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/ocsp.h>
  71
  72 /* Convert a certificate and its issuer to an OCSP_CERTID */
  73
  74 OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer)
  75 {
  76         X509_NAME *iname;
  77         ASN1_INTEGER *serial;
  78         ASN1_BIT_STRING *ikey;
  79 #ifndef NO_SHA1
  80         if(!dgst) dgst = EVP_sha1();
  81 #endif
  82         iname = X509_get_issuer_name(subject);
  83         serial = X509_get_serialNumber(subject);
  84         ikey = issuer->cert_info->key->public_key;
  85         return OCSP_cert_id_new(dgst, iname, ikey, serial);
  86 }
  87
  88
  89 OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst,
  90                               X509_NAME *issuerName,
  91                               ASN1_BIT_STRING* issuerKey,
  92                               ASN1_INTEGER *serialNumber)
  93         {
  94         int nid;
  95         unsigned int i;
  96         X509_ALGOR *alg;
  97         OCSP_CERTID *cid = NULL;
  98         unsigned char md[EVP_MAX_MD_SIZE];
  99         EVP_MD_CTX ctx;
 100
 101         if (!(cid = OCSP_CERTID_new())) goto err;
 102
 103         alg = cid->hashAlgorithm;
 104         if (alg->algorithm != NULL) ASN1_OBJECT_free(alg->algorithm);
 105         if ((nid = EVP_MD_type(dgst)) == NID_undef)
 106                 {
 107                 OCSPerr(OCSP_F_CERT_ID_NEW,OCSP_R_UNKNOWN_NID);
 108                 goto err;
 109                 }
 110         if (!(alg->algorithm=OBJ_nid2obj(nid))) goto err;
 111         if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err;
 112         alg->parameter->type=V_ASN1_NULL;
 113
 114         if (!X509_NAME_digest(issuerName, dgst, md, &i)) goto digerr;
 115         if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i))) goto err;
 116
 117         /* Calculate the issuerKey hash, excluding tag and length */
 118         EVP_DigestInit(&ctx,dgst);
 119         EVP_DigestUpdate(&ctx,issuerKey->data, issuerKey->length);
 120         EVP_DigestFinal(&ctx,md,&i);
 121
 122         if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i))) goto err;
 123
 124         if (cid->serialNumber != NULL) ASN1_INTEGER_free(cid->serialNumber);
 125         if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber))) goto err;
 126         return cid;
 127 digerr:
 128         OCSPerr(OCSP_F_CERT_ID_NEW,OCSP_R_DIGEST_ERR);
 129 err:
 130         if (cid) OCSP_CERTID_free(cid);
 131         return NULL;
 132         }
 133
 134 OCSP_CERTSTATUS *OCSP_cert_status_new(int status, int reason, char *tim)
 135         {
 136         OCSP_REVOKEDINFO *ri;
 137         OCSP_CERTSTATUS *cs = NULL;
 138
 139         if (!(cs = OCSP_CERTSTATUS_new())) goto err;
 140         if ((cs->type = status) == V_OCSP_CERTSTATUS_REVOKED)
 141                 {
 142                 if (!time)
 143                         {
 144                         OCSPerr(OCSP_F_CERT_STATUS_NEW,OCSP_R_REVOKED_NO_TIME);
 145                         goto err;
 146                         }
 147                 if (!(cs->value.revoked = ri = OCSP_REVOKEDINFO_new())) goto err;
 148                 if (!ASN1_GENERALIZEDTIME_set_string(ri->revocationTime,tim))
 149                         goto err;
 150                 if (reason != OCSP_REVOKED_STATUS_NOSTATUS)
 151                         {
 152                         if (!(ri->revocationReason = ASN1_ENUMERATED_new()))
 153                                 goto err;
 154                         if (!(ASN1_ENUMERATED_set(ri->revocationReason,
 155                                                   reason)))
 156                                 goto err;
 157                         }
 158                 }
 159         return cs;
 160 err:
 161         if (cs) OCSP_CERTSTATUS_free(cs);
 162         return NULL;
 163         }
 164
 165 OCSP_ONEREQ *OCSP_request_add0(OCSP_REQUEST *req, OCSP_CERTID *cid)
 166         {
 167         OCSP_ONEREQ *one = NULL;
 168
 169         if (!(one = OCSP_ONEREQ_new())) goto err;
 170         if (one->reqCert) OCSP_CERTID_free(one->reqCert);
 171         one->reqCert = cid;
 172         if (req &&
 173                 !sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one))
 174                                 goto err;
 175         return one;
 176 err:
 177         if (one) OCSP_ONEREQ_free(one);
 178         return NULL;
 179         }
 180
 181 int OCSP_request_sign(OCSP_REQUEST   *req,
 182                       EVP_PKEY       *key,
 183                       const EVP_MD   *dgst,
 184                       STACK_OF(X509) *certs)
