void Client::on_packet_header(
PacketHeader* p,
system::error_code err,
size_t bytesTransferred)
{
unused_parameter(bytesTransferred); // Only used for debug builds.
assert(p);
PacketAllocator::auto_free f(packetPool, reinterpret_cast<uint8_t*>(p));
if(err)
return disconnect("Failure in recv(Header).");
assert(bytesTransferred == PacketHeader::SIZE);
if(p->version == 0x65)
{
decrypt_header(p, cryptoKey.c_array());
}
else if(p->version != 0x64)
logger->info(format("[%1%] Unknown protocol version %2% recieved.") % get_ip() % p->version);
recieve_payload(p->fullSize, p->version == 0x65);
}
static zip_int64_t
winzip_aes_decrypt(zip_source_t *src, void *ud, void *data, zip_uint64_t len, zip_source_cmd_t cmd)
{
struct winzip_aes *ctx;
zip_int64_t n;
zip_uint64_t total, offset;
ctx = (struct winzip_aes *)ud;
switch (cmd) {
case ZIP_SOURCE_OPEN:
if (decrypt_header(src, ctx) < 0) {
return -1;
}
ctx->current_position = 0;
return 0;
case ZIP_SOURCE_READ:
if (len > ctx->data_length - ctx->current_position) {
len = ctx->data_length - ctx->current_position;
}
if (len == 0) {
if (!verify_hmac(src, ctx)) {
return -1;
}
return 0;
}
if ((n=zip_source_read(src, data, len)) < 0) {
_zip_error_set_from_source(&ctx->error, src);
return -1;
}
ctx->current_position += n;
total = (zip_uint64_t)n;
for (offset = 0; offset < total; offset += ZIP_MIN(total - offset, UINT_MAX)) {
_zip_fcrypt_decrypt(data + offset, ZIP_MIN(total - offset, UINT_MAX), &ctx->fcrypt_ctx);
}
return n;
case ZIP_SOURCE_CLOSE:
return 0;
case ZIP_SOURCE_STAT:
{
zip_stat_t *st;
st = (zip_stat_t *)data;
st->encryption_method = ZIP_EM_NONE;
st->valid |= ZIP_STAT_ENCRYPTION_METHOD;
if (st->valid & ZIP_STAT_COMP_SIZE) {
st->comp_size -= 12 + salt_length[ctx->mode];
}
return 0;
}
case ZIP_SOURCE_SUPPORTS:
return zip_source_make_command_bitmap(ZIP_SOURCE_OPEN, ZIP_SOURCE_READ, ZIP_SOURCE_CLOSE, ZIP_SOURCE_STAT, ZIP_SOURCE_ERROR, ZIP_SOURCE_FREE, -1);
case ZIP_SOURCE_ERROR:
return zip_error_to_data(&ctx->error, data, len);
case ZIP_SOURCE_FREE:
winzip_aes_free(ctx);
return 0;
default:
zip_error_set(&ctx->error, ZIP_ER_INVAL, 0);
return -1;
}
}