我正在尝试使用 AS3 (air) 登录 RDP。考虑到缺乏了解实际过程的资源,我做得很好。
我已经通过了初始发送用户名,收到了来自服务器的响应,我现在处于初始请求连接状态。
我正在发送我的所有数据,当嗅探流量时,我看到 netmon 正在正确识别我正在发送的数据包类型 (t125)。我没有被 RDP 断开连接,他们发送了一个 ack
数据包 - 但我没有收到我期望的响应。
我一直在交叉引用 connectoid
,它是一个开源 RDP 客户端。在连接代码中,我被困在他们混合编写小端和大端整数的地方。
当我查看有限的示例(更像是数据包转储)时,我看到此进程的连接长度是 412,但我的 bytearray
更像是 470。
我已将 connectoid
方法转换为我认为正确的方法,但是混合了字节序类型,我仍然不确定。
如果这是乱码,我很抱歉,但我正在尽力帮助您帮助我。我将附上一些代码,显示我在转换中尝试做的事情。
public function sendMcsData(): void {
trace("Secure.sendMcsData");
var num_channels: int = 2;
//RdpPacket_Localised dataBuffer = new RdpPacket_Localised(512);
var hostlen: int = 2 * "myhostaddress.ath.cx".length;
if (hostlen > 30) {
hostlen = 30;
}
var length: int = 158;
length += 76 + 12 + 4;
length += num_channels * 12 + 8;
dataBuffer.writeShort(5); /* unknown */
dataBuffer.writeShort(0x14);
dataBuffer.writeByte(0x7c); //set 8 is write byte //write short is setbigendian 16 //
dataBuffer.writeShort(1);
dataBuffer.writeShort(length | 0x8000); // remaining length
dataBuffer.writeShort(8); // length?
dataBuffer.writeShort(16);
dataBuffer.writeByte(0);
var b1: ByteArray = new ByteArray();
b1.endian = Endian.LITTLE_ENDIAN;
b1.writeShort(0xc001);
dataBuffer.writeBytes(b1);
dataBuffer.writeByte(0);
var b2: ByteArray = new ByteArray();
b2.endian = Endian.LITTLE_ENDIAN;
b2.writeInt(0x61637544);
dataBuffer.writeBytes(b2);
//dataBuffer.setLittleEndian32(0x61637544); // "Duca" ?!
dataBuffer.writeShort(length - 14 | 0x8000); // remaining length
var b3: ByteArray = new ByteArray();
b3.endian = Endian.LITTLE_ENDIAN;
// Client information
b3.writeShort(SEC_TAG_CLI_INFO);
b3.writeShort(true ? 212 : 136); // length
b3.writeShort(true ? 4 : 1);
b3.writeShort(8);
b3.writeShort(600);
b3.writeShort(1024);
b3.writeShort(0xca01);
b3.writeShort(0xaa03);
b3.writeInt(0x809); //should be option.keybaortd layout just guessed 1
b3.writeInt(true ? 2600 : 419); // or 0ece
dataBuffer.writeBytes(b3);
// // client
// build? we
// are 2600
// compatible
// :-)
/* Unicode name of client, padded to 32 bytes */
dataBuffer.writeMultiByte("myhost.ath.cx".toLocaleUpperCase(), "ISO");
dataBuffer.position = dataBuffer.position + (30 - "myhost.ath.cx".toLocaleUpperCase()
.length);
var b4: ByteArray = new ByteArray();
b4.endian = Endian.LITTLE_ENDIAN;
b4.writeInt(4);
b4.writeInt(0);
b4.writeInt(12);
dataBuffer.writeBytes(b4);
dataBuffer.position = dataBuffer.position + 64; /* reserved? 4 + 12 doublewords */
var b5: ByteArray = new ByteArray();
b5.endian = Endian.LITTLE_ENDIAN;
b5.writeShort(0xca01); // out_uint16_le(s, 0xca01);
b5.writeShort(true ? 1 : 0);
if (true) //Options.use_rdp5)
{
b5.writeInt(0); // out_uint32(s, 0);
b5.writeByte(24); // out_uint8(s, g_server_bpp);
b5.writeShort(0x0700); // out_uint16_le(s, 0x0700);
b5.writeByte(0); // out_uint8(s, 0);
b5.writeInt(1); // out_uint32_le(s, 1);
b5.position = b5.position + 64;
b5.writeShort(SEC_TAG_CLI_4); // out_uint16_le(s,
// SEC_TAG_CLI_4);
b5.writeShort(12); // out_uint16_le(s, 12);
b5.writeInt(false ? 0xb : 0xd); // out_uint32_le(s,
// g_console_session
// ?
