crypto/x509v3/v3_pci.c

   1 /*
   2  * Contributed to the OpenSSL Project 2004 by Richard Levitte
   3  * (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 "internal/cryptlib.h"
  39 #include <openssl/conf.h>
  40 #include <openssl/x509v3.h>
  41 #include "ext_dat.h"
  42
  43 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
  44                    BIO *out, int indent);
  45 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
  46                                           X509V3_CTX *ctx, char *str);
  47
  48 const X509V3_EXT_METHOD v3_pci =
  49     { NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
  50     0, 0, 0, 0,
  51     0, 0,
  52     NULL, NULL,
  53     (X509V3_EXT_I2R)i2r_pci,
  54     (X509V3_EXT_R2I)r2i_pci,
  55     NULL,
  56 };
  57
  58 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci,
  59                    BIO *out, int indent)
  60 {
  61     BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
  62     if (pci->pcPathLengthConstraint)
  63         i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
  64     else
  65         BIO_printf(out, "infinite");
  66     BIO_puts(out, "\n");
  67     BIO_printf(out, "%*sPolicy Language: ", indent, "");
  68     i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
  69     BIO_puts(out, "\n");
  70     if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
  71         BIO_printf(out, "%*sPolicy Text: %s\n", indent, "",
  72                    pci->proxyPolicy->policy->data);
  73     return 1;
  74 }
  75
  76 static int process_pci_value(CONF_VALUE *val,
  77                              ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
  78                              ASN1_OCTET_STRING **policy)
  79 {
  80     int free_policy = 0;
  81
  82     if (strcmp(val->name, "language") == 0) {
  83         if (*language) {
  84             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
  85                       X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
  86             X509V3_conf_err(val);
  87             return 0;
  88         }
  89         if ((*language = OBJ_txt2obj(val->value, 0)) == NULL) {
  90             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
  91                       X509V3_R_INVALID_OBJECT_IDENTIFIER);
  92             X509V3_conf_err(val);
  93             return 0;
  94         }
  95     } else if (strcmp(val->name, "pathlen") == 0) {
  96         if (*pathlen) {
  97             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
  98                       X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
  99             X509V3_conf_err(val);
 100             return 0;
 101         }
 102         if (!X509V3_get_value_int(val, pathlen)) {
 103             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 104                       X509V3_R_POLICY_PATH_LENGTH);
 105             X509V3_conf_err(val);
 106             return 0;
 107         }
 108     } else if (strcmp(val->name, "policy") == 0) {
 109         unsigned char *tmp_data = NULL;
 110         long val_len;
 111         if (!*policy) {
 112             *policy = ASN1_OCTET_STRING_new();
 113             if (*policy == NULL) {
 114                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 115                 X509V3_conf_err(val);
 116                 return 0;
 117             }
 118             free_policy = 1;
 119         }
 120         if (strncmp(val->value, "hex:", 4) == 0) {
 121             unsigned char *tmp_data2 =
 122                 OPENSSL_hexstr2buf(val->value + 4, &val_len);
 123
 124             if (!tmp_data2) {
 125                 X509V3_conf_err(val);
 126                 goto err;
 127             }
 128
 129             tmp_data = OPENSSL_realloc((*policy)->data,
 130                                        (*policy)->length + val_len + 1);
 131             if (tmp_data) {
 132                 (*policy)->data = tmp_data;
 133                 memcpy(&(*policy)->data[(*policy)->length],
 134                        tmp_data2, val_len);
 135                 (*policy)->length += val_len;
 136                 (*policy)->data[(*policy)->length] = '\0';
 137             } else {
 138                 OPENSSL_free(tmp_data2);
 139                 /*
 140                  * realloc failure implies the original data space is b0rked
 141                  * too!
