crypto/x509v3/v3_pci.c

   1 /* v3_pci.c -*- mode:C; c-file-style: "eay" -*- */
   2 /* Contributed to the OpenSSL Project 2004
   3  * by Richard Levitte (richard@levitte.org)
   4  */
   5 /* Copyright (c) 2004 Kungliga Tekniska Högskolan
   6  * (Royal Institute of Technology, Stockholm, Sweden).
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * 3. Neither the name of the Institute nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #include <stdio.h>
  38 #include "cryptlib.h"
  39 #include <openssl/conf.h>
  40 #include <openssl/x509v3.h>
  41
  42 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
  43         BIO *out, int indent);
  44 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
  45         X509V3_CTX *ctx, char *str);
  46
  47 const X509V3_EXT_METHOD v3_pci =
  48         { NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
  49           0,0,0,0,
  50           0,0,
  51           NULL, NULL,
  52           (X509V3_EXT_I2R)i2r_pci,
  53           (X509V3_EXT_R2I)r2i_pci,
  54           NULL,
  55         };
  56
  57 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci,
  58         BIO *out, int indent)
  59         {
  60         BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
  61         if (pci->pcPathLengthConstraint)
  62           i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
  63         else
  64           BIO_printf(out, "infinite");
  65         BIO_puts(out, "\n");
  66         BIO_printf(out, "%*sPolicy Language: ", indent, "");
  67         i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
  68         BIO_puts(out, "\n");
  69         if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
  70           BIO_printf(out, "%*sPolicy Text: %s\n", indent, "",
  71                      pci->proxyPolicy->policy->data);
  72         return 1;
  73         }
  74
  75 static int process_pci_value(CONF_VALUE *val,
  76         ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
  77         ASN1_OCTET_STRING **policy)
  78         {
  79         int free_policy = 0;
  80
  81         if (strcmp(val->name, "language") == 0)
  82                 {
  83                 if (*language)
  84                         {
  85                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
  86                         X509V3_conf_err(val);
  87                         return 0;
  88                         }
  89                 if (!(*language = OBJ_txt2obj(val->value, 0)))
  90                         {
  91                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_INVALID_OBJECT_IDENTIFIER);
  92                         X509V3_conf_err(val);
  93                         return 0;
  94                         }
  95                 }
  96         else if (strcmp(val->name, "pathlen") == 0)
  97                 {
  98                 if (*pathlen)
  99                         {
 100                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
 101                         X509V3_conf_err(val);
 102                         return 0;
 103                         }
 104                 if (!X509V3_get_value_int(val, pathlen))
 105                         {
 106                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_POLICY_PATH_LENGTH);
 107                         X509V3_conf_err(val);
 108                         return 0;
 109                         }
 110                 }
 111         else if (strcmp(val->name, "policy") == 0)
 112                 {
 113                 unsigned char *tmp_data = NULL;
 114                 long val_len;
 115                 if (!*policy)
 116                         {
 117                         *policy = ASN1_OCTET_STRING_new();
 118                         if (!*policy)
 119                                 {
 120                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
 121                                 X509V3_conf_err(val);
 122                                 return 0;
 123                                 }
 124                         free_policy = 1;
 125                         }
 126                 if (strncmp(val->value, "hex:", 4) == 0)
 127                         {
 128                         unsigned char *tmp_data2 =
 129                                 string_to_hex(val->value + 4, &val_len);
 130
 131                         if (!tmp_data2)
 132                                 {
 133                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_ILLEGAL_HEX_DIGIT);
 134                                 X509V3_conf_err(val);
 135                                 goto err;
 136                                 }
 137
 138                         tmp_data = OPENSSL_realloc((*policy)->data,
 139                                 (*policy)->length + val_len + 1);
 140                         if (tmp_data)
 141                                 {
 142                                 (*policy)->data = tmp_data;
 143                                 memcpy(&(*policy)->data[(*policy)->length],
 144                                         tmp_data2, val_len);
 145                                 (*policy)->length += val_len;
 146                                 (*policy)->data[(*policy)->length] = '\0';
 147                                 }
 148                         else
 149                                 {
 150                                 OPENSSL_free(tmp_data2);
 151                                 /* realloc failure implies the original data space is b0rked too! */
 152                                 (*policy)->data = NULL;
 153                                 (*policy)->length = 0;
 154                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
 155                                 X509V3_conf_err(val);
 156                                 goto err;
 157                                 }
 158                         OPENSSL_free(tmp_data2);
 159                         }
 160                 else if (strncmp(val->value, "file:", 5) == 0)
 161                         {
 162                         unsigned char buf[2048];
 163                         int n;
 164                         BIO *b = BIO_new_file(val->value + 5, "r");
 165                         if (!b)
 166                                 {
 167                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB);
 168                                 X509V3_conf_err(val);
 169                                 goto err;
 170                                 }
 171                         while((n = BIO_read(b, buf, sizeof(buf))) > 0
 172                                 || (n == 0 && BIO_should_retry(b)))
 173                                 {
 174                                 if (!n) continue;
 175
 176                                 tmp_data = OPENSSL_realloc((*policy)->data,
 177                                         (*policy)->length + n + 1);
 178
