crypto/x509/v3_pci.c

   1 /*
   2  * Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 /*
  11  * This file is dual-licensed and is also available under the following
  12  * terms:
  13  *
  14  * Copyright (c) 2004 Kungliga Tekniska Högskolan
  15  * (Royal Institute of Technology, Stockholm, Sweden).
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms, with or without
  19  * modification, are permitted provided that the following conditions
  20  * are met:
  21  *
  22  * 1. Redistributions of source code must retain the above copyright
  23  *    notice, this list of conditions and the following disclaimer.
  24  *
  25  * 2. Redistributions in binary form must reproduce the above copyright
  26  *    notice, this list of conditions and the following disclaimer in the
  27  *    documentation and/or other materials provided with the distribution.
  28  *
  29  * 3. Neither the name of the Institute nor the names of its contributors
  30  *    may be used to endorse or promote products derived from this software
  31  *    without specific prior written permission.
  32  *
  33  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  34  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  35  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  36  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  37  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  38  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  39  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  40  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  41  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  42  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  43  * SUCH DAMAGE.
  44  */
  45
  46 #include <stdio.h>
  47 #include "internal/cryptlib.h"
  48 #include <openssl/conf.h>
  49 #include <openssl/x509v3.h>
  50 #include "ext_dat.h"
  51
  52 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
  53                    BIO *out, int indent);
  54 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
  55                                           X509V3_CTX *ctx, char *str);
  56
  57 const X509V3_EXT_METHOD v3_pci =
  58     { NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
  59     0, 0, 0, 0,
  60     0, 0,
  61     NULL, NULL,
  62     (X509V3_EXT_I2R)i2r_pci,
  63     (X509V3_EXT_R2I)r2i_pci,
  64     NULL,
  65 };
  66
  67 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci,
  68                    BIO *out, int indent)
  69 {
  70     BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
  71     if (pci->pcPathLengthConstraint)
  72         i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
  73     else
  74         BIO_printf(out, "infinite");
  75     BIO_puts(out, "\n");
  76     BIO_printf(out, "%*sPolicy Language: ", indent, "");
  77     i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
  78     if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
  79         BIO_printf(out, "\n%*sPolicy Text: %s", indent, "",
  80                    pci->proxyPolicy->policy->data);
  81     return 1;
  82 }
  83
  84 static int process_pci_value(CONF_VALUE *val,
  85                              ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
  86                              ASN1_OCTET_STRING **policy)
  87 {
  88     int free_policy = 0;
  89
  90     if (strcmp(val->name, "language") == 0) {
  91         if (*language) {
  92             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
  93                       X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
  94             X509V3_conf_err(val);
  95             return 0;
  96         }
  97         if ((*language = OBJ_txt2obj(val->value, 0)) == NULL) {
  98             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
  99                       X509V3_R_INVALID_OBJECT_IDENTIFIER);
 100             X509V3_conf_err(val);
 101             return 0;
 102         }
 103     } else if (strcmp(val->name, "pathlen") == 0) {
 104         if (*pathlen) {
 105             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 106                       X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
 107             X509V3_conf_err(val);
 108             return 0;
 109         }
 110         if (!X509V3_get_value_int(val, pathlen)) {
 111             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 112                       X509V3_R_POLICY_PATH_LENGTH);
 113             X509V3_conf_err(val);
 114             return 0;
 115         }
 116     } else if (strcmp(val->name, "policy") == 0) {
 117         unsigned char *tmp_data = NULL;
 118         long val_len;
 119         if (!*policy) {
 120             *policy = ASN1_OCTET_STRING_new();
 121             if (*policy == NULL) {
 122                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 123                 X509V3_conf_err(val);
 124                 return 0;
 125             }
 126             free_policy = 1;
 127         }
 128         if (strncmp(val->value, "hex:", 4) == 0) {
 129             unsigned char *tmp_data2 =
 130                 OPENSSL_hexstr2buf(val->value + 4, &val_len);
 131
 132             if (!tmp_data2) {
 133                 X509V3_conf_err(val);
 134                 goto err;
 135             }
 136
 137             tmp_data = OPENSSL_realloc((*policy)->data,
 138                                        (*policy)->length + val_len + 1);
 139             if (tmp_data) {
 140                 (*policy)->data = tmp_data;
 141                 memcpy(&(*policy)->data[(*policy)->length],
 142                        tmp_data2, val_len);
 143                 (*policy)->length += val_len;
 144                 (*policy)->data[(*policy)->length] = '\0';
 145             } else {
 146                 OPENSSL_free(tmp_data2);
 147                 /*
 148                  * realloc failure implies the original data space is b0rked
 149                  * too!
