crypto/ocsp/ocsp_lib.c

   1 /* ocsp_lib.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 <cryptlib.h>
  66 #include <openssl/objects.h>
  67 #include <openssl/x509.h>
  68 #include <openssl/pem.h>
  69 #include <openssl/x509v3.h>
  70 #include <openssl/safestack.h>
  71 #include <openssl/ocsp.h>
  72
  73 static STACK_OF(X509_EXTENSION) *ext_dup(STACK_OF(X509_EXTENSION) *fr)
  74         {
  75         int i;
  76         STACK_OF(X509_EXTENSION) *to = NULL;
  77
  78         if (!(to = sk_X509_EXTENSION_dup(fr)))
  79                 goto err;
  80         for (i = 0; i < sk_X509_EXTENSION_num(fr); i++)
  81                 {
  82                 sk_X509_EXTENSION_set(to, i,
  83                       X509_EXTENSION_dup(sk_X509_EXTENSION_value(fr, i)));
  84                 if (! sk_X509_EXTENSION_value(to, i))
  85                         goto err;
  86                 }
  87         return to;
  88 err:
  89         if (to) sk_X509_EXTENSION_pop_free(to, X509_EXTENSION_free);
  90         return NULL;
  91         }
  92
  93 OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst,
  94                               X509_NAME *issuerName,
  95                               ASN1_BIT_STRING* issuerKey,
  96                               ASN1_INTEGER *serialNumber)
  97         {
  98         int nid;
  99         unsigned int i;
 100         X509_ALGOR *alg;
 101         OCSP_CERTID *cid = NULL;
 102         unsigned char md[EVP_MAX_MD_SIZE];
 103         EVP_MD_CTX ctx;
 104
 105         if (!(cid = OCSP_CERTID_new())) goto err;
 106
 107         alg = cid->hashAlgorithm;
 108         if (alg->algorithm != NULL) ASN1_OBJECT_free(alg->algorithm);
 109         if ((nid = EVP_MD_type(dgst)) == NID_undef)
 110                 {
 111                 OCSPerr(OCSP_F_CERT_ID_NEW,OCSP_R_UNKNOWN_NID);
 112                 goto err;
 113                 }
 114         if (!(alg->algorithm=OBJ_nid2obj(nid))) goto err;
 115         if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err;
 116         alg->parameter->type=V_ASN1_NULL;
 117
 118         if (!X509_NAME_digest(issuerName, dgst, md, &i)) goto digerr;
 119         if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i))) goto err;
 120
 121         /* Calculate the issuerKey hash, excluding tag and length */
 122         EVP_DigestInit(&ctx,dgst);
 123         EVP_DigestUpdate(&ctx,issuerKey->data, issuerKey->length);
 124         EVP_DigestFinal(&ctx,md,&i);
 125
 126         if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i))) goto err;
 127
 128         if (cid->serialNumber != NULL) ASN1_INTEGER_free(cid->serialNumber);
 129         if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber))) goto err;
 130         return cid;
 131 digerr:
 132         OCSPerr(OCSP_F_CERT_ID_NEW,OCSP_R_DIGEST_ERR);
 133 err:
 134         if (cid) OCSP_CERTID_free(cid);
 135         return NULL;
 136         }
 137
 138 OCSP_CERTSTATUS *OCSP_cert_status_new(int status, int reason, char *tim)
 139         {
 140         OCSP_REVOKEDINFO *ri;
 141         OCSP_CERTSTATUS *cs = NULL;
 142
 143         if (!(cs = OCSP_CERTSTATUS_new())) goto err;
 144         if ((cs->type = status) == V_OCSP_CERTSTATUS_REVOKED)
 145                 {
 146                 if (!time)
 147                         {
 148                         OCSPerr(OCSP_F_CERT_STATUS_NEW,OCSP_R_REVOKED_NO_TIME);
 149                         goto err;
 150                         }
 151                 if (!(cs->value.revoked = ri = OCSP_REVOKEDINFO_new())) goto err;
 152                 if (!ASN1_GENERALIZEDTIME_set_string(ri->revocationTime,tim))
 153                         goto err;
 154                 if (reason != OCSP_REVOKED_STATUS_NOSTATUS)
 155                         {
 156                         if (!(ri->revocationReason = ASN1_ENUMERATED_new()))
 157                                 goto err;
 158                         if (!(ASN1_ENUMERATED_set(ri->revocationReason,
