/* $Id: pkcs7-sanity.cpp 100442 2023-07-08 11:10:51Z vboxsync $ */ /** @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 . * * 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 #include #include //#include #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