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 #include "asn1_locl.h"
  64
  65 static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in, long len, const ASN1_ITEM *it,
  66                                         int tag, int aclass, char opt, ASN1_TLC *ctx);
  67
  68 static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
  69 static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);
  70 static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);
  71
  72 static int x509_name_encode(X509_NAME *a);
  73
  74
  75 static int x509_name_ex_print(BIO *out, ASN1_VALUE **pval,
  76                                                 int indent,
  77                                                 const char *fname,
  78                                                 const ASN1_PCTX *pctx);
  79
  80 ASN1_SEQUENCE(X509_NAME_ENTRY) = {
  81         ASN1_SIMPLE(X509_NAME_ENTRY, object, ASN1_OBJECT),
  82         ASN1_SIMPLE(X509_NAME_ENTRY, value, ASN1_PRINTABLE)
  83 } ASN1_SEQUENCE_END(X509_NAME_ENTRY)
  84
  85 IMPLEMENT_ASN1_FUNCTIONS(X509_NAME_ENTRY)
  86 IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME_ENTRY)
  87
  88 /* For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY }
  89  * so declare two template wrappers for this
  90  */
  91
  92 ASN1_ITEM_TEMPLATE(X509_NAME_ENTRIES) =
  93         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_OF, 0, RDNS, X509_NAME_ENTRY)
  94 ASN1_ITEM_TEMPLATE_END(X509_NAME_ENTRIES)
  95
  96 ASN1_ITEM_TEMPLATE(X509_NAME_INTERNAL) =
  97         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, Name, X509_NAME_ENTRIES)
  98 ASN1_ITEM_TEMPLATE_END(X509_NAME_INTERNAL)
  99
 100 /* Normally that's where it would end: we'd have two nested STACK structures
 101  * representing the ASN1. Unfortunately X509_NAME uses a completely different
 102  * form and caches encodings so we have to process the internal form and convert
 103  * to the external form.
 104  */
 105
 106 const ASN1_EXTERN_FUNCS x509_name_ff = {
 107         NULL,
 108         x509_name_ex_new,
 109         x509_name_ex_free,
 110         0,      /* Default clear behaviour is OK */
 111         x509_name_ex_d2i,
 112         x509_name_ex_i2d,
 113         x509_name_ex_print
 114 };
 115
 116 IMPLEMENT_EXTERN_ASN1(X509_NAME, V_ASN1_SEQUENCE, x509_name_ff)
 117
 118 IMPLEMENT_ASN1_FUNCTIONS(X509_NAME)
 119 IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME)
 120
 121 static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)
 122 {
 123         X509_NAME *ret = NULL;
 124         ret = OPENSSL_malloc(sizeof(X509_NAME));
 125         if(!ret) goto memerr;
 126         if ((ret->entries=sk_X509_NAME_ENTRY_new_null()) == NULL)
 127                 goto memerr;
 128         if((ret->bytes = BUF_MEM_new()) == NULL) goto memerr;
 129         ret->modified=1;
 130         *val = (ASN1_VALUE *)ret;
 131         return 1;
 132
 133  memerr:
 134         ASN1err(ASN1_F_X509_NAME_EX_NEW, ERR_R_MALLOC_FAILURE);
 135         if (ret)
 136                 {
 137                 if (ret->entries)
 138                         sk_X509_NAME_ENTRY_free(ret->entries);
 139                 OPENSSL_free(ret);
 140                 }
 141         return 0;
 142 }
 143
 144 static void x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
 145 {
 146         X509_NAME *a;
 147         if(!pval || !*pval)
 148             return;
 149         a = (X509_NAME *)*pval;
 150
 151         BUF_MEM_free(a->bytes);
 152         sk_X509_NAME_ENTRY_pop_free(a->entries,X509_NAME_ENTRY_free);
 153         OPENSSL_free(a);
 154         *pval = NULL;
 155 }
 156
 157 /* Used with sk_pop_free() to free up the internal representation.
 158  * NB: we only free the STACK and not its contents because it is
 159  * already present in the X509_NAME structure.
