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/* ****************************************************************************
* eID Middleware Project.
* Copyright (C) 2008-2009 FedICT.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version
* 3.0 as published by the Free Software Foundation.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, see
* http://www.gnu.org/licenses/.
**************************************************************************** */
#include "BaseProvider.h"
#include "../common/Log.h"
#include "../common/eidErrors.h"
using namespace eIDMW;
CBaseProvider::CBaseProvider()
{
m_bBaseProvHandleOK = false;
}
CBaseProvider::~CBaseProvider()
{
if (m_bBaseProvHandleOK)
CryptReleaseContext(m_hBaseProv, 0);
}
BOOL CBaseProvider::ImportKey(CERT_PUBLIC_KEY_INFO *pPubKeyInfo,
DWORD dwKeySpec, OUT HCRYPTKEY *phUserKey)
{
GetBaseProviderHandle();
return CryptImportPublicKeyInfo(m_hBaseProv,
AT_KEYEXCHANGE, pPubKeyInfo, phUserKey);
}
BOOL CBaseProvider::DestroyKey(HCRYPTKEY hKey)
{
GetBaseProviderHandle();
return CryptDestroyKey(hKey);
}
BOOL CBaseProvider::GetKeyParam(HCRYPTKEY hKey, DWORD dwParam,
LPBYTE pbData, LPDWORD pcbDataLen, DWORD dwFlags)
{
GetBaseProviderHandle();
return CryptGetKeyParam(hKey, dwParam, pbData, pcbDataLen, dwFlags);
}
BOOL CBaseProvider::ExportKey(HCRYPTKEY hKey, HCRYPTKEY hPubKey, DWORD dwBlobType,
DWORD dwFlags, LPBYTE pbData, LPDWORD pcbDataLen)
{
GetBaseProviderHandle();
return CryptExportKey(hKey, hPubKey, dwBlobType, dwFlags, pbData, pcbDataLen);
}
BOOL CBaseProvider::VerifySignature(CProviderHash & oHash,
CONST BYTE *pbSignature, DWORD cbSigLen,
HCRYPTKEY hPubKey, LPCWSTR szDescription, DWORD dwFlags)
{
GetBaseProviderHandle();
CByteArray oHashValue = oHash.GetHashValue();
//printf("algid: 0x%0x, hash: %s\n", oHash.GetAlgid(), oHashValue.ToString().c_str());
//printf("sig: %s\n", CByteArray(pbSignature, cbSigLen).ToString().c_str());
HCRYPTHASH hHash;
BOOL bRet = CryptCreateHash(m_hBaseProv, oHash.GetAlgid(), NULL, 0, &hHash);
if (bRet)
{
bRet = CryptSetHashParam(hHash, HP_HASHVAL, oHashValue.GetBytes(), 0);
if (bRet)
{
bRet = CryptVerifySignature(hHash,
pbSignature, cbSigLen, hPubKey, szDescription, dwFlags);
}
CryptDestroyHash(hHash);
}
return bRet;
}
void CBaseProvider::GetBaseProviderHandle()
{
CAutoMutex oAutoMutex(&m_oBaseProvMutex);
if (!m_bBaseProvHandleOK)
{
// Get the Base CSP name
const char *csKey = "SOFTWARE\\Microsoft\\Cryptography\\Defaults\\Provider Types\\Type 001";
HKEY hKey;
LONG lRet = RegOpenKeyExA(HKEY_LOCAL_MACHINE, csKey, 0, KEY_READ, &hKey);
if (ERROR_SUCCESS != lRet)
{
MWLOG(LEV_ERROR, MOD_CSP, L" Couldn't RegOpenKeyEx(): err = 0x%0x", lRet);
throw CMWEXCEPTION(EIDMW_ERR_CHECK);
}
char csBaseProvName[200];
DWORD dwLen = sizeof(csBaseProvName);
DWORD dwType;
lRet = RegQueryValueExA(hKey, "Name", NULL, &dwType, (LPBYTE) csBaseProvName, &dwLen);
RegCloseKey(hKey);
if (ERROR_SUCCESS != lRet)
{
MWLOG(LEV_ERROR, MOD_CSP, L" Couldn't RegQueryValueEx(): err = 0x%0x", lRet);
throw CMWEXCEPTION(EIDMW_ERR_CHECK);
}
// Call CryptAcquireContext(base CSP name)
m_bBaseProvHandleOK = CryptAcquireContextA(&m_hBaseProv, NULL,
csBaseProvName, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT);
if (!m_bBaseProvHandleOK)
{
MWLOG(LEV_ERROR, MOD_CSP, L" Couldn't CryptAcquireContext(): last error = 0x%0x", GetLastError());
throw CMWEXCEPTION(EIDMW_ERR_CHECK);
}
}
}
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