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|
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <wincrypt.h>
#define buf_size 2048
void ErrorExit(LPTSTR lpszFunction)
{
// Retrieve the system error message for the last-error code
LPVOID lpMsgBuf;
LPVOID lpDisplayBuf;
DWORD dw = GetLastError();
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0, NULL );
// Display the error message and exit the process
lpDisplayBuf = (LPVOID)LocalAlloc(LMEM_ZEROINIT,
(lstrlen((LPCTSTR)lpMsgBuf) + lstrlen((LPCTSTR)lpszFunction) + 40) * sizeof(TCHAR));
printf("%s failed with error %d: %s", lpszFunction, dw, lpMsgBuf);
MessageBox(NULL, (LPCTSTR)lpDisplayBuf, TEXT("Error"), MB_OK);
LocalFree(lpMsgBuf);
LocalFree(lpDisplayBuf);
ExitProcess(dw);
system("PAUSE");
}
int main(int argc, char *argv[])
{
printf("depart");
char * texte[buf_size+1];
char * texte2[buf_size+1];
FILE* fd;
int i=0;
char value;
char * buffer[buf_size+1];
if( (fd=fopen("C:\\Dev-Cpp\\projects\\decriptage\\1009369384.stream","rb")) == NULL )
{
perror("opening failed");
exit(0);
}
memset(buffer,0,2048);
memset(texte,0,2048);
memset(texte2,0,2048);
system("PAUSE");
while( fread(&texte,1,1*sizeof(char) ,fd)== 1 ){
//printf("%d::::\n%s",strlen(texte),texte);
strcat(texte2,texte);
}
//fread(texte,1,512,fd);
strcat(texte2,texte);
printf("::::%d::::\n%s\nfin fichier crypté.\n\n",strlen(texte2),texte2);
//SHA1 hash of email adress generated by opensll
char * cle="f68a5449e6e97b912418787f8152c5e125a8c170";
HCRYPTPROV hProv = 0;
HCRYPTHASH hHash = 0;
HCRYPTKEY hKey = 0;
DWORD Len_txt = (DWORD)strlen(texte);
DWORD Len_txt2 = (DWORD)strlen(texte2);
DWORD Len_cle = (DWORD)strlen(cle);
DWORD ret;
if ( !CryptAcquireContext (&hProv, NULL, NULL, PROV_RSA_AES, 0) )
{
ret = GetLastError();
if (ret != NTE_BAD_KEYSET)
{
perror("1" );
}
else
{
if ( !CryptAcquireContext (&hProv, NULL, NULL, PROV_RSA_AES, CRYPT_NEWKEYSET) )
{
perror("2" );
}
}
}
if ( !CryptCreateHash (hProv, CALG_SHA1, 0, 0, &hHash) )
{
if (hProv) CryptReleaseContext(hProv, 0);
perror("3" );
}
if ( !CryptHashData (hHash, (PBYTE)cle, Len_cle, 0) )
{
if (hHash) CryptDestroyHash(hHash);
if (hProv) CryptReleaseContext(hProv, 0);
perror("4" );
}
if ( !CryptDeriveKey (hProv, CALG_AES_128, hHash, 0, &hKey) )
{
if (hHash) CryptDestroyHash(hHash);
if (hProv) CryptReleaseContext(hProv, 0);
perror( "5" );
ret = GetLastError();
printf("%s", ret);
}
if ( !CryptDecrypt(hKey, 0, 0, 0, texte2, &Len_txt2) )
{
if (hKey) CryptDestroyKey(hKey);
if (hHash) CryptDestroyHash(hHash);
if (hProv) CryptReleaseContext(hProv, 0);
system("PAUSE");
ret = GetLastError();
printf("%s", ret);
ErrorExit(TEXT("CryptDecrypt"));
system("PAUSE");
}
printf("::::%d::::\n%s\nEnd of decrypted file.\n\n",strlen(texte2),texte2);
if (hKey)
CryptDestroyKey(hKey);
if (hHash)
CryptDestroyHash(hHash);
if (hProv)
CryptReleaseContext(hProv, 0);
system("PAUSE");
return 0;
} |