 159                                                   reason)))
 160                                 goto err;
 161                         }
 162                 }
 163         return cs;
 164 err:
 165         if (cs) OCSP_CERTSTATUS_free(cs);
 166         return NULL;
 167         }
 168
 169 OCSP_REQUEST *OCSP_request_new(X509_NAME* name,
 170                                STACK_OF(X509_EXTENSION) *extensions)
 171         {
 172         OCSP_REQUEST *req = NULL;
 173
 174         if ((req = OCSP_REQUEST_new()) == NULL) goto err;
 175         if (name) /* optional */
 176                 {
 177                 if (!(req->tbsRequest->requestorName=GENERAL_NAME_new()))
 178                         goto err;
 179                 req->tbsRequest->requestorName->type = GEN_DIRNAME;
 180                 req->tbsRequest->requestorName->d.dirn = X509_NAME_dup(name);
 181                 }
 182         if (!(req->tbsRequest->requestList = sk_OCSP_ONEREQ_new(NULL))) goto err;
 183         if (extensions &&
 184             (!(req->tbsRequest->requestExtensions = ext_dup(extensions))))
 185                 goto err;
 186         return req;
 187 err:
 188         if (req) OCSP_REQUEST_free(req);
 189         return NULL;
 190         }
 191
 192 int OCSP_request_add(OCSP_REQUEST             *req,
 193                      OCSP_CERTID              *cid,
 194                      STACK_OF(X509_EXTENSION) *extensions)
 195         {
 196         OCSP_ONEREQ *one = NULL;
 197
 198         if (!(one = OCSP_ONEREQ_new())) goto err;
 199         if (one->reqCert) OCSP_CERTID_free(one->reqCert);
 200         if (!(one->reqCert = OCSP_CERTID_dup(cid))) goto err;
 201         if (extensions&&(!(one->singleRequestExtensions=ext_dup(extensions))))
 202                 goto err;
 203         if (!sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one)) goto err;
 204         return 1;
 205 err:
 206         if (one) OCSP_ONEREQ_free(one);
 207         return 0;
 208         }
 209
 210 int OCSP_request_sign(OCSP_REQUEST   *req,
 211                       EVP_PKEY       *key,
 212                       const EVP_MD   *dgst,
 213                       STACK_OF(X509) *certs)
 214         {
 215         int i;
 216         OCSP_SIGNATURE *sig;
 217
 218         if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new())) goto err;
 219         if (!OCSP_REQUEST_sign(req, key, dgst)) goto err;
 220         if (certs)
 221                 {
 222                 if (!(sig->certs = sk_X509_dup(certs))) goto err;
 223                 for (i = 0; i < sk_X509_num(sig->certs); i++)
 224                         {
 225                         sk_X509_set(sig->certs, i,
 226                                X509_dup(sk_X509_value(certs,i)));
 227                         if (! sk_X509_value(sig->certs, i))
 228                               goto err;
 229                         }
 230                 }
 231         return 1;
 232 err:
 233         if (req->optionalSignature)
 234                 {
 235                 OCSP_SIGNATURE_free(req->optionalSignature);
 236                 req->optionalSignature = NULL;
 237                 }
 238         return 0;
 239         }
 240
 241 OCSP_BASICRESP *OCSP_basic_response_new(int type,
 242                                         X509* cert,
 243                                         STACK_OF(X509_EXTENSION) *extensions)
 244         {
 245         time_t t;
 246         OCSP_RESPID *rid;
 247         ASN1_BIT_STRING *bs;
 248         OCSP_BASICRESP *rsp = NULL;
 249         unsigned char md[SHA_DIGEST_LENGTH];
 250
 251         if (!(rsp = OCSP_BASICRESP_new())) goto err;
 252         rid = rsp->tbsResponseData->responderId;
 253         switch (rid->type = type)
 254                 {
 255                 case V_OCSP_RESPID_NAME:
 256                         /* cert is user cert */
 257                         if (!(rid->value.byName =
