Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 Högskolan |
| 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 | } |