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/* $Id: pkix-sign.cpp $ */
/** @file
* IPRT - Crypto - Public Key Infrastructure API, Verification.
*/
/*
* 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/pkix.h>
#include <iprt/alloca.h>
#include <iprt/err.h>
#include <iprt/mem.h>
#include <iprt/string.h>
#include <iprt/crypto/digest.h>
#include <iprt/crypto/key.h>
#ifdef IPRT_WITH_OPENSSL
# include "internal/iprt-openssl.h"
# include "internal/openssl-pre.h"
# include <openssl/evp.h>
# include <openssl/rsa.h>
# include "internal/openssl-post.h"
# ifndef OPENSSL_VERSION_NUMBER
# error "Missing OPENSSL_VERSION_NUMBER!"
# endif
#endif
#if 0
RTDECL(int) RTCrPkixPubKeySignData(PCRTASN1OBJID pAlgorithm, PCRTASN1DYNTYPE pParameters, PCRTASN1BITSTRING pPrivateKey,
PCRTASN1BITSTRING pSignatureValue, const void *pvData, size_t cbData, PRTERRINFO pErrInfo)
{
/*
* Validate the digest related inputs.
*/
AssertPtrReturn(pAlgorithm, VERR_INVALID_POINTER);
AssertReturn(RTAsn1ObjId_IsPresent(pAlgorithm), VERR_INVALID_POINTER);
AssertPtrReturn(pvData, VERR_INVALID_POINTER);
AssertReturn(cbData > 0, VERR_INVALID_PARAMETER);
/*
* Digest the data and call the other API.
*/
RTCRDIGEST hDigest;
int rc = RTCrDigestCreateByObjId(&hDigest, pAlgorithm);
if (RT_SUCCESS(rcIprt))
{
rc = RTCrDigestUpdate(hDigest, pvData, cbData);
if (RT_SUCCESS(rcIprt))
rc = RTCrPkixPubKeySignDigest(pAlgorithm, pParameters, pPrivateKey, pvSignedDigest, cbSignedDigest, hDigest, pErrInfo);
else
RTErrInfoSet(pErrInfo, rcIprt, "RTCrDigestUpdate failed");
RTCrDigestRelease(hDigest);
}
else
RTErrInfoSetF(pErrInfo, rcIprt, "Unknown digest algorithm [IPRT]: %s", pAlgorithm->szObjId);
return rc;
}
#endif
RTDECL(int) RTCrPkixPubKeySignDigest(PCRTASN1OBJID pAlgorithm, RTCRKEY hPrivateKey, PCRTASN1DYNTYPE pParameters,
RTCRDIGEST hDigest, uint32_t fFlags,
void *pvSignature, size_t *pcbSignature, PRTERRINFO pErrInfo)
{
/*
* Valid input.
*/
AssertPtrReturn(pAlgorithm, VERR_INVALID_POINTER);
AssertReturn(RTAsn1ObjId_IsPresent(pAlgorithm), VERR_INVALID_POINTER);
if (pParameters)
{
AssertPtrReturn(pParameters, VERR_INVALID_POINTER);
if (pParameters->enmType == RTASN1TYPE_NULL)
pParameters = NULL;
}
AssertPtrReturn(hPrivateKey, VERR_INVALID_POINTER);
Assert(RTCrKeyHasPrivatePart(hPrivateKey));
AssertPtrReturn(pcbSignature, VERR_INVALID_PARAMETER);
size_t cbSignature = *pcbSignature;
if (cbSignature)
AssertPtrReturn(pvSignature, VERR_INVALID_POINTER);
else
pvSignature = NULL;
AssertPtrReturn(hDigest, VERR_INVALID_HANDLE);
AssertReturn(fFlags == 0, VERR_INVALID_FLAGS);
/*
* Parameters are not currently supported (openssl code path).
*/
if (pParameters)
return RTErrInfoSet(pErrInfo, VERR_CR_PKIX_CIPHER_ALGO_PARAMS_NOT_IMPL,
"Cipher algorithm parameters are not yet supported.");
/*
* Sign using IPRT.
*/
RTCRPKIXSIGNATURE hSignature;
int rcIprt = RTCrPkixSignatureCreateByObjId(&hSignature, pAlgorithm, hPrivateKey, pParameters, true /*fSigning*/);
if (RT_FAILURE(rcIprt))
return RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_CIPHER_ALGO_NOT_KNOWN,
"Unknown private key algorithm [IPRT %Rrc]: %s", rcIprt, pAlgorithm->szObjId);
rcIprt = RTCrPkixSignatureSign(hSignature, hDigest, pvSignature, pcbSignature);
if (RT_FAILURE(rcIprt))
RTErrInfoSet(pErrInfo, rcIprt, "RTCrPkixSignatureSign failed");
RTCrPkixSignatureRelease(hSignature);
/*
* Sign using OpenSSL EVP if we can.