// 0xb
// :
// 9);
b5.writeInt(0); // out_uint32(s, 0);
}
// Client encryption settings //
b5.writeShort(SEC_TAG_CLI_CRYPT);
b5.writeShort(true ? 12 : 8); // length
// if(Options.use_rdp5) dataBuffer.setLittleEndian32(Options.encryption ?
// 0x1b : 0); // 128-bit encryption supported
// else
b5.writeInt(true ? (false ? 0xb : 0x3) : 0);
if (true) b5.writeInt(0); // unknown
if (true && (num_channels > 0)) {
trace(("num_channels is " + num_channels));
b5.writeShort(SEC_TAG_CLI_CHANNELS); // out_uint16_le(s,
// SEC_TAG_CLI_CHANNELS);
b5.writeShort(num_channels * 12 + 8); // out_uint16_le(s,
// g_num_channels
// * 12
// + 8);
// //
// length
b5.writeInt(num_channels); // out_uint32_le(s,
// g_num_channels);
// // number of
// virtual
// channels
dataBuffer.writeBytes(b5);
trace("b5 is bigendin" + (b5.endian == Endian.BIG_ENDIAN));
for (var i: int = 0; i < num_channels; i++) {
dataBuffer.writeMultiByte("testtes" + i, "ascii"); //, 8); // out_uint8a(s,
// g_channels[i].name,
// 8);
dataBuffer.writeInt(0x40000000); // out_uint32_be(s,
// g_channels[i].flags);
}
}
//socket.
//buffer.markEnd();
//return buffer;
}
显然,缓冲区的大部分是小端序,但其开头的几个字节预计是 16 位(短)的大端序数。这意味着,您必须以小端写入数据,就好像它会被解释为大端一样。为了将数据从大端转换为小端,您可以使用将其端设置为大端的临时 ByteArray
,将数据写入其中,然后在主缓冲区数组上调用 writeBytes()
,然后清除临时大端字节序数组。写入常量可以手动完成,因为你可以自己改变字节顺序,比如当你用大端写 0x0005
时,你只需将 0x0500
写成小端。您似乎用字节序很大的无关 dataBuffer
编写了代码,所以您知道这种技术。不过,最好只在函数中生成一个适当的 dataBuffer
。我正在尝试根据我下载的 connectoid
代码修复您的代码,以便它将返回一个格式正确且字节序很小的 ByteArray
- 这仅在您从中读取有序数据时才重要,而不是当您读取字节时。
public function sendMcsData(): ByteArray {
trace("Secure.sendMcsData");
var num_channels: int = 2;
var dataBuffer:ByteArray=new ByteArray(); //RdpPacket_Localised dataBuffer = new RdpPacket_Localised(512);
// it's better to build the data buffer in the function, as in java, otherwise you can receive interference
dataBuffer.endian=Endian.LITTLE_ENDIAN; // for clarity
var hostlen: int = 2 * "myhost.ath.cx".length; // hardcoded? TODO FIX
if (hostlen > 30) {
hostlen = 30;
}
var length: int = 158;
length += 76 + 12 + 4; // Options.use_rdp5 is true, apparently
length += num_channels * 12 + 8;
dataBuffer.writeShort(0x0500); // writing big-endian 0x5 *unknown*
dataBuffer.writeShort(0x1400); // writing big-endian 0x14
dataBuffer.writeByte(0x7c); //set 8 is write byte
//write short is setbigendian 16 //
dataBuffer.writeShort(0x0100); // writing big-endian 0x01
var be:ByteArray=new ByteArray();
be.endian=Endian.BIG_ENDIAN; // create big-endian array for the data that's not static
be.writeShort(length | 0x8000); // remaining length
dataBuffer.writeBytes(be);
be.clear(); // so that extra writing will not spoil the array
dataBuffer.writeShort(0x0800); // writing big-endian 0x08 (length?)
dataBuffer.writeShort(0x1000); // writing big-endian 16 (0x10)
dataBuffer.writeByte(0);
dataBuffer.writeShort(0xc001); // this one is little endian by default
dataBuffer.writeByte(0);
dataBuffer.writeUnsignedInt(0x61637544);
//dataBuffer.setLittleEndian32(0x61637544); // "Duca" ?!
