1 /* v3_pci.c -*- mode:C; c-file-style: "eay" -*- */ 2 /* Contributed to the OpenSSL Project 2004 3 * by Richard Levitte (richard (at) levitte.org) 4 */ 5 /* Copyright (c) 2004 Kungliga Tekniska Hgskolan 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 39 #include <openssl/conf.h> 40 #include <openssl/err.h> 41 #include <openssl/mem.h> 42 #include <openssl/obj.h> 43 #include <openssl/x509v3.h> 44 45 46 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext, 47 BIO *out, int indent); 48 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method, 49 X509V3_CTX *ctx, char *str); 50 51 const X509V3_EXT_METHOD v3_pci = 52 { NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION), 53 0,0,0,0, 54 0,0, 55 NULL, NULL, 56 (X509V3_EXT_I2R)i2r_pci, 57 (X509V3_EXT_R2I)r2i_pci, 58 NULL, 59 }; 60 61 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci, 62 BIO *out, int indent) 63 { 64 BIO_printf(out, "%*sPath Length Constraint: ", indent, ""); 65 if (pci->pcPathLengthConstraint) 66 i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint); 67 else 68 BIO_printf(out, "infinite"); 69 BIO_puts(out, "\n"); 70 BIO_printf(out, "%*sPolicy Language: ", indent, ""); 71 i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage); 72 BIO_puts(out, "\n"); 73 if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data) 74 BIO_printf(out, "%*sPolicy Text: %s\n", indent, "", 75 pci->proxyPolicy->policy->data); 76 return 1; 77 } 78 79 static int process_pci_value(CONF_VALUE *val, 80 ASN1_OBJECT **language, ASN1_INTEGER **pathlen, 81 ASN1_OCTET_STRING **policy) 82 { 83 int free_policy = 0; 84 85 if (strcmp(val->name, "language") == 0) 86 { 87 if (*language) 88 { 89 OPENSSL_PUT_ERROR(X509V3, process_pci_value, X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED); 90 X509V3_conf_err(val); 91 return 0; 92 } 93 if (!(*language = OBJ_txt2obj(val->value, 0))) 94 { 95 OPENSSL_PUT_ERROR(X509V3, process_pci_value, X509V3_R_INVALID_OBJECT_IDENTIFIER); 96 X509V3_conf_err(val); 97 return 0; 98 } 99 } 100 else if (strcmp(val->name, "pathlen") == 0) 101 { 102 if (*pathlen) 103 { 104 OPENSSL_PUT_ERROR(X509V3, process_pci_value, X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED); 105 X509V3_conf_err(val); 106 return 0; 107 } 108 if (!X509V3_get_value_int(val, pathlen)) 109 { 110 OPENSSL_PUT_ERROR(X509V3, process_pci_value, X509V3_R_POLICY_PATH_LENGTH); 111 X509V3_conf_err(val); 112 return 0; 113 } 114 } 115 else if (strcmp(val->name, "policy") == 0) 116 { 117 unsigned char *tmp_data = NULL; 118 long val_len; 119 if (!*policy) 120 { 121 *policy = ASN1_OCTET_STRING_new(); 122 if (!*policy) 123 { 124 OPENSSL_PUT_ERROR(X509V3, process_pci_value, ERR_R_MALLOC_FAILURE); 125 X509V3_conf_err(val); 126 return 0; 127 } 128 free_policy = 1; 129 } 130 if (strncmp(val->value, "hex:", 4) == 0) 131 { 132 unsigned char *tmp_data2 = 133 string_to_hex(val->value + 4, &val_len); 134 135 if (!tmp_data2) 136 { 137 OPENSSL_PUT_ERROR(X509V3, process_pci_value, X509V3_R_ILLEGAL_HEX_DIGIT); 138 X509V3_conf_err(val); 139 goto err; 140 } 141 142 tmp_data = OPENSSL_realloc((*policy)->data, 143 (*policy)->length + val_len + 1); 144 if (tmp_data) 145 { 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 } 152 else 153 { 154 OPENSSL_free(tmp_data2); 155 /* realloc failure implies the original data space is b0rked too! */ 156 (*policy)->data = NULL; 157 (*policy)->length = 0; 158 OPENSSL_PUT_ERROR(X509V3, process_pci_value, ERR_R_MALLOC_FAILURE); 159 X509V3_conf_err(val); 160 goto err; 161 } 162 OPENSSL_free(tmp_data2); 163 } 164 else if (strncmp(val->value, "file:", 5) == 0) 165 { 166 unsigned char buf[2048]; 167 int n; 168 BIO *b = BIO_new_file(val->value + 5, "r"); 169 if (!b) 170 { 171 OPENSSL_PUT_ERROR(X509V3, process_pci_value, ERR_R_BIO_LIB); 172 X509V3_conf_err(val); 173 goto err; 174 } 175 while((n = BIO_read(b, buf, sizeof(buf))) > 0 176 || (n == 0 && BIO_should_retry(b))) 177 { 178 if (!n) continue; 179 180 tmp_data = OPENSSL_realloc((*policy)->data, 