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/* $Id$ */
/** @file
* IPRT - Crypto - Public Key Infrastructure API, Verification.
*/
/*
* Copyright (C) 2006-2014 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/pkix.h>
#include <iprt/err.h>
#include <iprt/string.h>
#include <iprt/crypto/digest.h>
#ifdef IPRT_WITH_OPENSSL
# include "internal/iprt-openssl.h"
# include "openssl/evp.h"
#endif
RTDECL(int) RTCrPkixPubKeyVerifySignature(PCRTASN1OBJID pAlgorithm, PCRTASN1DYNTYPE pParameters, PCRTASN1BITSTRING pPublicKey,
PCRTASN1BITSTRING pSignatureValue, const void *pvData, size_t cbData,
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(pPublicKey, VERR_INVALID_POINTER);
AssertReturn(RTAsn1BitString_IsPresent(pPublicKey), VERR_INVALID_POINTER);
AssertPtrReturn(pSignatureValue, VERR_INVALID_POINTER);
AssertReturn(RTAsn1BitString_IsPresent(pSignatureValue), VERR_INVALID_POINTER);
AssertPtrReturn(pvData, VERR_INVALID_POINTER);
AssertReturn(cbData > 0, VERR_INVALID_PARAMETER);
/*
* 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.");
/*
* Validate using IPRT.
*/
RTCRPKIXSIGNATURE hSignature;
int rcIprt = RTCrPkixSignatureCreateByObjId(&hSignature, pAlgorithm, false /*fSigning*/, pPublicKey, pParameters);
if (RT_FAILURE(rcIprt))
return RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_CIPHER_ALGO_NOT_KNOWN,
"Unknown public key algorithm [IPRT]: %s", pAlgorithm->szObjId);
RTCRDIGEST hDigest;
rcIprt = RTCrDigestCreateByObjId(&hDigest, pAlgorithm);
if (RT_SUCCESS(rcIprt))
{
/* Calculate the digest. */
rcIprt = RTCrDigestUpdate(hDigest, pvData, cbData);
if (RT_SUCCESS(rcIprt))
{
rcIprt = RTCrPkixSignatureVerifyBitString(hSignature, hDigest, pSignatureValue);
if (RT_FAILURE(rcIprt))
RTErrInfoSet(pErrInfo, rcIprt, "RTCrPkixSignatureVerifyBitString failed");
}
else
RTErrInfoSet(pErrInfo, rcIprt, "RTCrDigestUpdate failed");
RTCrDigestRelease(hDigest);
}
else
RTErrInfoSetF(pErrInfo, rcIprt, "Unknown digest algorithm [IPRT]: %s", pAlgorithm->szObjId);
RTCrPkixSignatureRelease(hSignature);
#ifdef IPRT_WITH_OPENSSL
/*
* Validate using OpenSSL EVP.
*/
rtCrOpenSslInit();
/* Translate the algorithm ID into a EVP message digest type pointer. */
int iAlgoNid = OBJ_txt2nid(pAlgorithm->szObjId);
if (iAlgoNid == NID_undef)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_CIPHER_ALGO_NOT_KNOWN,
"Unknown public key algorithm [OpenSSL]: %s", pAlgorithm->szObjId);
const char *pszAlogSn = OBJ_nid2sn(iAlgoNid);
const EVP_MD *pEvpMdType = EVP_get_digestbyname(pszAlogSn);
if (!pEvpMdType)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_CIPHER_ALGO_NOT_KNOWN_EVP,
"EVP_get_digestbyname failed on %s (%s)", pszAlogSn, pAlgorithm->szObjId);
/* Initialize the EVP message digest context. */
EVP_MD_CTX EvpMdCtx;
EVP_MD_CTX_init(&EvpMdCtx);
if (!EVP_VerifyInit_ex(&EvpMdCtx, pEvpMdType, NULL /*engine*/))
return RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_CIPHER_ALOG_INIT_FAILED,
"EVP_VerifyInit_ex failed (algorithm type is %s / %s)", pszAlogSn, pAlgorithm->szObjId);
/* Create an EVP public key. */
int rcOssl;
EVP_PKEY *pEvpPublicKey = EVP_PKEY_new();
if (pEvpPublicKey)
{
pEvpPublicKey->type = EVP_PKEY_type(pEvpMdType->required_pkey_type[0]);
if (pEvpPublicKey->type != NID_undef)
{
const unsigned char *puchPublicKey = RTASN1BITSTRING_GET_BIT0_PTR(pPublicKey);
if (d2i_PublicKey(pEvpPublicKey->type, &pEvpPublicKey, &puchPublicKey, RTASN1BITSTRING_GET_BYTE_SIZE(pPublicKey)))
{
/* Digest the data. */
EVP_VerifyUpdate(&EvpMdCtx, pvData, cbData);
/* Verify the signature. */
if (EVP_VerifyFinal(&EvpMdCtx,
RTASN1BITSTRING_GET_BIT0_PTR(pSignatureValue),
RTASN1BITSTRING_GET_BYTE_SIZE(pSignatureValue),
pEvpPublicKey) > 0)
rcOssl = VINF_SUCCESS;
else
rcOssl = RTErrInfoSet(pErrInfo, VERR_CR_PKIX_OSSL_VERIFY_FINAL_FAILED, "EVP_VerifyFinal failed");
}
else
rcOssl = RTErrInfoSet(pErrInfo, VERR_CR_PKIX_OSSL_D2I_PUBLIC_KEY_FAILED, "d2i_PublicKey failed");
}
else
rcOssl = RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_EVP_PKEY_TYPE_ERROR,
"EVP_PKEY_type(%d) failed", pEvpMdType->required_pkey_type[0]);
/* Cleanup and return.*/
EVP_PKEY_free(pEvpPublicKey);
}
EVP_MD_CTX_cleanup(&EvpMdCtx);
/*
* Check the result.
*/
if (RT_SUCCESS(rcIprt) && RT_SUCCESS(rcOssl))
return VINF_SUCCESS;
if (RT_FAILURE_NP(rcIprt) && RT_FAILURE_NP(rcOssl))
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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