release/src/router/openssl/crypto/x509/x509_trs.c

   1 /* x509_trs.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 1999.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include <stdio.h>
  61 #include "cryptlib.h"
  62 #include <openssl/x509v3.h>
  63
  64 static int tr_cmp(const X509_TRUST *const *a, const X509_TRUST *const *b);
  65 static void trtable_free(X509_TRUST *p);
  66
  67 static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags);
  68 static int trust_1oid(X509_TRUST *trust, X509 *x, int flags);
  69 static int trust_compat(X509_TRUST *trust, X509 *x, int flags);
  70
  71 static int obj_trust(int id, X509 *x, int flags);
  72 static int (*default_trust) (int id, X509 *x, int flags) = obj_trust;
  73
  74 /*
  75  * WARNING: the following table should be kept in order of trust and without
  76  * any gaps so we can just subtract the minimum trust value to get an index
  77  * 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,
  83      NULL},
  84     {X509_TRUST_SSL_SERVER, 0, trust_1oidany, "SSL Server", NID_server_auth,
  85      NULL},
  86     {X509_TRUST_EMAIL, 0, trust_1oidany, "S/MIME email", NID_email_protect,
  87      NULL},
  88     {X509_TRUST_OBJECT_SIGN, 0, trust_1oidany, "Object Signer", NID_code_sign,
  89      NULL},
  90     {X509_TRUST_OCSP_SIGN, 0, trust_1oid, "OCSP responder", NID_OCSP_sign,
  91      NULL},
  92     {X509_TRUST_OCSP_REQUEST, 0, trust_1oid, "OCSP request", NID_ad_OCSP,
  93      NULL},
  94     {X509_TRUST_TSA, 0, trust_1oidany, "TSA server", NID_time_stamp, NULL}
  95 };
  96
  97 #define X509_TRUST_COUNT        (sizeof(trstandard)/sizeof(X509_TRUST))
  98
  99 IMPLEMENT_STACK_OF(X509_TRUST)
 100
 101 static STACK_OF(X509_TRUST) *trtable = NULL;
 102
 103 static int tr_cmp(const X509_TRUST *const *a, const X509_TRUST *const *b)
 104 {
 105     return (*a)->trust - (*b)->trust;
 106 }
 107
 108 int (*X509_TRUST_set_default(int (*trust) (int, X509 *, int))) (int, X509 *,
 109                                                                 int) {
 110     int (*oldtrust) (int, X509 *, int);
 111     oldtrust = default_trust;
 112     default_trust = trust;
 113     return oldtrust;
 114 }
 115
 116 int X509_check_trust(X509 *x, int id, int flags)
 117 {
 118     X509_TRUST *pt;
 119     int idx;
 120     if (id == -1)
 121         return 1;
 122     idx = X509_TRUST_get_by_id(id);
 123     if (idx == -1)
 124         return default_trust(id, x, flags);
 125     pt = X509_TRUST_get0(idx);
 126     return pt->check_trust(pt, x, flags);
 127 }
 128
 129 int X509_TRUST_get_count(void)
 130 {
 131     if (!trtable)
 132         return X509_TRUST_COUNT;
 133     return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT;
 134 }
 135
 136 X509_TRUST *X509_TRUST_get0(int idx)
 137 {
 138     if (idx < 0)
 139         return NULL;
 140     if (idx < (int)X509_TRUST_COUNT)
 141         return trstandard + idx;
 142     return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT);
 143 }
 144
 145 int X509_TRUST_get_by_id(int id)
 146 {
 147     X509_TRUST tmp;
 148     int idx;
 149     if ((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX))
 150         return id - X509_TRUST_MIN;
 151     tmp.trust = id;
 152     if (!trtable)
 153         return -1;
 154     idx = sk_X509_TRUST_find(trtable, &tmp);
 155     if (idx == -1)
 156         return -1;
 157     return idx + X509_TRUST_COUNT;
 158 }
 159
 160 int X509_TRUST_set(int *t, int trust)
 161 {
 162     if (X509_TRUST_get_by_id(trust) == -1) {
 163         X509err(X509_F_X509_TRUST_SET, X509_R_INVALID_TRUST);
 164         return 0;
 165     }
 166     *t = trust;
 167     return 1;
 168 }
 169
 170 int X509_TRUST_add(int id, int flags, int (*ck) (X509_TRUST *, X509 *, int),
 171                    char *name, int arg1, void *arg2)
 172 {
 173     int idx;
 174     X509_TRUST *trtmp;
 175     /*
 176      * This is set according to what we change: application can't set it
 177      */
 178     flags &= ~X509_TRUST_DYNAMIC;
 179     /* This will always be set for application modified trust entries */
