lib/libcrypto/x509v3/v3_pcons.c

   1 /* $OpenBSD: v3_pcons.c,v 1.11 2017/01/29 17:49:23 beck Exp $ */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2003 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include <string.h>
  61
  62 #include <openssl/asn1.h>
  63 #include <openssl/asn1t.h>
  64 #include <openssl/conf.h>
  65 #include <openssl/err.h>
  66 #include <openssl/x509v3.h>
  67
  68 static STACK_OF(CONF_VALUE) *
  69 i2v_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *bcons,
  70     STACK_OF(CONF_VALUE) *extlist);
  71 static void *v2i_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method,
  72     X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);
  73
  74 const X509V3_EXT_METHOD v3_policy_constraints = {
  75         .ext_nid = NID_policy_constraints,
  76         .ext_flags = 0,
  77         .it = &POLICY_CONSTRAINTS_it,
  78         .ext_new = NULL,
  79         .ext_free = NULL,
  80         .d2i = NULL,
  81         .i2d = NULL,
  82         .i2s = NULL,
  83         .s2i = NULL,
  84         .i2v = i2v_POLICY_CONSTRAINTS,
  85         .v2i = v2i_POLICY_CONSTRAINTS,
  86         .i2r = NULL,
  87         .r2i = NULL,
  88         .usr_data = NULL,
  89 };
  90
  91 static const ASN1_TEMPLATE POLICY_CONSTRAINTS_seq_tt[] = {
  92         {
  93                 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
  94                 .tag = 0,
  95                 .offset = offsetof(POLICY_CONSTRAINTS, requireExplicitPolicy),
  96                 .field_name = "requireExplicitPolicy",
  97                 .item = &ASN1_INTEGER_it,
  98         },
  99         {
 100                 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
 101                 .tag = 1,
 102                 .offset = offsetof(POLICY_CONSTRAINTS, inhibitPolicyMapping),
 103                 .field_name = "inhibitPolicyMapping",
 104                 .item = &ASN1_INTEGER_it,
 105         },
 106 };
 107
 108 const ASN1_ITEM POLICY_CONSTRAINTS_it = {
 109         .itype = ASN1_ITYPE_SEQUENCE,
 110         .utype = V_ASN1_SEQUENCE,
 111         .templates = POLICY_CONSTRAINTS_seq_tt,
 112         .tcount = sizeof(POLICY_CONSTRAINTS_seq_tt) / sizeof(ASN1_TEMPLATE),
 113         .funcs = NULL,
 114         .size = sizeof(POLICY_CONSTRAINTS),
 115         .sname = "POLICY_CONSTRAINTS",
 116 };
 117
 118
 119 POLICY_CONSTRAINTS *
 120 POLICY_CONSTRAINTS_new(void)
 121 {
 122         return (POLICY_CONSTRAINTS*)ASN1_item_new(&POLICY_CONSTRAINTS_it);
 123 }
 124
 125 void
 126 POLICY_CONSTRAINTS_free(POLICY_CONSTRAINTS *a)
 127 {
 128         ASN1_item_free((ASN1_VALUE *)a, &POLICY_CONSTRAINTS_it);
 129 }
 130
 131 static STACK_OF(CONF_VALUE) *
 132 i2v_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
 133     STACK_OF(CONF_VALUE) *extlist)
 134 {
 135         POLICY_CONSTRAINTS *pcons = a;
 136
 137         X509V3_add_value_int("Require Explicit Policy",
 138             pcons->requireExplicitPolicy, &extlist);
 139         X509V3_add_value_int("Inhibit Policy Mapping",
 140             pcons->inhibitPolicyMapping, &extlist);
 141         return extlist;
 142 }
 143
 144 static void *
 145 v2i_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
 146     STACK_OF(CONF_VALUE) *values)
 147 {
 148         POLICY_CONSTRAINTS *pcons = NULL;
 149         CONF_VALUE *val;
 150         int i;
 151
 152         if (!(pcons = POLICY_CONSTRAINTS_new())) {
 153                 X509V3error(ERR_R_MALLOC_FAILURE);
 154                 return NULL;
 155         }
 156         for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
 157                 val = sk_CONF_VALUE_value(values, i);
 158                 if (!strcmp(val->name, "requireExplicitPolicy")) {
 159                         if (!X509V3_get_value_int(val,
 160                             &pcons->requireExplicitPolicy)) goto err;
 161                 } else if (!strcmp(val->name, "inhibitPolicyMapping")) {
 162                         if (!X509V3_get_value_int(val,
 163                             &pcons->inhibitPolicyMapping)) goto err;
 164                 } else {
 165                         X509V3error(X509V3_R_INVALID_NAME);
 166                         X509V3_conf_err(val);
 167                         goto err;
 168                 }
 169         }
 170         if (!pcons->inhibitPolicyMapping && !pcons->requireExplicitPolicy) {
 171                 X509V3error(X509V3_R_ILLEGAL_EMPTY_EXTENSION);
 172                 goto err;
 173         }
 174
 175         return pcons;
 176
 177 err:
 178         POLICY_CONSTRAINTS_free(pcons);
 179         return NULL;
 180 }