CONF_set_nconf(&ctmp, conf);
477 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
480 static char *conf_lhash_get_string(void *db, const char *section, const char *value)
482 return CONF_get_string(db, section, value);
485 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, const char *section)
487 return CONF_get_section(db, section);
490 static X509V3_CONF_METHOD conf_lhash_method = {
491 conf_lhash_get_string,
492 conf_lhash_get_section,
497 void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash)
499 ctx->db_meth = &conf_lhash_method;
503 int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
504 const char *section, X509 *cert)
508 CONF_set_nconf(&ctmp, conf);
509 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
512 /* Same as above but for a CRL */
514 int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
515 const char *section, X509_CRL *crl)
519 CONF_set_nconf(&ctmp, conf);
520 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
523 /* Add extensions to certificate request */
525 int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
526 const char *section, X509_REQ *req)
530 CONF_set_nconf(&ctmp, conf);
531 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);