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                                 OPENSSL_free((*policy)->data);
 153                                 (*policy)->data = NULL;
 154                                 (*policy)->length = 0;
 155                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
 156                                 X509V3_conf_err(val);
 157                                 goto err;
 158                                 }
 159                         OPENSSL_free(tmp_data2);
 160                         }
 161                 else if (strncmp(val->value, "file:", 5) == 0)
 162                         {
 163                         unsigned char buf[2048];
 164                         int n;
 165                         BIO *b = BIO_new_file(val->value + 5, "r");
 166                         if (!b)
 167                                 {
 168                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB);
 169                                 X509V3_conf_err(val);
 170                                 goto err;
 171                                 }
 172                         while((n = BIO_read(b, buf, sizeof(buf))) > 0
 173                                 || (n == 0 && BIO_should_retry(b)))
 174                                 {
 175                                 if (!n) continue;
 176
 177                                 tmp_data = OPENSSL_realloc((*policy)->data,
 178                                         (*policy)->length + n + 1);
 179
 180                                 if (!tmp_data)
 181                                 {
 182                                         OPENSSL_free((*policy)->data);
 183                                         (*policy)->data = NULL;
 184                                         (*policy)->length = 0;
 185                                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
 186                                         X509V3_conf_err(val);
 187                                         BIO_free_all(b);
 188                                         goto err;
 189                                 }
 190
 191                                 (*policy)->data = tmp_data;
 192                                 memcpy(&(*policy)->data[(*policy)->length],
 193                                         buf, n);
 194                                 (*policy)->length += n;
 195                                 (*policy)->data[(*policy)->length] = '\0';
 196                                 }
 197                         BIO_free_all(b);
 198
 199                         if (n < 0)
 200                                 {
 201                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB);
 202                                 X509V3_conf_err(val);
 203                                 goto err;
 204                                 }
 205                         }
 206                 else if (strncmp(val->value, "text:", 5) == 0)
 207                         {
 208                         val_len = strlen(val->value + 5);
 209                         tmp_data = OPENSSL_realloc((*policy)->data,
 210                                 (*policy)->length + val_len + 1);
 211                         if (tmp_data)
 212                                 {
 213                                 (*policy)->data = tmp_data;
 214                                 memcpy(&(*policy)->data[(*policy)->length],
 215                                         val->value + 5, val_len);
 216                                 (*policy)->length += val_len;
 217                                 (*policy)->data[(*policy)->length] = '\0';
 218                                 }
 219                         else
 220                                 {
 221                                 /* realloc failure implies the original data space is b0rked too! */
 222                                 OPENSSL_free((*policy)->data);
 223                                 (*policy)->data = NULL;
 224                                 (*policy)->length = 0;
 225                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
 226                                 X509V3_conf_err(val);
 227                                 goto err;
 228                                 }
 229                         }
 230                 else
 231                         {
 232                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
 233                         X509V3_conf_err(val);
 234                         goto err;
 235                         }
 236                 if (!tmp_data)
 237                         {
 238                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
 239                         X509V3_conf_err(val);
 240                         goto err;
 241                         }
 242                 }
 243         return 1;
 244 err:
 245         if (free_policy)
 246                 {
 247                 ASN1_OCTET_STRING_free(*policy);
 248                 *policy = NULL;
 249                 }
 250         return 0;
 251         }
 252
 253 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
 254         X509V3_CTX *ctx, char *value)
 255         {
 256         PROXY_CERT_INFO_EXTENSION *pci = NULL;
 257         STACK_OF(CONF_VALUE) *vals;
 258         ASN1_OBJECT *language = NULL;
 259         ASN1_INTEGER *pathlen = NULL;
 260         ASN1_OCTET_STRING *policy = NULL;
 261         int i, j;
 262
 263         vals = X509V3_parse_list(value);
 264         for (i = 0; i < sk_CONF_VALUE_num(vals); i++)
 265                 {
 266                 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
 267                 if (!cnf->name || (*cnf->name != '@' && !cnf->value))
 268                         {
 269                         X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_PROXY_POLICY_SETTING);
 270                         X509V3_conf_err(cnf);
 271                         goto err;
 272                         }
 273                 if (*cnf->name == '@')
 274                         {
 275                         STACK_OF(CONF_VALUE) *sect;
 276                         int success_p = 1;
 277
 278                         sect = X509V3_get_section(ctx, cnf->name + 1);
 279                         if (!sect)
 280                                 {
 281                                 X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_SECTION);
 282                                 X509V3_conf_err(cnf);
 283                                 goto err;
 284                                 }
 285                         for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++)
 286                                 {
 287                                 success_p =
 288                                         process_pci_value(sk_CONF_VALUE_value(sect, j),
 289                                                 &language, &pathlen, &policy);
 290                                 }
 291                         X509V3_section_free(ctx, sect);
 292                         if (!success_p)
 293                                 goto err;
 294                         }
 295                 else
 296                         {
 297                         if (!process_pci_value(cnf,
 298                                         &language, &pathlen, &policy))
 299                                 {
 300                                 X509V3_conf_err(cnf);
 301                                 goto err;
 302                                 }
 303                         }
 304                 }
 305
 306         /* Language is mandatory */
 307         if (!language)
 308                 {
 309                 X509V3err(X509V3_F_R2I_PCI,X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
 310                 goto err;
 311                 }
 312         i = OBJ_obj2nid(language);
 313         if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy)
 314                 {
 315                 X509V3err(X509V3_F_R2I_PCI,X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
 316                 goto err;
 317                 }
 318
 319         pci = PROXY_CERT_INFO_EXTENSION_new();
 320         if (!pci)
 321                 {
 322                 X509V3err(X509V3_F_R2I_PCI,ERR_R_MALLOC_FAILURE);
 323                 goto err;
 324                 }
 325
 326         pci->proxyPolicy->policyLanguage = language; language = NULL;
 327         pci->proxyPolicy->policy = policy; policy = NULL;
 328         pci->pcPathLengthConstraint = pathlen; pathlen = NULL;
 329         goto end;
 330 err:
 331         if (language) { ASN1_OBJECT_free(language); language = NULL; }
 332         if (pathlen) { ASN1_INTEGER_free(pathlen); pathlen = NULL; }
 333         if (policy) { ASN1_OCTET_STRING_free(policy); policy = NULL; }
 334         if (pci) { PROXY_CERT_INFO_EXTENSION_free(pci); pci = NULL; }
 335 end:
 336         sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 337         return pci;
 338         }