crypto/x509/x509_att.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <stdio.h>
  59 #include <openssl/stack.h>
  60 #include "internal/cryptlib.h"
  61 #include <openssl/asn1.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/evp.h>
  64 #include <openssl/x509.h>
  65 #include <openssl/x509v3.h>
  66 #include "x509_lcl.h"
  67
  68 int X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)
  69 {
  70     return sk_X509_ATTRIBUTE_num(x);
  71 }
  72
  73 int X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid,
  74                            int lastpos)
  75 {
  76     ASN1_OBJECT *obj;
  77
  78     obj = OBJ_nid2obj(nid);
  79     if (obj == NULL)
  80         return (-2);
  81     return (X509at_get_attr_by_OBJ(x, obj, lastpos));
  82 }
  83
  84 int X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk,
  85                            ASN1_OBJECT *obj, int lastpos)
  86 {
  87     int n;
  88     X509_ATTRIBUTE *ex;
  89
  90     if (sk == NULL)
  91         return (-1);
  92     lastpos++;
  93     if (lastpos < 0)
  94         lastpos = 0;
  95     n = sk_X509_ATTRIBUTE_num(sk);
  96     for (; lastpos < n; lastpos++) {
  97         ex = sk_X509_ATTRIBUTE_value(sk, lastpos);
  98         if (OBJ_cmp(ex->object, obj) == 0)
  99             return (lastpos);
 100     }
 101     return (-1);
 102 }
 103
 104 X509_ATTRIBUTE *X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)
 105 {
 106     if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
 107         return NULL;
 108     else
 109         return sk_X509_ATTRIBUTE_value(x, loc);
 110 }
 111
 112 X509_ATTRIBUTE *X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)
 113 {
 114     X509_ATTRIBUTE *ret;
 115
 116     if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
 117         return (NULL);
 118     ret = sk_X509_ATTRIBUTE_delete(x, loc);
 119     return (ret);
 120 }
 121
 122 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,
 123                                            X509_ATTRIBUTE *attr)
 124 {
 125     X509_ATTRIBUTE *new_attr = NULL;
 126     STACK_OF(X509_ATTRIBUTE) *sk = NULL;
 127
 128     if (x == NULL) {
 129         X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_PASSED_NULL_PARAMETER);
 130         goto err2;
 131     }
 132
 133     if (*x == NULL) {
 134         if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
 135             goto err;
 136     } else
 137         sk = *x;
 138
 139     if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL)
 140         goto err2;
 141     if (!sk_X509_ATTRIBUTE_push(sk, new_attr))
 142         goto err;
 143     if (*x == NULL)
 144         *x = sk;
 145     return (sk);
 146  err:
 147     X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_MALLOC_FAILURE);
 148  err2:
 149     X509_ATTRIBUTE_free(new_attr);
 150     sk_X509_ATTRIBUTE_free(sk);
 151     return (NULL);
 152 }
 153
 154 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE)
 155                                                   **x, const ASN1_OBJECT *obj,
 156                                                   int type,
 157                                                   const unsigned char *bytes,
 158                                                   int len)
 159 {
 160     X509_ATTRIBUTE *attr;
 161     STACK_OF(X509_ATTRIBUTE) *ret;
 162     attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);
 163     if (!attr)
 164         return 0;
 165     ret = X509at_add1_attr(x, attr);
 166     X509_ATTRIBUTE_free(attr);
 167     return ret;
 168 }
 169
 170 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE)
 171                                                   **x, int nid, int type,
 172                                                   const unsigned char *bytes,
 173                                                   int len)
 174 {
 175     X509_ATTRIBUTE *attr;
 176     STACK_OF(X509_ATTRIBUTE) *ret;
 177     attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);
 178     if (!attr)
 179         return 0;
 180     ret = X509at_add1_attr(x, attr);
 181     X509_ATTRIBUTE_free(attr);
 182     return ret;
 183 }
 184
 185 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE)
 186                                                   **x, const char *attrname,
 187                                                   int type,
 188                                                   const unsigned char *bytes,
 189                                                   int len)
 190 {
 191     X509_ATTRIBUTE *attr;
 192     STACK_OF(X509_ATTRIBUTE) *ret;
 193     attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);
 194     if (!attr)
 195         return 0;
 196     ret = X509at_add1_attr(x, attr);
 197     X509_ATTRIBUTE_free(attr);
 198     return ret;
 199 }
 200
 201 void *X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x,
 202                               ASN1_OBJECT *obj, int lastpos, int type)
 203 {
 204     int i;
 205     X509_ATTRIBUTE *at;
 206     i = X509at_get_attr_by_OBJ(x, obj, lastpos);
 207     if (i == -1)
 208         return NULL;
 209     if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1))
 210         return NULL;
 211     at = X509at_get_attr(x, i);
 212     if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1))
 213         return NULL;
