crypto/cms/cms_ess.c

   1 /* crypto/cms/cms_ess.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   4  * project.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2008 The OpenSSL Project.  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
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  */
  54
  55 #include "cryptlib.h"
  56 #include <openssl/asn1t.h>
  57 #include <openssl/pem.h>
  58 #include <openssl/rand.h>
  59 #include <openssl/x509v3.h>
  60 #include <openssl/err.h>
  61 #include <openssl/cms.h>
  62 #include "cms_lcl.h"
  63
  64 DECLARE_ASN1_ITEM(CMS_ReceiptRequest)
  65 DECLARE_ASN1_ITEM(CMS_Receipt)
  66
  67 IMPLEMENT_ASN1_FUNCTIONS(CMS_ReceiptRequest)
  68
  69 /* ESS services: for now just Signed Receipt related */
  70
  71 int CMS_get1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest **prr)
  72 {
  73     ASN1_STRING *str;
  74     CMS_ReceiptRequest *rr = NULL;
  75     if (prr)
  76         *prr = NULL;
  77     str = CMS_signed_get0_data_by_OBJ(si,
  78                                       OBJ_nid2obj
  79                                       (NID_id_smime_aa_receiptRequest), -3,
  80                                       V_ASN1_SEQUENCE);
  81     if (!str)
  82         return 0;
  83
  84     rr = ASN1_item_unpack(str, ASN1_ITEM_rptr(CMS_ReceiptRequest));
  85     if (!rr)
  86         return -1;
  87     if (prr)
  88         *prr = rr;
  89     else
  90         CMS_ReceiptRequest_free(rr);
  91     return 1;
  92 }
  93
  94 CMS_ReceiptRequest *CMS_ReceiptRequest_create0(unsigned char *id, int idlen,
  95                                                int allorfirst,
  96                                                STACK_OF(GENERAL_NAMES)
  97                                                *receiptList, STACK_OF(GENERAL_NAMES)
  98                                                *receiptsTo)
  99 {
 100     CMS_ReceiptRequest *rr = NULL;
 101
 102     rr = CMS_ReceiptRequest_new();
 103     if (!rr)
 104         goto merr;
 105     if (id)
 106         ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
 107     else {
 108         if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32))
 109             goto merr;
 110         if (RAND_bytes(rr->signedContentIdentifier->data, 32) <= 0)
 111             goto err;
 112     }
 113
 114     sk_GENERAL_NAMES_pop_free(rr->receiptsTo, GENERAL_NAMES_free);
 115     rr->receiptsTo = receiptsTo;
 116
 117     if (receiptList) {
 118         rr->receiptsFrom->type = 1;
 119         rr->receiptsFrom->d.receiptList = receiptList;
 120     } else {
 121         rr->receiptsFrom->type = 0;
 122         rr->receiptsFrom->d.allOrFirstTier = allorfirst;
 123     }
 124
 125     return rr;
 126
 127  merr:
 128     CMSerr(CMS_F_CMS_RECEIPTREQUEST_CREATE0, ERR_R_MALLOC_FAILURE);
 129
 130  err:
 131     CMS_ReceiptRequest_free(rr);
 132     return NULL;
 133
 134 }
 135
 136 int CMS_add1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest *rr)
 137 {
 138     unsigned char *rrder = NULL;
 139     int rrderlen, r = 0;
 140
 141     rrderlen = i2d_CMS_ReceiptRequest(rr, &rrder);
 142     if (rrderlen < 0)
 143         goto merr;
 144
 145     if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
 146                                      V_ASN1_SEQUENCE, rrder, rrderlen))
 147         goto merr;
 148
 149     r = 1;
 150
 151  merr:
 152     if (!r)
 153         CMSerr(CMS_F_CMS_ADD1_RECEIPTREQUEST, ERR_R_MALLOC_FAILURE);
 154
 155     OPENSSL_free(rrder);
 156
 157     return r;
 158
 159 }
 160
 161 void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr,
 162                                     ASN1_STRING **pcid,
 163                                     int *pallorfirst,
 164                                     STACK_OF(GENERAL_NAMES) **plist,
