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 H��gskolan 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 43static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext, 44 BIO *out, int indent); 45static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method, 46 X509V3_CTX *ctx, char *str); 47 48const 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 58static 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 76static 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 226static 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} 318