 179                                 if (!tmp_data)
 180                                         break;
 181
 182                                 (*policy)->data = tmp_data;
 183                                 memcpy(&(*policy)->data[(*policy)->length],
 184                                         buf, n);
 185                                 (*policy)->length += n;
 186                                 (*policy)->data[(*policy)->length] = '\0';
 187                                 }
 188                         BIO_free_all(b);
 189
 190                         if (n < 0)
 191                                 {
 192                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB);
 193                                 X509V3_conf_err(val);
 194                                 goto err;
 195                                 }
 196                         }
 197                 else if (strncmp(val->value, "text:", 5) == 0)
 198                         {
 199                         val_len = strlen(val->value + 5);
 200                         tmp_data = OPENSSL_realloc((*policy)->data,
 201                                 (*policy)->length + val_len + 1);
 202                         if (tmp_data)
 203                                 {
 204                                 (*policy)->data = tmp_data;
 205                                 memcpy(&(*policy)->data[(*policy)->length],
 206                                         val->value + 5, val_len);
 207                                 (*policy)->length += val_len;
 208                                 (*policy)->data[(*policy)->length] = '\0';
 209                                 }
 210                         else
 211                                 {
 212                                 /* realloc failure implies the original data space is b0rked too! */
 213                                 (*policy)->data = NULL;
 214                                 (*policy)->length = 0;
 215                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
 216                                 X509V3_conf_err(val);
 217                                 goto err;
 218                                 }
 219                         }
 220                 else
 221                         {
 222                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
 223                         X509V3_conf_err(val);
 224                         goto err;
 225                         }
 226                 if (!tmp_data)
 227                         {
 228                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
 229                         X509V3_conf_err(val);
 230                         goto err;
 231                         }
 232                 }
 233         return 1;
 234 err:
 235         if (free_policy)
 236                 {
 237                 ASN1_OCTET_STRING_free(*policy);
 238                 *policy = NULL;
 239                 }
 240         return 0;
 241         }
 242
 243 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
 244         X509V3_CTX *ctx, char *value)
 245         {
 246         PROXY_CERT_INFO_EXTENSION *pci = NULL;
 247         STACK_OF(CONF_VALUE) *vals;
 248         ASN1_OBJECT *language = NULL;
 249         ASN1_INTEGER *pathlen = NULL;
 250         ASN1_OCTET_STRING *policy = NULL;
 251         int i, j;
 252
 253         vals = X509V3_parse_list(value);
 254         for (i = 0; i < sk_CONF_VALUE_num(vals); i++)
 255                 {
 256                 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
 257                 if (!cnf->name || (*cnf->name != '@' && !cnf->value))
 258                         {
 259                         X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_PROXY_POLICY_SETTING);
 260                         X509V3_conf_err(cnf);
 261                         goto err;
 262                         }
 263                 if (*cnf->name == '@')
 264                         {
 265                         STACK_OF(CONF_VALUE) *sect;
 266                         int success_p = 1;
 267
 268                         sect = X509V3_get_section(ctx, cnf->name + 1);
 269                         if (!sect)
 270                                 {
 271                                 X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_SECTION);
 272                                 X509V3_conf_err(cnf);
 273                                 goto err;
 274                                 }
 275                         for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++)
 276                                 {
 277                                 success_p =
 278                                         process_pci_value(sk_CONF_VALUE_value(sect, j),
 279                                                 &language, &pathlen, &policy);
 280                                 }
 281                         X509V3_section_free(ctx, sect);
 282                         if (!success_p)
 283                                 goto err;
 284                         }
 285                 else
 286                         {
 287                         if (!process_pci_value(cnf,
 288                                         &language, &pathlen, &policy))
 289                                 {
 290                                 X509V3_conf_err(cnf);
 291                                 goto err;
 292                                 }
 293                         }
 294                 }
 295
 296         /* Language is mandatory */
 297         if (!language)
 298                 {
 299                 X509V3err(X509V3_F_R2I_PCI,X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
 300                 goto err;
 301                 }
 302         i = OBJ_obj2nid(language);
 303         if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy)
 304                 {
 305                 X509V3err(X509V3_F_R2I_PCI,X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
 306                 goto err;
 307                 }
 308
 309         pci = PROXY_CERT_INFO_EXTENSION_new();
 310         if (!pci)
 311                 {
 312                 X509V3err(X509V3_F_R2I_PCI,ERR_R_MALLOC_FAILURE);
 313                 goto err;
 314                 }
 315
 316         pci->proxyPolicy->policyLanguage = language; language = NULL;
 317         pci->proxyPolicy->policy = policy; policy = NULL;
 318         pci->pcPathLengthConstraint = pathlen; pathlen = NULL;
 319         goto end;
 320 err:
 321         if (language) { ASN1_OBJECT_free(language); language = NULL; }
 322         if (pathlen) { ASN1_INTEGER_free(pathlen); pathlen = NULL; }
 323         if (policy) { ASN1_OCTET_STRING_free(policy); policy = NULL; }
 324         if (pci) { PROXY_CERT_INFO_EXTENSION_free(pci); pci = NULL; }
 325 end:
 326         sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 327         return pci;
 328         }