1 /* x509_trs.c */ 2 /* Written by Dr Stephen N Henson (steve (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh (at) cryptsoft.com). 56 * 57 */ 58 59 #include <stdio.h> 60 #include "cryptlib.h" 61 #include <openssl/x509v3.h> 62 63 64 static int tr_cmp(const X509_TRUST * const *a, 65 const X509_TRUST * const *b); 66 static void trtable_free(X509_TRUST *p); 67 68 static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags); 69 static int trust_1oid(X509_TRUST *trust, X509 *x, int flags); 70 static int trust_compat(X509_TRUST *trust, X509 *x, int flags); 71 72 static int obj_trust(int id, X509 *x, int flags); 73 static int (*default_trust)(int id, X509 *x, int flags) = obj_trust; 74 75 /* WARNING: the following table should be kept in order of trust 76 * and without any gaps so we can just subtract the minimum trust 77 * value to get an index into the table 78 */ 79 80 static X509_TRUST trstandard[] = { 81 {X509_TRUST_COMPAT, 0, trust_compat, "compatible", 0, NULL}, 82 {X509_TRUST_SSL_CLIENT, 0, trust_1oidany, "SSL Client", NID_client_auth, NULL}, 83 {X509_TRUST_SSL_SERVER, 0, trust_1oidany, "SSL Server", NID_server_auth, NULL}, 84 {X509_TRUST_EMAIL, 0, trust_1oidany, "S/MIME email", NID_email_protect, NULL}, 85 {X509_TRUST_OBJECT_SIGN, 0, trust_1oidany, "Object Signer", NID_code_sign, NULL}, 86 {X509_TRUST_OCSP_SIGN, 0, trust_1oid, "OCSP responder", NID_OCSP_sign, NULL}, 87 {X509_TRUST_OCSP_REQUEST, 0, trust_1oid, "OCSP request", NID_ad_OCSP, NULL}, 88 {X509_TRUST_TSA, 0, trust_1oidany, "TSA server", NID_time_stamp, NULL} 89 }; 90 91 #define X509_TRUST_COUNT (sizeof(trstandard)/sizeof(X509_TRUST)) 92 93 IMPLEMENT_STACK_OF(X509_TRUST) 94 95 static STACK_OF(X509_TRUST) *trtable = NULL; 96 97 static int tr_cmp(const X509_TRUST * const *a, 98 const X509_TRUST * const *b) 99 { 100 return (*a)->trust - (*b)->trust; 101 } 102 103 int (*X509_TRUST_set_default(int (*trust)(int , X509 *, int)))(int, X509 *, int) 104 { 105 int (*oldtrust)(int , X509 *, int); 106 oldtrust = default_trust; 107 default_trust = trust; 108 return oldtrust; 109 } 110 111 112 int X509_check_trust(X509 *x, int id, int flags) 113 { 114 X509_TRUST *pt; 115 int idx; 116 if(id == -1) return 1; 117 idx = X509_TRUST_get_by_id(id); 118 if(idx == -1) return default_trust(id, x, flags); 119 pt = X509_TRUST_get0(idx); 120 return pt->check_trust(pt, x, flags); 121 } 122 123 int X509_TRUST_get_count(void) 124 { 125 if(!trtable) return X509_TRUST_COUNT; 126 return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT; 127 } 128 129 X509_TRUST * X509_TRUST_get0(int idx) 130 { 131 if(idx < 0) return NULL; 132 if(idx < (int)X509_TRUST_COUNT) return trstandard + idx; 133 return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT); 134 } 135 136 int X509_TRUST_get_by_id(int id) 137 { 138 X509_TRUST tmp; 139 int idx; 140 if((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX)) 141 return id - X509_TRUST_MIN; 142 tmp.trust = id; 143 if(!trtable) return -1; 144 idx = sk_X509_TRUST_find(trtable, &tmp); 145 if(idx == -1) return -1; 146 return idx + X509_TRUST_COUNT; 147 } 148 149 int X509_TRUST_set(int *t, int trust) 150 { 151 if(X509_TRUST_get_by_id(trust) == -1) { 152 X509err(X509_F_X509_TRUST_SET, X509_R_INVALID_TRUST); 153 return 0; 154 } 155 *t = trust; 156 return 1; 157 } 158 159 int X509_TRUST_add(int id, int flags, int (*ck)(X509_TRUST *, X509 *, int), 160 char *name, int arg1, void *arg2) 161 { 162 int idx; 163 X509_TRUST *trtmp; 164 /* This is set according to what we change: application can't set it */ 165 flags &= ~X509_TRUST_DYNAMIC; 166 /* This will always be set for application modified trust entries */ 167 flags |= X509_TRUST_DYNAMIC_NAME; 168 /* Get existing entry if any */ 169 idx = X509_TRUST_get_by_id(id); 170 /* Need a new entry */ 171 if(idx == -1) { 172 if(!