1 /* $OpenBSD: x509_bcons.c,v 1.3 2023/02/16 08:38:17 tb Exp $ */ 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project 1999. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 1999 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) *i2v_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method, 69 BASIC_CONSTRAINTS *bcons, STACK_OF(CONF_VALUE) *extlist); 70 static BASIC_CONSTRAINTS *v2i_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method, 71 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values); 72 73 const X509V3_EXT_METHOD v3_bcons = { 74 .ext_nid = NID_basic_constraints, 75 .ext_flags = 0, 76 .it = &BASIC_CONSTRAINTS_it, 77 .ext_new = NULL, 78 .ext_free = NULL, 79 .d2i = NULL, 80 .i2d = NULL, 81 .i2s = NULL, 82 .s2i = NULL, 83 .i2v = (X509V3_EXT_I2V)i2v_BASIC_CONSTRAINTS, 84 .v2i = (X509V3_EXT_V2I)v2i_BASIC_CONSTRAINTS, 85 .i2r = NULL, 86 .r2i = NULL, 87 .usr_data = NULL, 88 }; 89 90 static const ASN1_TEMPLATE BASIC_CONSTRAINTS_seq_tt[] = { 91 { 92 .flags = ASN1_TFLG_OPTIONAL, 93 .tag = 0, 94 .offset = offsetof(BASIC_CONSTRAINTS, ca), 95 .field_name = "ca", 96 .item = &ASN1_FBOOLEAN_it, 97 }, 98 { 99 .flags = ASN1_TFLG_OPTIONAL, 100 .tag = 0, 101 .offset = offsetof(BASIC_CONSTRAINTS, pathlen), 102 .field_name = "pathlen", 103 .item = &ASN1_INTEGER_it, 104 }, 105 }; 106 107 const ASN1_ITEM BASIC_CONSTRAINTS_it = { 108 .itype = ASN1_ITYPE_SEQUENCE, 109 .utype = V_ASN1_SEQUENCE, 110 .templates = BASIC_CONSTRAINTS_seq_tt, 111 .tcount = sizeof(BASIC_CONSTRAINTS_seq_tt) / sizeof(ASN1_TEMPLATE), 112 .funcs = NULL, 113 .size = sizeof(BASIC_CONSTRAINTS), 114 .sname = "BASIC_CONSTRAINTS", 115 }; 116 117 118 BASIC_CONSTRAINTS * 119 d2i_BASIC_CONSTRAINTS(BASIC_CONSTRAINTS **a, const unsigned char **in, long len) 120 { 121 return (BASIC_CONSTRAINTS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 122 &BASIC_CONSTRAINTS_it); 123 } 124 LCRYPTO_ALIAS(d2i_BASIC_CONSTRAINTS); 125 126 int 127 i2d_BASIC_CONSTRAINTS(BASIC_CONSTRAINTS *a, unsigned char **out) 128 { 129 return ASN1_item_i2d((ASN1_VALUE *)a, out, &BASIC_CONSTRAINTS_it); 130 } 131 LCRYPTO_ALIAS(i2d_BASIC_CONSTRAINTS); 132 133 BASIC_CONSTRAINTS * 134 BASIC_CONSTRAINTS_new(void) 135 { 136 return (BASIC_CONSTRAINTS *)ASN1_item_new(&BASIC_CONSTRAINTS_it); 137 } 138 LCRYPTO_ALIAS(BASIC_CONSTRAINTS_new); 139 140 void 141 BASIC_CONSTRAINTS_free(BASIC_CONSTRAINTS *a) 142 { 143 ASN1_item_free((ASN1_VALUE *)a, &BASIC_CONSTRAINTS_it); 144 } 145 LCRYPTO_ALIAS(BASIC_CONSTRAINTS_free); 146 147 148 static STACK_OF(CONF_VALUE) * 149 i2v_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method, BASIC_CONSTRAINTS *bcons, 150 STACK_OF(CONF_VALUE) *extlist) 151 { 152 STACK_OF(CONF_VALUE) *free_extlist = NULL; 153 154 if (extlist == NULL) { 155 if ((free_extlist = extlist = sk_CONF_VALUE_new_null()) == NULL) 156 return NULL; 157 } 158 159 if (!X509V3_add_value_bool("CA", bcons->ca, &extlist)) 160 goto err; 161 if (!X509V3_add_value_int("pathlen", bcons->pathlen, &extlist)) 162 goto err; 163 164 return extlist; 165 166 err: 167 sk_CONF_VALUE_pop_free(free_extlist, X509V3_conf_free); 168 169 return NULL; 170 } 171 172 static BASIC_CONSTRAINTS * 173 v2i_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, 174 STACK_OF(CONF_VALUE) *values) 175 { 176 BASIC_CONSTRAINTS *bcons = NULL; 177 CONF_VALUE *val; 178 int i; 179 180 if (!(bcons = BASIC_CONSTRAINTS_new())) { 181 X509V3error(ERR_R_MALLOC_FAILURE); 182 return NULL; 183 } 184 for (i = 0; i < sk_CONF_VALUE_num(values); i++) { 185 val = sk_CONF_VALUE_value(values, i); 186 if (!strcmp(val->name, "CA")) { 187 if (!X509V3_get_value_bool(val, &bcons->ca)) 188 goto err; 189 } else if (!strcmp(val->name, "pathlen")) { 190 if (!X509V3_get_value_int(val, &bcons->pathlen)) 191 goto err; 192 } else { 193 X509V3error(X509V3_R_INVALID_NAME); 194 X509V3_conf_err(val); 195 goto err; 196 } 197 } 198 return bcons; 199 200 err: 201 BASIC_CONSTRAINTS_free(bcons); 202 return NULL; 203 } 204