/* v3_conf.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) 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(const 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)
{
const 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(const 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)
{
const 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_OF(CONF_VALUE) *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_OF(CONF_VALUE) *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_OF(CONF_VALUE) *lhash)
{
ctx->db_meth = &conf_lhash_method;
ctx->db = lhash;
}
int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *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_OF(CONF_VALUE) *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_OF(CONF_VALUE) *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);
}