*/
#if defined(IPRT_WITH_OPENSSL) \
&& (OPENSSL_VERSION_NUMBER > 0x10000000L) /* 0.9.8 doesn't seem to have EVP_PKEY_CTX_set_signature_md. */
/* Make sure the algorithm includes the digest and isn't just RSA, ECDSA or similar. */
const char *pszAlgObjId = RTCrX509AlgorithmIdentifier_CombineEncryptionOidAndDigestOid(pAlgorithm->szObjId,
RTCrDigestGetAlgorithmOid(hDigest));
AssertMsgStmt(pszAlgObjId, ("enc=%s hash=%s\n", pAlgorithm->szObjId, RTCrDigestGetAlgorithmOid(hDigest)),
pszAlgObjId = RTCrDigestGetAlgorithmOid(hDigest));
/* Create an EVP private key. */
EVP_PKEY *pEvpPrivateKey = NULL;
const EVP_MD *pEvpMdType = NULL;
int rcOssl = rtCrKeyToOpenSslKeyEx(hPrivateKey, false /*fNeedPublic*/, pszAlgObjId,
(void **)&pEvpPrivateKey, (const void **)&pEvpMdType, pErrInfo);
if (RT_SUCCESS(rcOssl))
{
/* Create an EVP Private key context we can use to validate the digest. */
EVP_PKEY_CTX *pEvpPKeyCtx = EVP_PKEY_CTX_new(pEvpPrivateKey, NULL);
if (pEvpPKeyCtx)
{
rcOssl = EVP_PKEY_sign_init(pEvpPKeyCtx);
if (rcOssl > 0)
{
rcOssl = EVP_PKEY_CTX_set_rsa_padding(pEvpPKeyCtx, RSA_PKCS1_PADDING);
if (rcOssl > 0)
{
rcOssl = EVP_PKEY_CTX_set_signature_md(pEvpPKeyCtx, pEvpMdType);
if (rcOssl > 0)
{
/* Allocate a signature buffer. */
unsigned char *pbOsslSignature = NULL;
void *pvOsslSignatureFree = NULL;
size_t cbOsslSignature = cbSignature;
if (cbOsslSignature > 0)
{
if (cbOsslSignature < _1K)
pbOsslSignature = (unsigned char *)alloca(cbOsslSignature);
else
{
pbOsslSignature = (unsigned char *)RTMemTmpAlloc(cbOsslSignature);
pvOsslSignatureFree = pbOsslSignature;
}
}
if (cbOsslSignature == 0 || pbOsslSignature != NULL)
{
/* Get the digest from hDigest and sign it. */
rcOssl = EVP_PKEY_sign(pEvpPKeyCtx,
pbOsslSignature,
&cbOsslSignature,
(const unsigned char *)RTCrDigestGetHash(hDigest),
RTCrDigestGetHashSize(hDigest));
if (rcOssl > 0)
{
/* Compare the result. The memcmp assums no random padding bits. */
rcOssl = VINF_SUCCESS;
AssertMsgStmt(cbOsslSignature == *pcbSignature,
("cbOsslSignature=%#x, iprt %#x\n", cbOsslSignature, *pcbSignature),
rcOssl = VERR_CR_PKIX_OSSL_VS_IPRT_SIGNATURE_SIZE);
AssertMsgStmt( pbOsslSignature == NULL
|| rcOssl != VINF_SUCCESS
|| memcmp(pbOsslSignature, pvSignature, cbOsslSignature) == 0,
("OpenSSL: %.*Rhxs\n"
"IPRT: %.*Rhxs\n",
cbOsslSignature, pbOsslSignature, *pcbSignature, pvSignature),
rcOssl = VERR_CR_PKIX_OSSL_VS_IPRT_SIGNATURE);
if (!pbOsslSignature && rcOssl == VINF_SUCCESS)
rcOssl = VERR_BUFFER_OVERFLOW;
}
else
rcOssl = RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_SIGN_FINAL_FAILED,
"EVP_PKEY_sign failed (%d)", rcOssl);
if (pvOsslSignatureFree)
RTMemTmpFree(pvOsslSignatureFree);
}
else
rcOssl = VERR_NO_TMP_MEMORY;
}
else
rcOssl = RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_EVP_PKEY_TYPE_ERROR,
"EVP_PKEY_CTX_set_signature_md failed (%d)", rcOssl);
}
else
rcOssl = RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_EVP_PKEY_RSA_PAD_ERROR,
"EVP_PKEY_CTX_set_rsa_padding failed (%d)", rcOssl);
}
else
rcOssl = RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_EVP_PKEY_TYPE_ERROR,
"EVP_PKEY_verify_init failed (%d)", rcOssl);
EVP_PKEY_CTX_free(pEvpPKeyCtx);
}
else
rcOssl = RTErrInfoSet(pErrInfo, VERR_CR_PKIX_OSSL_EVP_PKEY_TYPE_ERROR, "EVP_PKEY_CTX_new failed");
EVP_PKEY_free(pEvpPrivateKey);
}
/*
* Check the result.
*/
if ( (RT_SUCCESS(rcIprt) && RT_SUCCESS(rcOssl))
|| (RT_FAILURE_NP(rcIprt) && RT_FAILURE_NP(rcOssl))
|| (RT_SUCCESS(rcIprt) && rcOssl == VERR_CR_PKIX_OSSL_CIPHER_ALGO_NOT_KNOWN_EVP) )
return rcIprt;
AssertMsgFailed(("rcIprt=%Rrc rcOssl=%Rrc\n", rcIprt, rcOssl));
if (RT_FAILURE_NP(rcOssl))
return rcOssl;
#endif /* IPRT_WITH_OPENSSL */
return rcIprt;
}
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