/* $Id: asn1-ut-string-decode.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */ /** @file * IPRT - ASN.1, XXX STRING Types, Decoding. */ /* * Copyright (C) 2006-2022 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 #include #include #include #include #include RTDECL(int) RTAsn1String_DecodeAsn1(PRTASN1CURSOR pCursor, uint32_t fFlags, PRTASN1STRING pThis, const char *pszErrorTag) { RT_ZERO(*pThis); AssertReturn(!(fFlags & RTASN1CURSOR_GET_F_IMPLICIT), VERR_INVALID_PARAMETER); int rc = RTAsn1CursorReadHdr(pCursor, &pThis->Asn1Core, pszErrorTag); if (RT_SUCCESS(rc)) { /* * Do tag matching. */ switch (pThis->Asn1Core.uTag) { case ASN1_TAG_UTF8_STRING: case ASN1_TAG_NUMERIC_STRING: case ASN1_TAG_PRINTABLE_STRING: case ASN1_TAG_T61_STRING: case ASN1_TAG_VIDEOTEX_STRING: case ASN1_TAG_IA5_STRING: case ASN1_TAG_GENERALIZED_TIME: case ASN1_TAG_GRAPHIC_STRING: case ASN1_TAG_VISIBLE_STRING: case ASN1_TAG_GENERAL_STRING: case ASN1_TAG_UNIVERSAL_STRING: case ASN1_TAG_BMP_STRING: rc = VINF_SUCCESS; break; default: rc = RTAsn1CursorSetInfo(pCursor, VERR_ASN1_CURSOR_TAG_MISMATCH, "%s: Not a string object: fClass=%#x / uTag=%#x", pszErrorTag, pThis->Asn1Core.fClass, pThis->Asn1Core.uTag); } if (RT_SUCCESS(rc)) { /* * Match flags. CER/DER makes it complicated. */ if (pThis->Asn1Core.fClass == (ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_PRIMITIVE)) { /* * Primitive strings are simple. */ RTAsn1CursorSkip(pCursor, pThis->Asn1Core.cb); pThis->Asn1Core.pOps = &g_RTAsn1String_Vtable; pThis->Asn1Core.fFlags |= RTASN1CORE_F_PRIMITE_TAG_STRUCT; RTAsn1CursorInitAllocation(pCursor, &pThis->Allocation); /* UTF-8 conversion is done lazily, upon request. */ return VINF_SUCCESS; } if (pThis->Asn1Core.fClass == (ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_CONSTRUCTED)) { /* * Constructed strings are not yet fully implemented. */ if (pCursor->fFlags & RTASN1CURSOR_FLAGS_DER) rc = RTAsn1CursorSetInfo(pCursor, VERR_ASN1_CURSOR_ILLEGAL_CONSTRUCTED_STRING, "%s: DER encoding does not allow constructed strings (cb=%#x uTag=%#x fClass=%#x)", pszErrorTag, pThis->Asn1Core.cb, pThis->Asn1Core.uTag, pThis->Asn1Core.fClass); else if (pCursor->fFlags & RTASN1CURSOR_FLAGS_CER) { if (pThis->Asn1Core.cb > 1000) rc = VINF_SUCCESS; else rc = RTAsn1CursorSetInfo(pCursor, VERR_ASN1_CURSOR_ILLEGAL_CONSTRUCTED_STRING, "%s: Constructed strings only allowed for >1000 byte in CER encoding: cb=%#x uTag=%#x fClass=%#x", pszErrorTag, pThis->Asn1Core.cb, pThis->Asn1Core.uTag, pThis->Asn1Core.fClass); } /** @todo implement constructed strings. */ if (RT_SUCCESS(rc)) rc = RTAsn1CursorSetInfo(pCursor, VERR_ASN1_CONSTRUCTED_STRING_NOT_IMPL, "%s: Support for constructed strings is not implemented", pszErrorTag); } else rc = RTAsn1CursorSetInfo(pCursor, VERR_ASN1_CURSOR_TAG_FLAG_CLASS_MISMATCH, "%s: Not a valid string object: fClass=%#x / uTag=%#x", pszErrorTag, pThis->Asn1Core.fClass, pThis->Asn1Core.uTag); } } RT_ZERO(*pThis); return rc; } /** * Common worker for the specific string type getters. * * @returns IPRT status code * @param pCursor The cursor. * @param fFlags The RTASN1CURSOR_GET_F_XXX flags. * @param uTag The string tag. * @param pThis The output object. * @param pszErrorTag The error tag. * @param pszWhat The string type name. */ static int rtAsn1XxxString_DecodeAsn1(PRTASN1CURSOR pCursor, uint32_t fFlags, uint8_t uTag, PRTASN1STRING pThis, const char *pszErrorTag, const char *pszWhat) { pThis->cchUtf8 = 0; pThis->pszUtf8 = NULL; int rc = RTAsn1CursorReadHdr(pCursor, &pThis->Asn1Core, pszErrorTag); if (RT_SUCCESS(rc)) { rc = RTAsn1CursorMatchTagClassFlagsString(pCursor, &pThis->Asn1Core, uTag, ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_PRIMITIVE, fFlags, pszErrorTag, pszWhat); if (RT_SUCCESS(rc)) { if (!(pThis->Asn1Core.fClass & ASN1_TAGFLAG_CONSTRUCTED)) { RTAsn1CursorSkip(pCursor, pThis->Asn1Core.cb); pThis->Asn1Core.pOps = &g_RTAsn1String_Vtable; pThis->Asn1Core.fFlags |= RTASN1CORE_F_PRIMITE_TAG_STRUCT; RTAsn1CursorInitAllocation(pCursor, &pThis->Allocation); /* UTF-8 conversion is done lazily, upon request. */ return VINF_SUCCESS; } rc = RTAsn1CursorSetInfo(pCursor, VERR_ASN1_CONSTRUCTED_STRING_NOT_IMPL, "%s: Constructed %s not implemented.", pszErrorTag, pszWhat); } } RT_ZERO(*pThis); return rc; } /* * Generate code for the tag specific decoders. */ #define RTASN1STRING_IMPL(a_uTag, a_szTag, a_Api) \ RTDECL(int) RT_CONCAT(a_Api,_DecodeAsn1)(PRTASN1CURSOR pCursor, uint32_t fFlags, \ PRTASN1STRING pThis, const char *pszErrorTag) \ { \ return rtAsn1XxxString_DecodeAsn1(pCursor, fFlags, a_uTag, pThis, pszErrorTag, a_szTag); \ } #include "asn1-ut-string-template2.h" /* * Generate code for the associated collection types. */ #define RTASN1TMPL_TEMPLATE_FILE "../common/asn1/asn1-ut-string-template.h" #include #include