 160  */
 161
 162 static void sk_internal_free(void *a)
 163 {
 164         sk_free(a);
 165 }
 166
 167 static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in, long len, const ASN1_ITEM *it,
 168                                         int tag, int aclass, char opt, ASN1_TLC *ctx)
 169 {
 170         const unsigned char *p = *in, *q;
 171         STACK *intname = NULL, **intname_pp = &intname;
 172         int i, j, ret;
 173         X509_NAME *nm = NULL, **nm_pp = &nm;
 174         STACK_OF(X509_NAME_ENTRY) *entries;
 175         X509_NAME_ENTRY *entry;
 176         q = p;
 177
 178         /* Get internal representation of Name */
 179         ret = ASN1_item_ex_d2i((ASN1_VALUE **)intname_pp,
 180                                &p, len, ASN1_ITEM_rptr(X509_NAME_INTERNAL),
 181                                tag, aclass, opt, ctx);
 182
 183         if(ret <= 0) return ret;
 184
 185         if(*val) x509_name_ex_free(val, NULL);
 186         if(!x509_name_ex_new((ASN1_VALUE **)nm_pp, NULL)) goto err;
 187         /* We've decoded it: now cache encoding */
 188         if(!BUF_MEM_grow(nm->bytes, p - q)) goto err;
 189         memcpy(nm->bytes->data, q, p - q);
 190
 191         /* Convert internal representation to X509_NAME structure */
 192         for(i = 0; i < sk_num(intname); i++) {
 193                 entries = (STACK_OF(X509_NAME_ENTRY) *)sk_value(intname, i);
 194                 for(j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {
 195                         entry = sk_X509_NAME_ENTRY_value(entries, j);
 196                         entry->set = i;
 197                         if(!sk_X509_NAME_ENTRY_push(nm->entries, entry))
 198                                 goto err;
 199                 }
 200                 sk_X509_NAME_ENTRY_free(entries);
 201         }
 202         sk_free(intname);
 203         nm->modified = 0;
 204         *val = (ASN1_VALUE *)nm;
 205         *in = p;
 206         return ret;
 207         err:
 208         ASN1err(ASN1_F_X509_NAME_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
 209         return 0;
 210 }
 211
 212 static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass)
 213 {
 214         int ret;
 215         X509_NAME *a = (X509_NAME *)*val;
 216         if(a->modified) {
 217                 ret = x509_name_encode((X509_NAME *)a);
 218                 if(ret < 0) return ret;
 219         }
 220         ret = a->bytes->length;
 221         if(out != NULL) {
 222                 memcpy(*out,a->bytes->data,ret);
 223                 *out+=ret;
 224         }
 225         return ret;
 226 }
 227
 228 static int x509_name_encode(X509_NAME *a)
 229 {
 230         STACK *intname = NULL, **intname_pp = &intname;
 231         int len;
 232         unsigned char *p;
 233         STACK_OF(X509_NAME_ENTRY) *entries = NULL;
 234         X509_NAME_ENTRY *entry;
 235         int i, set = -1;
 236         intname = sk_new_null();
 237         if(!intname) goto memerr;
 238         for(i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
 239                 entry = sk_X509_NAME_ENTRY_value(a->entries, i);
 240                 if(entry->set != set) {
 241                         entries = sk_X509_NAME_ENTRY_new_null();
 242                         if(!entries) goto memerr;
 243                         if(!sk_push(intname, (char *)entries)) goto memerr;
 244                         set = entry->set;
 245                 }
 246                 if(!sk_X509_NAME_ENTRY_push(entries, entry)) goto memerr;
 247         }
 248         len = ASN1_item_ex_i2d((ASN1_VALUE **)intname_pp, NULL,
 249                                ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
 250         if (!BUF_MEM_grow(a->bytes,len)) goto memerr;
 251         p=(unsigned char *)a->bytes->data;
 252         ASN1_item_ex_i2d((ASN1_VALUE **)intname_pp,
 253                          &p, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
 254         sk_pop_free(intname, sk_internal_free);
 255         a->modified = 0;
 256         return len;
 257         memerr:
 258         sk_pop_free(intname, sk_internal_free);
 259         ASN1err(ASN1_F_X509_NAME_ENCODE, ERR_R_MALLOC_FAILURE);
 260         return -1;
 261 }
 262
 263 static int x509_name_ex_print(BIO *out, ASN1_VALUE **pval,
 264                                                 int indent,
 265                                                 const char *fname,
 266                                                 const ASN1_PCTX *pctx)
 267         {
 268         if (X509_NAME_print_ex(out, (X509_NAME *)*pval,
 269                                         indent, pctx->nm_flags) <= 0)
 270                 return 0;
 271         return 1;
 272         }
 273
 274
 275 int X509_NAME_set(X509_NAME **xn, X509_NAME *name)
 276         {
 277         X509_NAME *in;
 278
 279         if (!xn || !name) return(0);
 280
 281         if (*xn != name)
 282                 {
 283                 in=X509_NAME_dup(name);
 284                 if (in != NULL)
 285                         {
 286                         X509_NAME_free(*xn);
 287                         *xn=in;
 288                         }
 289                 }
 290         return(*xn != NULL);
 291         }
 292
 293 IMPLEMENT_STACK_OF(X509_NAME_ENTRY)
 294 IMPLEMENT_ASN1_SET_OF(X509_NAME_ENTRY)