diff options
Diffstat (limited to 'src/VBox/Runtime/common/crypto/pkcs7-asn1-decoder.cpp')
| -rw-r--r-- | src/VBox/Runtime/common/crypto/pkcs7-asn1-decoder.cpp | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/crypto/pkcs7-asn1-decoder.cpp b/src/VBox/Runtime/common/crypto/pkcs7-asn1-decoder.cpp new file mode 100644 index 00000000..93690fe8 --- /dev/null +++ b/src/VBox/Runtime/common/crypto/pkcs7-asn1-decoder.cpp @@ -0,0 +1,174 @@ +/* $Id: pkcs7-asn1-decoder.cpp $ */ +/** @file + * IPRT - Crypto - PKCS \#7, Decoder for ASN.1. + */ + +/* + * 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/crypto/spc.h> +#include <iprt/crypto/tsp.h> + +#include "pkcs7-internal.h" + + +/* + * PKCS #7 ContentInfo + */ +typedef enum RTCRPKCS7CONTENTINFOCHOICE +{ + RTCRPKCS7CONTENTINFOCHOICE_INVALID = 0, + RTCRPKCS7CONTENTINFOCHOICE_UNKNOWN, + RTCRPKCS7CONTENTINFOCHOICE_SIGNED_DATA, + RTCRPKCS7CONTENTINFOCHOICE_SPC_INDIRECT_DATA_CONTENT, + RTCRPKCS7CONTENTINFOCHOICE_TSP_TST_INFO, + RTCRPKCS7CONTENTINFOCHOICE_END, + RTCRPKCS7CONTENTINFOCHOICE_32BIT_HACK = 0x7fffffff +} RTCRPKCS7CONTENTINFOCHOICE; + +static int rtCrPkcs7ContentInfo_DecodeExtra(PRTASN1CURSOR pCursor, uint32_t fFlags, PRTCRPKCS7CONTENTINFO pThis, + const char *pszErrorTag) +{ + RT_NOREF_PV(fFlags); RT_NOREF_PV(pszErrorTag); + pThis->u.pCore = NULL; + + /* + * Figure the type. + */ + RTCRPKCS7CONTENTINFOCHOICE enmChoice; + size_t cbContent = 0; + if (RTAsn1ObjId_CompareWithString(&pThis->ContentType, RTCRPKCS7SIGNEDDATA_OID) == 0) + { + enmChoice = RTCRPKCS7CONTENTINFOCHOICE_SIGNED_DATA; + cbContent = sizeof(*pThis->u.pSignedData); + } + else if (RTAsn1ObjId_CompareWithString(&pThis->ContentType, RTCRSPCINDIRECTDATACONTENT_OID) == 0) + { + enmChoice = RTCRPKCS7CONTENTINFOCHOICE_SPC_INDIRECT_DATA_CONTENT; + cbContent = sizeof(*pThis->u.pIndirectDataContent); + } + else if (RTAsn1ObjId_CompareWithString(&pThis->ContentType, RTCRTSPTSTINFO_OID) == 0) + { + enmChoice = RTCRPKCS7CONTENTINFOCHOICE_TSP_TST_INFO; + cbContent = sizeof(*pThis->u.pTstInfo); + } + else + { + enmChoice = RTCRPKCS7CONTENTINFOCHOICE_UNKNOWN; + cbContent = 0; + } + + int rc = VINF_SUCCESS; + if (enmChoice != RTCRPKCS7CONTENTINFOCHOICE_UNKNOWN) + { + /* + * Detect CMS octet string format and open the content cursor. + * + * Current we don't have any octent string content which, they're all + * sequences, which make detection so much simpler. + */ + PRTASN1OCTETSTRING pOctetString = &pThis->Content; + RTASN1CURSOR ContentCursor; + rc = RTAsn1CursorInitSubFromCore(pCursor, &pThis->Content.Asn1Core, &ContentCursor, "Content"); + if ( RT_SUCCESS(rc) + && RTAsn1CursorIsNextEx(&ContentCursor, ASN1_TAG_OCTET_STRING, ASN1_TAGFLAG_PRIMITIVE | ASN1_TAGCLASS_UNIVERSAL)) + { + rc = RTAsn1MemAllocZ(&pThis->Content.EncapsulatedAllocation, (void **)&pThis->Content.pEncapsulated, + sizeof(*pOctetString)); + if (RT_SUCCESS(rc)) + { + pThis->pCmsContent = pOctetString = (PRTASN1OCTETSTRING)pThis->Content.pEncapsulated; + rc = RTAsn1OctetString_DecodeAsn1(&ContentCursor, 0, pOctetString, "CmsContent"); + if (RT_SUCCESS(rc)) + rc = RTAsn1CursorCheckEnd(&ContentCursor); + if (RT_SUCCESS(rc)) + rc = RTAsn1CursorInitSubFromCore(pCursor, &pOctetString->Asn1Core, &ContentCursor, "CmsContent"); + } + } + if (RT_SUCCESS(rc)) + { + /* + * Allocate memory for the decoded content. + */ + rc = RTAsn1MemAllocZ(&pOctetString->EncapsulatedAllocation, (void **)&pOctetString->pEncapsulated, cbContent); + if (RT_SUCCESS(rc)) + { + pThis->u.pCore = pOctetString->pEncapsulated; + + /* + * Decode it. + */ + switch (enmChoice) + { + case RTCRPKCS7CONTENTINFOCHOICE_SIGNED_DATA: + rc = RTCrPkcs7SignedData_DecodeAsn1(&ContentCursor, 0, pThis->u.pSignedData, "SignedData"); + break; + case RTCRPKCS7CONTENTINFOCHOICE_SPC_INDIRECT_DATA_CONTENT: + rc = RTCrSpcIndirectDataContent_DecodeAsn1(&ContentCursor, 0, pThis->u.pIndirectDataContent, + "IndirectDataContent"); + break; + case RTCRPKCS7CONTENTINFOCHOICE_TSP_TST_INFO: + rc = RTCrTspTstInfo_DecodeAsn1(&ContentCursor, 0, pThis->u.pTstInfo, "TstInfo"); + break; + default: + AssertFailed(); + rc = VERR_IPE_NOT_REACHED_DEFAULT_CASE; + break; + } + if (RT_SUCCESS(rc)) + rc = RTAsn1CursorCheckOctStrEnd(&ContentCursor, &pThis->Content); + if (RT_SUCCESS(rc)) + return VINF_SUCCESS; + + RTAsn1MemFree(&pOctetString->EncapsulatedAllocation, pOctetString->pEncapsulated); + pOctetString->pEncapsulated = NULL; + pThis->u.pCore = NULL; + } + } + } + return rc; +} + + +/* + * Generate the code. + */ +#include <iprt/asn1-generator-asn1-decoder.h> + |