crypto/x509/x509name.c

   1 /*
   2  * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 "crypto/x509.h"
  18
  19 DEFINE_STACK_OF(X509_NAME_ENTRY)
  20
  21 int X509_NAME_get_text_by_NID(const X509_NAME *name, int nid,
  22                               char *buf, int len)
  23 {
  24     ASN1_OBJECT *obj;
  25
  26     obj = OBJ_nid2obj(nid);
  27     if (obj == NULL)
  28         return -1;
  29     return X509_NAME_get_text_by_OBJ(name, obj, buf, len);
  30 }
  31
  32 int X509_NAME_get_text_by_OBJ(const X509_NAME *name, const ASN1_OBJECT *obj,
  33                               char *buf, int len)
  34 {
  35     int i;
  36     const ASN1_STRING *data;
  37
  38     i = X509_NAME_get_index_by_OBJ(name, obj, -1);
  39     if (i < 0)
  40         return -1;
  41     data = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name, i));
  42     if (buf == NULL)
  43         return data->length;
  44     if (len <= 0)
  45         return 0;
  46     i = (data->length > (len - 1)) ? (len - 1) : data->length;
  47     memcpy(buf, data->data, i);
  48     buf[i] = '\0';
  49     return i;
  50 }
  51
  52 int X509_NAME_entry_count(const X509_NAME *name)
  53 {
  54     if (name == NULL)
  55         return 0;
  56     return sk_X509_NAME_ENTRY_num(name->entries);
  57 }
  58
  59 int X509_NAME_get_index_by_NID(const X509_NAME *name, int nid, int lastpos)
  60 {
  61     ASN1_OBJECT *obj;
  62
  63     obj = OBJ_nid2obj(nid);
  64     if (obj == NULL)
  65         return -2;
  66     return X509_NAME_get_index_by_OBJ(name, obj, lastpos);
  67 }
  68
  69 /* NOTE: you should be passing -1, not 0 as lastpos */
  70 int X509_NAME_get_index_by_OBJ(const X509_NAME *name, const ASN1_OBJECT *obj,
  71                                int lastpos)
  72 {
  73     int n;
  74     X509_NAME_ENTRY *ne;
  75     STACK_OF(X509_NAME_ENTRY) *sk;
  76
  77     if (name == NULL)
  78         return -1;
  79     if (lastpos < 0)
  80         lastpos = -1;
  81     sk = name->entries;
  82     n = sk_X509_NAME_ENTRY_num(sk);
  83     for (lastpos++; lastpos < n; lastpos++) {
  84         ne = sk_X509_NAME_ENTRY_value(sk, lastpos);
  85         if (OBJ_cmp(ne->object, obj) == 0)
  86             return lastpos;
  87     }
  88     return -1;
  89 }
  90
  91 X509_NAME_ENTRY *X509_NAME_get_entry(const X509_NAME *name, int loc)
  92 {
  93     if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc
  94         || loc < 0)
  95         return NULL;
  96
  97     return sk_X509_NAME_ENTRY_value(name->entries, loc);
  98 }
  99
 100 X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *name, int loc)
 101 {
 102     X509_NAME_ENTRY *ret;
 103     int i, n, set_prev, set_next;
 104     STACK_OF(X509_NAME_ENTRY) *sk;
 105
 106     if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc
 107         || loc < 0)
 108         return NULL;
 109
 110     sk = name->entries;
 111     ret = sk_X509_NAME_ENTRY_delete(sk, loc);
 112     n = sk_X509_NAME_ENTRY_num(sk);
 113     name->modified = 1;
 114     if (loc == n)
 115         return ret;
 116
 117     /* else we need to fixup the set field */
 118     if (loc != 0)
 119         set_prev = (sk_X509_NAME_ENTRY_value(sk, loc - 1))->set;
 120     else
 121         set_prev = ret->set - 1;
 122     set_next = sk_X509_NAME_ENTRY_value(sk, loc)->set;
 123
 124     /*-
 125      * set_prev is the previous set
 126      * set is the current set
 127      * set_next is the following
 128      * prev  1 1    1 1     1 1     1 1
 129      * set   1      1       2       2
 130      * next  1 1    2 2     2 2     3 2
 131      * so basically only if prev and next differ by 2, then
 132      * re-number down by 1
 133      */
 134     if (set_prev + 1 < set_next)
 135         for (i = loc; i < n; i++)
 136             sk_X509_NAME_ENTRY_value(sk, i)->set--;
 137     return ret;
 138 }
 139
 140 int X509_NAME_add_entry_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int type,
 141                                const unsigned char *bytes, int len, int loc,
 142                                int set)
 143 {
 144     X509_NAME_ENTRY *ne;
 145     int ret;
 146
 147     ne = X509_NAME_ENTRY_create_by_OBJ(NULL, obj, type, bytes, len);
 148     if (!ne)
 149         return 0;
 150     ret = X509_NAME_add_entry(name, ne, loc, set);
 151     X509_NAME_ENTRY_free(ne);
 152     return ret;
 153 }
 154
 155 int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type,
 156                                const unsigned char *bytes, int len, int loc,
 157                                int set)
 158 {
 159     X509_NAME_ENTRY *ne;
 160     int ret;
 161     ne = X509_NAME_ENTRY_create_by_NID(NULL, nid, type, bytes, len);
 162     if (!ne)
 163         return 0;
 164     ret = X509_NAME_add_entry(name, ne, loc, set);
 165     X509_NAME_ENTRY_free(ne);
 166     return ret;
 167 }
 168
 169 int X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type,
 170                                const unsigned char *bytes, int len, int loc,
 171                                int set)
 172 {
 173     X509_NAME_ENTRY *ne;
 174     int ret;
 175     ne = X509_NAME_ENTRY_create_by_txt(NULL, field, type, bytes, len);
 176     if (!ne)
 177         return 0;
 178     ret = X509_NAME_add_entry(name, ne, loc, set);
 179     X509_NAME_ENTRY_free(ne);
 180     return ret;
 181 }
 182
 183 /*
 184  * if set is -1, append to previous set, 0 'a new one', and 1, prepend to the
 185  * guy we are about to stomp on.
 186  */
 187 int X509_NAME_add_entry(X509_NAME *name, const X509_NAME_ENTRY *ne, int loc,
 188                         int set)
 189 {
 190     X509_NAME_ENTRY *new_name = NULL;
 191     int n, i, inc;
 192     STACK_OF(X509_NAME_ENTRY) *sk;
 193
 194     if (name == NULL)
 195         return 0;
 196     sk = name->entries;
 197     n = sk_X509_NAME_ENTRY_num(sk);
 198     if (loc > n)
 199         loc = n;
 200     else if (loc < 0)
 201         loc = n;
 202     inc = (set == 0);
 203     name->modified = 1;
 204
 205     if (set == -1) {
 206         if (loc == 0) {
 207             set = 0;
 208             inc = 1;
 209         } else {
 210             set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set;
 211         }
 212     } else {                    /* if (set >= 0) */
 213
 214         if (loc >= n) {
 215             if (loc != 0)
 216                 set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set + 1;
 217             else
 218                 set = 0;
 219         } else
 220             set = sk_X509_NAME_ENTRY_value(sk, loc)->set;
 221     }
 222
 223     if ((new_name = X509_NAME_ENTRY_dup(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)->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 }