 185         {
 186         int i;
 187         OCSP_SIGNATURE *sig;
 188
 189         if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new())) goto err;
 190         if (!OCSP_REQUEST_sign(req, key, dgst)) goto err;
 191         if (certs)
 192                 {
 193                 if (!(sig->certs = sk_X509_dup(certs))) goto err;
 194                 for (i = 0; i < sk_X509_num(sig->certs); i++)
 195                         {
 196                         sk_X509_set(sig->certs, i,
 197                                X509_dup(sk_X509_value(certs,i)));
 198                         if (! sk_X509_value(sig->certs, i))
 199                               goto err;
 200                         }
 201                 }
 202         return 1;
 203 err:
 204         if (req->optionalSignature)
 205                 {
 206                 OCSP_SIGNATURE_free(req->optionalSignature);
 207                 req->optionalSignature = NULL;
 208                 }
 209         return 0;
 210         }
 211
 212 OCSP_BASICRESP *OCSP_basic_response_new(int type, X509* cert)
 213         {
 214         time_t t;
 215         OCSP_RESPID *rid;
 216         ASN1_BIT_STRING *bs;
 217         OCSP_BASICRESP *rsp = NULL;
 218         unsigned char md[SHA_DIGEST_LENGTH];
 219
 220         if (!(rsp = OCSP_BASICRESP_new())) goto err;
 221         rid = rsp->tbsResponseData->responderId;
 222         switch (rid->type = type)
 223                 {
 224                 case V_OCSP_RESPID_NAME:
 225                         /* cert is user cert */
 226                         if (!(rid->value.byName =
 227                                   X509_NAME_dup(X509_get_subject_name(cert))))
 228                                 goto err;
 229                         break;
 230                 case V_OCSP_RESPID_KEY:
 231                         /* cert is issuer cert */
 232                         /* SHA-1 hash of responder's public key
 233                          * (excluding the tag and length fields)
 234                          */
 235                         bs = cert->cert_info->key->public_key;
 236                         SHA1(ASN1_STRING_data((ASN1_STRING*)bs),
 237                              ASN1_STRING_length((ASN1_STRING*)bs), md);
 238                         if (!(rid->value.byKey = ASN1_OCTET_STRING_new()))
 239                                 goto err;
 240                         if (!(ASN1_OCTET_STRING_set(rid->value.byKey,
 241                                                     md, sizeof md)))
 242                                 goto err;
 243                         break;
 244                 default:
 245                         OCSPerr(OCSP_F_BASIC_RESPONSE_NEW,OCSP_R_BAD_TAG);
 246                         goto err;
 247                         break;
 248                 }
 249         time(&t);
 250         if (!(ASN1_GENERALIZEDTIME_set(rsp->tbsResponseData->producedAt, t)))
 251                 goto err;
 252         if (!(rsp->tbsResponseData->responses = sk_OCSP_SINGLERESP_new(NULL))) goto err;
 253         return rsp;
 254 err:
 255         if (rsp) OCSP_BASICRESP_free(rsp);
 256         return NULL;
 257         }
 258
 259 int OCSP_basic_response_add(OCSP_BASICRESP           *rsp,
 260                             OCSP_CERTID              *cid,
 261                             OCSP_CERTSTATUS          *cst,
 262                             char                     *this,
 263                             char                     *next)
 264         {
 265         OCSP_SINGLERESP *single = NULL;
 266
 267         if (!(single = OCSP_SINGLERESP_new())) goto err;
 268         if (single->certId) OCSP_CERTID_free(single->certId);
 269         if (!(single->certId = OCSP_CERTID_dup(cid))) goto err;
 270         if (single->certStatus) OCSP_CERTSTATUS_free(single->certStatus);
 271         if (!(single->certStatus = OCSP_CERTSTATUS_dup(cst))) goto err;
 272         if (!ASN1_GENERALIZEDTIME_set_string(single->thisUpdate,this))goto err;
 273         if (next)
 274                 {
 275                 if (!(single->nextUpdate = ASN1_GENERALIZEDTIME_new()))
 276                         goto err;
 277                 if (!ASN1_GENERALIZEDTIME_set_string(single->nextUpdate,next))
 278                         goto err;
 279                 }
 280         if (!sk_OCSP_SINGLERESP_push(rsp->tbsResponseData->responses,single)) goto err;
 281         return 1;
 282 err:
 283         if (single) OCSP_SINGLERESP_free(single);
 284         return 0;
 285         }
 286
 287 int OCSP_basic_response_sign(OCSP_BASICRESP *brsp,
