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/* $Id: pkcs7-sanity.cpp $ */
/** @file
* IPRT - Crypto - PKCS \#7, Sanity Checkers.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/crypto/pkcs7.h>
#include <iprt/err.h>
#include <iprt/string.h>
//#include <iprt/stream.h>
#include "pkcs7-internal.h"
static int rtCrPkcs7SignedData_CheckSanityExtra(PCRTCRPKCS7SIGNEDDATA pSignedData, uint32_t fFlags,
PRTERRINFO pErrInfo, const char *pszErrorTag)
{
bool const fAuthenticode = RT_BOOL(fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_AUTHENTICODE);
RT_NOREF_PV(fFlags);
//RTAsn1Dump(&pSignedData->SeqCore.Asn1Core, 0, 0, RTAsn1DumpStrmPrintfV, g_pStdOut);
if ( RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V1) != 0
&& RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V3) != 0
&& RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V4) != 0
&& RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V5) != 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNED_DATA_VERSION, "SignedData version is %llu, expected %u",
pSignedData->Version.uValue.u, RTCRPKCS7SIGNEDDATA_V1);
/*
* DigestAlgorithms.
*/
if (pSignedData->DigestAlgorithms.cItems == 0) /** @todo this might be too strict */
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_SIGNED_DATA_NO_DIGEST_ALGOS, "SignedData.DigestAlgorithms is empty");
if (pSignedData->DigestAlgorithms.cItems != 1 && fAuthenticode)
return RTErrInfoSetF(pErrInfo, VERR_CR_SPC_NOT_EXACTLY_ONE_DIGEST_ALGO,
"%s: SignedData.DigestAlgorithms has more than one algorithm (%u)",
pszErrorTag, pSignedData->DigestAlgorithms.cItems);
if (fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_ONLY_KNOWN_HASH)
for (uint32_t i = 0; i < pSignedData->DigestAlgorithms.cItems; i++)
{
if ( RTCrX509AlgorithmIdentifier_GetDigestType(pSignedData->DigestAlgorithms.papItems[i],
true /*fPureDigestsOnly*/)
== RTDIGESTTYPE_INVALID)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_UNKNOWN_DIGEST_ALGORITHM,
"%s: SignedData.DigestAlgorithms[%i] is not known: %s",
pszErrorTag, i, pSignedData->DigestAlgorithms.papItems[i]->Algorithm.szObjId);
if ( pSignedData->DigestAlgorithms.papItems[i]->Parameters.enmType != RTASN1TYPE_NULL
&& pSignedData->DigestAlgorithms.papItems[i]->Parameters.enmType != RTASN1TYPE_NOT_PRESENT)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_DIGEST_PARAMS_NOT_IMPL,
"%s: SignedData.DigestAlgorithms[%i] has parameters: tag=%u",
pszErrorTag, i, pSignedData->DigestAlgorithms.papItems[i]->Parameters.u.Core.uTag);
}
/*
* Certificates.
*/
if ( (fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_SIGNING_CERT_PRESENT)
&& pSignedData->Certificates.cItems == 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_NO_CERTIFICATES,
"%s: SignedData.Certifcates is empty, expected at least one certificate", pszErrorTag);
/*
* Crls.
*/
if (fAuthenticode && RTAsn1Core_IsPresent(&pSignedData->Crls))
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_EXPECTED_NO_CRLS,
"%s: SignedData.Crls is not empty as expected for authenticode.", pszErrorTag);
/** @todo check Crls when they become important. */
/*
* SignerInfos.
