crypto/x509v3/v3_pci.c

   1 /*
   2  * Copyright 2004-2021 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 /*
  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     BIO_puts(out, "\n");
  79     if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
  80         BIO_printf(out, "%*sPolicy Text: %.*s\n", indent, "",
  81                    pci->proxyPolicy->policy->length,
  82                    pci->proxyPolicy->policy->data);
  83     return 1;
  84 }
  85
  86 static int process_pci_value(CONF_VALUE *val,
  87                              ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
  88                              ASN1_OCTET_STRING **policy)
  89 {
  90     int free_policy = 0;
  91
  92     if (strcmp(val->name, "language") == 0) {
  93         if (*language) {
  94             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
  95                       X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
  96             X509V3_conf_err(val);
  97             return 0;
  98         }
  99         if ((*language = OBJ_txt2obj(val->value, 0)) == NULL) {
 100             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 101                       X509V3_R_INVALID_OBJECT_IDENTIFIER);
 102             X509V3_conf_err(val);
 103             return 0;
 104         }
 105     } else if (strcmp(val->name, "pathlen") == 0) {
 106         if (*pathlen) {
 107             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 108                       X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
 109             X509V3_conf_err(val);
 110             return 0;
 111         }
 112         if (!X509V3_get_value_int(val, pathlen)) {
 113             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 114                       X509V3_R_POLICY_PATH_LENGTH);
 115             X509V3_conf_err(val);
 116             return 0;
 117         }
 118     } else if (strcmp(val->name, "policy") == 0) {
 119         unsigned char *tmp_data = NULL;
 120         long val_len;
 121         if (!*policy) {
 122             *policy = ASN1_OCTET_STRING_new();
 123             if (*policy == NULL) {
 124                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 125                 X509V3_conf_err(val);
 126                 return 0;
 127             }
 128             free_policy = 1;
 129         }
 130         if (strncmp(val->value, "hex:", 4) == 0) {
 131             unsigned char *tmp_data2 =
 132                 OPENSSL_hexstr2buf(val->value + 4, &val_len);
 133
 134             if (!tmp_data2) {
 135                 X509V3_conf_err(val);
 136                 goto err;
 137             }
 138
 139             tmp_data = OPENSSL_realloc((*policy)->data,
 140                                        (*policy)->length + val_len + 1);
 141             if (tmp_data) {
 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             } else {
 148                 OPENSSL_free(tmp_data2);
 149                 /*
 150                  * realloc failure implies the original data space is b0rked
 151                  * too!
 152                  */
 153                 OPENSSL_free((*policy)->data);
 154                 (*policy)->data = NULL;
 155                 (*policy)->length = 0;
 156                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 157                 X509V3_conf_err(val);
 158                 goto err;
 159             }
 160             OPENSSL_free(tmp_data2);
 161         } else if (strncmp(val->value, "file:", 5) == 0) {
 162             unsigned char buf[2048];
 163             int n;
 164             BIO *b = BIO_new_file(val->value + 5, "r");
 165             if (!b) {
 166                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
 167                 X509V3_conf_err(val);
 168                 goto err;
 169             }
 170             while ((n = BIO_read(b, buf, sizeof(buf))) > 0
 171                    || (n == 0 && BIO_should_retry(b))) {
 172                 if (!n)
 173                     continue;
 174
 175                 tmp_data = OPENSSL_realloc((*policy)->data,
 176                                            (*policy)->length + n + 1);
 177
 178                 if (!tmp_data) {
 179                     OPENSSL_free((*policy)->data);
 180                     (*policy)->data = NULL;
 181                     (*policy)->length = 0;
 182                     X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 183                               ERR_R_MALLOC_FAILURE);
 184                     X509V3_conf_err(val);
 185                     BIO_free_all(b);
 186                     goto err;
 187                 }
 188
 189                 (*policy)->data = tmp_data;
 190                 memcpy(&(*policy)->data[(*policy)->length], buf, n);
 191                 (*policy)->length += n;
 192                 (*policy)->data[(*policy)->length] = '\0';
 193             }
 194             BIO_free_all(b);
 195
 196             if (n < 0) {
 197                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
 198                 X509V3_conf_err(val);
 199                 goto err;
 200             }
 201         } else if (strncmp(val->value, "text:", 5) == 0) {
 202             val_len = strlen(val->value + 5);
 203             tmp_data = OPENSSL_realloc((*policy)->data,
 204                                        (*policy)->length + val_len + 1);
 205             if (tmp_data) {
 206                 (*policy)->data = tmp_data;
 207                 memcpy(&(*policy)->data[(*policy)->length],
 208                        val->value + 5, val_len);
 209                 (*policy)->length += val_len;
 210                 (*policy)->data[(*policy)->length] = '\0';
 211             } else {
 212                 /*
 213                  * realloc failure implies the original data space is b0rked
 214                  * too!
