[331] | 1 | /*
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| 2 | * Copyright 2003-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include "internal/asn1_int.h"
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| 13 | #include <openssl/asn1t.h>
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| 14 | #include <openssl/conf.h>
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| 15 | #include <openssl/x509v3.h>
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| 16 |
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| 17 | #include "internal/x509_int.h"
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| 18 | #include "ext_dat.h"
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| 19 |
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| 20 | static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
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| 21 | X509V3_CTX *ctx,
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| 22 | STACK_OF(CONF_VALUE) *nval);
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| 23 | static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
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| 24 | BIO *bp, int ind);
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| 25 | static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
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| 26 | STACK_OF(GENERAL_SUBTREE) *trees, BIO *bp,
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| 27 | int ind, const char *name);
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| 28 | static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip);
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| 29 |
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| 30 | static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc);
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| 31 | static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen);
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| 32 | static int nc_dn(X509_NAME *sub, X509_NAME *nm);
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| 33 | static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns);
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| 34 | static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml);
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| 35 | static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base);
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| 36 | static int nc_ip(ASN1_OCTET_STRING *ip, ASN1_OCTET_STRING *base);
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| 37 |
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| 38 | const X509V3_EXT_METHOD v3_name_constraints = {
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| 39 | NID_name_constraints, 0,
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| 40 | ASN1_ITEM_ref(NAME_CONSTRAINTS),
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| 41 | 0, 0, 0, 0,
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| 42 | 0, 0,
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| 43 | 0, v2i_NAME_CONSTRAINTS,
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| 44 | i2r_NAME_CONSTRAINTS, 0,
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| 45 | NULL
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| 46 | };
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| 47 |
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| 48 | ASN1_SEQUENCE(GENERAL_SUBTREE) = {
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| 49 | ASN1_SIMPLE(GENERAL_SUBTREE, base, GENERAL_NAME),
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| 50 | ASN1_IMP_OPT(GENERAL_SUBTREE, minimum, ASN1_INTEGER, 0),
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| 51 | ASN1_IMP_OPT(GENERAL_SUBTREE, maximum, ASN1_INTEGER, 1)
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| 52 | } ASN1_SEQUENCE_END(GENERAL_SUBTREE)
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| 53 |
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| 54 | ASN1_SEQUENCE(NAME_CONSTRAINTS) = {
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| 55 | ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, permittedSubtrees,
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| 56 | GENERAL_SUBTREE, 0),
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| 57 | ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, excludedSubtrees,
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| 58 | GENERAL_SUBTREE, 1),
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| 59 | } ASN1_SEQUENCE_END(NAME_CONSTRAINTS)
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| 60 |
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| 61 |
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| 62 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(GENERAL_SUBTREE)
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| 63 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(NAME_CONSTRAINTS)
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| 64 |
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| 65 | static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
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| 66 | X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
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| 67 | {
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| 68 | int i;
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| 69 | CONF_VALUE tval, *val;
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| 70 | STACK_OF(GENERAL_SUBTREE) **ptree = NULL;
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| 71 | NAME_CONSTRAINTS *ncons = NULL;
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| 72 | GENERAL_SUBTREE *sub = NULL;
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| 73 |
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| 74 | ncons = NAME_CONSTRAINTS_new();
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| 75 | if (ncons == NULL)
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| 76 | goto memerr;
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| 77 | for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
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| 78 | val = sk_CONF_VALUE_value(nval, i);
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| 79 | if (strncmp(val->name, "permitted", 9) == 0 && val->name[9]) {
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| 80 | ptree = &ncons->permittedSubtrees;
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| 81 | tval.name = val->name + 10;
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| 82 | } else if (strncmp(val->name, "excluded", 8) == 0 && val->name[8]) {
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| 83 | ptree = &ncons->excludedSubtrees;
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| 84 | tval.name = val->name + 9;
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| 85 | } else {
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| 86 | X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, X509V3_R_INVALID_SYNTAX);
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| 87 | goto err;