(trtmp = OPENSSL_malloc(sizeof(X509_TRUST)))) { 173 X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE); 174 return 0; 175 } 176 trtmp->flags = X509_TRUST_DYNAMIC; 177 } else trtmp = X509_TRUST_get0(idx); 178 179 /* OPENSSL_free existing name if dynamic */ 180 if(trtmp->flags & X509_TRUST_DYNAMIC_NAME) OPENSSL_free(trtmp->name); 181 /* dup supplied name */ 182 if(!(trtmp->name = BUF_strdup(name))) { 183 X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE); 184 return 0; 185 } 186 /* Keep the dynamic flag of existing entry */ 187 trtmp->flags &= X509_TRUST_DYNAMIC; 188 /* Set all other flags */ 189 trtmp->flags |= flags; 190 191 trtmp->trust = id; 192 trtmp->check_trust = ck; 193 trtmp->arg1 = arg1; 194 trtmp->arg2 = arg2; 195 196 /* If its a new entry manage the dynamic table */ 197 if(idx == -1) { 198 if(!trtable && !(trtable = sk_X509_TRUST_new(tr_cmp))) { 199 X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE); 200 return 0; 201 } 202 if (!sk_X509_TRUST_push(trtable, trtmp)) { 203 X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE); 204 return 0; 205 } 206 } 207 return 1; 208 } 209 210 static void trtable_free(X509_TRUST *p) 211 { 212 if(!p) return; 213 if (p->flags & X509_TRUST_DYNAMIC) 214 { 215 if (p->flags & X509_TRUST_DYNAMIC_NAME) 216 OPENSSL_free(p->name); 217 OPENSSL_free(p); 218 } 219 } 220 221 void X509_TRUST_cleanup(void) 222 { 223 unsigned int i; 224 for(i = 0; i < X509_TRUST_COUNT; i++) trtable_free(trstandard + i); 225 sk_X509_TRUST_pop_free(trtable, trtable_free); 226 trtable = NULL; 227 } 228 229 int X509_TRUST_get_flags(X509_TRUST *xp) 230 { 231 return xp->flags; 232 } 233 234 char *X509_TRUST_get0_name(X509_TRUST *xp) 235 { 236 return xp->name; 237 } 238 239 int X509_TRUST_get_trust(X509_TRUST *xp) 240 { 241 return xp->trust; 242 } 243 244 static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags) 245 { 246 if(x->aux && (x->aux->trust || x->aux->reject)) 247 return obj_trust(trust->arg1, x, flags); 248 /* we don't have any trust settings: for compatibility 249 * we return trusted if it is self signed 250 */ 251 return trust_compat(trust, x, flags); 252 } 253 254 static int trust_1oid(X509_TRUST *trust, X509 *x, int flags) 255 { 256 if(x->aux) return obj_trust(trust->arg1, x, flags); 257 return X509_TRUST_UNTRUSTED; 258 } 259 260 static int trust_compat(X509_TRUST *trust, X509 *x, int flags) 261 { 262 X509_check_purpose(x, -1, 0); 263 if(x->ex_flags & EXFLAG_SS) return X509_TRUST_TRUSTED; 264 else return X509_TRUST_UNTRUSTED; 265 } 266 267 static int obj_trust(int id, X509 *x, int flags) 268 { 269 ASN1_OBJECT *obj; 270 int i; 271 X509_CERT_AUX *ax; 272 ax = x->aux; 273 if(!ax) return X509_TRUST_UNTRUSTED; 274 if(ax->reject) { 275 for(i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) { 276 obj = sk_ASN1_OBJECT_value(ax->reject, i); 277 if(OBJ_obj2nid(obj) == id) return X509_TRUST_REJECTED; 278 } 279 } 280 if(ax->trust) { 281 for(i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) { 282 obj = sk_ASN1_OBJECT_value(ax->trust, i); 283 if(OBJ_obj2nid(obj) == id) return X509_TRUST_TRUSTED; 284 } 285 } 286 return X509_TRUST_UNTRUSTED; 287 } 288 289
