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986 lines
23 KiB
C
986 lines
23 KiB
C
/* crypto/cms/cms_sd.c */
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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 "cryptlib.h"
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#include <openssl/asn1t.h>
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#include <openssl/pem.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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#include "asn1_locl.h"
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/* CMS SignedData Utilities */
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DECLARE_ASN1_ITEM(CMS_SignedData)
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static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms)
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{
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if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed)
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{
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CMSerr(CMS_F_CMS_GET0_SIGNED, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA);
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return NULL;
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}
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return cms->d.signedData;
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}
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static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms)
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{
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if (cms->d.other == NULL)
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{
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cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
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if (!cms->d.signedData)
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{
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CMSerr(CMS_F_CMS_SIGNED_DATA_INIT, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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cms->d.signedData->version = 1;
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cms->d.signedData->encapContentInfo->eContentType =
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OBJ_nid2obj(NID_pkcs7_data);
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cms->d.signedData->encapContentInfo->partial = 1;
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ASN1_OBJECT_free(cms->contentType);
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cms->contentType = OBJ_nid2obj(NID_pkcs7_signed);
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return cms->d.signedData;
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}
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return cms_get0_signed(cms);
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}
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/* Just initialize SignedData e.g. for certs only structure */
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int CMS_SignedData_init(CMS_ContentInfo *cms)
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{
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if (cms_signed_data_init(cms))
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return 1;
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else
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return 0;
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}
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/* Check structures and fixup version numbers (if necessary) */
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static void cms_sd_set_version(CMS_SignedData *sd)
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{
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int i;
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CMS_CertificateChoices *cch;
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CMS_RevocationInfoChoice *rch;
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CMS_SignerInfo *si;
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for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++)
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{
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cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
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if (cch->type == CMS_CERTCHOICE_OTHER)
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{
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if (sd->version < 5)
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sd->version = 5;
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}
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else if (cch->type == CMS_CERTCHOICE_V2ACERT)
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{
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if (sd->version < 4)
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sd->version = 4;
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}
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else if (cch->type == CMS_CERTCHOICE_V1ACERT)
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{
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if (sd->version < 3)
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sd->version = 3;
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}
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}
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for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++)
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{
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rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
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if (rch->type == CMS_REVCHOICE_OTHER)
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{
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if (sd->version < 5)
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sd->version = 5;
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}
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}
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if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
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&& (sd->version < 3))
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sd->version = 3;
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for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++)
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{
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si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
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if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
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{
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if (si->version < 3)
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si->version = 3;
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if (sd->version < 3)
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sd->version = 3;
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}
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else if (si->version < 1)
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si->version = 1;
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}
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if (sd->version < 1)
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sd->version = 1;
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}
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/* Copy an existing messageDigest value */
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static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si)
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{
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STACK_OF(CMS_SignerInfo) *sinfos;
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CMS_SignerInfo *sitmp;
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int i;
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sinfos = CMS_get0_SignerInfos(cms);
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for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
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{
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ASN1_OCTET_STRING *messageDigest;
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sitmp = sk_CMS_SignerInfo_value(sinfos, i);
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if (sitmp == si)
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continue;
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if (CMS_signed_get_attr_count(sitmp) < 0)
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continue;
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if (OBJ_cmp(si->digestAlgorithm->algorithm,
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sitmp->digestAlgorithm->algorithm))
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continue;
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messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
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OBJ_nid2obj(NID_pkcs9_messageDigest),
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-3, V_ASN1_OCTET_STRING);
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if (!messageDigest)
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{
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CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST,
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CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
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return 0;
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}
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if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
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V_ASN1_OCTET_STRING,
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messageDigest, -1))
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return 1;
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else
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return 0;
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}
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CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST);
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return 0;
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}
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int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type)
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{
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switch(type)
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{
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case CMS_SIGNERINFO_ISSUER_SERIAL:
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sid->d.issuerAndSerialNumber =
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M_ASN1_new_of(CMS_IssuerAndSerialNumber);
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if (!sid->d.issuerAndSerialNumber)
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goto merr;
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if (!X509_NAME_set(&sid->d.issuerAndSerialNumber->issuer,
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X509_get_issuer_name(cert)))
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goto merr;
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if (!ASN1_STRING_copy(
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sid->d.issuerAndSerialNumber->serialNumber,
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X509_get_serialNumber(cert)))
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goto merr;
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break;
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case CMS_SIGNERINFO_KEYIDENTIFIER:
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if (!cert->skid)
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{
