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/* Benjamin DELPY `gentilkiwi`
http://blog.gentilkiwi.com
benjamin@gentilkiwi.com
Licence : http://creativecommons.org/licenses/by/3.0/fr/
*/
#include "mod_crypto.h"
bool mod_crypto::getSystemStoreFromString(wstring strSystemStore, DWORD * systemStore)
{
map<wstring, DWORD> mesEmplacements;
mesEmplacements.insert(make_pair(L"CERT_SYSTEM_STORE_CURRENT_USER", CERT_SYSTEM_STORE_CURRENT_USER));
mesEmplacements.insert(make_pair(L"CERT_SYSTEM_STORE_CURRENT_USER_GROUP_POLICY", CERT_SYSTEM_STORE_CURRENT_USER_GROUP_POLICY));
mesEmplacements.insert(make_pair(L"CERT_SYSTEM_STORE_LOCAL_MACHINE", CERT_SYSTEM_STORE_LOCAL_MACHINE));
mesEmplacements.insert(make_pair(L"CERT_SYSTEM_STORE_LOCAL_MACHINE_GROUP_POLICY", CERT_SYSTEM_STORE_LOCAL_MACHINE_GROUP_POLICY));
mesEmplacements.insert(make_pair(L"CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE", CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE));
mesEmplacements.insert(make_pair(L"CERT_SYSTEM_STORE_CURRENT_SERVICE", CERT_SYSTEM_STORE_CURRENT_SERVICE));
mesEmplacements.insert(make_pair(L"CERT_SYSTEM_STORE_USERS", CERT_SYSTEM_STORE_USERS));
mesEmplacements.insert(make_pair(L"CERT_SYSTEM_STORE_SERVICES", CERT_SYSTEM_STORE_SERVICES));
map<wstring, DWORD>::iterator monIterateur = mesEmplacements.find(strSystemStore);
if(monIterateur != mesEmplacements.end())
{
*systemStore = monIterateur->second;
return true;
}
else return false;
}
BOOL WINAPI mod_crypto::enumSysCallback(const void *pvSystemStore, DWORD dwFlags, PCERT_SYSTEM_STORE_INFO pStoreInfo, void *pvReserved, void *pvArg)
{
reinterpret_cast<vector<wstring> *>(pvArg)->push_back(reinterpret_cast<const wchar_t *>(pvSystemStore));
return TRUE;
}
bool mod_crypto::getVectorSystemStores(vector<wstring> * maSystemStoresvector, DWORD systemStore)
{
return (CertEnumSystemStore(systemStore, NULL, maSystemStoresvector, enumSysCallback) != 0);
}
bool mod_crypto::getCertNameFromCertCTX(PCCERT_CONTEXT certCTX, wstring * certName)
{
bool reussite = false;
wchar_t * monBuffer = NULL;
DWORD maRecherche[] = {CERT_NAME_FRIENDLY_DISPLAY_TYPE, CERT_NAME_DNS_TYPE, CERT_NAME_EMAIL_TYPE, CERT_NAME_UPN_TYPE, CERT_NAME_URL_TYPE};
for(DWORD i = 0; !reussite && (i < (sizeof(maRecherche) / sizeof(DWORD))); i++)
{
DWORD tailleRequise = CertGetNameString(certCTX, maRecherche[i], 0, NULL, NULL, 0);
if(tailleRequise > 1)
{
monBuffer = new wchar_t[tailleRequise];
reussite = CertGetNameString(certCTX, maRecherche[i], 0, NULL, monBuffer, tailleRequise) > 1;
certName->assign(monBuffer);
delete[] monBuffer;
}
}
return reussite;
}
bool mod_crypto::getKiwiKeyProvInfo(PCCERT_CONTEXT certCTX, KIWI_KEY_PROV_INFO * keyProvInfo)
{
bool reussite = false;
DWORD taille = 0;
if(CertGetCertificateContextProperty(certCTX, CERT_KEY_PROV_INFO_PROP_ID, NULL, &taille))
{
BYTE * monBuffer = new BYTE[taille];
if(reussite = (CertGetCertificateContextProperty(certCTX, CERT_KEY_PROV_INFO_PROP_ID, monBuffer, &taille) != 0))
{
CRYPT_KEY_PROV_INFO * mesInfos = reinterpret_cast<CRYPT_KEY_PROV_INFO *>(monBuffer);
keyProvInfo->pwszProvName.assign(mesInfos->pwszProvName ? mesInfos->pwszProvName : L"(null)");
keyProvInfo->pwszContainerName.assign(mesInfos->pwszContainerName ? mesInfos->pwszContainerName : L"(null)");
keyProvInfo->cProvParam = mesInfos->cProvParam;
keyProvInfo->dwFlags = mesInfos->dwFlags;
keyProvInfo->dwKeySpec = mesInfos->dwKeySpec;
keyProvInfo->dwProvType = mesInfos->dwProvType;
}
delete[] monBuffer;
}
return reussite;
}
bool mod_crypto::CertCTXtoPFX(PCCERT_CONTEXT certCTX, wstring pfxFile, wstring password)
{
bool retour = false;
HCERTSTORE hTempStore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, NULL, CERT_STORE_CREATE_NEW_FLAG, NULL);
PCCERT_CONTEXT pCertContextCopy = NULL;
if(CertAddCertificateContextToStore(hTempStore, certCTX, CERT_STORE_ADD_NEW, &pCertContextCopy))
{
CRYPT_DATA_BLOB bDataBlob = {0, NULL};
if(PFXExportCertStoreEx(hTempStore, &bDataBlob, password.c_str(), NULL, EXPORT_PRIVATE_KEYS | REPORT_NOT_ABLE_TO_EXPORT_PRIVATE_KEY))