 150                  */
 151                 OPENSSL_free((*policy)->data);
 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         } else if (strncmp(val->value, "file:", 5) == 0) {
 160             unsigned char buf[2048];
 161             int n;
 162             BIO *b = BIO_new_file(val->value + 5, "r");
 163             if (!b) {
 164                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
 165                 X509V3_conf_err(val);
 166                 goto err;
 167             }
 168             while ((n = BIO_read(b, buf, sizeof(buf))) > 0
 169                    || (n == 0 && BIO_should_retry(b))) {
 170                 if (!n)
 171                     continue;
 172
 173                 tmp_data = OPENSSL_realloc((*policy)->data,
 174                                            (*policy)->length + n + 1);
 175
 176                 if (!tmp_data) {
 177                     OPENSSL_free((*policy)->data);
 178                     (*policy)->data = NULL;
 179                     (*policy)->length = 0;
 180                     X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 181                               ERR_R_MALLOC_FAILURE);
 182                     X509V3_conf_err(val);
 183                     BIO_free_all(b);
 184                     goto err;
 185                 }
 186
 187                 (*policy)->data = tmp_data;
 188                 memcpy(&(*policy)->data[(*policy)->length], buf, n);
 189                 (*policy)->length += n;
 190                 (*policy)->data[(*policy)->length] = '\0';
 191             }
 192             BIO_free_all(b);
 193
 194             if (n < 0) {
 195                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
 196                 X509V3_conf_err(val);
 197                 goto err;
 198             }
 199         } else if (strncmp(val->value, "text:", 5) == 0) {
 200             val_len = strlen(val->value + 5);
 201             tmp_data = OPENSSL_realloc((*policy)->data,
 202                                        (*policy)->length + val_len + 1);
 203             if (tmp_data) {
 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             } else {
 210                 /*
 211                  * realloc failure implies the original data space is b0rked
 212                  * too!
 213                  */
 214                 OPENSSL_free((*policy)->data);
 215                 (*policy)->data = NULL;
 216                 (*policy)->length = 0;
 217                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 218                 X509V3_conf_err(val);
 219                 goto err;
 220             }
 221         } else {
 222             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 223                       X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
 224             X509V3_conf_err(val);
 225             goto err;
 226         }
 227         if (!tmp_data) {
 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         ASN1_OCTET_STRING_free(*policy);
 237         *policy = NULL;
 238     }
 239     return 0;
 240 }
 241
 242 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
 243                                           X509V3_CTX *ctx, char *value)
 244 {
 245     PROXY_CERT_INFO_EXTENSION *pci = NULL;
 246     STACK_OF(CONF_VALUE) *vals;
 247     ASN1_OBJECT *language = NULL;
 248     ASN1_INTEGER *pathlen = NULL;
 249     ASN1_OCTET_STRING *policy = NULL;
 250     int i, j;
 251
 252     vals = X509V3_parse_list(value);
 253     for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
 254         CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
 255         if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
 256             X509V3err(X509V3_F_R2I_PCI,
 257                       X509V3_R_INVALID_PROXY_POLICY_SETTING);
 258             X509V3_conf_err(cnf);
 259             goto err;
 260         }
 261         if (*cnf->name == '@') {
 262             STACK_OF(CONF_VALUE) *sect;
 263             int success_p = 1;
 264
 265             sect = X509V3_get_section(ctx, cnf->name + 1);
 266             if (!sect) {
 267                 X509V3err(X509V3_F_R2I_PCI, X509V3_R_INVALID_SECTION);
 268                 X509V3_conf_err(cnf);
 269                 goto err;
 270             }
 271             for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
 272                 success_p =
 273                     process_pci_value(sk_CONF_VALUE_value(sect, j),
 274                                       &language, &pathlen, &policy);
 275             }
 276             X509V3_section_free(ctx, sect);
 277             if (!success_p)
 278                 goto err;
 279         } else {
 280             if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
 281                 X509V3_conf_err(cnf);
 282                 goto err;
 283             }
 284         }
 285     }
 286
 287     /* Language is mandatory */
 288     if (!language) {
 289         X509V3err(X509V3_F_R2I_PCI,
 290                   X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
 291         goto err;
 292     }
 293     i = OBJ_obj2nid(language);
 294     if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
 295         X509V3err(X509V3_F_R2I_PCI,
 296                   X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
 297         goto err;
 298     }
 299
 300     pci = PROXY_CERT_INFO_EXTENSION_new();
 301     if (pci == NULL) {
 302         X509V3err(X509V3_F_R2I_PCI, ERR_R_MALLOC_FAILURE);
 303         goto err;
 304     }
 305
 306     pci->proxyPolicy->policyLanguage = language;
 307     language = NULL;
 308     pci->proxyPolicy->policy = policy;
 309     policy = NULL;
 310     pci->pcPathLengthConstraint = pathlen;
 311     pathlen = NULL;
 312     goto end;
 313  err:
 314     ASN1_OBJECT_free(language);
 315     ASN1_INTEGER_free(pathlen);
 316     pathlen = NULL;
 317     ASN1_OCTET_STRING_free(policy);
 318     policy = NULL;
 319     PROXY_CERT_INFO_EXTENSION_free(pci);
 320     pci = NULL;
 321  end:
 322     sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 323     return pci;
 324 }