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CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER,
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CMS_R_CERTIFICATE_HAS_NO_KEYID);
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return 0;
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}
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sid->d.subjectKeyIdentifier = ASN1_STRING_dup(cert->skid);
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if (!sid->d.subjectKeyIdentifier)
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goto merr;
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break;
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default:
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CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID);
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return 0;
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}
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sid->type = type;
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return 1;
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merr:
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CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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int cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid,
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ASN1_OCTET_STRING **keyid,
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X509_NAME **issuer, ASN1_INTEGER **sno)
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{
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if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
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{
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if (issuer)
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*issuer = sid->d.issuerAndSerialNumber->issuer;
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if (sno)
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*sno = sid->d.issuerAndSerialNumber->serialNumber;
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}
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else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
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{
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if (keyid)
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*keyid = sid->d.subjectKeyIdentifier;
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}
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else
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return 0;
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return 1;
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}
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int cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert)
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{
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int ret;
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if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
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{
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ret = X509_NAME_cmp(sid->d.issuerAndSerialNumber->issuer,
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X509_get_issuer_name(cert));
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if (ret)
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return ret;
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return ASN1_INTEGER_cmp(sid->d.issuerAndSerialNumber->serialNumber,
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X509_get_serialNumber(cert));
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}
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else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
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{
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X509_check_purpose(cert, -1, -1);
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if (!cert->skid)
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return -1;
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return ASN1_OCTET_STRING_cmp(sid->d.subjectKeyIdentifier,
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cert->skid);
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}
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else
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return -1;
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}
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CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
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X509 *signer, EVP_PKEY *pk, const EVP_MD *md,
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unsigned int flags)
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{
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CMS_SignedData *sd;
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CMS_SignerInfo *si = NULL;
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X509_ALGOR *alg;
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int i, type;
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if(!X509_check_private_key(signer, pk))
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{
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CMSerr(CMS_F_CMS_ADD1_SIGNER,
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CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
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return NULL;
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}
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sd = cms_signed_data_init(cms);
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if (!sd)
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goto err;
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si = M_ASN1_new_of(CMS_SignerInfo);
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if (!si)
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goto merr;
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X509_check_purpose(signer, -1, -1);
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CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
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CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
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si->pkey = pk;
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si->signer = signer;
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if (flags & CMS_USE_KEYID)
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{
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si->version = 3;
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if (sd->version < 3)
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sd->version = 3;
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type = CMS_SIGNERINFO_KEYIDENTIFIER;
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}
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else
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{
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type = CMS_SIGNERINFO_ISSUER_SERIAL;
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si->version = 1;
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}
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if (!cms_set1_SignerIdentifier(si->sid, signer, type))
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goto err;
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if (md == NULL)
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{
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int def_nid;
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if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0)
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goto err;
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md = EVP_get_digestbynid(def_nid);
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if (md == NULL)
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{
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CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DEFAULT_DIGEST);
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goto err;
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}
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}
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if (!md)
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{
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CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DIGEST_SET);
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goto err;
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}
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cms_DigestAlgorithm_set(si->digestAlgorithm, md);
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/* See if digest is present in digestAlgorithms */
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for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++)
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{
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ASN1_OBJECT *aoid;
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alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
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X509_ALGOR_get0(&aoid, NULL, NULL, alg);
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if (OBJ_obj2nid(aoid) == EVP_MD_type(md))
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break;
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}
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if (i == sk_X509_ALGOR_num(sd->digestAlgorithms))
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{
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alg = X509_ALGOR_new();
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if (!alg)
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goto merr;
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cms_DigestAlgorithm_set(alg, md);
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if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg))
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{
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X509_ALGOR_free(alg);
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goto merr;
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}
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}
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if (pk->ameth && pk->ameth->pkey_ctrl)
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{
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i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_SIGN,
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0, si);
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if (i == -2)
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{
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CMSerr(CMS_F_CMS_ADD1_SIGNER,
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CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
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goto err;
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}
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if (i <= 0)
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{
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CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_CTRL_FAILURE);
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goto err;
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}
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}
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|
|
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if (!(flags & CMS_NOATTR))
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{
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/* Initialialize signed attributes strutucture so other
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* attributes such as signing time etc are added later
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* even if we add none here.
