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 static int v3_check_critical(const char **value);
21 static int v3_check_generic(const char **value);
22 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
23 int crit, const char *value);
24 static X509_EXTENSION *v3_generic_extension(const char *ext, const char *value,
27 static char *conf_lhash_get_string(void *db, const char *section, const char *value);
28 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, const char *section);
29 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
30 int ext_nid, int crit, void *ext_struc);
31 static unsigned char *generic_asn1(const char *value, X509V3_CTX *ctx,
34 static X509_EXTENSION *X509V3_EXT_nconf_int(CONF *conf, X509V3_CTX *ctx,
36 const char *name, const char *value)
42 crit = v3_check_critical(&value);
43 if ((ext_type = v3_check_generic(&value)))
44 return v3_generic_extension(name, value, crit, ext_type, ctx);
45 ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
47 X509V3err(0, X509V3_R_ERROR_IN_EXTENSION);
49 ERR_add_error_data(6, "section=", section,
50 ", name=", name, ", value=", value);
52 ERR_add_error_data(4, "name=", name, ", value=", value);
57 X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, const char *name,
60 return X509V3_EXT_nconf_int(conf, ctx, NULL, name, value);
63 X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,
69 crit = v3_check_critical(&value);
70 if ((ext_type = v3_check_generic(&value)))
71 return v3_generic_extension(OBJ_nid2sn(ext_nid),
72 value, crit, ext_type, ctx);
73 return do_ext_nconf(conf, ctx, ext_nid, crit, value);
76 /* CONF *conf: Config file */
77 /* char *value: Value */
78 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
79 int crit, const char *value)
81 const X509V3_EXT_METHOD *method;
83 STACK_OF(CONF_VALUE) *nval;
86 if (ext_nid == NID_undef) {
87 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION_NAME);
90 if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
91 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION);
94 /* Now get internal extension representation based on type */
97 nval = NCONF_get_section(conf, value + 1);
99 nval = X509V3_parse_list(value);
100 if (nval == NULL || sk_CONF_VALUE_num(nval) <= 0) {
101 X509V3err(X509V3_F_DO_EXT_NCONF,
102 X509V3_R_INVALID_EXTENSION_STRING);
103 ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=",
106 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
109 ext_struc = method->v2i(method, ctx, nval);
111 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
114 } else if (method->s2i) {
115 if ((ext_struc = method->s2i(method, ctx, value)) == NULL)
117 } else if (method->r2i) {
118 if (!ctx->db || !ctx->db_meth) {
119 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_NO_CONFIG_DATABASE);
122 if ((ext_struc = method->r2i(method, ctx, value)) == NULL)
125 X509V3err(X509V3_F_DO_EXT_NCONF,
126 X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
127 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
131 ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
133 ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
135 method->ext_free(ext_struc);
140 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
141 int ext_nid, int crit, void *ext_struc)
143 unsigned char *ext_der = NULL;
145 ASN1_OCTET_STRING *ext_oct = NULL;
148 /* Convert internal representation to DER */
152 ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
158 ext_len = method->i2d(ext_struc, NULL);
159 if ((ext_der = OPENSSL_malloc(ext_len)) == NULL)
162 method->i2d(ext_struc, &p);
164 if ((ext_oct = ASN1_OCTET_STRING_new()) == NULL)
166 ext_oct->data = ext_der;
168 ext_oct->length = ext_len;
170 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
173 ASN1_OCTET_STRING_free(ext_oct);
178 X509V3err(X509V3_F_DO_EXT_I2D, ERR_R_MALLOC_FAILURE);
179 OPENSSL_free(ext_der);
180 ASN1_OCTET_STRING_free(ext_oct);
185 /* Given an internal structure, nid and critical flag create an extension */
187 X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
189 const X509V3_EXT_METHOD *method;
191 if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
192 X509V3err(X509V3_F_X509V3_EXT_I2D, X509V3_R_UNKNOWN_EXTENSION);
195 return do_ext_i2d(method, ext_nid, crit, ext_struc);
198 /* Check the extension string for critical flag */
199 static int v3_check_critical(const char **value)
201 const char *p = *value;
203 if ((strlen(p) < 9) || strncmp(p, "critical,", 9))
206 while (ossl_isspace(*p))
212 /* Check extension string for generic extension and return the type */
213 static int v3_check_generic(const char **value)
216 const char *p = *value;
218 if ((strlen(p) >= 4) && strncmp(p, "DER:", 4) == 0) {
221 } else if ((strlen(p) >= 5) && strncmp(p, "ASN1:", 5) == 0) {
227 while (ossl_isspace(*p))
233 /* Create a generic extension: for now just handle DER type */
234 static X509_EXTENSION *v3_generic_extension(const char *ext, const char *value,
235 int crit, int gen_type,
238 unsigned char *ext_der = NULL;
240 ASN1_OBJECT *obj = NULL;
241 ASN1_OCTET_STRING *oct = NULL;
242 X509_EXTENSION *extension = NULL;
244 if ((obj = OBJ_txt2obj(ext, 0)) == NULL) {
245 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
246 X509V3_R_EXTENSION_NAME_ERROR);
247 ERR_add_error_data(2, "name=", ext);
252 ext_der = OPENSSL_hexstr2buf(value, &ext_len);
253 else if (gen_type == 2)
254 ext_der = generic_asn1(value, ctx, &ext_len);
256 if (ext_der == NULL) {
257 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
258 X509V3_R_EXTENSION_VALUE_ERROR);
259 ERR_add_error_data(2, "value=", value);
263 if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
264 X509V3err(X509V3_F_V3_GENERIC_EXTENSION, ERR_R_MALLOC_FAILURE);
269 oct->length = ext_len;
272 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
275 ASN1_OBJECT_free(obj);
276 ASN1_OCTET_STRING_free(oct);
277 OPENSSL_free(ext_der);
282 static unsigned char *generic_asn1(const char *value, X509V3_CTX *ctx,
286 unsigned char *ext_der = NULL;
288 typ = ASN1_generate_v3(value, ctx);
291 *ext_len = i2d_ASN1_TYPE(typ, &ext_der);
296 static void delete_ext(STACK_OF(X509_EXTENSION) *sk, X509_EXTENSION *dext)
301 obj = X509_EXTENSION_get_object(dext);
302 while ((idx = X509v3_get_ext_by_OBJ(sk, obj, -1)) >= 0) {
303 X509_EXTENSION *tmpext = X509v3_get_ext(sk, idx);
305 X509v3_delete_ext(sk, idx);
306 X509_EXTENSION_free(tmpext);
311 * This is the main function: add a bunch of extensions based on a config
312 * file section to an extension STACK.