 258                                   X509_NAME_dup(X509_get_subject_name(cert))))
 259                                 goto err;
 260                         break;
 261                 case V_OCSP_RESPID_KEY:
 262                         /* cert is issuer cert */
 263                         /* SHA-1 hash of responder's public key
 264                          * (excluding the tag and length fields)
 265                          */
 266                         bs = cert->cert_info->key->public_key;
 267                         SHA1(ASN1_STRING_data((ASN1_STRING*)bs),
 268                              ASN1_STRING_length((ASN1_STRING*)bs), md);
 269                         if (!(rid->value.byKey = ASN1_OCTET_STRING_new()))
 270                                 goto err;
 271                         if (!(ASN1_OCTET_STRING_set(rid->value.byKey,
 272                                                     md, sizeof md)))
 273                                 goto err;
 274                         break;
 275                 default:
 276                         OCSPerr(OCSP_F_BASIC_RESPONSE_NEW,OCSP_R_BAD_TAG);
 277                         goto err;
 278                         break;
 279                 }
 280         time(&t);
 281         if (!(ASN1_GENERALIZEDTIME_set(rsp->tbsResponseData->producedAt, t)))
 282                 goto err;
 283         if (!(rsp->tbsResponseData->responses = sk_OCSP_SINGLERESP_new(NULL))) goto err;
 284         if (extensions && (!(rsp->tbsResponseData->responseExtensions =
 285                                               ext_dup(extensions))))
 286                 goto err;
 287         return rsp;
 288 err:
 289         if (rsp) OCSP_BASICRESP_free(rsp);
 290         return NULL;
 291         }
 292
 293 int OCSP_basic_response_add(OCSP_BASICRESP           *rsp,
 294                             OCSP_CERTID              *cid,
 295                             OCSP_CERTSTATUS          *cst,
 296                             char                     *this,
 297                             char                     *next,
 298                             STACK_OF(X509_EXTENSION) *extensions)
 299         {
 300         OCSP_SINGLERESP *single = NULL;
 301
 302         if (!(single = OCSP_SINGLERESP_new())) goto err;
 303         if (single->certId) OCSP_CERTID_free(single->certId);
 304         if (!(single->certId = OCSP_CERTID_dup(cid))) goto err;
 305         if (single->certStatus) OCSP_CERTSTATUS_free(single->certStatus);
 306         if (!(single->certStatus = OCSP_CERTSTATUS_dup(cst))) goto err;
 307         if (!ASN1_GENERALIZEDTIME_set_string(single->thisUpdate,this))goto err;
 308         if (next)
 309                 {
 310                 if (!(single->nextUpdate = ASN1_GENERALIZEDTIME_new()))
 311                         goto err;
 312                 if (!ASN1_GENERALIZEDTIME_set_string(single->nextUpdate,next))
 313                         goto err;
 314                 }
 315         if (extensions && (!(single->singleExtensions = ext_dup(extensions))))
 316                 goto err;
 317         if (!sk_OCSP_SINGLERESP_push(rsp->tbsResponseData->responses,single)) goto err;
 318         return 1;
 319 err:
 320         if (single) OCSP_SINGLERESP_free(single);
 321         return 0;
 322         }
 323
 324 int OCSP_basic_response_sign(OCSP_BASICRESP *brsp,
 325                              EVP_PKEY       *key,
 326                              const EVP_MD   *dgst,
 327                              STACK_OF(X509) *certs)
 328         {
 329         int i;
 330
 331         /* Right now, I think that not doing double hashing is the right
 332            thing.       -- Richard Levitte */
 333         if (!OCSP_BASICRESP_sign(brsp, key, dgst, 0)) goto err;
 334         if (certs)
 335                 {
 336                 if (!(brsp->certs = sk_X509_dup(certs))) goto err;
 337                 for (i = 0; i < sk_X509_num(brsp->certs); i++)
 338                         {