*/
if (pSignedData->SignerInfos.cItems == 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_NO_SIGNER_INFOS, "%s: SignedData.SignerInfos is empty?", pszErrorTag);
if (fAuthenticode && pSignedData->SignerInfos.cItems != 1)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_EXPECTED_ONE_SIGNER_INFO,
"%s: SignedData.SignerInfos should have one entry for authenticode: %u",
pszErrorTag, pSignedData->SignerInfos.cItems);
for (uint32_t i = 0; i < pSignedData->SignerInfos.cItems; i++)
{
PCRTCRPKCS7SIGNERINFO pSignerInfo = pSignedData->SignerInfos.papItems[i];
if (RTAsn1Integer_UnsignedCompareWithU32(&pSignerInfo->Version, RTCRPKCS7SIGNERINFO_V1) != 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_INFO_VERSION,
"%s: SignedData.SignerInfos[%u] version is %llu, expected %u",
pszErrorTag, i, pSignerInfo->Version.uValue.u, RTCRPKCS7SIGNERINFO_V1);
/* IssuerAndSerialNumber. */
int rc = RTCrX509Name_CheckSanity(&pSignerInfo->IssuerAndSerialNumber.Name, 0, pErrInfo,
"SignedData.SignerInfos[#].IssuerAndSerialNumber.Name");
if (RT_FAILURE(rc))
return rc;
if (pSignerInfo->IssuerAndSerialNumber.SerialNumber.Asn1Core.cb == 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_INFO_NO_ISSUER_SERIAL_NO,
"%s: SignedData.SignerInfos[%u].IssuerAndSerialNumber.SerialNumber is missing (zero length)",
pszErrorTag, i);
PCRTCRX509CERTIFICATE pCert;
pCert = RTCrPkcs7SetOfCerts_FindX509ByIssuerAndSerialNumber(&pSignedData->Certificates,
&pSignerInfo->IssuerAndSerialNumber.Name,
&pSignerInfo->IssuerAndSerialNumber.SerialNumber);
if (!pCert && (fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_SIGNING_CERT_PRESENT))
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_CERT_NOT_SHIPPED,
"%s: SignedData.SignerInfos[%u].IssuerAndSerialNumber not found in T0.Certificates",
pszErrorTag, i);
/* DigestAlgorithm */
uint32_t j = 0;
while ( j < pSignedData->DigestAlgorithms.cItems
&& RTCrX509AlgorithmIdentifier_Compare(pSignedData->DigestAlgorithms.papItems[j],
&pSignerInfo->DigestAlgorithm) != 0)
j++;
if (j >= pSignedData->DigestAlgorithms.cItems)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_DIGEST_ALGO_NOT_FOUND_IN_LIST,
"%s: SignedData.SignerInfos[%u].DigestAlgorithm (%s) not found in SignedData.DigestAlgorithms",
pszErrorTag, i, pSignerInfo->DigestAlgorithm.Algorithm.szObjId);
/* Digest encryption algorithm. */
#if 0 /** @todo Unimportant: Seen timestamp signatures specifying pkcs1-Sha256WithRsaEncryption in SignerInfo and just RSA in the certificate. Figure out how to compare the two. */
if ( pCert
&& RTCrX509AlgorithmIdentifier_Compare(&pSignerInfo->DigestEncryptionAlgorithm,
&pCert->TbsCertificate.SubjectPublicKeyInfo.Algorithm) != 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_INFO_DIGEST_ENCRYPT_MISMATCH,
"SignedData.SignerInfos[%u].DigestEncryptionAlgorithm (%s) mismatch with certificate (%s)",
i, pSignerInfo->DigestEncryptionAlgorithm.Algorithm.szObjId,
pCert->TbsCertificate.SubjectPublicKeyInfo.Algorithm.Algorithm.szObjId);
#endif
/* Authenticated attributes we know. */
if (RTCrPkcs7Attributes_IsPresent(&pSignerInfo->AuthenticatedAttributes))
{
bool fFoundContentInfo = false;
bool fFoundMessageDigest = false;
for (j = 0; j < pSignerInfo->AuthenticatedAttributes.cItems; j++)
{
PCRTCRPKCS7ATTRIBUTE pAttrib = pSignerInfo->AuthenticatedAttributes.papItems[j];
if (RTAsn1ObjId_CompareWithString(&pAttrib->Type, RTCR_PKCS9_ID_CONTENT_TYPE_OID) == 0)
{
if (fFoundContentInfo)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_MISSING_CONTENT_TYPE_ATTRIB,
"%s: Multiple authenticated content-type attributes.", pszErrorTag);
fFoundContentInfo = true;
AssertReturn(pAttrib->enmType == RTCRPKCS7ATTRIBUTETYPE_OBJ_IDS, VERR_INTERNAL_ERROR_3);
if (pAttrib->uValues.pObjIds->cItems != 1)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_BAD_CONTENT_TYPE_ATTRIB,
"%s: Expected exactly one value for content-type attrib, found: %u",
pszErrorTag, pAttrib->uValues.pObjIds->cItems);
}
else if (RTAsn1ObjId_CompareWithString(&pAttrib->Type, RTCR_PKCS9_ID_MESSAGE_DIGEST_OID) == 0)
{
if (fFoundMessageDigest)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_MISSING_MESSAGE_DIGEST_ATTRIB,
"%s: Multiple authenticated message-digest attributes.", pszErrorTag);
fFoundMessageDigest = true;
AssertReturn(pAttrib->enmType == RTCRPKCS7ATTRIBUTETYPE_OCTET_STRINGS, VERR_INTERNAL_ERROR_3);
if (pAttrib->uValues.pOctetStrings->cItems != 1)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_BAD_CONTENT_TYPE_ATTRIB,
"%s: Expected exactly one value for message-digest attrib, found: %u",
pszErrorTag, pAttrib->uValues.pOctetStrings->cItems);
}
}
if (!fFoundContentInfo)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_MISSING_CONTENT_TYPE_ATTRIB,
"%s: Missing authenticated content-type attribute.", pszErrorTag);
if (!fFoundMessageDigest)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_MISSING_MESSAGE_DIGEST_ATTRIB,
"%s: Missing authenticated message-digest attribute.", pszErrorTag);
}
}
return VINF_SUCCESS;
}
/*
* Generate the code.
*/
#include <iprt/asn1-generator-sanity.h>
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