crypto/x509/x509name.c

   1 /*
   2  * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/safestack.h>
  13 #include <openssl/asn1.h>
  14 #include <openssl/objects.h>
  15 #include <openssl/evp.h>
  16 #include <openssl/x509.h>
  17 #include "internal/x509_int.h"
  18
  19 int X509_NAME_get_text_by_NID(X509_NAME *name, int nid, char *buf, int len)
  20 {
  21     ASN1_OBJECT *obj;
  22
  23     obj = OBJ_nid2obj(nid);
  24     if (obj == NULL)
  25         return (-1);
  26     return (X509_NAME_get_text_by_OBJ(name, obj, buf, len));
  27 }
  28
  29 int X509_NAME_get_text_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, char *buf,
  30                               int len)
  31 {
  32     int i;
  33     const ASN1_STRING *data;
  34
  35     i = X509_NAME_get_index_by_OBJ(name, obj, -1);
  36     if (i < 0)
  37         return (-1);
  38     data = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name, i));
  39     i = (data->length > (len - 1)) ? (len - 1) : data->length;
  40     if (buf == NULL)
  41         return (data->length);
  42     memcpy(buf, data->data, i);
  43     buf[i] = '\0';
  44     return (i);
  45 }
  46
  47 int X509_NAME_entry_count(const X509_NAME *name)
  48 {
  49     if (name == NULL)
  50         return (0);
  51     return (sk_X509_NAME_ENTRY_num(name->entries));
  52 }
  53
  54 int X509_NAME_get_index_by_NID(X509_NAME *name, int nid, int lastpos)
  55 {
  56     ASN1_OBJECT *obj;
  57
  58     obj = OBJ_nid2obj(nid);
  59     if (obj == NULL)
  60         return (-2);
  61     return (X509_NAME_get_index_by_OBJ(name, obj, lastpos));
  62 }
  63
  64 /* NOTE: you should be passing -1, not 0 as lastpos */
  65 int X509_NAME_get_index_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int lastpos)
  66 {
  67     int n;
  68     X509_NAME_ENTRY *ne;
  69     STACK_OF(X509_NAME_ENTRY) *sk;
  70
  71     if (name == NULL)
  72         return (-1);
  73     if (lastpos < 0)
  74         lastpos = -1;
  75     sk = name->entries;
  76     n = sk_X509_NAME_ENTRY_num(sk);
  77     for (lastpos++; lastpos < n; lastpos++) {
  78         ne = sk_X509_NAME_ENTRY_value(sk, lastpos);
  79         if (OBJ_cmp(ne->object, obj) == 0)
  80             return (lastpos);
  81     }
  82     return (-1);
  83 }
  84
  85 X509_NAME_ENTRY *X509_NAME_get_entry(const X509_NAME *name, int loc)
  86 {
  87     if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc
  88         || loc < 0)
  89         return NULL;
  90
  91     return sk_X509_NAME_ENTRY_value(name->entries, loc);
  92 }
  93
  94 X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *name, int loc)
  95 {
  96     X509_NAME_ENTRY *ret;
  97     int i, n, set_prev, set_next;
  98     STACK_OF(X509_NAME_ENTRY) *sk;
  99
 100     if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc
 101         || loc < 0)
 102         return NULL;
 103
 104     sk = name->entries;
 105     ret = sk_X509_NAME_ENTRY_delete(sk, loc);
 106     n = sk_X509_NAME_ENTRY_num(sk);
 107     name->modified = 1;
 108     if (loc == n)
 109         return ret;
 110
 111     /* else we need to fixup the set field */
 112     if (loc != 0)
 113         set_prev = (sk_X509_NAME_ENTRY_value(sk, loc - 1))->set;
 114     else
 115         set_prev = ret->set - 1;
 116     set_next = sk_X509_NAME_ENTRY_value(sk, loc)->set;
 117
 118     /*-
 119      * set_prev is the previous set