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| 88 | }
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| 89 | tval.value = val->value;
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| 90 | sub = GENERAL_SUBTREE_new();
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| 91 | if (sub == NULL)
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| 92 | goto memerr;
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| 93 | if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1))
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| 94 | goto err;
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| 95 | if (*ptree == NULL)
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| 96 | *ptree = sk_GENERAL_SUBTREE_new_null();
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| 97 | if (*ptree == NULL || !sk_GENERAL_SUBTREE_push(*ptree, sub))
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| 98 | goto memerr;
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| 99 | sub = NULL;
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| 100 | }
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| 101 |
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| 102 | return ncons;
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| 103 |
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| 104 | memerr:
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| 105 | X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, ERR_R_MALLOC_FAILURE);
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| 106 | err:
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| 107 | NAME_CONSTRAINTS_free(ncons);
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| 108 | GENERAL_SUBTREE_free(sub);
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| 109 |
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| 110 | return NULL;
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| 111 | }
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| 112 |
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| 113 | static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
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| 114 | BIO *bp, int ind)
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| 115 | {
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| 116 | NAME_CONSTRAINTS *ncons = a;
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| 117 | do_i2r_name_constraints(method, ncons->permittedSubtrees,
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| 118 | bp, ind, "Permitted");
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| 119 | do_i2r_name_constraints(method, ncons->excludedSubtrees,
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| 120 | bp, ind, "Excluded");
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| 121 | return 1;
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| 122 | }
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| 123 |
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| 124 | static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
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| 125 | STACK_OF(GENERAL_SUBTREE) *trees,
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| 126 | BIO *bp, int ind, const char *name)
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| 127 | {
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| 128 | GENERAL_SUBTREE *tree;
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| 129 | int i;
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| 130 | if (sk_GENERAL_SUBTREE_num(trees) > 0)
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| 131 | BIO_printf(bp, "%*s%s:\n", ind, "", name);
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| 132 | for (i = 0; i < sk_GENERAL_SUBTREE_num(trees); i++) {
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| 133 | tree = sk_GENERAL_SUBTREE_value(trees, i);
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| 134 | BIO_printf(bp, "%*s", ind + 2, "");
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| 135 | if (tree->base->type == GEN_IPADD)
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| 136 | print_nc_ipadd(bp, tree->base->d.ip);
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| 137 | else
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| 138 | GENERAL_NAME_print(bp, tree->base);
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| 139 | BIO_puts(bp, "\n");
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| 140 | }
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| 141 | return 1;
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| 142 | }
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| 143 |
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| 144 | static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip)
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| 145 | {
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| 146 | int i, len;
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| 147 | unsigned char *p;
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| 148 | p = ip->data;
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| 149 | len = ip->length;
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| 150 | BIO_puts(bp, "IP:");
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| 151 | if (len == 8) {
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| 152 | BIO_printf(bp, "%d.%d.%d.%d/%d.%d.%d.%d",
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| 153 | p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
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| 154 | } else if (len == 32) {
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| 155 | for (i = 0; i < 16; i++) {
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| 156 | BIO_printf(bp, "%X", p[0] << 8 | p[1]);
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| 157 | p += 2;
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| 158 | if (i == 7)
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| 159 | BIO_puts(bp, "/");
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| 160 | else if (i != 15)
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| 161 | BIO_puts(bp, ":");
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| 162 | }
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| 163 | } else
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| 164 | BIO_printf(bp, "IP Address:<invalid>");
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| 165 | return 1;
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| 166 | }
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| 167 |
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| 168 | /*-
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| 169 | * Check a certificate conforms to a specified set of constraints.
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| 170 | * Return values:
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| 171 | * X509_V_OK: All constraints obeyed.
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| 172 | * X509_V_ERR_PERMITTED_VIOLATION: Permitted subtree violation.
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| 173 | * X509_V_ERR_EXCLUDED_VIOLATION: Excluded subtree violation.