181 (*policy)->length + n + 1); 182 183 if (!tmp_data) 184 break; 185 186 (*policy)->data = tmp_data; 187 memcpy(&(*policy)->data[(*policy)->length], 188 buf, n); 189 (*policy)->length += n; 190 (*policy)->data[(*policy)->length] = '\0'; 191 } 192 BIO_free_all(b); 193 194 if (n < 0) 195 { 196 OPENSSL_PUT_ERROR(X509V3, process_pci_value, ERR_R_BIO_LIB); 197 X509V3_conf_err(val); 198 goto err; 199 } 200 } 201 else if (strncmp(val->value, "text:", 5) == 0) 202 { 203 val_len = strlen(val->value + 5); 204 tmp_data = OPENSSL_realloc((*policy)->data, 205 (*policy)->length + val_len + 1); 206 if (tmp_data) 207 { 208 (*policy)->data = tmp_data; 209 memcpy(&(*policy)->data[(*policy)->length], 210 val->value + 5, val_len); 211 (*policy)->length += val_len; 212 (*policy)->data[(*policy)->length] = '\0'; 213 } 214 else 215 { 216 /* realloc failure implies the original data space is b0rked too! */ 217 (*policy)->data = NULL; 218 (*policy)->length = 0; 219 OPENSSL_PUT_ERROR(X509V3, process_pci_value, ERR_R_MALLOC_FAILURE); 220 X509V3_conf_err(val); 221 goto err; 222 } 223 } 224 else 225 { 226 OPENSSL_PUT_ERROR(X509V3, process_pci_value, X509V3_R_INCORRECT_POLICY_SYNTAX_TAG); 227 X509V3_conf_err(val); 228 goto err; 229 } 230 if (!tmp_data) 231 { 232 OPENSSL_PUT_ERROR(X509V3, process_pci_value, ERR_R_MALLOC_FAILURE); 233 X509V3_conf_err(val); 234 goto err; 235 } 236 } 237 return 1; 238 err: 239 if (free_policy) 240 { 241 ASN1_OCTET_STRING_free(*policy); 242 *policy = NULL; 243 } 244 return 0; 245 } 246 247 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method, 248 X509V3_CTX *ctx, char *value) 249 { 250 PROXY_CERT_INFO_EXTENSION *pci = NULL; 251 STACK_OF(CONF_VALUE) *vals; 252 ASN1_OBJECT *language = NULL; 253 ASN1_INTEGER *pathlen = NULL; 254 ASN1_OCTET_STRING *policy = NULL; 255 size_t i, j; 256 int nid; 257 258 vals = X509V3_parse_list(value); 259 for (i = 0; i < sk_CONF_VALUE_num(vals); i++) 260 { 261 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i); 262 if (!cnf->name || (*cnf->name != '@' && !cnf->value)) 263 { 264 OPENSSL_PUT_ERROR(X509V3, r2i_pci, X509V3_R_INVALID_PROXY_POLICY_SETTING); 265 X509V3_conf_err(cnf); 266 goto err; 267 } 268 if (*cnf->name == '@') 269 { 270 STACK_OF(CONF_VALUE) *sect; 271 int success_p = 1; 272 273 sect = X509V3_get_section(ctx, cnf->name + 1); 274 if (!sect) 275 { 276 OPENSSL_PUT_ERROR(X509V3, r2i_pci, X509V3_R_INVALID_SECTION); 277 X509V3_conf_err(cnf); 278 goto err; 279 } 280 for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) 281 { 282 success_p = 283 process_pci_value(sk_CONF_VALUE_value(sect, j), 284 &language, &pathlen, &policy); 285 } 286 X509V3_section_free(ctx, sect); 287 if (!success_p) 288 goto err; 289 } 290 else 291 { 292 if (!process_pci_value(cnf, 293 &language, &pathlen, &policy)) 294 { 295 X509V3_conf_err(cnf); 296 goto err; 297 } 298 } 299 } 300 301 /* Language is mandatory */ 302 if (!language) 303 { 304 OPENSSL_PUT_ERROR(X509V3, r2i_pci, X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED); 305 goto err; 306 } 307 nid = OBJ_obj2nid(language); 308 if ((nid == NID_Independent || nid == NID_id_ppl_inheritAll) && policy) 309 { 310 OPENSSL_PUT_ERROR(X509V3, r2i_pci, X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY); 311 goto err; 312 } 313 314 pci = PROXY_CERT_INFO_EXTENSION_new(); 315 if (!pci) 316 { 317 OPENSSL_PUT_ERROR(X509V3, r2i_pci, ERR_R_MALLOC_FAILURE); 318 goto err; 319 } 320 321 pci->proxyPolicy->policyLanguage = language; language = NULL; 322 pci->proxyPolicy->policy = policy; policy = NULL; 323 pci->pcPathLengthConstraint = pathlen; pathlen = NULL; 324 goto end; 325 err: 326 if (language) { ASN1_OBJECT_free(language); language = NULL; } 327 if (pathlen) { ASN1_INTEGER_free(pathlen); pathlen = NULL; } 328 if (policy) { ASN1_OCTET_STRING_free(policy); policy = NULL; } 329 if (pci) { PROXY_CERT_INFO_EXTENSION_free(pci); pci = NULL; } 330 end: 331 sk_CONF_VALUE_pop_free(vals, X509V3_conf_free); 332 return pci; 333 } 334