 120      * set is the current set
 121      * set_next is the following
 122      * prev  1 1    1 1     1 1     1 1
 123      * set   1      1       2       2
 124      * next  1 1    2 2     2 2     3 2
 125      * so basically only if prev and next differ by 2, then
 126      * re-number down by 1
 127      */
 128     if (set_prev + 1 < set_next)
 129         for (i = loc; i < n; i++)
 130             sk_X509_NAME_ENTRY_value(sk, i)->set--;
 131     return ret;
 132 }
 133
 134 int X509_NAME_add_entry_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int type,
 135                                const unsigned char *bytes, int len, int loc,
 136                                int set)
 137 {
 138     X509_NAME_ENTRY *ne;
 139     int ret;
 140
 141     ne = X509_NAME_ENTRY_create_by_OBJ(NULL, obj, type, bytes, len);
 142     if (!ne)
 143         return 0;
 144     ret = X509_NAME_add_entry(name, ne, loc, set);
 145     X509_NAME_ENTRY_free(ne);
 146     return ret;
 147 }
 148
 149 int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type,
 150                                const unsigned char *bytes, int len, int loc,
 151                                int set)
 152 {
 153     X509_NAME_ENTRY *ne;
 154     int ret;
 155     ne = X509_NAME_ENTRY_create_by_NID(NULL, nid, type, bytes, len);
 156     if (!ne)
 157         return 0;
 158     ret = X509_NAME_add_entry(name, ne, loc, set);
 159     X509_NAME_ENTRY_free(ne);
 160     return ret;
 161 }
 162
 163 int X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type,
 164                                const unsigned char *bytes, int len, int loc,
 165                                int set)
 166 {
 167     X509_NAME_ENTRY *ne;
 168     int ret;
 169     ne = X509_NAME_ENTRY_create_by_txt(NULL, field, type, bytes, len);
 170     if (!ne)
 171         return 0;
 172     ret = X509_NAME_add_entry(name, ne, loc, set);
 173     X509_NAME_ENTRY_free(ne);
 174     return ret;
 175 }
 176
 177 /*
 178  * if set is -1, append to previous set, 0 'a new one', and 1, prepend to the
 179  * guy we are about to stomp on.
 180  */
 181 int X509_NAME_add_entry(X509_NAME *name, const X509_NAME_ENTRY *ne, int loc,
 182                         int set)
 183 {
 184     X509_NAME_ENTRY *new_name = NULL;
 185     int n, i, inc;
 186     STACK_OF(X509_NAME_ENTRY) *sk;
 187
 188     if (name == NULL)
 189         return (0);
 190     sk = name->entries;
 191     n = sk_X509_NAME_ENTRY_num(sk);
 192     if (loc > n)
 193         loc = n;
 194     else if (loc < 0)
 195         loc = n;
 196
 197     name->modified = 1;
 198
 199     if (set == -1) {
 200         if (loc == 0) {
 201             set = 0;
 202             inc = 1;
 203         } else {
 204             set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set;
 205             inc = 0;
 206         }
 207     } else {                    /* if (set >= 0) */
 208
 209         if (loc >= n) {
 210             if (loc != 0)
 211                 set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set + 1;
 212             else
 213                 set = 0;
 214         } else
 215             set = sk_X509_NAME_ENTRY_value(sk, loc)->set;
 216         inc = (set == 0) ? 1 : 0;
 217     }
 218
 219     /*
 220      * X509_NAME_ENTRY_dup is ASN1 generated code, that can't be easily
 221      * const'ified; harmless cast as dup() don't modify its input.