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| 174 | * X509_V_ERR_SUBTREE_MINMAX: Min or max values present and matching type.
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| 175 | * X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: Unsupported constraint type.
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| 176 | * X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: bad unsupported constraint syntax.
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| 177 | * X509_V_ERR_UNSUPPORTED_NAME_SYNTAX: bad or unsupported syntax of name
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| 178 | */
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| 179 |
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| 180 | int NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc)
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| 181 | {
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| 182 | int r, i;
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| 183 | X509_NAME *nm;
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| 184 |
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| 185 | nm = X509_get_subject_name(x);
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| 186 |
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| 187 | if (X509_NAME_entry_count(nm) > 0) {
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| 188 | GENERAL_NAME gntmp;
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| 189 | gntmp.type = GEN_DIRNAME;
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| 190 | gntmp.d.directoryName = nm;
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| 191 |
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| 192 | r = nc_match(&gntmp, nc);
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| 193 |
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| 194 | if (r != X509_V_OK)
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| 195 | return r;
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| 196 |
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| 197 | gntmp.type = GEN_EMAIL;
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| 198 |
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| 199 | /* Process any email address attributes in subject name */
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| 200 |
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| 201 | for (i = -1;;) {
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| 202 | const X509_NAME_ENTRY *ne;
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| 203 |
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| 204 | i = X509_NAME_get_index_by_NID(nm, NID_pkcs9_emailAddress, i);
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| 205 | if (i == -1)
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| 206 | break;
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| 207 | ne = X509_NAME_get_entry(nm, i);
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| 208 | gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne);
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| 209 | if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING)
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| 210 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
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| 211 |
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| 212 | r = nc_match(&gntmp, nc);
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| 213 |
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| 214 | if (r != X509_V_OK)
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| 215 | return r;
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| 216 | }
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| 217 |
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| 218 | }
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| 219 |
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| 220 | for (i = 0; i < sk_GENERAL_NAME_num(x->altname); i++) {
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| 221 | GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, i);
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| 222 | r = nc_match(gen, nc);
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| 223 | if (r != X509_V_OK)
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| 224 | return r;
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| 225 | }
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| 226 |
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| 227 | return X509_V_OK;
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| 228 |
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| 229 | }
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| 230 |
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| 231 | int NAME_CONSTRAINTS_check_CN(X509 *x, NAME_CONSTRAINTS *nc)
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| 232 | {
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| 233 | int r, i;
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| 234 | X509_NAME *nm;
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| 235 |
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| 236 | ASN1_STRING stmp;
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| 237 | GENERAL_NAME gntmp;
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| 238 | stmp.flags = 0;
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| 239 | stmp.type = V_ASN1_IA5STRING;
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| 240 | gntmp.type = GEN_DNS;
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| 241 | gntmp.d.dNSName = &stmp;
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| 242 |
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| 243 | nm = X509_get_subject_name(x);
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| 244 |
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| 245 | /* Process any commonName attributes in subject name */
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| 246 |
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| 247 | for (i = -1;;) {
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| 248 | X509_NAME_ENTRY *ne;
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| 249 | ASN1_STRING *hn;
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| 250 | i = X509_NAME_get_index_by_NID(nm, NID_commonName, i);
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| 251 | if (i == -1)
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| 252 | break;
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| 253 | ne = X509_NAME_get_entry(nm, i);
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| 254 | hn = X509_NAME_ENTRY_get_data(ne);
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| 255 | /* Only process attributes that look like host names */
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| 256 | if (asn1_valid_host(hn)) {
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| 257 | unsigned char *h;
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| 258 | int hlen = ASN1_STRING_to_UTF8(&h, hn);
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| 259 | if (hlen <= 0)
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| 260 | return X509_V_ERR_OUT_OF_MEM;
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| 261 |
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| 262 | stmp.length = hlen;
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| 263 | stmp.data = h;
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| 264 |
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| 265 | r = nc_match(&gntmp, nc);
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| 266 |
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| 267 | OPENSSL_free(h);
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| 268 |
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| 269 | if (r != X509_V_OK)
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| 270 | return r;
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| 271 | }
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| 272 | }
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| 273 | return X509_V_OK;
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| 274 | }
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| 275 |
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| 276 | static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc)
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| 277 | {
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| 278 | GENERAL_SUBTREE *sub;
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| 279 | int i, r, match = 0;
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| 280 |
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| 281 | /*
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| 282 | * Permitted subtrees: if any subtrees exist of matching the type at
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| 283 | * least one subtree must match.
