crypto/asn1/x_name.c

   1 /* crypto/asn1/x_name.c */
   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 #include "cryptlib.h"
  61 #include <openssl/asn1t.h>
  62 #include <openssl/x509.h>
  63
  64 static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in, long len, const ASN1_ITEM *it,
  65                                         int tag, int aclass, char opt, ASN1_TLC *ctx);
  66
  67 static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
  68 static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);
  69 static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);
  70
  71 static int x509_name_encode(X509_NAME *a);
  72
  73 ASN1_SEQUENCE(X509_NAME_ENTRY) = {
  74         ASN1_SIMPLE(X509_NAME_ENTRY, object, ASN1_OBJECT),
  75         ASN1_SIMPLE(X509_NAME_ENTRY, value, ASN1_PRINTABLE)
  76 } ASN1_SEQUENCE_END(X509_NAME_ENTRY)
  77
  78 IMPLEMENT_ASN1_FUNCTIONS(X509_NAME_ENTRY)
  79 IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME_ENTRY)
  80
  81 /* For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY }
  82  * so declare two template wrappers for this
  83  */
  84
  85 ASN1_ITEM_TEMPLATE(X509_NAME_ENTRIES) =
  86         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_OF, 0, RDNS, X509_NAME_ENTRY)
  87 ASN1_ITEM_TEMPLATE_END(X509_NAME_ENTRIES)
  88
  89 ASN1_ITEM_TEMPLATE(X509_NAME_INTERNAL) =
  90         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, Name, X509_NAME_ENTRIES)
  91 ASN1_ITEM_TEMPLATE_END(X509_NAME_INTERNAL)
  92
  93 /* Normally that's where it would end: we'd have two nested STACK structures
  94  * representing the ASN1. Unfortunately X509_NAME uses a completely different
  95  * form and caches encodings so we have to process the internal form and convert
  96  * to the external form.
  97  */
  98
  99 const ASN1_EXTERN_FUNCS x509_name_ff = {
 100         NULL,
 101         x509_name_ex_new,
 102         x509_name_ex_free,
 103         0,      /* Default clear behaviour is OK */
 104         x509_name_ex_d2i,
 105         x509_name_ex_i2d
 106 };
 107
 108 IMPLEMENT_EXTERN_ASN1(X509_NAME, V_ASN1_SEQUENCE, x509_name_ff)
 109
 110 IMPLEMENT_ASN1_FUNCTIONS(X509_NAME)
 111 IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME)
 112
 113 static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)
 114 {
 115         X509_NAME *ret = NULL;
 116         ret = OPENSSL_malloc(sizeof(X509_NAME));
 117         if(!ret) goto memerr;
 118         if ((ret->entries=sk_X509_NAME_ENTRY_new_null()) == NULL)
 119                 goto memerr;
 120         if((ret->bytes = BUF_MEM_new()) == NULL) goto memerr;
 121         ret->modified=1;
 122         *val = (ASN1_VALUE *)ret;
 123         return 1;
 124
 125  memerr:
 126         ASN1err(ASN1_F_X509_NAME_NEW, ERR_R_MALLOC_FAILURE);
 127         if (ret)
 128                 {
 129                 if (ret->entries)
 130                         sk_X509_NAME_ENTRY_free(ret->entries);
 131                 OPENSSL_free(ret);
 132                 }
 133         return 0;
 134 }
 135
 136 static void x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
 137 {
 138         X509_NAME *a;
 139         if(!pval || !*pval)
 140             return;
 141         a = (X509_NAME *)*pval;
 142
 143         BUF_MEM_free(a->bytes);
 144         sk_X509_NAME_ENTRY_pop_free(a->entries,X509_NAME_ENTRY_free);
 145         OPENSSL_free(a);
 146         *pval = NULL;
 147 }
 148
 149 /* Used with sk_pop_free() to free up the internal representation.
 150  * NB: we only free the STACK and not its contents because it is
 151  * already present in the X509_NAME structure.