 339                         sk_X509_set(brsp->certs, i,
 340                                X509_dup(sk_X509_value(certs, i)));
 341                         if (! sk_X509_value(brsp->certs, i))
 342                                 goto err;
 343                         }
 344                 }
 345         return 1;
 346 err:
 347         return 0;
 348         }
 349
 350 OCSP_RESPONSE *OCSP_response_new(int status,
 351                                  int nid,
 352                                  int (*i2d)(),
 353                                  char *data)
 354         {
 355         OCSP_RESPONSE *rsp = NULL;
 356
 357         if (!(rsp = OCSP_RESPONSE_new())) goto err;
 358         if (!(ASN1_ENUMERATED_set(rsp->responseStatus, status))) goto err;
 359         if (!(rsp->responseBytes = OCSP_RESPBYTES_new())) goto err;
 360         if (rsp->responseBytes->responseType) ASN1_OBJECT_free(rsp->responseBytes->responseType);
 361         if (!(rsp->responseBytes->responseType = OBJ_nid2obj(nid))) goto err;
 362         if (!ASN1_STRING_encode((ASN1_STRING*)rsp->responseBytes->response,
 363                                 i2d, data, NULL)) goto err;
 364         return rsp;
 365 err:
 366         if (rsp) OCSP_RESPONSE_free(rsp);
 367         return NULL;
 368         }
 369
 370 /* XXX assumes certs in signature are sorted root to leaf XXX */
 371 int OCSP_request_verify(OCSP_REQUEST *req, EVP_PKEY *pkey)
 372         {
 373         STACK_OF(X509) *sk;
 374
 375         if (!req->optionalSignature) return 0;
 376         if (pkey == NULL)
 377                 {
 378                 if (!(sk = req->optionalSignature->certs)) return 0;
 379                 if (!(pkey=X509_get_pubkey(sk_X509_value(sk, sk_X509_num(sk)-1))))
 380                         {
 381                         OCSPerr(OCSP_F_REQUEST_VERIFY,OCSP_R_NO_PUBLIC_KEY);
 382                         return 0;
 383                         }
 384                 }
 385         return OCSP_REQUEST_verify(req, pkey);
 386         }
 387
 388 int OCSP_response_verify(OCSP_RESPONSE *rsp, EVP_PKEY *pkey)
 389         {
 390         int i, r;
 391         unsigned char *p;
 392         OCSP_RESPBYTES *rb;
 393         OCSP_BASICRESP *br = NULL;
 394
 395         if ((rb = rsp->responseBytes) == NULL)
 396                 {
 397                 OCSPerr(OCSP_F_RESPONSE_VERIFY,OCSP_R_NO_RESPONSE_DATA);
 398                 return 0;
 399                 }
 400         if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic)
 401                 {
 402                 OCSPerr(OCSP_F_RESPONSE_VERIFY,OCSP_R_BAD_TAG);
 403                 return 0;
 404                 }
 405         p = ASN1_STRING_data(rb->response);
 406         i = ASN1_STRING_length(rb->response);
 407         if (!(d2i_OCSP_BASICRESP(&br, &p, i))) return 0;
 408         r = OCSP_basic_response_verify(br, pkey);
 409         OCSP_BASICRESP_free(br);
 410         return r;
 411         }
 412
 413 int OCSP_basic_response_verify(OCSP_BASICRESP *rsp, EVP_PKEY *pkey)
 414         {
 415         STACK_OF(X509) *sk;
 416         int ret;
 417
 418         if (!rsp->signature)
 419                 {
 420                 OCSPerr(OCSP_F_BASIC_RESPONSE_VERIFY,OCSP_R_NO_SIGNATURE);
 421                 return 0;
 422                 }
 423         if (pkey == NULL)
 424                 {
 425                 if (!(sk = rsp->certs))
 426                         {
 427                         OCSPerr(OCSP_F_BASIC_RESPONSE_VERIFY,OCSP_R_NO_CERTIFICATE);
 428                         return 0;
 429                         }
 430                 if (!(pkey=X509_get_pubkey(sk_X509_value(sk, sk_X509_num(sk)-1))))
 431                         {
 432                         OCSPerr(OCSP_F_BASIC_RESPONSE_VERIFY,OCSP_R_NO_PUBLIC_KEY);
 433                         return 0;
 434                         }
 435                 }
 436         ret = OCSP_BASICRESP_verify(rsp, pkey, 0);
 437         return ret;
 438         }