 288                              EVP_PKEY       *key,
 289                              const EVP_MD   *dgst,
 290                              STACK_OF(X509) *certs)
 291         {
 292         int i;
 293
 294         /* Right now, I think that not doing double hashing is the right
 295            thing.       -- Richard Levitte */
 296         if (!OCSP_BASICRESP_sign(brsp, key, dgst, 0)) goto err;
 297         if (certs)
 298                 {
 299                 if (!(brsp->certs = sk_X509_dup(certs))) goto err;
 300                 for (i = 0; i < sk_X509_num(brsp->certs); i++)
 301                         {
 302                         sk_X509_set(brsp->certs, i,
 303                                X509_dup(sk_X509_value(certs, i)));
 304                         if (! sk_X509_value(brsp->certs, i))
 305                                 goto err;
 306                         }
 307                 }
 308         return 1;
 309 err:
 310         return 0;
 311         }
 312
 313 OCSP_RESPONSE *OCSP_response_new(int status,
 314                                  int nid,
 315                                  int (*i2d)(),
 316                                  char *data)
 317         {
 318         OCSP_RESPONSE *rsp = NULL;
 319
 320         if (!(rsp = OCSP_RESPONSE_new())) goto err;
 321         if (!(ASN1_ENUMERATED_set(rsp->responseStatus, status))) goto err;
 322         if (!(rsp->responseBytes = OCSP_RESPBYTES_new())) goto err;
 323         if (rsp->responseBytes->responseType) ASN1_OBJECT_free(rsp->responseBytes->responseType);
 324         if (!(rsp->responseBytes->responseType = OBJ_nid2obj(nid))) goto err;
 325         if (!ASN1_STRING_encode((ASN1_STRING*)rsp->responseBytes->response,
 326                                 i2d, data, NULL)) goto err;
 327         return rsp;
 328 err:
 329         if (rsp) OCSP_RESPONSE_free(rsp);
 330         return NULL;
 331         }
 332
 333 /* XXX assumes certs in signature are sorted root to leaf XXX */
 334 int OCSP_request_verify(OCSP_REQUEST *req, EVP_PKEY *pkey)
 335         {
 336         STACK_OF(X509) *sk;
 337
 338         if (!req->optionalSignature) return 0;
 339         if (pkey == NULL)
 340                 {
 341                 if (!(sk = req->optionalSignature->certs)) return 0;
 342                 if (!(pkey=X509_get_pubkey(sk_X509_value(sk, sk_X509_num(sk)-1))))
 343                         {
 344                         OCSPerr(OCSP_F_REQUEST_VERIFY,OCSP_R_NO_PUBLIC_KEY);
 345                         return 0;
 346                         }
 347                 }
 348         return OCSP_REQUEST_verify(req, pkey);
 349         }
 350
 351 int OCSP_response_verify(OCSP_RESPONSE *rsp, EVP_PKEY *pkey)
 352         {
 353         int i, r;
 354         unsigned char *p;
 355         OCSP_RESPBYTES *rb;
 356         OCSP_BASICRESP *br = NULL;
 357
 358         if ((rb = rsp->responseBytes) == NULL)
 359                 {
 360                 OCSPerr(OCSP_F_RESPONSE_VERIFY,OCSP_R_NO_RESPONSE_DATA);
 361                 return 0;
 362                 }
 363         if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic)
 364                 {
 365                 OCSPerr(OCSP_F_RESPONSE_VERIFY,OCSP_R_BAD_TAG);
 366                 return 0;
 367                 }
 368         p = ASN1_STRING_data(rb->response);
 369         i = ASN1_STRING_length(rb->response);
 370         if (!(d2i_OCSP_BASICRESP(&br, &p, i))) return 0;
 371         r = OCSP_basic_response_verify(br, pkey);
 372         OCSP_BASICRESP_free(br);
 373         return r;
 374         }
 375
 376 int OCSP_basic_response_verify(OCSP_BASICRESP *rsp, EVP_PKEY *pkey)
 377         {
 378         STACK_OF(X509) *sk;
 379         int ret;
 380
 381         if (!rsp->signature)
 382                 {
 383                 OCSPerr(OCSP_F_BASIC_RESPONSE_VERIFY,OCSP_R_NO_SIGNATURE);
 384                 return 0;
 385                 }
 386         if (pkey == NULL)
 387                 {
 388                 if (!(sk = rsp->certs))
 389                         {
 390                         OCSPerr(OCSP_F_BASIC_RESPONSE_VERIFY,OCSP_R_NO_CERTIFICATE);
 391                         return 0;
 392                         }
 393                 if (!(pkey=X509_get_pubkey(sk_X509_value(sk, sk_X509_num(sk)-1))))
 394                         {
 395                         OCSPerr(OCSP_F_BASIC_RESPONSE_VERIFY,OCSP_R_NO_PUBLIC_KEY);
 396                         return 0;
 397                         }
 398                 }
 399         ret = OCSP_BASICRESP_verify(rsp, pkey, 0);
 400         return ret;
 401         }