HashResult BCryptHashImpl::Calculate(Aws::IStream& stream)
{
if(!IsValid())
{
return HashResult();
}
std::lock_guard<std::mutex> locker(m_algorithmMutex);
auto startingPos = stream.tellg();
bool success = HashStream(stream);
if(success)
{
stream.clear();
}
stream.seekg(startingPos, stream.beg);
if(!success)
{
return HashResult();
}
return HashResult(ByteBuffer(m_hashBuffer, m_hashBufferLength));
}
int HashFile(const char * fname, unsigned char *hash, int bytes_to_read)
{
FILE *fp = fopen(fname, "rb");
if (fp != NULL) {
int total_read = HashStream(fp, hash, bytes_to_read);
fclose(fp);
return total_read;
} else {
return -1;
}
}