crypto/x509v3/v3_pci.c

   1 /*
   2  * Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /* Copyright (c) 2004 Kungliga Tekniska Högskolan
  11  * (Royal Institute of Technology, Stockholm, Sweden).
  12  * All rights reserved.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  *
  18  * 1. Redistributions of source code must retain the above copyright
  19  *    notice, this list of conditions and the following disclaimer.
  20  *
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  *
  25  * 3. Neither the name of the Institute nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  */
  41
  42 #include <stdio.h>
  43 #include "internal/cryptlib.h"
  44 #include <openssl/conf.h>
  45 #include <openssl/x509v3.h>
  46 #include "ext_dat.h"
  47
  48 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
  49                    BIO *out, int indent);
  50 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
  51                                           X509V3_CTX *ctx, char *str);
  52
  53 const X509V3_EXT_METHOD v3_pci =
  54     { NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
  55     0, 0, 0, 0,
  56     0, 0,
  57     NULL, NULL,
  58     (X509V3_EXT_I2R)i2r_pci,
  59     (X509V3_EXT_R2I)r2i_pci,
  60     NULL,
  61 };
  62
  63 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci,
  64                    BIO *out, int indent)
  65 {
  66     BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
  67     if (pci->pcPathLengthConstraint)
  68         i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
  69     else
  70         BIO_printf(out, "infinite");
  71     BIO_puts(out, "\n");
  72     BIO_printf(out, "%*sPolicy Language: ", indent, "");
  73     i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
  74     BIO_puts(out, "\n");
  75     if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
  76         BIO_printf(out, "%*sPolicy Text: %s\n", indent, "",
  77                    pci->proxyPolicy->policy->data);
  78     return 1;
  79 }
  80
  81 static int process_pci_value(CONF_VALUE *val,
  82                              ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
  83                              ASN1_OCTET_STRING **policy)
  84 {
  85     int free_policy = 0;
  86
  87     if (strcmp(val->name, "language") == 0) {
  88         if (*language) {
  89             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
  90                       X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
  91             X509V3_conf_err(val);
  92             return 0;
  93         }
  94         if ((*language = OBJ_txt2obj(val->value, 0)) == NULL) {
  95             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
  96                       X509V3_R_INVALID_OBJECT_IDENTIFIER);
  97             X509V3_conf_err(val);
  98             return 0;
  99         }
 100     } else if (strcmp(val->name, "pathlen") == 0) {
 101         if (*pathlen) {
 102             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 103                       X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
 104             X509V3_conf_err(val);
 105             return 0;
 106         }
 107         if (!X509V3_get_value_int(val, pathlen)) {
 108             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 109                       X509V3_R_POLICY_PATH_LENGTH);
 110             X509V3_conf_err(val);
 111             return 0;
 112         }
 113     } else if (strcmp(val->name, "policy") == 0) {
 114         unsigned char *tmp_data = NULL;
 115         long val_len;
 116         if (!*policy) {
 117             *policy = ASN1_OCTET_STRING_new();
 118             if (*policy == NULL) {
 119                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 120                 X509V3_conf_err(val);
 121                 return 0;
 122             }
 123             free_policy = 1;
 124         }
 125         if (strncmp(val->value, "hex:", 4) == 0) {
 126             unsigned char *tmp_data2 =
 127                 OPENSSL_hexstr2buf(val->value + 4, &val_len);
 128
 129             if (!tmp_data2) {
 130                 X509V3_conf_err(val);
 131                 goto err;
 132             }
 133
 134             tmp_data = OPENSSL_realloc((*policy)->data,
 135                                        (*policy)->length + val_len + 1);
 136             if (tmp_data) {
 137                 (*policy)->data = tmp_data;
 138                 memcpy(&(*policy)->data[(*policy)->length],
 139                        tmp_data2, val_len);
 140                 (*policy)->length += val_len;
 141                 (*policy)->data[(*policy)->length] = '\0';
 142             } else {
 143                 OPENSSL_free(tmp_data2);
 144                 /*
 145                  * realloc failure implies the original data space is b0rked
 146                  * too!
