lib/libcrypto/asn1/x_x509.c

   1 /* $OpenBSD: x_x509.c,v 1.26 2018/02/17 15:50:42 jsing 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/opensslconf.h>
  62
  63 #include <openssl/asn1t.h>
  64 #include <openssl/evp.h>
  65 #include <openssl/x509.h>
  66 #include <openssl/x509v3.h>
  67
  68 static const ASN1_AUX X509_CINF_aux = {
  69         .flags = ASN1_AFLG_ENCODING,
  70         .enc_offset = offsetof(X509_CINF, enc),
  71 };
  72 static const ASN1_TEMPLATE X509_CINF_seq_tt[] = {
  73         {
  74                 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,
  75                 .offset = offsetof(X509_CINF, version),
  76                 .field_name = "version",
  77                 .item = &ASN1_INTEGER_it,
  78         },
  79         {
  80                 .offset = offsetof(X509_CINF, serialNumber),
  81                 .field_name = "serialNumber",
  82                 .item = &ASN1_INTEGER_it,
  83         },
  84         {
  85                 .offset = offsetof(X509_CINF, signature),
  86                 .field_name = "signature",
  87                 .item = &X509_ALGOR_it,
  88         },
  89         {
  90                 .offset = offsetof(X509_CINF, issuer),
  91                 .field_name = "issuer",
  92                 .item = &X509_NAME_it,
  93         },
  94         {
  95                 .offset = offsetof(X509_CINF, validity),
  96                 .field_name = "validity",
  97                 .item = &X509_VAL_it,
  98         },
  99         {
 100                 .offset = offsetof(X509_CINF, subject),
 101                 .field_name = "subject",
 102                 .item = &X509_NAME_it,
 103         },
 104         {
 105                 .offset = offsetof(X509_CINF, key),
 106                 .field_name = "key",
 107                 .item = &X509_PUBKEY_it,
 108         },
 109         {
 110                 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
 111                 .tag = 1,
 112                 .offset = offsetof(X509_CINF, issuerUID),
 113                 .field_name = "issuerUID",
 114                 .item = &ASN1_BIT_STRING_it,
 115         },
 116         {
 117                 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
 118                 .tag = 2,
 119                 .offset = offsetof(X509_CINF, subjectUID),
 120                 .field_name = "subjectUID",
 121                 .item = &ASN1_BIT_STRING_it,
 122         },
 123         {
 124                 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_SEQUENCE_OF |
 125                     ASN1_TFLG_OPTIONAL,
 126                 .tag = 3,
 127                 .offset = offsetof(X509_CINF, extensions),
 128                 .field_name = "extensions",
 129                 .item = &X509_EXTENSION_it,
 130         },
 131 };
 132
 133 const ASN1_ITEM X509_CINF_it = {
 134         .itype = ASN1_ITYPE_SEQUENCE,
 135         .utype = V_ASN1_SEQUENCE,
 136         .templates = X509_CINF_seq_tt,
 137         .tcount = sizeof(X509_CINF_seq_tt) / sizeof(ASN1_TEMPLATE),
 138         .funcs = &X509_CINF_aux,
 139         .size = sizeof(X509_CINF),
 140         .sname = "X509_CINF",
 141 };
 142
 143
 144 X509_CINF *
 145 d2i_X509_CINF(X509_CINF **a, const unsigned char **in, long len)
 146 {
 147         return (X509_CINF *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
 148             &X509_CINF_it);
 149 }
 150
 151 int
 152 i2d_X509_CINF(X509_CINF *a, unsigned char **out)
 153 {
 154         return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_CINF_it);
 155 }
 156
 157 X509_CINF *
 158 X509_CINF_new(void)
 159 {
 160         return (X509_CINF *)ASN1_item_new(&X509_CINF_it);
 161 }
 162
 163 void
 164 X509_CINF_free(X509_CINF *a)
 165 {
 166         ASN1_item_free((ASN1_VALUE *)a, &X509_CINF_it);
 167 }
 168 /* X509 top level structure needs a bit of customisation */
 169
 170 extern void policy_cache_free(X509_POLICY_CACHE *cache);
 171
 172 static int
 173 x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
 174 {
 175         X509 *ret = (X509 *)*pval;
 176
 177         switch (operation) {
 178
 179         case ASN1_OP_NEW_POST:
 180                 ret->valid = 0;
 181                 ret->name = NULL;
 182                 ret->ex_flags = 0;
 183                 ret->ex_pathlen = -1;
 184                 ret->skid = NULL;
 185                 ret->akid = NULL;
 186                 ret->aux = NULL;
 187                 ret->crldp = NULL;
 188                 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
 189                 break;
 190
 191         case ASN1_OP_D2I_POST:
 192                 free(ret->name);
 193                 ret->name = X509_NAME_oneline(ret->cert_info->subject, NULL, 0);
 194                 break;
 195
 196         case ASN1_OP_FREE_POST:
 197                 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
 198                 X509_CERT_AUX_free(ret->aux);
 199                 ASN1_OCTET_STRING_free(ret->skid);
 200                 AUTHORITY_KEYID_free(ret->akid);
 201                 CRL_DIST_POINTS_free(ret->crldp);
 202                 policy_cache_free(ret->policy_cache);
 203                 GENERAL_NAMES_free(ret->altname);
 204                 NAME_CONSTRAINTS_free(ret->nc);
 205                 free(ret->name);
 206                 ret->name = NULL;
 207                 break;
 208         }
 209
 210         return 1;
 211 }
 212
 213 static const ASN1_AUX X509_aux = {
 214         .app_data = NULL,
 215         .flags = ASN1_AFLG_REFCOUNT,
 216         .ref_offset = offsetof(X509, references),
 217         .ref_lock = CRYPTO_LOCK_X509,
 218         .asn1_cb = x509_cb,
 219 };
 220 static const ASN1_TEMPLATE X509_seq_tt[] = {
 221         {
 222                 .offset = offsetof(X509, cert_info),
 223                 .field_name = "cert_info",
 224                 .item = &X509_CINF_it,
 225         },
 226         {
 227                 .offset = offsetof(X509, sig_alg),
 228                 .field_name = "sig_alg",
 229                 .item = &X509_ALGOR_it,
 230         },
 231         {
 232                 .offset = offsetof(X509, signature),
 233                 .field_name = "signature",
 234                 .item = &ASN1_BIT_STRING_it,
 235         },
 236 };
 237
 238 const ASN1_ITEM X509_it = {
 239         .itype = ASN1_ITYPE_SEQUENCE,
 240         .utype = V_ASN1_SEQUENCE,
 241         .templates = X509_seq_tt,
 242         .tcount = sizeof(X509_seq_tt) / sizeof(ASN1_TEMPLATE),
 243         .funcs = &X509_aux,
 244         .size = sizeof(X509),
 245         .sname = "X509",
 246 };
 247
 248
 249 X509 *
 250 d2i_X509(X509 **a, const unsigned char **in, long len)
 251 {
 252         return (X509 *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
 253             &X509_it);
 254 }
 255
 256 int
 257 i2d_X509(X509 *a, unsigned char **out)
 258 {
 259         return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_it);
 260 }
 261
 262 X509 *
 263 X509_new(void)
 264 {
 265         return (X509 *)ASN1_item_new(&X509_it);
 266 }
 267
 268 void
 269 X509_free(X509 *a)
 270 {
 271         ASN1_item_free((ASN1_VALUE *)a, &X509_it);
 272 }
 273
 274 X509 *
 275 X509_dup(X509 *x)
 276 {
 277         return ASN1_item_dup(&X509_it, x);
 278 }
 279
 280 int
 281 X509_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
 282     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
 283 {
 284         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509, argl, argp,
 285             new_func, dup_func, free_func);
 286 }
 287
 288 int
 289 X509_set_ex_data(X509 *r, int idx, void *arg)
 290 {
 291         return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
 292 }
 293
 294 void *
 295 X509_get_ex_data(X509 *r, int idx)
 296 {
 297         return (CRYPTO_get_ex_data(&r->ex_data, idx));
 298 }
 299
 300 /* X509_AUX ASN1 routines. X509_AUX is the name given to
 301  * a certificate with extra info tagged on the end. Since these
 302  * functions set how a certificate is trusted they should only
 303  * be used when the certificate comes from a reliable source
 304  * such as local storage.
 305  *
 306  */
 307
 308 X509 *
 309 d2i_X509_AUX(X509 **a, const unsigned char **pp, long length)
 310 {
 311         const unsigned char *q;
 312         X509 *ret;
 313
 314         /* Save start position */
 315         q = *pp;
 316         ret = d2i_X509(NULL, pp, length);
 317         /* If certificate unreadable then forget it */
 318         if (!ret)
 319                 return NULL;
 320         /* update length */
 321         length -= *pp - q;
 322         if (length > 0) {
 323                 if (!d2i_X509_CERT_AUX(&ret->aux, pp, length))
 324                         goto err;
 325         }
 326         if (a != NULL) {
 327                 X509_free(*a);
 328                 *a = ret;
 329         }
 330         return ret;
 331
 332 err:
 333         X509_free(ret);
 334         return NULL;
 335 }
 336
 337 int
 338 i2d_X509_AUX(X509 *a, unsigned char **pp)
 339 {
 340         int length;
 341
 342         length = i2d_X509(a, pp);
 343         if (a)
 344                 length += i2d_X509_CERT_AUX(a->aux, pp);
 345         return length;
 346 }
 347
 348 void
 349 X509_get0_signature(const ASN1_BIT_STRING **psig, const X509_ALGOR **palg,
 350     const X509 *x)
 351 {
 352         if (psig != NULL)
 353                 *psig = x->signature;
 354         if (palg != NULL)
 355                 *palg = x->sig_alg;
 356 }
 357
 358 int
 359 X509_get_signature_nid(const X509 *x)
 360 {
 361         return OBJ_obj2nid(x->sig_alg->algorithm);
 362 }