 180     flags |= X509_TRUST_DYNAMIC_NAME;
 181     /* Get existing entry if any */
 182     idx = X509_TRUST_get_by_id(id);
 183     /* Need a new entry */
 184     if (idx == -1) {
 185         if (!(trtmp = OPENSSL_malloc(sizeof(X509_TRUST)))) {
 186             X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
 187             return 0;
 188         }
 189         trtmp->flags = X509_TRUST_DYNAMIC;
 190     } else
 191         trtmp = X509_TRUST_get0(idx);
 192
 193     /* OPENSSL_free existing name if dynamic */
 194     if (trtmp->flags & X509_TRUST_DYNAMIC_NAME)
 195         OPENSSL_free(trtmp->name);
 196     /* dup supplied name */
 197     if (!(trtmp->name = BUF_strdup(name))) {
 198         X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
 199         return 0;
 200     }
 201     /* Keep the dynamic flag of existing entry */
 202     trtmp->flags &= X509_TRUST_DYNAMIC;
 203     /* Set all other flags */
 204     trtmp->flags |= flags;
 205
 206     trtmp->trust = id;
 207     trtmp->check_trust = ck;
 208     trtmp->arg1 = arg1;
 209     trtmp->arg2 = arg2;
 210
 211     /* If its a new entry manage the dynamic table */
 212     if (idx == -1) {
 213         if (!trtable && !(trtable = sk_X509_TRUST_new(tr_cmp))) {
 214             X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
 215             return 0;
 216         }
 217         if (!sk_X509_TRUST_push(trtable, trtmp)) {
 218             X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
 219             return 0;
 220         }
 221     }
 222     return 1;
 223 }
 224
 225 static void trtable_free(X509_TRUST *p)
 226 {
 227     if (!p)
 228         return;
 229     if (p->flags & X509_TRUST_DYNAMIC) {
 230         if (p->flags & X509_TRUST_DYNAMIC_NAME)
 231             OPENSSL_free(p->name);
 232         OPENSSL_free(p);
 233     }
 234 }
 235
 236 void X509_TRUST_cleanup(void)
 237 {
 238     unsigned int i;
 239     for (i = 0; i < X509_TRUST_COUNT; i++)
 240         trtable_free(trstandard + i);
 241     sk_X509_TRUST_pop_free(trtable, trtable_free);
 242     trtable = NULL;
 243 }
 244
 245 int X509_TRUST_get_flags(X509_TRUST *xp)
 246 {
 247     return xp->flags;
 248 }
 249
 250 char *X509_TRUST_get0_name(X509_TRUST *xp)
 251 {
 252     return xp->name;
 253 }
 254
 255 int X509_TRUST_get_trust(X509_TRUST *xp)
 256 {
 257     return xp->trust;
 258 }
 259
 260 static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags)
 261 {
 262     if (x->aux && (x->aux->trust || x->aux->reject))
 263         return obj_trust(trust->arg1, x, flags);
 264     /*
 265      * we don't have any trust settings: for compatibility we return trusted
 266      * if it is self signed
 267      */
 268     return trust_compat(trust, x, flags);
 269 }
 270
 271 static int trust_1oid(X509_TRUST *trust, X509 *x, int flags)
 272 {
 273     if (x->aux)
 274         return obj_trust(trust->arg1, x, flags);
 275     return X509_TRUST_UNTRUSTED;
 276 }
 277
 278 static int trust_compat(X509_TRUST *trust, X509 *x, int flags)
 279 {
 280     X509_check_purpose(x, -1, 0);
 281     if (x->ex_flags & EXFLAG_SS)
 282         return X509_TRUST_TRUSTED;
 283     else
 284         return X509_TRUST_UNTRUSTED;
 285 }
 286
 287 static int obj_trust(int id, X509 *x, int flags)
 288 {
 289     ASN1_OBJECT *obj;
 290     int i;
 291     X509_CERT_AUX *ax;
 292     ax = x->aux;
 293     if (!ax)
 294         return X509_TRUST_UNTRUSTED;
 295     if (ax->reject) {
 296         for (i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) {
 297             obj = sk_ASN1_OBJECT_value(ax->reject, i);
 298             if (OBJ_obj2nid(obj) == id)
 299                 return X509_TRUST_REJECTED;
 300         }
 301     }
 302     if (ax->trust) {
 303         for (i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) {
 304             obj = sk_ASN1_OBJECT_value(ax->trust, i);
 305             if (OBJ_obj2nid(obj) == id)
 306                 return X509_TRUST_TRUSTED;
 307         }
 308     }
 309     return X509_TRUST_UNTRUSTED;
 310 }