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/* $Id: x509-asn1-decoder.cpp $ */
/** @file
* IPRT - Crypto - X.509, Decoder for ASN.1.
*/
/*
* Copyright (C) 2006-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/crypto/x509.h>
#include <iprt/errcore.h>
#include <iprt/string.h>
#include "x509-internal.h"
/*
* One X.509 Extension.
*/
RTDECL(int) RTCrX509Extension_ExtnValue_DecodeAsn1(PRTASN1CURSOR pCursor, uint32_t fFlags,
PRTCRX509EXTENSION pThis, const char *pszErrorTag)
{
RT_NOREF_PV(fFlags); RT_NOREF_PV(pszErrorTag);
pThis->enmValue = RTCRX509EXTENSIONVALUE_UNKNOWN;
/*
* Decode the encapsulated extension bytes if know the format.
*/
RTASN1CURSOR ValueCursor;
int rc = RTAsn1CursorInitSubFromCore(pCursor, &pThis->ExtnValue.Asn1Core, &ValueCursor, "ExtnValue");
if (RT_FAILURE(rc))
return rc;
pCursor = &ValueCursor;
if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_AUTHORITY_KEY_IDENTIFIER_OID) == 0)
{
/* 4.2.1.1 Authority Key Identifier */
PRTCRX509AUTHORITYKEYIDENTIFIER pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->SeqCore.Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_AUTHORITY_KEY_IDENTIFIER;
rc = RTCrX509AuthorityKeyIdentifier_DecodeAsn1(&ValueCursor, 0, pThat, "AuthorityKeyIdentifier");
}
}
else if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_OLD_AUTHORITY_KEY_IDENTIFIER_OID) == 0)
{
/* Old and obsolete version of the above, still found in microsoft certificates. */
PRTCRX509OLDAUTHORITYKEYIDENTIFIER pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->SeqCore.Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_OLD_AUTHORITY_KEY_IDENTIFIER;
rc = RTCrX509OldAuthorityKeyIdentifier_DecodeAsn1(&ValueCursor, 0, pThat, "OldAuthorityKeyIdentifier");
}
}
else if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_SUBJECT_KEY_IDENTIFIER_OID) == 0)
{
/* 4.2.1.2 Subject Key Identifier */
PRTASN1OCTETSTRING pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_OCTET_STRING;
rc = RTAsn1CursorGetOctetString(&ValueCursor, 0, pThat, "SubjectKeyIdentifier");
}
}
else if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_KEY_USAGE_OID) == 0)
{
/* 4.2.1.3 Key Usage */
PRTASN1BITSTRING pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_BIT_STRING;
rc = RTAsn1CursorGetBitStringEx(&ValueCursor, 0, 9, pThat, "KeyUsage");
}
}
else if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_CERTIFICATE_POLICIES_OID) == 0)
{
/* 4.2.1.4 Certificate Policies */
PRTCRX509CERTIFICATEPOLICIES pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->SeqCore.Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_CERTIFICATE_POLICIES;
rc = RTCrX509CertificatePolicies_DecodeAsn1(&ValueCursor, 0, pThat, "CertPolicies");
}
}
else if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_POLICY_MAPPINGS_OID) == 0)
{
/* 4.2.1.5 Policy Mappings */
PRTCRX509POLICYMAPPINGS pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->SeqCore.Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_POLICY_MAPPINGS;
rc = RTCrX509PolicyMappings_DecodeAsn1(&ValueCursor, 0, pThat, "PolicyMapppings");
}
}
else if ( RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_SUBJECT_ALT_NAME_OID) == 0
|| RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_ISSUER_ALT_NAME_OID) == 0)
{
/* 4.2.1.6 Subject Alternative Name / 4.2.1.7 Issuer Alternative Name */
PRTCRX509GENERALNAMES pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->SeqCore.Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_GENERAL_NAMES;
rc = RTCrX509GeneralNames_DecodeAsn1(&ValueCursor, 0, pThat, "AltName");
}
}
else if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_BASIC_CONSTRAINTS_OID) == 0)
{
/* 4.2.1.9 Basic Constraints */
PRTCRX509BASICCONSTRAINTS pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->SeqCore.Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_BASIC_CONSTRAINTS;
rc = RTCrX509BasicConstraints_DecodeAsn1(&ValueCursor, 0, pThat, "BasicConstraints");
}
}
else if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_NAME_CONSTRAINTS_OID) == 0)
{
/* 4.2.1.10 Name Constraints */
PRTCRX509NAMECONSTRAINTS pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->SeqCore.Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_NAME_CONSTRAINTS;
rc = RTCrX509NameConstraints_DecodeAsn1(&ValueCursor, 0, pThat, "NameConstraints");
}
}
else if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_POLICY_CONSTRAINTS_OID) == 0)
{
/* 4.2.1.11 Policy Constraints */
PRTCRX509POLICYCONSTRAINTS pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->SeqCore.Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_POLICY_CONSTRAINTS;
rc = RTCrX509PolicyConstraints_DecodeAsn1(&ValueCursor, 0, pThat, "PolicyConstraints");
}
}
else if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_EXT_KEY_USAGE_OID) == 0)
{
/* 4.2.1.12 Extended Key Usage */
PRTASN1SEQOFOBJIDS pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->SeqCore.Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_SEQ_OF_OBJ_IDS;
rc = RTAsn1SeqOfObjIds_DecodeAsn1(&ValueCursor, 0, pThat, "ExKeyUsage");
}
}
else if (RTAsn1ObjId_CompareWithString(&pThis->ExtnId, RTCRX509_ID_CE_EXT_KEY_USAGE_OID) == 0)
{
/* 4.2.1.14 Inhibit anyPolicy */
PRTASN1INTEGER pThat;
rc = RTAsn1MemAllocZ(&pThis->ExtnValue.EncapsulatedAllocation, (void **)&pThat, sizeof(*pThat));
if (RT_SUCCESS(rc))
{
pThis->ExtnValue.pEncapsulated = &pThat->Asn1Core;
pThis->enmValue = RTCRX509EXTENSIONVALUE_INTEGER;
rc = RTAsn1CursorGetInteger(&ValueCursor, 0, pThat, "InhibitAnyPolicy");
}
}
else
return VINF_SUCCESS;
if (RT_SUCCESS(rc))
rc = RTAsn1CursorCheckEnd(&ValueCursor);
if (RT_SUCCESS(rc))
return VINF_SUCCESS;
return rc;
}
/*
* Generate the code.
*/
#include <iprt/asn1-generator-asn1-decoder.h>
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