Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | |
| 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 | |