v3_conf.c
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上传日期:2020-08-09
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- /* v3_conf.c */
- /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 1999.
- */
- /* ====================================================================
- * Copyright (c) 1999-2002 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
- /* extension creation utilities */
- #include <stdio.h>
- #include <ctype.h>
- #include "cryptlib.h"
- #include <openssl/conf.h>
- #include <openssl/x509.h>
- #include <openssl/x509v3.h>
- static int v3_check_critical(char **value);
- static int v3_check_generic(char **value);
- static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid, int crit, char *value);
- static X509_EXTENSION *v3_generic_extension(const char *ext, char *value, int crit, int type, X509V3_CTX *ctx);
- static char *conf_lhash_get_string(void *db, char *section, char *value);
- static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section);
- static X509_EXTENSION *do_ext_i2d(X509V3_EXT_METHOD *method, int ext_nid,
- int crit, void *ext_struc);
- static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, long *ext_len);
- /* CONF *conf: Config file */
- /* char *name: Name */
- /* char *value: Value */
- X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name,
- char *value)
- {
- int crit;
- int ext_type;
- X509_EXTENSION *ret;
- crit = v3_check_critical(&value);
- if ((ext_type = v3_check_generic(&value)))
- return v3_generic_extension(name, value, crit, ext_type, ctx);
- ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
- if (!ret)
- {
- X509V3err(X509V3_F_X509V3_EXT_NCONF,X509V3_R_ERROR_IN_EXTENSION);
- ERR_add_error_data(4,"name=", name, ", value=", value);
- }
- return ret;
- }
- /* CONF *conf: Config file */
- /* char *value: Value */
- X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,
- char *value)
- {
- int crit;
- int ext_type;
- crit = v3_check_critical(&value);
- if ((ext_type = v3_check_generic(&value)))
- return v3_generic_extension(OBJ_nid2sn(ext_nid),
- value, crit, ext_type, ctx);
- return do_ext_nconf(conf, ctx, ext_nid, crit, value);
- }
- /* CONF *conf: Config file */
- /* char *value: Value */
- static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
- int crit, char *value)
- {
- X509V3_EXT_METHOD *method;
- X509_EXTENSION *ext;
- STACK_OF(CONF_VALUE) *nval;
- void *ext_struc;
- if (ext_nid == NID_undef)
- {
- X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_UNKNOWN_EXTENSION_NAME);
- return NULL;
- }
- if (!(method = X509V3_EXT_get_nid(ext_nid)))
- {
- X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_UNKNOWN_EXTENSION);
- return NULL;
- }
- /* Now get internal extension representation based on type */
- if (method->v2i)
- {
- if(*value == '@') nval = NCONF_get_section(conf, value + 1);
- else nval = X509V3_parse_list(value);
- if(sk_CONF_VALUE_num(nval) <= 0)
- {
- X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_INVALID_EXTENSION_STRING);
- ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=", value);
- return NULL;
- }
- ext_struc = method->v2i(method, ctx, nval);
- if(*value != '@') sk_CONF_VALUE_pop_free(nval,
- X509V3_conf_free);
- if(!ext_struc) return NULL;
- }
- else if(method->s2i)
- {
- if(!(ext_struc = method->s2i(method, ctx, value))) return NULL;
- }
- else if(method->r2i)
- {
- if(!ctx->db || !ctx->db_meth)
- {
- X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_NO_CONFIG_DATABASE);
- return NULL;
- }
- if(!(ext_struc = method->r2i(method, ctx, value))) return NULL;
- }
- else
- {
- X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
- ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
- return NULL;
- }
- ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
- if(method->it) ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
- else method->ext_free(ext_struc);
- return ext;
- }
- static X509_EXTENSION *do_ext_i2d(X509V3_EXT_METHOD *method, int ext_nid,
- int crit, void *ext_struc)
- {
- unsigned char *ext_der;
- int ext_len;
- ASN1_OCTET_STRING *ext_oct;
- X509_EXTENSION *ext;
- /* Convert internal representation to DER */
- if (method->it)
- {
- ext_der = NULL;
- ext_len = ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
- if (ext_len < 0) goto merr;
- }
- else
- {
- unsigned char *p;
- ext_len = method->i2d(ext_struc, NULL);
- if(!(ext_der = OPENSSL_malloc(ext_len))) goto merr;
- p = ext_der;
- method->i2d(ext_struc, &p);
- }
- if (!(ext_oct = M_ASN1_OCTET_STRING_new())) goto merr;
- ext_oct->data = ext_der;
- ext_oct->length = ext_len;
- ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
- if (!ext) goto merr;
- M_ASN1_OCTET_STRING_free(ext_oct);
- return ext;
- merr:
- X509V3err(X509V3_F_DO_EXT_I2D,ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- /* Given an internal structure, nid and critical flag create an extension */
- X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
- {
- X509V3_EXT_METHOD *method;
- if (!(method = X509V3_EXT_get_nid(ext_nid))) {
- X509V3err(X509V3_F_X509V3_EXT_I2D,X509V3_R_UNKNOWN_EXTENSION);
- return NULL;
- }
- return do_ext_i2d(method, ext_nid, crit, ext_struc);
- }
- /* Check the extension string for critical flag */
- static int v3_check_critical(char **value)
- {
- char *p = *value;
- if ((strlen(p) < 9) || strncmp(p, "critical,", 9)) return 0;
- p+=9;
- while(isspace((unsigned char)*p)) p++;
- *value = p;
- return 1;
- }
- /* Check extension string for generic extension and return the type */
- static int v3_check_generic(char **value)
- {
- int gen_type = 0;
- char *p = *value;
- if ((strlen(p) >= 4) && !strncmp(p, "DER:", 4))
- {
- p+=4;
- gen_type = 1;
- }
- else if ((strlen(p) >= 5) && !strncmp(p, "ASN1:", 5))
- {
- p+=5;
- gen_type = 2;
- }
- else
- return 0;
- while (isspace((unsigned char)*p)) p++;
- *value = p;
- return gen_type;
- }
- /* Create a generic extension: for now just handle DER type */
- static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
- int crit, int gen_type, X509V3_CTX *ctx)
- {
- unsigned char *ext_der=NULL;
- long ext_len;
- ASN1_OBJECT *obj=NULL;
- ASN1_OCTET_STRING *oct=NULL;
- X509_EXTENSION *extension=NULL;
- if (!(obj = OBJ_txt2obj(ext, 0)))
- {
- X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_NAME_ERROR);
- ERR_add_error_data(2, "name=", ext);
- goto err;
- }
- if (gen_type == 1)
- ext_der = string_to_hex(value, &ext_len);
- else if (gen_type == 2)
- ext_der = generic_asn1(value, ctx, &ext_len);
- if (ext_der == NULL)
- {
- X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_VALUE_ERROR);
- ERR_add_error_data(2, "value=", value);
- goto err;
- }
- if (!(oct = M_ASN1_OCTET_STRING_new()))
- {
- X509V3err(X509V3_F_V3_GENERIC_EXTENSION,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- oct->data = ext_der;
- oct->length = ext_len;
- ext_der = NULL;
- extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
- err:
- ASN1_OBJECT_free(obj);
- M_ASN1_OCTET_STRING_free(oct);
- if(ext_der) OPENSSL_free(ext_der);
- return extension;
- }
- static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, long *ext_len)
- {
- ASN1_TYPE *typ;
- unsigned char *ext_der = NULL;
- typ = ASN1_generate_v3(value, ctx);
- if (typ == NULL)
- return NULL;
- *ext_len = i2d_ASN1_TYPE(typ, &ext_der);
- ASN1_TYPE_free(typ);
- return ext_der;
- }
- /* This is the main function: add a bunch of extensions based on a config file
- * section to an extension STACK.
