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| 1 /* ocsp_cl.c */ | |
| 2 /* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL | |
| 3 * project. */ | |
| 4 | |
| 5 /* History: | |
| 6 This file was transfered to Richard Levitte from CertCo by Kathy | |
| 7 Weinhold in mid-spring 2000 to be included in OpenSSL or released | |
| 8 as a patch kit. */ | |
| 9 | |
| 10 /* ==================================================================== | |
| 11 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. | |
| 12 * | |
| 13 * Redistribution and use in source and binary forms, with or without | |
| 14 * modification, are permitted provided that the following conditions | |
| 15 * are met: | |
| 16 * | |
| 17 * 1. Redistributions of source code must retain the above copyright | |
| 18 * notice, this list of conditions and the following disclaimer. | |
| 19 * | |
| 20 * 2. Redistributions in binary form must reproduce the above copyright | |
| 21 * notice, this list of conditions and the following disclaimer in | |
| 22 * the documentation and/or other materials provided with the | |
| 23 * distribution. | |
| 24 * | |
| 25 * 3. All advertising materials mentioning features or use of this | |
| 26 * software must display the following acknowledgment: | |
| 27 * "This product includes software developed by the OpenSSL Project | |
| 28 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
| 29 * | |
| 30 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 31 * endorse or promote products derived from this software without | |
| 32 * prior written permission. For written permission, please contact | |
| 33 * openssl-core@openssl.org. | |
| 34 * | |
| 35 * 5. Products derived from this software may not be called "OpenSSL" | |
| 36 * nor may "OpenSSL" appear in their names without prior written | |
| 37 * permission of the OpenSSL Project. | |
| 38 * | |
| 39 * 6. Redistributions of any form whatsoever must retain the following | |
| 40 * acknowledgment: | |
| 41 * "This product includes software developed by the OpenSSL Project | |
| 42 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
| 43 * | |
| 44 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 45 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 47 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 48 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 49 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 51 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 53 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 54 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 55 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 56 * ==================================================================== | |
| 57 * | |
| 58 * This product includes cryptographic software written by Eric Young | |
| 59 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 60 * Hudson (tjh@cryptsoft.com). | |
| 61 * | |
| 62 */ | |
| 63 | |
| 64 #include <stdio.h> | |
| 65 #include <time.h> | |
| 66 #include <cryptlib.h> | |
| 67 #include <openssl/objects.h> | |
| 68 #include <openssl/rand.h> | |
| 69 #include <openssl/x509.h> | |
| 70 #include <openssl/pem.h> | |
| 71 #include <openssl/x509v3.h> | |
| 72 #include <openssl/ocsp.h> | |
| 73 | |
| 74 /* Utility functions related to sending OCSP requests and extracting | |
| 75 * relevant information from the response. | |
| 76 */ | |
| 77 | |
| 78 /* Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ | |
| 79 * pointer: useful if we want to add extensions. | |
| 80 */ | |
| 81 | |
| 82 OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid) | |
| 83 { | |
| 84 OCSP_ONEREQ *one = NULL; | |
| 85 | |
| 86 if (!(one = OCSP_ONEREQ_new())) goto err; | |
| 87 if (one->reqCert) OCSP_CERTID_free(one->reqCert); | |
| 88 one->reqCert = cid; | |
| 89 if (req && | |
| 90 !sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one)) | |
| 91 goto err; | |
| 92 return one; | |
| 93 err: | |
| 94 OCSP_ONEREQ_free(one); | |
| 95 return NULL; | |
| 96 } | |
| 97 | |
| 98 /* Set requestorName from an X509_NAME structure */ | |
| 99 | |
| 100 int OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm) | |
| 101 { | |
| 102 GENERAL_NAME *gen; | |
| 103 gen = GENERAL_NAME_new(); | |
| 104 if (gen == NULL) | |
| 105 return 0; | |
| 106 if (!X509_NAME_set(&gen->d.directoryName, nm)) | |
| 107 { | |
| 108 GENERAL_NAME_free(gen); | |
| 109 return 0; | |
| 110 } | |
| 111 gen->type = GEN_DIRNAME; | |
