crypto/x509v3/v3_pci.c

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