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*/
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if (!si->signedAttrs)
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{
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si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
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if (!si->signedAttrs)
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goto merr;
|
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}
|
|
|
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if (!(flags & CMS_NOSMIMECAP))
|
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{
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STACK_OF(X509_ALGOR) *smcap = NULL;
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i = CMS_add_standard_smimecap(&smcap);
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if (i)
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i = CMS_add_smimecap(si, smcap);
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sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
|
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if (!i)
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goto merr;
|
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}
|
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if (flags & CMS_REUSE_DIGEST)
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|
{
|
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if (!cms_copy_messageDigest(cms, si))
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goto err;
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if (!(flags & CMS_PARTIAL) &&
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!CMS_SignerInfo_sign(si))
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (!(flags & CMS_NOCERTS))
|
|
{
|
|
/* NB ignore -1 return for duplicate cert */
|
|
if (!CMS_add1_cert(cms, signer))
|
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goto merr;
|
|
}
|
|
|
|
if (!sd->signerInfos)
|
|
sd->signerInfos = sk_CMS_SignerInfo_new_null();
|
|
if (!sd->signerInfos ||
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!sk_CMS_SignerInfo_push(sd->signerInfos, si))
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goto merr;
|
|
|
|
return si;
|
|
|
|
merr:
|
|
CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
|
|
err:
|
|
if (si)
|
|
M_ASN1_free_of(si, CMS_SignerInfo);
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|
return NULL;
|
|
|
|
}
|
|
|
|
static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
|
|
{
|
|
ASN1_TIME *tt;
|
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int r = 0;
|
|
if (t)
|
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tt = t;
|
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else
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|
tt = X509_gmtime_adj(NULL, 0);
|
|
|
|
if (!tt)
|
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goto merr;
|
|
|
|
if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
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tt->type, tt, -1) <= 0)
|
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goto merr;
|
|
|
|
r = 1;
|
|
|
|
merr:
|
|
|
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if (!t)
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ASN1_TIME_free(tt);
|
|
|
|
if (!r)
|
|
CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE);
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
|
|
{
|
|
CMS_SignedData *sd;
|
|
sd = cms_get0_signed(cms);
|
|
if (!sd)
|
|
return NULL;
|
|
return sd->signerInfos;
|
|
}
|
|
|
|
STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
|
|
{
|
|
STACK_OF(X509) *signers = NULL;
|
|
STACK_OF(CMS_SignerInfo) *sinfos;
|
|
CMS_SignerInfo *si;
|
|
int i;
|
|
sinfos = CMS_get0_SignerInfos(cms);
|
|
