MFC:

[dragonfly.git] / crypto / openssl-0.9 / crypto / x509v3 / v3_conf.c

/* 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);
        }