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1 SliTaz Secure File Storage
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2 ===============================================================================
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3
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4
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5 Ssfs is personal, secure, fast and light online file storage powered by
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6 SSH, Rsync, Lsyncd and SHell script. It monitors a local folder and automatically
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7 synchronizes the remote server. When files are transferred they are compressed and
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8 encrypted with SSH. Connections to the remote host are automated with a RSA key,
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9 and for each client the key must be sent to the server via a SSH password login.
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10
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11 Using ssfs lets you have a live synchronized and secure folder between many
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12 computers with an online copy on a secure Linux server. But even without any
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13 connections you have access to your files. Connections to the remote server
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14 can also be done using the command line and 'ssh' from any clients such as
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15 BSD, Android, OSX or Windows via Putty.
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16
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17 Ssfs is very easy to install, setup and configure to make your own secure online
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18 file storage. It provides a cmdline tool for the client and the server with a
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19 built in help. This README is also a howto in itself.
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20
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21 On the server side admin can choose by creating standard accounts or chrooted
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22 accounts which enforce server security by restricting available commands in a
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23 minimal chroot environment. User $HOME should be set to 0700 so users can't see
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24 other users files.
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25
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26
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27 Installation
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28 ------------
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29 To work you need a SSH client, 'rsync' and 'lsyncd' installed. On SliTaz you
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30 can simply install ssfs and it's dependencies or 'make install' from the
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31 source directory (see the Development section).
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32
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33
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34 Client help and setup
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35 ---------------------
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36 The cmdline interface ssfs lets you setup a client and start the daemon and
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37 synchronize live with your system session via the Window Manager autostart
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38 script or your personal ~/.profile file. To get a list of commands with
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39 a short description:
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40
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41 $ ssfs help
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42
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43 To setup a client by creating a Lua configuration file and sending the RSA key
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44 to the server, you can use the command 'setup'. Setup needs a login name and
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45 server name or IP address and it will also create a secure RSA if none exists:
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46
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47 $ ssfs setup --login=user --host=server
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48
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49
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50 GUI & Web interface
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51 -------------------
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52 Actually there is a small GTK/Yad but no web interface. The tool ssfs-box will
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53 display info if a configuration file exists or start the setup box.
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54
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55
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56 Get configs on boot
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57 -------------------
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58 Ssfs can be used in a boot scripts to connect to a remote host and retrieve data
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59 before a user session is started. It can be useful to provide persistent data for
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60 Live systems and web boot.
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61
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62
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63 Server setup
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64 ------------
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65 On the server you must have a SSH server running and an user account with a
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66 ~/Sync folder in user home. You can have both, staandard accounts or chrooted
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67 accounts, for a hosted service it is recommended to use a chroot and Ssfs
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68 virtual disk. The vdisk can be any size you want and have a minimal chroot
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69 environment that is under 3Mb.
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70
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71 If you want to create a vdisk and chroot automaticaly you can use use the tool
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72 ssfs-server. Here is a short example to create a chroot and create a user
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73 login 'tux-sync' with a protected $HOME in the chroot, the root directory can
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74 be specified on the command line or changed in the configuration file. The
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75 vdisk creation size is set in Gb and can be changed in config file or from
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76 the cmdline:
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77
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78 # ssfs-server gen-vdisk --size=2
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79 # ssfs-server adduser --login=tux-sync --id=2000 --pass=tuX0cc
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80
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81 Users can be listed or completely deleted including all files in home. More
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82 information can be found with: ssfs-server usage
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83
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84
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85 Ssfs virtual disk
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86 -----------------
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87 A virtual Ssfs disk is a raw file created with dd and formated in ext3. It is
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88 mounted by default on /ssfs and contain a minimal chroot environemt with users
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89 home directory. We use a virtual disk to enforce securiry and use a separate
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90 media for Ssfs secure files, it also protect the host and limit storage size.
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91 The tool ssfs-server handle vdisk creation but you can also create one manually
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92 or use a separate HD if the server have more than one disk. To create 2Gb
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93 vdisk and format it to ext3:
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94
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95 # dd if=/dev/zero of=/home/ssfs.ext3 bs=1G count=2
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96 # mkfs.ext3 -T ext3 -L "Ssfs" -F /home/ssfs.ext3
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97
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98 Now you have a virtual disk you can mount it, the path must match SSFS_CHROOT
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99 found in ssfs-server.conf, default mount point is /ssfs to clearly separate
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100 the filesystem from the standard host file hierarchy:
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101
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102 # mkdir /ssfs
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103 # mount -o loop -t ext3 /home/ssfs.ext3 /ssfs
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104
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105 To automaticaly mount the vdisk on boot you may want to add a ssfs system user
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106 and a line into the file /etc/fstab:
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107
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108 # adduser -S -g "Ssfs Server" -h /ssfs -s /bin/false ssfs
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109 /home/ssfs.ext3 /ssfs ext3 rw,loop,ssfs,ssfs 0 0
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110
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111 Server users config
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112 -------------------
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113 When adding a user with 'ssfs-server adduser', the user is added to the host
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114 /etc/passwd and a custom user config file is created in SSFS_USERS with the
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115 login name.
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116
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117
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118 Development and Bugs
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119 --------------------
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120 If you want to install the latest code to test and help in development you can
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121 clone the ssfs Mercurial repository. As usual, closely follow the SliTaz light
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122 philosophy with speed and security in mind:
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123
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124 $ hg clone http://hg.slitaz.org/ssfs
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125
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126 Install with 'make install' (DESTDIR is supported for packaging), update the POT
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127 file if any new strings have been added with 'make pot', and merger PO files with
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128 the command 'make msgmerge'. Any ideas are welcome and can be discussed. If you
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129 are searching for something to do you can have a look to the TODO file :-)
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130
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131 Bugs can be reported on the SliTaz mailing list, forum or scn since the devel
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132 forum is synced. All sites are liked from the main website at:
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133
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134 http://www.slitaz.org/
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135
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136
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137 ===============================================================================
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138
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