 152  */
 153
 154 static void sk_internal_free(void *a)
 155 {
 156         sk_free(a);
 157 }
 158
 159 static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in, long len, const ASN1_ITEM *it,
 160                                         int tag, int aclass, char opt, ASN1_TLC *ctx)
 161 {
 162         const unsigned char *p = *in, *q;
 163         STACK *intname = NULL;
 164         int i, j, ret;
 165         X509_NAME *nm = NULL;
 166         STACK_OF(X509_NAME_ENTRY) *entries;
 167         X509_NAME_ENTRY *entry;
 168         q = p;
 169
 170         /* Get internal representation of Name */
 171         ret = ASN1_item_ex_d2i((ASN1_VALUE **)&intname, &p, len, ASN1_ITEM_rptr(X509_NAME_INTERNAL),
 172                                                                 tag, aclass, opt, ctx);
 173
 174         if(ret <= 0) return ret;
 175
 176         if(*val) x509_name_ex_free(val, NULL);
 177         if(!x509_name_ex_new((ASN1_VALUE **)&nm, NULL)) goto err;
 178         /* We've decoded it: now cache encoding */
 179         if(!BUF_MEM_grow(nm->bytes, p - q)) goto err;
 180         memcpy(nm->bytes->data, q, p - q);
 181
 182         /* Convert internal representation to X509_NAME structure */
 183         for(i = 0; i < sk_num(intname); i++) {
 184                 entries = (STACK_OF(X509_NAME_ENTRY) *)sk_value(intname, i);
 185                 for(j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {
 186                         entry = sk_X509_NAME_ENTRY_value(entries, j);
 187                         entry->set = i;
 188                         if(!sk_X509_NAME_ENTRY_push(nm->entries, entry))
 189                                 goto err;
 190                 }
 191                 sk_X509_NAME_ENTRY_free(entries);
 192         }
 193         sk_free(intname);
 194         nm->modified = 0;
 195         *val = (ASN1_VALUE *)nm;
 196         *in = p;
 197         return ret;
 198         err:
 199         ASN1err(ASN1_F_D2I_X509_NAME, ERR_R_NESTED_ASN1_ERROR);
 200         return 0;
 201 }
 202
 203 static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass)
 204 {
 205         int ret;
 206         X509_NAME *a = (X509_NAME *)*val;
 207         if(a->modified) {
 208                 ret = x509_name_encode((X509_NAME *)a);
 209                 if(ret < 0) return ret;
 210         }
 211         ret = a->bytes->length;
 212         if(out != NULL) {
 213                 memcpy(*out,a->bytes->data,ret);
 214                 *out+=ret;
 215         }
 216         return ret;
 217 }
 218
 219 static int x509_name_encode(X509_NAME *a)
 220 {
 221         STACK *intname = NULL;
 222         int len;
 223         unsigned char *p;
 224         STACK_OF(X509_NAME_ENTRY) *entries = NULL;
 225         X509_NAME_ENTRY *entry;
 226         int i, set = -1;
 227         intname = sk_new_null();
 228         if(!intname) goto memerr;
 229         for(i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
 230                 entry = sk_X509_NAME_ENTRY_value(a->entries, i);
 231                 if(entry->set != set) {
 232                         entries = sk_X509_NAME_ENTRY_new_null();
 233                         if(!entries) goto memerr;
 234                         if(!sk_push(intname, (char *)entries)) goto memerr;
 235                         set = entry->set;
 236                 }
 237                 if(!sk_X509_NAME_ENTRY_push(entries, entry)) goto memerr;
 238         }
 239         len = ASN1_item_ex_i2d((ASN1_VALUE **)&intname, NULL, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
 240         if (!BUF_MEM_grow(a->bytes,len)) goto memerr;
 241         p=(unsigned char *)a->bytes->data;
 242         ASN1_item_ex_i2d((ASN1_VALUE **)&intname, &p, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
 243         sk_pop_free(intname, sk_internal_free);
 244         a->modified = 0;
 245         return len;
 246         memerr:
 247         sk_pop_free(intname, sk_internal_free);
 248         ASN1err(ASN1_F_D2I_X509_NAME, ERR_R_MALLOC_FAILURE);
 249         return -1;
 250 }
 251
 252
 253 int X509_NAME_set(X509_NAME **xn, X509_NAME *name)
 254         {
 255         X509_NAME *in;
 256
 257         if (!xn || !name) return(0);
 258
 259         if (*xn != name)
 260                 {
 261                 in=X509_NAME_dup(name);
 262                 if (in != NULL)
 263                         {
 264                         X509_NAME_free(*xn);
 265                         *xn=in;
 266                         }
 267                 }
 268         return(*xn != NULL);
 269         }
 270
 271 IMPLEMENT_STACK_OF(X509_NAME_ENTRY)
 272 IMPLEMENT_ASN1_SET_OF(X509_NAME_ENTRY)