 214     return X509_ATTRIBUTE_get0_data(at, 0, type, NULL);
 215 }
 216
 217 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid,
 218                                              int atrtype, const void *data,
 219                                              int len)
 220 {
 221     ASN1_OBJECT *obj;
 222     X509_ATTRIBUTE *ret;
 223
 224     obj = OBJ_nid2obj(nid);
 225     if (obj == NULL) {
 226         X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_NID, X509_R_UNKNOWN_NID);
 227         return (NULL);
 228     }
 229     ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len);
 230     if (ret == NULL)
 231         ASN1_OBJECT_free(obj);
 232     return (ret);
 233 }
 234
 235 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr,
 236                                              const ASN1_OBJECT *obj,
 237                                              int atrtype, const void *data,
 238                                              int len)
 239 {
 240     X509_ATTRIBUTE *ret;
 241
 242     if ((attr == NULL) || (*attr == NULL)) {
 243         if ((ret = X509_ATTRIBUTE_new()) == NULL) {
 244             X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_OBJ,
 245                     ERR_R_MALLOC_FAILURE);
 246             return (NULL);
 247         }
 248     } else
 249         ret = *attr;
 250
 251     if (!X509_ATTRIBUTE_set1_object(ret, obj))
 252         goto err;
 253     if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len))
 254         goto err;
 255
 256     if ((attr != NULL) && (*attr == NULL))
 257         *attr = ret;
 258     return (ret);
 259  err:
 260     if ((attr == NULL) || (ret != *attr))
 261         X509_ATTRIBUTE_free(ret);
 262     return (NULL);
 263 }
 264
 265 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr,
 266                                              const char *atrname, int type,
 267                                              const unsigned char *bytes,
 268                                              int len)
 269 {
 270     ASN1_OBJECT *obj;
 271     X509_ATTRIBUTE *nattr;
 272
 273     obj = OBJ_txt2obj(atrname, 0);
 274     if (obj == NULL) {
 275         X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_TXT,
 276                 X509_R_INVALID_FIELD_NAME);
 277         ERR_add_error_data(2, "name=", atrname);
 278         return (NULL);
 279     }
 280     nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len);
 281     ASN1_OBJECT_free(obj);
 282     return nattr;
 283 }
 284
 285 int X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)
 286 {
 287     if ((attr == NULL) || (obj == NULL))
 288         return (0);
 289     ASN1_OBJECT_free(attr->object);
 290     attr->object = OBJ_dup(obj);
 291     return (1);
 292 }
 293
 294 int X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype,
 295                              const void *data, int len)
 296 {
 297     ASN1_TYPE *ttmp;
 298     ASN1_STRING *stmp = NULL;
 299     int atype = 0;
 300     if (!attr)
 301         return 0;
 302     if (attrtype & MBSTRING_FLAG) {
 303         stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,
 304                                       OBJ_obj2nid(attr->object));
 305         if (!stmp) {
 306             X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_ASN1_LIB);
 307             return 0;
 308         }
 309         atype = stmp->type;
 310     } else if (len != -1) {
 311         if ((stmp = ASN1_STRING_type_new(attrtype)) == NULL)
 312             goto err;
 313         if (!ASN1_STRING_set(stmp, data, len))
 314             goto err;
 315         atype = attrtype;
 316     }
 317     /*
 318      * This is a bit naughty because the attribute should really have at
 319      * least one value but some types use and zero length SET and require
 320      * this.
 321      */
 322     if (attrtype == 0)
 323         return 1;
 324     if ((ttmp = ASN1_TYPE_new()) == NULL)
 325         goto err;
 326     if ((len == -1) && !(attrtype & MBSTRING_FLAG)) {
 327         if (!ASN1_TYPE_set1(ttmp, attrtype, data))
 328             goto err;
 329     } else
 330         ASN1_TYPE_set(ttmp, atype, stmp);
 331     if (!sk_ASN1_TYPE_push(attr->set, ttmp))
 332         goto err;
 333     return 1;
 334  err:
 335     X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_MALLOC_FAILURE);
 336     return 0;
 337 }
 338
 339 int X509_ATTRIBUTE_count(X509_ATTRIBUTE *attr)
 340 {
 341     if (attr == NULL)
 342         return 0;
 343     return sk_ASN1_TYPE_num(attr->set);
 344 }
 345
 346 ASN1_OBJECT *X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)
 347 {
 348     if (attr == NULL)
 349         return (NULL);
 350     return (attr->object);
 351 }
 352
 353 void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx,
 354                                int atrtype, void *data)
 355 {
 356     ASN1_TYPE *ttmp;
 357     ttmp = X509_ATTRIBUTE_get0_type(attr, idx);
 358     if (!ttmp)
 359         return NULL;
 360     if (atrtype != ASN1_TYPE_get(ttmp)) {
 361         X509err(X509_F_X509_ATTRIBUTE_GET0_DATA, X509_R_WRONG_TYPE);
 362         return NULL;
 363     }
 364     return ttmp->value.ptr;
 365 }
 366
 367 ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)
 368 {
 369     if (attr == NULL)
 370         return NULL;
 371     return sk_ASN1_TYPE_value(attr->set, idx);
 372 }