Use p==NULL not !p (in if statements, mainly)

[thirdparty/openssl.git] / crypto / x509v3 / v3_pmaps.c

/* v3_pmaps.c */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 2003 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).
 *
 */

#include <stdio.h>
#include "cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/conf.h>
#include <openssl/x509v3.h>

static void *v2i_POLICY_MAPPINGS(const X509V3_EXT_METHOD *method,
                                 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
static STACK_OF(CONF_VALUE) *i2v_POLICY_MAPPINGS(const X509V3_EXT_METHOD
                                                 *method, void *pmps, STACK_OF(CONF_VALUE)
                                                 *extlist);

const X509V3_EXT_METHOD v3_policy_mappings = {
    NID_policy_mappings, 0,
    ASN1_ITEM_ref(POLICY_MAPPINGS),
    0, 0, 0, 0,
    0, 0,
    i2v_POLICY_MAPPINGS,
    v2i_POLICY_MAPPINGS,
    0, 0,
    NULL
};

ASN1_SEQUENCE(POLICY_MAPPING) = {
        ASN1_SIMPLE(POLICY_MAPPING, issuerDomainPolicy, ASN1_OBJECT),
        ASN1_SIMPLE(POLICY_MAPPING, subjectDomainPolicy, ASN1_OBJECT)
} ASN1_SEQUENCE_END(POLICY_MAPPING)

ASN1_ITEM_TEMPLATE(POLICY_MAPPINGS) =
        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, POLICY_MAPPINGS,
                                                                POLICY_MAPPING)
ASN1_ITEM_TEMPLATE_END(POLICY_MAPPINGS)

IMPLEMENT_ASN1_ALLOC_FUNCTIONS(POLICY_MAPPING)

static STACK_OF(CONF_VALUE) *i2v_POLICY_MAPPINGS(const X509V3_EXT_METHOD
                                                 *method, void *a, STACK_OF(CONF_VALUE)
                                                 *ext_list)
{
    POLICY_MAPPINGS *pmaps = a;
    POLICY_MAPPING *pmap;
    int i;
    char obj_tmp1[80];
    char obj_tmp2[80];
    for (i = 0; i < sk_POLICY_MAPPING_num(pmaps); i++) {
        pmap = sk_POLICY_MAPPING_value(pmaps, i);
        i2t_ASN1_OBJECT(obj_tmp1, 80, pmap->issuerDomainPolicy);
        i2t_ASN1_OBJECT(obj_tmp2, 80, pmap->subjectDomainPolicy);
        X509V3_add_value(obj_tmp1, obj_tmp2, &ext_list);
    }
    return ext_list;
}

static void *v2i_POLICY_MAPPINGS(const X509V3_EXT_METHOD *method,
                                 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
{
    POLICY_MAPPINGS *pmaps;
    POLICY_MAPPING *pmap;
    ASN1_OBJECT *obj1, *obj2;
    CONF_VALUE *val;
    int i;

    if ((pmaps = sk_POLICY_MAPPING_new_null()) == NULL) {
        X509V3err(X509V3_F_V2I_POLICY_MAPPINGS, ERR_R_MALLOC_FAILURE);
        return NULL;
    }

    for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
        val = sk_CONF_VALUE_value(nval, i);
        if (!val->value || !val->name) {
            sk_POLICY_MAPPING_pop_free(pmaps, POLICY_MAPPING_free);
            X509V3err(X509V3_F_V2I_POLICY_MAPPINGS,
                      X509V3_R_INVALID_OBJECT_IDENTIFIER);
            X509V3_conf_err(val);
            return NULL;
        }
        obj1 = OBJ_txt2obj(val->name, 0);
        obj2 = OBJ_txt2obj(val->value, 0);
        if (!obj1 || !obj2) {
            sk_POLICY_MAPPING_pop_free(pmaps, POLICY_MAPPING_free);
            X509V3err(X509V3_F_V2I_POLICY_MAPPINGS,
                      X509V3_R_INVALID_OBJECT_IDENTIFIER);
            X509V3_conf_err(val);
            return NULL;
        }
        pmap = POLICY_MAPPING_new();
        if (!pmap) {
            sk_POLICY_MAPPING_pop_free(pmaps, POLICY_MAPPING_free);
            X509V3err(X509V3_F_V2I_POLICY_MAPPINGS, ERR_R_MALLOC_FAILURE);
            return NULL;
        }
        pmap->issuerDomainPolicy = obj1;
        pmap->subjectDomainPolicy = obj2;
        sk_POLICY_MAPPING_push(pmaps, pmap);
    }
    return pmaps;
}