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| 284 | */
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| 285 |
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| 286 | for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees); i++) {
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| 287 | sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i);
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| 288 | if (gen->type != sub->base->type)
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| 289 | continue;
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| 290 | if (sub->minimum || sub->maximum)
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| 291 | return X509_V_ERR_SUBTREE_MINMAX;
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| 292 | /* If we already have a match don't bother trying any more */
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| 293 | if (match == 2)
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| 294 | continue;
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| 295 | if (match == 0)
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| 296 | match = 1;
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| 297 | r = nc_match_single(gen, sub->base);
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| 298 | if (r == X509_V_OK)
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| 299 | match = 2;
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| 300 | else if (r != X509_V_ERR_PERMITTED_VIOLATION)
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| 301 | return r;
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| 302 | }
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| 303 |
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| 304 | if (match == 1)
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| 305 | return X509_V_ERR_PERMITTED_VIOLATION;
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| 306 |
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| 307 | /* Excluded subtrees: must not match any of these */
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| 308 |
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| 309 | for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees); i++) {
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| 310 | sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i);
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| 311 | if (gen->type != sub->base->type)
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| 312 | continue;
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| 313 | if (sub->minimum || sub->maximum)
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| 314 | return X509_V_ERR_SUBTREE_MINMAX;
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| 315 |
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| 316 | r = nc_match_single(gen, sub->base);
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| 317 | if (r == X509_V_OK)
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| 318 | return X509_V_ERR_EXCLUDED_VIOLATION;
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| 319 | else if (r != X509_V_ERR_PERMITTED_VIOLATION)
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| 320 | return r;
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| 321 |
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| 322 | }
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| 323 |
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| 324 | return X509_V_OK;
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| 325 |
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| 326 | }
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| 327 |
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| 328 | static int nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base)
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| 329 | {
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| 330 | switch (base->type) {
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| 331 | case GEN_DIRNAME:
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| 332 | return nc_dn(gen->d.directoryName, base->d.directoryName);
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| 333 |
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| 334 | case GEN_DNS:
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| 335 | return nc_dns(gen->d.dNSName, base->d.dNSName);
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| 336 |
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| 337 | case GEN_EMAIL:
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| 338 | return nc_email(gen->d.rfc822Name, base->d.rfc822Name);
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| 339 |
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| 340 | case GEN_URI:
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| 341 | return nc_uri(gen->d.uniformResourceIdentifier,
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| 342 | base->d.uniformResourceIdentifier);
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| 343 |
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| 344 | case GEN_IPADD:
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| 345 | return nc_ip(gen->d.iPAddress, base->d.iPAddress);
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| 346 |
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| 347 | default:
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| 348 | return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE;
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| 349 | }
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| 350 |
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| 351 | }
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| 352 |
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| 353 | /*
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| 354 | * directoryName name constraint matching. The canonical encoding of
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| 355 | * X509_NAME makes this comparison easy. It is matched if the subtree is a
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| 356 | * subset of the name.