| 112 if (req->tbsRequest->requestorName) | |
| 113 GENERAL_NAME_free(req->tbsRequest->requestorName); | |
| 114 req->tbsRequest->requestorName = gen; | |
| 115 return 1; | |
| 116 } | |
| 117 | |
| 118 | |
| 119 /* Add a certificate to an OCSP request */ | |
| 120 | |
| 121 int OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert) | |
| 122 { | |
| 123 OCSP_SIGNATURE *sig; | |
| 124 if (!req->optionalSignature) | |
| 125 req->optionalSignature = OCSP_SIGNATURE_new(); | |
| 126 sig = req->optionalSignature; | |
| 127 if (!sig) return 0; | |
| 128 if (!cert) return 1; | |
| 129 if (!sig->certs && !(sig->certs = sk_X509_new_null())) | |
| 130 return 0; | |
| 131 | |
| 132 if(!sk_X509_push(sig->certs, cert)) return 0; | |
| 133 CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509); | |
| 134 return 1; | |
| 135 } | |
| 136 | |
| 137 /* Sign an OCSP request set the requestorName to the subjec | |
| 138 * name of an optional signers certificate and include one | |
| 139 * or more optional certificates in the request. Behaves | |
| 140 * like PKCS7_sign(). | |
| 141 */ | |
| 142 | |
| 143 int OCSP_request_sign(OCSP_REQUEST *req, | |
| 144 X509 *signer, | |
| 145 EVP_PKEY *key, | |
| 146 const EVP_MD *dgst, | |
| 147 STACK_OF(X509) *certs, | |
| 148 unsigned long flags) | |
| 149 { | |
| 150 int i; | |
| 151 OCSP_SIGNATURE *sig; | |
| 152 X509 *x; | |
| 153 | |
| 154 if (!OCSP_request_set1_name(req, X509_get_subject_name(signer))) | |
| 155 goto err; | |
| 156 | |
| 157 if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new())) goto err; | |
| 158 if (key) | |
| 159 { | |
| 160 if (!X509_check_private_key(signer, key)) | |
| 161 { | |
| 162 OCSPerr(OCSP_F_OCSP_REQUEST_SIGN, OCSP_R_PRIVATE_KEY_DOE
S_NOT_MATCH_CERTIFICATE); | |
| 163 goto err; | |
| 164 } | |
| 165 if (!OCSP_REQUEST_sign(req, key, dgst)) goto err; | |
| 166 } | |
| 167 | |
| 168 if (!(flags & OCSP_NOCERTS)) | |
| 169 { | |
| 170 if(!OCSP_request_add1_cert(req, signer)) goto err; | |
| 171 for (i = 0; i < sk_X509_num(certs); i++) | |
| 172 { | |
| 173 x = sk_X509_value(certs, i); | |
| 174 if (!OCSP_request_add1_cert(req, x)) goto err; | |
| 175 } | |
| 176 } | |
| 177 | |
| 178 return 1; | |
| 179 err: | |
| 180 OCSP_SIGNATURE_free(req->optionalSignature); | |
| 181 req->optionalSignature = NULL; | |
| 182 return 0; | |
| 183 } | |
| 184 | |
| 185 /* Get response status */ | |
| 186 | |
| 187 int OCSP_response_status(OCSP_RESPONSE *resp) | |
| 188 { | |
| 189 return ASN1_ENUMERATED_get(resp->responseStatus); | |
| 190 } | |
| 191 | |
| 192 /* Extract basic response from OCSP_RESPONSE or NULL if | |
| 193 * no basic response present. | |
| 194 */ | |
| 195 | |
| 196 | |
| 197 OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *resp) | |
| 198 { | |
| 199 OCSP_RESPBYTES *rb; | |
| 200 rb = resp->responseBytes; | |
| 201 if (!rb) | |
| 202 { | |
| 203 OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NO_RESPONSE_DATA
); | |
| 204 return NULL; | |
| 205 } | |
| 206 if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic) | |
| 207 { | |
| 208 OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NOT_BASIC_RESPON
SE); | |
| 209 return NULL; | |
| 210 } | |
| 211 | |
| 212 return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP)); | |
| 213 } | |
| 214 | |
| 215 /* Return number of OCSP_SINGLERESP reponses present in | |
| 216 * a basic response. | |
| 217 */ | |
| 218 | |
| 219 int OCSP_resp_count(OCSP_BASICRESP *bs) | |
| 220 { | |
| 221 if (!bs) return -1; | |
| 222 return sk_OCSP_SINGLERESP_num(bs->tbsResponseData->responses); | |
| 223 } | |
| 224 | |
| 225 /* Extract an OCSP_SINGLERESP response with a given index */ | |
| 226 | |
| 227 OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx) | |
| 228 { | |
| 229 if (!bs) return NULL; | |
| 230 return sk_OCSP_SINGLERESP_value(bs->tbsResponseData->responses, idx); | |
| 231 } | |
| 232 | |
| 233 /* Look single response matching a given certificate ID */ | |
| 234 | |
| 235 int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last) | |
| 236 { | |
| 237 int i; | |
| 238 STACK_OF(OCSP_SINGLERESP) *sresp; | |
| 239 OCSP_SINGLERESP *single; | |
| 240 if (!bs) return -1; | |
| 241 if (last < 0) last = 0; | |
| 242 else last++; | |
| 243 sresp = bs->tbsResponseData->responses; | |
| 244 for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++) | |
| 245 { | |
| 246 single = sk_OCSP_SINGLERESP_value(sresp, i); | |
| 247 if (!OCSP_id_cmp(id, single->certId)) return i; | |