 222      */
 223     if ((new_name = X509_NAME_ENTRY_dup((X509_NAME_ENTRY *)ne)) == NULL)
 224         goto err;
 225     new_name->set = set;
 226     if (!sk_X509_NAME_ENTRY_insert(sk, new_name, loc)) {
 227         X509err(X509_F_X509_NAME_ADD_ENTRY, ERR_R_MALLOC_FAILURE);
 228         goto err;
 229     }
 230     if (inc) {
 231         n = sk_X509_NAME_ENTRY_num(sk);
 232         for (i = loc + 1; i < n; i++)
 233             sk_X509_NAME_ENTRY_value(sk, i - 1)->set += 1;
 234     }
 235     return 1;
 236  err:
 237     X509_NAME_ENTRY_free(new_name);
 238     return (0);
 239 }
 240
 241 X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_txt(X509_NAME_ENTRY **ne,
 242                                                const char *field, int type,
 243                                                const unsigned char *bytes,
 244                                                int len)
 245 {
 246     ASN1_OBJECT *obj;
 247     X509_NAME_ENTRY *nentry;
 248
 249     obj = OBJ_txt2obj(field, 0);
 250     if (obj == NULL) {
 251         X509err(X509_F_X509_NAME_ENTRY_CREATE_BY_TXT,
 252                 X509_R_INVALID_FIELD_NAME);
 253         ERR_add_error_data(2, "name=", field);
 254         return (NULL);
 255     }
 256     nentry = X509_NAME_ENTRY_create_by_OBJ(ne, obj, type, bytes, len);
 257     ASN1_OBJECT_free(obj);
 258     return nentry;
 259 }
 260
 261 X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid,
 262                                                int type,
 263                                                const unsigned char *bytes,
 264                                                int len)
 265 {
 266     ASN1_OBJECT *obj;
 267     X509_NAME_ENTRY *nentry;
 268
 269     obj = OBJ_nid2obj(nid);
 270     if (obj == NULL) {
 271         X509err(X509_F_X509_NAME_ENTRY_CREATE_BY_NID, X509_R_UNKNOWN_NID);
 272         return (NULL);
 273     }
 274     nentry = X509_NAME_ENTRY_create_by_OBJ(ne, obj, type, bytes, len);
 275     ASN1_OBJECT_free(obj);
 276     return nentry;
 277 }
 278
 279 X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_OBJ(X509_NAME_ENTRY **ne,
 280                                                const ASN1_OBJECT *obj, int type,
 281                                                const unsigned char *bytes,
 282                                                int len)
 283 {
 284     X509_NAME_ENTRY *ret;
 285
 286     if ((ne == NULL) || (*ne == NULL)) {
 287         if ((ret = X509_NAME_ENTRY_new()) == NULL)
 288             return (NULL);
 289     } else
 290         ret = *ne;
 291
 292     if (!X509_NAME_ENTRY_set_object(ret, obj))
 293         goto err;
 294     if (!X509_NAME_ENTRY_set_data(ret, type, bytes, len))
 295         goto err;
 296
 297     if ((ne != NULL) && (*ne == NULL))
 298         *ne = ret;
 299     return (ret);
 300  err:
 301     if ((ne == NULL) || (ret != *ne))
 302         X509_NAME_ENTRY_free(ret);
 303     return (NULL);
 304 }
 305
 306 int X509_NAME_ENTRY_set_object(X509_NAME_ENTRY *ne, const ASN1_OBJECT *obj)
 307 {
 308     if ((ne == NULL) || (obj == NULL)) {
 309         X509err(X509_F_X509_NAME_ENTRY_SET_OBJECT,
 310                 ERR_R_PASSED_NULL_PARAMETER);
 311         return (0);
 312     }
 313     ASN1_OBJECT_free(ne->object);
 314     ne->object = OBJ_dup(obj);
 315     return ((ne->object == NULL) ? 0 : 1);
 316 }
 317
 318 int X509_NAME_ENTRY_set_data(X509_NAME_ENTRY *ne, int type,
 319                              const unsigned char *bytes, int len)
 320 {
 321     int i;
 322
 323     if ((ne == NULL) || ((bytes == NULL) && (len != 0)))
 324         return (0);
 325     if ((type > 0) && (type & MBSTRING_FLAG))
 326         return ASN1_STRING_set_by_NID(&ne->value, bytes,
 327                                       len, type,
 328                                       OBJ_obj2nid(ne->object)) ? 1 : 0;
 329     if (len < 0)
 330         len = strlen((const char *)bytes);
 331     i = ASN1_STRING_set(ne->value, bytes, len);
 332     if (!i)
 333         return (0);
 334     if (type != V_ASN1_UNDEF) {
 335         if (type == V_ASN1_APP_CHOOSE)
 336             ne->value->type = ASN1_PRINTABLE_type(bytes, len);
 337         else
 338             ne->value->type = type;
 339     }
 340     return 1;
 341 }
 342
 343 ASN1_OBJECT *X509_NAME_ENTRY_get_object(const X509_NAME_ENTRY *ne)
 344 {
 345     if (ne == NULL)
 346         return (NULL);
 347     return (ne->object);
 348 }
 349
 350 ASN1_STRING *X509_NAME_ENTRY_get_data(const X509_NAME_ENTRY *ne)
 351 {
 352     if (ne == NULL)
 353         return (NULL);
 354     return (ne->value);
 355 }
 356
 357 int X509_NAME_ENTRY_set(const X509_NAME_ENTRY *ne)
 358 {
 359     return ne->set;
 360 }