crypto/libressl/crypto/x509v3/v3_pci.c

   1 /* $OpenBSD: v3_pci.c,v 1.9 2015/07/19 01:20:32 doug Exp $ */
   2 /* Contributed to the OpenSSL Project 2004
   3  * by Richard Levitte (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 <string.h>
  39
  40 #include <openssl/conf.h>
  41 #include <openssl/err.h>
  42 #include <openssl/x509v3.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         .ext_nid = NID_proxyCertInfo,
  51         .ext_flags = 0,
  52         .it = ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
  53         .ext_new = NULL,
  54         .ext_free = NULL,
  55         .d2i = NULL,
  56         .i2d = NULL,
  57         .i2s = NULL,
  58         .s2i = NULL,
  59         .i2v = NULL,
  60         .v2i = NULL,
  61         .i2r = (X509V3_EXT_I2R)i2r_pci,
  62         .r2i = (X509V3_EXT_R2I)r2i_pci,
  63         .usr_data = NULL,
  64 };
  65
  66 static int
  67 i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci, BIO *out,
  68     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->data);
  82         return 1;
  83 }
  84
  85 static int
  86 process_pci_value(CONF_VALUE *val, ASN1_OBJECT **language,
  87     ASN1_INTEGER **pathlen, ASN1_OCTET_STRING **policy)
  88 {
  89         int free_policy = 0;
  90
  91         if (strcmp(val->name, "language") == 0) {
  92                 if (*language) {
  93                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,
  94                             X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
  95                         X509V3_conf_err(val);
  96                         return 0;
  97                 }
  98                 if (!(*language = OBJ_txt2obj(val->value, 0))) {
  99                         X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 100                             X509V3_R_INVALID_OBJECT_IDENTIFIER);
 101                         X509V3_conf_err(val);
 102                         return 0;
 103                 }
 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         }
 119         else if (strcmp(val->name, "policy") == 0) {
 120                 unsigned char *tmp_data = NULL;
 121                 long val_len;
 122                 if (!*policy) {
 123                         *policy = ASN1_OCTET_STRING_new();
 124                         if (!*policy) {
 125                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 126                                     ERR_R_MALLOC_FAILURE);
 127                                 X509V3_conf_err(val);
 128                                 return 0;
 129                         }
 130                         free_policy = 1;
 131                 }
 132                 if (strncmp(val->value, "hex:", 4) == 0) {
 133                         unsigned char *tmp_data2 =
 134                             string_to_hex(val->value + 4, &val_len);
 135
 136                         if (!tmp_data2) {
 137                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 138                                     X509V3_R_ILLEGAL_HEX_DIGIT);
 139                                 X509V3_conf_err(val);
 140                                 goto err;
 141                         }
 142
 143                         tmp_data = realloc((*policy)->data,
 144                             (*policy)->length + val_len + 1);
 145                         if (tmp_data) {
 146                                 (*policy)->data = tmp_data;
 147                                 memcpy(&(*policy)->data[(*policy)->length],
 148                                     tmp_data2, val_len);
 149                                 (*policy)->length += val_len;
 150                                 (*policy)->data[(*policy)->length] = '\0';
 151                         } else {
 152                                 free(tmp_data2);
 153                                 free((*policy)->data);
 154                                 (*policy)->data = NULL;
 155                                 (*policy)->length = 0;
 156                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 157                                     ERR_R_MALLOC_FAILURE);
 158                                 X509V3_conf_err(val);
 159                                 goto err;
 160                         }
 161                         free(tmp_data2);
 162                 }
 163                 else if (strncmp(val->value, "file:", 5) == 0) {
 164                         unsigned char buf[2048];
 165                         int n;
 166                         BIO *b = BIO_new_file(val->value + 5, "r");
 167                         if (!b) {
 168                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 169                                     ERR_R_BIO_LIB);
 170                                 X509V3_conf_err(val);
 171                                 goto err;
 172                         }
 173                         while ((n = BIO_read(b, buf, sizeof(buf))) > 0 ||
 174                             (n == 0 && BIO_should_retry(b))) {
 175                                 if (!n)
 176                                         continue;
 177
 178                                 tmp_data = realloc((*policy)->data,
 179                                     (*policy)->length + n + 1);
 180
 181                                 if (!tmp_data)
 182                                         break;
 183
 184                                 (*policy)->data = tmp_data;
 185                                 memcpy(&(*policy)->data[(*policy)->length],
 186                                     buf, n);
 187                                 (*policy)->length += n;
 188                                 (*policy)->data[(*policy)->length] = '\0';
 189                         }
 190                         BIO_free_all(b);
 191
 192                         if (n < 0) {
 193                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 194                                     ERR_R_BIO_LIB);
 195                                 X509V3_conf_err(val);
 196                                 goto err;
 197                         }
 198                 }
 199                 else if (strncmp(val->value, "text:", 5) == 0) {
 200                         val_len = strlen(val->value + 5);
 201                         tmp_data = 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                                 free((*policy)->data);
 211                                 (*policy)->data = NULL;
 212                                 (*policy)->length = 0;
 213                                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 214                                     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,
 226                             ERR_R_MALLOC_FAILURE);
 227                         X509V3_conf_err(val);
 228                         goto err;
 229                 }
 230         }
 231         return 1;
 232
 233 err:
 234         if (free_policy) {
 235                 ASN1_OCTET_STRING_free(*policy);
 236                 *policy = NULL;
 237         }
 238         return 0;
 239 }
 240
 241 static PROXY_CERT_INFO_EXTENSION *
 242 r2i_pci(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *value)
 243 {
 244         PROXY_CERT_INFO_EXTENSION *pci = NULL;
 245         STACK_OF(CONF_VALUE) *vals;
 246         ASN1_OBJECT *language = NULL;
 247         ASN1_INTEGER *pathlen = NULL;
 248         ASN1_OCTET_STRING *policy = NULL;
 249         int i, j;
 250
 251         vals = X509V3_parse_list(value);
 252         for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
 253                 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
 254                 if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
 255                         X509V3err(X509V3_F_R2I_PCI,
 256                             X509V3_R_INVALID_PROXY_POLICY_SETTING);
 257                         X509V3_conf_err(cnf);
 258                         goto err;
 259                 }
 260                 if (*cnf->name == '@') {
 261                         STACK_OF(CONF_VALUE) *sect;
 262                         int success_p = 1;
 263
 264                         sect = X509V3_get_section(ctx, cnf->name + 1);
 265                         if (!sect) {
 266                                 X509V3err(X509V3_F_R2I_PCI,
 267                                     X509V3_R_INVALID_SECTION);
 268                                 X509V3_conf_err(cnf);
 269                                 goto err;
 270                         }
 271                         for (j = 0; success_p &&
 272                             j < sk_CONF_VALUE_num(sect); j++) {
 273                                 success_p = process_pci_value(
 274                                     sk_CONF_VALUE_value(sect, j),
 275                                     &language, &pathlen, &policy);
 276                         }
 277                         X509V3_section_free(ctx, sect);
 278                         if (!success_p)
 279                                 goto err;
 280                 } else {
 281                         if (!process_pci_value(cnf,
 282                             &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) {
 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
 316 err:
 317         if (language) {
 318                 ASN1_OBJECT_free(language);
 319                 language = NULL;
 320         }
 321         if (pathlen) {
 322                 ASN1_INTEGER_free(pathlen);
 323                 pathlen = NULL;
 324         }
 325         if (policy) {
 326                 ASN1_OCTET_STRING_free(policy);
 327                 policy = NULL;
 328         }
 329 end:
 330         sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 331         return pci;
 332 }