 215                  */
 216                 OPENSSL_free((*policy)->data);
 217                 (*policy)->data = NULL;
 218                 (*policy)->length = 0;
 219                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 220                 X509V3_conf_err(val);
 221                 goto err;
 222             }
 223         } else {
 224             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 225                       X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
 226             X509V3_conf_err(val);
 227             goto err;
 228         }
 229         if (!tmp_data) {
 230             X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 231             X509V3_conf_err(val);
 232             goto err;
 233         }
 234     }
 235     return 1;
 236  err:
 237     if (free_policy) {
 238         ASN1_OCTET_STRING_free(*policy);
 239         *policy = NULL;
 240     }
 241     return 0;
 242 }
 243
 244 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
 245                                           X509V3_CTX *ctx, char *value)
 246 {
 247     PROXY_CERT_INFO_EXTENSION *pci = NULL;
 248     STACK_OF(CONF_VALUE) *vals;
 249     ASN1_OBJECT *language = NULL;
 250     ASN1_INTEGER *pathlen = NULL;
 251     ASN1_OCTET_STRING *policy = NULL;
 252     int i, j;
 253
 254     vals = X509V3_parse_list(value);
 255     for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
 256         CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
 257         if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
 258             X509V3err(X509V3_F_R2I_PCI,
 259                       X509V3_R_INVALID_PROXY_POLICY_SETTING);
 260             X509V3_conf_err(cnf);
 261             goto err;
 262         }
 263         if (*cnf->name == '@') {
 264             STACK_OF(CONF_VALUE) *sect;
 265             int success_p = 1;
 266
 267             sect = X509V3_get_section(ctx, cnf->name + 1);
 268             if (!sect) {
 269                 X509V3err(X509V3_F_R2I_PCI, X509V3_R_INVALID_SECTION);
 270                 X509V3_conf_err(cnf);
 271                 goto err;
 272             }
 273             for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
 274                 success_p =
 275                     process_pci_value(sk_CONF_VALUE_value(sect, j),
 276                                       &language, &pathlen, &policy);
 277             }
 278             X509V3_section_free(ctx, sect);
 279             if (!success_p)
 280                 goto err;
 281         } else {
 282             if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
 283                 X509V3_conf_err(cnf);
 284                 goto err;
 285             }
 286         }
 287     }
 288
 289     /* Language is mandatory */
 290     if (!language) {
 291         X509V3err(X509V3_F_R2I_PCI,
 292                   X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
 293         goto err;
 294     }
 295     i = OBJ_obj2nid(language);
 296     if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
 297         X509V3err(X509V3_F_R2I_PCI,
 298                   X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
 299         goto err;
 300     }
 301
 302     pci = PROXY_CERT_INFO_EXTENSION_new();
 303     if (pci == NULL) {
 304         X509V3err(X509V3_F_R2I_PCI, ERR_R_MALLOC_FAILURE);
 305         goto err;
 306     }
 307
 308     pci->proxyPolicy->policyLanguage = language;
 309     language = NULL;
 310     pci->proxyPolicy->policy = policy;
 311     policy = NULL;
 312     pci->pcPathLengthConstraint = pathlen;
 313     pathlen = NULL;
 314     goto end;
 315  err:
 316     ASN1_OBJECT_free(language);
 317     ASN1_INTEGER_free(pathlen);
 318     pathlen = NULL;
 319     ASN1_OCTET_STRING_free(policy);
 320     policy = NULL;
 321     PROXY_CERT_INFO_EXTENSION_free(pci);
 322     pci = NULL;
 323  end:
 324     sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 325     return pci;
 326 }