1 /* $OpenBSD: x509_pci.c,v 1.1 2020/06/04 15:19:31 jsing Exp $ */ 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 <string.h> 39 40 #include <openssl/conf.h> 41 #include <openssl/err.h> 42 #include <openssl/x509v3.h> 43 44 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext, 45 BIO *out, int indent); 46 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method, 47 X509V3_CTX *ctx, char *str); 48 49 const X509V3_EXT_METHOD v3_pci = { 50 .ext_nid = NID_proxyCertInfo, 51 .ext_flags = 0, 52 .it = &PROXY_CERT_INFO_EXTENSION_it, 53 .ext_new = NULL, 54 .ext_free = NULL, 55 .d2i = NULL, 56 .i2d = NULL, 57 .i2s = NULL, 58 .s2i = NULL, 59 .i2v = NULL, 60 .v2i = NULL, 61 .i2r = (X509V3_EXT_I2R)i2r_pci, 62 .r2i = (X509V3_EXT_R2I)r2i_pci, 63 .usr_data = NULL, 64 }; 65 66 static int 67 i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci, BIO *out, 68 int indent) 69 { 70 BIO_printf(out, "%*sPath Length Constraint: ", indent, ""); 71 if (pci->pcPathLengthConstraint) 72 i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint); 73 else 74 BIO_printf(out, "infinite"); 75 BIO_puts(out, "\n"); 76 BIO_printf(out, "%*sPolicy Language: ", indent, ""); 77 i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage); 78 BIO_puts(out, "\n"); 79 if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data) 80 BIO_printf(out, "%*sPolicy Text: %s\n", indent, "", 81 pci->proxyPolicy->policy->data); 82 return 1; 83 } 84 85 static int 86 process_pci_value(CONF_VALUE *val, ASN1_OBJECT **language, 87 ASN1_INTEGER **pathlen, ASN1_OCTET_STRING **policy) 88 { 89 int free_policy = 0; 90 91 if (strcmp(val->name, "language") == 0) { 92 if (*language) { 93 X509V3error(X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED); 94 X509V3_conf_err(val); 95 return 0; 96 } 97 if (!(*language = OBJ_txt2obj(val->value, 0))) { 98 X509V3error(X509V3_R_INVALID_OBJECT_IDENTIFIER); 99 X509V3_conf_err(val); 100 return 0; 101 } 102 } 103 else if (strcmp(val->name, "pathlen") == 0) { 104 if (*pathlen) { 105 X509V3error(X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED); 106 X509V3_conf_err(val); 107 return 0; 108 } 109 if (!X509V3_get_value_int(val, pathlen)) { 110 X509V3error(X509V3_R_POLICY_PATH_LENGTH); 111 X509V3_conf_err(val); 112 return 0; 113 } 114 } 115 else if (strcmp(val->name, "policy") == 0) { 116 unsigned char *tmp_data = NULL; 117 long val_len; 118 if (!*policy) { 119 *policy = ASN1_OCTET_STRING_new(); 120 if (!*policy) { 121 X509V3error(ERR_R_MALLOC_FAILURE); 122 X509V3_conf_err(val); 123 return 0; 124 } 125 free_policy = 1; 126 } 127 if (strncmp(val->value, "hex:", 4) == 0) { 128 unsigned char *tmp_data2 = 129 string_to_hex(val->value + 4, &val_len); 130 131 if (!tmp_data2) { 132 X509V3error(X509V3_R_ILLEGAL_HEX_DIGIT); 133 X509V3_conf_err(val); 134 goto err; 135 } 136 137 tmp_data = realloc((*policy)->data, 138 (*policy)->length + val_len + 1); 139 if (tmp_data) { 140 (*policy)->data = tmp_data; 141 memcpy(&(*policy)->data[(*policy)->length], 142 tmp_data2, val_len); 143 (*policy)->length += val_len; 144 (*policy)->data[(*policy)->length] = '\0'; 145 } else { 146 free(tmp_data2); 147 free((*policy)->data); 148 (*policy)->data = NULL; 149 (*policy)->length = 0; 150 X509V3error(ERR_R_MALLOC_FAILURE); 151 X509V3_conf_err(val); 152 goto err; 153 } 154 free(tmp_data2); 155 } 156 else if (strncmp(val->value, "file:", 5) == 0) { 157 unsigned char buf[2048]; 158 int n; 159 BIO *b = BIO_new_file(val->value + 5, "r"); 160 if (!b) { 161 X509V3error(ERR_R_BIO_LIB); 162 X509V3_conf_err(val); 163 goto err; 164 } 165 while ((n = BIO_read(b, buf, sizeof(buf))) > 0 || 166 (n == 0 && BIO_should_retry(b))) { 167 if (!n) 168 continue; 169 170 tmp_data = realloc((*policy)->data, 171 (*policy)->length + n + 1); 172 173 if (!tmp_data) 174 break; 175 176 (*policy)->data = tmp_data; 177 memcpy(&(*policy)->data[(*policy)->length], 178 buf, n); 179 (*policy)->length += n; 180 (*policy)->data[(*policy)->length] = '\0'; 181 } 182 BIO_free_all(b); 183 184 if (n < 0) { 185 X509V3error(ERR_R_BIO_LIB); 186 X509V3_conf_err(val); 187 goto err; 188 } 189 } 190 else if (strncmp(val->value, "text:", 5) == 0) { 191 val_len = strlen(val->value + 5); 192 tmp_data = realloc((*policy)->data, 193 (*policy)->length + val_len + 1); 194 if (tmp_data) { 195 (*policy)->data = tmp_data; 196 memcpy(&(*policy)->data[(*policy)->length], 197 val->value + 5, val_len); 198 (*policy)->length += val_len; 199 (*policy)->data[(*policy)->length] = '\0'; 200 } else { 201 free((*policy)->data); 202 (*policy)->data = NULL; 203 (*policy)->length = 0; 204 X509V3error(ERR_R_MALLOC_FAILURE); 205 X509V3_conf_err(val); 206 goto err; 207 } 208 } else { 209 X509V3error(X509V3_R_INCORRECT_POLICY_SYNTAX_TAG); 210 X509V3_conf_err(val); 211 goto err; 212 } 213 if (!tmp_data) { 214 X509V3error(ERR_R_MALLOC_FAILURE); 215 X509V3_conf_err(val); 216 goto err; 217 } 218 } 219 return 1; 220 221 err: 222 if (free_policy) { 223 ASN1_OCTET_STRING_free(*policy); 224 *policy = NULL; 225 } 226 return 0; 227 } 228 229 static PROXY_CERT_INFO_EXTENSION * 230 r2i_pci(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *value) 231 { 232 PROXY_CERT_INFO_EXTENSION *pci = NULL; 233 STACK_OF(CONF_VALUE) *vals; 234 ASN1_OBJECT *language = NULL; 235 ASN1_INTEGER *pathlen = NULL; 236 ASN1_OCTET_STRING *policy = NULL; 237 int i, j; 238 239 vals = X509V3_parse_list(value); 240 for (i = 0; i < sk_CONF_VALUE_num(vals); i++) { 241 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i); 242 if (!cnf->name || (*cnf->name != '@' && !cnf->value)) { 243 X509V3error(X509V3_R_INVALID_PROXY_POLICY_SETTING); 244 X509V3_conf_err(cnf); 245 goto err; 246 } 247 if (*cnf->name == '@') { 248 STACK_OF(CONF_VALUE) *sect; 249 int success_p = 1; 250 251 sect = X509V3_get_section(ctx, cnf->name + 1); 252 if (!sect) { 253 X509V3error(X509V3_R_INVALID_SECTION); 254 X509V3_conf_err(cnf); 255 goto err; 256 } 257 for (j = 0; success_p && 258 j < sk_CONF_VALUE_num(sect); j++) { 259 success_p = process_pci_value( 260 sk_CONF_VALUE_value(sect, j), 261 &language, &pathlen, &policy); 262 } 263 X509V3_section_free(ctx, sect); 264 if (!success_p) 265 goto err; 266 } else { 267 if (!process_pci_value(cnf, 268 &language, &pathlen, &policy)) { 269 X509V3_conf_err(cnf); 270 goto err; 271 } 272 } 273 } 274 275 /* Language is mandatory */ 276 if (!language) { 277 X509V3error(X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED); 278 goto err; 279 } 280 i = OBJ_obj2nid(language); 281 if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) { 282 X509V3error(X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY); 283 goto err; 284 } 285 286 pci = PROXY_CERT_INFO_EXTENSION_new(); 287 if (!pci) { 288 X509V3error(ERR_R_MALLOC_FAILURE); 289 goto err; 290 } 291 292 pci->proxyPolicy->policyLanguage = language; 293 language = NULL; 294 pci->proxyPolicy->policy = policy; 295 policy = NULL; 296 pci->pcPathLengthConstraint = pathlen; 297 pathlen = NULL; 298 goto end; 299 300 err: 301 ASN1_OBJECT_free(language); 302 language = NULL; 303 ASN1_INTEGER_free(pathlen); 304 pathlen = NULL; 305 ASN1_OCTET_STRING_free(policy); 306 policy = NULL; 307 end: 308 sk_CONF_VALUE_pop_free(vals, X509V3_conf_free); 309 return pci; 310 } 311