 147                  */
 148                 OPENSSL_free((*policy)->data);
 149                 (*policy)->data = NULL;
 150                 (*policy)->length = 0;
 151                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 152                 X509V3_conf_err(val);
 153                 goto err;
 154             }
 155             OPENSSL_free(tmp_data2);
 156         } else if (strncmp(val->value, "file:", 5) == 0) {
 157             unsigned char buf[2048];
 158             int n;
 159             BIO *b = BIO_new_file(val->value + 5, "r");
 160             if (!b) {
 161                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
 162                 X509V3_conf_err(val);
 163                 goto err;
 164             }
 165             while ((n = BIO_read(b, buf, sizeof(buf))) > 0
 166                    || (n == 0 && BIO_should_retry(b))) {
 167                 if (!n)
 168                     continue;
 169
 170                 tmp_data = OPENSSL_realloc((*policy)->data,
 171                                            (*policy)->length + n + 1);
 172
 173                 if (!tmp_data) {
 174                     OPENSSL_free((*policy)->data);
 175                     (*policy)->data = NULL;
 176                     (*policy)->length = 0;
 177                     X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 178                               ERR_R_MALLOC_FAILURE);
 179                     X509V3_conf_err(val);
 180                     BIO_free_all(b);
 181                     goto err;
 182                 }
 183
 184                 (*policy)->data = tmp_data;
 185                 memcpy(&(*policy)->data[(*policy)->length], buf, n);
 186                 (*policy)->length += n;
 187                 (*policy)->data[(*policy)->length] = '\0';
 188             }
 189             BIO_free_all(b);
 190
 191             if (n < 0) {
 192                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
 193                 X509V3_conf_err(val);
 194                 goto err;
 195             }
 196         } else if (strncmp(val->value, "text:", 5) == 0) {
 197             val_len = strlen(val->value + 5);
 198             tmp_data = OPENSSL_realloc((*policy)->data,
 199                                        (*policy)->length + val_len + 1);
 200             if (tmp_data) {
 201                 (*policy)->data = tmp_data;
 202                 memcpy(&(*policy)->data[(*policy)->length],
 203                        val->value + 5, val_len);
 204                 (*policy)->length += val_len;
 205                 (*policy)->data[(*policy)->length] = '\0';
 206             } else {
 207                 /*
 208                  * realloc failure implies the original data space is b0rked
 209                  * too!
 210                  */
 211                 OPENSSL_free((*policy)->data);
 212                 (*policy)->data = NULL;
 213                 (*policy)->length = 0;
 214                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 215                 X509V3_conf_err(val);
 216                 goto err;
 217             }
 218         } else {
 219             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 220                       X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
 221             X509V3_conf_err(val);
 222             goto err;
 223         }
 224         if (!tmp_data) {
 225             X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 226             X509V3_conf_err(val);
 227             goto err;
 228         }
 229     }
 230     return 1;
 231  err:
 232     if (free_policy) {
 233         ASN1_OCTET_STRING_free(*policy);
 234         *policy = NULL;
 235     }
 236     return 0;
 237 }
 238
 239 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
 240                                           X509V3_CTX *ctx, char *value)
 241 {
 242     PROXY_CERT_INFO_EXTENSION *pci = NULL;
 243     STACK_OF(CONF_VALUE) *vals;
 244     ASN1_OBJECT *language = NULL;
 245     ASN1_INTEGER *pathlen = NULL;
 246     ASN1_OCTET_STRING *policy = NULL;
 247     int i, j;
 248
 249     vals = X509V3_parse_list(value);
 250     for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
 251         CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
 252         if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
 253             X509V3err(X509V3_F_R2I_PCI,
 254                       X509V3_R_INVALID_PROXY_POLICY_SETTING);
 255             X509V3_conf_err(cnf);
 256             goto err;
 257         }
 258         if (*cnf->name == '@') {
 259             STACK_OF(CONF_VALUE) *sect;
 260             int success_p = 1;
 261
 262             sect = X509V3_get_section(ctx, cnf->name + 1);
 263             if (!sect) {
 264                 X509V3err(X509V3_F_R2I_PCI, X509V3_R_INVALID_SECTION);
 265                 X509V3_conf_err(cnf);
 266                 goto err;
 267             }
 268             for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
 269                 success_p =
 270                     process_pci_value(sk_CONF_VALUE_value(sect, j),
 271                                       &language, &pathlen, &policy);
 272             }
 273             X509V3_section_free(ctx, sect);
 274             if (!success_p)
 275                 goto err;
 276         } else {
 277             if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
 278                 X509V3_conf_err(cnf);
 279                 goto err;
 280             }
 281         }
 282     }
 283
 284     /* Language is mandatory */
 285     if (!language) {
 286         X509V3err(X509V3_F_R2I_PCI,
 287                   X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
 288         goto err;
 289     }
 290     i = OBJ_obj2nid(language);
 291     if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
 292         X509V3err(X509V3_F_R2I_PCI,
 293                   X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
 294         goto err;
 295     }
 296
 297     pci = PROXY_CERT_INFO_EXTENSION_new();
 298     if (pci == NULL) {
 299         X509V3err(X509V3_F_R2I_PCI, ERR_R_MALLOC_FAILURE);
 300         goto err;
 301     }
 302
 303     pci->proxyPolicy->policyLanguage = language;
 304     language = NULL;
 305     pci->proxyPolicy->policy = policy;
 306     policy = NULL;
 307     pci->pcPathLengthConstraint = pathlen;
 308     pathlen = NULL;
 309     goto end;
 310  err:
 311     ASN1_OBJECT_free(language);
 312     ASN1_INTEGER_free(pathlen);
 313     pathlen = NULL;
 314     ASN1_OCTET_STRING_free(policy);
 315     policy = NULL;
 316     PROXY_CERT_INFO_EXTENSION_free(pci);
 317     pci = NULL;
 318  end:
 319     sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 320     return pci;
 321 }