405 lines
10 KiB
C
405 lines
10 KiB
C
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/* $OpenBSD: cms_ess.c,v 1.21 2019/08/11 14:19:09 jsing Exp $ */
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/*
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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* project.
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*/
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/* ====================================================================
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* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*/
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#include <string.h>
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#include "cryptlib.h"
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#include <openssl/asn1t.h>
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#include <openssl/pem.h>
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#include <openssl/rand.h>
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#include <openssl/x509v3.h>
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#include <openssl/err.h>
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#include <openssl/cms.h>
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#include "cms_lcl.h"
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CMS_ReceiptRequest *
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d2i_CMS_ReceiptRequest(CMS_ReceiptRequest **a, const unsigned char **in, long len)
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{
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return (CMS_ReceiptRequest *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
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&CMS_ReceiptRequest_it);
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}
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int
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i2d_CMS_ReceiptRequest(CMS_ReceiptRequest *a, unsigned char **out)
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{
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return ASN1_item_i2d((ASN1_VALUE *)a, out, &CMS_ReceiptRequest_it);
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}
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CMS_ReceiptRequest *
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CMS_ReceiptRequest_new(void)
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{
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return (CMS_ReceiptRequest *)ASN1_item_new(&CMS_ReceiptRequest_it);
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}
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void
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CMS_ReceiptRequest_free(CMS_ReceiptRequest *a)
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{
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ASN1_item_free((ASN1_VALUE *)a, &CMS_ReceiptRequest_it);
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}
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/* ESS services: for now just Signed Receipt related */
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int
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CMS_get1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest **prr)
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{
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ASN1_STRING *str;
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CMS_ReceiptRequest *rr = NULL;
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if (prr)
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*prr = NULL;
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str = CMS_signed_get0_data_by_OBJ(si,
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OBJ_nid2obj(NID_id_smime_aa_receiptRequest), -3, V_ASN1_SEQUENCE);
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if (!str)
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return 0;
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rr = ASN1_item_unpack(str, &CMS_ReceiptRequest_it);
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if (!rr)
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return -1;
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if (prr)
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*prr = rr;
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else
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CMS_ReceiptRequest_free(rr);
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return 1;
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}
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CMS_ReceiptRequest *
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CMS_ReceiptRequest_create0(unsigned char *id, int idlen, int allorfirst,
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STACK_OF(GENERAL_NAMES) *receiptList, STACK_OF(GENERAL_NAMES) *receiptsTo)
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{
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CMS_ReceiptRequest *rr = NULL;
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rr = CMS_ReceiptRequest_new();
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if (rr == NULL)
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goto merr;
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if (id)
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ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
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else {
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if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32))
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goto merr;
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arc4random_buf(rr->signedContentIdentifier->data, 32);
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}
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sk_GENERAL_NAMES_pop_free(rr->receiptsTo, GENERAL_NAMES_free);
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rr->receiptsTo = receiptsTo;
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if (receiptList) {
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rr->receiptsFrom->type = 1;
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rr->receiptsFrom->d.receiptList = receiptList;
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} else {
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rr->receiptsFrom->type = 0;
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rr->receiptsFrom->d.allOrFirstTier = allorfirst;
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}
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return rr;
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merr:
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CMSerror(ERR_R_MALLOC_FAILURE);
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CMS_ReceiptRequest_free(rr);
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return NULL;
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}
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int
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CMS_add1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest *rr)
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{
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unsigned char *rrder = NULL;
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int rrderlen, r = 0;
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rrderlen = i2d_CMS_ReceiptRequest(rr, &rrder);
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if (rrderlen < 0)
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goto merr;
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if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
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V_ASN1_SEQUENCE, rrder, rrderlen))
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goto merr;
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r = 1;
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merr:
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if (!r)
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CMSerror(ERR_R_MALLOC_FAILURE);
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free(rrder);
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return r;
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}
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void
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CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr, ASN1_STRING **pcid,
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int *pallorfirst, STACK_OF(GENERAL_NAMES) **plist,
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STACK_OF(GENERAL_NAMES) **prto)
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{
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if (pcid)
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*pcid = rr->signedContentIdentifier;
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if (rr->receiptsFrom->type == 0) {
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if (pallorfirst)
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*pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
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if (plist)
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*plist = NULL;
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} else {
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if (pallorfirst)
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*pallorfirst = -1;
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if (plist)
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*plist = rr->receiptsFrom->d.receiptList;
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}
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if (prto)
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*prto = rr->receiptsTo;
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}
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/* Digest a SignerInfo structure for msgSigDigest attribute processing */
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static int
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cms_msgSigDigest(CMS_SignerInfo *si, unsigned char *dig, unsigned int *diglen)
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{
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const EVP_MD *md;
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md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
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if (md == NULL)
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return 0;
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if (!ASN1_item_digest(&CMS_Attributes_Verify_it, md,
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si->signedAttrs, dig, diglen))
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return 0;
