crypto/x509v3/v3_pci.c

   1 /* v3_pci.c */
   2 /*
   3  * Contributed to the OpenSSL Project 2004 by Richard Levitte
   4  * (richard@levitte.org)
   5  */
   6 /* Copyright (c) 2004 Kungliga Tekniska Högskolan
   7  * (Royal Institute of Technology, Stockholm, Sweden).
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  *
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * 3. Neither the name of the Institute nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  */
  37
  38 #include <stdio.h>
  39 #include "cryptlib.h"
  40 #include <openssl/conf.h>
  41 #include <openssl/x509v3.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))) {
  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) {
 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                 string_to_hex(val->value + 4, &val_len);
 123
 124             if (!tmp_data2) {
 125                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 126                           X509V3_R_ILLEGAL_HEX_DIGIT);
 127                 X509V3_conf_err(val);
 128                 goto err;
 129             }
 130
 131             tmp_data = OPENSSL_realloc((*policy)->data,
 132                                        (*policy)->length + val_len + 1);
 133             if (tmp_data) {
 134                 (*policy)->data = tmp_data;
 135                 memcpy(&(*policy)->data[(*policy)->length],
 136                        tmp_data2, val_len);
 137                 (*policy)->length += val_len;
 138                 (*policy)->data[(*policy)->length] = '\0';
 139             } else {
 140                 OPENSSL_free(tmp_data2);
 141                 /*
 142                  * realloc failure implies the original data space is b0rked
 143                  * too!
 144                  */
 145                 (*policy)->data = NULL;
 146                 (*policy)->length = 0;
 147                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 148                 X509V3_conf_err(val);
 149                 goto err;
 150             }
 151             OPENSSL_free(tmp_data2);
 152         } else if (strncmp(val->value, "file:", 5) == 0) {
 153             unsigned char buf[2048];
 154             int n;
 155             BIO *b = BIO_new_file(val->value + 5, "r");
 156             if (!b) {
 157                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
 158                 X509V3_conf_err(val);
 159                 goto err;
 160             }
 161             while ((n = BIO_read(b, buf, sizeof(buf))) > 0
 162                    || (n == 0 && BIO_should_retry(b))) {
 163                 if (!n)
 164                     continue;
 165
 166                 tmp_data = OPENSSL_realloc((*policy)->data,
 167                                            (*policy)->length + n + 1);
 168
 169                 if (!tmp_data)
 170                     break;
 171
 172                 (*policy)->data = tmp_data;
 173                 memcpy(&(*policy)->data[(*policy)->length], buf, n);
 174                 (*policy)->length += n;
 175                 (*policy)->data[(*policy)->length] = '\0';
 176             }
 177             BIO_free_all(b);
 178
 179             if (n < 0) {
 180                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
 181                 X509V3_conf_err(val);
 182                 goto err;
 183             }
 184         } else if (strncmp(val->value, "text:", 5) == 0) {
 185             val_len = strlen(val->value + 5);
 186             tmp_data = OPENSSL_realloc((*policy)->data,
 187                                        (*policy)->length + val_len + 1);
 188             if (tmp_data) {
 189                 (*policy)->data = tmp_data;
 190                 memcpy(&(*policy)->data[(*policy)->length],
 191                        val->value + 5, val_len);
 192                 (*policy)->length += val_len;
 193                 (*policy)->data[(*policy)->length] = '\0';
 194             } else {
 195                 /*
 196                  * realloc failure implies the original data space is b0rked
 197                  * too!
 198                  */
 199                 (*policy)->data = NULL;
 200                 (*policy)->length = 0;
 201                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 202                 X509V3_conf_err(val);
 203                 goto err;
 204             }
 205         } else {
 206             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
 207                       X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
 208             X509V3_conf_err(val);
 209             goto err;
 210         }
 211         if (!tmp_data) {
 212             X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
 213             X509V3_conf_err(val);
 214             goto err;
 215         }
 216     }
 217     return 1;
 218  err:
 219     if (free_policy) {
 220         ASN1_OCTET_STRING_free(*policy);
 221         *policy = NULL;
 222     }
 223     return 0;
 224 }
 225
 226 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
 227                                           X509V3_CTX *ctx, char *value)
 228 {
 229     PROXY_CERT_INFO_EXTENSION *pci = NULL;
 230     STACK_OF(CONF_VALUE) *vals;
 231     ASN1_OBJECT *language = NULL;
 232     ASN1_INTEGER *pathlen = NULL;
 233     ASN1_OCTET_STRING *policy = NULL;
 234     int i, j;
 235
 236     vals = X509V3_parse_list(value);
 237     for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
 238         CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
 239         if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
 240             X509V3err(X509V3_F_R2I_PCI,
 241                       X509V3_R_INVALID_PROXY_POLICY_SETTING);
 242             X509V3_conf_err(cnf);
 243             goto err;
 244         }
 245         if (*cnf->name == '@') {
 246             STACK_OF(CONF_VALUE) *sect;
 247             int success_p = 1;
 248
 249             sect = X509V3_get_section(ctx, cnf->name + 1);
 250             if (!sect) {
 251                 X509V3err(X509V3_F_R2I_PCI, X509V3_R_INVALID_SECTION);
 252                 X509V3_conf_err(cnf);
 253                 goto err;
 254             }
 255             for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
 256                 success_p =
 257                     process_pci_value(sk_CONF_VALUE_value(sect, j),
 258                                       &language, &pathlen, &policy);
 259             }
 260             X509V3_section_free(ctx, sect);
 261             if (!success_p)
 262                 goto err;
 263         } else {
 264             if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
 265                 X509V3_conf_err(cnf);
 266                 goto err;
 267             }
 268         }
 269     }
 270
 271     /* Language is mandatory */
 272     if (!language) {
 273         X509V3err(X509V3_F_R2I_PCI,
 274                   X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
 275         goto err;
 276     }
 277     i = OBJ_obj2nid(language);
 278     if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
 279         X509V3err(X509V3_F_R2I_PCI,
 280                   X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
 281         goto err;
 282     }
 283
 284     pci = PROXY_CERT_INFO_EXTENSION_new();
 285     if (!pci) {
 286         X509V3err(X509V3_F_R2I_PCI, ERR_R_MALLOC_FAILURE);
 287         goto err;
 288     }
 289
 290     pci->proxyPolicy->policyLanguage = language;
 291     language = NULL;
 292     pci->proxyPolicy->policy = policy;
 293     policy = NULL;
 294     pci->pcPathLengthConstraint = pathlen;
 295     pathlen = NULL;
 296     goto end;
 297  err:
 298     if (language) {
 299         ASN1_OBJECT_free(language);
 300         language = NULL;
 301     }
 302     if (pathlen) {
 303         ASN1_INTEGER_free(pathlen);
 304         pathlen = NULL;
 305     }
 306     if (policy) {
 307         ASN1_OCTET_STRING_free(policy);
 308         policy = NULL;
 309     }
 310     if (pci) {
 311         PROXY_CERT_INFO_EXTENSION_free(pci);
 312         pci = NULL;
 313     }
 314  end:
 315     sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 316     return pci;
 317 }