for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
|
|
{
|
|
si = sk_CMS_SignerInfo_value(sinfos, i);
|
|
if (si->signer)
|
|
{
|
|
if (!signers)
|
|
{
|
|
signers = sk_X509_new_null();
|
|
if (!signers)
|
|
return NULL;
|
|
}
|
|
if (!sk_X509_push(signers, si->signer))
|
|
{
|
|
sk_X509_free(signers);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
return signers;
|
|
}
|
|
|
|
void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
|
|
{
|
|
if (signer)
|
|
{
|
|
CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
|
|
if (si->pkey)
|
|
EVP_PKEY_free(si->pkey);
|
|
si->pkey = X509_get_pubkey(signer);
|
|
}
|
|
if (si->signer)
|
|
X509_free(si->signer);
|
|
si->signer = signer;
|
|
}
|
|
|
|
int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
|
|
ASN1_OCTET_STRING **keyid,
|
|
X509_NAME **issuer, ASN1_INTEGER **sno)
|
|
{
|
|
return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
|
|
}
|
|
|
|
int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
|
|
{
|
|
return cms_SignerIdentifier_cert_cmp(si->sid, cert);
|
|
}
|
|
|
|
int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
|
|
unsigned int flags)
|
|
{
|
|
CMS_SignedData *sd;
|
|
CMS_SignerInfo *si;
|
|
CMS_CertificateChoices *cch;
|
|
STACK_OF(CMS_CertificateChoices) *certs;
|
|
X509 *x;
|
|
int i, j;
|
|
int ret = 0;
|
|
sd = cms_get0_signed(cms);
|
|
if (!sd)
|
|
return -1;
|
|
certs = sd->certificates;
|
|
for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++)
|
|
{
|
|
si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
|
|
if (si->signer)
|
|
continue;
|
|
|
|
for (j = 0; j < sk_X509_num(scerts); j++)
|
|
{
|
|
x = sk_X509_value(scerts, j);
|
|
if (CMS_SignerInfo_cert_cmp(si, x) == 0)
|
|
{
|
|
CMS_SignerInfo_set1_signer_cert(si, x);
|
|
ret++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (si->signer || (flags & CMS_NOINTERN))
|
|
continue;
|
|
|
|
for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++)
|
|
{
|
|
cch = sk_CMS_CertificateChoices_value(certs, j);
|
|
if (cch->type != 0)
|
|
continue;
|
|
x = cch->d.certificate;
|
|
if (CMS_SignerInfo_cert_cmp(si, x) == 0)
|
|
{
|
|
CMS_SignerInfo_set1_signer_cert(si, x);
|
|
ret++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk, X509 **signer,
|
|
X509_ALGOR **pdig, X509_ALGOR **psig)
|
|
{
|
|
if (pk)
|
|
*pk = si->pkey;
|
|
if (signer)
|
|
*signer = si->signer;
|
|
if (pdig)
|
|
*pdig = si->digestAlgorithm;
|
|
if (psig)
|
|
*psig = si->signatureAlgorithm;
|
|
}
|
|
|
|
static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
|
|
CMS_SignerInfo *si, BIO *chain)
|
|
{
|
|
EVP_MD_CTX mctx;
|
|
int r = 0;
|
|
EVP_MD_CTX_init(&mctx);
|
|
|
|
|
|
if (!si->pkey)
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY);
|
|
return 0;
|
|
}
|
|
|
|
if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
|
|
goto err;
|
|
|
|
/* If any signed attributes calculate and add messageDigest attribute */
|
|
|
|
if (CMS_signed_get_attr_count(si) >= 0)
|
|
{
|
|
ASN1_OBJECT *ctype =
|
|
cms->d.signedData->encapContentInfo->eContentType;
|
|
unsigned char md[EVP_MAX_MD_SIZE];
|
|
unsigned int mdlen;
|
|
if (!EVP_DigestFinal_ex(&mctx, md, &mdlen))
|
|
goto err;
|
|
if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
|
|
V_ASN1_OCTET_STRING,
|
|
md, mdlen))
|
|
goto err;
|
|
/* Copy content type across */
|
|
if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
|
|
V_ASN1_OBJECT, ctype, -1) <= 0)
|
|
goto err;
|
|
if (!CMS_SignerInfo_sign(si))
|
|
goto err;
|
|
}
|
|
else
|
|
{
|
|
unsigned char *sig;
|
|
unsigned int siglen;
|
|
sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
|
|
if (!sig)
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (!EVP_SignFinal(&mctx, sig, &siglen, si->pkey))
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
|
|
CMS_R_SIGNFINAL_ERROR);
|
|