 165                                     STACK_OF(GENERAL_NAMES) **prto)
 166 {
 167     if (pcid)
 168         *pcid = rr->signedContentIdentifier;
 169     if (rr->receiptsFrom->type == 0) {
 170         if (pallorfirst)
 171             *pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
 172         if (plist)
 173             *plist = NULL;
 174     } else {
 175         if (pallorfirst)
 176             *pallorfirst = -1;
 177         if (plist)
 178             *plist = rr->receiptsFrom->d.receiptList;
 179     }
 180     if (prto)
 181         *prto = rr->receiptsTo;
 182 }
 183
 184 /* Digest a SignerInfo structure for msgSigDigest attribute processing */
 185
 186 static int cms_msgSigDigest(CMS_SignerInfo *si,
 187                             unsigned char *dig, unsigned int *diglen)
 188 {
 189     const EVP_MD *md;
 190     md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
 191     if (md == NULL)
 192         return 0;
 193     if (!ASN1_item_digest(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
 194                           si->signedAttrs, dig, diglen))
 195         return 0;
 196     return 1;
 197 }
 198
 199 /* Add a msgSigDigest attribute to a SignerInfo */
 200
 201 int cms_msgSigDigest_add1(CMS_SignerInfo *dest, CMS_SignerInfo *src)
 202 {
 203     unsigned char dig[EVP_MAX_MD_SIZE];
 204     unsigned int diglen;
 205     if (!cms_msgSigDigest(src, dig, &diglen)) {
 206         CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, CMS_R_MSGSIGDIGEST_ERROR);
 207         return 0;
 208     }
 209     if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
 210                                      V_ASN1_OCTET_STRING, dig, diglen)) {
 211         CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, ERR_R_MALLOC_FAILURE);
 212         return 0;
 213     }
 214     return 1;
 215 }
 216
 217 /* Verify signed receipt after it has already passed normal CMS verify */
 218
 219 int cms_Receipt_verify(CMS_ContentInfo *cms, CMS_ContentInfo *req_cms)
 220 {
 221     int r = 0, i;
 222     CMS_ReceiptRequest *rr = NULL;
 223     CMS_Receipt *rct = NULL;
 224     STACK_OF(CMS_SignerInfo) *sis, *osis;
 225     CMS_SignerInfo *si, *osi = NULL;
 226     ASN1_OCTET_STRING *msig, **pcont;
 227     ASN1_OBJECT *octype;
 228     unsigned char dig[EVP_MAX_MD_SIZE];
 229     unsigned int diglen;
 230
 231     /* Get SignerInfos, also checks SignedData content type */
 232     osis = CMS_get0_SignerInfos(req_cms);
 233     sis = CMS_get0_SignerInfos(cms);
 234     if (!osis || !sis)
 235         goto err;
 236
 237     if (sk_CMS_SignerInfo_num(sis) != 1) {
 238         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NEED_ONE_SIGNER);
 239         goto err;
 240     }
 241
 242     /* Check receipt content type */
 243     if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != NID_id_smime_ct_receipt) {
 244         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NOT_A_SIGNED_RECEIPT);
 245         goto err;
 246     }
 247
 248     /* Extract and decode receipt content */
 249     pcont = CMS_get0_content(cms);
 250     if (!pcont || !*pcont) {
 251         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT);
 252         goto err;
 253     }
 254
 255     rct = ASN1_item_unpack(*pcont, ASN1_ITEM_rptr(CMS_Receipt));
 256
 257     if (!rct) {
 258         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_RECEIPT_DECODE_ERROR);
 259         goto err;
 260     }
 261
 262     /* Locate original request */
 263
 264     for (i = 0; i < sk_CMS_SignerInfo_num(osis); i++) {
 265         osi = sk_CMS_SignerInfo_value(osis, i);
 266         if (!ASN1_STRING_cmp(osi->signature, rct->originatorSignatureValue))
 267             break;
 268     }
 269
 270     if (i == sk_CMS_SignerInfo_num(osis)) {