{
bDataBlob.pbData = new BYTE[bDataBlob.cbData];
if(PFXExportCertStoreEx(hTempStore, &bDataBlob, password.c_str(), NULL, EXPORT_PRIVATE_KEYS | REPORT_NOT_ABLE_TO_EXPORT_PRIVATE_KEY))
{
HANDLE hFile = CreateFile(pfxFile.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL);
if(hFile && hFile != INVALID_HANDLE_VALUE)
{
DWORD dwBytesWritten;
if(WriteFile(hFile, bDataBlob.pbData, bDataBlob.cbData, &dwBytesWritten, NULL) && (bDataBlob.cbData == dwBytesWritten))
{
retour = FlushFileBuffers(hFile) != 0;
}
CloseHandle(hFile);
}
}
delete[] bDataBlob.pbData;
}
CertFreeCertificateContext(pCertContextCopy);
}
CertCloseStore(hTempStore, CERT_CLOSE_STORE_FORCE_FLAG);
return retour;
}
bool mod_crypto::CertCTXtoDER(PCCERT_CONTEXT certCTX, wstring DERFile)
{
bool retour = false;
HANDLE hFile = CreateFile(DERFile.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL);
if(hFile && hFile != INVALID_HANDLE_VALUE)
{
DWORD dwBytesWritten;
if(WriteFile(hFile, certCTX->pbCertEncoded, certCTX->cbCertEncoded, &dwBytesWritten, NULL) && certCTX->cbCertEncoded == dwBytesWritten)
{
retour = FlushFileBuffers(hFile) != 0;
}
CloseHandle(hFile);
}
return retour;
}
wstring mod_crypto::KeyTypeToString(DWORD keyType)
{
wostringstream keyTypeStr;
switch (keyType)
{
case AT_KEYEXCHANGE:
keyTypeStr << L"AT_KEYEXCHANGE";
break;
case AT_SIGNATURE:
keyTypeStr << L"AT_SIGNATURE";
break;
default:
keyTypeStr << L"? (" << hex << keyType << L")";
}
return keyTypeStr.str();
}
bool mod_crypto::PrivateKeyBlobToPVK(BYTE * monExport, DWORD tailleExport, wstring pvkFile, DWORD keySpec)
{
bool retour = false;
FILE_HDR monHeader = {PVK_MAGIC, PVK_FILE_VERSION_0, keySpec, PVK_NO_ENCRYPT, 0, tailleExport};
HANDLE hFile = CreateFile(pvkFile.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL);
if(hFile && hFile != INVALID_HANDLE_VALUE)
{
DWORD dwBytesWritten;
if(WriteFile(hFile, &monHeader, sizeof(monHeader), &dwBytesWritten, NULL) && (sizeof(monHeader) == dwBytesWritten))
{
if(WriteFile(hFile, monExport, tailleExport, &dwBytesWritten, NULL) && (tailleExport == dwBytesWritten))
{
retour = FlushFileBuffers(hFile) != 0;
}
}
CloseHandle(hFile);
}
return retour;
}
bool mod_crypto::genericDecrypt(BYTE * data, SIZE_T dataSize, const BYTE * key, SIZE_T keySize, ALG_ID algorithme, BYTE * destBuffer, SIZE_T destBufferSize)
{
bool retour = false;
HCRYPTPROV hCryptProv = NULL;
HCRYPTKEY hKey = NULL;
PBYTE buffer = data;
DWORD dwWorkingBufferLength = dataSize;
if(destBuffer && destBufferSize >= dataSize)
{
RtlCopyMemory(destBuffer, data, dataSize);
buffer = destBuffer;
}
if((algorithme == CALG_RC4) && (keySize > 16))
{
fullRC4(buffer, dataSize, key, keySize);
retour = true;
}
else
{
if(CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
{
GENERICKEY_BLOB myKeyHead = {{PLAINTEXTKEYBLOB, CUR_BLOB_VERSION, 0, algorithme}, keySize};
BYTE * myKey = new BYTE[sizeof(GENERICKEY_BLOB) + keySize];
RtlCopyMemory(myKey, &myKeyHead, sizeof(GENERICKEY_BLOB));
RtlCopyMemory(myKey + sizeof(GENERICKEY_BLOB), key, keySize);
if(CryptImportKey(hCryptProv, myKey, sizeof(GENERICKEY_BLOB) + keySize, 0, CRYPT_EXPORTABLE, &hKey))
{
if(CryptDecrypt(hKey, NULL, TRUE, 0, buffer, &dwWorkingBufferLength) || ((algorithme == CALG_DES) && (GetLastError() == NTE_BAD_DATA))) // évite les erreurs de parités http://support.microsoft.com/kb/331367/
retour = (dwWorkingBufferLength == dataSize);
CryptDestroyKey(hKey);
}
delete[] myKey;
CryptReleaseContext(hCryptProv, 0);
}
}
return retour;
}
void mod_crypto::fullRC4(BYTE * data, SIZE_T data_len, const BYTE * key, SIZE_T keylen) // pour les clés >= 128 bits (16 octets)
{
ULONG i, j, k = 0, kpos = 0;
BYTE S[256], *pos = data;
for (i = 0; i < 256; i++)
S[i] = static_cast<BYTE>(i);
for (i = 0, j = 0; i < 256; i++)
{
j = (j + S[i] + key[kpos]) & 0xff;
kpos++;
if (kpos >= keylen)
kpos = 0;
S_SWAP(i, j);
}
for (i = 0, j = 0; k < data_len; k++)
{
i = (i + 1) & 0xff;
j = (j + S[i]) & 0xff;
S_SWAP(i, j);
*pos++ ^= S[(S[i] + S[j]) & 0xff];
}
}
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