OPENSSL_free(sig);
|
|
goto err;
|
|
}
|
|
ASN1_STRING_set0(si->signature, sig, siglen);
|
|
}
|
|
|
|
r = 1;
|
|
|
|
err:
|
|
EVP_MD_CTX_cleanup(&mctx);
|
|
return r;
|
|
|
|
}
|
|
|
|
int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
|
|
{
|
|
STACK_OF(CMS_SignerInfo) *sinfos;
|
|
CMS_SignerInfo *si;
|
|
int i;
|
|
sinfos = CMS_get0_SignerInfos(cms);
|
|
for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
|
|
{
|
|
si = sk_CMS_SignerInfo_value(sinfos, i);
|
|
if (!cms_SignerInfo_content_sign(cms, si, chain))
|
|
return 0;
|
|
}
|
|
cms->d.signedData->encapContentInfo->partial = 0;
|
|
return 1;
|
|
}
|
|
|
|
int CMS_SignerInfo_sign(CMS_SignerInfo *si)
|
|
{
|
|
EVP_MD_CTX mctx;
|
|
EVP_PKEY_CTX *pctx;
|
|
unsigned char *abuf = NULL;
|
|
int alen;
|
|
size_t siglen;
|
|
const EVP_MD *md = NULL;
|
|
|
|
md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
|
|
if (md == NULL)
|
|
return 0;
|
|
|
|
EVP_MD_CTX_init(&mctx);
|
|
|
|
if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0)
|
|
{
|
|
if (!cms_add1_signingTime(si, NULL))
|
|
goto err;
|
|
}
|
|
|
|
if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
|
|
goto err;
|
|
|
|
if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
|
|
EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0)
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf,
|
|
ASN1_ITEM_rptr(CMS_Attributes_Sign));
|
|
if(!abuf)
|
|
goto err;
|
|
if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0)
|
|
goto err;
|
|
if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
|
|
goto err;
|
|
OPENSSL_free(abuf);
|
|
abuf = OPENSSL_malloc(siglen);
|
|
if(!abuf)
|
|
goto err;
|
|
if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
|
|
goto err;
|
|
|
|
if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
|
|
EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0)
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
EVP_MD_CTX_cleanup(&mctx);
|
|
|
|
ASN1_STRING_set0(si->signature, abuf, siglen);
|
|
|
|
return 1;
|
|
|
|
err:
|
|
if (abuf)
|
|
OPENSSL_free(abuf);
|
|
EVP_MD_CTX_cleanup(&mctx);
|
|
return 0;
|
|
|
|
}
|
|
|
|
int CMS_SignerInfo_verify(CMS_SignerInfo *si)
|
|
{
|
|
EVP_MD_CTX mctx;
|
|
EVP_PKEY_CTX *pctx;
|
|
unsigned char *abuf = NULL;
|
|
int alen, r = -1;
|
|
const EVP_MD *md = NULL;
|
|
|
|
if (!si->pkey)
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY);
|
|
return -1;
|
|
}
|
|
|
|
md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
|
|
if (md == NULL)
|
|
return -1;
|
|
EVP_MD_CTX_init(&mctx);
|
|
if (EVP_DigestVerifyInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
|
|
goto err;
|
|
|
|
alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf,
|
|
ASN1_ITEM_rptr(CMS_Attributes_Verify));
|
|
if(!abuf)
|
|
goto err;
|
|
r = EVP_DigestVerifyUpdate(&mctx, abuf, alen);
|
|
OPENSSL_free(abuf);
|
|
if (r <= 0)
|
|
{
|
|
r = -1;
|
|
goto err;
|
|
}
|
|
r = EVP_DigestVerifyFinal(&mctx,
|
|
si->signature->data, si->signature->length);
|
|
if (r <= 0)
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE);
|
|
err:
|
|
EVP_MD_CTX_cleanup(&mctx);
|
|
return r;
|
|
}
|
|
|
|
/* Create a chain of digest BIOs from a CMS ContentInfo */
|
|
|
|
BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms)
|
|
{
|
|
int i;
|
|
CMS_SignedData *sd;
|
|
BIO *chain = NULL;
|
|
sd = cms_get0_signed(cms);
|
|
if (!sd)
|
|
return NULL;
|
|
if (cms->d.signedData->encapContentInfo->partial)
|
|
cms_sd_set_version(sd);
|
|
for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++)
|
|
{
|
|
X509_ALGOR *digestAlgorithm;
|
|
BIO *mdbio;
|
|
digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
|
|
mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm);
|
|
if (!mdbio)
|
|
goto err;
|
|
if (chain)
|
|
BIO_push(chain, mdbio);
|
|
else
|
|
chain = mdbio;
|
|
}
|
|