315 int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, const char *section,
316 STACK_OF(X509_EXTENSION) **sk)
319 STACK_OF(CONF_VALUE) *nval;
323 if ((nval = NCONF_get_section(conf, section)) == NULL)
325 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
326 val = sk_CONF_VALUE_value(nval, i);
327 if ((ext = X509V3_EXT_nconf_int(conf, ctx, val->section,
328 val->name, val->value)) == NULL)
330 if (ctx->flags == X509V3_CTX_REPLACE)
331 delete_ext(*sk, ext);
333 if (X509v3_add_ext(sk, ext, -1) == NULL) {
334 X509_EXTENSION_free(ext);
338 X509_EXTENSION_free(ext);
344 * Convenience functions to add extensions to a certificate, CRL and request
347 int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
350 STACK_OF(X509_EXTENSION) **sk = NULL;
352 sk = &cert->cert_info.extensions;
353 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
356 /* Same as above but for a CRL */
358 int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
361 STACK_OF(X509_EXTENSION) **sk = NULL;
363 sk = &crl->crl.extensions;
364 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
367 /* Add extensions to certificate request */
369 int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
372 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
377 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
380 i = X509_REQ_add_extensions(req, extlist);
381 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
385 /* Config database functions */
387 char *X509V3_get_string(X509V3_CTX *ctx, const char *name, const char *section)
389 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) {
390 X509V3err(X509V3_F_X509V3_GET_STRING, X509V3_R_OPERATION_NOT_DEFINED);
393 if (ctx->db_meth->get_string)
394 return ctx->db_meth->get_string(ctx->db, name, section);
398 STACK_OF(CONF_VALUE) *X509V3_get_section(X509V3_CTX *ctx, const char *section)
400 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) {
401 X509V3err(X509V3_F_X509V3_GET_SECTION,
402 X509V3_R_OPERATION_NOT_DEFINED);
405 if (ctx->db_meth->get_section)
406 return ctx->db_meth->get_section(ctx->db, section);
410 void X509V3_string_free(X509V3_CTX *ctx, char *str)
414 if (ctx->db_meth->free_string)
415 ctx->db_meth->free_string(ctx->db, str);
418 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
422 if (ctx->db_meth->free_section)
423 ctx->db_meth->free_section(ctx->db, section);
426 static char *nconf_get_string(void *db, const char *section, const char *value)
428 return NCONF_get_string(db, section, value);
431 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, const char *section)
433 return NCONF_get_section(db, section);
436 static X509V3_CONF_METHOD nconf_method = {
443 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
445 ctx->db_meth = &nconf_method;
449 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
450 X509_CRL *crl, int flags)
452 ctx->issuer_cert = issuer;
453 ctx->subject_cert = subj;
455 ctx->subject_req = req;
459 /* Old conf compatibility functions */
461 X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
462 const char *name, const char *value)
466 CONF_set_nconf(&ctmp, conf);
467 return X509V3_EXT_nconf(&ctmp, ctx, name, value);
470 X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf,
471 X509V3_CTX *ctx, int ext_nid, const char *value)
474 CONF_set_nconf(&ctmp, conf);
475 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
478 static char *conf_lhash_get_string(void *db, const char *section, const char *value)
480 return CONF_get_string(db, section, value);
483 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, const char *section)
485 return CONF_get_section(db, section);
488 static X509V3_CONF_METHOD conf_lhash_method = {
489 conf_lhash_get_string,
490 conf_lhash_get_section,
495 void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash)
497 ctx->db_meth = &conf_lhash_method;
501 int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
502 const char *section, X509 *cert)
506 CONF_set_nconf(&ctmp, conf);
507 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
510 /* Same as above but for a CRL */
512 int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
513 const char *section, X509_CRL *crl)
517 CONF_set_nconf(&ctmp, conf);
518 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
521 /* Add extensions to certificate request */
523 int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
524 const char *section, X509_REQ *req)
528 CONF_set_nconf(&ctmp, conf);
529 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);