1 /* $OpenBSD: x509_v3.c,v 1.18 2021/11/01 20:53:08 tb Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 61 #include <openssl/asn1.h> 62 #include <openssl/err.h> 63 #include <openssl/evp.h> 64 #include <openssl/objects.h> 65 #include <openssl/stack.h> 66 #include <openssl/x509.h> 67 #include <openssl/x509v3.h> 68 69 #include "x509_lcl.h" 70 71 int 72 X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x) 73 { 74 if (x == NULL) 75 return (0); 76 return (sk_X509_EXTENSION_num(x)); 77 } 78 79 int 80 X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x, int nid, int lastpos) 81 { 82 ASN1_OBJECT *obj; 83 84 obj = OBJ_nid2obj(nid); 85 if (obj == NULL) 86 return (-2); 87 return (X509v3_get_ext_by_OBJ(x, obj, lastpos)); 88 } 89 90 int 91 X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *sk, 92 const ASN1_OBJECT *obj, int lastpos) 93 { 94 int n; 95 X509_EXTENSION *ex; 96 97 if (sk == NULL) 98 return (-1); 99 lastpos++; 100 if (lastpos < 0) 101 lastpos = 0; 102 n = sk_X509_EXTENSION_num(sk); 103 for (; lastpos < n; lastpos++) { 104 ex = sk_X509_EXTENSION_value(sk, lastpos); 105 if (OBJ_cmp(ex->object, obj) == 0) 106 return (lastpos); 107 } 108 return (-1); 109 } 110 111 int 112 X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *sk, int crit, 113 int lastpos) 114 { 115 int n; 116 X509_EXTENSION *ex; 117 118 if (sk == NULL) 119 return (-1); 120 lastpos++; 121 if (lastpos < 0) 122 lastpos = 0; 123 n = sk_X509_EXTENSION_num(sk); 124 for (; lastpos < n; lastpos++) { 125 ex = sk_X509_EXTENSION_value(sk, lastpos); 126 if (((ex->critical > 0) && crit) || 127 ((ex->critical <= 0) && !crit)) 128 return (lastpos); 129 } 130 return (-1); 131 } 132 133 X509_EXTENSION * 134 X509v3_get_ext(const STACK_OF(X509_EXTENSION) *x, int loc) 135 { 136 if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0) 137 return NULL; 138 else 139 return sk_X509_EXTENSION_value(x, loc); 140 } 141 142 X509_EXTENSION * 143 X509v3_delete_ext(STACK_OF(X509_EXTENSION) *x, int loc) 144 { 145 X509_EXTENSION *ret; 146 147 if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0) 148 return (NULL); 149 ret = sk_X509_EXTENSION_delete(x, loc); 150 return (ret); 151 } 152 153 STACK_OF(X509_EXTENSION) * 154 X509v3_add_ext(STACK_OF(X509_EXTENSION) **x, X509_EXTENSION *ex, int loc) 155 { 156 X509_EXTENSION *new_ex = NULL; 157 int n; 158 STACK_OF(X509_EXTENSION) *sk = NULL; 159 160 if (x == NULL) { 161 X509error(ERR_R_PASSED_NULL_PARAMETER); 162 goto err2; 163 } 164 165 if (*x == NULL) { 166 if ((sk = sk_X509_EXTENSION_new_null()) == NULL) 167 goto err; 168 } else 169 sk= *x; 170 171 n = sk_X509_EXTENSION_num(sk); 172 if (loc > n) 173 loc = n; 174 else if (loc < 0) 175 loc = n; 176 177 if ((new_ex = X509_EXTENSION_dup(ex)) == NULL) 178 goto err2; 179 if (!sk_X509_EXTENSION_insert(sk, new_ex, loc)) 180 goto err; 181 if (*x == NULL) 182 *x = sk; 183 return (sk); 184 185 err: 186 X509error(ERR_R_MALLOC_FAILURE); 187 err2: 188 if (new_ex != NULL) 189 X509_EXTENSION_free(new_ex); 190 if (sk != NULL && (x != NULL && sk != *x)) 191 sk_X509_EXTENSION_free(sk); 192 return (NULL); 193 } 194 195 X509_EXTENSION * 196 X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid, int crit, 197 ASN1_OCTET_STRING *data) 198 { 199 ASN1_OBJECT *obj; 200 X509_EXTENSION *ret; 201 202 obj = OBJ_nid2obj(nid); 203 if (obj == NULL) { 204 X509error(X509_R_UNKNOWN_NID); 205 return (NULL); 206 } 207 ret = X509_EXTENSION_create_by_OBJ(ex, obj, crit, data); 208 if (ret == NULL) 209 ASN1_OBJECT_free(obj); 210 return (ret); 211 } 212 213 X509_EXTENSION * 214 X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex, const ASN1_OBJECT *obj, 215 int crit, ASN1_OCTET_STRING *data) 216 { 217 X509_EXTENSION *ret; 218 219 if ((ex == NULL) || (*ex == NULL)) { 220 if ((ret = X509_EXTENSION_new()) == NULL) { 221 X509error(ERR_R_MALLOC_FAILURE); 222 return (NULL); 223 } 224 } else 225 ret= *ex; 226 227 if (!X509_EXTENSION_set_object(ret, obj)) 228 goto err; 229 if (!X509_EXTENSION_set_critical(ret, crit)) 230 goto err; 231 if (!X509_EXTENSION_set_data(ret, data)) 232 goto err; 233 234 if ((ex != NULL) && (*ex == NULL)) 235 *ex = ret; 236 return (ret); 237 238 err: 239 if ((ex == NULL) || (ret != *ex)) 240 X509_EXTENSION_free(ret); 241 return (NULL); 242 } 243 244 int 245 X509_EXTENSION_set_object(X509_EXTENSION *ex, const ASN1_OBJECT *obj) 246 { 247 if ((ex == NULL) || (obj == NULL)) 248 return (0); 249 ASN1_OBJECT_free(ex->object); 250 ex->object = OBJ_dup(obj); 251 return ex->object != NULL; 252 } 253 254 int 255 X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit) 256 { 257 if (ex == NULL) 258 return (0); 259 ex->critical = (crit) ? 0xFF : -1; 260 return (1); 261 } 262 263 int 264 X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data) 265 { 266 int i; 267 268 if (ex == NULL) 269 return (0); 270 i = ASN1_STRING_set(ex->value, data->data, data->length); 271 if (!i) 272 return (0); 273 return (1); 274 } 275 276 ASN1_OBJECT * 277 X509_EXTENSION_get_object(X509_EXTENSION *ex) 278 { 279 if (ex == NULL) 280 return (NULL); 281 return (ex->object); 282 } 283 284 ASN1_OCTET_STRING * 285 X509_EXTENSION_get_data(X509_EXTENSION *ex) 286 { 287 if (ex == NULL) 288 return (NULL); 289 return (ex->value); 290 } 291 292 int 293 X509_EXTENSION_get_critical(const X509_EXTENSION *ex) 294 { 295 if (ex == NULL) 296 return (0); 297 if (ex->critical > 0) 298 return 1; 299 return 0; 300 } 301