return chain;
|
|
err:
|
|
if (chain)
|
|
BIO_free_all(chain);
|
|
return NULL;
|
|
}
|
|
|
|
int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
|
|
{
|
|
ASN1_OCTET_STRING *os = NULL;
|
|
EVP_MD_CTX mctx;
|
|
int r = -1;
|
|
EVP_MD_CTX_init(&mctx);
|
|
/* If we have any signed attributes look for messageDigest value */
|
|
if (CMS_signed_get_attr_count(si) >= 0)
|
|
{
|
|
os = CMS_signed_get0_data_by_OBJ(si,
|
|
OBJ_nid2obj(NID_pkcs9_messageDigest),
|
|
-3, V_ASN1_OCTET_STRING);
|
|
if (!os)
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
|
|
CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
|
|
goto err;
|
|
|
|
/* If messageDigest found compare it */
|
|
|
|
if (os)
|
|
{
|
|
unsigned char mval[EVP_MAX_MD_SIZE];
|
|
unsigned int mlen;
|
|
if (EVP_DigestFinal_ex(&mctx, mval, &mlen) <= 0)
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
|
|
CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
|
|
goto err;
|
|
}
|
|
if (mlen != (unsigned int)os->length)
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
|
|
CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
|
|
goto err;
|
|
}
|
|
|
|
if (memcmp(mval, os->data, mlen))
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
|
|
CMS_R_VERIFICATION_FAILURE);
|
|
r = 0;
|
|
}
|
|
else
|
|
r = 1;
|
|
}
|
|
else
|
|
{
|
|
r = EVP_VerifyFinal(&mctx, si->signature->data,
|
|
si->signature->length, si->pkey);
|
|
if (r <= 0)
|
|
{
|
|
CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
|
|
CMS_R_VERIFICATION_FAILURE);
|
|
r = 0;
|
|
}
|
|
}
|
|
|
|
err:
|
|
EVP_MD_CTX_cleanup(&mctx);
|
|
return r;
|
|
|
|
}
|
|
|
|
int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
|
|
{
|
|
unsigned char *smder = NULL;
|
|
int smderlen, r;
|
|
smderlen = i2d_X509_ALGORS(algs, &smder);
|
|
if (smderlen <= 0)
|
|
return 0;
|
|
r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
|
|
V_ASN1_SEQUENCE, smder, smderlen);
|
|
OPENSSL_free(smder);
|
|
return r;
|
|
}
|
|
|
|
int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
|
|
int algnid, int keysize)
|
|
{
|
|
X509_ALGOR *alg;
|
|
ASN1_INTEGER *key = NULL;
|
|
if (keysize > 0)
|
|
{
|
|
key = ASN1_INTEGER_new();
|
|
if (!key || !ASN1_INTEGER_set(key, keysize))
|
|
return 0;
|
|
}
|
|
alg = X509_ALGOR_new();
|
|
if (!alg)
|
|
{
|
|
if (key)
|
|
ASN1_INTEGER_free(key);
|
|
return 0;
|
|
}
|
|
|
|
X509_ALGOR_set0(alg, OBJ_nid2obj(algnid),
|
|
key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key);
|
|
if (!*algs)
|
|
*algs = sk_X509_ALGOR_new_null();
|
|
if (!*algs || !sk_X509_ALGOR_push(*algs, alg))
|
|
{
|
|
X509_ALGOR_free(alg);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Check to see if a cipher exists and if so add S/MIME capabilities */
|
|
|
|
static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
|
|
{
|
|
if (EVP_get_cipherbynid(nid))
|
|
return CMS_add_simple_smimecap(sk, nid, arg);
|
|
return 1;
|
|
}
|
|
|
|
static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
|
|
{
|
|
if (EVP_get_digestbynid(nid))
|
|
return CMS_add_simple_smimecap(sk, nid, arg);
|
|
return 1;
|
|
}
|
|
|
|
int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
|
|
{
|
|
if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
|
|
|| !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
|
|
|| !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
|
|
|| !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
|
|
|| !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
|
|
|| !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
|
|
|| !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
|
|
|| !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
|
|
|| !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
|
|
|| !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
|
|
return 0;
|
|
return 1;
|
|
}
|