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| 357 | */
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| 358 |
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| 359 | static int nc_dn(X509_NAME *nm, X509_NAME *base)
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| 360 | {
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| 361 | /* Ensure canonical encodings are up to date. */
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| 362 | if (nm->modified && i2d_X509_NAME(nm, NULL) < 0)
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| 363 | return X509_V_ERR_OUT_OF_MEM;
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| 364 | if (base->modified && i2d_X509_NAME(base, NULL) < 0)
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| 365 | return X509_V_ERR_OUT_OF_MEM;
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| 366 | if (base->canon_enclen > nm->canon_enclen)
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| 367 | return X509_V_ERR_PERMITTED_VIOLATION;
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| 368 | if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen))
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| 369 | return X509_V_ERR_PERMITTED_VIOLATION;
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| 370 | return X509_V_OK;
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| 371 | }
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| 372 |
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| 373 | static int nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base)
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| 374 | {
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| 375 | char *baseptr = (char *)base->data;
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| 376 | char *dnsptr = (char *)dns->data;
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| 377 | /* Empty matches everything */
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| 378 | if (!*baseptr)
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| 379 | return X509_V_OK;
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| 380 | /*
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| 381 | * Otherwise can add zero or more components on the left so compare RHS
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| 382 | * and if dns is longer and expect '.' as preceding character.
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| 383 | */
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| 384 | if (dns->length > base->length) {
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| 385 | dnsptr += dns->length - base->length;
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| 386 | if (*baseptr != '.' && dnsptr[-1] != '.')
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| 387 | return X509_V_ERR_PERMITTED_VIOLATION;
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| 388 | }
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| 389 |
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| 390 | if (strcasecmp(baseptr, dnsptr))
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| 391 | return X509_V_ERR_PERMITTED_VIOLATION;
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| 392 |
|
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| 393 | return X509_V_OK;
|
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| 394 |
|
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| 395 | }
|
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| 396 |
|
---|
| 397 | static int nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base)
|
---|
| 398 | {
|
---|
| 399 | const char *baseptr = (char *)base->data;
|
---|
| 400 | const char *emlptr = (char *)eml->data;
|
---|
| 401 |
|
---|
| 402 | const char *baseat = strchr(baseptr, '@');
|
---|
| 403 | const char *emlat = strchr(emlptr, '@');
|
---|
| 404 | if (!emlat)
|
---|
| 405 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
|
---|
| 406 | /* Special case: initial '.' is RHS match */
|
---|
| 407 | if (!baseat && (*baseptr == '.')) {
|
---|
| 408 | if (eml->length > base->length) {
|
---|
