MD5_state MD5_from_string(XString msg)
{
MD5_state state;
MD5_init(&state);
MD5_block block;
const uint64_t msg_full_len = msg.size();
while (msg.size() >= 64)
{
for (int i = 0; i < 0x10; i++)
X[i] = msg[4 * i + 0] | msg[4 * i + 1] << 8 | msg[4 * i + 2] << 16 | msg[4 * i + 3] << 24;
MD5_do_block(&state, block);
msg = msg.xslice_t(64);
}
// now pad 1-512 bits + the 64-bit length - may be two blocks
uint8_t buf[0x40] = {};
really_memcpy(buf, reinterpret_cast<const uint8_t *>(msg.data()), msg.size());
buf[msg.size()] = 0x80; // a single one bit
if (64 - msg.size() > 8)
{
for (int i = 0; i < 8; i++)
buf[0x38 + i] = (msg_full_len * 8) >> (i * 8);
}
for (int i = 0; i < 0x10; i++)
X[i] = buf[4 * i + 0] | buf[4 * i + 1] << 8 | buf[4 * i + 2] << 16 | buf[4 * i + 3] << 24;
MD5_do_block(&state, block);
if (64 - msg.size() <= 8)
{
really_memset0(buf, 0x38);
for (int i = 0; i < 8; i++)
buf[0x38 + i] = (msg_full_len * 8) >> (i * 8);
for (int i = 0; i < 0x10; i++)
X[i] = buf[4 * i + 0] | buf[4 * i + 1] << 8 | buf[4 * i + 2] << 16 | buf[4 * i + 3] << 24;
MD5_do_block(&state, block);
}
void WriteFile::put_line(XString xs)
{
really_put(xs.data(), xs.size());
if (!xs.endswith('\n'))
put('\n');
}