| 248 } | |
| 249 return -1; | |
| 250 } | |
| 251 | |
| 252 /* Extract status information from an OCSP_SINGLERESP structure. | |
| 253 * Note: the revtime and reason values are only set if the | |
| 254 * certificate status is revoked. Returns numerical value of | |
| 255 * status. | |
| 256 */ | |
| 257 | |
| 258 int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason, | |
| 259 ASN1_GENERALIZEDTIME **revtime, | |
| 260 ASN1_GENERALIZEDTIME **thisupd, | |
| 261 ASN1_GENERALIZEDTIME **nextupd) | |
| 262 { | |
| 263 int ret; | |
| 264 OCSP_CERTSTATUS *cst; | |
| 265 if(!single) return -1; | |
| 266 cst = single->certStatus; | |
| 267 ret = cst->type; | |
| 268 if (ret == V_OCSP_CERTSTATUS_REVOKED) | |
| 269 { | |
| 270 OCSP_REVOKEDINFO *rev = cst->value.revoked; | |
| 271 if (revtime) *revtime = rev->revocationTime; | |
| 272 if (reason) | |
| 273 { | |
| 274 if(rev->revocationReason) | |
| 275 *reason = ASN1_ENUMERATED_get(rev->revocationRea
son); | |
| 276 else *reason = -1; | |
| 277 } | |
| 278 } | |
| 279 if(thisupd) *thisupd = single->thisUpdate; | |
| 280 if(nextupd) *nextupd = single->nextUpdate; | |
| 281 return ret; | |
| 282 } | |
| 283 | |
| 284 /* This function combines the previous ones: look up a certificate ID and | |
| 285 * if found extract status information. Return 0 is successful. | |
| 286 */ | |
| 287 | |
| 288 int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status, | |
| 289 int *reason, | |
| 290 ASN1_GENERALIZEDTIME **revtime, | |
| 291 ASN1_GENERALIZEDTIME **thisupd, | |
| 292 ASN1_GENERALIZEDTIME **nextupd) | |
| 293 { | |
| 294 int i; | |
| 295 OCSP_SINGLERESP *single; | |
| 296 i = OCSP_resp_find(bs, id, -1); | |
| 297 /* Maybe check for multiple responses and give an error? */ | |
| 298 if(i < 0) return 0; | |
| 299 single = OCSP_resp_get0(bs, i); | |
| 300 i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd); | |
| 301 if(status) *status = i; | |
| 302 return 1; | |
| 303 } | |
| 304 | |
| 305 /* Check validity of thisUpdate and nextUpdate fields. It is possible that the r
equest will | |
| 306 * take a few seconds to process and/or the time wont be totally accurate. There
fore to avoid | |
| 307 * rejecting otherwise valid time we allow the times to be within 'nsec' of the
current time. | |
| 308 * Also to avoid accepting very old responses without a nextUpdate field an opti
onal maxage | |
| 309 * parameter specifies the maximum age the thisUpdate field can be. | |
| 310 */ | |
| 311 | |
| 312 int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd, ASN1_GENERALIZEDTIME *nex
tupd, long nsec, long maxsec) | |
| 313 { | |
| 314 int ret = 1; | |
| 315 time_t t_now, t_tmp; | |
| 316 time(&t_now); | |
| 317 /* Check thisUpdate is valid and not more than nsec in the future */ | |
| 318 if (!ASN1_GENERALIZEDTIME_check(thisupd)) | |
| 319 { | |
| 320 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_THISUPDATE_F
IELD); | |
| 321 ret = 0; | |
| 322 } | |
| 323 else | |
| 324 { | |
| 325 t_tmp = t_now + nsec; | |
| 326 if (X509_cmp_time(thisupd, &t_tmp) > 0) | |
| 327 { | |
| 328 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_NOT_YE
T_VALID); | |
| 329 ret = 0; | |
| 330 } | |
| 331 | |
| 332 /* If maxsec specified check thisUpdate is not more than maxsec
in the past */ | |
| 333 if (maxsec >= 0) | |
| 334 { | |
| 335 t_tmp = t_now - maxsec; | |
| 336 if (X509_cmp_time(thisupd, &t_tmp) < 0) | |
| 337 { | |
| 338 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATU
S_TOO_OLD); | |
| 339 ret = 0; | |
| 340 } | |
| 341 } | |
| 342 } | |
| 343 | |
| 344 | |
| 345 if (!nextupd) return ret; | |
| 346 | |
| 347 /* Check nextUpdate is valid and not more than nsec in the past */ | |
| 348 if (!ASN1_GENERALIZEDTIME_check(nextupd)) | |
| 349 { | |
| 350 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_NEXTUPDATE_F
IELD); | |
| 351 ret = 0; | |
| 352 } | |
| 353 else | |
| 354 { | |
| 355 t_tmp = t_now - nsec; | |
| 356 if (X509_cmp_time(nextupd, &t_tmp) < 0) | |
| 357 { | |
| 358 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_EXPIRE
D); | |
| 359 ret = 0; | |
| 360 } | |
| 361 } | |
| 362 | |
| 363 /* Also don't allow nextUpdate to precede thisUpdate */ | |
| 364 if (ASN1_STRING_cmp(nextupd, thisupd) < 0) | |
| 365 { | |
| 366 OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_NEXTUPDATE_BEFORE_THI
SUPDATE); | |
| 367 ret = 0; | |
| 368 } | |
| 369 | |
| 370 return ret; | |
| 371 } | |
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