| 409 | emlptr += eml->length - base->length;
|
---|
| 410 | if (strcasecmp(baseptr, emlptr) == 0)
|
---|
| 411 | return X509_V_OK;
|
---|
| 412 | }
|
---|
| 413 | return X509_V_ERR_PERMITTED_VIOLATION;
|
---|
| 414 | }
|
---|
| 415 |
|
---|
| 416 | /* If we have anything before '@' match local part */
|
---|
| 417 |
|
---|
| 418 | if (baseat) {
|
---|
| 419 | if (baseat != baseptr) {
|
---|
| 420 | if ((baseat - baseptr) != (emlat - emlptr))
|
---|
| 421 | return X509_V_ERR_PERMITTED_VIOLATION;
|
---|
| 422 | /* Case sensitive match of local part */
|
---|
| 423 | if (strncmp(baseptr, emlptr, emlat - emlptr))
|
---|
| 424 | return X509_V_ERR_PERMITTED_VIOLATION;
|
---|
| 425 | }
|
---|
| 426 | /* Position base after '@' */
|
---|
| 427 | baseptr = baseat + 1;
|
---|
| 428 | }
|
---|
| 429 | emlptr = emlat + 1;
|
---|
| 430 | /* Just have hostname left to match: case insensitive */
|
---|
| 431 | if (strcasecmp(baseptr, emlptr))
|
---|
| 432 | return X509_V_ERR_PERMITTED_VIOLATION;
|
---|
| 433 |
|
---|
| 434 | return X509_V_OK;
|
---|
| 435 |
|
---|
| 436 | }
|
---|
| 437 |
|
---|
| 438 | static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base)
|
---|
| 439 | {
|
---|
| 440 | const char *baseptr = (char *)base->data;
|
---|
| 441 | const char *hostptr = (char *)uri->data;
|
---|
| 442 | const char *p = strchr(hostptr, ':');
|
---|
| 443 | int hostlen;
|
---|
| 444 | /* Check for foo:// and skip past it */
|
---|
| 445 | if (!p || (p[1] != '/') || (p[2] != '/'))
|
---|
| 446 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
|
---|
| 447 | hostptr = p + 3;
|
---|
| 448 |
|
---|
| 449 | /* Determine length of hostname part of URI */
|
---|
| 450 |
|
---|
| 451 | /* Look for a port indicator as end of hostname first */
|
---|
| 452 |
|
---|
| 453 | p = strchr(hostptr, ':');
|
---|
| 454 | /* Otherwise look for trailing slash */
|
---|
| 455 | if (!p)
|
---|
| 456 | p = strchr(hostptr, '/');
|
---|
| 457 |
|
---|
| 458 | if (!p)
|
---|
| 459 | hostlen = strlen(hostptr);
|
---|
| 460 | else
|
---|
| 461 | hostlen = p - hostptr;
|
---|
| 462 |
|
---|
| 463 | if (hostlen == 0)
|
---|
| 464 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
|
---|
| 465 |
|
---|
| 466 | /* Special case: initial '.' is RHS match */
|
---|
| 467 | if (*baseptr == '.') {
|
---|
| 468 | if (hostlen > base->length) {
|
---|
| 469 | p = hostptr + hostlen - base->length;
|
---|
| 470 | if (strncasecmp(p, baseptr, base->length) == 0)
|
---|
| 471 | return X509_V_OK;
|
---|
| 472 | }
|
---|
| 473 | return X509_V_ERR_PERMITTED_VIOLATION;
|
---|
| 474 | }
|
---|
| 475 |
|
---|
| 476 | if ((base->length != (int)hostlen)
|
---|
| 477 | || strncasecmp(hostptr, baseptr, hostlen))
|
---|
| 478 | return X509_V_ERR_PERMITTED_VIOLATION;
|
---|
| 479 |
|
---|
| 480 | return X509_V_OK;
|
---|
| 481 |
|
---|
| 482 | }
|
---|
| 483 |
|
---|
| 484 | static int nc_ip(ASN1_OCTET_STRING *ip, ASN1_OCTET_STRING *base)
|
---|
| 485 | {
|
---|
| 486 | int hostlen, baselen, i;
|
---|
| 487 | unsigned char *hostptr, *baseptr, *maskptr;
|
---|
| 488 | hostptr = ip->data;
|
---|
| 489 | hostlen = ip->length;
|
---|
| 490 | baseptr = base->data;
|
---|
| 491 | baselen = base->length;
|
---|
| 492 |
|
---|
| 493 | /* Invalid if not IPv4 or IPv6 */
|
---|
| 494 | if (!((hostlen == 4) || (hostlen == 16)))
|
---|
| 495 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
|
---|
| 496 | if (!((baselen == 8) || (baselen == 32)))
|
---|
| 497 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
|
---|
| 498 |
|
---|
| 499 | /* Do not match IPv4 with IPv6 */
|
---|
| 500 | if (hostlen * 2 != baselen)
|
---|
| 501 | return X509_V_ERR_PERMITTED_VIOLATION;
|
---|
| 502 |
|
---|
| 503 | maskptr = base->data + hostlen;
|
---|
| 504 |
|
---|
| 505 | /* Considering possible not aligned base ipAddress */
|
---|
| 506 | /* Not checking for wrong mask definition: i.e.: 255.0.255.0 */
|
---|
| 507 | for (i = 0; i < hostlen; i++)
|
---|
| 508 | if ((hostptr[i] & maskptr[i]) != (baseptr[i] & maskptr[i]))
|
---|
| 509 | return X509_V_ERR_PERMITTED_VIOLATION;
|
---|
| 510 |
|
---|
| 511 | return X509_V_OK;
|
---|
| 512 |
|
---|
| 513 | }
|
---|