 142                  */
 143                 OPENSSL_free((*policy)->data);
 144                 (*policy)->data = NULL;
 145                 (*policy)->length = 0;
 146                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 147                 X509V3_conf_err(val);
 148                 goto err;
 149             }
 150             OPENSSL_free(tmp_data2);
 151         } else if (strncmp(val->value, "file:", 5) == 0) {
 152             unsigned char buf[2048];
 153             int n;
 154             BIO *b = BIO_new_file(val->value + 5, "r");
 155             if (!b) {
 156                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
 157                 X509V3_conf_err(val);
 158                 goto err;
 159             }
 160             while ((n = BIO_read(b, buf, sizeof(buf))) > 0
 161                    || (n == 0 && BIO_should_retry(b))) {
 162                 if (!n)
 163                     continue;
 164
 165                 tmp_data = OPENSSL_realloc((*policy)->data,
 166                                            (*policy)->length + n + 1);
 167
 168                 if (!tmp_data) {
 169                     OPENSSL_free((*policy)->data);
 170                     (*policy)->data = NULL;
 171                     (*policy)->length = 0;
 172                     X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 173                               ERR_R_MALLOC_FAILURE);
 174                     X509V3_conf_err(val);
 175                     BIO_free_all(b);
 176                     goto err;
 177                 }
 178
 179                 (*policy)->data = tmp_data;
 180                 memcpy(&(*policy)->data[(*policy)->length], buf, n);
 181                 (*policy)->length += n;
 182                 (*policy)->data[(*policy)->length] = '\0';
 183             }
 184             BIO_free_all(b);
 185
 186             if (n < 0) {
 187                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
 188                 X509V3_conf_err(val);
 189                 goto err;
 190             }
 191         } else if (strncmp(val->value, "text:", 5) == 0) {
 192             val_len = strlen(val->value + 5);
 193             tmp_data = OPENSSL_realloc((*policy)->data,
 194                                        (*policy)->length + val_len + 1);
 195             if (tmp_data) {
 196                 (*policy)->data = tmp_data;
 197                 memcpy(&(*policy)->data[(*policy)->length],
 198                        val->value + 5, val_len);
 199                 (*policy)->length += val_len;
 200                 (*policy)->data[(*policy)->length] = '\0';
 201             } else {
 202                 /*
 203                  * realloc failure implies the original data space is b0rked
 204                  * too!
 205                  */
 206                 OPENSSL_free((*policy)->data);
 207                 (*policy)->data = NULL;
 208                 (*policy)->length = 0;
 209                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 210                 X509V3_conf_err(val);
 211                 goto err;
 212             }
 213         } else {
 214             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 215                       X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
 216             X509V3_conf_err(val);
 217             goto err;
 218         }
 219         if (!tmp_data) {
 220             X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 221             X509V3_conf_err(val);
 222             goto err;
 223         }
 224     }
 225     return 1;
 226  err:
 227     if (free_policy) {
 228         ASN1_OCTET_STRING_free(*policy);
 229         *policy = NULL;
 230     }
 231     return 0;
 232 }
 233
 234 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
 235                                           X509V3_CTX *ctx, char *value)
 236 {
 237     PROXY_CERT_INFO_EXTENSION *pci = NULL;
 238     STACK_OF(CONF_VALUE) *vals;
 239     ASN1_OBJECT *language = NULL;
 240     ASN1_INTEGER *pathlen = NULL;
 241     ASN1_OCTET_STRING *policy = NULL;
 242     int i, j;
 243
 244     vals = X509V3_parse_list(value);
 245     for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
 246         CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
 247         if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
 248             X509V3err(X509V3_F_R2I_PCI,
 249                       X509V3_R_INVALID_PROXY_POLICY_SETTING);
 250             X509V3_conf_err(cnf);
 251             goto err;
 252         }
 253         if (*cnf->name == '@') {
 254             STACK_OF(CONF_VALUE) *sect;
 255             int success_p = 1;
 256
 257             sect = X509V3_get_section(ctx, cnf->name + 1);
 258             if (!sect) {
 259                 X509V3err(X509V3_F_R2I_PCI, X509V3_R_INVALID_SECTION);
 260                 X509V3_conf_err(cnf);
 261                 goto err;
 262             }
 263             for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
 264                 success_p =
 265                     process_pci_value(sk_CONF_VALUE_value(sect, j),
 266                                       &language, &pathlen, &policy);
 267             }
 268             X509V3_section_free(ctx, sect);
 269             if (!success_p)
 270                 goto err;
 271         } else {
 272             if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
 273                 X509V3_conf_err(cnf);
 274                 goto err;
 275             }
 276         }
 277     }
 278
 279     /* Language is mandatory */
 280     if (!language) {
 281         X509V3err(X509V3_F_R2I_PCI,
 282                   X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
 283         goto err;
 284     }
 285     i = OBJ_obj2nid(language);
 286     if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
 287         X509V3err(X509V3_F_R2I_PCI,
 288                   X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
 289         goto err;
 290     }
 291
 292     pci = PROXY_CERT_INFO_EXTENSION_new();
 293     if (pci == NULL) {
 294         X509V3err(X509V3_F_R2I_PCI, ERR_R_MALLOC_FAILURE);
 295         goto err;
 296     }
 297
 298     pci->proxyPolicy->policyLanguage = language;
 299     language = NULL;
 300     pci->proxyPolicy->policy = policy;
 301     policy = NULL;
 302     pci->pcPathLengthConstraint = pathlen;
 303     pathlen = NULL;
 304     goto end;
 305  err:
 306     ASN1_OBJECT_free(language);
 307     ASN1_INTEGER_free(pathlen);
 308     pathlen = NULL;
 309     ASN1_OCTET_STRING_free(policy);
 310     policy = NULL;
 311     PROXY_CERT_INFO_EXTENSION_free(pci);
 312     pci = NULL;
 313  end:
 314     sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 315     return pci;
 316 }