远程访问
Radare可以在本地运行,也可以作为服务器进程启动,由本地的radare2控制。这个方案之所以可行,是因为它们都使用了Radar的IO子系统,该子系统抽象了对system(),cmd()和所有基本IO操作的访问,从而使radare2可以通过网络工作。
一些与radare远程访问相关的帮助信息:
[0x00405a04]> =?
Usage: =[:!+-=ghH] [...] # connect with other instances of r2
remote commands:
| = list all open connections
| =<[fd] cmd send output of local command to remote fd
| =[fd] cmd exec cmd at remote 'fd' (last open is default one)
| =! cmd run command via r_io_system
| =+ [proto://]host:port connect to remote host:port (*rap://, raps://, tcp://, udp://, http://)
| =-[fd] remove all hosts or host 'fd'
| ==[fd] open remote session with host 'fd', 'q' to quit
| =!= disable remote cmd mode
| !=! enable remote cmd mode
servers:
| .:9000 start the tcp server (echo x|nc ::1 9090 or curl ::1:9090/cmd/x)
| =:port start the rap server (o rap://9999)
| =g[?] start the gdbserver
| =h[?] start the http webserver
| =H[?] start the http webserver (and launch the web browser)
other:
| =&:port start rap server in background (same as '&_=h')
| =:host:port cmd run 'cmd' command on remote server
examples:
| =+tcp://localhost:9090/ connect to: r2 -c.:9090 ./bin
| =+rap://localhost:9090/ connect to: r2 rap://:9090
| =+http://localhost:9090/cmd/ connect to: r2 -c'=h 9090' bin
| o rap://:9090/ start the rap server on tcp port 9090
可以通过radare2 -L
列出的IO插件了解radare2的远程访问能力。通过例子来说明可能会更好理解一些,一个典型的remote session看起来就像这样:
远程主机1(host1):
$ radare2 rap://:1234
远程主机2(host2):
$ radare2 rap://:1234
本地主机:
$ radare2 -
在本地添加远程主机:
[0x004048c5]> =+ rap://<host1>:1234//bin/ls
Connected to: <host1> at port 1234
waiting... ok
[0x004048c5]> =
0 - rap://<host1>:1234//bin/ls
可以通过在添加主机时指定URI以debug模式(或者使用其他IO插件)打开远程主机上的文件:
[0x004048c5]> =+ =+ rap://<host2>:1234/dbg:///bin/ls
Connected to: <host2> at port 1234
waiting... ok
0 - rap://<host1>:1234//bin/ls
1 - rap://<host2>:1234/dbg:///bin/ls
在host1上执行命令:
[0x004048c5]> =0 px
[0x004048c5]> = s 0x666
打开与host2的session:
[0x004048c5]> ==1
fd:6> pi 1
...
fd:6> q
移除主机 (关闭连接):
[0x004048c5]> =-
还可以将radare的输出重定向至TCP/UDP服务器(就如使用nc -l
)。首先使用=+ tcp://
或 =+ udp://
添加服务器,接着就可以用如下命令将输出重定向至该服务器:
[0x004048c5]> =+ tcp://<host>:<port>/
Connected to: <host> at port <port>
5 - tcp://<host>:<port>/
[0x004048c5]> =<5 cmd...
=<
命令会将cmd
的执行结果输出到远程连接N上(如果没有指定N,就会输出到最后一次使用的连接上)。
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