legacy-libs/grpc/deps/grpc/third_party/boringssl/crypto/x509v3/v3_pci.c

   1 /* v3_pci.c -*- mode:C; c-file-style: "eay" -*- */
   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 <string.h>
  39
  40 #include <openssl/conf.h>
  41 #include <openssl/err.h>
  42 #include <openssl/mem.h>
  43 #include <openssl/obj.h>
  44 #include <openssl/x509v3.h>
  45
  46 #include "../internal.h"
  47
  48
  49 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
  50                    BIO *out, int indent);
  51 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
  52                                           X509V3_CTX *ctx, char *str);
  53
  54 const X509V3_EXT_METHOD v3_pci =
  55     { NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
  56     0, 0, 0, 0,
  57     0, 0,
  58     NULL, NULL,
  59     (X509V3_EXT_I2R)i2r_pci,
  60     (X509V3_EXT_R2I)r2i_pci,
  61     NULL,
  62 };
  63
  64 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci,
  65                    BIO *out, int indent)
  66 {
  67     BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
  68     if (pci->pcPathLengthConstraint)
  69         i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
  70     else
  71         BIO_printf(out, "infinite");
  72     BIO_puts(out, "\n");
  73     BIO_printf(out, "%*sPolicy Language: ", indent, "");
  74     i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
  75     BIO_puts(out, "\n");
  76     if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
  77         BIO_printf(out, "%*sPolicy Text: %s\n", indent, "",
  78                    pci->proxyPolicy->policy->data);
  79     return 1;
  80 }
  81
  82 static int process_pci_value(CONF_VALUE *val,
  83                              ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
  84                              ASN1_OCTET_STRING **policy)
  85 {
  86     int free_policy = 0;
  87
  88     if (strcmp(val->name, "language") == 0) {
  89         if (*language) {
  90             OPENSSL_PUT_ERROR(X509V3,
  91                               X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
  92             X509V3_conf_err(val);
  93             return 0;
  94         }
  95         if (!(*language = OBJ_txt2obj(val->value, 0))) {
  96             OPENSSL_PUT_ERROR(X509V3, 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             OPENSSL_PUT_ERROR(X509V3,
 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             OPENSSL_PUT_ERROR(X509V3, X509V3_R_POLICY_PATH_LENGTH);
 109             X509V3_conf_err(val);
 110             return 0;
 111         }
 112     } else if (strcmp(val->name, "policy") == 0) {
 113         unsigned char *tmp_data = NULL;
 114         long val_len;
 115         if (!*policy) {
 116             *policy = ASN1_OCTET_STRING_new();
 117             if (!*policy) {
 118                 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 119                 X509V3_conf_err(val);
 120                 return 0;
 121             }
 122             free_policy = 1;
 123         }
 124         if (strncmp(val->value, "hex:", 4) == 0) {
 125             unsigned char *tmp_data2 =
 126                 string_to_hex(val->value + 4, &val_len);
 127
 128             if (!tmp_data2) {
 129                 OPENSSL_PUT_ERROR(X509V3, X509V3_R_ILLEGAL_HEX_DIGIT);
 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                 OPENSSL_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                 (*policy)->data = NULL;
 149                 (*policy)->length = 0;
 150                 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 151                 X509V3_conf_err(val);
 152                 goto err;
 153             }
 154             OPENSSL_free(tmp_data2);
 155         } else if (strncmp(val->value, "text:", 5) == 0) {
 156             val_len = strlen(val->value + 5);
 157             tmp_data = OPENSSL_realloc((*policy)->data,
 158                                        (*policy)->length + val_len + 1);
 159             if (tmp_data) {
 160                 (*policy)->data = tmp_data;
 161                 OPENSSL_memcpy(&(*policy)->data[(*policy)->length],
 162                        val->value + 5, val_len);
 163                 (*policy)->length += val_len;
 164                 (*policy)->data[(*policy)->length] = '\0';
 165             } else {
 166                 /*
 167                  * realloc failure implies the original data space is b0rked
 168                  * too!
 169                  */
 170                 (*policy)->data = NULL;
 171                 (*policy)->length = 0;
 172                 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 173                 X509V3_conf_err(val);
 174                 goto err;
 175             }
 176         } else {
 177             OPENSSL_PUT_ERROR(X509V3, X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
 178             X509V3_conf_err(val);
 179             goto err;
 180         }
 181         if (!tmp_data) {
 182             OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 183             X509V3_conf_err(val);
 184             goto err;
 185         }
 186     }
 187     return 1;
 188  err:
 189     if (free_policy) {
 190         ASN1_OCTET_STRING_free(*policy);
 191         *policy = NULL;
 192     }
 193     return 0;
 194 }
 195
 196 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
 197                                           X509V3_CTX *ctx, char *value)
 198 {
 199     PROXY_CERT_INFO_EXTENSION *pci = NULL;
 200     STACK_OF(CONF_VALUE) *vals;
 201     ASN1_OBJECT *language = NULL;
 202     ASN1_INTEGER *pathlen = NULL;
 203     ASN1_OCTET_STRING *policy = NULL;
 204     size_t i, j;
 205     int nid;
 206
 207     vals = X509V3_parse_list(value);
 208     for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
 209         CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
 210         if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
 211             OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_PROXY_POLICY_SETTING);
 212             X509V3_conf_err(cnf);
 213             goto err;
 214         }
 215         if (*cnf->name == '@') {
 216             STACK_OF(CONF_VALUE) *sect;
 217             int success_p = 1;
 218
 219             sect = X509V3_get_section(ctx, cnf->name + 1);
 220             if (!sect) {
 221                 OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_SECTION);
 222                 X509V3_conf_err(cnf);
 223                 goto err;
 224             }
 225             for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
 226                 success_p =
 227                     process_pci_value(sk_CONF_VALUE_value(sect, j),
 228                                       &language, &pathlen, &policy);
 229             }
 230             X509V3_section_free(ctx, sect);
 231             if (!success_p)
 232                 goto err;
 233         } else {
 234             if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
 235                 X509V3_conf_err(cnf);
 236                 goto err;
 237             }
 238         }
 239     }
 240
 241     /* Language is mandatory */
 242     if (!language) {
 243         OPENSSL_PUT_ERROR(X509V3,
 244                           X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
 245         goto err;
 246     }
 247     nid = OBJ_obj2nid(language);
 248     if ((nid == NID_Independent || nid == NID_id_ppl_inheritAll) && policy) {
 249         OPENSSL_PUT_ERROR(X509V3,
 250                           X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
 251         goto err;
 252     }
 253
 254     pci = PROXY_CERT_INFO_EXTENSION_new();
 255     if (!pci) {
 256         OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 257         goto err;
 258     }
 259
 260     pci->proxyPolicy->policyLanguage = language;
 261     language = NULL;
 262     pci->proxyPolicy->policy = policy;
 263     policy = NULL;
 264     pci->pcPathLengthConstraint = pathlen;
 265     pathlen = NULL;
 266     goto end;
 267  err:
 268     if (language) {
 269         ASN1_OBJECT_free(language);
 270         language = NULL;
 271     }
 272     if (pathlen) {
 273         ASN1_INTEGER_free(pathlen);
 274         pathlen = NULL;
 275     }
 276     if (policy) {
 277         ASN1_OCTET_STRING_free(policy);
 278         policy = NULL;
 279     }
 280     if (pci) {
 281         PROXY_CERT_INFO_EXTENSION_free(pci);
 282         pci = NULL;
 283     }
 284  end:
 285     sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
 286     return pci;
 287 }