〖Android〗sshd for android, 及映射根文件系统至本地盘符
严重问题：
若移植失败将可能直接导致手机***无法开机***，导入相关文件需慎重！
达成效果：
1. ssh 远程登录 Android 终端；
2. sftp 挂载/映射 Android 根文件系统至本地网络驱动盘符；
适用场景：
前期开发过程中，需要做大量的调试，需要对Android文件系统频繁修改；
操作流程：
详细操作：
一、Linux操作系统相关的部分
1. 编译 openssh for Android
同步及编译Android源码的基础操作：[编译Android源码入门]
在一切准备就绪之后，输入以下命令：
source build/envsetup.sh lunch cm_mako-userdebug
mmm -B external/zlib
mmm -B external/openssl mmm -B external/openssh
将会生成以下的文件：
1.zlib
----------------------------------------
/media/Source/cm11/out/target/product/mako/system/lib/libz.so
/media/Source/cm11/out/target/product/mako/system/bin/gzip
2.openssl
----------------------------------------
out/target/product/mako/system/lib/libcrypto.so
out/target/product/mako/system/lib/libssl.so
out/target/product/mako/system/bin/ssltest
out/target/product/mako/system/bin/openssl
3.openssh
----------------------------------------
/media/Source/cm11/out/target/product/mako/system/lib/libssh.so
/media/Source/cm11/out/target/product/mako/system/bin/ssh
/media/Source/cm11/out/target/product/mako/system/bin/sftp
/media/Source/cm11/out/target/product/mako/system/bin/scp
/media/Source/cm11/out/target/product/mako/system/bin/sshd
/media/Source/cm11/out/target/product/mako/system/bin/sftp-server
/media/Source/cm11/out/target/product/mako/system/bin/ssh-keygen
/media/Source/cm11/out/target/product/mako/system/etc/ssh/sshd_config
/media/Source/cm11/out/target/product/mako/system/bin/start-ssh
把这些文件，拷贝至对应的位置即可，备份下载：http://pan.baidu.com/s/1o69DTV0
解压：tar zxf openssh_android_binary.tgz -C /
2. 配置Adnroid操作系统中的 sshd_config 文件
adb shell 登录 Android 操作系统后，vi /data/ssh/sshd_config，复制以下代码：
# Package generated configuration file # See the sshd_config(5) manpage for details # What ports, IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 # custom configure start # chnange the hostkey default path, by scue HostKey /data/ssh/ssh_host_rsa_key HostKey /data/ssh/ssh_host_dsa_key HostKey /data/ssh/ssh_host_ecdsa_key # custom configre end #Privilege Separation is turned on for security UsePrivilegeSeparation sandbox # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 120 PermitRootLogin yes StrictModes yes RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile /data/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords yes # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords #PasswordAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* # 这里指向 sftp 可执行文件的路径! Subsystem sftp /system/bin/sftp-server # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. #UsePAM yes # root login without passwd, by scue. # custom configure start PermitRootLogin without-password RSAAuthentication yes PubkeyAuthentication yes PermitEmptyPasswords yes # custom configure end
这个配置可以在 start-ssh & 执行之后，启动sshd的同时也启动了 sftp-server ，同时使root帐户无密码可登录（但需要RSA验证），同时还要执行以下命令行操作：
mount -o remount,rw /system mv /system/etc/ssh/sshd_config{,.bak} ln -s /data/ssh/sshd_config /system/etc/ssh/sshd_config
虽说Android代码中 sshd 执行时自动查找的是 /data/ssh/sshd_config，但是还是创建一个链接至 /system/etc/ssh/sshd_config的好，说不准哪天情况有变～
3. Android终端中生成 ssh_host_* 等等这些杂项文件：
在终端中输入以下命令：
cd /data/ssh/ ssh-keygen -t rsa -f ssh_host_rsa_key -N "" ssh-keygen -t dsa -f ssh_host_dsa_key -N "" ssh-keygen -t ecdsa -f ssh_host_ecdsa_key -N ""
4. 上传本地id_rsa.pub文件 >> 至 Android 手机中：
从sshd_config中的 AuthorizedKeysFile /data/.ssh/authorized_keys，这一行来看，很明了地知道，这个RSA公钥应当保存至/data/.ssh/authorized_keys文件中（这个RSA公钥在Linux中可以通过命令行 ssh-keygen -t rsa -C "your_email" 来生成，win上单独讲解）。
在Linux终端中输入以下命令：
adb root adb push ~/.ssh/id_rsa.pub /sdcard/id_rsa.pub adb shell mkdir -p /data/.ssh cat /sdcard/id_rsa.pub >> /data/.ssh/authorized_keys chmod 0600 /data/.ssh/authorized_keys
这样子，就可以在Linux终端中，输入 ssh root@ip_addr 来登录Android手机设备进行操作了，同时 sftp root@ip_addr 对文件操作也是可以的，Enjoy!
二、Windows操作系统相关的部分
大多数人，还是在Windows中操作，为了方便对Android中的设备文件进行操作，可通过”映射网络驱动器“的方式，挂载Android根目录至一个”盘符“，以root权限进行读写操作都是可以的。
主要的工具是：stfpdrive，下载链接：http://pan.baidu.com/s/1c048BTm，具体操作看图示：
最后，点击"connect"即可链接至手机（注：ip地址请根据设备的自身实际情况进行修改），最终效果图如下：