be.writeShort((length - 14) | 0x8000); // remaining length
dataBuffer.writeBytes(be);
be.clear();
dataBuffer.writeShort(SEC_TAG_CLI_INFO);
dataBuffer.writeShort(212); // length
dataBuffer.writeShort(4);
dataBuffer.writeShort(8);
dataBuffer.writeShort(600); // Options.width
dataBuffer.writeShort(1024); // Options.height
dataBuffer.writeShort(0xca01);
dataBuffer.writeShort(0xaa03);
dataBuffer.writeInt(0x0409); //Options.keylayout, default English/US - fixed
dataBuffer.writeInt(2600); // or 0ece
dataBuffer.writeBytes(b3);
// // client
// build? we
// are 2600
// compatible
// :-)
/* Unicode name of client, padded to 32 bytes */
var targetPos:int=dataBuffer.position+32; // to account for padding
dataBuffer.writeMultiByte("myhost.ath.cx".toLocaleUpperCase(), "UTF-16");
// buffer.outUnicodeString(Options.hostname.toUpperCase(), hostlen);
// apparently encoding is used "Unicode" that is UTF-16. If that will not work, set UTF-8 here
// and by all means check what is on the wire when you connect via conventional RDP
dataBuffer.position = targetPos;
// this seems to be your mistake in converting position truncate,
// as position after writing already accounts for the writing been processed.
// This line alone can be the source of size discrepancy you observe.
dataBuffer.writeInt(4);
dataBuffer.writeInt(0);
dataBuffer.writeInt(12);
dataBuffer.position = dataBuffer.position + 64; // /* reserved? 4 + 12 doublewords */
// note, if the position wouldn't shift forward, write zeroes manually
dataBuffer.writeShort(0xca01); // out_uint16_le(s, 0xca01);
dataBuffer.writeShort(1);
if (true) //Options.use_rdp5)
{
dataBuffer.writeInt(0); // out_uint32(s, 0);
dataBuffer.writeByte(24); // out_uint8(s, g_server_bpp);
dataBuffer.writeShort(0x0700); // out_uint16_le(s, 0x0700);
dataBuffer.writeByte(0); // out_uint8(s, 0);
dataBuffer.writeInt(1); // out_uint32_le(s, 1);
dataBuffer.position = dataBuffer.position + 64;
dataBuffer.writeShort(SEC_TAG_CLI_4); // out_uint16_le(s,
// SEC_TAG_CLI_4);
dataBuffer.writeShort(12); // out_uint16_le(s, 12);
dataBuffer.writeInt(0xd); // out_uint32_le(s,
// g_console_session
// ?
// 0xb
// :
// 9);
// the comments say 9, but the code says 0xd - leaving 0xd in place
// Options.console_session is hardcoded false
dataBuffer.writeInt(0); // out_uint32(s, 0);
}
// Client encryption settings //
dataBuffer.writeShort(SEC_TAG_CLI_CRYPT);
dataBuffer.writeShort(12); // length
// if(Options.use_rdp5) dataBuffer.setLittleEndian32(Options.encryption ?
// 0x1b : 0); // 128-bit encryption supported
// else
dataBuffer.writeInt(true ? (false ? 0xb : 0x3) : 0);
dataBuffer.writeInt(0); // unknown
if (true && (num_channels > 0)) {
trace(("num_channels is", num_channels));
dataBuffer.writeShort(SEC_TAG_CLI_CHANNELS); // out_uint16_le(s,
// SEC_TAG_CLI_CHANNELS);
dataBuffer.writeShort(num_channels * 12 + 8); // out_uint16_le(s,
// g_num_channels
// * 12
// + 8);
// //
// length
dataBuffer.writeInt(num_channels); // out_uint32_le(s,
// g_num_channels);
// // number of
// virtual
// channels
for (var i: int = 0; i < num_channels; i++) {
targetPos=dataBuffer.position+8; // account for padding/truncation
dataBuffer.writeMultiByte("testtes" + i, "ascii"); //, 8); // out_uint8a(s,
// g_channels[i].name,
// 8);
dataBuffer.position=targetPos;
dataBuffer.writeInt(0x00000040); // out_uint32_be(s,
// g_channels[i].flags);
// writing big-endian 0x40000000
}
}
trace("sendMCSData: Data buffer length is",dataBuffer.length); // debug
return dataBuffer;
}
希望这可以帮助。