 271         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MATCHING_SIGNATURE);
 272         goto err;
 273     }
 274
 275     si = sk_CMS_SignerInfo_value(sis, 0);
 276
 277     /* Get msgSigDigest value and compare */
 278
 279     msig = CMS_signed_get0_data_by_OBJ(si,
 280                                        OBJ_nid2obj
 281                                        (NID_id_smime_aa_msgSigDigest), -3,
 282                                        V_ASN1_OCTET_STRING);
 283
 284     if (!msig) {
 285         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MSGSIGDIGEST);
 286         goto err;
 287     }
 288
 289     if (!cms_msgSigDigest(osi, dig, &diglen)) {
 290         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_ERROR);
 291         goto err;
 292     }
 293
 294     if (diglen != (unsigned int)msig->length) {
 295         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_WRONG_LENGTH);
 296         goto err;
 297     }
 298
 299     if (memcmp(dig, msig->data, diglen)) {
 300         CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
 301                CMS_R_MSGSIGDIGEST_VERIFICATION_FAILURE);
 302         goto err;
 303     }
 304
 305     /* Compare content types */
 306
 307     octype = CMS_signed_get0_data_by_OBJ(osi,
 308                                          OBJ_nid2obj(NID_pkcs9_contentType),
 309                                          -3, V_ASN1_OBJECT);
 310     if (!octype) {
 311         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT_TYPE);
 312         goto err;
 313     }
 314
 315     /* Compare details in receipt request */
 316
 317     if (OBJ_cmp(octype, rct->contentType)) {
 318         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENT_TYPE_MISMATCH);
 319         goto err;
 320     }
 321
 322     /* Get original receipt request details */
 323
 324     if (CMS_get1_ReceiptRequest(osi, &rr) <= 0) {
 325         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_RECEIPT_REQUEST);
 326         goto err;
 327     }
 328
 329     if (ASN1_STRING_cmp(rr->signedContentIdentifier,
 330                         rct->signedContentIdentifier)) {
 331         CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENTIDENTIFIER_MISMATCH);
 332         goto err;
 333     }
 334
 335     r = 1;
 336
 337  err:
 338     CMS_ReceiptRequest_free(rr);
 339     M_ASN1_free_of(rct, CMS_Receipt);
 340     return r;
 341
 342 }
 343
 344 /*
 345  * Encode a Receipt into an OCTET STRING read for including into content of a
 346  * SignedData ContentInfo.
 347  */
 348
 349 ASN1_OCTET_STRING *cms_encode_Receipt(CMS_SignerInfo *si)
 350 {
 351     CMS_Receipt rct;
 352     CMS_ReceiptRequest *rr = NULL;
 353     ASN1_OBJECT *ctype;
 354     ASN1_OCTET_STRING *os = NULL;
 355
 356     /* Get original receipt request */
 357
 358     /* Get original receipt request details */
 359
 360     if (CMS_get1_ReceiptRequest(si, &rr) <= 0) {
 361         CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_RECEIPT_REQUEST);
 362         goto err;
 363     }
 364
 365     /* Get original content type */
 366
 367     ctype = CMS_signed_get0_data_by_OBJ(si,
 368                                         OBJ_nid2obj(NID_pkcs9_contentType),
 369                                         -3, V_ASN1_OBJECT);
 370     if (!ctype) {
 371         CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_CONTENT_TYPE);
 372         goto err;
 373     }
 374
 375     rct.version = 1;
 376     rct.contentType = ctype;
 377     rct.signedContentIdentifier = rr->signedContentIdentifier;
 378     rct.originatorSignatureValue = si->signature;
 379
 380     os = ASN1_item_pack(&rct, ASN1_ITEM_rptr(CMS_Receipt), NULL);
 381
 382  err:
 383     CMS_ReceiptRequest_free(rr);
 384     return os;
 385 }