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/* $Id: RTCrStoreCertExportAsPem.cpp $ */
/** @file
* IPRT - Cryptographic (Certificate) Store, RTCrStoreCertExportAsPem.
*/
/*
* 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/store.h>
#include <iprt/assert.h>
#include <iprt/base64.h>
#include <iprt/dir.h>
#include <iprt/errcore.h>
#include <iprt/mem.h>
#include <iprt/stream.h>
RTDECL(int) RTCrStoreCertExportAsPem(RTCRSTORE hStore, uint32_t fFlags, const char *pszFilename)
{
/*
* Validate input.
*/
AssertReturn(!fFlags, VERR_INVALID_FLAGS);
/*
* Start the enumeration first as this validates the store handle.
*/
RTCRSTORECERTSEARCH Search;
int rc = RTCrStoreCertFindAll(hStore, &Search);
if (RT_SUCCESS(rc))
{
/*
* Open the file for writing.
*
* Note! We must use text and no binary here, because the base-64 API
* below will use host specific EOL markers, not CRLF as PEM
* specifies.
*/
PRTSTREAM hStrm;
rc = RTStrmOpen(pszFilename, "w", &hStrm);
if (RT_SUCCESS(rc))
{
/*
* Enumerate the certificates in the store, writing them out one by one.
*/
size_t cbBase64 = 0;
char *pszBase64 = NULL;
PCRTCRCERTCTX pCertCtx;
while ((pCertCtx = RTCrStoreCertSearchNext(hStore, &Search)) != NULL)
{
const char *pszMarker;
switch (pCertCtx->fFlags & RTCRCERTCTX_F_ENC_MASK)
{
case RTCRCERTCTX_F_ENC_X509_DER: pszMarker = "CERTIFICATE"; break;
case RTCRCERTCTX_F_ENC_TAF_DER: pszMarker = "TRUST ANCHOR"; break;
default: pszMarker = NULL; break;
}
if (pszMarker && pCertCtx->cbEncoded > 0)
{
/*
* Do the base64 conversion first.
*/
size_t cchEncoded = RTBase64EncodedLength(pCertCtx->cbEncoded);
if (cchEncoded < cbBase64)
{ /* likely */ }
else
{
size_t cbNew = RT_ALIGN(cchEncoded + 64, 128);
void *pvNew = RTMemRealloc(pszBase64, cbNew);
if (!pvNew)
{
rc = VERR_NO_MEMORY;
break;
}
cbBase64 = cbNew;
pszBase64 = (char *)pvNew;
}
rc = RTBase64Encode(pCertCtx->pabEncoded, pCertCtx->cbEncoded, pszBase64, cbBase64, &cchEncoded);
if (RT_FAILURE(rc))
break;
RTStrmPrintf(hStrm, "-----BEGIN %s-----\n", pszMarker);
RTStrmWrite(hStrm, pszBase64, cchEncoded);
rc = RTStrmPrintf(hStrm, "\n-----END %s-----\n", pszMarker);
if (RT_FAILURE(rc))
break;
}
RTCrCertCtxRelease(pCertCtx);
}
if (pCertCtx)
RTCrCertCtxRelease(pCertCtx);
RTMemFree(pszBase64);
/*
* Flush the output file before closing.
*/
int rc2 = RTStrmFlush(hStrm);
if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
rc = rc2;
RTStrmClearError(hStrm); /** @todo fix RTStrmClose... */
rc2 = RTStrmClose(hStrm);
if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
rc = rc2;
}
int rc2 = RTCrStoreCertSearchDestroy(hStore, &Search); AssertRC(rc2);
}
return rc;
}
RT_EXPORT_SYMBOL(RTCrStoreCertExportAsPem);
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