1 /* v3_pci.c -*- mode:C; c-file-style: "eay" -*- */ 2 /* Contributed to the OpenSSL Project 2004 3 * by Richard Levitte (richard@levitte.org) 4 */ 5 /* Copyright (c) 2004 Kungliga Tekniska H�gskolan 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 "cryptlib.h" 39 #include <openssl/conf.h> 40 #include <openssl/x509v3.h> 41 42 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext, 43 BIO *out, int indent); 44 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method, 45 X509V3_CTX *ctx, char *str); 46 47 const X509V3_EXT_METHOD v3_pci = 48 { NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION), 49 0,0,0,0, 50 0,0, 51 NULL, NULL, 52 (X509V3_EXT_I2R)i2r_pci, 53 (X509V3_EXT_R2I)r2i_pci, 54 NULL, 55 }; 56 57 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci, 58 BIO *out, int indent) 59 { 60 BIO_printf(out, "%*sPath Length Constraint: ", indent, ""); 61 if (pci->pcPathLengthConstraint) 62 i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint); 63 else 64 BIO_printf(out, "infinite"); 65 BIO_puts(out, "\n"); 66 BIO_printf(out, "%*sPolicy Language: ", indent, ""); 67 i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage); 68 BIO_puts(out, "\n"); 69 if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data) 70 BIO_printf(out, "%*sPolicy Text: %s\n", indent, "", 71 pci->proxyPolicy->policy->data); 72 return 1; 73 } 74 75 static int process_pci_value(CONF_VALUE *val, 76 ASN1_OBJECT **language, ASN1_INTEGER **pathlen, 77 ASN1_OCTET_STRING **policy) 78 { 79 int free_policy = 0; 80 81 if (strcmp(val->name, "language") == 0) 82 { 83 if (*language) 84 { 85 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED); 86 X509V3_conf_err(val); 87 return 0; 88 } 89 if (!(*language = OBJ_txt2obj(val->value, 0))) 90 { 91 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_INVALID_OBJECT_IDENTIFIER); 92 X509V3_conf_err(val); 93 return 0; 94 } 95 } 96 else if (strcmp(val->name, "pathlen") == 0) 97 { 98 if (*pathlen) 99 { 100 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED); 101 X509V3_conf_err(val); 102 return 0; 103 } 104 if (!X509V3_get_value_int(val, pathlen)) 105 { 106 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_POLICY_PATH_LENGTH); 107 X509V3_conf_err(val); 108 return 0; 109 } 110 } 111 else if (strcmp(val->name, "policy") == 0) 112 { 113 unsigned char *tmp_data = NULL; 114 long val_len; 115 if (!*policy) 116 { 117 *policy = ASN1_OCTET_STRING_new(); 118 if (!*policy) 119 { 120 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE); 121 X509V3_conf_err(val); 122 return 0; 123 } 124 free_policy = 1; 125 } 126 if (strncmp(val->value, "hex:", 4) == 0) 127 { 128 unsigned char *tmp_data2 = 129 string_to_hex(val->value + 4, &val_len); 130 131 if (!tmp_data2) 132 { 133 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_ILLEGAL_HEX_DIGIT); 134 X509V3_conf_err(val); 135 goto err; 136 } 137 138 tmp_data = OPENSSL_realloc((*policy)->data, 139 (*policy)->length + val_len + 1); 140 if (tmp_data) 141 { 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 } 148 else 149 { 150 OPENSSL_free(tmp_data2); 151 /* realloc failure implies the original data space is b0rked too! */ 152 (*policy)->data = NULL; 153 (*policy)->length = 0; 154 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE); 155 X509V3_conf_err(val); 156 goto err; 157 } 158 OPENSSL_free(tmp_data2); 159 } 160 else if (strncmp(val->value, "file:", 5) == 0) 161 { 162 unsigned char buf[2048]; 163 int n; 164 BIO *b = BIO_new_file(val->value + 5, "r"); 165 if (!b) 166 { 167 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB); 168 X509V3_conf_err(val); 169 goto err; 170 } 171 while((n = BIO_read(b, buf, sizeof(buf))) > 0 172 || (n == 0 && BIO_should_retry(b))) 173 { 174 if (!n) continue; 175 176 tmp_data = OPENSSL_realloc((*policy)->data, 177 (*policy)->length + n + 1); 178 179 if (!tmp_data) 180 break; 181 182 (*policy)->data = tmp_data; 183 memcpy(&(*policy)->data[(*policy)->length], 184 buf, n); 185 (*policy)->length += n; 186 (*policy)->data[(*policy)->length] = '\0'; 187 } 188 BIO_free_all(b); 189 190 if (n < 0) 191 { 192 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB); 193 X509V3_conf_err(val); 194 goto err; 195 } 196 } 197 else if (strncmp(val->value, "text:", 5) == 0) 198 { 199 val_len = strlen(val->value + 5); 200 tmp_data = OPENSSL_realloc((*policy)->data, 201 (*policy)->length + val_len + 1); 202 if (tmp_data) 203 { 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 } 210 else 211 { 212 /* realloc failure implies the original data space is b0rked too! */ 213 (*policy)->data = NULL; 214 (*policy)->length = 0; 215 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE); 216 X509V3_conf_err(val); 217 goto err; 218 } 219 } 220 else 221 { 222 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_INCORRECT_POLICY_SYNTAX_TAG); 223 X509V3_conf_err(val); 224 goto err; 225 } 226 if (!tmp_data) 227 { 228 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE); 229 X509V3_conf_err(val); 230 goto err; 231 } 232 } 233 return 1; 234 err: 235 if (free_policy) 236 { 237 ASN1_OCTET_STRING_free(*policy); 238 *policy = NULL; 239 } 240 return 0; 241 } 242 243 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method, 244 X509V3_CTX *ctx, char *value) 245 { 246 PROXY_CERT_INFO_EXTENSION *pci = NULL; 247 STACK_OF(CONF_VALUE) *vals; 248 ASN1_OBJECT *language = NULL; 249 ASN1_INTEGER *pathlen = NULL; 250 ASN1_OCTET_STRING *policy = NULL; 251 int i, j; 252 253 vals = X509V3_parse_list(value); 254 for (i = 0; i < sk_CONF_VALUE_num(vals); i++) 255 { 256 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i); 257 if (!cnf->name || (*cnf->name != '@' && !cnf->value)) 258 { 259 X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_PROXY_POLICY_SETTING); 260 X509V3_conf_err(cnf); 261 goto err; 262 } 263 if (*cnf->name == '@') 264 { 265 STACK_OF(CONF_VALUE) *sect; 266 int success_p = 1; 267 268 sect = X509V3_get_section(ctx, cnf->name + 1); 269 if (!sect) 270 { 271 X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_SECTION); 272 X509V3_conf_err(cnf); 273 goto err; 274 } 275 for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) 276 { 277 success_p = 278 process_pci_value(sk_CONF_VALUE_value(sect, j), 279 &language, &pathlen, &policy); 280 } 281 X509V3_section_free(ctx, sect); 282 if (!success_p) 283 goto err; 284 } 285 else 286 { 287 if (!process_pci_value(cnf, 288 &language, &pathlen, &policy)) 289 { 290 X509V3_conf_err(cnf); 291 goto err; 292 } 293 } 294 } 295 296 /* Language is mandatory */ 297 if (!language) 298 { 299 X509V3err(X509V3_F_R2I_PCI,X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED); 300 goto err; 301 } 302 i = OBJ_obj2nid(language); 303 if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) 304 { 305 X509V3err(X509V3_F_R2I_PCI,X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY); 306 goto err; 307 } 308 309 pci = PROXY_CERT_INFO_EXTENSION_new(); 310 if (!pci) 311 { 312 X509V3err(X509V3_F_R2I_PCI,ERR_R_MALLOC_FAILURE); 313 goto err; 314 } 315 316 pci->proxyPolicy->policyLanguage = language; language = NULL; 317 pci->proxyPolicy->policy = policy; policy = NULL; 318 pci->pcPathLengthConstraint = pathlen; pathlen = NULL; 319 goto end; 320 err: 321 if (language) { ASN1_OBJECT_free(language); language = NULL; } 322 if (pathlen) { ASN1_INTEGER_free(pathlen); pathlen = NULL; } 323 if (policy) { ASN1_OCTET_STRING_free(policy); policy = NULL; } 324 if (pci) { PROXY_CERT_INFO_EXTENSION_free(pci); pci = NULL; } 325 end: 326 sk_CONF_VALUE_pop_free(vals, X509V3_conf_free); 327 return pci; 328 } 329