我是一名Android开发人员，我们正在尝试在Android设备和Linux主机之间建立ssh隧道。我为此解决方案使用dropbear。
这是我的步骤:
1)我正在通过具有0端口的dbclient连接到我的主机
dbclient -i "$RSA_KEY" -f -N -R 0:localhost:22 "$HOST" -y &> /sdcard/out
2)然后我正在运行dropbear
dropbear -E -R
3)现在，我可以使用公钥和/ sdcard / out中的端口通过主机通过ssh连接到设备
ssh -i ssh_rsa_key root@localhost -p 50216
就是这里，而且效果很好。
对于我的解决方案，我需要自动进行隧道传输。
我已经在/ system / bin /下创建了bash脚本(使用脚本构建android镜像)。在init.rc中添加了相应的服务以自动运行我的脚本。
service myScript /system/bin/myScript
class core
user root
group root
disabled
该脚本实际上每5秒钟由系统运行一次。但是当我尝试连接设备时，收到以下错误消息:
Aiee, segfault! You should probably report this as a bug to the developer
最奇怪的是，当我手动运行脚本时，它可以正常运行，但是当系统运行相同的脚本时，我收到上面描述的错误消息。
“dmesg”，“logcat”，甚至“ssh ... -vvv”都不会给出任何错误消息。
我认为问题出在“dropbear”本身，因为当系统运行“dbclient”然后手动运行“dropbear -E -R”时，隧道可以正常工作。
这是我的“ssh ... -v”输出
OpenSSH_7.6p1, LibreSSL 2.6.2
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 48: Applying options for *
debug1: Connecting to localhost port 50643.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file ssh_rsa_key_to_box type -1
debug1: key_load_public: No such file or directory
debug1: identity file ssh_rsa_key_to_box-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6
debug1: Remote protocol version 2.0, remote software version dropbear_2017.75
debug1: no match: dropbear_2017.75
debug1: Authenticating to localhost:50643 as 'root'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: [email protected]
debug1: kex: host key algorithm: ssh-rsa
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ssh-rsa SHA256:M1PmvueMNfm4q47UlzVWZMdB6YzxyYBy4I5hden9ctU
debug1: Host '[localhost]:50643' is known and matches the RSA host key.
debug1: Found key in /Users/haykbeglaryan/.ssh/known_hosts:23
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: ssh_rsa_key_to_box
debug1: Authentication succeeded (publickey).
Authenticated to localhost ([::1]:50643).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: pledge: network
debug1: Sending environment.
debug1: Sending env LC_CTYPE = UTF-8
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
Aiee, segfault! You should probably report this as a bug to the developer
debug1: channel 0: free: client-session, nchannels 1
debug1: fd 1 clearing O_NONBLOCK
Connection to localhost closed.
Transferred: sent 2640, received 1816 bytes, in 0.0 seconds
Bytes per second: sent 312354.4, received 214861.9
debug1: Exit status 1
最佳答案
问题出在dropbear使用的环境变量“LD_LIBRARY_PATH”中。当我打印时
$ echo $LD_LIBRARY_PATH
/vendor/lib:/system/lib
但是，当init.rc尝试读取它时，它为null。我只是在dropbear来源中修改了这一行，现在就可以正常使用了。