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return 1;
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}
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/* Add a msgSigDigest attribute to a SignerInfo */
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int
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cms_msgSigDigest_add1(CMS_SignerInfo *dest, CMS_SignerInfo *src)
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{
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unsigned char dig[EVP_MAX_MD_SIZE];
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unsigned int diglen;
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if (!cms_msgSigDigest(src, dig, &diglen)) {
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CMSerror(CMS_R_MSGSIGDIGEST_ERROR);
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return 0;
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}
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if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
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V_ASN1_OCTET_STRING, dig, diglen)) {
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CMSerror(ERR_R_MALLOC_FAILURE);
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return 0;
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}
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return 1;
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}
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/* Verify signed receipt after it has already passed normal CMS verify */
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int
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cms_Receipt_verify(CMS_ContentInfo *cms, CMS_ContentInfo *req_cms)
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{
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int r = 0, i;
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CMS_ReceiptRequest *rr = NULL;
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CMS_Receipt *rct = NULL;
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STACK_OF(CMS_SignerInfo) *sis, *osis;
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CMS_SignerInfo *si, *osi = NULL;
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ASN1_OCTET_STRING *msig, **pcont;
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ASN1_OBJECT *octype;
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unsigned char dig[EVP_MAX_MD_SIZE];
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unsigned int diglen;
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/* Get SignerInfos, also checks SignedData content type */
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osis = CMS_get0_SignerInfos(req_cms);
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sis = CMS_get0_SignerInfos(cms);
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if (!osis || !sis)
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goto err;
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if (sk_CMS_SignerInfo_num(sis) != 1) {
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CMSerror(CMS_R_NEED_ONE_SIGNER);
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goto err;
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}
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/* Check receipt content type */
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if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != NID_id_smime_ct_receipt) {
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CMSerror(CMS_R_NOT_A_SIGNED_RECEIPT);
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goto err;
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}
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/* Extract and decode receipt content */
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pcont = CMS_get0_content(cms);
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if (!pcont || !*pcont) {
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CMSerror(CMS_R_NO_CONTENT);
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goto err;
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}
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rct = ASN1_item_unpack(*pcont, &CMS_Receipt_it);
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if (!rct) {
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CMSerror(CMS_R_RECEIPT_DECODE_ERROR);
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goto err;
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}
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/* Locate original request */
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for (i = 0; i < sk_CMS_SignerInfo_num(osis); i++) {
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osi = sk_CMS_SignerInfo_value(osis, i);
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if (!ASN1_STRING_cmp(osi->signature, rct->originatorSignatureValue))
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break;
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}
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if (i == sk_CMS_SignerInfo_num(osis)) {
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CMSerror(CMS_R_NO_MATCHING_SIGNATURE);
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goto err;
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}
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si = sk_CMS_SignerInfo_value(sis, 0);
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/* Get msgSigDigest value and compare */
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msig = CMS_signed_get0_data_by_OBJ(si,
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OBJ_nid2obj(NID_id_smime_aa_msgSigDigest), -3, V_ASN1_OCTET_STRING);
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if (!msig) {
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CMSerror(CMS_R_NO_MSGSIGDIGEST);
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goto err;
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}
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if (!cms_msgSigDigest(osi, dig, &diglen)) {
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CMSerror(CMS_R_MSGSIGDIGEST_ERROR);
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goto err;
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}
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if (diglen != (unsigned int)msig->length) {
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CMSerror(CMS_R_MSGSIGDIGEST_WRONG_LENGTH);
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goto err;
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}
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if (memcmp(dig, msig->data, diglen)) {
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CMSerror(CMS_R_MSGSIGDIGEST_VERIFICATION_FAILURE);
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goto err;
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}
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/* Compare content types */
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octype = CMS_signed_get0_data_by_OBJ(osi,
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OBJ_nid2obj(NID_pkcs9_contentType), -3, V_ASN1_OBJECT);
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if (!octype) {
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CMSerror(CMS_R_NO_CONTENT_TYPE);
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goto err;
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}
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/* Compare details in receipt request */
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if (OBJ_cmp(octype, rct->contentType)) {
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CMSerror(CMS_R_CONTENT_TYPE_MISMATCH);
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goto err;
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}
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/* Get original receipt request details */
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if (CMS_get1_ReceiptRequest(osi, &rr) <= 0) {
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CMSerror(CMS_R_NO_RECEIPT_REQUEST);
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goto err;
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}
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if (ASN1_STRING_cmp(rr->signedContentIdentifier,
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rct->signedContentIdentifier)) {
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CMSerror(CMS_R_CONTENTIDENTIFIER_MISMATCH);
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goto err;
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}
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r = 1;
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err:
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CMS_ReceiptRequest_free(rr);
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ASN1_item_free((ASN1_VALUE *)rct, &CMS_Receipt_it);
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return r;
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}
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/*
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* Encode a Receipt into an OCTET STRING read for including into content of a
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* SignedData ContentInfo.
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*/
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ASN1_OCTET_STRING *
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cms_encode_Receipt(CMS_SignerInfo *si)
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{
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CMS_Receipt rct;
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CMS_ReceiptRequest *rr = NULL;
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ASN1_OBJECT *ctype;
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ASN1_OCTET_STRING *os = NULL;
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/* Get original receipt request */
|
||
|
|
|
||
|
|
/* Get original receipt request details */
|
||
|
|
|
||
|
|
if (CMS_get1_ReceiptRequest(si, &rr) <= 0) {
|
||
|
|
CMSerror(CMS_R_NO_RECEIPT_REQUEST);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get original content type */
|
||
|
|
|
||
|
|
ctype = CMS_signed_get0_data_by_OBJ(si,
|
||
|
|
OBJ_nid2obj(NID_pkcs9_contentType), -3, V_ASN1_OBJECT);
|
||
|
|
if (!ctype) {
|
||
|
|
CMSerror(CMS_R_NO_CONTENT_TYPE);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
rct.version = 1;
|
||
|
|
rct.contentType = ctype;
|
||
|
|
rct.signedContentIdentifier = rr->signedContentIdentifier;
|
||
|
|
rct.originatorSignatureValue = si->signature;
|
||
|
|
|
||
|
|
os = ASN1_item_pack(&rct, &CMS_Receipt_it, NULL);
|
||
|
|
|
||
|
|
err:
|
||
|
|
CMS_ReceiptRequest_free(rr);
|
||
|
|
return os;
|
||
|
|
}
|