1/* x509_trs.c */ 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 "cryptlib.h" 61#include <openssl/x509v3.h> 62 63 64static int tr_cmp(const X509_TRUST * const *a, 65 const X509_TRUST * const *b); 66static void trtable_free(X509_TRUST *p); 67 68static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags); 69static int trust_1oid(X509_TRUST *trust, X509 *x, int flags); 70static int trust_compat(X509_TRUST *trust, X509 *x, int flags); 71 72static int obj_trust(int id, X509 *x, int flags); 73static 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 80static 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 93IMPLEMENT_STACK_OF(X509_TRUST) 94 95static STACK_OF(X509_TRUST) *trtable = NULL; 96 97static int tr_cmp(const X509_TRUST * const *a, 98 const X509_TRUST * const *b) 99{ 100 return (*a)->trust - (*b)->trust; 101} 102 103int (*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 112int 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 123int 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 129X509_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 136int 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 149int 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 159int 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 210static 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 221void 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 229int X509_TRUST_get_flags(X509_TRUST *xp) 230{ 231 return xp->flags; 232} 233 234char *X509_TRUST_get0_name(X509_TRUST *xp) 235{ 236 return xp->name; 237} 238 239int X509_TRUST_get_trust(X509_TRUST *xp) 240{ 241 return xp->trust; 242} 243 244static 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 254static 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 260static 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 267static 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