- */
- int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section,
- STACK_OF(X509_EXTENSION) **sk)
- {
- X509_EXTENSION *ext;
- STACK_OF(CONF_VALUE) *nval;
- CONF_VALUE *val;
- int i;
- if (!(nval = NCONF_get_section(conf, section))) return 0;
- for (i = 0; i < sk_CONF_VALUE_num(nval); i++)
- {
- val = sk_CONF_VALUE_value(nval, i);
- if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)))
- return 0;
- if (sk) X509v3_add_ext(sk, ext, -1);
- X509_EXTENSION_free(ext);
- }
- return 1;
- }
- /* Convenience functions to add extensions to a certificate, CRL and request */
- int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
- X509 *cert)
- {
- STACK_OF(X509_EXTENSION) **sk = NULL;
- if (cert)
- sk = &cert->cert_info->extensions;
- return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
- }
- /* Same as above but for a CRL */
- int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
- X509_CRL *crl)
- {
- STACK_OF(X509_EXTENSION) **sk = NULL;
- if (crl)
- sk = &crl->crl->extensions;
- return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
- }
- /* Add extensions to certificate request */
- int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
- X509_REQ *req)
- {
- STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
- int i;
- if (req)
- sk = &extlist;
- i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
- if (!i || !sk)
- return i;
- i = X509_REQ_add_extensions(req, extlist);
- sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
- return i;
- }
- /* Config database functions */
- char * X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)
- {
- if(!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string)
- {
- X509V3err(X509V3_F_X509V3_GET_STRING,X509V3_R_OPERATION_NOT_DEFINED);
- return NULL;
- }
- if (ctx->db_meth->get_string)
- return ctx->db_meth->get_string(ctx->db, name, section);
- return NULL;
- }
- STACK_OF(CONF_VALUE) * X509V3_get_section(X509V3_CTX *ctx, char *section)
- {
- if(!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section)
- {
- X509V3err(X509V3_F_X509V3_GET_SECTION,X509V3_R_OPERATION_NOT_DEFINED);
- return NULL;
- }
- if (ctx->db_meth->get_section)
- return ctx->db_meth->get_section(ctx->db, section);
- return NULL;
- }
- void X509V3_string_free(X509V3_CTX *ctx, char *str)
- {
- if (!str) return;
- if (ctx->db_meth->free_string)
- ctx->db_meth->free_string(ctx->db, str);
- }
- void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
- {
- if (!section) return;
- if (ctx->db_meth->free_section)
- ctx->db_meth->free_section(ctx->db, section);
- }
- static char *nconf_get_string(void *db, char *section, char *value)
- {
- return NCONF_get_string(db, section, value);
- }
- static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)
- {
- return NCONF_get_section(db, section);
- }
- static X509V3_CONF_METHOD nconf_method = {
- nconf_get_string,
- nconf_get_section,
- NULL,
- NULL
- };
- void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
- {
- ctx->db_meth = &nconf_method;
- ctx->db = conf;
- }
- void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
- X509_CRL *crl, int flags)
- {
- ctx->issuer_cert = issuer;
- ctx->subject_cert = subj;
- ctx->crl = crl;
- ctx->subject_req = req;
- ctx->flags = flags;
- }
- /* Old conf compatibility functions */
- X509_EXTENSION *X509V3_EXT_conf(LHASH *conf, X509V3_CTX *ctx, char *name,
- char *value)
- {
- CONF ctmp;
- CONF_set_nconf(&ctmp, conf);
- return X509V3_EXT_nconf(&ctmp, ctx, name, value);
- }
- /* LHASH *conf: Config file */
- /* char *value: Value */
- X509_EXTENSION *X509V3_EXT_conf_nid(LHASH *conf, X509V3_CTX *ctx, int ext_nid,
- char *value)
- {
- CONF ctmp;
- CONF_set_nconf(&ctmp, conf);
- return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
- }
- static char *conf_lhash_get_string(void *db, char *section, char *value)
- {
- return CONF_get_string(db, section, value);
- }
- static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)
- {
- return CONF_get_section(db, section);
- }
- static X509V3_CONF_METHOD conf_lhash_method = {
- conf_lhash_get_string,
- conf_lhash_get_section,
- NULL,
- NULL
- };
- void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH *lhash)
- {
- ctx->db_meth = &conf_lhash_method;
- ctx->db = lhash;
- }
- int X509V3_EXT_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,
- X509 *cert)
- {
- CONF ctmp;
- CONF_set_nconf(&ctmp, conf);
- return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
- }
- /* Same as above but for a CRL */
- int X509V3_EXT_CRL_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,
- X509_CRL *crl)
- {
- CONF ctmp;
- CONF_set_nconf(&ctmp, conf);
- return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
- }
- /* Add extensions to certificate request */
- int X509V3_EXT_REQ_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,
- X509_REQ *req)
- {
- CONF ctmp;
- CONF_set_nconf(&ctmp, conf);
- return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);
- }